WO2012033299A2 - 반도체 소자의 제조 방법 - Google Patents
반도체 소자의 제조 방법 Download PDFInfo
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- WO2012033299A2 WO2012033299A2 PCT/KR2011/006389 KR2011006389W WO2012033299A2 WO 2012033299 A2 WO2012033299 A2 WO 2012033299A2 KR 2011006389 W KR2011006389 W KR 2011006389W WO 2012033299 A2 WO2012033299 A2 WO 2012033299A2
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- H10P14/40—
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/06—Metal silicides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0227—Pretreatment of the material to be coated by cleaning or etching
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/04—Coating on selected surface areas, e.g. using masks
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/24—Deposition of silicon only
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/30—EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/0411—Manufacture or treatment of FETs having insulated gates [IGFET] of FETs having floating gates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/0413—Manufacture or treatment of FETs having insulated gates [IGFET] of FETs having charge-trapping gate insulators, e.g. MNOS transistors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/031—Manufacture or treatment of data-storage electrodes
- H10D64/035—Manufacture or treatment of data-storage electrodes comprising conductor-insulator-conductor-insulator-semiconductor structures
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/031—Manufacture or treatment of data-storage electrodes
- H10D64/037—Manufacture or treatment of data-storage electrodes comprising charge-trapping insulators
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/667—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes the conductor comprising a layer of alloy material, compound material or organic material contacting the insulator, e.g. TiN workfunction layers
- H10D64/668—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes the conductor comprising a layer of alloy material, compound material or organic material contacting the insulator, e.g. TiN workfunction layers the layer being a silicide, e.g. TiSi2
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/01—Manufacture or treatment
- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/0165—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs the components including complementary IGFETs, e.g. CMOS devices
- H10D84/0172—Manufacturing their gate conductors
- H10D84/0174—Manufacturing their gate conductors the gate conductors being silicided
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/01—Manufacture or treatment
- H10D84/02—Manufacture or treatment characterised by using material-based technologies
- H10D84/03—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology
- H10D84/038—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology using silicon technology, e.g. SiGe
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- H10P14/412—
Definitions
- the present invention relates to a method for manufacturing a semiconductor device, and more particularly, to a method for manufacturing a semiconductor device including a metal silicide layer.
- semiconductor devices which are core components of electronic devices, are also required to be highly integrated and high performance.
- semiconductor devices which are core components of electronic devices, are also required to be highly integrated and high performance.
- the present invention has been made in an effort to solve the above-mentioned problems and to provide a method of manufacturing a semiconductor device including a metal silicide layer.
- a method of manufacturing a semiconductor device may include forming an insulating layer on a substrate on which a polysilicon pattern is formed to expose the polysilicon pattern, and selectively on the exposed polysilicon pattern. Forming a silicon seed layer on the substrate, forming a metal layer on the substrate on which the silicon seed layer is formed, and heat treating the substrate on which the metal layer is formed to form a metal silicide layer.
- the method may further include pre-treating the substrate on which the insulating layer is formed by using a solution including a hydrogen group.
- hydrogen atoms may be bonded to the insulating layer and the polysilicon pattern exposed on the substrate.
- the solution including the hydrogen group may be one or more solutions selected from the group consisting of HF solution, diluted hydrogen fluoride (DHF) solution, and BOE (Buffered Oxide Etchant) solution.
- the forming of the insulating layer may include forming a polysilicon pattern on the substrate, forming an insulating material on the substrate to cover the polysilicon pattern, and partially removing the insulating material to expose the polysilicon pattern. It may include the step of removing.
- At least one source gas selected from the group including SiH 4, Si 2 H 6, Si 3 H 8, and Si 4 H 10 may be supplied into the chamber in which the substrate is loaded.
- the temperature of the substrate may be maintained at 500 ° C to 650 ° C.
- the pressure in the chamber may be maintained at 5 Torr to 20 Torr.
- the metal layer may be one or more metals selected from the group comprising Ti, Co, and Ni.
- the method may further include removing the remaining metal layer.
- the insulating layer may be made of oxide or nitride.
- the forming of the silicon seed layer may selectively replace only hydrogen atoms bonded on the polysilicon pattern among the hydrogen atoms bonded on the insulating layer and the polysilicon pattern.
