DE102006062914B3 - Electronic component e.g. silicon controlled rectifier, manufacturing method, involves doping portion of body regions by introducing dopant atoms into portion through intermediate region formed between separate gate regions - Google Patents

Abstract

Method for producing a drain-extended MOS field-effect transistor, in which
A silicon-on-insulator structure is formed on or above a substrate;
A first doped connection region and a second doped connection region are formed in the silicon-on-insulator structure, wherein the first connection region and the second connection region have a first conductivity type and are connected to one of the first connection regions Region and the second terminal region formed electrically insulating layer of the silicon-on-insulator structure adjacent;
A first body region and a second body region are formed between the first connection region and the second connection region, wherein the first body region is formed between the first connection region and the second body region, wherein the second body region is formed between the first body region and the second attachment region, and wherein the first body region and the second body region adjoin the electrically insulating layer of the silicon-on-insulator structure;
The first body region and the second body region are doped by introducing dopant atoms, such that the first body region comprises the first body region;

Description

The invention relates to a method for producing a drain-extended MOS field-effect transistor, a drain-extended MOS field-effect transistor and an electronic component arrangement.

Electrostatic discharges (ESD) pose a permanent threat to integrated circuits (ICs). An ESD event, triggered by a large electrical voltage difference, results in a short electrical discharge pulse involving an electric current For example, a high current may flow through a normally electrically insulating material (eg, a gate oxide of a field effect transistor) and thereby cause damage to an electronic device of the IC. Protection against electrostatic discharges or ESD events is therefore imperative for all electronic components of a circuit.

The development of efficient ESD protection mechanisms is particularly important in the use of advanced process technologies such. B. FDSOI Technologies (Fully Depleted Silicon on Insulator) or FinFET Technologies (FinFET: Fin Field Effect Transistor) with a fin structure or fin structure or MuGFET technologies (MuGFET: Multi-Gate Field Effect Transistor = field effect transistor with a bridge structure in which a channel region is controlled by means of a gate of at least three sides) is a growing challenge, in view of the ever smaller dimensions of the electronic components and the associated increasing sensitivity to electrical surges.

To protect an integrated circuit from damage caused by electrostatic discharge, ESD protection elements must be installed on each input / output (I / O) pad and power supply pad of the IC become. These protection elements must be activated immediately as soon as a discharge occurs and must be subjected to the Voltage Overshoot, i. H. the exceeding of a critical voltage value, effectively limit. At the same time, they should not be damaged by the discharge itself, which forces currents of several amperes through the I / O devices and the protection elements.

One known efficient protection element is a silicon controlled rectifier (SCR), see e.g. For example, [1], [2]. It consists of an n ⁺ contact region and a p ⁺ contact region and two adjacent low-doped regions of different conductivity type (ie a weakly p-doped region and a weakly n-doped region) therebetween, which are arranged such that This results in a pnpn four-layer structure with three pn junctions.

1 shows a schematic cross-sectional view of a conventional SCR as an example 100 , which is implemented in an SOI technology. On a buried oxide layer (Buried Oxide, BOX) 101 of the SCR 100 are a highly p-doped (P +) first contact region 102 and a heavily n-doped (N +) second contact region 103 educated. On the first contact area 102 is a first silicide layer 102 formed, which by means of a first electrical contact 102b will be contacted. On the second contact area 103 is a second silicide layer 103a formed, which by means of a second electrical contact 103b is contacted electrically. The first contact area 102 , the first silicide layer formed thereon 102 and the first electrical contact 102b form an anode (in 1 indicated by "anode") of the SCR 100 while the second contact area 103 , the second silicide layer formed thereon 103a and the second electrical contact 103b a cathode of the SCR 100 form (in 1 indicated by "Cathode"). Between the first contact area 102 and the second contact area 103 are a weakly n-doped (N-) first body region 104 and a weakly p-doped (P) second body region 105 educated.

Clearly, the SCR 100 be understood as two laterally arranged, interdigitated bipolar transistors of different types, ie as a pnp transistor (formed from the first contact region 102 (P +), the first body area 104 (N-) and the second body area 105 (P-)) and an npn transistor (formed from the first body region 104 (N-), the second body area 105 (P-) and the second contact area 103 (N +)), where the collector of the pnp transistor forms the base of the npn transistor and vice versa.

A problem with making an SCR like the one in 1 shown SCR 100 This is the two low-doped body areas 104 (N-) or 105 (P-) between the two highly doped contact areas 102 (P +) and 103 (N +) of the SCR 100 to realize.

Conventional Bulk CMOS (Complementary Metal Oxide Semiconductor) technologies use so-called well implants (eg, Nwell implants and / or pwell implants) to form the low-doped base regions of an SCR while in conventional PDSOI technologies (PDSOI: Partially Depleted Silicon on Insulator) use so-called threshold voltage implantations or Vt implants to form the low-doped body regions.

Conventional methods (for example in a PDSOI technology) for realizing a lateral SCR are based on the fact that during the formation of the highly doped (P + or N +) contact regions (for example by ion implantation) the P + doping or N + doping in the regions where n-well doping (N-) and p-well doping (P-), respectively, is desired (in other words, in the regions which are to serve as lightly doped body regions of the SCR ) and also blocks silicide formation over the body areas to avoid short circuits between the heavily doped contact areas.

• 1) Das Blockieren der Silizid-Bildung erfordert eine spezielle Maske (Silizid-Blockier-Maske), welche in einem Standard-FDSOI-Prozess oder einem Standard-MuGFET-Prozess unter Umständen nicht zur Verfügung steht.
• 2) Zum Definieren des Abstandes zwischen den hochdotierten Elektroden-Bereichen und dem n-Wannenbereich (N–) bzw. p-Wannenbereich (P–) müssen nicht-selbstjustierende Prozessschritte verwendet werden, was zu einer größeren Streuung der Auslöse-Spannung (Trigger-Spannung) eines SCRs und/oder zum Auftreten von Leckströmen in dem SCR führen kann.
• 3) Falls – wie es für einen MuGFET-Prozess geplant ist – weder eine n-Wannen-Implantation (bzw. p-Wannen-Implantation) noch eine entsprechende Schwellenspannungs-Implantation (Vt-Implantation) in dem Prozess-Fluss zur Verfügung stehen, so kann das oben beschriebene Verfahren zum Ausbilden der niedrig dotierten Body-Bereiche von vornherein nicht durchgeführt werden.

The methods described above have the following disadvantages:

• 1) Blocking of silicide formation requires a special mask (silicide blocking mask), which may not be available in a standard FDSOI process or standard MuGFET process.
• 2) Non-self-aligning process steps must be used to define the distance between the highly doped electrode regions and the n-well region (N-) or p-well region (P-), resulting in a larger scatter of the trigger voltage (trigger voltage). Voltage) of an SCR and / or leakage currents may occur in the SCR.
• 3) If, as planned for a MuGFET process, there is neither an n-well implantation (or p-well implantation) nor a corresponding threshold voltage implantation (Vt-implantation) in the process flow, thus, the method described above for forming the low-doped body regions can not be carried out from the outset.

In a MuGFET process, well implantation or Vt implantation generally results in the dopant atoms being randomly distributed within the single transistor finger structure, with each individual transistor finger having only a few dopant atoms. Due to the statistical distribution of this extremely small number of dopant atoms, a MOSFET device fabricated in a MuGFET technology in this way would often have fluctuations of the threshold voltage Vt, the on current I _on, and the _off current I _off . The waiver of a well implantation is therefore based on the idea to reduce these fluctuations.

Intrinsic silicon material is used for the body regions of the NFET and the PFET. In this case, the threshold voltages of the NFET and the PFET must be adjusted by means of suitable gate materials.

Multigate FET devices (MuGFET) and FinFET devices are expected to be used in the future because of the limited scalability of traditional bulk CMOS technologies. These FinFET devices are typically designed for high-speed logic core applications, which are characterized by low supply voltages (eg, 0.8V to 1.2V). In order to keep process complexity low, devices are needed for the usually higher I / O supply voltages (eg 1.5 V to 2.5 V and higher), which devices do not require any additional process steps during production.

2 shows a conventional FinFET structure described in [3] 200 , The FinFET 200 has a fin structure (fin) 209 which is on a first electrically insulating layer 201 is formed over a substrate (not shown). On the first insulating layer 201 is a second insulating layer 201 ' formed, with the fin 209 from the second insulating layer 201 ' surrounded or partially in the second insulating layer 201 ' is embedded. On the Finn 209 is a gate dielectric 206a formed, and on a portion of the gate dielectric 206a and on a portion of the second insulating layer 201 ' is a gate 206 educated. In [3] a special manufacturing method is described for forming the FinFET device 200 , which FinFET device 200 suitable for standard supply voltages.

• (i) der Body des FinFETs 200 potentialfrei ist (Floating Body)
• (ii) der FinFET 200 einen hohen Leckstrom im ”Aus”-Zustand (off-state) aufweist
• (iii) der FinFET 200 einen Gate-induzierten Drain-Leckstrom aufweist, und
• (iv) der FinFEF 200 empfindlich gegenüber der Erzeugung von heißen Ladungsträgern (hot carrier generation) ist.

The proposed FinFET device 200 However, it is not suitable for high I / O supply voltages because

• (i) the body of the FinFET 200 is floating (Floating Body)
• (ii) the FinFET 200 has a high leakage current in the "off" state (off-state)
• (iii) the FinFET 200 has a gate-induced drain leakage current, and
• (iv) the FinFEF 200 is sensitive to the generation of hot carriers (hot carrier generation).

3 shows a conventional drain-extended-NMOS (DE-NMOS) field effect transistor described in [4] 300 (ie, an N-channel MOSFET with an extended drain region) for conventional CMOS bulk technologies. The DE-NMOS field effect transistor 300 has one in a p-doped substrate 301 (P-substrate) formed N-well area 322 (Nwell) and one in the substrate 301 trained P-tub area 323 (Pwell), where the N-well area 322 and the P-tub area 323 mask-aligned and doped by ion implantation. In the N-tub area 322 is an N + -doped drain region 302 formed, and in the P-well area 323 is an N + -doped source region 303 educated. A gate 306 is over a portion of the P-well area 323 and over a portion of the N-well area 322 educated. The DE-NMOS transistor 300 becomes lateral by means of trench isolation regions 330 (Shallow trench isolation, STI) electrically isolated. The actual MOS channel length of the DE-NMOS field effect transistor 300 is determined by the printed gate length minus the overlap X in the N-well region 322 ,

In CMOS bulk technologies, it is necessary that the N-well area 322 and the P-tub area 323 reach down relatively deep (depth about 1 micron to 2 microns). These technologies have a significant vertical and lateral outdiffusion of the doping atoms and thus the position of the pn junctions. Therefore, a problem with a DE-MOS device is generally to accurately control the electrically effective gate length (ie, the essential design parameter) of the device.

The motivation for using a DE-MOS device like the one in 3 shown is its suitability for higher supply voltages. This is done by the N-tub area 322 which reaches below the gate electrode 306 extends and thus an extended drain region (extended drain), in other words a drain extension, of the transistor 300 forms. Due to the lower dopant concentration of the N-well area 322 , compared to the standard N + drain doping, the electric field is in the drain region of the transistor 300 lower. As a result, a higher drain voltage can be used without the problem of hot carrier generation occurring.

A disadvantage of a DE-MOS field-effect transistor device is generally that a DE-MOS-FET has a lower "on" current and a higher "on" resistance. In the 3 shown DE-MOS structure 300 In addition, it is not compatible with SOI technology or MUGFET technology.

4 shows a conventional MOS field-effect transistor (MOS-FET) manufactured in a bulk technology 400 with a p-doped substrate 401 or a P-well area 401 and a first in the P-substrate / P-well region 401 formed N + -doped source / drain region 402 and a second in the P-substrate / P-well region 401 formed N + -doped source / drain region 403 , The N + doping of the source / drain regions 402 respectively. 403 is done using an N + photomask 413 whose outline is in 4 is shown. On the first source / drain area 402 is a first silicide layer 402a formed, which by means of a first electrical contact 402b is contacted electrically. On the second source / drain region 403 is a second silicide layer 403a formed, which by means of a second electrical contact 403b is contacted electrically. Above the P-substrate / P-well area 401 is between the first source / drain region 402 and the second source / drain region 403 a gate 406 and a gate dielectric 406a formed, at its sides two spacers 416 are formed. The MOS-FET 400 also has two in the P-substrate / P-well region 401 trained N-doped extension regions 404 on, each with an extension area 404 next to the first source / drain region 402 or next to the second source / drain region 403 below a spacer 416 is trained. Furthermore, the MOS-FET 400 two in the P-substrate / P-well region 401 trained P-halo implantation areas 405 on, each with a P-halo implantation area 405 below a spacer 416 is trained. Forming the P-halo Implantation Regions 405 is done using a P-halo photomask 415 whose outline is in 4 is shown. The two extension areas 404 and the two P-halo implantation regions 405 serve to suppress short channel effects in the MOS FET 400 ,

From [5] a finite field effect transistor is known.

The invention provides a method for producing a drain-extended MOS field-effect transistor, a drain-extended MOS field-effect transistor and a component arrangement having the features according to the independent patent claims.

Exemplary embodiments of the invention will become apparent from the dependent claims.

A method of manufacturing an electronic component is provided. In the method, a first doped connection region and a second doped connection region are formed on or above a substrate. Further, a body region is formed between the first doped terminal region and the second doped terminal region. Furthermore, at least two separate gate regions are formed on or above the body region. Furthermore, at least a portion of the body region is doped by introducing dopant atoms, wherein the introduction of the dopant atoms into the at least one subregion of the body region is effected by at least one intermediate region formed between the at least two separate gate regions.

There is further provided a method of fabricating a thyristor. In the method, a first doped connection region and a second doped connection region are formed on and above a substrate, wherein the first connection region has a first conductivity type and wherein the second connection region has a second conductivity type. Furthermore, at least two body regions are formed between the first connection region and the second connection region. At least one of the at least two body regions is doped by introducing dopant atoms of the first conductivity type and / or of the second conductivity type, the introduction of the dopant atoms into the at least one of the at least two body regions using a halo implantation method and / or A Vt implantation procedure is carried out.

