WO2003060970A1 - Semiconductor integrated circuit device manufacturing method - Google Patents
Semiconductor integrated circuit device manufacturing method Download PDFInfo
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- WO2003060970A1 WO2003060970A1 PCT/JP2003/000068 JP0300068W WO03060970A1 WO 2003060970 A1 WO2003060970 A1 WO 2003060970A1 JP 0300068 W JP0300068 W JP 0300068W WO 03060970 A1 WO03060970 A1 WO 03060970A1
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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
- C23C16/44—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 method of coating
- C23C16/455—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 method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45557—Pulsed pressure or control pressure
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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
- C23C16/44—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 method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28035—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28525—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table the conductive layers comprising semiconducting material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/32051—Deposition of metallic or metal-silicide layers
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- H10D64/0113—
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- H10D64/01302—
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- H10D64/01306—
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- H10P14/412—
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- H10P14/43—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/905—Cleaning of reaction chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/909—Controlled atmosphere
Definitions
- the present invention relates to a technique for manufacturing a semiconductor integrated circuit device, and more particularly to an effective technique applied to a step of depositing a silicon film into which impurity ions are introduced by a chemical vapor deposition (CVD) method.
- CVD chemical vapor deposition
- a polycrystalline silicon film to which an impurity is added is used as a gate electrode material of a metal insulator semiconductor field effect transistor (MISFET).
- MISFET metal insulator semiconductor field effect transistor
- H 3 or PH 3 can be used for an n-channel MISFET
- B 2 H 6 or the like can be used for a p-channel MISFET. it can.
- Such a polycrystalline silicon film can be formed, for example, using a low-pressure CVD apparatus.
- the low-pressure CVD apparatus is described on November 20, 1997, edited by Japan Semiconductor Equipment Association, published by Nikkan Kogyo Shimbun, "Semiconductor Equipment Dictionary 4th Edition", p.
- a semiconductor wafer is inserted into the processing chamber, and then the processing chamber is evacuated.
- the process waits for a certain time until the temperature in the processing chamber rises, and thereafter, a film is formed by introducing a generated gas into the processing chamber. At this time, the polycrystalline silicon film is formed not only on the surface of the semiconductor wafer but also on the inner wall of the processing chamber.
- the temperature in the processing chamber rises in a similar process in a state in which the processing chamber is evacuated to a vacuum or atmospheric pressure or lower. Wait for a certain time until At this time, impurities diffuse from the polycrystalline silicon film formed on the inner wall of the processing chamber. The diffused impurities are scattered on the semiconductor wafer before the polycrystalline silicon film is formed, and are introduced into the gate oxide film formed on the surface of the semiconductor wafer before the gate oxidation. There is a problem that the insulating properties of the film are deteriorated.
- An object of the present invention is to suppress diffusion of impurities from a similar polycrystalline silicon film formed on the inner wall of a processing chamber when forming a polycrystalline silicon film to which impurities are added by a low-pressure CVD apparatus. To provide technology.
- the present invention includes a step of inserting a semiconductor substrate into a processing chamber of a first film forming apparatus; a step of heating the processing chamber; and after the heating step, a step of chemically depositing the semiconductor substrate on the semiconductor substrate.
- step (b) after the step (a), heating the processing chamber in a state in which the processing chamber is kept at a vacuum or an atmospheric pressure or lower, and the time required for the step (a) is the same as the time required for the step (b). It is longer than the time required.
- the present invention provides a process for forming an insulating film on a semiconductor substrate, and thereafter, introducing the semiconductor substrate into a processing chamber of a first film forming apparatus; and maintaining the processing chamber at atmospheric pressure. Heating the semiconductor substrate; and, after heating the semiconductor substrate, reducing the pressure in the processing chamber to vacuum or atmospheric pressure or lower while heating the semiconductor substrate. Maintaining the atmospheric pressure or less, and forming a semiconductor film to which conductive impurities are added on the insulating film by a chemical film forming means.
