WO2020188654A1 - 半導体装置の製造方法、基板処理装置およびプログラム - Google Patents
半導体装置の製造方法、基板処理装置およびプログラム Download PDFInfo
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- WO2020188654A1 WO2020188654A1 PCT/JP2019/010951 JP2019010951W WO2020188654A1 WO 2020188654 A1 WO2020188654 A1 WO 2020188654A1 JP 2019010951 W JP2019010951 W JP 2019010951W WO 2020188654 A1 WO2020188654 A1 WO 2020188654A1
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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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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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
- C23C16/40—Oxides
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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
- C23C16/40—Oxides
- C23C16/403—Oxides of aluminium, magnesium or beryllium
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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
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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
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
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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
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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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02178—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing aluminium, e.g. Al2O3
Definitions
- the present disclosure relates to a semiconductor device manufacturing method, a substrate processing device, and a program.
- a film forming process for forming a film on a substrate housed in a processing chamber may be performed (see, for example, Patent Document 1).
- Patent Document 1 a raw material gas containing an element such as aluminum and a reaction gas containing an element such as oxygen are sequentially supplied to the processing chamber, and a film is formed on a substrate housed in the processing chamber. Is required to improve the in-plane film thickness uniformity of the film formed on the substrate.
- An object of the present disclosure is to provide a technique for improving the in-plane film thickness uniformity of a film formed on a substrate housed in a processing chamber.
- a step of supplying a raw material gas to a substrate in the processing chamber and a step of supplying a reaction gas having a molecular structure different from that of the raw material gas to the substrate in the processing chamber A step of forming a film on the substrate by performing the above non-simultaneously a predetermined number of times, and in the step of supplying the reaction gas, the substrate in the processing chamber is in a state where the pressure in the processing chamber is not stable.
- a technique for repeatedly supplying the reaction gas to the product and exhausting the reaction gas from the processing chamber a predetermined number of times is provided.
- the substrate processing device 10 is configured as an example of a device used in the manufacturing process of a semiconductor device.
- the substrate processing device 10 includes a processing furnace 202 provided with a heater 207 as a heating means (heating mechanism, heating system).
- the heater 207 has a cylindrical shape and is vertically installed by being supported by a heater base (not shown) as a holding plate.
- an outer tube 203 forming a reaction vessel is arranged concentrically with the heater 207.
- the outer tube 203 is made of a heat-resistant material such as quartz (SiO 2 ) or silicon carbide (SiC), and is formed in a cylindrical shape with the upper end closed and the lower end open.
- a manifold (inlet flange) 209 is arranged concentrically with the outer tube 203.
- the manifold 209 is made of a metal such as stainless steel (SUS), and is formed in a cylindrical shape with open upper and lower ends.
- An O-ring 220a as a sealing member is provided between the upper end portion of the manifold 209 and the outer tube 203.
- the inner tube 204 constituting the reaction vessel is arranged inside the outer tube 203.
- the inner tube 204 is made of a heat-resistant material such as quartz or SiC, and is formed in a cylindrical shape with the upper end closed and the lower end open.
- the processing container (reaction container) is mainly composed of the outer tube 203, the inner tube 204, and the manifold 209.
- a processing chamber 201 is formed in the hollow portion of the processing container (inside the inner tube 204).
- the processing chamber 201 is configured to accommodate the wafer 200 as a substrate in a state of being arranged in multiple stages in the vertical direction in a horizontal posture by a boat 217 described later.
- Nozzles 410 (first nozzle) and 420 (second nozzle) are provided in the processing chamber 201 so as to penetrate the side wall of the manifold 209 and the inner tube 204.
- Gas supply pipes 310 and 320 as gas supply lines are connected to the nozzles 410 and 420, respectively.
- the substrate processing apparatus 10 is provided with two nozzles 410 and 420 and two gas supply pipes 310 and 320, and can supply a plurality of types of gas into the processing chamber 201. It is configured as follows.
- the processing furnace 202 of the present embodiment is not limited to the above-described embodiment.
- the gas supply pipes 310 and 320 are provided with mass flow controllers (MFCs) 312 and 322, which are flow rate controllers (flow control units), in order from the upstream side. Further, the gas supply pipes 310 and 320 are provided with valves 314 and 324, which are on-off valves, respectively. Gas supply pipes 510 and 520 for supplying the inert gas are connected to the downstream sides of the valves 314 and 324 of the gas supply pipes 310 and 320, respectively. The gas supply pipes 510 and 520 are provided with MFCs 512 and 522 and valves 514 and 524, respectively, in this order from the upstream side.
- MFCs mass flow controllers
- Nozzles 410 and 420 are connected to the tips of the gas supply pipes 310 and 320, respectively.
- the nozzles 410 and 420 are configured as L-shaped nozzles, and their horizontal portions are provided so as to penetrate the side wall of the manifold 209 and the inner tube 204.
- the vertical portions of the nozzles 410 and 420 are provided inside the channel-shaped (groove-shaped) spare chamber 201a formed so as to project outward in the radial direction of the inner tube 204 and extend in the vertical direction.
- In the reserve chamber 201a is provided upward along the inner wall of the inner tube 204 (upward in the arrangement direction of the wafer 200).
- the nozzles 410 and 420 are provided so as to extend from the lower region of the processing chamber 201 to the upper region of the processing chamber 201, and a plurality of gas supply holes 410a and 420a are provided at positions facing the wafer 200, respectively. There is. As a result, the processing gas is supplied to the wafer 200 from the gas supply holes (openings) 410a and 420a of the nozzles 410 and 420, respectively.
- a plurality of gas supply holes 410a are provided from the lower part to the upper part of the inner tube 204, each having the same opening area, and further provided with the same opening pitch.
- the gas supply hole 410a is not limited to the above-mentioned form.