Furthermore, a method is provided for producing a drain-extended MOS field-effect transistor, in which method a fin structure is formed on or above a substrate. In the fin structure, a first doped connection region and a second doped connection region are formed, wherein the first connection region and the second connection region have a first conductivity type. Furthermore, a first body region and a second body region are formed between the first connection region and the second connection region, wherein the first body region is formed between the first connection region and the second body region, and wherein the second body region is formed between the first body region and the second connection region. Furthermore, the first body region and the second body region are doped by introducing dopant atoms such that the first body region has the first conductivity type and the second body region has a second conductivity type opposite to the first conductivity type. Furthermore, a gate region is formed on or above the second body region and on or over at least a partial region of the first body region.

Furthermore, a method is provided for producing a drain-extended MOS field-effect transistor, in which method a silicon-on-insulator structure is formed on or above a substrate. In the silicon-on-insulator structure, a first doped junction region and a second doped junction region are formed, wherein the first junction region and the second junction region have a first conductivity type. Furthermore, a first body region and a second body region are formed between the first connection region and the second connection region, wherein the first body region is formed between the first connection region and the second body region, and wherein the second body region is formed between the first body region and the second connection region. Furthermore, the first body region and the second body region are doped by introducing dopant atoms such that the first body region has the first conductivity type and the second body region has a second conductivity type opposite to the first conductivity type. Furthermore, a gate region is formed on or above the second body region and on or over at least a partial region of the first body region.

Furthermore, an electronic component is provided with a first doped connection region and a second doped connection region, which are formed on or above a substrate. The electronic component further has a body region formed between the first doped connection region and the second doped connection region. Furthermore, the electronic component has at least two separate gate regions, which are formed on or above the body region. Furthermore, at least a partial region of the body region is doped with dopant atoms, wherein the dopant atoms are introduced through at least one intermediate region formed between the at least two separate gate regions into the at least one partial region of the body region.

Furthermore, a drain-extended MOS field-effect transistor is provided, which has a fin structure. The fin structure has a first doped junction region and a second doped junction region formed on a substrate, the first junction region and the second junction region having a first conductivity type; a first doped body region and a second doped body region formed between the first connection region and the second connection region, wherein the first body region is formed between the first connection region and the second body region and wherein the second body region is formed between the first body region and the second junction region, and wherein the first body region has the first conductivity type and the second body region has a second conductivity type opposite to the first conductivity type; a gate region which is on or above the second body Area and at least a portion of the first body area is formed.

Furthermore, a drain-extended MOS field-effect transistor is provided, which has a silicon-on-insulator structure. The silicon-on-insulator structure has a first doped junction region and a second doped junction region formed on a substrate, the first junction region and the second junction region having a first conductivity type ; a first doped body region and a second doped body region formed between the first connection region and the second connection region, wherein the first body region is formed between the first connection region and the second body region and wherein the second body region is formed between the first body region and the second junction region, and wherein the first body region has the first conductivity type and the second body region has a second conductivity type opposite to the first conductivity type; a gate region formed on and over the second body region and at least a portion of the first body region.

Furthermore, an electronic component arrangement is provided with a plurality of parallel electronic components.

At least one of the parallel-connected electronic components of the electronic component arrangement can be designed as a thyristor or as a drain-extended MOS field-effect transistor.

The embodiments of the invention described below apply analogously both to the method for producing an electronic component and to the method for producing a thyristor, to the method for producing a drain-extended MOS field-effect transistor, to the electronic component, to the drain-extended MOS Field effect transistor and the electronic component arrangement.

According to one embodiment of the invention, the substrate is formed as a semiconductor substrate, for example as a silicon substrate. The substrate may be formed as an intrinsic substrate, in other words as a substrate having an intrinsic conductivity. Alternatively, the substrate may be lightly doped (eg, weakly p-doped), in other words, the substrate may have a weak background doping.

According to another embodiment of the invention, an electrically insulating layer, for example a buried oxide layer (BOX), is formed in the substrate. In a substrate formed as a silicon substrate, a buried oxide layer may be formed as a buried silicon dioxide layer.

According to another embodiment of the invention, the first connection region and / or the second connection region and / or the at least one body region formed between the first connection region and the second connection region have silicon material.

According to another embodiment of the invention, the first connection region and / or the second connection region and / or the at least one body region formed between the first connection region and the second connection region are formed on an electrically insulating substrate formed in the substrate Layer formed, for example on a buried oxide layer (BOX). The two connection regions and the at least one body region can be clearly formed in a (for example intrinsic) layer formed on a buried oxide layer.

According to another embodiment of the invention, the first connection region and / or the second connection region are silicided. In other words, a first silicide layer is formed on the first connection region or in an upper subregion of the first connection region, and / or a second silicide layer is formed on the second connection region or in an upper subregion of the second connection region second silicide layer formed.

The first silicide layer and / or the second silicide layer may be formed such that a short circuit and / or an electrical contact or Schottky contact between the first silicide layer and a body region formed next to the first connection region or between the second silicide layer and a body region formed next to the second connection region.

According to another embodiment of the invention, a first electrical contact is formed on the first connection region (or on a first silicide layer formed on the first connection region), and / or on the second connection region (or on a second connection region) A second electrical contact is formed on the second terminal region formed second silicide layer). By means of a first silicide layer formed on the first connection region, the contact resistance between the first electrical contact and the first connection region can be reduced, and by means of a formed on the second terminal region second silicide layer, the contact resistance between the second electrical contact and the second terminal region can be reduced.

According to another embodiment of the invention, the first connection region and / or the second connection region are doped using an ion implantation method.

As an ion implantation method, for example, an HDD implantation method (HDD: Highly Doped Drain) can be used.

An HDD implantation method can be understood as a doping method which, for example, in the production of a field effect transistor serves to form one or more highly doped source / drain regions. An HDD implantation method may therefore alternatively be referred to as a source / drain implantation method, and dopant atoms introduced or implanted by means of an HDD implantation method may be referred to as HDD implants or as source / drain implants, respectively ,

In this regard, it should be noted that in a standard process flow in which the formation of a gate and one or more spacers is provided, HDD implantation usually occurs after the gate has been formed and after the spacer has been formed.

HDD implants used for n-doping may also be referred to as N + implants, and HDD implants used for p-doping may also be referred to as P + implants.

In an HDD implantation method, the introduction of the dopant atoms into a region to be doped (for example, the first connection region and / or the second connection region) along the direction of the surface normal, in other words perpendicular to the surface or under an implantation angle of 0 ° (0 angle degree).

According to another embodiment, the first connection region and / or the second connection region are doped (for example by means of an HDD implantation process) in such a way that they have a dopant concentration of approximately greater than 10 ²⁰ cm ^-3 .

The embodiments of the invention described below relate to the method for producing an electronic component and apply mutatis mutandis to the method for producing a thyristor, the method for producing a drain-extended MOS field effect transistor, the electronic component and the drain-extended MOS field effect transistor.

The electronic component may be formed to have a silicon-on-insulator (SOI) structure.

In other words, the electronic device can be implemented in SOI technology or using SOI technology (for example, FD-SOI technology (FD-SOI: Fully Depleted Silicon on Insulator)). Structure)). Stated another way, the method of fabricating an electronic device is compatible with SOI (SOI) process flow, such as FD-SOI process flow.

According to another embodiment of the invention, the electronic component is formed so that it has a fin structure or a fin. According to this embodiment, the first connection region and / or the second connection region and / or the body region formed between the first connection region and the second connection region can be formed such that they have a fin structure (fin). In other words, have a web structure, or form. The fin structure or fin can be applied to an electrically insulating layer, for. B. on a formed in the substrate buried oxide layer (Buried Oxide, BOX) may be formed.

In other words, the electronic component can be manufactured in a FinFET technology or a MuGFET technology. Stated another way, the method of fabricating an electronic device is compatible with FinFET (MuGFET) technology and FinFET process (MuGFET process) flow, respectively.

The embodiments of the invention described below relate to the method for producing an electronic component and apply mutatis mutandis to the electronic component.

According to another embodiment of the invention, the introduction of the dopant atoms into the at least one subregion of the body region is carried out using an ion implantation method, in other words with the aid of an ion implantation.

The introduction of the dopant atoms into the at least one partial region of the body region can be carried out using a halo-implantation method.

A halo-implantation method can be understood as a doping method in which dopant atoms are introduced or implanted at an angle to the surface normal (also called implantation angle) into a region to be doped (for example into the at least one partial region of the body region) become. In other words, the dopant atoms are introduced obliquely to the surface normal of the region to be doped. The implantation angle may be about 5 ° to 80 ° (5 to 80 degrees), wherein the implantation angle is measured between the surface normal of the region to be doped and the direction of propagation of the dopant atoms before impinging on the region to be doped. Accordingly, 0 ° = perpendicular to the surface, and 90 ° = parallel to the surface.

A halo-implantation method may alternatively be understood as a doping method which, in the production of a field-effect transistor, serves to localize a well-region dopant concentration locally (for example in a region around a curved source / drain region and / or under an extension) to increase to suppress short channel effects in the field effect transistor (cf. 4 ).

In this regard, it should be noted that in a standard process flow in which the formation of a gate and one or more spacers is provided, halo implantation usually occurs after the gate is formed and before the spacer is formed.

The dopant atoms introduced or implanted into a region to be doped by means of a halo implantation process are also referred to as halo implants.

Alternatively, the halo implants may also be referred to as pocket implants.

By means of a halo-implantation method, a dopant concentration of about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^{-3 can be achieved} in a region to be doped (for example in the at least one partial region of the body region).

In accordance with another embodiment of the invention, the introduction of the dopant atoms into the at least one subregion of the body region takes place using a Vt implantation method.

A Vt implantation method can be understood to mean a doping method which, for example, in the production of a MOS field effect transistor serves to set a threshold voltage Vt in the MOS field effect transistor.

In this regard, it should be noted that in a standard process flow in which the formation of a gate is provided, Vt implantation usually occurs before the gate is formed.

The dopant atoms introduced or implanted by means of a Vt implantation method can be referred to as threshold voltage implants (Vt implants) or as channel implants.

When using a Vt implantation method, the introduction of the dopant atoms in a region to be doped (for example in the at least one subregion of the body region) perpendicular to the surface, i. H. take place at an implantation angle of 0 ° (0 angle degree).

With the aid of a Vt implantation method, a dopant concentration of approximately 10 ¹⁷ cm ^-3 to 10 ¹⁸ cm ^{-3 can be achieved} in a region to be doped (for example in the at least one partial region of the body region).

In accordance with another embodiment of the invention, the introduction of the dopant atoms into the at least one subarea of the body region takes place using an HDD implantation method. The HDD implantation procedure may be used alternatively or in addition to a halo-implantation procedure. In other words, as an alternative or in addition to a halo implantation, an HDD implantation can take place; H. HDD implants may alternatively be introduced or implanted into the at least one subarea of the body region as an alternative or in addition to halo implants.

When using an HDD implantation method, the introduction of the dopant atoms in a region to be doped (for example in the at least one subregion of the body region) perpendicular to the surface, i. H. take place at an implantation angle of 0 ° (0 angle degree).

Alternatively, a LDD (Lightly Doped Drain) implantation method may be used to introduce the dopant atoms.

An LDD implantation process can be understood as a doping process which, for example, is used in the production of a MOS field-effect transistor, the Increase dopant concentration in a doped region. Alternatively, an LDD implantation method can be understood as a doping method which is used to form (source / drain) extension regions in a MOS transistor.

In this regard, it should be noted that in a standard process flow in which the formation of a gate and one or more spacers is provided, LDD implantation usually occurs after the gate is formed and before the spacer is formed.

The dopant atoms introduced or implanted by means of an LDD implantation process can be referred to as LDD implants.

When using an LDD implantation method, the introduction of the dopant atoms into a region to be doped (for example into the at least one subregion of the body region) at an implantation angle of 0 ° (0 angular degree, ie perpendicular to the surface) to 50 ° ( 50 degrees).

With the aid of an LDD implantation method, a dopant concentration of approximately 10 ¹⁸ cm ^-3 to 10 ²⁰ cm ^-3 in a region to be doped (for example in the at least one partial region of the body region) can be achieved.

One aspect of the invention can be seen in that one or more implantation methods or implantations (eg halo implantation, Vt implantation, HDD Implantation, LDD implantation) can be used, wherein the introduction of the dopants by at least one between at least two separate gate regions formed intermediate region is carried out. Since the doping takes place through one or more intermediate regions (clearly gaps) between the at least two gate regions, in a method for producing an electronic component for doping the body region (or the partial regions of the body region), for example, those can also be used Implantations are used, which are usually used in a standard process flow after the formation of a gate (such as, for example, Halo implantation, LDD implantation, HDD implantation).

According to another embodiment of the invention, the at least two separate gate regions each have an electrically insulating layer (gate dielectric), for. B. an oxide layer (gate oxide). An electrically conductive gate layer (eg made of polysilicon, a metal or another suitable electrically conductive material) may be formed on an electrically insulating layer of a gate region.

In an electronic component which has a fin structure or a fin, the at least two gate regions can be formed on or above the fin structure. The at least two gate regions may be formed on or over at least one side surface of the fin (visibly adjacent to the fin) and / or on or above the top surface of the fin. The at least two gate regions may be formed on or above the body region formed in the fin such that the body region can be driven from the two side surfaces of the fin, for example by forming a gate dielectric (e.g. a gate oxide) is formed on the top surface of the fin with a larger thickness than on the both side surfaces of the fin (double-gate structure). Alternatively, the at least two gate regions may be formed on or above the body region formed in the fin such that the body region can be driven from the two side surfaces and the top surface of the fin, for example by a gate dielectric (For example, a gate oxide) is formed both on the two side surfaces as well as on the top surface of the fin with a small thickness (triple-gate structure or multi-gate structure).

According to another embodiment of the invention, the body region is formed as an intrinsic region (in other words, as a region having an intrinsic conductivity), wherein at least a portion of the body region formed as an intrinsic region is doped by introducing dopant atoms.

The intrinsic region may, for example, be formed from a subregion of an intrinsic semiconductor substrate, for example a subregion of the substrate which is formed over an electrically insulating layer (for example a buried oxide layer) formed in the substrate. Illustratively, an electrically insulating layer (for example, a buried oxide layer) may be formed in an intrinsic substrate, and an intrinsic body region may be formed from an intrinsic layer remaining after forming the electrically insulating layer, wherein at least a portion of the intrinsic body Area in one another process step of the method is doped by introducing dopant atoms.