- the step of heating the semiconductor substrate while maintaining the processing chamber at atmospheric pressure comprises: setting the temperature of the semiconductor substrate to a first temperature of the semiconductor substrate when the semiconductor film is formed. Heating or heating for bringing the temperature of the semiconductor substrate closer to the first temperature is performed.
- the present invention provides a semiconductor device, comprising: forming an insulating film on a semiconductor substrate; introducing the semiconductor substrate into a processing chamber of a first film forming apparatus; and maintaining the processing chamber at a first atmospheric pressure. A step of heating the substrate to a first temperature; and a step of reducing the pressure in the processing chamber to a pressure of 2 atm or less while heating the semiconductor substrate. Maintaining a third atmospheric pressure and forming a silicon film to which a conductive impurity is added on the insulating film of the semiconductor substrate at the first temperature by a chemical film forming means, The pressure is reduced so that the second pressure is lower than the third pressure, and the first pressure is higher than the third pressure.
- the present invention also provides a process for forming an insulating film on a semiconductor substrate, a process for inserting the semiconductor substrate into a processing chamber of a first film forming apparatus, and a process for maintaining the processing chamber at a first pressure.
- heating is performed while maintaining the first atmospheric pressure higher than the third atmospheric pressure and bringing the temperature of the semiconductor substrate closer to the first temperature.
- FIG. 1 is a fragmentary cross-sectional view showing a method for manufacturing a semiconductor integrated circuit device according to one embodiment of the present invention.
- FIG. 2 is a fragmentary cross-sectional view of the semiconductor integrated circuit device during a manufacturing step following that of FIG.
- FIG. 3 is an explanatory diagram illustrating a configuration of a CVD device used for manufacturing a semiconductor integrated circuit device according to an embodiment of the present invention.
- FIG. 4 is a time chart at the time of depositing a polycrystalline silicon film during a manufacturing process of a semiconductor integrated circuit device according to an embodiment of the present invention.
- FIG. 5 is a diagram illustrating a method for manufacturing a semiconductor integrated circuit device according to an embodiment of the present invention.
- FIG. 4 is an explanatory diagram showing insulating properties of a gate oxide film when a crystalline silicon film is formed.
- FIG. 6 is a time chart at the time of depositing a polycrystalline silicon film in a manufacturing process in comparison with a manufacturing process of a semiconductor integrated circuit device according to an embodiment of the present invention.
- FIG. 7 is an explanatory diagram showing the insulation characteristics of a gate oxide film when a polycrystalline silicon film is formed by a manufacturing process compared to a manufacturing process of a semiconductor integrated circuit device according to an embodiment of the present invention.
- FIG. 8 is a fragmentary cross-sectional view of the semiconductor integrated circuit device during a manufacturing step following that of FIG.
- FIG. 9 is a fragmentary cross-sectional view of the semiconductor integrated circuit device during a manufacturing step following that of FIG.
- FIG. 10 is a time chart at the time of depositing a polycrystalline silicon film in a manufacturing process of a semiconductor integrated circuit device according to another embodiment of the present invention.
- FIG. 11 is a fragmentary cross-sectional view showing a method for manufacturing a semiconductor integrated circuit device according to another embodiment of the present invention.
- FIG. 12 is a fragmentary cross-sectional view of the semiconductor integrated circuit device during a manufacturing step following that of FIG.
- FIG. 13 is an explanatory diagram illustrating a configuration of a CVD device used for manufacturing a semiconductor integrated circuit device according to another embodiment of the present invention.
- FIG. 14 is an explanatory diagram showing a configuration of a semiconductor substrate arranged in a wafer holder and a wafer holder included in the CVD apparatus shown in FIG.
- FIG. 15 is a time chart showing a pressure change in the processing chamber when a polycrystalline silicon film is deposited during a manufacturing process of a semiconductor integrated circuit device according to another embodiment of the present invention.
- FIG. 16 is a time chart showing a temperature change in a processing chamber when a polycrystalline silicon film is deposited during a manufacturing process of a semiconductor integrated circuit device according to another embodiment of the present invention.
- a semiconductor substrate 1 made of single-crystal silicon is heat-treated to form a thin silicon oxide film (pad oxide film) having a thickness of about 1 Onm on its main surface.
