WO2002082523A1 - Heat treating method and heat treating device - Google Patents
Heat treating method and heat treating device Download PDFInfo
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- WO2002082523A1 WO2002082523A1 PCT/JP2002/002377 JP0202377W WO02082523A1 WO 2002082523 A1 WO2002082523 A1 WO 2002082523A1 JP 0202377 W JP0202377 W JP 0202377W WO 02082523 A1 WO02082523 A1 WO 02082523A1
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- gas
- reaction vessel
- processing gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/06—Apparatus for monitoring, sorting, marking, testing or measuring
- H10P72/0604—Process monitoring, e.g. flow or thickness monitoring
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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
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
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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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- 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
- C23C16/4408—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber by purging residual gases from the reaction chamber or gas lines
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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
- C23C16/4412—Details relating to the exhausts, e.g. pumps, filters, scrubbers, particle traps
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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
- C23C16/45519—Inert gas curtains
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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
- C23C16/45561—Gas plumbing upstream of the reaction chamber
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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
- C23C16/45563—Gas nozzles
- C23C16/45568—Porous nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
- F27B17/0016—Chamber type furnaces
- F27B17/0025—Chamber type furnaces specially adapted for treating semiconductor wafers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/63—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the formation processes
- H10P14/6326—Deposition processes
- H10P14/6328—Deposition from the gas or vapour phase
- H10P14/6334—Deposition from the gas or vapour phase using decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/66—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the type of materials
- H10P14/668—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the type of materials the materials being characterised by the deposition precursor materials
- H10P14/6681—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the type of materials the materials being characterised by the deposition precursor materials the precursor containing a compound comprising Si
- H10P14/6682—Formation of materials, e.g. in the shape of layers or pillars of insulating materials characterised by the type of materials the materials being characterised by the deposition precursor materials the precursor containing a compound comprising Si the compound being a silane, e.g. disilane, methylsilane or chlorosilane
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/60—Formation of materials, e.g. in the shape of layers or pillars of insulating materials
- H10P14/69—Inorganic materials
- H10P14/694—Inorganic materials composed of nitrides
- H10P14/6943—Inorganic materials composed of nitrides containing silicon
- H10P14/69433—Inorganic materials composed of nitrides containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
Definitions
- the present invention relates to a heat treatment apparatus and a heat treatment method for performing heat treatment while supplying a processing gas to an object to be processed. Background technology
- the vertical heat treatment apparatus As one of manufacturing processes of a semiconductor device, there is a process in which a film is formed on an object to be processed by a method called low-pressure chemical vapor deposition (CVD).
- CVD low-pressure chemical vapor deposition
- a vertical heat treatment apparatus As an apparatus for performing such a film forming process, for example, a vertical heat treatment apparatus as shown in FIG. 9 is used.
- This vertical heat treatment apparatus performs heat treatment on an object to be processed in a batch system.
- the vertical heat treatment apparatus includes a cylindrical reaction tube 10 composed of a double tube of an inner tube 11 and an outer tube 12 made of quartz.
- a wafer boat 13 holding a large number of semiconductor wafers (hereinafter, referred to as wafers) W to be processed is loaded into the reaction tube 10 from below the reaction tube 10.
- the inside of the reaction tube 10 is evacuated by a vacuum pump (not shown) through an exhaust pipe 14 to be a reduced pressure atmosphere.
- a processing gas is introduced into the reaction tube 10.
- a heater (not shown) surrounds a side circumference of the reaction tube 10. The film is formed on the wafer W by the heating by the heater.
- the film-forming process is, for example, a film forming process of the silicon nitride film, is easy, for example, ammonia (NH 3) gas and dichlorosilane (S iH 2 C 1 2) is c gas supply system in this case used as a process gas Will be described.
- Ammonia gas is supplied from a gas supply source 15a via a gas pipe 16a
- dichlorosilane gas is supplied from a gas supply source 15b into a reaction tube 10 via a gas pipe 16b.
- nitrogen gas as a purge gas is supplied from the gas supply source 15 c through the gas tube 16 c between the inner tube 11 and the outer tube 12. It has become so.
- Vc 1 and Vc 2 are pulp, and Mc is a flow control unit.
- Mc is a flow control unit.
- the valve Val and the flow control section Ma And a valve Va2.