Alternatively, the body region can be formed as a weakly doped region, for example as a weakly p-doped region, wherein at least one subregion of the weakly doped (eg weakly p-doped) body region is introduced in another process step of the process by introducing is doped by dopant atoms.

A lightly doped body region may be formed from a portion of a lightly doped semiconductor substrate (eg, a semiconductor substrate having a background dopant such as a p-background dopant), for example, a portion of the lightly doped substrate, which portion over one is formed in the substrate formed electrically insulating layer (for example, a buried oxide layer). Illustratively, an electrically insulating layer can be formed in a lightly doped substrate, and a lightly doped body region can be formed from a subregion of the lightly doped substrate remaining over the electrically insulating layer, wherein at least one subregion of the body region is in another process step of the method is doped by introducing dopant atoms.

The at least two separate gate regions, which are formed on or above the body region, illustratively form a slotted gate or a slotted gate mask (also called "slotted gate" or "slotted gate mask") with individual ones Gate regions (hereinafter also referred to as gate strips), which gate regions or gates separated by intermediate regions or openings (ie regions which have no gate material) from each other.

The slotted gate can be formed on or over the body region, and the introduction of the dopant atoms (for example by means of a halo implantation process and / or an HDD implantation process) into the at least one subregion of the body region takes place vividly through the intermediate regions formed in the slotted gate (clearly through the slots or openings of the gate).

Clearly, one or more subregions of the body region are doped through a slotted gate mask. The subregions that are doped are clearly the exposed subregions of the body region, i. H. the areas of the body area that are not covered by gate material. The partial regions of the body region formed directly below the gate regions can be blocked by the gate regions formed above them, so that the dopant atoms are introduced only into the exposed partial regions of the body region formed below the intermediate regions.

In other words, the body region is locally doped (i.e., below the intermediate regions or below the openings of the slotted gate), or the dopant atoms are implanted locally (in the exposed regions of the body region). As a result, dopant concentration maxima can be generated locally (i.e., in the doped subareas) in the body region.

Illustratively, with the aid of doping through the slotted gate in the body region, regions with a high dopant concentration (ie the doped subareas below the intermediate regions) and regions with a low dopant concentration (ie the subregions below the gate regions which subregions have, for example, an intrinsic conductivity or a weak substrate background doping) are formed.

The at least one subregion of the body region can be n-doped and / or p-doped.

An n-doping of one or more subregions of the body region can be carried out by introducing n-halo implants. Alternatively or additionally, an n-doping can take place by introducing N + implants.

A p-doping of one or more subregions of the body region can be effected by introducing p-halo implants. Alternatively or additionally, p-doping may be effected by introducing P + implants.

The dopant concentration in one or more doped portions of the body region may be about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 (using a halo-implantation method) or about greater than 10 ²⁰ cm ^-3 (when used an HDD implantation procedure). In other words, a partial region of the body region formed below an intermediate region may have a dopant concentration of approximately 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 after introduction of the dopant atoms (and before a diffusion of the dopant atoms described below) Halo implantation method) or approximately greater than 10 ²⁰ cm ^-3 (using an HDD implantation method).

In this context, it should be noted that by forming narrow spacings between the individual gate regions (in other words narrow slits) and / or by using shallow implantation angles, a shading effect can be achieved, so that in this case the dopant concentration in the doped regions is lower may be considered the standard concentration value for the particular implantation procedure.

Due to a dopant concentration gradient forming in the body region between the doped subregions of the body region (high dopant concentration) (formed below the intermediate regions) and the adjacent undoped regions (formed below the gate regions) of the body region (Low dopant concentration), there may be a lateral out-diffusion of the introduced into the body region (or the doped portions of the body region) dopant atoms. In other words, part of the dopant atoms introduced into an exposed subarea of a body region can diffuse into the adjacent (non-doped) subareas of the body region, so that the dopant profile of the doped subarea does not intersect with the one or more adjacent to the doped subregion can expand doped portions. Clearly, a "dilution" of the introduced dopant atoms take place.

By means of the lateral outdiffusion or dilution of the dopant atoms, one or more dilute weakly (or very weakly) doped body subregions (also referred to as "dilute body regions") can be formed in the body region. In other words, one or more body subregions can be formed in the body region, which body subregions have a diluted dopant concentration or a diluted doping.

One aspect of the invention may be seen in that, by means of doping through a slotted gate, a dilution (or a reduction) of the dopant concentration in the at least one doped body Part of the body area is achieved. The doping can be done, for example, by means of a halo-implantation method and / or an HDD-implantation method, wherein in a conventional halo-implantation (ie without slotted gate), for example, a dopant concentration of about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 and in a conventional HDD implantation (without slotted gate), for example, a dopant concentration of about> 10 ²⁰ cm ^{-3 is achieved} in a region to be doped.

By doping the body region through a slotted gate according to the above-described aspect of the invention, a diluted dopant concentration of between about 10 ^{15 and 15} may be formed in the at least one doped body portion due to the above described diffusion mechanism cm ^-3 (basic doping of the substrate) and 10 ¹⁹ cm ^-3 (halo doping) can be achieved, wherein the dopant concentration in the body portion (at least averaged over the volume of the body portion) about 10 ¹⁷ cm ^-3 to 10 ¹⁸ cm ^-3 can be.

In other words, the standard concentration values of about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 (for a halo implantation) or 10 ²⁰ cm ^-3 (for a HDD implantation) by slotting (slitting the gate ) and outdiffusion to, for example, about 10 ¹⁷ cm ^-3 to 10 ¹⁸ cm ^-3

According to another embodiment of the invention, it is provided that at least one first doped subregion with a first conductivity type and at least one second doped subregion with a second conductivity type are formed by introducing dopant atoms.

The first connection region of the electronic component can be n-doped, for example by introducing N + implants. Alternatively, the first terminal region may be p-doped, for example, by introducing P + implants.

The second terminal region of the electronic component can be n-doped, for example by introducing N + implants. Alternatively, the second terminal region may be p-doped, for example, by introducing P + implants.

According to another embodiment of the invention, the at least two separate gate regions are formed such that at least two of the at least two separate gate regions have a spacing of approximately 5 nm to 500 nm. For example, the at least two separate gate regions may be formed such that two adjacent gate regions have a spacing which is smaller than the minimum feature size F of the technology used. The distance between two adjacent gate regions may be, for example, 15 nm to 60 nm.

According to another embodiment of the invention, at least one of the at least two separate gate regions has a length of approximately 5 nm to 200 nm. It is also possible for several or all gate regions to have a length of approximately 5 nm to 200 nm.

According to another aspect of the invention, the first terminal region is formed to have a first conductivity type, and the second terminal region is formed to have a second conductivity type opposite to the first conductivity type. Furthermore, according to this refinement, at least a first doped subregion is formed in the body region and at least one second doped subregion formed, wherein the at least one first doped subregion has the second conductivity type, and wherein the at least one second doped subregion has the first conductivity type. According to this embodiment, the at least one first doped partial area is formed between the first terminal area and the at least one second doped partial area, and the at least one second doped partial area is formed between the at least one first doped partial area and the second terminal area, so that According to this embodiment, the electronic component is designed as a thyristor or SCR (Silicon Controlled Rectifier).

An electronic component embodied as a thyristor or SCR can be used, for example, as an ESD protection element in an electrical circuit.

According to another embodiment of the invention, the first terminal region is p-doped (eg, p + doped), and the second terminal region is n-doped (eg, n + -doped). Furthermore, a plurality of n-doped first partial regions and a plurality of p-doped second partial regions are formed in the body region.

According to another embodiment of the invention, with the aid of the plurality of n-doped first partial regions, a diluted n-doped first body partial region is formed in the body region, and with the aid of the plurality of p-doped second partial regions a dilute p-doped one is formed second body portion formed in the body region, wherein the first body portion is formed between the first terminal portion and the second body portion and the second body portion formed between the first body portion and the second terminal portion is.

A p-doped first terminal region of an electronic component designed as a thyristor can be clearly referred to as an anode region or an anode of the thyristor, while an n-doped second terminal region as a cathode region or a cathode of the thyristor can be designated.

The thinned n-doped first body portion and the thinned p-doped second body portion of a thyristor may be formed by introducing dopant atoms (eg, halo implants and / or HDD implants) through a slotted gate mask (FIG. as described above).

Illustratively, the thinned n-doped first body portion and the thinned p-doped second body portion may function as the low-doped body portions of a conventional thyristor structure (see FIG. 1 ) fulfill.

An advantage of the invention can be seen in that, according to one embodiment, the low-doped body regions of a thyristor can be formed by means of a halo-implantation method, so that, for example, no well implantation is required, in contrast to a conventional method.

Another advantage of the invention can be seen in that by introducing the dopant atoms through the intermediate regions, a patterned or dilute dopant concentration in the body region (more precisely, in the diluted n-doped first) Body portion or the diluted p-doped second body portion) can be formed.

In other words, the effective dopant concentration (eg, a halo implantation) can be reduced by introducing dopant atoms through a patterned mask (eg, a slotted gate mask or a gate having a slit structure) into at least a portion of the body region are introduced or implanted, and that an outdiffusion of the implanted dopant atoms takes place, whereby a dilution of the doping can be achieved.

Another advantage resulting from the use of a halo-implantation method for introducing the dopant atoms can be seen in the introduction of the dopant atoms at an implant angle different from 0 ° (oblique implantation) together with a shading effect of the individual gate regions can lead to an efficient dilution of the doping can be achieved without, for example, a slotted gate with narrower slots would be required.

In accordance with another embodiment of the invention, the introduction of the dopants (for example the implantation of halo implants) into the at least one subregion of the body region takes place before a possible spacer or spacer is formed. An advantage of this embodiment can be seen in that the openings between the individual gate strips (in other words the intermediate regions between the separate gate regions) have a greater width before the spacers are formed.

Another advantage of the invention can be seen in that by means of forming the at least two separate gate regions (or gate stripe) on or over the body region, blocking of silicidation is not required.

According to another embodiment of the invention, the at least two separate gate regions are formed such that at least one first gate region formed on or above the first body subregion has a length of approximately 5 nm to 200 nm, and / or at least one formed on or over the second body portion of the second gate region has a length of about 5 nm to 200 nm. For example, the at least two separate gate regions may be formed such that one or more of the gate regions have a length that is less than the minimum feature size F of the technology used. The length of a gate region may be several tens of nm, for example 15 nm to 60 nm.

According to another embodiment of the invention, the distance between each two adjacent gate regions, in other words the width of an intermediate region formed between two adjacent gate regions, is approximately the same as the length of the gate regions.

In another embodiment of the invention, it is provided that at least one of the at least two separate gate regions is electrically contacted, for example by means of at least one electrical gate connection. An electrically contacted gate region may be used as a control gate for improved triggering of a thyristor.

For example, a plurality of first gate regions may be formed on or over the first body subregion, and may be electrically contacted together by means of a first electrical gate connection. Furthermore, a plurality of second gate regions can be formed on or over the second body subregion, and can be electrically contacted together by means of a second electrical gate connection.

According to another embodiment of the invention, the first connection region, the second connection region and the at least one doped partial region are formed so that they have the same conductivity type. Furthermore, according to this refinement, with the aid of the at least one doped partial region, a thinned doped first body partial region is formed in the body region, which doped first body partial region serves as an extended drain region, the doped first body partial region being formed in that between the doped first body subregion and the second connection region a second body subregion is formed in the body region which serves as a channel region. According to this embodiment, the doped first body portion (ie, the extended drain portion) is formed between the first terminal portion and the second body portion, and the second body portion (ie, the channel portion) is formed between the doped first portion Body subregion and the second connection region formed, so that according to this embodiment, a drain-extended MOS field effect transistor (DE-MOS-FET) is formed.

An advantage of this embodiment can be seen in the fact that an extended drain region of a DE-doped DE-MOS-FET can be formed by introducing at least one doped subregion in the body region by introducing dopant atoms through at least one intermediate region (for Example through openings or slots of a gate through) is formed. As already described above, a low dopant concentration (in other words, a "dilute" dopant concentration) in the extended drain region can be attained illustratively by diluting the dopant atoms introduced into the at least one subregion of the body region.

In the case of an electronic component designed as a drain-extended MOS field-effect transistor (DE-MOS-FET), the first connection region can clearly serve as a drain region or drain of the DE-MOS-FET, and the second connection region can clearly serve as a source region or a source of the DE-MOS-FETs. The thinned doped first body portion may serve as an extended drain region (drain extension) of the DE-MOS-FET, and the second body portion may be used as a channel region of the DE-MOS Serve -FETs.

According to another embodiment of the invention, it is provided that the at least two separate gate regions are formed such that a gate region is formed on or above the second body subregion (channel region), which gate region forms a Length of about 5 nm to 200 nm.

A gate region formed on or above the second body subregion (eg the channel region) can be electrically contacted (for example by means of a gate connection). By means of the electrically contacted gate region, the surface potential of the channel region can be controlled.

According to another embodiment of the invention, the first connection region and the second connection region are n-doped (eg n + - doped), for example by means of an HDD implantation method. Furthermore, according to this embodiment, the first body subregion is formed as a thinned n-doped first body subregion. In other words, an extended drain region is formed with a diluted n-type doping. Thus, a drain-extended NMOS field-effect transistor (DE-NMOS-FET) can be formed, ie an N-channel MOS field-effect transistor with an extended drain region (extended drain).

The channel region (or the second body subregion) may have an intrinsic conductivity or a weak background doping (eg weak p background doping).

According to another embodiment of the invention, the first connection region and the second connection region are p-doped (eg p + -doped), for example by means of an HDD implantation method. Furthermore, according to this embodiment, the first body subregion is formed as a dilute p-doped first body subregion. In other words, an extended drain region is formed with a dilute p-type dopant. Thus, a drain-extended-PMOS field-effect transistor (DE-PMOS-FET) can thus be formed, ie. H. a P-channel MOS field effect transistor with an extended drain region (extended drain).

According to another embodiment of the invention, a silicide layer is formed in or on the body region below the at least one intermediate region. In other words, silicidation of one or more subregions of the body region formed below the at least one intermediate region can take place. Stated another way, a silicidation of one or more of the exposed portions of the body region can take place.