- a silicon nitride film having a thickness of about 120 nm is deposited on the silicon nitride film by the CVD method, and then the silicon nitride film in the element isolation region and the silicon nitride film in the element isolation region are dry-etched using a photoresist film as a mask. The silicon film is removed.
- a groove having a depth of about 350 nm is formed in the semiconductor substrate 1 in the element isolation region by dry etching using the silicon nitride film as a mask, and then the etching is performed to remove a damaged layer formed on the inner wall of the groove. Then, the semiconductor substrate 1 is heat-treated to form a thin silicon oxide film having a thickness of about 10 nm on the inner wall of the groove.
- the semiconductor substrate 1 is heat-treated to improve the film quality of the silicon oxide film 2 and the silicon oxide film 2 is densified. (Bake tightening).
- the silicon oxide film 2 is polished by a chemical mechanical polishing (CMP) method using the silicon nitride film as a stopper, and is left inside the groove, thereby flattening the surface.
- CMP chemical mechanical polishing
- impurity ions having p-type conductivity for example, B (boron)
- the semiconductor substrate 1 is heat-treated to form a clean gate oxide film (insulating film) 5 on the surface of the p-type well 4.
- the deposition of the polycrystalline silicon film 6 can be performed using, for example, a patch-type low-pressure CVD apparatus (first film forming apparatus) as shown in FIG. This low pressure CV
- the D apparatus has a wafer holder WH for holding the semiconductor substrate 1 in the processing chamber DC.
- the SiH 4 gas is supplied into the treated nitrogen DC through the tube TU1, and the polycrystalline silicon film 6 can be formed by thermal decomposition of the SiH 4 gas.
- Ji Yupu TU2 by supplying PH 3 gas into the processing chamber DC from TU3, Degiru be added Jfl the PH 3 to Tayui crystal silicon film 6.
- S i H 4 Gasuoyopi PH 3 gas supplied into the processing chamber DC can be exhausted from the exhaust port EX.
- Symbols UU, U, CU, CL, L, and LL in the figure are indices indicating the height at which the semiconductor substrate 1 is held in the processing chamber DC.
- the polycrystalline silicon film 6 is formed according to the time chart shown in FIG. T in the figure is the time required for heating the inside of the processing chamber DC before the start of film formation, and can be defined by the capacity in the processing chamber DC.
- A is the time required for heating the inside of the processing chamber DC under the atmospheric pressure after the semiconductor substrate 1 is inserted into the processing chamber DC
- B is the time required when the inside of the processing chamber DC is evacuated or the atmospheric pressure or less.
- T is defined as the sum of A and B.
- the polycrystalline silicon film 6 is formed not only on the semiconductor substrate 1 but also on the inner walls of the processing chamber DC and the tubes TU1, TU2, and TU3 shown in FIG. Further, this CVD apparatus is used repeatedly for forming the polycrystalline silicon film 6, and when a new semiconductor substrate 1 is inserted into the processing chamber DC, the polycrystalline silicon film is placed at various points in the processing chamber DC. In this state, the film 6 is formed. In this situation, when the inside of the processing chamber DC is heated for a long time to a vacuum or an atmospheric pressure or less, PH 3 contained in the polycrystalline silicon film 6 formed at various points in the processing chamber DC becomes the polycrystalline silicon film. Diffuses from 6.
- the PH 3 is introduced into the gate oxide film 5 formed on the semiconductor substrate 1, and may degrade the insulating properties of the gate oxide film 5.
- the above heating step was performed under the condition that the relationship between A and B was 0.IXB ⁇ A ⁇ 13 XB. It was found that the diffusion of PH 3 contained in the formed polycrystalline silicon film 6 could be suppressed.
- a and B are specified to satisfy the above conditions of about 45 minutes and about 15 minutes, respectively, and the main surface of the semiconductor substrate 1 is divided into 296 areas, and the gate insulating film 5 in each area is divided.