- the gas pipe 16b is provided with a valve Vbl, a flow control unit Mb, and a valve Vb2.
- the above processing gas is toxic. Therefore, if the processed wafer W is immediately taken out of the reaction tube 10 after the film forming process is completed, the toxic remaining in the reaction tube 10 and the processing gas supply gas tubes 16a and 16b communicating therewith. Process gas may leak out. For this reason, after the completion of the film forming process, nitrogen gas is passed from the gas supply source 15c to the gas pipes 16a and 16b as a replacement gas (purge gas) so that the remaining processing gas can be replaced with nitrogen gas.
- a replacement gas purge gas
- the gas pipe 16c is branched into four branches 17a, 17b, 18a, and 18b upstream of the flow controller Mc.
- Branches 17a and 18a are connected to the upstream and downstream sides of the gas pipe 16a with respect to the flow control section Ma
- the branch paths 17b and 18b are connected to the upstream and downstream of the gas pipe 16b with respect to the flow control section Mb.
- the branch path 17a is provided with the valve Va3
- the branch path 17b is provided with the valve Vb3
- the branch path 18a is provided with the flow control section Md and the valve Va4 in order from the upstream side
- the branch path 18b is provided with the upstream side.
- the flow rate control unit Me and the valve Vb 4 are connected to the gas pipes 16 a and 16 b for supplying the processing gas, respectively, as shown in c and Is being done.
- the reason is that the flow rate adjustment range of the processing gas is small, and the maximum flow rates of the flow rate control units Ma and Mb are small. That is, the branch passages 18a and 18b are provided to secure the flow rate of the nitrogen gas.
- the present inventors are studying, for example, a method shown in FIG. First, at time t1 when the film forming process is completed, supply of all gases into the gas pipes 16a and 16b is stopped. As a result, the process gas is discharged to the exhaust path 14 so that the process pressure 13.3 Pa (0.1 t 0 rr) up to that time is reduced to 0.133 Pa. However, the rate at which process gases are discharged gradually decreases. Therefore, in order to increase the pressure inside the reaction tube 10 to the original process pressure and increase the probability of collision between the nitrogen gas molecules and the processing gas molecules, the gas tubes 16a and 16a are used. And the supply of nitrogen gas to 16b is started (time t2).
- the dilution ratio of the process gas remaining in the reaction tube 1 in the 0 is reduced to 1. 0 X 1 0- 2.
- the processing gas is discharged to the exhaust path 14 side so that the pressure is reduced at once (time t3).
- the residual concentration in the treated gas becomes 1. 0 x 1 0- 4 degree.
- Such is lowered to the reaction tube 1 processing example 1 dilution ratio less safety level of the gas within 0. 0 X 1 0- 1 4 .
- the present invention has been made based on such circumstances, and an object of the present invention is to provide a heat treatment apparatus and a heat treatment method for supplying a processing gas to a processing object to perform a heat treatment, from loading to unloading of the processing object.
- a technology that can reduce the time required for the project.
- the present invention provides a reaction container into which an object to be processed is loaded and unloaded, a processing gas introduction unit for introducing a processing gas into the reaction container, and a processing gas introduction unit, which are separately provided.
- a replacement gas introduction unit for introducing a replacement gas into the vessel, an exhaust unit for exhausting the gas in the reaction vessel, and a connection to the processing gas introduction unit, the replacement gas introduction unit, and the exhaust unit.
- the pressure in the reaction vessel is controlled to be lower than that during the heat treatment by controlling the exhaust part, and then the introduction of the processing gas is stopped by controlling the processing gas introduction part and the replacement gas introduction part.
- a control unit a heat treatment apparatus characterized by comprising a.
- the gas replacement process in the reaction vessel can be completed in a short time. And the process can be promptly shifted to the unloading process of the object.
- the processing gas introduction unit is provided with a processing gas flow path for introducing a processing gas into the reaction vessel, and a first opening / closing part that is provided near the reaction vessel and opens and closes the processing gas flow path.
- Means, and the control unit controls the first opening / closing means.
- the exhaust unit is provided in an exhaust path for discharging gas in the reaction vessel, and is provided in the exhaust path, and adjusts the opening and closing of the exhaust path to increase the pressure in the reaction vessel.
- a pressure adjusting unit for adjusting the pressure, wherein the control unit controls the pressure adjusting unit.