According to another embodiment of the invention, the formation of silicidation of the exposed portions of the body region may be blocked, for example using a mask.

An advantage of the invention can be seen in that a drain-extended MOS field-effect transistor (DE-MOS-FET) can be formed by means of a method for producing an electronic component, which DE-MOS-FET is suitable for use, for example higher supply voltages.

The embodiments of the invention described below relate to the method for producing a thyristor.

The doping of the at least one of the at least two body regions can take place using a halo photomask.

According to another embodiment of the invention, the first terminal region is p-doped, and the second terminal region is n-doped.

According to another embodiment of the invention, the doping of the first connection region and / or the doping of the second connection region is carried out using a photomask.

In another embodiment of the invention, it is provided that a first body region and a second body region are formed between the first connection region and the second connection region, the first body region being between the first connection region and is formed in the second body region and wherein the second body region is formed between the first body region and the second connection region. According to this embodiment, the first body region is n-doped, and the second body region is p-doped.

According to another embodiment of the invention, a gate region is formed on or above the first body region and the second body region. The gate region may be used as a mask during the doping of the first connection region and / or the second connection region.

An advantage of the aforementioned embodiment can be seen in the fact that by using a gate region (or gate stack) as a mask or mask layer, a self-aligned definition of the body regions can be achieved without additional process complexity (for example in the form of FIG a silicide block) is added.

Furthermore, the gate region may be used as a mask during silicidation of the first connection region and / or the second connection region.

According to another embodiment of the invention, it is provided that a first body region, a second body region and a third body region are formed between the first connection region and the second connection region, the first body region between is formed between the first body region and the third body region, wherein the second body region is formed between the third body region and the second attachment region, and wherein the third body region is formed between the first body region and the third body region. Area and the second body area is formed. According to this embodiment, the first body region and the second body region are formed as intrinsic regions (in other words, regions with intrinsic conductivity), and the third body region is p-doped and / or n-doped. Furthermore, a first gate region is formed over the second body region, and a second gate region is formed over the first body region.

The doping of the third body region may additionally be done using an HDD implantation method or an LDD implantation method.

According to another embodiment, it is provided that the third body region is p-doped, and that a fourth body region is formed between the second body region and the third body region, which fourth body region is n-doped ,

According to another embodiment of the invention, the doping of the third body region and / or the doping of the fourth body region takes place after the formation of the first gate region and / or after the formation of the second gate region.

At least one gate region of the thyristor may have an electrically insulating layer (gate dielectric), eg. B. an oxide layer (gate oxide). An electrically conductive gate layer (eg made of polysilicon, a metal or another suitable electrically conductive material) may be formed on an electrically insulating layer of a gate region.

In a thyristor which has an on-structure or a fin, at least one gate region may be formed on or over at least one of the at least two body regions such that the at least one of the at least two body regions of the two Side surfaces of the fin can be controlled from (double-gate structure). Alternatively, the at least one gate region can be formed such that the at least one of the at least two body regions can be driven from the two side surfaces and the top surface of the fin (triple-gate structure or multi-gate structure).

In SOI technologies and MuGFET technologies, the existence of a Buried Oxide Bearing (BOX) allows the generation of a novel, exclusively lateral pn junction. The pn junction may be formed of a halo region (i.e., a region doped by means of a halo implantation) and a junction region (or source / drain region, respectively). This creates a new method for forming a four-layer SCR structure.

The embodiments of the invention described below relate to the method for producing a drain-extended MOS field-effect transistor and apply mutatis mutandis to the drain-extended MOS field effect transistor.

In a drain-extended MOS field-effect transistor with a silicon-on-insulator structure, the first terminal region, the second terminal region and the first body region and the second body region of the drain-extended MOS field-effect transistor on an electrically insulating layer, e.g. B. on a formed on the substrate buried oxide layer (Buried Oxide, BOX) may be formed.

A drain-extended MOS field-effect transistor made in FinFET technology may also be referred to as a drain-extended-finFET.

According to one aspect of the invention, a method for producing a drain-extended MOS field-effect transistor or a drain-extended MOS field-effect transistor (DE-MOS-FET) is provided, i. e. a MOS field-effect transistor with an extended drain region (so-called extended drain), which drain-extended MOS field-effect transistor is suitable, for example, for use at high input / output supply voltages (input / output supply voltage or I / O supply voltage ), z. B. at supply voltages of about 1.5 V to 2.5 V.

In other words, the drain-extended MOS field effect transistor (DE-MOS-FET) can be used for applications such as I / O circuits. Alternatively, however, the DE-MOS-FET can also be used in other applications.

The drain-extended MOS field-effect transistor can be produced in a FinFET technology (or MuGFET technology) or in an SOI technology (for example, FD-SOI technology).

The doping of the first body region and / or of the second body region can take place using a Vt implantation method.

According to another embodiment of the invention, it is provided that the first connection region, the first body region and the second connection region are n-doped, and that the second body region is p-doped, so that a drain region is p-doped. Extended NMOS field effect transistor is formed.

According to another embodiment of the invention, it is provided that the first connection region, the first body region and the second connection region are p-doped, and that the second body region is n-doped, so that a drain region is n-doped. Extended PMOS field effect transistor is formed.

According to another embodiment of the invention, the gate region is formed such that a partial region of the first body region remains free of the gate region. The length of the portion free of the gate region may be about 50 nm to 2000 nm.

• • der erste Anschluss-Bereich;
• • der zweite Anschluss-Bereich;
• • der Gate-Bereich;
• • der von dem Gate-Bereich freie Teilbereich des ersten Body-Bereiches.

According to another embodiment of the invention, it is provided that one or more of the following regions of the drain-extended MOS field effect transistor is silicided:

• • the first connection area;
• • the second connection area;
• The gate area;
• The portion of the first body area free of the gate area.

In another embodiment of the invention, it is provided that a mask is used, with the help of which a silicidation of the free region of the gate region of the first body region is blocked.

An advantage of the method of fabricating a drain-extended MOS field-effect transistor (DE-MOS-FET) can be seen in that the DE-MOS-FET (or method) is compatible with emerging MuGFET process technology. Another advantage can be seen in the fact that the method is also compatible with existing SOI technologies, for example, no additional process steps are required.

Furthermore, a more controllable and / or less off-diffusion can be achieved by a novel method of forming an extended drain region (and thus the actual gate length of the DE-MOS FET).

Another advantage of the method can be seen in that the method can be used to produce both NMOS device structures and PMOS device structures.

Embodiments of the invention are illustrated in the figures and are explained in more detail below. In the figures, the same or similar elements, if appropriate, provided with the same or identical reference numerals. The illustrations shown in the figures are schematic and therefore not drawn to scale.

Show it

1 a thyristor according to the prior art;

2 a fin field effect transistor according to the prior art;

3 a drain-extended NMOS field effect transistor according to the prior art;

4 a MOS field effect transistor according to the prior art;

5A a thyristor produced by a method of manufacturing a thyristor according to a first embodiment of the invention;

5B a thyristor produced by a method of manufacturing a thyristor according to a second embodiment of the invention;

6A a thyristor produced by a method of manufacturing a thyristor according to a third embodiment of the invention;

6B a thyristor produced by a method of manufacturing a thyristor according to a fourth embodiment of the invention;

6C a thyristor produced by a method of manufacturing a thyristor according to a fifth embodiment of the invention;

6D a thyristor produced by a method of manufacturing a thyristor according to a sixth embodiment of the invention;

7A a drain-extended MOS field effect transistor according to a seventh embodiment of the invention;

7B a drain-extended MOS field effect transistor according to an eighth embodiment of the invention;

8A a drain-extended MOS field effect transistor according to a ninth embodiment of the invention;

8B a drain-extended MOS field effect transistor according to a tenth embodiment of the invention;

9 a layout diagram of an electronic component assembly according to an eleventh embodiment of the invention;

10A to 10F various process steps of a method for manufacturing an electronic component according to a twelfth embodiment of the invention;

11 a thyristor produced by a method of manufacturing an electronic component according to a thirteenth embodiment of the invention;

12A to 12F various process steps of a method for manufacturing an electronic component according to a fourteenth embodiment of the invention;

13 a drain-extended MOS field effect transistor manufactured by a method of manufacturing an electronic component according to a fifteenth embodiment of the invention;

14 a drain-extended MOS field effect transistor manufactured by a method of manufacturing an electronic component according to a sixteenth embodiment of the invention;

15 a drain-extended MOS field-effect transistor, produced by means of a method for producing an electronic component according to a seventeenth embodiment of the invention.

5A shows a cross-sectional view of a thyristor 500 or SCRs (Silicon Controlled Rectifier) 500 , which is produced by a method for producing a thyristor according to a first embodiment of the invention. The thyristor 500 has a completely charge-depleted SOI structure (SOI: Silicon on Insulator), ie an FD-SOI structure (Fully Depleted SOI).

According to the illustrated embodiment, in the method of manufacturing the thyristor 500 in a first process step a buried oxide layer (BOX) 501 in a semiconductor substrate (not shown), for example in a silicon substrate, such that a thin (monocrystalline) silicon layer (not shown, cf. 1007 ' in 10A ) is formed on the surface of the substrate.

In another process step of the method, an n-doped first body region is formed in the silicon layer by means of a halo implantation method (alternatively or additionally by means of a Vt implantation method) 504 educated. The n-doping of the first body area 504 is done using an N-halo photomask (or an N-Vt photomask) whose outline 514 in 5A is shown.

In another process step of the method, a p-doped second body region is formed in the silicon layer by means of a halo implantation method (alternatively or additionally by means of a Vt implantation method) 505 educated. The p-doping of the second body region 505 is done using a P-halo photomask (or a P-Vt photomask), whose outline 515 in 5A is shown. The p-doped second body area 505 is next to the n-doped first body area 504 formed such that the n-doped first body region 504 and the p-doped second body region 505 have a common first interface. Illustrate the first body area 504 and the second body area 505 a first pn-junction (pn-junction) of the thyristor 500 ,

The introduction of the dopant atoms in the first body area 504 (n-doping) and / or in the second body area 505 (P-type doping) by the halo-implantation method may be performed at an implantation angle of about 5 ° to 80 °. The dopant concentration in the first body region 504 and / or in the second body area 505 may be about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 .

In another process step of the method, a heavily p-doped (P +) first terminal region is formed in the silicon layer by means of an HDD implantation process (HDD: Highly Doped Drain) 502 educated. The p-doping of the first connection region 502 is done using a P + photomask, whose outline 512 in 5A is shown. The heavily p-doped first port area 502 is next to the n-doped first body area 504 formed such that the n-doped first body region 504 and the p-doped second body region 505 have a common second interface. Clearly form the heavily p-doped first connection area 502 and the n-doped first body area 504 a second pn junction of the thyristor 500 ,

In another process step of the process, a heavily n-doped (N +) second terminal region is formed in the silicon layer by means of an HDD (Highly Doped Drain) implantation process 503 educated. The n-doping of the second connection region 503 is done using an N + photomask, whose outline 513 in 5A is shown. The heavily n-doped second port area 503 is next to the p-doped second body area 505 formed such that the p-doped second body region 505 and the n-doped second port Area 503 have a common third interface. Illustrative form the p-doped second body area 505 and the heavily n-doped second port region 503 a third pn junction of the thyristor 500 ,

The dopant concentration in the first body region 504 and / or in the second body area 505 may be greater than 10 ²⁰ cm ^-3 .

In another process step of the method, a silicidation of the first connection region takes place 502 and the second port area 503 , In other words, on the first connection area 502 or in an upper portion of the first connection area 502 a first silicide layer 502a formed, and on the second connection area 503 or in an upper portion of the second connection area 503 becomes a second silicide layer 503a educated. A silicidation of the first body area 504 or the second body area 505 can be prevented or blocked with the aid of a mask (silicide blocking mask), whereby the mask can be clearly seen from the forms of the masks 514 and 515 can be formed.

In the in 5A In the exemplary embodiment shown and in the following exemplary embodiments, the silicide layers formed on the connection regions or in upper subregions of the respective connection regions (for example, the first silicide layer 502a and the second silicide layer 503a ) are formed so as to avoid a short circuit and / or a Schottky contact between a silicide layer and a body region formed adjacent to the corresponding terminal region.

In another process step of the method, a first electrical contact 502b on the first silicide layer 502a formed, and a second electrical contact 503b is on the second silicide layer 503a educated. The first electrical contact 502b is used for electrically contacting the first connection area 502 wherein the contact resistance between the first electrical contact 502b and the first port area 502 with the help of the first silicide layer 502a can be reduced. Accordingly, the second electrical contact is used 503b for electrically contacting the second connection region 503 wherein the contact resistance between the second electrical contact 503b and the second port area 503 with the help of the second silicide layer 503a can be reduced.

The first connection area 502 , the first silicide layer 502a and the first electrical contact 502b Illustratively form an anode region or an anode (by "anode" in 5A characterized) of the thyristor 500 while the second connection area 503 , the second silicide layer 503a and the second electrical contact 503b Illustratively, a cathode region or a cathode (by "Cathode" in 5A characterized) of the thyristor 500 form.

The heavily p-doped first port area 502 (P +), the n-doped first body region 504 , the p-doped second body area 505 and the heavily n-doped second port region 503 (N +) together form a pnpn four-layer structure of the thyristor 500 with a total of three pn junctions.

According to in connection with 5A described embodiment of the invention, the first body area 504 and the second body area 505 of the thyristor 500 are formed by implanting halo implants (alternatively or additionally by means of Vt implants) into predetermined (for example lithographically defined) regions. This is a non-self-aligned process. The complete thyristor 500 can be obtained by silicide blocking or masking by means of a gate (cf. 5B ).

In an alternative (not shown) embodiment of the invention, the thyristor 500 be formed using a MuGFET technology. In other words, the thyristor 500 in this case have a one-structure or web structure, with a fin, in which the two connection areas 502 . 503 and the two body areas 504 . 505 of the thyristor 500 are formed.

In SOI technologies and MuGFET technologies, the presence of the buried oxide layer makes it possible 501 the creation of a novel, exclusively lateral pn junction (pn-junction) between a halo region, in other words a region which has been doped by means of a halo implantation (ie the two body regions 504 respectively. 505 ) and a heavily doped terminal area (ie the two terminal areas 502 respectively. 503 ).