- Forming the silicon seed layer may selectively form the silicon seed layer on the exposed polysilicon pattern using a difference in bonding energy between hydrogen and oxygen or hydrogen and nitrogen and bonding energy between hydrogen and silicon. can do.
- the method of manufacturing a semiconductor device according to an embodiment of the present invention can minimize the loss of voltage, so that the semiconductor device can have stable characteristics.
- the semiconductor device when the semiconductor device is a nonvolatile memory device including a flash cell, the semiconductor device may have a stable data program / erase characteristic by supplying a voltage having a minimum power drop to the flash cells.
- the metal silicide layer may be formed to cover more of the top surface of the polysilicon pattern, thereby further minimizing the power drop that may occur in the conductive pattern formed by the metal silicide layer and the polysilicon pattern.
- FIG. 1 is a flowchart illustrating a method of manufacturing a semiconductor device according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view illustrating a semiconductor manufacturing apparatus for manufacturing a semiconductor device according to an embodiment of the present invention.
- FIG 3 is a cross-sectional view illustrating a step of forming a polysilicon pattern according to an exemplary embodiment of the present invention.
- FIG. 4 is a cross-sectional view illustrating a step of forming an insulating material according to an embodiment of the present invention.
- FIG. 5 is a cross-sectional view illustrating a step of forming an insulating layer according to an embodiment of the present invention.
- FIG. 6 is a cross-sectional view illustrating a step of pretreating a substrate on which an insulating layer is formed according to an embodiment of the present invention.
- FIG. 7 is a conceptual diagram illustrating a cross-section of a substrate on which an insulating layer is formed, according to an embodiment of the present invention.
- FIG. 8 is a cross-sectional view illustrating a step of forming a silicon seed layer according to an embodiment of the present invention.
- FIG. 9 is a conceptual diagram illustrating a cross section in which a silicon seed layer is formed according to an embodiment of the present invention.
- FIG. 10 is a cross-sectional view illustrating a step of forming a metal layer according to an embodiment of the present invention.
- FIG. 11 is a cross-sectional view illustrating a step of forming a metal silicide layer according to an embodiment of the present invention.
- FIG. 12 is a cross-sectional view illustrating a step of removing a remaining metal layer according to an embodiment of the present invention.
- FIG. 1 is a flowchart illustrating a method of manufacturing a semiconductor device according to an embodiment of the present invention.
- the substrate may further include individual components for forming a semiconductor device.
- the substrate may include a well region, an active region defined by an isolation layer, and the like.
- a polysilicon pattern is formed on the substrate (S110). Under the polysilicon pattern, other layers may be formed to form a pattern together. That is, a multi-layered pattern including polysilicon may be formed on the substrate.
- the multi-layered pattern may include, for example, a tunneling insulating layer pattern, a charge storage layer pattern, a blocking insulating layer pattern, and a polysilicon pattern.
- a tunneling insulating layer, a charge storage layer, a blocking insulating layer, and a polysilicon layer may be sequentially stacked on the substrate, and then a photolithography process and an etching process may be performed.
- An insulating layer is formed on the substrate to expose the polysilicon pattern (S120).
- an insulating material covering the polysilicon pattern is formed, and then the insulating material is partially removed to expose the polysilicon pattern.
- the insulating material may be left so that other layers other than the polysilicon pattern, that is, the substrate, the blocking insulating layer pattern, and the like are not exposed.
- the substrate on which the insulating layer exposing the polysilicon pattern is formed is pretreated with a solution containing a hydrogen group (S130).
- the solution including the hydrogen group is an HF solution, a diluted hydrogen fluoride (DHF) solution, or a BOE Oxide Etchant) solution.
- DHF diluted hydrogen fluoride
- BOE Oxide Etchant a hydrogen atom may be bonded on the polysilicon pattern and the insulating layer.
- a silicon seed layer is formed on the polysilicon pattern (S140).
- S140 silicon seed layer
- only hydrogen atoms bonded on the polysilicon pattern may be selectively replaced with silicon atoms.
- a metal layer is formed on the substrate on which the silicon seed layer is formed (S150).
- the metal layer may for example consist of a refractory metal.
- the substrate on which the metal layer is formed is heat-treated to form the metal silicide layer by reacting the metal layer with the silicon seed layer and the polysilicon pattern (S160). Thereafter, the remaining metal layer reacted with the metal silicide layer is removed (S170). As a result, the metal silicide layer is formed on the polysilicon pattern.