- An experiment was conducted to examine the deterioration of the insulation characteristics of the GaN. That is, split The voltage Vg is applied to the gate insulating film 5 in each of the regions thus measured, and the flowing current Ig is measured.
- the above T is specified in about 60 minutes.
- FIG. 5 (a) when the height at which the semiconductor substrate 1 is held is UU (see FIG. 3), the insulation characteristics deteriorate only in three of the 296 regions.
- the heating time in the processing chamber DC under the vacuum or the atmospheric pressure is less than the time A required for heating the processing chamber DC under the atmospheric pressure.
- a gate electrode 6N is formed by dry-etching the polycrystalline silicon film 6 using a photoresist film (not shown) patterned by the photolithography technique as a mask.
- a silicon oxide film is deposited on the semiconductor substrate 1 by a CVD method, and the silicon oxide film is anisotropically etched by a reactive ion etching (RIE) method. Thereby, a side wall spacer 7 is formed on the side wall of the good electrode 6N.
- RIE reactive ion etching
- an n-type impurity (eg, P) having an n-type conductivity type is ion-implanted into the p-type well 4 on both sides of the gate electrode 6 N to form an n-type semiconductor region 8 that constitutes the source and drain regions of the n-channel MISFET
- a low-concentration n-type semiconductor region may be formed before the formation of the sidewall spacer 7 and a high-concentration n-type semiconductor region may be formed after the formation of the sidewall spacer 7.
- an n-channel type MISFETQn can be formed.
- a Co (cobalt) film (not shown) is deposited on the semiconductor substrate 1 by, for example, a sputtering method.
- the semiconductor substrate 1 is subjected to a heat treatment at about 600 ° C. to cause a silicidation reaction at the interface between the n-type semiconductor region 8 and the gate electrode 6N and the Co film.
- a Co Si 2 layer 10 is formed. By forming the CoSi 2 layer 10, it is possible to prevent the occurrence of a spike between the wiring formed on the n-type semiconductor region 8 and the semiconductor substrate 1 in a later step. .
- the resistance of the Co Si 2 layer 10 is reduced by a heat treatment at about 700 ° C. to 800 ° C. Thereby, the contact resistance between the wiring and the n-type semiconductor region 8 can be reduced.
- an interlayer insulating film is formed on the n-channel type MISFETQn.
- the interlayer insulating film 11 is formed, and then the interlayer insulating film 11 is dry-etched using the photoresist film as a mask to form a through-hole 12 above the n-type semiconductor region 8.
- Wiring 14 is formed on the upper part, and the semiconductor package of the first embodiment is formed. Manufactures integrated circuit devices.
- the interlayer insulating film 11 is formed, for example, by depositing a silicon oxide film by a CVD method.
- a metal film such as a W or A1 alloy is deposited on the interlayer insulating film 11 by sputtering, and then the metal film is patterned by dry etching using a photoresist film as a mask. It forms by doing.
- a multilayer wiring may be formed by repeating the process of forming the interlayer insulating film 11, the through hole 12 and the wiring 14 a plurality of times.
- the method for manufacturing a semiconductor integrated circuit device includes a method of manufacturing a polycrystalline silicon film 6 (see FIG. 2) along a time chart different from the time chart described with reference to FIG. 4 in the first embodiment. Is formed.
- the method of manufacturing the semiconductor integrated circuit device according to the second embodiment is the same as the method described in the first embodiment with reference to FIG. Thereafter, the semiconductor substrate 1 is introduced into the processing chamber DC of the CVD apparatus shown in FIG. Subsequently, the polycrystalline silicon film 6 is formed along a time chart shown in FIG.
- the inside of the processing chamber DC is set to a vacuum or an atmospheric pressure or less, and the inside of the processing chamber DC is heated.
- the time T required for heating the inside of the processing chamber DC before the start of the formation of the polycrystalline silicon film 6 is the same as that in the first embodiment, but the thin non-doped polysilicon
- the crystalline silicon film 6 is deposited.