- the heat treatment apparatus opens and closes the bypass passage connecting the upstream side of the processing gas flow passage with respect to the first opening / closing means and the exhaust passage so as to bypass the reaction vessel. It is preferable to further include a second opening / closing means.
- a sub-replacement gas introduction section for introducing a replacement gas into the processing gas flow path is provided at an upstream portion of the processing gas flow path with respect to a connection portion of the bypass path. I have.
- the sub-replacement gas introduction unit includes a sub-replacement gas passage for introducing a replacement gas into the processing gas passage, and a third opening and closing the sub-replacement gas passage. Opening / closing means.
- control unit is also connected to the second opening / closing unit and the third opening / closing unit, and controls the first opening / closing unit and the third opening / closing unit to stop the introduction of the processing gas.
- the replacement gas is introduced into the processing gas flow path to bring the pressure inside the processing gas flow path into a pressurized state, and then the gas in the processing gas flow path is controlled by controlling the second opening / closing means through the bypass path. Through the exhaust.
- the gas replacement processing in the processing gas flow path can be performed while the object to be processed is being carried in and out of the reaction container. Therefore, the throughput is improved.
- the present invention provides a reaction vessel into which an object to be processed is loaded and unloaded, a processing gas introduction unit for introducing a processing gas into the reaction vessel, and a processing gas introduction unit, which is provided separately.
- a replacement gas introduction unit for introducing a replacement gas into the reaction vessel A method for heat-treating an object to be processed using a heat-treating device comprising: an exhaust unit for exhausting gas in the reaction vessel, wherein the method is performed after the heat treatment, and controls the exhaust unit to perform the reaction.
- a first depressurizing step of lowering the pressure in the vessel from that at the time of the heat treatment, and a first depressurizing step that is performed after the first depressurizing step, and controls the processing gas introduction unit and the replacement gas introduction unit to introduce the processing gas. Stopping and introducing the replacement gas into the reaction vessel and controlling the exhaust section to increase the pressure in the reaction vessel to be higher than that during the heat treatment; And a second pressure reducing step of controlling the pressure inside the reaction vessel to be lower than that during the heat treatment.
- the present invention provides a reaction vessel into which an object to be processed is loaded and unloaded, a processing gas introduction unit for introducing a processing gas into the reaction vessel, and the processing gas introduction unit, which is provided separately.
- a replacement gas introduction unit for introducing a replacement gas into the reaction vessel; and an exhaust unit for discharging gas from the reaction vessel, wherein the processing gas introduction unit performs processing in the reaction vessel.
- a processing gas flow path for introducing a gas, and first opening / closing means provided near the reaction vessel and configured to open and close the processing gas flow path.
- the processing gas flow path is provided in an upstream portion of the processing gas flow path with respect to a connection portion of the bypass path.
- a sub-replacement gas introduction unit for introducing a replacement gas is provided in the inside, and the sub-replacement gas introduction unit is a sub-replacement gas introduction unit for introducing a replacement gas into the processing gas flow path.
- a third opening / closing means for opening / closing the sub-replacement gas flow path.
- FIG. 1 is a schematic configuration diagram showing one embodiment of a heat treatment apparatus according to the present invention.
- FIG. 2 is a longitudinal sectional view showing the reaction vessel of FIG.
- FIG. 3 is a cross-sectional view showing the reaction vessel of FIG.
- FIG. 4 is a vertical cross-sectional view illustrating a distal end portion of a gas pipe for introducing nitrogen gas.
- FIG. 5 is an explanatory diagram for explaining the operation of the heat treatment apparatus of FIG.
- FIG. 6 is a characteristic diagram for explaining a process of exhausting a processing gas from a reaction vessel in the heat treatment apparatus in FIG.
- FIG. 7 is an explanatory diagram for explaining the operation of the heat treatment apparatus of FIG.
- FIG. 8 is an explanatory diagram for explaining the operation of the heat treatment apparatus of FIG.
- FIG. 9 is a schematic configuration diagram showing a heat treatment apparatus according to a conventional technique.
- FIG. 10 is a characteristic diagram for explaining a process of exhausting a processing gas from a reaction vessel in the related art.
- FIG. 1 is an overall schematic diagram showing one embodiment of a heat treatment apparatus according to the present invention.
- the vertical heat treatment apparatus of the present embodiment includes a reaction vessel 2.