- the opening area may be gradually increased from the lower part to the upper part of the inner tube 204. This makes it possible to make the flow rate of the gas supplied from the gas supply hole 410a more uniform.
- a plurality of gas supply holes 420a are provided from the lower part to the upper part of the inner tube 204, each having the same opening area, and further provided with the same opening pitch.
- the gas supply hole 420a is not limited to the above-mentioned form.
- the opening area may be gradually increased from the lower part to the upper part of the inner tube 204. This makes it possible to make the flow rate of the gas supplied from the gas supply hole 420a more uniform.
- a plurality of gas supply holes 410a and 420a of the nozzles 410 and 420 are provided at height positions from the lower part to the upper part of the boat 217, which will be described later. Therefore, the processing gas supplied into the processing chamber 201 from the gas supply holes 410a and 420a of the nozzles 410 and 420 is the wafer 200 accommodated from the lower part to the upper part of the boat 217, that is, the wafer 200 accommodated in the boat 217. It is supplied to the whole area.
- the nozzles 410 and 420 may be provided so as to extend from the lower region to the upper region of the processing chamber 201, but are preferably provided so as to extend to the vicinity of the ceiling of the boat 217.
- a raw material gas containing a metal element (metal-containing gas, raw material gas) is supplied into the processing chamber 201 as a processing gas via the MFC 312, the valve 314, and the nozzle 410.
- the raw material for example, trimethylaluminum (Al (CH 3 ) 3 ) as an aluminum-containing raw material (Al-containing raw material gas, Al-containing gas) which is a metal-containing raw material gas (metal-containing gas) containing aluminum (Al) which is a metal element.
- TMA is an organic raw material and is an alkylaluminum in which an alkyl group is bonded to aluminum.
- reaction gas as the processing gas is supplied into the processing chamber 201 via the MFC 322, the valve 324, and the nozzle 420.
- the reaction gas contains oxygen (O), and an oxygen-containing gas (oxidizing gas, oxidizing agent) as a reaction gas (reactant) that reacts with Al is used.
- oxygen-containing gas for example, can be used ozone (O 3) gas.
- the raw material gas which is a metal-containing gas is supplied into the processing chamber 201 from the gas supply hole 410a of the nozzle 410, and the reaction gas which is an oxygen-containing gas is supplied into the processing chamber 201 from the gas supply hole 420a of the nozzle 420.
- the raw material gas (metal-containing gas) and the reaction gas (oxygen-containing gas) are supplied to the surface of the wafer 200, and a metal oxide film is formed on the surface of the wafer 200.
- nitrogen (N 2 ) gas as an inert gas is supplied into the processing chamber 201 via the MFC 512 and 522, the valves 514 and 524, and the nozzles 410 and 420, respectively.
- N 2 gas is used as the inert gas.
- the inert gas for example, argon (Ar) gas, helium (He) gas, neon (Ne) gas, in addition to N 2 gas, will be described.
- Xenon (Xe) gas and other rare gases may be used.
- the processing gas supply system is mainly composed of gas supply pipes 310, 320, MFC 312, 322, valves 314, 324, and nozzles 410, 420, but only nozzles 410, 420 may be considered as the processing gas supply system.
- the treated gas supply system can also be simply referred to as a gas supply system.
- the raw material gas supply system is mainly composed of the gas supply pipe 310, the MFC 312, and the valve 314, but the nozzle 410 may be included in the raw material gas supply system.
- the raw material gas supply system can also be referred to as a raw material supply system.
- the raw material gas supply system can also be referred to as a metal-containing raw material gas supply system.
- the reaction gas supply system is mainly composed of the gas supply pipe 320, the MFC 322, and the valve 324, but the nozzle 420 may be included in the reaction gas supply system.
- an oxygen-containing gas is supplied as a reaction gas from the gas supply pipe 320
- the reaction gas supply system can also be referred to as an oxygen-containing gas supply system.
- the inert gas supply system is mainly composed of gas supply pipes 510, 520 and MFC 512,522, and valves 514,524.
- the inert gas supply system can also be referred to as a purge gas supply system, a dilution gas supply system, or a carrier gas supply system.
- the method of gas supply in the present embodiment is in the annular vertically long space defined by the inner wall of the inner tube 204 and the ends of the plurality of wafers 200, that is, in the spare chamber 201a in the cylindrical space.
- Gas is conveyed via the nozzles 410 and 420 arranged in.
- gas is ejected into the inner tube 204 from a plurality of gas supply holes 410a and 420a provided at positions facing the wafers of the nozzles 410 and 420. More specifically, the gas supply hole 410a of the nozzle 410 and the gas supply hole 420a of the nozzle 420 eject the raw material gas or the like in the direction parallel to the surface of the wafer 200, that is, in the horizontal direction.
- the exhaust hole (exhaust port) 204a is a through hole formed on the side wall of the inner tube 204 at a position facing the nozzles 410 and 420, that is, at a position 180 degrees opposite to the spare chamber 201a, and is, for example, vertical. It is a slit-shaped through hole that is elongated in the direction. Therefore, the gas supplied into the processing chamber 201 from the gas supply holes 410a and 420a of the nozzles 410 and 420 and flowing on the surface of the wafer 200, that is, the residual gas (residual gas) is inner through the exhaust holes 204a. It flows into the exhaust passage 206 formed by the gap formed between the tube 204 and the outer tube 203. Then, the gas that has flowed into the exhaust passage 206 flows into the exhaust pipe 231 and is discharged to the outside of the processing furnace 202.
- the exhaust holes 204a are provided at positions facing the plurality of wafers 200 (preferably at positions facing the upper to lower parts of the boat 217), and are located near the wafers 200 in the processing chamber 201 from the gas supply holes 410a and 420a.