- the metal silicide layer may be further densified (S180).
- FIG. 2 is a schematic cross-sectional view illustrating a semiconductor manufacturing apparatus for manufacturing a semiconductor device according to an embodiment of the present invention.
- an introduction part 12 for introducing a reaction gas into the chamber 11 of the semiconductor manufacturing apparatus 10 is formed.
- the reaction gas introduced by the introduction part 12 may be injected into the chamber 11 through the shower head 13.
- the substrate 100 to be deposited is placed on the chuck 14, which is supported by the chuck support 16. If necessary, the chuck 14 may apply heat to the substrate 100 so that the substrate 100 has a predetermined temperature. After the deposition is performed by this apparatus, it is discharged by the discharge unit 17.
- the semiconductor manufacturing apparatus 10 may be used for the seed layer formation (S140) and the metal layer formation (S150) described above with reference to FIG. Alternatively, the semiconductor manufacturing apparatus 10 may be used for the seed layer formation S140 described above with reference to FIG. 1.
- the semiconductor manufacturing apparatus 10 may be, for example, a chemical vapor deposition (CVD) device.
- CVD chemical vapor deposition
- FIG 3 is a cross-sectional view illustrating a step of forming a polysilicon pattern according to an exemplary embodiment of the present invention.
- a polysilicon pattern 240 is formed on the substrate 100.
- Substrate 100 may include a semiconductor substrate, for example, a silicon or compound semiconductor wafer.
- the substrate 100 may include a semiconductor such as glass, metal, ceramic, quartz, and other substrate materials.
- the tunneling insulation layer pattern 210, the charge storage layer pattern 220, and the blocking insulation layer pattern 230 are disposed on the substrate 100 to be disposed between the substrate 100 and the polysilicon pattern 240 together with the polysilicon pattern 240. ) May be formed together to form a multilayer structure 200.
- the tunneling insulating layer pattern 210 may be, for example, a silicon oxide film, an insulating film having a high dielectric constant, a metal oxide film having a high dielectric constant, or a combination thereof.
- Charges to be stored in the charge storage layer pattern 220 may be transferred from the substrate 100 through the tunneling insulating layer pattern 210. In this case, the charge to be stored in the charge storage layer pattern 220 may pass through the tunneling insulating layer pattern 210 by hot electrons or F-N tunneling.
- the charge storage layer pattern 220 may be a conductor or a trap type insulating layer.
- the semiconductor device to be formed later may be a conventional flash memory.
- the charge storage layer pattern 220 may be made of polysilicon.
- a semiconductor device to be formed later may be a charge trap flash (CTF).
- the charge storage layer pattern 220 may include nitride.
- the blocking insulating layer pattern 230 may block the charge so that the charge stored in the charge storage layer pattern 220 does not leak to the polysilicon pattern 240.
- the blocking insulating layer pattern 230 may have a material and a thickness determined in consideration of capacitor coupling and insulating characteristics with the tunneling insulating layer pattern 210.
- the blocking insulating layer pattern 230 may be a heat transfer film having a high dielectric constant, a silicon oxide film, a metal oxide film having a high dielectric constant, or a combination thereof.
- the polysilicon pattern 240 may serve as a gate electrode when the semiconductor device to be formed later is a nonvolatile memory device.
- tunneling insulation layer pattern 210 In order to form the tunneling insulation layer pattern 210, the charge storage layer pattern 220, the blocking insulation layer pattern 230, and the polysilicon pattern 240, a tunneling charge layer (not shown) and a charge storage layer (not shown) After forming the blocking insulating layer (not shown) and the polysilicon layer (not shown), a photolithography process and an etching process may be performed.
- FIG. 4 is a cross-sectional view illustrating a step of forming an insulating material according to an embodiment of the present invention.
- an insulating material 300a is formed on the substrate 100 on which the polysilicon pattern 240 is formed to cover all of the polysilicon patterns 240.
- the insulating material 300a may be formed of, for example, a silicon oxide film or a silicon nitride film.
- FIG. 5 is a cross-sectional view illustrating a step of forming an insulating layer according to an embodiment of the present invention.
- the insulating material 300a is partially removed to form the insulating layer 300.
- an etch-back process may be performed after the insulating material 300a is formed.