- FIG. 2 is a longitudinal sectional view showing the reaction vessel 2.
- the reaction tube 21 shown in FIG. 2 is made of, for example, quartz.
- the reaction tube 21 has, for example, a double tube structure including an inner tube 22 and an outer tube 23.
- the outer tube 23 is provided so as to form an appropriate space coaxially with the inner tube 22.
- the upper end of the outer tube 23 is closed, and the lower side thereof is airtightly connected to a manifold 24 which is a metal cylindrical body.
- the upper end of the inner pipe 22 is open c.
- the inner pipe 22 is supported by a support ring 25 protruding from the inner peripheral surface of the manifold 24.
- the wafer W to be processed is placed in a shelf on a wafer boat (holding fixture) 27.
- the boat elevator 26 is moved from the lower opening of the manifold 24 to the wafer boat. (Holder) 27 is carried into the inner tube 22.
- the inner tube 22 forms a heat treatment atmosphere for the wafer W to be processed.
- the boat elevator 26 is provided with a lid 28 capable of closing the lower opening of the manifold 24.
- a heat insulator 29 a is provided so as to surround the periphery of the reaction tube 21.
- a heater 29b made of a resistance heating body is provided on the inner wall surface of the heat insulator 29a. Heat insulator 29 a and heater 29 b constitute heating furnace 29.
- a portion of the manifold 24 below the support ring 25 is a plurality of gas inlet pipes for introducing a processing gas, a replacement gas, and the like into the reaction vessel 2 (only one is illustrated in the figure for convenience). Is penetrating. In order to supply the gas along the inner surface of the inner tube 22, the tip of the gas inlet tube is bent upward.
- the gas introduction pipes correspond to the gas pipes 5 and 6 as the processing gas flow paths and the gas pipe 7 as the replacement gas flow path.
- an exhaust port 30 is formed on the peripheral surface of the manifold 24 above the support ring 25.
- a gas pipe 4 for introducing nitrogen gas passes through a portion of the manifold 24 above the support ring 25. ing.
- An exhaust pipe 3 forming an exhaust path is hermetically connected to the exhaust port 30.
- a vacuum pump 32 is connected to the exhaust pipe 3 via a pressure adjusting means 31.
- the pressure adjusting means 31 can be constituted by an appropriate means for adjusting the degree of engagement of the exhaust pipe 3.
- the control unit 100 controls the pressure adjusting means 31 in accordance with the pressure measurement value obtained from the pressure gauge 101 for measuring the pressure in the reaction vessel 2, that is, the opening adjustment of the exhaust pipe 3. To do that.
- the control unit 100 controls not only the pressure adjusting unit 31 but also all the valves used in the present embodiment.
- the valve unit 51 includes a valve 5 la as a first opening / closing unit and a second opening unit. This is a combination of a valve 51b and a closing means.
- the valve unit 61 is also a combination of the valve 61a as the first opening / closing means and the valve 61b as the second opening / closing means.
- the nozzles 5 la and 6 la open and close the gas pipes 5 and 6, respectively.
- the valves 5 1 b and 6 lb respectively branch off from the upstream portions of the gas pipes 5 and 6 with respect to the valves 51 a and 6 la and join the exhaust pipe 3 (connected). It opens and closes 2, 62.
- the two bypass paths 52 and 62 join on the way (before being connected to the exhaust pipe 3) and are connected at a connection point P1 of the exhaust pipe 3.
- the gas pipe 7 communicates with the tip 70 via a valve 71 provided near the reaction vessel 2.
- the tip portion 70 protrudes into the inner tube 22.
- valve units 51 and 61 and the valve 71 are fixed to a common fixing member 20 provided, for example, near the reaction vessel 2.
- the reaction vessel 2 also includes, in addition to the gas pipes 4 to 7 described above, for example, a cleaning gas introduction pipe for removing deposits attached to the inner wall. It can be provided so as to protrude into the inside.
- the tip of the gas pipe 7 is covered with a ceramic porous layer described in, for example, JP-A-2000-58530.
- the ceramic porous layer is, for example, a silica porous layer 9 as shown in FIG.
- the silica porous layer 9 is formed as a cylindrical body whose upper end is closed, and is fixed to the tip of the gas pipe 7 by welding.