- the supplied gas flows in the horizontal direction, that is, in the direction parallel to the surface of the wafer 200, and then flows into the exhaust passage 206 through the exhaust hole 204a. That is, the gas remaining in the processing chamber 201 is exhausted in parallel with the main surface of the wafer 200 through the exhaust hole 204a.
- the exhaust hole 204a is not limited to the case where it is configured as a slit-shaped through hole, and may be configured by a plurality of holes.
- the manifold 209 is provided with an exhaust pipe 231 for exhausting the atmosphere in the processing chamber 201.
- a pressure sensor 245 as a pressure detector (pressure detection unit) for detecting the pressure in the processing chamber 201
- an APC (Auto Pressure Controller) valve 243 and a vacuum pump as a vacuum exhaust device. 246 is connected.
- the APC valve 243 can perform vacuum exhaust and vacuum exhaust stop in the processing chamber 201 by opening and closing the valve with the vacuum pump 246 operating, and further, the valve with the vacuum pump 246 operating. By adjusting the opening degree, the pressure in the processing chamber 201 can be adjusted.
- the exhaust system that is, the exhaust line is mainly composed of the exhaust hole 204a, the exhaust passage 206, the exhaust pipe 2311, the APC valve 243, and the pressure sensor 245.
- the vacuum pump 246 may be included in the exhaust system.
- a seal cap 219 is provided as a furnace palate body that can airtightly close the lower end opening of the manifold 209.
- the seal cap 219 is configured to come into contact with the lower end of the manifold 209 from the lower side in the vertical direction.
- the seal cap 219 is made of a metal such as SUS and is formed in a disk shape.
- An O-ring 220b as a sealing member that comes into contact with the lower end of the manifold 209 is provided on the upper surface of the seal cap 219.
- a rotation mechanism 267 for rotating the boat 217 accommodating the wafer 200 is installed on the opposite side of the processing chamber 201 in the seal cap 219.
- the rotating shaft 255 of the rotating mechanism 267 penetrates the seal cap 219 and is connected to the boat 217.
- the rotation mechanism 267 is configured to rotate the wafer 200 by rotating the boat 217.
- the seal cap 219 is configured to be raised and lowered in the vertical direction by a boat elevator 115 as a raising and lowering mechanism vertically installed outside the outer tube 203.
- the boat elevator 115 is configured so that the boat 217 can be carried in and out of the processing chamber 201 by raising and lowering the seal cap 219.
- the boat elevator 115 is configured as a transport device (transport mechanism) for transporting the boat 217 and the wafer 200 housed in the boat 217 into and out of the processing chamber 201.
- the boat 217 as a substrate support supports a plurality of wafers, for example, 25 to 200 wafers, in a horizontal position and in a vertically aligned state so as to support them in multiple stages. It is configured to be arranged at intervals.
- the boat 217 is made of a heat resistant material such as quartz or SiC.
- a heat insulating plate 218 made of a heat-resistant material such as quartz or SiC is supported in a horizontal posture in multiple stages (not shown). With this configuration, the heat from the heater 207 is less likely to be transferred to the seal cap 219 side.
- this embodiment is not limited to the above-described embodiment.
- a heat insulating cylinder configured as a tubular member made of a heat-resistant material such as quartz or SiC may be provided.
- a temperature sensor 263 as a temperature detector is installed in the inner tube 204, and the amount of electricity supplied to the heater 207 is adjusted based on the temperature information detected by the temperature sensor 263.
- the temperature in the processing chamber 201 is configured to have a desired temperature distribution.
- the temperature sensor 263 is L-shaped like the nozzles 410 and 420, and is provided along the inner wall of the inner tube 204.
- the controller 121 which is a control unit (control means), is configured as a computer including a CPU (Central Processing Unit) 121a, a RAM (Random Access Memory) 121b, a storage device 121c, and an I / O port 121d.
- the RAM 121b, the storage device 121c, and the I / O port 121d are configured so that data can be exchanged with the CPU 121a via the internal bus.
- An input / output device 122 configured as, for example, a touch panel is connected to the controller 121.
- the storage device 121c is composed of, for example, a flash memory, an HDD (Hard Disk Drive), an SSD (Solid State Drive), or the like.
- a control program for controlling the operation of the substrate processing device, a process recipe in which procedures and conditions of a method for manufacturing a semiconductor device to be described later are described, and the like are readablely stored.
- the process recipes are combined so that the controller 121 can execute each step (each step) in the method for manufacturing a semiconductor device described later and obtain a predetermined result, and functions as a program.
- the process recipe, control program, etc. are collectively referred to as a program.
- the RAM 121b is configured as a memory area (work area) in which programs, data, and the like read by the CPU 121a are temporarily held.
- the I / O port 121d includes the above-mentioned MFC 312,322,512,522, valve 314,324,514,524, pressure sensor 245, APC valve 243, vacuum pump 246, heater 207, temperature sensor 263, rotation mechanism 267, and boat. It is connected to an elevator 115 or the like.
- the CPU 121a is configured to read and execute a control program from the storage device 121c and read a process recipe or the like from the storage device 121c in response to an input of an operation command from the input / output device 122 or the like.
- the CPU 121a adjusts the flow rate of various gases by the MFC 312, 322, 512, 522, opens and closes the valves 314, 324, 514, 524, opens and closes the APC valve 243, and opens and closes the APC valve so as to follow the contents of the read process recipe.
- Pressure adjustment operation based on pressure sensor 245 by 243, temperature adjustment operation of heater 207 based on temperature sensor 263, start and stop of vacuum pump 246, rotation and rotation speed adjustment operation of boat 217 by rotation mechanism 267, boat by boat elevator 115 It is configured to control the ascending / descending operation of the 217, the accommodating operation of the wafer 200 in the boat 217, and the like.
- the controller 121 is stored in an external storage device (for example, magnetic tape, magnetic disk such as flexible disk or hard disk, optical disk such as CD or DVD, magneto-optical disk such as MO, semiconductor memory such as USB memory or memory card) 123.