- a planarization process such as chemical mechanical polishing (CMP) may be performed.
- the insulating layer 300 may have a step according to its position.
- the portion adjacent to the multilayer structure 200 may have a thicker thickness than the middle portion between the multilayer structures 200.
- a portion of the side surface and the top surface of the polysilicon pattern 240 may be exposed by the insulating layer 300.
- the insulating layer 300 may have the same thickness with respect to the upper surface of the substrate 100.
- the insulating layer 300 may have a thickness that is the same as or similar to that of the multilayer structure 200.
- only the top surface of the polysilicon pattern 240 may be exposed by the insulating layer 300.
- FIG. 6 is a cross-sectional view illustrating a step of pretreating a substrate on which an insulating layer is formed according to an embodiment of the present invention.
- the substrate 100 on which the insulating layer 300 is formed is pre-treated using a solution containing a hydrogen group.
- the solution containing the hydrogen group may be, for example, an HF solution, a diluted hydrogen fluoride (DHF) solution, or a buffered oxide etchant (BOE) solution.
- FIG. 7 is a conceptual diagram illustrating a cross-section of a substrate on which an insulating layer is formed, according to an embodiment of the present invention.
- hydrogen atoms (H) are bonded in order to satisfy tetravalent bonds among the silicon atoms (Si) included in the polysilicon pattern 240 to the surface.
- those exposed to the surface of the oxygen element (O) or nitrogen atom (N) included in the insulating layer 300 is bonded with the hydrogen atom (H). Bonding the hydrogen atom (H) on the exposed surface in this way may be referred to as H group passivation treatment.
- a part of the polysilicon pattern 240 and the insulating layer 300 is removed by a solution containing a hydrogen group.
- a solution containing a hydrogen group can be.
- the natural oxide film formed on the polysilicon pattern 240 may be removed by a solution including a hydrogen group.
- FIG. 8 is a cross-sectional view illustrating a step of forming a silicon seed layer according to an embodiment of the present invention.
- a silicon seed layer 400 is selectively formed on the surface of the polysilicon pattern 240 exposed by the insulating layer 300. That is, the silicon seed layer 400 is formed on the exposed surface of the polysilicon pattern 240. It is not formed on the exposed surface of the insulating layer 300.
- silicon seed layers 400 may be formed on the surface of the insulating layer 300 adjacent to the polysilicon pattern 240, but the seed layer 400 formed on the polysilicon pattern 240 may be an insulating layer ( It merely covers a portion of the surface of 300 and may not be formed from the surface of the insulating layer 300.
- the silicon seed layer 400 may be maintained so that the bonded hydrogen atoms H may be maintained. Can be performed within about 2 hours of formation.
- FIG. 9 is a conceptual diagram illustrating a cross section in which a silicon seed layer is formed according to an embodiment of the present invention.
- the hydrogen atoms H bonded on the polysilicon pattern 240 are replaced with silicon atoms Si to form a silicon seed layer 400 on the polysilicon pattern 240. Is formed.
- the silicon seed layer 400 has a silicon atom (Si) substituted for the hydrogen atom (H) bonded on the polysilicon pattern 240 and a silicon atom (Si) substituted for the hydrogen atom (H). It may include all of the silicon atoms (not shown) bonded to.
- the silicon seed layer 400 may be formed only on the polysilicon pattern 240 and may not be formed on the insulating layer 300. That is, when the silicon seed layer 400 is formed, the hydrogen atoms H bonded on the polysilicon pattern 240 are replaced with silicon atoms Si, but the hydrogen atoms H bonded on the insulating layer 300. ) May remain the same. Therefore, the silicon seed layer 400 may be formed on the polysilicon pattern 240 with respect to the insulating layer 300.
- the insulating layer 300 may be formed of, for example, a silicon oxide film or a silicon nitride film.
- the hydrogen atom (H) may have different bonding energy for bonding, depending on the kind of atoms to be bonded. For example, the bonding energy of the bond of hydrogen-oxygen (HO) is 4.8 eV, the bonding energy of the bond of hydrogen-nitrogen (HN) is 4.0 eV, and the bonding energy of the bond of hydrogen-silicon (H-Si) is 3.3 eV. to be.