- the thickness of the porous silica layer 9 is, for example, 10 to 50 mm.
- the gas pipe 4 and the gas pipe 7 are both provided for supplying nitrogen gas into the reaction vessel 2. Therefore, the base ends of these gas pipes 4 and 7 are commonly connected to a nitrogen gas supply source 4b via a valve 4a.
- Gas tube 5 for example, ammonia (NH 3) is intended to supply the gas
- gas tube 6 is to supply dichlorosilane (S i H 2 C 1 2 ) gas.
- the base end side of the gas pipe 5 with respect to the valve unit 51 is connected to a gas supply source 56 of ammonia gas via a valve 53, a flow control unit 54 and a valve 55.
- the base end of the gas pipe 6 with respect to the valve unit 61 is connected to a gas supply source 66 of dichlorosilane gas via a valve 63, a flow rate control unit 64 and a valve 65.
- the gas pipes 5 and 6 are connected to branch paths 8a and 8b, which are sub-replacement gas flow paths branched from between the valve 4a of the gas pipe 4 and the flow control section 43, respectively. I have. As a result, nitrogen gas can be introduced into the gas pipes 5 and 6 from the nitrogen gas supply source 4b.
- the tip of the branch 8a is connected to a point P2 between the flow control part 54 and the valve 55 in the gas pipe 5.
- the distal end of the branch 8b is connected to a point P3 between the flow control unit 64 and the valve 65 in the gas pipe 6.
- a valve 81 corresponding to a third opening / closing means is interposed in the branch passage 8a.
- a valve 82 corresponding to a third opening / closing means is also provided in the branch passage 8b.
- a silicon nitride film is formed as an example.
- 150 wafers W are placed on the wafer boat 27 in a shelf shape.
- the wafer boat 27 is opened by the boat elevator 26 on the lower side of the manifold 24. From the inner pipe 22. This opening is hermetically sealed by the lid 28.
- the inside of the reaction tube 21 is heated to, for example, about 760 ° C. by the heater 29.
- Ru is adjusted in the reaction tube 2 1 pressure in 1, for example, 3 3 X 1 0 1 P a (1. 0 x 1 O ⁇ T 0 rr).
- FIG. 5 shows the gas flow in this film forming process.
- the processing gas flows through the gas pipes 5 and 6.
- nitrogen gas flows through the gas pipe 4 in order to prevent a reaction product generated by the reaction of the processing gas from adhering to the inner wall of the outer pipe 23.
- the gas pipe 7 does not flow nitrogen gas because the valve 72 is closed.
- valves 81 and 82 are also closed, nitrogen gas does not flow downstream of the valves 81 and 82 in the branch passages 8a and 8b. Also, during the film forming process, the valves 51 b and 6 lb on the branch path side in the valve units 51 and 61 are closed in any of the gas pipes 5 and 6 through which gas flows. Therefore, the suction force of the vacuum pump 32 extends only to the reaction tube 21 side.
- the control unit 100 controls the pressure adjusting means 3 1 so that the inside of the reaction vessel 2 is maintained at the above-described process pressure, for example, 133 ⁇ 10 ⁇ (1.0 ⁇ 1 O ⁇ Torr). Is controlling.
- FIG. 6 is a characteristic diagram showing the temporal change of the internal pressure in the reaction vessel 2 and also showing the residual concentration (dilution ratio) of the processing gas.
- the valves 55 and 65 are closed and the flow of the processing gas to the gas pipes 5 and 6 is stopped.
- the valves 51a and 61a are closed, and the pressure adjusting means 31 is fully opened (see Fig. 7).
- the inside of the reaction vessel 2 rapidly shifts to a reduced pressure state.
- the pressure in the reaction vessel 2 is maintained, for example, in 1 3 3 X 1 0- 3 P a (1. 0 X 1 0- 3 T orr).
- the pressure adjusting means 31 is once closed, the valve 71 is opened, and introduction of nitrogen gas from the gas pipe 7 is started. Thereafter, the pressure in the reaction vessel 2 is increased to a pressure equal to or higher than the film forming process while replacing the replacement gas with the processing gas remaining in the reaction vessel 2 (the exhaust from the reaction vessel 2 is continued).