- the above-mentioned program can be configured by installing it on a computer.
- the storage device 121c and the external storage device 123 are configured as a computer-readable recording medium. Hereinafter, these are collectively referred to simply as a recording medium.
- the recording medium may include only the storage device 121c alone, may include only the external storage device 123 alone, or may include both of them.
- the program may be provided to the computer by using a communication means such as the Internet or a dedicated line without using the external storage device 123.
- AlO film aluminum oxide film
- wafer When the word “wafer” is used in the present specification, it may mean the wafer itself or a laminate of a wafer and a predetermined layer or film formed on the surface thereof.
- wafer surface When the term “wafer surface” is used in the present specification, it may mean the surface of the wafer itself or the surface of a predetermined layer or the like formed on the wafer.
- a predetermined layer when it is described that "a predetermined layer is formed on a wafer”, it means that a predetermined layer is directly formed on the surface of the wafer itself, or a layer formed on the wafer or the like. It may mean forming a predetermined layer on top of it.
- board in the present specification is also synonymous with the use of the term "wafer”.
- the inside of the processing chamber 201 that is, the space where the wafer 200 exists is vacuum exhausted by the vacuum pump 246 so as to have a desired pressure (vacancy).
- the pressure in the processing chamber 201 is measured by the pressure sensor 245, and the APC valve 243 is feedback-controlled based on the measured pressure information (pressure adjustment).
- the vacuum pump 246 is always kept in operation until at least the processing on the wafer 200 is completed.
- the inside of the processing chamber 201 is heated by the heater 207 so as to have a desired temperature.
- the amount of electricity supplied to the heater 207 is feedback-controlled based on the temperature information detected by the temperature sensor 263 so that the inside of the processing chamber 201 has a desired temperature distribution (temperature adjustment).
- the heating in the processing chamber 201 by the heater 207 is continuously performed at least until the processing on the wafer 200 is completed.
- the rotation mechanism 267 starts the rotation of the boat 217 and the wafer 200.
- the rotation of the boat 217 and the wafer 200 by the rotation mechanism 267 is continuously performed at least until the processing on the wafer 200 is completed.
- the raw material gas supply step step of supplying the raw material gas
- the residual gas removal step step of removing the residual gas
- the reaction gas supply step step of supplying the reaction gas
- the residual gas removal step residual gas
- residual gas removal step residual gas
- TMA gas supply step (step S10)
- the valve 314 is opened and TMA gas, which is a raw material gas, flows into the gas supply pipe 310.
- the flow rate of the TMA gas is adjusted by the MFC 312, the gas is supplied into the processing chamber 201 through the gas supply hole 410a of the nozzle 410, and is exhausted from the exhaust pipe 231.
- TMA gas is supplied to the wafer 200.
- the valve 514 may be opened at the same time, and an inert gas such as N 2 gas may flow into the gas supply pipe 510.
- the flow rate of the N 2 gas flowing through the gas supply pipe 510 is adjusted by the MFC 512, is supplied into the processing chamber 201 together with the TMA gas, and is exhausted from the exhaust pipe 231.
- the valve 524 may be opened and the N 2 gas may flow into the gas supply pipe 520.
- the N 2 gas is supplied into the processing chamber 201 via the gas supply pipe 320 and the nozzle 420, and is exhausted from the exhaust pipe 231.
- the APC valve 243 is appropriately adjusted so that the pressure in the processing chamber 201 is, for example, 1 to 1000 Pa, preferably 1 to 100 Pa, and more preferably 10 to 50 Pa.
- the pressure in the processing chamber 201 is, for example, 1 to 1000 Pa, preferably 1 to 100 Pa, and more preferably 10 to 50 Pa.
- the pressure in the processing chamber 201 is 1 to 1000 Pa or less, the residual gas described later can be suitably removed, and the TMA gas is autolyzed in the nozzle 410 and accumulated on the inner wall of the nozzle 410. It can be suppressed.
- the pressure in the processing chamber 201 to 1 Pa or more, the reaction rate of the TMA gas on the surface of the wafer 200 can be increased, and a practical film forming rate can be obtained.
- the supply flow rate of the TMA gas controlled by the MFC 312 is, for example, a flow rate within the range of 10 to 2000 sccm, preferably 50 to 1000 sccm, and more preferably 100 to 500 sccm.
- a flow rate within the range of 10 to 2000 sccm, preferably 50 to 1000 sccm, and more preferably 100 to 500 sccm.
- the supply flow rate of the N 2 gas controlled by the MFC 512 is, for example, a flow rate within the range of 1 to 30 slm, preferably 1 to 20 slm, and more preferably 1 to 10 slm.
- the time for supplying the TMA gas to the wafer 200 is, for example, in the range of 1 to 60 seconds, preferably 1 to 20 seconds, and more preferably 2 to 15 seconds.
- the heater 207 heats the wafer 200 so that the temperature of the wafer 200 is, for example, in the range of 200 to 600 ° C, preferably 400 to 550 ° C, and more preferably 450 to 550 ° C.
- the temperature By setting the temperature to 600 ° C. or lower, it is possible to obtain an appropriate film formation rate while suppressing excessive thermal decomposition of the TMA gas, and it is possible to prevent impurities from being taken into the film and increasing the resistivity. .. Since the thermal decomposition of TMA gas starts at about 450 ° C. under conditions close to the treatment, it is more effective to use the present disclosure in the treatment chamber 201 heated to a temperature of 550 ° C. or lower. On the other hand, when the temperature is 400 ° C. or higher, the reactivity is high and efficient film formation is possible.
- an Al-containing layer is formed on the outermost surface of the wafer 200.
- the Al-containing layer may contain C and H in addition to the Al layer.