- the bonded hydrogen atoms can be selectively removed. That is, when the silicon precursor is supplied under the appropriate process conditions to form the silicon seed layer 400, the hydrogen-silicon (H-Si) having the lowest bonding energy is separated, and the hydrogen-high bonding energy is relatively high. The bond between nitrogen (HN) or the bond between hydrogen-oxygen (HO) can be maintained.
- the silicon seed layer 400 may be selectively formed only on the polysilicon pattern 240. Can be.
- the temperature of the substrate 100 may be maintained at 500 ° C. to 650 ° C.
- the pressure inside the chamber may be maintained at 5 Torr to 20 Torr to form the silicon seed layer 400.
- a silicon-based gas may be used as the silicon precursor.
- the silicon precursor may include SiH 4 , Si 2 H 6 , Si 3 H 8, or Si 4 H 10 .
- the silicon precursor may be supplied for 20 seconds to 160 seconds at a flow rate of 5sccm to 20sccm.
- nitrogen (N 2 ) or hydrogen (H 2 ) gas may be supplied together as a carrier gas.
- the carrier gas may be supplied at a flow rate of 5000 sccm to 30000 sccm.
- the supply time of the silicon precursor may be reduced. That is, the pressure inside the chamber and the supply time of the silicon precursor may have an inverse relationship.
- FIG. 10 is a cross-sectional view illustrating a step of forming a metal layer according to an embodiment of the present invention.
- the metal layer 500 may be formed to cover the substrate 100 on which the silicon seed layer 400 is formed.
- the metal layer 500 may be made of a refractory metal.
- the metal layer 500 may be, for example, Ti, Co, or Ni.
- FIG. 11 is a cross-sectional view illustrating a step of forming a metal silicide layer according to an embodiment of the present invention.
- a metal silicide layer 600 is formed on a polysilicon pattern 240 by heat-treating the substrate 100 on which the metal layer 500 is formed.
- the metal silicide layer 600 may be formed by combining metal atoms included in the metal layer 500 and silicon atoms included in the silicon seed layer 400 and the polysilicon pattern 240 in FIG. 10.
- the metal silicide layer 600 may be formed of, for example, TiSi 2 , CoSi 2, or NiSi.
- a metal silicide layer 600 having a C54-TiSi 2 phase having a lower specific resistance than C49-TiSi 2 may be formed.
- the metal layer is Co
- the metal silicide layer 600 made of CoSi 2 having a lower specific resistance than Co 2 Si or CoSi may be formed.
- the metal layer is Ni
- the metal silicide layer 600 made of NiSi having a lower specific resistance than NiSi 2 may be formed.
- the metal silicide layer 600 may be formed to cover more of the top surface of the polysilicon pattern 400.
- a flash cell such as the multilayer structure 200 is included between the polysilicon pattern 400 and the substrate 100, a high voltage is required. Therefore, as the metal silicide layer 600 covers the upper surface of the polysilicon pattern 400 more, the voltage drop may be minimized.
- the data may have stable program / erase characteristics.
- FIG. 12 is a cross-sectional view illustrating a step of removing a remaining metal layer according to an embodiment of the present invention.
- the metal silicide layer 600 is formed and the remaining metal layer 500 is removed.
- an etching process having an etch selectivity with respect to the metal silicide layer 600 and the insulating layer 300 may be used.
- Secondary heat treatment may be optionally performed as necessary. Secondary heat treatment may be used to further reduce the resistivity of the formed metal silicide layer 600. For example, when the metal silicide layer 600 is Ti-silicide, secondary heat treatment may be performed to change all phases other than C54-TiSi 2 , such as C49-TiSi 2 , into the C54-TiSi 2 phase. In this case, the secondary heat treatment may be performed at a higher temperature than the heat treatment process described with reference to FIG. 11.
- secondary heat treatment may be performed to change all phases other than CoSi 2 , such as Co 2 Si or CoSi, into a CoSi 2 phase.
- the secondary heat treatment may be performed at a higher temperature than the heat treatment process described with reference to FIG. 11.
- the metal silicide layer 600 is Ni-silicide
- phases other than NiSi such as Ni 3 Si, Ni 31 Si 12 , Ni 5 Si 2 , Ni 2 Si, and Ni 3 Si 2 remain.
- secondary heat treatment may be performed to change them into the NiSi phase.
- a relatively low temperature heat treatment may be performed as compared to the case of Ti-silicide or Co-silicide described above so that no NiSi 2 phase is formed.