- This pressurization step is performed for the purpose of introducing nitrogen gas into the reaction vessel 2 to increase the pressure inside the reaction vessel 2 and increasing the probability of collision between the remaining processing gas molecules and the nitrogen gas molecules. Thereby, more processing gas can be discharged in the pressure reduction step performed later. This rise In the pressure step, the nitrogen gas from the gas pipe 7 flows into the reaction vessel 2 at a stretch.
- the silica porous layer 9 is provided at the gas outlet of the gas pipe 7, the nitrogen gas diffuses uniformly and is introduced at a large flow rate without winding up the particles in the reaction vessel 2.
- the reaction vessel 2 is pressurized up to for example 1 3 3 X 1 0 2 P a, dilution of the process gas is, for example, 1. 0 xl 0- z.
- the pressure adjusting means 31 is relaxed.
- the reaction vessel 2 is reduced for example to previously first time the same 1 3 3 X 1 0- 3 and during depressurization step of P a was performed.
- the processing gas is exhausted together with the nitrogen gas.
- About 0 X 1 0- 1 4 For example the following safety dilution ratio that can be opened dilution ratio e.g. the reaction vessel 2 of the processing gas in the reaction vessel 2 Is done.
- the time for maintaining the reduced pressure state is, for example, about 5 minutes.
- the reaction vessel 2 in the remaining processing example 1 dilution ratio less safe dilution gas 0 X 1 0 -.
- the reaction container 2 After being lowered to 1 4, when the reaction container 2 starts to be returned to atmospheric pressure, in parallel thereto Then, the work for replacing the processing gas remaining in the processing gas supply gas pipes 5 and 6 with nitrogen gas is started. That is, while the wafer boat 27 is lowered and the wafer W is unloaded from the wafer boat 27 on the reaction vessel 2 side, the processing gas in the gas pipes 5 and 6 is simultaneously replaced.
- the valve 71 is closed from the state of FIG. 7, and the supply of the nitrogen gas to the reaction vessel 2 is stopped.
- the valves 81 and 82 are opened, and nitrogen gas is introduced into the gas pipes 5 and 6 from the branch passages 8a and 8b.
- the valves 51 a and 51 b and the valves 6 la and 61 are both closed in the nor units 51 and 61, and the bypass lines 52 and 62 and the gas pipes 5 and 6 are closed. There is no communication between them. For this reason, the inside of the gas pipe 5 and the inside of the gas pipe 6 are pressurized at once by the pressure of the nitrogen gas supplied from the upstream side.
- the valves 51 a and 61 a serving as the first opening / closing means are provided in the vicinity of the respective reaction vessels 2 of the gas pipes 5 and 6 for supplying the processing gas. For this reason, after the film formation process is completed, the space for discharging the processing gas inside is separated, first the pressure in the reaction vessel 2 is reduced, and then nitrogen gas is introduced into the reaction vessel 2 from the gas pipe 7 to perform the reaction. The pressure in the vessel 2 is set to a pressure higher than the pressure at the time of the heat treatment, and then the pressure in the reaction vessel 2 is reduced again. As a result, the gas replacement process in the reaction vessel 2 is completed in a short time, and the process can be promptly shifted to the unloading process of the wafer W.
- the concentration of the processing gas in the reaction vessel is below the safety standard value.
- the time required to reach about 25 minutes was, for example, about 25 minutes in the sequence using the apparatus shown in FIG. 9 described in the section of the related art, but was about 15 minutes in the sequence in the present embodiment.
- the gas replacement processing of the gas pipes 5 and 6, which are the processing gas channels, is performed. Therefore, the throughput of the gas replacement process in the gas pipes 5 and 6 does not affect the throughput. It is effective to remove residual gas from the gas pipes 5 and 6 in order to perform the next heat treatment well.
- vacuum evacuation is first performed with the valves 51a and 61a open, and then the valves 51a and 61a are closed and the replacement gas is introduced into the reaction vessel 2.
- a step of making the pressure higher than the pressure at the time of the heat treatment may be performed.
- the reaction vessel 2 has a double tube structure.
- the present invention can also be applied to an apparatus using a single-tube reaction vessel, for example.