- the Al-containing layer is formed by physically adsorbing TMA on the outermost surface of the wafer 200, chemically adsorbing a substance obtained by partially decomposing TMA, or depositing Al by thermally decomposing TMA. Will be done. That is, the Al-containing layer may be an adsorption layer (physisorption layer or chemisorption layer) of TMA or a substance in which a part of TMA is decomposed, or may be an Al deposition layer (Al layer).
- step S11 residual gas removal step (step S11))
- the valve 314 is closed and the supply of TMA gas is stopped.
- the APC valve 243 is left open, the inside of the processing chamber 201 is evacuated by the vacuum pump 246, and the unreacted TMA gas remaining in the processing chamber 201 or after contributing to the formation of the Al-containing layer is discharged into the processing chamber 201. Exclude from within. Valve 514 and 524 to maintain the supply of the N 2 gas into the process chamber 201 in a state where the open.
- the N 2 gas acts as a purge gas, and can enhance the effect of removing the unreacted TMA gas remaining in the treatment chamber 201 or after contributing to the formation of the Al-containing layer from the treatment chamber 201.
- the N 2 gas from the valves 514 and 524 may be continuously flowed during the residual gas removal step, or may be supplied intermittently (pulse-like).
- the flow rate of the inert gas supplied into the processing chamber 201 does not need to be large, and for example, supplying an amount equivalent to the volume of the reaction tube 203 (processing chamber 201) adversely affects the subsequent steps. It is possible to perform purging to the extent that it hardly occurs. By not completely purging the inside of the processing chamber 201 in this way, the purging time can be shortened and the throughput can be improved. In addition, the consumption of the inert gas can be minimized.
- reaction gas supply step the reaction gas supply sub-step (step S12) and the residual gas removal sub-step (step S13) are repeated.
- reaction gas supply sub-step (step S12) After removal of the residual gas in the processing chamber 201, opening the valve 324, flow the O 3 gas is a reaction gas into the gas supply pipe 320.
- O 3 gas is the flow rate adjusted by MFC322 is supplied to the wafer 200 in the process chamber 201 through the gas supply holes 420a of the nozzle 420, is exhausted from the exhaust pipe 231. That wafer 200 is exposed to the O 3 gas.
- opening the valve 524 it may be flowed N 2 gas into the gas supply pipe 520.
- the flow rate of the N 2 gas is adjusted by the MFC 522, is supplied into the processing chamber 201 together with the O 3 gas, and is exhausted from the exhaust pipe 231.
- opening the valve 514 it may be flowed N 2 gas to the gas supply pipe 510.
- the N 2 gas is supplied into the processing chamber 201 via the gas supply pipe 510 and the nozzle 410, and is exhausted from the exhaust pipe 231.
- the time for supplying the O 3 gas to the wafer 200 (O 3 gas supply time) is, for example, preferably 0.01 to 5 seconds, more preferably 0.01 to 3 seconds. If the O 3 gas supply time is less than 0.01 seconds, the O 3 gas wraps around the edge of the wafer 200, and the supply amount of the O 3 gas to the center of the wafer 200 becomes insufficient. Further, if the O 3 gas supply time exceeds 5 seconds, the O 3 gas supply time becomes long, and it takes time to reduce the pressure in the processing chamber 201 to a predetermined pressure, resulting in a decrease in throughput.
- the time for supplying the O 3 gas to the wafer 200 By setting the time for supplying the O 3 gas to the wafer 200 to 0.01 seconds or more and 5 seconds or less, the O 3 gas can be suppressed from wrapping around the edge of the wafer 200, and the pressure in the processing chamber 201 can be increased. Since the residual gas removal substep of the next step can be performed before the stabilization, the time until the pressure in the processing chamber 201 is lowered can be shortened, and the throughput can be improved.
- Other treatment conditions are the same as those in the raw material gas supply step described above.
- AlO layer aluminum oxide layer containing Al and O as a metal oxide layer. That is, the Al-containing layer is modified into an AlO layer.
- step S13 Before it is determined that the reaction gas supply substep conducted a predetermined number of times (m times) in turn closes the valve 324 to stop the supply of the O 3 gas.
- APC step while valve 243 is opened, and vacuum evacuating the processing chamber 201 by the vacuum pump 246, the processing chamber processing chamber O 3 gas after contributing to unreacted or Al-containing layer formed remaining in the 201 It is removed from the inside of 201, and the inside of the processing chamber 201 is depressurized. At this time, the point that the gas or the like remaining in the processing chamber 201 does not have to be completely removed is the same as in the residual gas removing step after the raw material gas supply step.
- the time for vacuum exhausting the inside of the processing chamber 201 by the vacuum pump 246 is, for example, preferably 0.05 to 9 seconds, more preferably 0.5 to 5 seconds. If the vacuum exhaust time is less than 0.05, the pressure in the processing chamber 201 cannot be sufficiently reduced to a predetermined pressure, and if it exceeds 9 seconds, the vacuum exhaust time becomes too long and the throughput Will decrease.
- the vacuum exhaust time is set to 0.05 to 9 seconds, more preferably 0.5 to 5 seconds, the pressure in the processing chamber 201 can be sufficiently lowered in a short time, and the vacuum exhaust time is long. It is possible to suppress a decrease in throughput without becoming too much.
- a time for supplying the above-mentioned O 3 gas to the wafer 200 (supply time), the time to evacuate the inside of the process chamber 201 by the vacuum pump 246 (exhaust time) ratio of the (supply time: evacuation time), 1 : It is preferably in the range of 2 to 1: 5.
- Supply time When the exhaust time is 1: 5 or less, the exhaust time does not become too long, and a decrease in throughput can be suppressed.