- the present invention can be applied to various types of semiconductor manufacturing processes such as deposition processes.
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Abstract
Description
Claims (13)
- 폴리실리콘 패턴이 형성된 기판 상에 상기 폴리실리콘 패턴이 노출되도록 절연층을 형성하는 단계;상기 절연층에 대하여 선택적으로, 상기 노출된 폴리실리콘 패턴 상에 실리콘 시드층을 형성하는 단계;상기 실리콘 시드층이 형성된 상기 기판 상에 금속층을 형성하는 단계; 및상기 금속층이 형성된 상기 기판을 열처리하여 금속 실리사이드층을 형성하는 단계;를 포함하는 반도체 소자의 제조 방법.
- 제1 항에 있어서,상기 실리콘 시드층을 형성하는 단계 전에,상기 절연층이 형성된 기판을 수소기를 포함하는 용액을 사용하여 전처리(pre-treatment)하는 단계;를 더 포함하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제2 항에 있어서,상기 전처리하는 단계는,상기 기판 상에 노출된 절연층 및 폴리실리콘 패턴 상에 수소 원자가 본딩되도록 하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제2 항에 있어서,상기 수소기를 포함하는 용액은, HF 용액, DHF(diluted hydrogen fluoride) 용액 및 BOE(Buffered Oxide Etchant)용액을 포함하는 군으로부터 선택된 하나 이상의 용액인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제1 항에 있어서,상기 절연층을 형성하는 단계는,기판 상에 폴리실리콘 패턴을 형성하는 단계;상기 폴리실리콘 패턴을 덮도록 상기 기판 상에 절연물질을 형성하는 단계; 및상기 폴리실리콘 패턴을 노출되도록 상기 절연물질을 일부 제거하는 단계;를 포함하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제1 항에 있어서,상기 실리콘 시드층을 형성하는 단계는,상기 기판이 로딩된 챔버의 내부에 SiH4, Si2H6, Si3H8 및 Si4H10을 포함하는 군으로부터 선택된 하나 이상의 소스가스를 공급하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제6 항에 있어서,상기 실리콘 시드층을 형성하는 단계는,상기 기판의 온도를 500℃ 내지 650℃로 유지하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제6 항에 있어서,상기 실리콘 시드층을 형성하는 단계는,상기 챔버 내부의 압력을 5Torr 내지 20Torr로 유지하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제1 항에 있어서,상기 금속층은 Ti, Co 및 Ni을 포함하는 군으로부터 선택된 하나 이상의 금속인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제1 항에 있어서,상기 금속 실리사이드층을 형성하는 단계 후에,잔류한 상기 금속층을 제거하는 단계;를 더 포함하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제3 항에 있어서,상기 절연층은,산화물 또는 질화물로 이루어지는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제10 항에 있어서,상기 실리콘 시드층을 형성하는 단계는,상기 절연층 및 폴리실리콘 패턴 상에 본딩된 수소 원자 중, 상기 폴리실리콘 패턴 상에 본딩된 수소 원자만을 선택적으로 실리콘 원자로 대체하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제12 항에 있어서,상기 실리콘 시드층을 형성하는 단계는,수소와 산소 또는 수소와 질소 사이의 본딩 에너지와 수소와 실리콘 사이의 본딩 에너지의 차이를 이용하여 상기 노출된 폴리실리콘 패턴 상에 선택적으로 상기 실리콘 시드층을 형성하는 것을 특징으로 하는 반도체 소자의 제조 방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201180042743.XA CN103081064B (zh) | 2010-09-06 | 2011-08-30 | 半导体器件的制备方法 |
| US13/814,533 US8937012B2 (en) | 2010-09-06 | 2011-08-30 | Production method for semiconductor device |
| JP2013525842A JP5698847B2 (ja) | 2010-09-06 | 2011-08-30 | 半導体素子の製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2010-0086963 | 2010-09-06 | ||
| KR1020100086963A KR20120024199A (ko) | 2010-09-06 | 2010-09-06 | 반도체 소자의 제조 방법 |
Publications (2)
| Publication Number | Publication Date |
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| WO2012033299A2 true WO2012033299A2 (ko) | 2012-03-15 |
| WO2012033299A3 WO2012033299A3 (ko) | 2012-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2011/006389 Ceased WO2012033299A2 (ko) | 2010-09-06 | 2011-08-30 | 반도체 소자의 제조 방법 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8937012B2 (ko) |