5B shows a cross-sectional view of a thyristor 520 , which is produced by a method for producing a thyristor according to a second embodiment of the invention. The thyristor 520 has a completely charge-depleted SOI structure (SOI: Silicon on Insulator), ie an FD-SOI structure (Fully Depleted SOI).

According to the illustrated embodiment, in the method of manufacturing the thyristor 520 in a first process step a buried oxide layer (BOX) 501 in one Semiconductor substrate (not shown), for example, in a silicon substrate, formed such that a thin silicon layer (not shown, see 1007 ' in 10A ) is formed on the substrate surface.

In another process step of the method, an n-doped first body region is formed in the silicon layer by means of a Vt implantation process 504 (N-) formed. The n-doping of the first body area 504 can, as related to 5A described using an N-Vt photomask done.

In another process step of the method, a p-doped second body region is formed in the silicon layer by means of a Vt implantation method 505 (P-) formed. The p-doping of the second body region 505 can, as related to above 5A described using a P-Vt photomask done.

The p-doped second body area 505 is next to the n-doped first body area 504 formed such that the n-doped first body region 504 and the p-doped second body region 505 have a common first interface. Illustrate the first body area 504 and the second body area 505 a first pn junction (pn-junction) of the thyristor 520 ,

The dopant concentration in the first body region 504 and / or in the second body area 505 may be about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 .

In another process step of the method becomes on or over the first body area 504 and the second body area 505 a gate area 506 formed, which gate area 506 is electrically coupled to a gate terminal G. The gate area 506 has an electrically insulating layer 506 ' (Gate dielectric), e.g. As a gate oxide, which is electrically insulating layer 506 ' on the first body area 504 and the second body area 505 is formed, as well as one on the electrically insulating layer 506 ' formed electrically conductive layer 506 '' (conductive gate layer of eg polysilicon, a metal or other suitable electrically conductive material).

In another process step of the method, a heavily p-doped (P +) first terminal region is formed in the silicon layer by means of an HDD implantation process (HDD: Highly Doped Drain) 502 formed, with the gate area 506 serves as a mask, allowing the P + implantation in the area below the gate area 506 (ie in the two body areas 504 and 505 ) is blocked. The heavily p-doped first port area 502 is next to the n-doped first body area 504 formed such that the n-doped first body region 504 and the p-doped second body region 505 have a common second interface. Clearly form the heavily p-doped first connection area 502 and the n-doped first body area 504 a second pn junction of the thyristor 520 ,

In another process step of the process, a heavily n-doped (N +) second terminal region is formed in the silicon layer by means of an HDD (Highly Doped Drain) implantation process 503 formed, with the gate area 506 in turn serves as a mask, allowing the N + implantation in the area below the gate area 506 (ie in the two body areas 504 and 505 ) is blocked. The heavily n-doped second port area 503 is next to the p-doped second body area 505 formed such that the p-doped second body region 505 and the n-doped second port region 503 have a common third interface. Illustrative form the p-doped second body area 505 and the heavily n-doped second port region 503 a third pn junction of the thyristor 520 ,

The dopant concentration in the first port region 502 and / or in the second connection area 503 may be greater than 10 ²⁰ cm ^-3 .

In another process step of the method, a silicidation of the first connection region takes place 502 , the second connection area 503 and the gate area 506 , In other words, on the first connection area 502 or in an upper portion of the first connection area 502 a first silicide layer 502a formed on the second connection area 503 or in an upper portion of the second connection area 503 becomes a second silicide layer 503a formed, and on the gate area 506 becomes a third silicide layer 506a educated. A silicidation of the first body area 504 or the second body area 505 In turn, this is done with the help of the gate area 506 or the gate stack (gate stack) 506 , which gate area 506 clearly serves as a mask, prevents or blocks.

It becomes clear in connection with 5B described embodiment of the invention, the gate region 506 or gate stack 506 (For example, the polysilicon material or metal material of the gate electrode 506 '' ) is used as a masking layer to perform an HDD implantation (N + implantation) and / or silicidation in the low-doped first body region 504 and the low-doped second body region 505 to block. In other words, the gate stack 506 used as a mask layer or mask to provide a self-aligned Definition of body areas 504 respectively. 505 of the thyristor 520 without adding additional process complexity such as silicide blocking.

Analogous to that related to 5A described embodiment, in the method for producing the thyristor 520 in other process steps, a first electrical contact 502b on the first silicide layer 502a formed and a second electrical contact 503b on the second silicide layer 503a educated.

The gate area 506 or the gate 506 of in 5B shown thyristor 520 can be used as a control gate to achieve improved triggering of the thyristor. For this purpose, by means of the gate terminal G at the gate 506 applied electric potential are controlled accordingly, which in turn the surface potential of the first body area 504 and / or the second body area 505 can be controlled.

The in 5B shown thyristor 520 is made using SOI technology. In an alternative (not shown) embodiment of the invention, the thyristor 520 be formed using a MuGFET technology. In other words, the thyristor in this case may have a fin structure with a fin in which the two terminal regions 502 . 503 and the two body areas 504 . 505 of the thyristor 520 are formed.

In a thyristor with a fin structure or fin, the gate 506 so on or above the first body area 504 and the second body area 505 Be educated that the first body area 504 and the second body area 505 can be controlled from the two side surfaces of the fin (double-gate structure). Alternatively, the gate 506 Be formed so that the two body areas 504 and 505 can be controlled from the two side surfaces and the top surface of the fin (triple-gate structure or multi-gate structure).

6A shows a cross-sectional view of a thyristor 600 , which is produced by a method for producing a thyristor according to a third embodiment of the invention. The thyristor 600 has a completely charge-depleted SOI structure (SOI: Silicon on Insulator), ie an FD-SOI structure (Fully Depleted SOI).

According to the illustrated embodiment, in the method of manufacturing the thyristor 600 in a first process step a buried oxide layer (BOX) 501 in a semiconductor substrate (not shown), for example in a silicon substrate, such that a thin silicon layer (not shown, cf. 1007 ' in 10A ) is formed on the surface of the substrate.

In other process steps of the method, a first connection region is formed in the silicon layer 502 and a second connection area 503 formed, as well as a first body area 604 , a second body area 605 and a third body area 607 , being the first body area 604 between the first connection area 502 and the third body area 607 is formed, the second body area 605 between the third body area 607 and the second port area 503 is formed and the third body area 607 between the first body area 604 and the second body area 605 is formed.

The first body area 604 is formed as a region having an intrinsic conductivity or intrinsic region (represented by "i" in FIG 6A marked), and the second body area 605 is also formed as an intrinsic region (also denoted by "i" in 6A in).

The one between the intrinsic first body area 604 and the intrinsic second body area 605 trained third body area 607 becomes a p-doped third body region by a halo-implantation method 607 (P-halo) formed. On or above the intrinsic second body area 605 becomes a first gate area 606a formed, which first gate area 606a is electrically coupled to a first gate terminal G1. The first gate area 606a has one on the second body area 605 formed first electrically insulating layer 606a ' (Gate dielectric), e.g. As a gate oxide, on, and one on the first electrically insulating layer 606a ' formed first electrically conductive layer 606a '' (conductive gate layer of eg polysilicon, a metal or other suitable electrically conductive material). Further, on or above the intrinsic first body area 604 a second gate area 606b formed, which second gate area 606b is electrically coupled to a second gate terminal G2. The second gate area 606b has one on the first body area 604 formed second electrically insulating layer 606b ' (Gate dielectric), e.g. B. a gate oxide, on, and one on the second electrically insulating layer 606b ' formed second electrically conductive layer 606b '' (conductive gate layer of eg polysilicon, a metal or other suitable electrically conductive material).

According to the exemplary embodiment shown, the formation of the p-doping takes place in the third body region 607 after forming the first gate region 606a and after training of the second gate region 606b by introducing halo implants into the third body area 607 (Halo implantation), with the first gate area 606 and the second gate area 606 ' clearly serve as a mask.

Alternatively, in an alternative embodiment of the invention, first doping the third body region 607 by P-Vt implantation (eg using a lithography mask or a Vt photomask, not shown), and then the first gate region 606a and the second gate area 606b on or above the first body area 604 or the second body area 605 be formed.

When using a halo-implantation method, the introduction of the dopant atoms in the third body region 607 at an implantation angle of about 5 ° to 80 °.

Both when using a halo implantation and when using a Vt implantation, the doping of the third body region 605 such that the dopant concentration in the third body area 605 is about 10 ¹⁸ cm ^-3 to 10 ¹⁹ cm ^-3 .

In another process step of the method becomes the first port area 502 using a HDD implantation method (HDD: Highly Doped Drain) heavily p-doped (P +), wherein the second gate area 606b serves as a mask, allowing the HDD implantation below the second gate area 606b (ie in the area of the intrinsic first body area 604 ) is blocked. Analogously, in another process step of the method, the second connection region 503 using a HDD implantation method (HDD: Highly Doped Drain) heavily n-doped (N +), with the first gate area 606a serves as a mask, allowing the HDD implantation below the first gate area 606a (ie in the area of the intrinsic second body area 605 ) is blocked. In this context, it should be noted that the masking effect of the gate areas 606a respectively. 606b is used only for accurate, self-aligning alignment of the respective implantations. In addition, "global" N + / P + masks may be present in the process and in the definition of heavily doped connection areas 502 respectively. 503 be co-used.

The dopant concentration in the first port region 502 and / or in the second connection area 503 may be greater than 10 ²⁰ cm ^-3 .

In another process step of the method, a first electrical contact 502b on the first connection area 502 (alternatively on one on the first connection area 502 trained first silicide layer 502a , see. 6D ), and a second electrical contact 503b will be on the second connection area 503 (alternatively on one on the second connection area 503 formed second silicide layer 503a , see. 6D ) educated. The first electrical contact 502b is used for electrically contacting the first connection area 502 , Accordingly, the second electrical contact is used 503b for electrically contacting the second connection region 503 ,

The first connection area 502 (the optional first silicide layer 502a ) and the first electrical contact 502b Illustratively form an anode region or an anode (by "anode" in 6A characterized) of the thyristor 600 while the second connection area 503 (the optional second silicide layer 503a ) and the second electrical contact 503b Illustratively, a cathode region or a cathode (by "Cathode" in 6A characterized) of the thyristor 600 form.

In an alternative (not shown) embodiment of the invention, the thyristor 600 be formed using a MuGFET technology. In other words, the thyristor 600 in this case, a fin structure or web structure, with a fin, in which the two connection areas 502 . 503 and the three body areas 604 . 605 and 607 of the thyristor 600 are formed.

In a thyristor with a fin structure or fin, the first gate 606a and / or the second gate 606b be formed so that the second body area 605 and / or the first body area 604 can be controlled from the two side surfaces of the fin (double-gate structure). Alternatively, the first gate 606a and / or the second gate 606b be formed so that the second body area 605 and / or the first body area 604 can be controlled from the two side surfaces and the top surface of the fin (triple-gate structure or multi-gate structure).

6B shows a cross-sectional view of a thyristor 620 , which is produced by a method for producing a thyristor according to a fourth embodiment of the invention. The thyristor 620 unlike the one in 6A shown thyristor 600 an n-doped third body area 627 on, with the n-doping of the third body area 627 can be achieved by a halo-implantation method (alternatively by means of a Vt-implantation method). The process for the preparation of in 6B shown thyristor 620 is analogous to that of the in 6A shown thyristor 600 and therefore will not be described again for the sake of brevity. The thyristor 620 can, like the thyristor 600 , are manufactured using SOI technology (eg FD-SOI technology) or MuGFET technology.

Vividly the in 6A and 6B shown thyristors 600 respectively. 620 a central area (ie the third body area 607 respectively. 627 ) with a dopant species which is between two intrinsic regions (first body region 604 and second body area 605 ) is trained.

6C shows a cross-sectional view of a thyristor 640 , which is produced by a method for producing a thyristor according to a fifth embodiment of the invention. The method for producing the thyristor 640 is different from the related 6A described method in that the thyristor 640 in addition to a p-doped third body region 647 an n-doped fourth body area 648 is formed, the fourth body area 648 between the p-doped third body region 647 and the intrinsic second body area 605 is formed. The central area of the thyristors becomes clear 600 respectively. 620 (ie the p-doped third body region 607 or the n-doped third body area 627 ) with only one dopant species in the thyristor 640 by one of two subregions with opposite doping (ie, the p-doped third body region 647 and the n-doped fourth body region 648 ) replaced central area, which central area between the two intrinsic areas 604 and 605 is trained. The method for producing the thyristor 640 is similar to that related to 6A described method and will therefore not be repeated again at this point.

The thyristor 640 can, like the previously described thyristors 600 and 620 , are fabricated using SOI technology (eg, FD SOI technology) or MuGFET technology, and the structure shown 640 is compatible with a standard process flow in the appropriate technology

6D shows a cross-sectional view of a thyristor 660 , which is produced by a method for producing a thyristor according to a sixth embodiment of the invention. The method for producing the thyristor 660 is different from the one related to 6A described method in that the third body area 678 of the thyristor 660 both p-doped and n-doped. In other words, that is between the intrinsic body areas 604 and 605 trained central area (ie the third body area 678 ) of the thyristor 660 is formed as a region in which a p-implantation (or p-doping) and an n-doping (or n-doping) completely or at least partially compensate each other, in other words as a region with opposite dopant or counter- doped area (in 6D represented by "P / N"). The doping of the third body area 678 is carried out by means of a halo-implantation method and / or by means of an HDD implantation method (P + / N + implantation), wherein the first gate region 606 and the second gate area 606 ' can serve as a mask, so that a self-alignment of the body areas can be achieved.

In the 6D shown structure 660 Similar to the structure of a pin diode, which pin diode in the breakdown shows a similar behavior as an SCR. An advantage of the structure shown 660 can be seen in self-alignment.

In addition, if both p- and n-halo implantations as well as p- and n-HDD implantations for doping the third body area 678 (ie, simultaneous halo doping and HDD doping of the third body region 678 ), in the manufacture of the thyristor 660 common halo and HDD masks are used. In other words, a first common mask may be used for n-halo implantation and n-HDD implantation, and for p-halo implantation and p-HDD implantation, a second common mask may be used. Thus, the number of masks used is identical to the number of masks used in a standard process, ie no additional masks are needed.