- reaction gas supply step reaction gas supply step
- residual gas removal substep reaction gas exhaust step
- the treatment is performed in a state where the pressure in the processing chamber 201 is not stabilized and rises. supplying the O 3 gas into the chamber 201, the pressure in the processing chamber 201 to stop the supply of the O 3 gas into the processing chamber 201 prior to a certain reduction.
- the two-dot chain line in FIG. 5 shows the pressure when the pressure in the processing chamber 201 to supply the O 3 gas in the even processing chamber 201 after the stabilized ..
- the pressure in the processing chamber 201 to supply the O 3 gas in a state where no stabilized the pressure in the processing chamber 201 into the process chamber 201 before a predetermined reduction stopping the supply of the O 3 gas.
- a predetermined reduction stopping the supply of the O 3 gas.
- the reaction gas supply sub-step and the residual gas removal sub-step described above are repeated.
- the pressure in the processing chamber 201 to supply the O 3 gas is also into the processing chamber 201 after a certain reduction, O 3 into the processing chamber 201 after a predetermined time has elapsed Stop the gas supply.
- the central portion of the contained wafer 200 surface in the processing chamber 201 many O 3 gas reaches.
- the difference in film thickness between the edge portion and the center portion of the surface of the wafer 200 can be made smaller, so that the in-plane film thickness uniformity of the AlO film formed on the wafer 200 can be improved.
- Step S14 residual gas removal step (step S14)) After the AlO layer is formed, by closing the valve 324 to stop the supply of the O 3 gas. Then, by the same procedure as residual gas removal step after the raw material gas supply step, O 3 gas after contributing to the formation of unreacted or AlO layer remaining in the process chamber 201 and reaction byproducts processing chamber 201 Exclude from within. At this time, the point that the gas or the like remaining in the processing chamber 201 does not have to be completely removed is the same as in the residual gas removing step after the raw material gas supply step.
- An AlO film is formed on the wafer 200 by performing the cycle of sequentially performing the above-mentioned raw material gas supply step, residual gas removal step, reaction gas supply step, and residual gas supply step one or more times (predetermined number of times: n times). ..
- the number of this cycle is appropriately selected according to the film thickness required for the AlO film to be finally formed, but this cycle is preferably repeated a plurality of times.
- the thickness (film thickness) of the AlO film is, for example, 3 to 150 nm, preferably 40 to 100 nm, and more preferably 60 to 80 nm. When it is 150 nm or less, the surface roughness can be reduced, and when it is 3 nm or more, the occurrence of film peeling due to the stress difference with the underlying film can be suppressed.
- N 2 gas is supplied into the processing chamber 201 from each of the gas supply pipes 310 and 320, and the gas is exhausted from the exhaust pipe 231.
- the N 2 gas acts as a purge gas, and the gas and by-products remaining in the treatment chamber 201 are removed from the treatment chamber 201 (after-purge).
- the atmosphere in the process chamber 201 is replaced with N 2 gas (N 2 gas replacement), the pressure in the processing chamber 201 is returned to normal pressure (atmospheric pressure return).
- the reaction gas exhaust sub-step for exhausting the gas is repeated a predetermined number of times.
- the average flow velocity of the reaction gas per cycle can be increased as compared with the conventional method for manufacturing a semiconductor device, so that more reaction gas reaches the central portion of the substrate surface in the processing chamber.
- the difference in film thickness between the edge portion and the center portion of the substrate surface can be made smaller, so that the in-plane film thickness uniformity of the film formed on the substrate can be improved.
- TMA gas is used as the Al-containing gas
- AlCl 3 aluminum chloride
- oxygen (O 2 ) oxygen
- H 2 O water
- H 2 plasma hydrogen peroxide and hydrogen (H 2 ) plasma
- the example in which the N 2 gas is used has been described as the inert gas, but the present invention is not limited to this, and a rare gas such as Ar gas, He gas, Ne gas, or Xe gas may be used.
- an example of forming an AlO film on the substrate has been described.
- the present disclosure is not limited to this aspect.
- it is effective for film types having adhesion such that they self-decompose in the nozzle at the processing temperature and adhere to the inner wall of the nozzle as deposits, and the deposits are peeled off in the film formation cycle.
- It is also used for film types that form a film using a raw material gas that is simultaneously diluted with an inert gas or the like when supplying the raw material gas.
- nitride films containing at least one of the elements, oxide films, acid carbide films, acid nitride films, acid carbon nitride films, molybdenum nitride films, molybdenum nitride films, metal element single films, etc. is there.
- the recipe (program that describes the treatment procedure, treatment conditions, etc.) used for the film formation treatment is the treatment content (type, composition ratio, film quality, film thickness, treatment procedure, treatment conditions, etc. of the film to be formed or removed). It is preferable to prepare them individually and store them in the storage device 121c via a telecommunication line or an external storage device 123. Then, when starting the process, it is preferable that the CPU 121a appropriately selects an appropriate recipe from the plurality of recipes stored in the storage device 121c according to the processing content. As a result, it becomes possible to form films of various film types, composition ratios, film qualities, and film thicknesses with good reproducibility with one substrate processing apparatus, and appropriate processing can be performed in each case. Will be. In addition, the burden on the operator (input burden on processing procedures, processing conditions, etc.) can be reduced, and processing can be started quickly while avoiding operation mistakes.
- the above recipe is not limited to the case of newly creating, for example, it may be prepared by changing an existing recipe already installed in the board processing apparatus.
- the changed recipe may be installed on the substrate processing apparatus via a telecommunication line or a recording medium on which the recipe is recorded.
- the input / output device 122 included in the existing board processing device may be operated to directly change the existing recipe already installed in the board processing device.
- processing procedure and processing conditions at this time can be the same as the processing procedures and processing conditions of the above-described embodiments and modifications.