| JP (1) | JP5698847B2 (ko) |
| KR (1) | KR20120024199A (ko) |
| CN (1) | CN103081064B (ko) |
| WO (1) | WO2012033299A2 (ko) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018063302A1 (en) | 2016-09-30 | 2018-04-05 | Intel Corporation | Backside source/drain replacement for semiconductor devices with metallization on both sides |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196075A (ja) * | 1987-02-10 | 1988-08-15 | Fujitsu Ltd | Mis半導体装置の製造方法 |
| JPH04307768A (ja) * | 1991-04-04 | 1992-10-29 | Seiko Epson Corp | 薄膜トランジスタとその製造方法 |
| JPH08339996A (ja) * | 1995-06-12 | 1996-12-24 | Toshiba Corp | 半導体装置の製造方法 |
| KR100272653B1 (ko) | 1996-12-10 | 2000-12-01 | 김영환 | 반도체 소자의 제조방법 |
| JPH10256189A (ja) * | 1997-03-07 | 1998-09-25 | Hitachi Ltd | 半導体集積回路装置の製造方法 |
| JP3033518B2 (ja) * | 1997-04-21 | 2000-04-17 | 日本電気株式会社 | 半導体装置の製造方法 |
| JP2000156350A (ja) * | 1998-11-19 | 2000-06-06 | Sony Corp | バッチ式縦型HSG−Si形成装置 |
| KR100379107B1 (ko) * | 2001-03-21 | 2003-04-07 | 삼성전자주식회사 | 반도체 장치에서 폴리사이드 구조물의 형성 방법 |
| JP2003007869A (ja) * | 2001-06-26 | 2003-01-10 | Fujitsu Ltd | 半導体装置及びその製造方法 |
| KR20040001455A (ko) | 2002-06-28 | 2004-01-07 | 주식회사 하이닉스반도체 | 선택적 성장법을 이용한 반도체소자의 제조방법 |
| KR100493047B1 (ko) * | 2003-02-13 | 2005-06-07 | 삼성전자주식회사 | 선택적 에피택셜 성장을 이용한 반도체 소자의 국부 배선형성 방법 |
| KR100539158B1 (ko) * | 2004-04-20 | 2005-12-26 | 주식회사 하이닉스반도체 | 플래쉬 메모리 소자의 게이트간 유전막 형성 방법 |
| US7078326B1 (en) * | 2005-01-19 | 2006-07-18 | Marsh Eugene P | Nucleation method for atomic layer deposition of cobalt on bare silicon during the formation of a semiconductor device |
| US20070099806A1 (en) * | 2005-10-28 | 2007-05-03 | Stewart Michael P | Composition and method for selectively removing native oxide from silicon-containing surfaces |
| US7666774B2 (en) * | 2007-01-23 | 2010-02-23 | International Business Machines Corporation | CMOS structure including dual metal containing composite gates |
| JP2009026802A (ja) * | 2007-07-17 | 2009-02-05 | Toshiba Corp | 半導体装置の製造方法および半導体装置 |
| KR20090106880A (ko) | 2008-04-07 | 2009-10-12 | 주식회사 하이닉스반도체 | 고집적 반도체 소자의 게이트 형성방법 |
-
2010
- 2010-09-06 KR KR1020100086963A patent/KR20120024199A/ko not_active Ceased
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2011
- 2011-08-30 CN CN201180042743.XA patent/CN103081064B/zh not_active Expired - Fee Related
- 2011-08-30 WO PCT/KR2011/006389 patent/WO2012033299A2/ko not_active Ceased
- 2011-08-30 US US13/814,533 patent/US8937012B2/en active Active
- 2011-08-30 JP JP2013525842A patent/JP5698847B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP5698847B2 (ja) | 2015-04-08 |
| US8937012B2 (en) | 2015-01-20 |
| JP2013546158A (ja) | 2013-12-26 |
| CN103081064B (zh) | 2015-07-29 |
| KR20120024199A (ko) | 2012-03-14 |
| WO2012033299A3 (ko) | 2012-06-14 |
| CN103081064A (zh) | 2013-05-01 |
| US20130130497A1 (en) | 2013-05-23 |
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