The thyristor 660 can, like the previously described thyristors 600 . 620 and 640 , are manufactured using SOI technology (eg FD-SOI technology) or MuGFET technology.

7A shows a cross-sectional view of a drain-extended MOS field effect transistor (DE-MOS-FETs) 700 according to a seventh embodiment of the invention. The DE-MOS-FET 700 has one on a buried oxide layer (Buried Oxide, BOX) 701 trained fin structure 709 on. The oxide layer 701 can on a semiconductor substrate such. B. a silicon substrate may be formed (not shown). The fin structure 709 or fin 709 may comprise silicon material. In an alternative embodiment (not shown) of the invention, the drain-extended MOS field-effect transistor 700 have a silicon-on-insulator structure (SOI structure), for. As a completely depleted of charge carriers SOI structure (Fully Depleted SOI, FD-SOI).

The fin structure 709 has a heavily n-doped (N +) first port region 702 and a heavily n-doped (N +) second terminal region 703 on. The doping of the first connection region 702 and / or the second connection area 703 can with the help of an ion implantation method such as. As a HDD implantation method (Highly Doped Drain) or a source / drain implantation method, wherein a dopant concentration of approximately greater than 10 ²⁰ cm ^-3 in the first terminal region 702 and / or in the second connection area 703 can be achieved.

The first connection area 702 can by means of one on the first connection area 702 trained first electrical contact 702b electrically contacted, and the second connection area 703 can by means of one on the second connection area 703 trained second electrical contact 703b be contacted electrically. In an alternative embodiment (not shown) of the invention, the first connection region 702 and / or the second port area 703 be silicided (ie it may be a silicide layer formed on the respective terminal region or in an upper portion of the respective terminal region), so that the contact resistance between the first electrical contact 702b and the first port area 702 or between the second electrical contact 703b and the second port area 703 can be reduced.

The first connection area 702 and the first electrical contact 702b serve illustratively as a drain area (in 7A characterized by "drain") of the drain-extended MOS field-effect transistor 700 while the second connection area 703 and the second electrical contact 703b vividly as a source area (in 7A denoted by "source") of the DE-MOS-FETs 700 serve.

Between the first connection area 702 and the second port areas 703 are a weakly n-doped (N-) first body region 704 and a weakly p-doped (P) second body region 705 trained, being the first body area 704 between the first connection area 702 and the second body area 705 is formed and the second body area 705 between the first body area 704 and the second port area 703 is trained.

The doping of the first body area 704 and / or the second body area 705 can with the help of an ion implantation method such as. B. a Vt implantation method, wherein a dopant concentration of about 10 ¹⁷ cm ^-3 to 10 ¹⁸ cm ^-3 in the first body area 704 and / or in the second body area 705 can be achieved.

On or above the first body area 704 and the second body area 705 is a gate area 706 educated. The gate area 706 has one on the first body area 704 and the second body area 705 formed electrically insulating layer (gate dielectric) 706 ' on (eg, a gate oxide), as well as on the electrically insulating 706 ' Layer formed electrically conductive layer 706 '' (conductive gate layer of eg polysilicon, a metal or other suitable electrically conductive material).

The gate 706 can be so on or above the first body area 704 and the second body area 705 Be educated that the first body area 704 and the second body area 705 from the two side surfaces of the fin 709 can be controlled from (double-gate structure). Alternatively, the gate 706 be formed so that the first body area 704 and the second body area 705 from the two side surfaces and the top surface of the fin 709 can be controlled from (triple-gate structure or multi-gate structure).

The in 7A shown drain-extended MOS field effect transistor 700 is designed as a drain-extended NMOS field effect transistor (DE-NMOS-FET), ie as an N-channel MOS field effect transistor with a laterally extended drain region (extended drain). Illustratively serves under the gate 706 trained low-doped (N-) first body area 704 as an extension of the highly doped (N +) first terminal area 702 formed drain region.

The doping of the first connection region 702 and / or the second connection area 703 can after forming the gate area 706 respectively. In this case, the gate serves 706 clearly as a mask during the HDD doping of the connection areas 702 respectively. 703 , In this way, a self-alignment of the drain region (or the highly doped (N +) first connection region 702 ) and / or the extended drain region (ie, the low-doped (N-) first body region 704 ) can be achieved. Illustratively, the drain-extended MOS field effect transistor 700 in this case, a self-aligned device structure.

7B shows a cross-sectional view of a drain-extended MOS field effect transistor (DE-MOS-FETs) 720 according to an eighth embodiment of the invention. The DE-MOS-FET 720 is different from the one in 7A shown DE-MOS-FET 700 in that a fin structure 729 of the DE-MOS-FET 720 a heavily p-doped (P +) first connection area 722 and a heavily p-doped (P +) second port region 723 and a weakly p-doped (P) first body region 724 and a weakly n-doped (N) second body region 725 , being the first body area 724 and the second body area 725 between the first connection area 722 and the second port area 723 are formed, such that the first body area 724 between the first connection area 722 and the second body area 725 is formed and that the second body area 725 between the first body area 724 and the second port area 723 is trained.

The DE-MOS-FET 720 is illustratively designed as a drain-extended PMOS field-effect transistor (DE-PMOS-FET), ie as a P-channel MOS field-effect transistor with a laterally extended drain region (extended drain), wherein the weakly p-doped (P-) first body area 724 as an extension of the first connection area 722 (and the first electrical contact 702b ) formed drain region (by "drain" in 7B characterized) of the transistor 720 serves. The drain-extended PMOS field-effect transistor (DE-PMOS-FET) can be fabricated using similar process steps as previously described 7A has been described.

8A shows a cross-sectional view of a drain-extended MOS field effect transistor (DE-MOS-FETs) 800 according to a ninth embodiment of the invention. The DE-MOS-FET 800 is designed as a drain-extended NMOS field effect transistor (DE-NMOS-FET) and differs from that in FIG 7A shown DE-MOS-FET (or DE-NMOS-FET) 700 in that in the DE-NMOS-FET 800 a gate region electrically coupled to a gate G 806 (which gate area 806 an electrically insulating layer 806 ' and one on the electrically insulating layer 806 ' formed electrically conductive layer 106 '' ) on or over the second body area 705 and on or over a first subregion of the first body region 704 is trained. In other words, the gate 806 only on or over a first subregion of the first body region 704 formed so that a second portion (characterized by the double arrow 808 in 8A ) of length Z (measured along the longitudinal axis of the fin structure 709 ) of the first body area 704 not from the gate area 806 is covered. With the aid of the distance Z, the value for the maximum permissible drain voltage can be increased, since a voltage drop occurs along the lower-doped (N-) first body region 704 , Generally, in a DE-MOS transistor, it is necessary to limit the maximum voltage dropped across a gate oxide. With increasing value of the parameter Z (= length of the gate area 806 uncovered section of the first body area 704 ), the value for the maximum voltage can be increased. In other words, with increasing value Z, higher maximum voltage drops between gate and drain are possible. The length Z may be about 50 nm to 2000 nm.

The orientation of the drain region (or the heavily doped (N +) first connection region 702 ) and / or the extended drain region (ie, the low-doped (N-) first body region 704 ) can in the DE-NMOS-FET 800 be achieved with the help of a mask. Illustratively, the drain-extended NMOS field effect transistor 800 in this case, a mask-aligned device structure.

As with the related 7A and 7B described embodiments, the first connection area 702 and / or the second port area 703 of the DE-MOS-FET 800 be silicided. The formation of a silicide layer may occur after the gate has been formed 806 take place, with a silicidation of the non-gate 806 covered second portion of the first body area 704 For example, with the help of a mask can be blocked, as by the area 810 in 8A is shown.

8B shows a cross-sectional view of a drain-extended MOS field effect transistor (DE-MOS-FETs) 820 according to a tenth embodiment of the invention. The DE-MOS-FET 820 is different from the one in 8A shown DE-MOS-FET 800 in that the DE-MOS-FET 820 as a drain-extended PMOS field-effect transistor 820 , which is formed as a P-channel MOS field effect transistor with a laterally extended drain region. The weakly p-doped (P) first body region 724 forms an extension of the highly P-doped (P +) first terminal region 722 formed drain of the transistor 820 ,

9 shows a layout representation of an electronic component arrangement designed as a field effect transistor arrangement 900 based on a MuGFET technology according to an eleventh embodiment of the invention. The field effect transistor arrangement 900 ' has a multi-fin structure 908 with a plurality of drain-extended NMOS field-effect transistors (DE-NMOS-FETs) connected in parallel 900 on, each DE NMOS FET 900 a fin structure 909 having. Every Finn 909 has a heavily n-doped (N +) first port region 702 and a heavily n-doped (N +) second terminal region 703 on, as well as a weakly n-doped (N-) first body area 704 and a weakly p-doped (P) second body region 705 , The weakly n-doped (N) first body region 704 and the weakly p-doped (P-) second body area 705 are between the heavily n-doped (N +) first port region 702 and the heavily n-doped (N +) second port region 703 formed such that the weakly n-doped (N) first body region 704 between the heavily n-doped (N +) first port region 702 and the weakly p-doped (P) second body region 705 is formed and that further comprises the weakly p-doped (P) second body region 705 between the weakly n-doped (N) first body region 704 and the heavily n-doped (N +) second port region 703 is trained. The fin structures 909 Therefore, they have a structure similar to that in 7A respectively. 8A Fin structures shown 709 respectively. 809 ,

The first connection areas 702 the fin structures 909 are by means of a plurality of first electrical contacts 702b electrically contacted together, and the second connection areas 703 are by means of a plurality of second electrical contacts 703b contacted together electrically. The first connection areas 702 form together with the first electrical contacts 702b a drain region (with "drain" in 9 designated) of the field effect transistor arrangement 900 ' while the second connection areas 703 along with the second electrical contacts 703b a source area (with "source" in 9 designated) of the field effect transistor arrangement 900 ' form.

The multi-fin structure 908 the field effect transistor arrangement 900 ' has a gate region or gate (through the gate electrode 906 in 9 marked) on which gate 906 on or over the weakly p-doped (P) second body regions 705 and on or over a first portion of the weakly n-doped (N) first body region 704 each one of the parallel-connected DE NMOS FETs 900 (or the respective fin structures 909 ) is trained. In other words, those in the field effect transistor arrangement 900 ' trained DE-NMOS-FETs 900 a common gate 906 which clearly shows the fin structures 909 the multi-fin structure 908 is wound. The gate 906 In this case, it can be set up as it is, for example, in connection with the in 8A shown drain-extended NMOS field effect transistor 800 has been described. The gate 906 also has an electrical connection G, with which terminal G the gate 906 can be contacted electrically.

The heavily doped (N +) terminal areas 702 and 703 the field effect transistor arrangement 900 ' can be formed as mask-aligned areas. Furthermore, the first connection area 702 and / or the second port area 703 be silicided to reduce a contact resistance between the electrical contacts 702b respectively. 703b and the connection areas 702 respectively. 703 where the silicidation is in the designated area 910 (for example with the help of a mask) can be blocked.

In an alternative embodiment of the invention (not shown), the gate 906 also the respective first body area 704 every DE NMOS FET 900 (or the corresponding fin structure 909 ) cover (cf. 7A ), and the heavily doped (N +) terminal areas 702 and 703 can be trained as self-aligned areas. Furthermore, in the field effect transistor arrangement 900 ' instead of DE-NMOS-FETs, a plurality of DE-PMOS-FETs (such as those in US Pat 7B respectively. 8B shown DE-PMOS-FETs 720 respectively. 820 ) be connected in parallel.

The following are based on the 10A to 10E various process steps of a method for manufacturing an electronic component according to a twelfth embodiment of the invention described, wherein the electronic component is exemplified as a thyristor in a FD-SOI technology is formed.

10A shows the electronic component 1000 or the thyristor 1000 during a first process step of the method, in which a buried oxide layer (BOX) is deposited in a semiconductor substrate (silicon substrate) 1001 is formed. The substrate has an intrinsic conductivity such that above the buried oxide layer 1001 a layer 1007 ' with intrinsic conductivity (intrinsic layer 1007 ' ) is formed.

10B shows the thyristor 1000 during another process step of the process wherein on the intrinsic layer 1007 ' an electrically insulating layer (gate dielectric) 1006 ' , z. B. an oxide layer (gate oxide) is formed and on the electrically insulating layer 1006 ' an electrically conductive gate layer 1006 '' (eg, made of polysilicon, a metal, or other suitable electrically conductive material).

10C shows the thyristor 1000 during another process step of the process, wherein the material of the electrically insulating layer 1006 ' and the electrically conductive layer 1006 '' is removed, such that a plurality of separate gate areas 1006 on or above the intrinsic layer 1007 ' be formed. In other words, by structuring the electrical insulating layer 1006 ' and the electrically conductive layer 1006 '' (for example, using a lithography method and an etching method) a plurality of separate gate regions 1006 formed, with the gate areas 1006 on or over a subarea 1007 the intrinsic layer 1007 ' be formed, which subarea 1007 vividly as a body area 1007 of the thyristor 1000 serves.

The gate areas 1006 are through intermediate areas 1011 separated from each other, in which intermediate areas 1011 no gate material is formed. Viewed vividly remain sections of the intrinsic layer 1007 ' free.

The separate gate areas 1006 can be formed so that two adjacent gate areas 1006 a distance X, which may for example be less than the minimum feature size F of the technology used. The distance X may be some 10 nm, for example 15 nm to 60 nm.

Furthermore, the separate gate areas 1006 be formed so that one or more of the gate areas 1006 has a length L, which length L may be smaller than the minimum feature size F of the technology used, for example. The length L of a gate area 1006 may be 5 nm to 200 nm, for example a few 10 nm, for example 15 nm to 60 nm.

The gate areas are clear 1006 along with the intermediate areas 1011 a slotted gate mask (slotted gate mask) 1017 or a slotted gate 1017 , In the embodiment shown, the gate mask 1017 seven from each other through spaces 1011 separate gate areas 1006 on, being a central gate area 1006 may have a length of typically greater than 2 L, while the other six gate regions have the length L. Furthermore, each have two adjacent gate areas 1006 a distance X on.

In the 10C shown structure of the slotted gate mask 1017 ie the number, size and spacing of the gate areas 1006 or interspaces 1011 , is exemplary. Alternatively, the gate mask 1017 have a different slot structure.