- Substrate processing device 121 Controller 200: Wafer (board) 201: Processing chamber 410: Nozzle (first nozzle) 420: Nozzle (second nozzle)
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Abstract
Description
基板処理装置10は、加熱手段(加熱機構、加熱系)としてのヒータ207が設けられた処理炉202を備える。ヒータ207は円筒形状であり、保持板としてのヒータベース(図示せず)に支持されることにより垂直に据え付けられている。
半導体装置(デバイス)の製造工程の一工程として、ウエハ上200に膜を形成する工程の一例について、図4を用いて説明する。以下の説明において、基板処理装置10を構成する各部の動作はコントローラ121により制御される。
複数枚のウエハ200がボート217に装填(ウエハチャージ)されると、図1に示すように、複数枚のウエハ200が収容されたボート217は、ボートエレベータ115によって持ち上げられて処理室201内に搬入(ボートロード)される。この状態で、シールキャップ219は、Oリング220bを介してマニホールド209の下端をシールした状態となる。
処理室201内、すなわち、ウエハ200が存在する空間が所望の圧力(真空度)となるように真空ポンプ246によって真空排気される。この際、処理室201内の圧力は、圧力センサ245で測定され、この測定された圧力情報に基づき、APCバルブ243がフィードバック制御される(圧力調整)。真空ポンプ246は、少なくともウエハ200に対する処理が完了するまでの間は常時作動させた状態を維持する。また、処理室201内が所望の温度となるようにヒータ207によって加熱される。この際、処理室201内が所望の温度分布となるように、温度センサ263が検出した温度情報に基づきヒータ207への通電量がフィードバック制御される(温度調整)。ヒータ207による処理室201内の加熱は、少なくともウエハ200に対する処理が完了するまでの間は継続して行われる。続いて、回転機構267によりボート217およびウエハ200の回転を開始する。回転機構267によるボート217およびウエハ200の回転は、少なくとも、ウエハ200に対する処理が完了するまでの間は継続して行われる。
続いて、原料ガス供給ステップ(原料ガスを供給する工程)、残留ガス除去ステップ(残留ガスを除去する工程)、反応ガス供給ステップ(反応ガスを供給する工程)、残留ガス除去ステップ(残量ガスを除去する工程)をこの順で非同時に所定回数(n回)行うことで、AlO膜を形成するステップ(AlO膜を形成する工程)が行われる。反応ガス供給ステップでは、反応ガス供給サブステップ(反応ガス供給サブ工程)および残留ガス除去サブステップ(反応ガス排気サブ工程)をこの順で繰り返し所定回数(m回)行う。
AlO膜形成工程の1サイクルを図5に示す。
バルブ314を開き、ガス供給管310内に原料ガスであるTMAガスを流す。TMAガスは、MFC312により流量調整され、ノズル410のガス供給孔410aから処理室201内に供給され、排気管231から排気される。このとき、ウエハ200に対してTMAガスが供給されることとなる。このとき同時にバルブ514を開き、ガス供給管510内にN2ガス等の不活性ガスを流してもよい。ガス供給管510内を流れたN2ガスは、MFC512により流量調整され、TMAガスと一緒に処理室201内に供給され、排気管231から排気される。なお、このとき、ノズル420内へのTMAガスの侵入を防止するために、バルブ524を開き、ガス供給管520内にN2ガスを流してもよい。N2ガスは、ガス供給管320、ノズル420を介して処理室201内に供給され、排気管231から排気される。
Al含有層が形成された後、バルブ314を閉じ、TMAガスの供給を停止する。このとき、APCバルブ243は開いたままとして、真空ポンプ246により処理室201内を真空排気し、処理室201内に残留する未反応またはAl含有層形成に寄与した後のTMAガスを処理室201内から排除する。バルブ514,524は開いた状態でN2ガスの処理室201内への供給を維持する。N2ガスはパージガスとして作用し、処理室201内に残留する未反応またはAl含有層形成に寄与した後のTMAガスを処理室201内から排除する効果を高めることができる。なお、バルブ514,524からのN2ガスは残留ガス除去ステップの間、常に流し続けてもよいし、断続的(パルス的)に供給してもよい。
処理室201内の残留ガスを除去した後、バルブ324を開き、ガス供給管320内に反応ガスであるO3ガスを流す。O3ガスは、MFC322により流量調整され、ノズル420のガス供給孔420aから処理室201内のウエハ200に対して供給され、排気管231から排気される。すなわちウエハ200はO3ガスに暴露される。このとき、バルブ524を開き、ガス供給管520内にN2ガスを流してもよい。N2ガスは、MFC522により流量調整され、O3ガスと共に処理室201内に供給されて、排気管231から排気される。このとき、ノズル410内へのO3ガスの侵入を防止(逆流を防止)するために、バルブ514を開き、ガス供給管510内へN2ガスを流してもよい。N2ガスは、ガス供給管510、ノズル410を介して処理室201内に供給され、排気管231から排気される。
反応ガス供給サブステップを所定回数(m回)行ったと判断される前は、次にバルブ324を閉じて、O3ガスの供給を停止する。このとき、APCバルブ243は開いたままとして、真空ポンプ246により処理室201内を真空排気し、処理室201内に残留する未反応またはAl含有層形成に寄与した後のO3ガスを処理室201内から排除し、処理室201内を減圧する。このとき、処理室201内に残留するガス等を完全に排除しなくてもよい点は、原料ガス供給ステップ後の残留ガス除去ステップと同様である。
AlO層が形成された後、バルブ324を閉じて、O3ガスの供給を停止する。そして、原料ガス供給ステップ後の残留ガス除去ステップと同様の処理手順により、処理室201内に残留する未反応もしくはAlO層の形成に寄与した後のO3ガスや反応副生成物を処理室201内から排除する。このとき、処理室201内に残留するガス等を完全に排除しなくてもよい点は、原料ガス供給ステップ後の残留ガス除去ステップと同様である。