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Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02705146A EP1381079B1 (en) | 2001-03-30 | 2002-03-13 | Heat treating method |
| US10/473,249 US6814572B2 (en) | 2001-03-30 | 2002-03-13 | Heat treating method and heat treating device |
| DE60217317T DE60217317T8 (de) | 2001-03-30 | 2002-03-13 | Wärmebehandlungsverfahren |
| KR1020037011124A KR100590131B1 (ko) | 2001-03-30 | 2002-03-13 | 열처리 장치 및 열처리 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-98044 | 2001-03-30 | ||
| JP2001098044A JP3403181B2 (ja) | 2001-03-30 | 2001-03-30 | 熱処理装置及び熱処理方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002082523A1 true WO2002082523A1 (en) | 2002-10-17 |
Family
ID=18951740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2002/002377 Ceased WO2002082523A1 (en) | 2001-03-30 | 2002-03-13 | Heat treating method and heat treating device |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6814572B2 (ja) |
| EP (2) | EP1657741A1 (ja) |
| JP (1) | JP3403181B2 (ja) |
| KR (1) | KR100590131B1 (ja) |
| CN (1) | CN1215538C (ja) |
| DE (1) | DE60217317T8 (ja) |
| WO (1) | WO2002082523A1 (ja) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4074461B2 (ja) * | 2002-02-06 | 2008-04-09 | 東京エレクトロン株式会社 | 成膜方法および成膜装置、半導体装置の製造方法 |
| JP3985899B2 (ja) * | 2002-03-28 | 2007-10-03 | 株式会社日立国際電気 | 基板処理装置 |
| JP4421393B2 (ja) * | 2004-06-22 | 2010-02-24 | 東京エレクトロン株式会社 | 基板処理装置 |
| US20050287806A1 (en) * | 2004-06-24 | 2005-12-29 | Hiroyuki Matsuura | Vertical CVD apparatus and CVD method using the same |
| KR100609065B1 (ko) * | 2004-08-04 | 2006-08-10 | 삼성전자주식회사 | 산화막 형성 장치 및 방법 |
| US7425692B2 (en) * | 2004-09-07 | 2008-09-16 | Btu International, Inc. | Thermal processing system having slot eductors |
| US7966969B2 (en) * | 2004-09-22 | 2011-06-28 | Asm International N.V. | Deposition of TiN films in a batch reactor |
| US20060156980A1 (en) * | 2005-01-19 | 2006-07-20 | Samsung Electronics Co., Ltd. | Apparatus including 4-way valve for fabricating semiconductor device, method of controlling valve, and method of fabricating semiconductor device using the apparatus |
| JP4506677B2 (ja) * | 2005-03-11 | 2010-07-21 | 東京エレクトロン株式会社 | 成膜方法、成膜装置及び記憶媒体 |
| JP4698354B2 (ja) * | 2005-09-15 | 2011-06-08 | 株式会社リコー | Cvd装置 |
| US7691757B2 (en) | 2006-06-22 | 2010-04-06 | Asm International N.V. | Deposition of complex nitride films |
| JP4273145B2 (ja) * | 2006-09-13 | 2009-06-03 | エスペック株式会社 | 熱処理装置 |
| KR100872312B1 (ko) * | 2007-05-04 | 2008-12-05 | 주식회사 디엠에스 | 에칭가스 제어시스템 |
| US7629256B2 (en) | 2007-05-14 | 2009-12-08 | Asm International N.V. | In situ silicon and titanium nitride deposition |
| US20090197424A1 (en) * | 2008-01-31 | 2009-08-06 | Hitachi Kokusai Electric Inc. | Substrate processing apparatus and method for manufacturing semiconductor device |
| US20090212014A1 (en) * | 2008-02-27 | 2009-08-27 | Tokyo Electron Limited | Method and system for performing multiple treatments in a dual-chamber batch processing system |
| US7833906B2 (en) | 2008-12-11 | 2010-11-16 | Asm International N.V. | Titanium silicon nitride deposition |
| JP5966649B2 (ja) * | 2012-06-18 | 2016-08-10 | 東京エレクトロン株式会社 | 熱処理装置 |
| US20140038421A1 (en) * | 2012-08-01 | 2014-02-06 | Taiwan Semiconductor Manufacturing Company, Ltd. | Deposition Chamber and Injector |