- the gate oxide film 5 is covered with the non-doped polycrystalline silicon film 6, and the inside of the processing chamber DC is heated to a vacuum or lower than the atmospheric pressure to form a film at various points in the processing chamber DC. Even if the PH 3 contained in the polycrystalline silicon film 6 diffuses from the polycrystalline silicon film 6, the non-doped polycrystalline silicon film 6 protects the gut oxide film 5, and the PH 3 forms the gate oxide film. 5 can be prevented from being introduced. That is, it is possible to prevent the insulation characteristics of the gate oxide film 5 from deteriorating.
- a polycrystalline silicon film 6 to which PH 3 is added is deposited through a heating step defined by T. '
- the method of manufacturing the semiconductor integrated circuit device according to the third embodiment is the same as the method described in the first embodiment with reference to FIG. Thereafter, as shown in FIG. 11, a thin film is formed on the semiconductor substrate 1 using a film forming apparatus (second film forming apparatus) different from the CVD apparatus described in Embodiment 1 with reference to FIG. A trinic polycrystalline silicon film 6A is deposited. As a result, the gate oxide film 5 is covered with the intrinsic polycrystalline silicon film 6A. That is, when the polycrystalline silicon layer 6 to which PH 3 is added is subsequently deposited by the CVD apparatus as described with reference to FIG. 3 in the first embodiment, a film is formed at various points in the processing chamber DC.
- a film forming apparatus second film forming apparatus
- the intrinsic polycrystalline silicon film 6A protects the gate oxide film 5, and the PH 3 becomes the gate oxide. It can be prevented from being introduced into the film 5. As a result, it is possible to prevent the insulation characteristics of the gate oxide film 5 from deteriorating.
- the first embodiment is described with reference to FIGS. 8 and 9.
- the semiconductor integrated circuit device according to the third embodiment is manufactured through the same steps as the steps described above.
- Embodiment 4 is a supplementary explanation of Embodiment 1 in further detail.
- FIG. 13 shows the configuration of the low-pressure CVD apparatus described in Embodiment 1 with reference to FIG. 3 in further detail. It is a thing.
- the wafer holder WH has a structure capable of moving up and down between the processing chamber DC and the transfer chamber TA arranged below the processing chamber DC. After a predetermined number of semiconductor substrates 1 are placed on the WH, the wafer holder WH moves up to the processing chamber DC. Polycrystalline silicon film 6 on semiconductor substrate 1 ( After the film formation of the semiconductor film (see Fig. 2) is completed, the wafer holder WH descends to the transfer chamber TA. As described above, the low-pressure CVD apparatus of the present embodiment has the processing chamber DC having the vertical structure.
- a cassette shelf CT for arranging the wafer cassette C A is formed in the transfer chamber T A.
- the wafer cassette C A can accommodate a plurality of semiconductor substrates 1.
- the inside of the transfer chamber TA is assumed to be at room temperature (about 20 ° C.).
- the transfer robot CR performs the disposition of the semiconductor substrate 1 on the wafer holder WH and the removal of the semiconductor substrate 1 on which the polycrystalline silicon film 6 has been formed from the wafer holder WH.
- This transfer robot has a plurality of (for example, five) transfer arms ARM that transfer the semiconductor substrate 1 by sucking it from the back surface, and perform a lifting operation, a horizontal operation, and a rotating operation, so that the wafer is transferred from the wafer cassette CA once. Then, a plurality of semiconductor substrates 1 are taken out, and the semiconductor substrates 1 are placed on the wafer holder WH.
- the holder WH When a predetermined number of semiconductor substrates 1 (for example, approximately 150 when the diameter of the semiconductor substrate 1 is about 150 mm (about 6 inches)) is placed in the wafer holder WH, the holder WH is transferred to the processing chamber DC. And the semiconductor substrate 1 is subjected to a polycrystalline silicon film 6 forming process. When the processing of forming the polycrystalline silicon film 6 is completed and the wafer holder WH is lowered to the transfer chamber TA, the transfer robot CR takes out the semiconductor substrate 1 from the wafer holder WH and stores it in the wafer cassette CA.