10D shows the thyristor 1000 during another process step of the process, wherein the free subregions (ie, below the intermediate regions 1011 trained subareas) of the (intrinsic) body area 1007 doped by introducing dopant atoms. The introduction of the dopants is effected by the between the separate gate regions 1006 trained spaces 1011 therethrough. In the exemplary embodiment shown, doping takes place with the aid of an HDD implantation method, wherein a plurality of first weakly n-doped (N) partial regions 1004a by N + implantation (by "N + implant" in 10D characterized) in a one (hereinafter formed, cf. 10E ) first connection area 1002 adjacent first half of the (intrinsic) body area 1007 is formed, and a plurality of second weakly p-doped (P) portions 1005a by P + implantation (by "P + implant" in 10D characterized) in a one (hereinafter formed, cf. 10E ) second connection area 1003 adjacent second half of the (intrinsic) body area 1007 is formed.

Illustratively, the doping of the intrinsic layer takes place 1007 ' or in the intrinsic layer 1007 ' trained (intrinsic) body area 1007 (more precisely the first sections 1004a and the second subareas 1005a ) through the slotted gate mask 1017 through, with the doping just below the gate regions 1006 is blocked. In other words, the (intrinsic) body area becomes 1007 only locally doped (below the intermediate areas 1011 ), or the dopant atoms are only locally (in the exposed portions 1004a respectively. 1005a of the (intrinsic) body area 1007 ) implanted.

Due to one in the (intrinsic) body area 1007 forming dopant concentration gradient between the doped portions 1004a respectively. 1005a and the adjacent undoped portions of the (intrinsic) body region 1007 It can lead to an outdiffusion of the (intrinsic) body area 1007 introduced dopant atoms come. In other words, the dopant profiles of the doped portions 1004a respectively. 1005a also in the masked subregions below the gate areas 1006 expand. By means of the lateral outdiffusion of the dopant atoms, a dilute weakly n-doped first body subregion can be clearly illustrated 1004 and a diluted weakly p-doped second body portion 1005 in the intrinsic body area 1007 be formed next to each other. The diluted weakly doped body parts 1004 respectively. 1005 are also called "Diluted Body Regions". The first part of the body is clearly illustrated 1004 a patterned or diluted N-implantation, and the second body portion 1005 has a patterned or diluted P-implantation.

10E shows the thyristor 1000 during another process step of the process, wherein in the intrinsic layer 1007 a first connection area 1002 and a second connection area 1003 be formed. The first connection area 1002 is considered a strongly p-doped (P +) region 1002 formed, and the second connection area 1003 is considered a heavily n-doped (N +) region educated. In the exemplary embodiment shown, the doping of the first connection region takes place 1002 and the second port area 1003 each using an HDD implantation procedure (by "P + implant" or "N + implant" in 10E characterized), wherein the gate areas 1006 can serve as a mask during doping or implanting the dopant atoms.

The dopant concentration in the first port region 1002 and / or in the second connection area 1003 may be greater than 10 ²⁰ cm ^-3 .

10F shows the thyristor 1000 during another process step of the method, wherein on the first connection area 1002 a first electrical contact 1002b is formed, and continue to be on the second connection area 1003 a second electrical contact 1003b is formed. The first connection area 1002 can by means of the first electrical contact 1002b be contacted electrically and illustratively forms an anode of the thyristor 1000 (by "anode" in 10F in). Accordingly, the second connection area 1003 by means of the second electrical contact 1003b electrically contacted and illustratively forms a cathode of the thyristor 1000 (by "Cathode" in 10F in).

The gate areas 1006 can be used as floating gate areas 1006 (electrically floating gates or floating gates) are formed. Alternatively, one or more of the gate regions 1006 electrically contacted (for example by means of one or more electrical gate connections, see. 11 ) and, for example, as control gates for an improved triggering of the thyristor 1000 be used.

11 shows a cross-sectional view of a thyristor 1100 , which is produced by means of a method for producing an electronic component according to a thirteenth embodiment of the invention. The method initially has essentially the same process steps as in connection with the 10A to 10C described in contrast to the in 10C shown thyristor structure 1000 at the in 11 shown thyristor 1100 a plurality of separate gate areas 1106 is formed so that all gate areas 1106 have approximately the same length L, and that in each case two adjacent gate areas 1106 have a distance X '. The values for the length L 'and the distance X' can be of the same order of magnitude as in connection with 10C for the length L or the distance X has been described. The gate areas 1106 are through intermediate areas 1111 separated from each other.

In the method of manufacturing the thyristor 1100 be in one to the in 10D Process step shown analog process step, the exposed sections (ie, the below the intermediate areas 1111 trained parts) of the intrinsic body area 1007 doped by introducing dopant atoms, wherein the introduction of the dopants by the between the separate gate regions 1106 trained spaces 1111 through. Unlike the in 10D In accordance with the exemplary embodiment of the method described here, doping is carried out by means of a halo-implantation method, wherein the plurality of first weakly n-doped (N) partial regions 1004a by means of an N-halo implantation (by "N halo implant" in 11 marked) in the first connection area 1002 adjacent first half of the (intrinsic) body area 1007 is formed, and the plurality of second weakly p-doped (P) portions 1005a by means of a P-halo implantation (by "P halo implant" in FIG 11 indicated) in the second connection area 1003 adjacent second half of the (intrinsic) body area 1007 is formed.

Illustratively, the doping of the intrinsic body region takes place 1007 or the subareas 1004a and 1005a by introducing halo implants through a slotted gate mask 1117 through, which, as related to above 10D described, a diluted weakly n-doped first body portion ("diluted body region") 1004 and a diluted weakly p-doped second body portion 1005 in the intrinsic body area 1007 of the thyristor 1100 be formed next to each other.

The introduction of the halo implants or the halo implantation can take place at an implantation angle of for example 5 ° to 80 °. Illustratively, the dopant atoms strike the surface of the body region obliquely 1007 , Due to a shading effect of the gate areas 1106 or the gate stack during an oblique implantation, using a halo-implantation method is particularly effective for forming the thinned body portions 1004 respectively. 1005 ,

In another, to which in 10E shown process step analog, process step of the method is by means of a P + implantation (by "P + implant" in 11 characterized) the heavily p-doped (P +) first terminal region 1002 formed by N + implantation (by "N + implant" in 11 ) becomes the heavily n-doped (N +) second terminal region 1003 educated.

In another process step of the procedure is on the first connection area 1002 a first electrical contact 1002b formed, and on the second connection area 1003 becomes a second electrical contact 1003b educated. The first connection area 1002 can by means of the first electrical contact 1002b be contacted electrically and illustratively forms an anode of the thyristor 1100 (by "anode" in 11 in). Accordingly, the second connection area 1003 by means of the second electrical contact 1003b be contacted electrically and illustratively forms a cathode of the thyristor (by "Cathode" in 11 in).

In another process step of the method, the first weakly n-doped first body portion above the thinned 1004 of the thyristor 1100 trained gate areas 1006 electrically contacted by means of a first electrical gate terminal G1, and the over the weakly weakly p-doped second body portion 1005 of the thyristor 110 trained gate areas 1006 are electrically contacted together by means of a second electrical gate terminal G2. By applying a first electrical potential to the over the diluted weakly n-doped first body portion 1004 trained gate areas 1106 and / or by applying a second electrical potential to the over the diluted weakly p-doped second body portion 1005 trained gate areas 1106 may be the surface potential of the diluted weakly n-doped body region 1104 and / or the surface potential of the diluted weakly p-doped body region 1105 be controlled, which, for example, an improved triggering of the thyristor 1100 can be achieved.

The following are based on the 12A to 12D various process steps of a method for producing an electronic component according to a fourteenth embodiment of the invention described, wherein the electronic component is exemplified as a drain-extended MOS field effect transistor (DE-MOS-FET) is formed in a MuGFET technology.

12A shows the electronic component 1200 or the drain-extendend MOS field-effect transistor (DE-MOS-FET) 1200 during a first process step of the method, wherein a buried oxide (buried oxide) layer is deposited in a semiconductor substrate (eg a silicon substrate, not shown) 1201 is formed. The substrate may have an intrinsic conductivity. Alternatively, the substrate may be in the form of a weakly p-doped substrate, e.g. B. be formed with a dopant concentration of less than about 10 ¹⁶ cm ^-3 . Above the buried oxide layer 1201 therefore becomes a layer 1207 ' trained, which layer 1207 ' may have intrinsic conductivity or alternatively may be weakly p-doped (P-) (by "i (P-)" in FIG 12A in). In the following description, it is assumed that the layer 1207 ' is formed as an intrinsic layer. The layer 1207 ' is structured so that it has a fin structure or web structure 1209 having.

12B shows the DE-MOS-FET 1200 during another process step of the process wherein on the intrinsic layer 1207 ' or the fin structure 1209 an electrically insulating layer (gate dielectric) 1206 ' , z. B. an oxide layer (gate oxide) is formed and on the electrically insulating layer 1206 ' an electrically conductive gate layer 1206 '' (eg, made of polysilicon, a metal, or other suitable electrically conductive material).

12C shows the DE-MOS-FET 1200 during another process step of the process, wherein the material of the electrically insulating layer 1206 ' and the electrically conductive gate layer 1206 '' is removed, such that a plurality of separate gate areas 1206a respectively. 1206b on or above the intrinsic layer 1207 ' be formed. In other words, by structuring the electrical insulating layer 1206 ' and the electrically conductive layer 1206 '' (for example, using a lithography method and an etching method) a plurality of separate gate regions 1206a respectively. 1206b formed, with the gate areas 1206a respectively. 1206b on or over a subarea 1207 the intrinsic layer 1207 ' be formed, which subarea 1207 vividly as a body area 1207 of the DE-MOS-FET 1200 serves. According to the embodiment shown, a first gate region 1206a formed, which has a length L '', and a plurality of second gate regions 1206b which second gate regions have a length L '''.

The gate areas 1206a respectively. 1206b are through intermediate areas 1211 separated from each other, in which intermediate areas 1211 no gate material is formed. The removal of the gate material clearly shows subregions of the (intrinsic) layer 1207 ' exposed, which of the electrically insulating layer 1206 ' or the electrically conductive layer 1206 '' were covered.

The separate gate areas 1206a . 1206b can be formed so that two adjacent second gate areas 1206b and / or the first gate area 1206a and one to the first gate area 1206a adjacent second gate area 1206b a distance X '', which distance For example, X "may be less than the minimum feature size F of the technology used. The distance X "may be some 10 nm, for example 15 nm to 60 nm.

The first gate area 1206a may have a length L "which is common for the particular technology used, for example minimum feature size F or greater (eg 30 nm to 600 nm).

Furthermore, the second gate regions 1206b be formed so that one or more of the second gate areas 1206b has a length L ''', which length L''', for example, may be smaller than the minimum feature size F of the technology used. The length L '' of a second gate area 1206b may be about 5 nm to 200 nm, for example a few 10 nm, for example 15 nm to 60 nm.

Illustrate the first gate area 1206a and the second gate areas 1206b along with the intermediate areas 1211 a slotted gate mask (slotted gate mask) 1217 ,

In the 12C shown structure of the slotted gate mask 1217 ie the number, size and spacing of the gate areas 1206a . 1206b or the spaces between them 1211 , is exemplary. Alternatively, the gate mask 1217 have a different slot structure.

12D shows the DE-MOS-FET 1200 during another process step of the process, wherein the exposed portions (ie, below the intermediate regions 1211 trained parts) of the intrinsic body area 1207 doped by introducing dopant atoms. The introduction of the dopants is effected by the between the separate gate regions 1206a respectively. 1206b trained spaces 1211 therethrough. In the embodiment shown, the doping is carried out by means of a halo-implantation method, wherein a plurality of weakly n-doped (N) subregions 1204a by means of an N-halo implantation (by "N halo implant" in 12D marked) in one, a first connection area 1202 (not shown, cf. 12E ) adjacent portion of the body area 1207 is formed.

Illustratively, the doping of the body area 1207 (more precisely, the sections 1204a ) through the slotted gate mask 1217 through, wherein the doping below the first gate region 1206a and below the second gate areas 1206b is blocked. In other words, the body area 1207 only locally doped (below the intermediate areas 1211 ), or the dopant atoms are only locally (in the exposed portions 1204a of the body area 1207 ) implanted.

Because of a in the body area 1207 forming dopant concentration gradient between the doped portions 1204a of the body area 1207 and the adjacent undoped portions of the body area 1207 There may be an out-diffusion in the body area 1207 introduced dopant atoms come. In other words, the dopant profiles of the doped portions 1204a into the masked portions below the second gate areas 1206b expand. By means of the lateral outdiffusion of the dopant atoms, a dilute, weakly n-doped first body subregion is formed 1204 ("Diluted Body Region") in the body area 1207 educated. The diluted weakly n-doped first body subregion 1204 clearly has a patterned or diluted N-implantation and serves as an extended drain area 1204 of the DE-MOS-FET 1200 ,

Below the first gate area 1206a an intrinsic (or weakly p-doped) second body subregion remains 1205 in the body area 1207 , which second body section 1205 vividly as a channel area 1205 of the DE-MOS-FET 1200 serves.

According to the in 12D In the embodiment shown, the introduction of halo implants takes place only in the region of the slotted gate mask 1217 (as indicated by "N halo implant"). Alternatively, a halo implantation over the entire device or DE-MOS-FET 1200 In this case, halo implants also take place in the right and left of the body area 1207 formed subregions of the intrinsic layer 1207 ' (ie in the terminal areas of the DE-MOS-FETs 1200 Apprenticeship areas of the intrinsic layer 1207 ' , see. 12E ) can be introduced.

12E shows the DE-MOS-FET 1200 during another process step of the process wherein in the intrinsic (or weakly p-doped) layer 1207 ' by introducing dopant atoms a heavily n-doped (N +) first terminal region 1202 and a heavily n-doped (N +) second port region 1203 be formed. The doping of the first connection region 1202 and the second port area 1203 is performed by means of an HDD implantation procedure (Highly Doped Drain) or a source / drain implantation procedure (by "N + implant" in 12E characterized), wherein the first gate area 1206a and / or the second gate regions 1206b can serve as a mask. The dopant concentration in the first port region 1202 and / or in the second connection area 1203 may be more than 10 ²⁰ cm ^-3 .