| JP6020227B2 (ja) * | 2013-02-12 | 2016-11-02 | 東京エレクトロン株式会社 | ガス供給系及び成膜装置 |
| KR20160026572A (ko) * | 2014-09-01 | 2016-03-09 | 삼성전자주식회사 | 기판 처리 장치 |
| JP6486160B2 (ja) | 2015-03-23 | 2019-03-20 | 東京エレクトロン株式会社 | 熱処理装置 |
| JP2018186235A (ja) * | 2017-04-27 | 2018-11-22 | 東京エレクトロン株式会社 | 基板処理装置、インジェクタ内のパーティクル除去方法及び基板処理方法 |
| US11393703B2 (en) * | 2018-06-18 | 2022-07-19 | Applied Materials, Inc. | Apparatus and method for controlling a flow process material to a deposition chamber |
| JP7027565B2 (ja) * | 2018-09-11 | 2022-03-01 | 株式会社Kokusai Electric | 基板処理装置、半導体装置の製造方法およびプログラム |
| JP6651591B1 (ja) * | 2018-09-27 | 2020-02-19 | 株式会社Kokusai Electric | 基板処理装置、半導体装置の製造方法 |
| JP7487084B2 (ja) * | 2020-12-07 | 2024-05-20 | 株式会社Screenホールディングス | 熱処理装置 |
| JP7687791B2 (ja) | 2021-03-15 | 2025-06-03 | 東京エレクトロン株式会社 | 温調ユニット及び処理装置 |
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| JPH0774104A (ja) * | 1993-08-31 | 1995-03-17 | Sony Corp | 反応炉 |
| US6171104B1 (en) * | 1998-08-10 | 2001-01-09 | Tokyo Electron Limited | Oxidation treatment method and apparatus |
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| US4369031A (en) * | 1981-09-15 | 1983-01-18 | Thermco Products Corporation | Gas control system for chemical vapor deposition system |
| US5484484A (en) * | 1993-07-03 | 1996-01-16 | Tokyo Electron Kabushiki | Thermal processing method and apparatus therefor |
| US5920797A (en) * | 1996-12-03 | 1999-07-06 | Applied Materials, Inc. | Method for gaseous substrate support |
| KR100505310B1 (ko) * | 1998-05-13 | 2005-08-04 | 동경 엘렉트론 주식회사 | 성막 장치 및 방법 |
| KR100282853B1 (ko) * | 1998-05-18 | 2001-04-02 | 서성기 | 연속기체분사에의한반도체박막증착장치 |
| US6645302B2 (en) * | 2000-04-26 | 2003-11-11 | Showa Denko Kabushiki Kaisha | Vapor phase deposition system |
-
2001
- 2001-03-30 JP JP2001098044A patent/JP3403181B2/ja not_active Expired - Fee Related
-
2002
- 2002-03-13 EP EP06000518A patent/EP1657741A1/en not_active Withdrawn
- 2002-03-13 US US10/473,249 patent/US6814572B2/en not_active Expired - Lifetime
- 2002-03-13 EP EP02705146A patent/EP1381079B1/en not_active Expired - Lifetime
- 2002-03-13 WO PCT/JP2002/002377 patent/WO2002082523A1/ja not_active Ceased
- 2002-03-13 DE DE60217317T patent/DE60217317T8/de active Active
- 2002-03-13 KR KR1020037011124A patent/KR100590131B1/ko not_active Expired - Fee Related
- 2002-03-13 CN CNB028057635A patent/CN1215538C/zh not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0774104A (ja) * | 1993-08-31 | 1995-03-17 | Sony Corp | 反応炉 |
| US6171104B1 (en) * | 1998-08-10 | 2001-01-09 | Tokyo Electron Limited | Oxidation treatment method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1381079A1 (en) | 2004-01-14 |
| EP1381079B1 (en) | 2007-01-03 |
| DE60217317T2 (de) | 2007-07-05 |
| KR20030082605A (ko) | 2003-10-22 |
| DE60217317D1 (de) | 2007-02-15 |
| KR100590131B1 (ko) | 2006-06-15 |
| JP2002299327A (ja) | 2002-10-11 |
| CN1215538C (zh) | 2005-08-17 |
| CN1496582A (zh) | 2004-05-12 |
| EP1381079A4 (en) | 2005-06-29 |
| US6814572B2 (en) | 2004-11-09 |
| JP3403181B2 (ja) | 2003-05-06 |
| US20040115584A1 (en) | 2004-06-17 |
| DE60217317T8 (de) | 2007-10-04 |
| EP1657741A1 (en) | 2006-05-17 |
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