- a predetermined number of semiconductor substrates 1 for example, approximately 150 when the diameter of the semiconductor substrate 1 is about 150 mm (about 6 inches)
- the transfer robot CR takes out the semiconductor substrate 1 from the wafer holder WH and stores it in the wafer cassette CA.
- heaters H1, H2, H3, and H4 for heating the processing chamber DC are provided outside the processing chamber DC. Due to the heating by the heaters Hl, H2, H3, and H4, the inside of the processing chamber DC is constantly maintained at about 500 ° C to 600 ° C.
- the heaters HI, H2, H3, and H4 can individually set the heating temperature, and can form a temperature gradient for heating the processing chamber DC. For example, if S i H 4 gas and PH 3 gas are film forming gas is introduced from the lower portion of the processing chamber DC is relatively punished the heater H 4 which is attached to the lower portion of the relatively treatment chamber DC Set the heating temperature of each heater so that the heating temperature becomes higher toward heater 1 installed in the upper part of the laboratory DC.
- the deposition gas introduced from the lower part of the processing chamber DC rises while pyrolyzing. Therefore, the deposition gas is placed in the upper part of the processing chamber DC. It becomes difficult to thermally decompose as you go. That is, it becomes difficult to deposit the polycrystalline silicon film 6 on the semiconductor substrate 1.
- the thermal decomposition of the deposition gas is promoted even in the upper part of the processing chamber DC.
- the heating temperatures of the heaters H1, H2, H3, and H4 can be set individually, they can be heated at almost the same temperature.
- the case where four heaters HI, H2, H3, and H4 are attached to the outside of the processing chamber DC is exemplified.
- the four heaters HI, H2, H3, and H4 are used.
- One heater or a plurality of heaters other than four that can perform the same heat treatment as in the case of heating may be attached. When installing multiple heaters, they do not all have to be the same size!
- FIG. 14 is an explanatory diagram showing a method of arranging the semiconductor substrate 1 on the wafer holder WH.
- illustration of the semiconductor substrate 1 on which the semiconductor integrated circuit device of the present embodiment is actually formed (product) is omitted.
- about 150 semiconductor substrates 1 having a diameter of about 150 mm (about 6 inches) are arranged in wafer holder WH.
- the lowermost 20 wafers and the uppermost 5 wafers are dummy wafers DW arranged to rectify the deposition gas in the processing chamber DC during the deposition process.
- a plurality (for example, about 5) of monitoring wafers MW are arranged at appropriate intervals.
- the monitor wafer MW is arranged for the purpose of measuring the concentration of PH 3 doped in the polycrystalline silicon film 6 and for measuring the thickness of the deposited polycrystalline silicon film 6. is there .
- FIG. 15 shows a pressure change in the processing chamber DC until the start of the formation of the polycrystalline silicon film 6 in the time charts shown in FIGS. 4 and 6 in the first embodiment.
- FIG. 16 shows a temperature change of the semiconductor substrate 1 corresponding to an elapsed time until the formation of the polycrystalline silicon film 6 is started. Both the pressure change shown in Fig. 15 and the temperature change shown in Fig. 16 It shows things from the time when they got inside. In the first embodiment, the time chart shown in FIG.
- FIG. 6 shows an example in which the wafer holder WH completely enters the processing chamber DC and simultaneously starts the decompression processing in the processing chamber DC.
- the pressure reduction processing usually starts after a certain period of time (for example, about several seconds).
- the heaters Hl, H2, H3, and H4 described above heat the processing chamber DC at substantially the same temperature, and do not form a temperature gradient in heating the processing chamber DC. .
- FIG. 15 shows the heat treatment time applied to the processing chamber DC until the start of the decompression processing in the processing chamber DC.
- A is a time chart (corresponding to FIG. 4 shown in the first embodiment) of the film forming means of the present embodiment
- A1 is a film forming method compared with the film forming means of the present embodiment. This is a time chart of the means (corresponding to FIG. 6 shown in the first embodiment).
- the temperature of the semiconductor substrate 1 shown in FIG. 16 is the temperature of the semiconductor substrate (first semiconductor substrate) 1 disposed at the bottom among the semiconductor substrates 1 disposed on the wafer holder WH.