12F shows the DE-MOS-FET 1200 during another process step of the method, wherein silicidation of the first port region 1202 and the second port area 1203 takes place, such that on the first connection area 1202 (or in an upper portion of the first connection area 1202 ) a first silicide layer 1202a is formed and that on the second connection area 1203 (or in an upper portion of the second connection area 1203 ) a second silicide layer 1203a is formed. Further, on the slotted gate 1217 (ie on the first gate area 1206a and on the second gate areas 1206b ) as well as on or in the weakly n-doped subareas 1204a , which weakly n-doped subregions 1204a below the intermediate areas 1211 are formed, a third silicide layer 1207a educated.

Continue to be on the first port area 1202 trained first silicide layer 1202a a first electrical contact 1202b formed, and on the on the second connection area 1203 formed second silicide layer 1203a becomes a second electrical contact 1203b educated. The heavily n-doped (N +) first port region 1202 can by means of the first electrical contact 1202b be electrically contacted and illustratively forms a drain region of the DE-MOS-FETs 1200 (by "drain" in 12F in). Accordingly, the second connection area 1203 by means of the second electrical contact 1203b be electrically contacted and illustratively forms a source region of the DE-MOS-FETs 1200 (by "Source" in 12F in).

The first gate area 1206a is electrically contacted by means of an electrical gate terminal G and serves illustratively as a gate 1206a of the DE-MOS-FET 1200 ,

The DE-MOS-FET 1200 has a heavily n-doped first port region 1202 (Drain), a heavily n-doped second port region 1203 (Source), an intrinsic (or weakly p-doped) channel region 1205 , a gate 1206a as well as an extended drain area 1204 on. The DE-MOS-FET 1200 is therefore illustrative as an N-channel drain-extended MOS field effect transistor 1200 or DE-NMOS-FET 1200 educated.

13 shows an N-channel drain-extended MOS field effect transistor 1300 (DE-NMOS-FET 1300 ), which can be produced by a method of manufacturing an electronic component according to a fifteenth embodiment of the invention.

The method for producing the in 13 shown DE-NMOS-FETs 1300 is different from the one related to the 12A to 12F described method in that the training of the third silicide layer 1207a in the DE-NMOS-FET 1300 is prevented. In other words, silicidation of the extended drain region becomes clear 1204 between the gate areas 1206a . 1206b or a silicidation below the intermediate areas 1211 trained doped subareas 1204a prevents or blocks, and conveniently silicidation of the gates is also blocked. In 13 is schematically the outline 1310 of the silicide-blocked region.

The blocking of the silicidation can take place with the aid of a mask. Furthermore, a silicidation of the extended drain region 1204 be blocked, as in or below the very narrow openings 1211 the gate mask 1217 no silicide is formed (for example due to material properties, grain size, etc.). In other words, the spaces between 1211 be so narrow that it does not form silicide.

This causes a silicidation of the extended drain region 1204 is blocked, an undesirable electrical current flow near the surface can be avoided.

14 shows an N-channel drain-extended MOS field effect transistor 1400 (DE-NMOS-FET 1400 ), which can be produced by a method for manufacturing an electronic component according to a sixteenth embodiment of the invention.

The method for producing the in 14 shown DE-NMOS-FETs 1400 is different from the one related to the 12A to 12F described method in that for forming the weakly n-doped portions 1204a of the extended drain area 1204 Both a halo-implantation method and an HDD implantation method (or source / drain implantation method) may be used. In other words, in the exemplary embodiment shown, both N-halo implants (not shown, cf. 12D ) as well as N + implants (in 14 representative of "N + implant") for forming the weakly n-doped regions 1204a used.

15 shows an N-channel drain-extended MOS field effect transistor 1500 (DE-NMOS-FET 1500 ), which can be produced by a method for manufacturing an electronic component according to a seventeenth embodiment of the invention.

The method for producing the in 15 shown DE-NMOS-FETs 1500 is different from the related 14 described method in that the forming of the third silicide layer 1207a in the DE-NMOS-FET 1500 is prevented. In other words, a silicidation of the extended drain region 1204 or below the intermediate areas 1211 trained doped subareas 1204a prevents or blocks. In 15 is schematically the outline 1310 of the silicide-blocked region. The blocking of the silicidation can take place with the aid of a mask. This causes a silicidation of the extended drain region 1204 is blocked, an undesirable electrical current flow near the surface can be avoided.

In the 12F to 15 shown drain-extended MOS field effect transistors are formed as N-channel drain-extended MOS field effect transistors (DE-NMOS-FETs). In alternative embodiments (not shown) of a method for producing an electronic component, P-channel drain-extended MOS field-effect transistors (DE-PMOS-FETs) can also be formed in an analogous manner. In general, a method of manufacturing an electronic device can be used for both NMOS structures and PMOS structures.

Furthermore, all of the aforementioned embodiments of the invention realized in a MugFET technology can alternatively also be realized in a silicon-on-insulator (SOI) technology.

• [1] A. Amerasekera, C. Duvvury, ”ESD in Silicon Integrated Circuits”, John Wiley & Sons, Chicester, England, 2. Auflage, 2002, Seiten 98 bis 101.
• [2] O. Marichal, G. Wybo, B. Van Camp, P. Vanysacker, B. Keppens, ”SCR based ESD protection in nanometer SOI technologies”, EOS/ESD Symposium 2005.
• [3] US 6,720,619 B1
• [4] J. C. Mitros et al., ”High-Voltage Drain Extended MOS Transistors for 0.18-μm Logic CMOS Process”, IEEE Transactions on Electron Devices, Vol. 48, No. 8, August 2001.
• [5] US 2004/0217433 A1

This document cites the following publications:

• [1] A. Amerasekera, C. Duvvury, "ESD in Silicon Integrated Circuits," John Wiley & Sons, Chicester, England, 2nd Edition, 2002, pages 98-101.
• [2] O. Marichal, G. Wybo, B. Van Camp, P. Vanysacker, B. Keppens, "SCR based ESD protection in nanometer SOI technologies", EOS / ESD Symposium 2005.
• [3] US 6,720,619 B1
• [4] JC Mitros et al., "High Voltage Drain Extended MOS Transistors for 0.18-μm Logic CMOS Process", IEEE Transactions on Electron Devices, Vol. 8, August 2001.
• [5] US 2004/0217433 A1

LIST OF REFERENCE NUMBERS

G, G1, G2

electrical gate connections

100

SCR

101

buried oxide layer

102

first contact area

102

first silicide layer

102b

first electrical contact

103

second contact area

103a

second silicide layer

103b

second electrical contact

104

first body area

105

second body area

200

FinFET

201

first insulating layer

201 '

second insulating layer

206

gate

206a

Gate dielectric

209

fin

300

Drain-extended NMOS field-effect transistor

301

substratum

302

Drain region

303

Source region

306

gate

322

N-well region

323

P-well region

330

grave insulation

400

MOS field effect transistor

401

Substrate / well region

402

first source / drain region

402a

first silicide layer

402b

first electrical contact

403

second source / drain region

403a

second silicide layer

403b

second electrical contact

404

Extension area

405

Halo implantation area

406

gate

406a

Gate dielectric

413

Photo-Mask

415

Photo-Mask

416

spacer

500

thyristor

501

buried oxide layer

502

first connection area

502a

first silicide layer

502b

first electrical contact

503

second connection area

503a

second silicide layer

503b

second electrical contact

504

first body area

505

second body area

506

Gate region

506 '

electrically insulating layer

506 ''

electrically conductive layer

506a

third silicide layer

512, 513, 514, 515

photomasks

520

thyristor

600

thyristor

604

first body area

605

second body area

606a

first gate area

606a '

first electrically insulating layer

606a ''

first electrically conductive layer

606b

second gate area

606b '

second electrically insulating layer

606b ''

second electrically conductive layer

607

third body area

620

thyristor

627

third body area

640

thyristor

647

third body area

648

fourth body area

660

thyristor

678

third body area

700

Drain-extended NMOS field-effect transistor

701

buried oxide layer

702

first connection area

702b

first electrical contact

703

second connection area

703b

second electrical contact

704

first body area

705

second body area

706

Gate region

706 '

electrically insulating layer

706 ''

electrically conductive layer

709

Fin structure

720

Drain-extended PMOS field effect transistor

722

first connection area

723

second connection area

724

first body area

725

second body area

729

Fin structure

800

Drain-extended NMOS field-effect transistor

806

Gate region

808

distance

810

Silicide blocking

820

Drain-extended PMOS field effect transistor

900

Drain-extended NMOS field-effect transistor

900 '

Field effect transistor arrangement

906

Gate region

908

Multi-fin structure

909

Fin structure

910

Silicide blocking

1000

thyristor

1001

buried oxide layer

1002

first connection area

1002b

first electrical contact

1003

second connection area

1003b

second electrical contact

1004

first body section

1004a

first doped subarea

1005

second body section

1005a

second doped subregion

1006

Gate region

1006 '

electrically insulating layer

1006 ''

electrically conductive layer

1007

Body region

1007 '

intrinsic layer

1011

intermediate area

1017

Gate mask

1100

thyristor

1106

Gate region

1111

intermediate area

1117

Gate mask

1200

Drain extended MOS field effect transistor

1201

buried oxide layer

1202

first connection area

1202a

first silicide layer

1202b

first electrical contact

1203

second connection area

1203a

second silicide layer

1203b

second electrical contact

1204

first body section

1204a

doped subregion

1205

second body section

1206

Gate region

1206 '

electrically insulating layer

1206 ''

electrically conductive layer

1206a

first gate area

1206b

second gate area

1207

Body region

1207 '

intrinsic layer

1207a

third silicide layer

1209

Fin structure

1211

intermediate area

1217

Gate mask

1300

Drain extended MOS field effect transistor

1310

Silicide blocking

1400

Drain extended MOS field effect transistor

1500

Drain extended MOS field effect transistor

Claims (14)

Method for producing a drain-extended MOS field-effect transistor, in which A silicon-on-insulator structure is formed on or above a substrate; A first doped connection region and a second doped connection region are formed in the silicon-on-insulator structure, wherein the first connection region and the second connection region have a first conductivity type and are connected to one of the first connection regions Region and the second terminal region formed electrically insulating layer of the silicon-on-insulator structure adjacent; A first body region and a second body region are formed between the first connection region and the second connection region, wherein the first body region is formed between the first connection region and the second body region, wherein the second body region is formed between the first body region and the second attachment region, and wherein the first body region and the second body region adjoin the electrically insulating layer of the silicon-on-insulator structure; The first body region and the second body region are doped by introducing dopant atoms, such that the first body region has the first conductivity type, and the second body region has a second conductivity type opposite to the first conductivity type; A gate region is formed on or above the second body region and on or over at least one subregion of the first body region. Method according to claim 1, wherein the doping of the first body region and / or the second body region takes place by means of a Vt implantation method. The method of claim 1, wherein the first port region, the first body region, and the second port region are n-doped, and wherein the second body region is p-doped, such that a drain-extended NMOS field effect transistor is formed. The method of claim 1, wherein the first port region, the first body region, and the second port region are p-doped, and wherein the second body region is n-doped, such that a drain-extended PMOS field effect transistor is formed. Method according to one of claims 1 to 4, wherein the gate region is formed so that a portion of the first body region remains free of the gate region. The method of claim 5, wherein the length of the portion free of the gate region is 50 nm to 2000 nm. Method according to one of claims 1 to 6, wherein one or more of the following areas are silicided: • the first connection area; • the second connection area; • the gate area. The method of claim 7, wherein a mask is used, with the aid of a silicidation of the gate region-free portion of the first body region is blocked. Drain Extended MOS Field Effect Transistor ( 700 . 720 . 800 . 820 ), Having a silicon-on-insulator structure formed on or above a substrate and comprising: A first doped terminal area ( 702 . 722 ) and a second doped terminal area ( 703 . 723 ), the first connection area ( 702 . 722 ) and the second connection area ( 703 . 723 ) have a first conductivity type and to a below the first connection region ( 702 . 722 ) and the second connection area ( 703 . 723 ) formed electrically insulating layer ( 701 ) adjoin the silicon-on-insulator structure; - a first doped body area ( 704 . 724 ) and a second doped body region ( 705 . 725 ), which between the first connection area ( 702 . 722 ) and the second connection area ( 703 . 723 ), wherein the first body region ( 704 . 724 ) between the first connection area ( 702 . 722 ) and the second body area ( 705 . 725 ), wherein the second body region ( 705 . 725 ) between the first body area ( 704 . 724 ) and the second connection area ( 703 . 723 ), wherein the first body region ( 704 . 724 ) and the second body area ( 705 . 725 ) to the electrically insulating layer ( 701 ) of the silicon-on-insulator structure, and wherein the first body region ( 704 . 724 ) has the first conductivity type and the second body region ( 705 . 725 ) has a second conductivity type opposite to the first conductivity type; • with a gate area ( 706 . 806 ), which on or above the second body area ( 705 . 725 ) and on or over at least a portion of the first body region ( 704 . 724 ) is trained. Drain Extended MOS Field Effect Transistor ( 700 . 800 ) according to claim 9, wherein the first connection area ( 702 . 722 ), the first body area ( 704 . 724 ) and the second connection area ( 703 . 723 ) are n-doped, and wherein the second body region ( 705 . 725 ) is p-doped, so that the drain-extended MOS field-effect transistor ( 700 . 800 ) is formed as a drain-extended NMOS field effect transistor. Drain Extended MOS Field Effect Transistor ( 720 . 820 ) according to one of claims 9 or 10, wherein the first connection region ( 702 . 722 ), the first body area ( 704 . 724 ) and the second connection area ( 703 . 723 ) are p-doped, and wherein the second body region ( 705 . 725 ) n-doped, so that the drain-extended MOS field-effect transistor ( 720 . 820 ) is formed as a drain-extended PMOS field effect transistor. Drain Extended MOS Field Effect Transistor ( 800 . 820 ) according to one of claims 9 to 11, wherein the gate region ( 806 ) is designed such that a subregion of the first body region ( 704 . 724 ) from the gate area ( 806 ) remains free. Drain Extended MOS Field Effect Transistor ( 800 . 820 ) according to claim 12, wherein the length of the gate region ( 806 ) free subregion is 50 nm to 2000 nm. Electronic component arrangement, having a plurality of drain-extended MOS field-effect transistors ( 900 ) according to one of claims 9 to 13.

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