上述の原料ガス供給ステップ、残留ガス除去ステップ、反応ガス供給ステップおよび残留ガス供給ステップを順に行うサイクルを1回以上(所定回数:n回)行うことにより、ウエハ200上にAlO膜が形成される。このサイクルの回数は、最終的に形成するAlO膜において必要とされる膜厚に応じて適宜選択されるが、このサイクルは、複数回繰り返すことが好ましい。AlO膜の厚さ(膜厚)は、例えば、3~150nm、好ましくは40~100nm、より好ましくは60~80nmとする。150nm以下とすることで表面粗さを小さくすることができ、3nm以上とすることで下地膜との応力差に起因する膜剥がれの発生を抑制することができる。
成膜ステップが終了したら、バルブ514,524を開き、ガス供給管310,320のそれぞれからN2ガスを処理室201内へ供給し、排気管231から排気する。N2ガスはパージガスとして作用し、処理室201内に残留するガスや副生成物が処理室201内から除去される(アフターパージ)。その後、処理室201内の雰囲気がN2ガスに置換され(N2ガス置換)、処理室201内の圧力は常圧に復帰される(大気圧復帰)。
その後、ボートエレベータ115によりシールキャップ219が下降され、マニホールド209の下端が開口されるとともに、処理済のウエハ200が、ボート217に支持された状態でマニホールド209の下端から反応管203の外部に搬出(ボートアンロード)される。処理済のウエハ200は、反応管203の外部に搬出された後、ボート217より取り出される(ウエハディスチャージ)。
121:コントローラ
200:ウエハ(基板)
201:処理室
410:ノズル(第1のノズル)
420:ノズル(第2のノズル)
Claims (12)
- 処理室内の基板に対して原料ガスを供給する工程と、
前記処理室内の前記基板に対して前記原料ガスとは分子構造が異なる反応ガスを供給する工程と、
を非同時に所定回数行うことで、前記基板上に膜を形成する工程を有し、
前記反応ガスを供給する工程では、前記処理室内の圧力が安定していない状態で、前記処理室内の前記基板に対しての前記反応ガスの供給と、前記処理室内からの前記反応ガスの排気と、を所定回数繰り返して行う半導体装置の製造方法。 - 前記反応ガスの供給では、前記処理室内に前記反応ガスを0.01秒以上5秒以下の範囲内で供給する請求項1に記載の半導体装置の製造方法。
- 前記反応ガスの排気では、前記処理室内を0.05秒以上9秒以下の範囲内で排気する請求項1に記載の半導体装置の製造方法。
- 前記原料ガスがアルミニウムを含む金属含有ガスであり、前記反応ガスが酸素含有ガスである請求項1に記載の半導体装置の製造方法。
- 基板を処理する処理室と、
前記処理室内の前記基板に対して原料ガスを供給する原料ガス供給系と、
前記処理室内の前記基板に対して前記原料ガスとは分子構造が異なる反応ガスを供給する反応ガス供給系と、
前記処理室内を排気する排気系と、
前記処理室内の前記基板に対して前記原料ガスを供給する処理と、前記処理室内の前記基板に対して前記反応ガスを供給する処理と、を非同時に所定回数行うことで、前記基板上に膜を形成する処理を行わせ、前記反応ガスを供給する処理において、前記処理室内の圧力が安定していない状態で、前記処理室内の前記基板に対しての前記反応ガスの供給と、前記処理室内からの前記反応ガスの排気と、を所定回数繰り返し行わせるように、前記原料ガス供給系、前記反応ガス供給系、および前記排気系を制御することが可能なよう構成される制御部と、
を有する基板処理装置。 - 前記制御部が、
前記反応ガスの供給では、前記処理室内に前記反応ガスを0.01秒以上5秒以下の範囲で供給するように前記反応ガス供給系に制御信号を出力することが可能な請求項5に記載の基板処理装置。 - 前記制御部が、
前記反応ガスの排気では、前記処理室内を0.05秒以上9秒以下の範囲内で排気するように前記排気系に制御信号を出力することが可能な請求項5に記載の基板処理装置。 - 前記原料ガスがアルミニウムを含む金属含有ガスであり、前記反応ガスが酸素含有ガスである請求項5に記載の基板処理装置。
- 基板処理装置の処理室内の基板に対して原料ガスを供給する手順と、
前記処理室内の前記基板に対して前記原料ガスとは分子構造が異なる反応ガスを供給する手順と、
を非同時に所定回数行うことで、前記基板上に膜を形成する手順と、
前記反応ガスを供給する手順において、前記処理室内の圧力が安定していない状態で、前記処理室内の基板に対しての前記反応ガスの供給と、前記処理室内からの前記反応ガスの排気と、を所定回数繰り返して行う手順と、
をコンピュータによって前記基板処理装置に実行させるプログラム。 - 前記反応ガスの供給では、前記処理室内に前記反応ガスを0.01秒以上5秒以下の範囲内で供給する請求項9に記載のプログラム。
- 前記反応ガスの排気では、前記処理室内を0.05秒以上9秒以下の範囲内で排気する請求項9に記載のプログラム。
- 前記原料ガスがアルミニウムを含む金属含有ガスであり、前記反応ガスが酸素含有ガスである請求項9に記載のプログラム。
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WO2008143024A1 (ja) * | 2007-05-23 | 2008-11-27 | Canon Anelva Corporation | 薄膜成膜装置 |
JP2010084192A (ja) * | 2008-09-30 | 2010-04-15 | Tokyo Electron Ltd | 成膜装置 |
JP2014208883A (ja) * | 2013-03-28 | 2014-11-06 | 株式会社日立国際電気 | 半導体装置の製造方法、基板処理装置およびプログラム |
JP2016072260A (ja) * | 2014-09-26 | 2016-05-09 | 株式会社日立国際電気 | 基板処理装置、半導体装置の製造方法及びプログラム |
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