- the wafer holder WH is inserted from above when the wafer holder WH is inserted into the processing chamber DC, and the inside of the processing chamber DC is constantly heated to about 500 ° C to 600 ° C as described above. Therefore, the semiconductor substrate 1 arranged relatively above is heated even while the wafer holder WH is being inserted into the processing chamber DC.
- a temperature difference occurs, for example, the uppermost semiconductor substrate 1 is approximately 300 ° C and the lowermost semiconductor substrate 1 is approximately 200 ° C.
- the lowermost semiconductor substrate 1 having the lowest temperature is formed. It is possible that the temperature has not reached the temperature at which processing can be started. That is, by confirming that the lowermost semiconductor substrate 1 has reached a temperature at which the film forming process can be started.
- the temperature at which the semiconductor substrate 1 can start the film forming process (the first temperature (for example, about After heating to approximately 90% or more of 500 ° C)
- the decompression process in the processing chamber DC is started.
- the value of about 90% or more is based on a value at Celsius degrees.
- the inside of the processing chamber DC is constantly heated to about 500 ° C. to 600 ° C., and this heating temperature is maintained at a temperature at which the semiconductor substrate 1 can perform a film forming process. Since the temperature is set so that the film formation process can be started, the temperature change of the semiconductor substrate 1 becomes stable.
- the pressure in the processing chamber DC is maintained at the atmospheric pressure (first atmospheric pressure). That is, the pressure in the processing chamber DC is maintained at a pressure (first atmospheric pressure) higher than the pressure at which the film forming process is performed (third atmospheric pressure).
- the time from when the wafer holder WH is inserted into the processing chamber DC to when the pressure reduction processing in the processing chamber DC is started is A. Further, the decompression process in the processing chamber DC is stopped when the pressure in the processing room DC # reaches a pressure at which the film forming process can be performed, and the processing chamber DC # is maintained at the pressure. That is, after the pressure in the processing chamber DC is reduced to a pressure (second pressure) equal to or lower than the pressure (third pressure) at which the film forming process is performed, a film forming gas for film formation is supplied into the processing chamber DC to form a film. The film forming process is performed at the pressure to be performed.
- the film forming means compared with the film forming means of the present embodiment, a slight amount of interpulse is required until the pressure reduction processing in the processing chamber DC is started. Despite the time A1, the pressure reduction in the processing chamber DC is started almost immediately after the wafer holder WH is inserted into the processing chamber DC. That is, before the temperature of the semiconductor substrate 1 reaches a temperature at which the film formation process can be started, the pressure reduction process in the processing chamber DC is performed.
- the semiconductor substrate 1 is heated in the processing chamber DC in a state closer to a vacuum as compared with the film forming means of the present embodiment, so that the semiconductor substrate 1 is more heated than the film forming means of the first embodiment. Temperature is hard to rise (see Figure 16). Note that, similarly to the film forming means of this embodiment, the decompression process in the processing chamber DC is performed in the processing chamber DC. It stops when the pressure reaches the level at which film processing can be performed, and holds the inside of the processing chamber DC at that pressure.
- both the film forming means of the present embodiment and the film forming means compared with the film forming means of the present embodiment can perform the decompression treatment in the processing chamber DC to such an extent that no foreign matter is generated in the processing chamber DC. Go as fast as possible. This is because, if another process is performed during the decompression process, there is a risk that foreign matter or the like may be caught in the processing chamber DC, and if foreign matter or the like is caught in the processing chamber DC. This is because there is a concern that the film quality of the polycrystalline silicon film 6 to be formed is deteriorated.
- the method for manufacturing a semiconductor integrated circuit device of the present invention is also applicable to a case where a p-channel MISFET is formed.
- B 2 H 6 or the like is added to the polycrystalline silicon film serving as the gate electrode.
- the method of forming a polycrystalline silicon film according to the above-described embodiment is not limited to forming a polycrystalline silicon film as a gate electrode material, but also as a polycrystalline silicon film as a capacitor electrode of a MOS capacitor or a lower electrode of a DRAM capacitor. It can be applied to the formation of a silicon film.
- the present invention can be applied to a manufacturing process of a semiconductor integrated circuit device including a MISTFET, a dynamic random access memory (DRAM) and a micromachine, and the like.
- a semiconductor integrated circuit device including a MISTFET, a dynamic random access memory (DRAM) and a micromachine, and the like.
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Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2004-7010421A KR20040085145A (ko) | 2002-01-09 | 2003-01-08 | 반도체 집적회로장치의 제조방법 |
| JP2003560969A JP4125239B2 (ja) | 2002-01-09 | 2003-01-08 | 半導体集積回路装置の製造方法 |
| US10/500,931 US7163849B2 (en) | 2002-01-09 | 2003-01-08 | Fabrication method of semiconductor integrated circuit device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002002507 | 2002-01-09 | ||
| JP2002-2507 | 2002-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003060970A1 true WO2003060970A1 (en) | 2003-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/000068 Ceased WO2003060970A1 (en) | 2002-01-09 | 2003-01-08 | Semiconductor integrated circuit device manufacturing method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7163849B2 (ja) |
| JP (1) | JP4125239B2 (ja) |
| KR (1) | KR20040085145A (ja) |
| CN (1) | CN1613142A (ja) |
| WO (1) | WO2003060970A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6017396B2 (ja) * | 2012-12-18 | 2016-11-02 | 東京エレクトロン株式会社 | 薄膜形成方法および薄膜形成装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05217910A (ja) * | 1992-02-05 | 1993-08-27 | Seiko Epson Corp | 化合物半導体の気相成長装置及び気相成長方法 |
| JPH07230955A (ja) * | 1994-02-18 | 1995-08-29 | Hitachi Ltd | 気相成長方法とその装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159300A (en) * | 1996-12-17 | 2000-12-12 | Canon Kabushiki Kaisha | Apparatus for forming non-single-crystal semiconductor thin film, method for forming non-single-crystal semiconductor thin film, and method for producing photovoltaic device |
| KR100305527B1 (ko) * | 1998-07-09 | 2001-11-01 | 니시무로 타이죠 | 반도체장치의 제조방법 및 제조장치 |
| US6270580B2 (en) * | 1999-04-12 | 2001-08-07 | Advanced Micro Devices, Inc. | Modified material deposition sequence for reduced detect densities in semiconductor manufacturing |
| KR100757552B1 (ko) * | 2000-07-25 | 2007-09-10 | 동경 엘렉트론 주식회사 | 열처리장치, 열처리방법 및 기록매체 |
| JP3421660B2 (ja) * | 2001-05-09 | 2003-06-30 | 東京エレクトロン株式会社 | 熱処理装置及びその方法 |
| KR100499211B1 (ko) * | 2001-11-13 | 2005-07-07 | 가부시키가이샤 히다치 고쿠사이 덴키 | 반도체 장치의 제조 방법 및 기판 처리 장치 |
-
2003
- 2003-01-08 WO PCT/JP2003/000068 patent/WO2003060970A1/ja not_active Ceased
- 2003-01-08 US US10/500,931 patent/US7163849B2/en not_active Expired - Fee Related
- 2003-01-08 CN CNA038020181A patent/CN1613142A/zh active Pending
- 2003-01-08 KR KR10-2004-7010421A patent/KR20040085145A/ko not_active Withdrawn
- 2003-01-08 JP JP2003560969A patent/JP4125239B2/ja not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05217910A (ja) * | 1992-02-05 | 1993-08-27 | Seiko Epson Corp | 化合物半導体の気相成長装置及び気相成長方法 |
| JPH07230955A (ja) * | 1994-02-18 | 1995-08-29 | Hitachi Ltd | 気相成長方法とその装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US7163849B2 (en) | 2007-01-16 |
| JP4125239B2 (ja) | 2008-07-30 |
| JPWO2003060970A1 (ja) | 2005-05-19 |
| US20050020039A1 (en) | 2005-01-27 |
| CN1613142A (zh) | 2005-05-04 |
| KR20040085145A (ko) | 2004-10-07 |
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