WO2021171466A1 - 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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- WO2021171466A1 WO2021171466A1 PCT/JP2020/007979 JP2020007979W WO2021171466A1 WO 2021171466 A1 WO2021171466 A1 WO 2021171466A1 JP 2020007979 W JP2020007979 W JP 2020007979W WO 2021171466 A1 WO2021171466 A1 WO 2021171466A1
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- hydrogen
- nitrogen
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- H—ELECTRICITY
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
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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
- H01L21/02123—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 silicon
- H01L21/02126—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 silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
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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
- H01L21/02123—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 silicon
- H01L21/02167—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 silicon the material being a silicon carbide not containing oxygen, e.g. SiC, SiC:H or silicon carbonitrides
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- H—ELECTRICITY
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- 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
- H01L21/02123—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 silicon
- H01L21/0217—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 silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
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- 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
- H01L21/02205—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 the layer being characterised by the precursor material for deposition
- H01L21/02208—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 the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02211—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 the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound being a silane, e.g. disilane, methylsilane or chlorosilane
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- 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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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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- H—ELECTRICITY
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- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
Definitions
- This disclosure relates to a semiconductor device manufacturing method, a substrate processing device, and a program.
- a process of forming a film on a substrate using a plurality of types of gases may be performed (see, for example, Patent Documents 1 and 2).
- a process of forming a film may be performed by using a plurality of types of gases so as to embed the inside of the recess provided on the surface of the substrate.
- An object of the present disclosure is to improve the characteristics of a film formed so as to be embedded in a recess provided on the surface of a substrate.
- a step of supplying the contained gas a predetermined number of times under the first temperature, at least one of the raw material gas, the first nitrogen and hydrogen-containing gas, and the second nitrogen and hydrogen-containing gas A step of forming an oligomer-containing layer on the surface of the substrate and in the recess by generating, growing, and flowing an oligomer containing an element contained in the gas on the surface of the substrate and in the recess.
- the surface of the substrate and the surface of the substrate in which the oligomer-containing layer is formed are subjected to post-treatment at a second temperature equal to or higher than the first temperature.
- the processing furnace 202 has a heater 207 as a heating mechanism (temperature adjusting unit).
- the heater 207 has a cylindrical shape and is vertically installed by being supported by a holding plate.
- the heater 207 also functions as an activation mechanism (excitation portion) for activating (exciting) the gas with heat.
- a reaction tube 203 is arranged concentrically with the heater 207.
- the reaction 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 209 is arranged concentrically with the reaction tube 203.
- the manifold 209 is made of a metal material such as stainless steel (SUS), and is formed in a cylindrical shape with open upper and lower ends. The upper end of the manifold 209 is engaged with the lower end of the reaction tube 203 and is configured to support the reaction tube 203.
- An O-ring 220a as a sealing member is provided between the manifold 209 and the reaction tube 203.
- the reaction tube 203 is installed vertically like the heater 207.
- a processing container (reaction container) is mainly composed of the reaction tube 203 and the manifold 209.
- a processing chamber 201 is formed in the hollow portion of the processing container.
- the processing chamber 201 is configured to accommodate the wafer 200 as a substrate.
- the wafer 200 is processed in the processing chamber 201.
- Nozzles 249a to 249c as first to third supply units are provided in the processing chamber 201 so as to penetrate the side wall of the manifold 209.
- the nozzles 249a to 249c are also referred to as first to third nozzles.
- the nozzles 249a to 249c are made of a non-metallic material such as quartz or SiC, which is a heat-resistant material.
- Gas supply pipes 232a to 232c are connected to the nozzles 249a to 249c, respectively.
- the nozzles 249a to 249c are different nozzles, and each of the nozzles 249a and 249c is provided adjacent to the nozzle 249b.
- the gas supply pipes 232a to 232c are provided with mass flow controllers (MFCs) 241a to 241c which are flow rate controllers (flow control units) and valves 243a to 243c which are on-off valves, respectively, in order from the upstream side of the gas flow. ..
- MFCs mass flow controllers
- a gas supply pipe 232e is connected to the downstream side of the gas supply pipe 232a with respect to the valve 243a.
- Gas supply pipes 232d and 232f are connected to the downstream side of the gas supply pipe 232b with respect to the valve 243b, respectively.
- a gas supply pipe 232g is connected to the downstream side of the gas supply pipe 232c with respect to the valve 243c.
- the gas supply pipes 232d to 232 g are provided with MFCs 241d to 241 g and valves 243d to 243 g in this order from the upstream side of the gas flow.
- the gas supply pipes 232a to 232g are made of a metal material such as SUS.
- the nozzles 249a to 249c are arranged in an annular space in a plan view between the inner wall of the reaction tube 203 and the wafer 200, along the upper part of the inner wall of the reaction tube 203 from the lower part of the wafer 200.
- Each is provided so as to stand upward in the arrangement direction. That is, the nozzles 249a to 249c are provided along the wafer arrangement region in the region horizontally surrounding the wafer arrangement region on the side of the wafer arrangement region in which the wafer 200 is arranged.
- the nozzle 249b is arranged so as to face the exhaust port 231a described later with the center of the wafer 200 carried into the processing chamber 201 in a straight line.
- the nozzles 249a and 249c are arranged so as to sandwich a straight line L passing through the nozzle 249b and the center of the exhaust port 231a along the inner wall (outer peripheral portion of the wafer 200) of the reaction tube 203 from both sides.
- the straight line L is also a straight line passing through the nozzle 249b and the center of the wafer 200. That is, it can be said that the nozzle 249c is provided on the side opposite to the nozzle 249a with the straight line L interposed therebetween.
- the nozzles 249a and 249c are arranged line-symmetrically with the straight line L as the axis of symmetry.
- Gas supply holes 250a to 250c for supplying gas are provided on the side surfaces of the nozzles 249a to 249c, respectively. Each of the gas supply holes 250a to 250c is opened so as to face (face) the exhaust port 231a in a plan view, and gas can be supplied toward the wafer 200. A plurality of gas supply holes 250a to 250c are provided from the lower part to the upper part of the reaction tube 203.
- a silane-based gas containing silicon (Si) as a main element constituting a film formed on the surface of the wafer 200 is passed through the MFC 241a, the valve 243a, and the nozzle 249a. Is supplied into the processing chamber 201.
- a gas containing Si and halogen that is, a halosilane-based gas can be used.
- Halogen includes chlorine (Cl), fluorine (F), bromine (Br), iodine (I) and the like.
- halosilane-based gas for example, a gas containing silicon, carbon (C), and halogen, that is, an organic halosilane-based gas can be used.
- organic halosilane-based gas for example, a gas containing Si, C, and Cl, that is, an organic chlorosilane-based gas can be used. Twice
- an amine-based gas as a primary nitrogen (N) and hydrogen (H) -containing gas is supplied into the processing chamber 201 via the MFC 241b, the valve 243b, and the nozzle 249b.
- the amine-based gas further contains C, and the amine-based gas can also be referred to as a C, N, and H-containing gas.
- a hydrogen nitride-based gas as the second N and H-containing gas is supplied into the processing chamber 201 via the MFC 241c, the valve 243c, and the nozzle 249c. Twice
- O and H-containing gases as oxygen (O) -containing gas are supplied into the processing chamber 201 via the MFC 241d, the valve 243d, the gas supply pipe 232b, and the nozzle 249b.
- the inert gas is supplied into the processing chamber 201 via the MFC 241e to 241 g, the valve 243e to 243 g, the gas supply pipes 232a to 232c, and the nozzles 249a to 249c, respectively.
- the inert gas acts as a purge gas, a carrier gas, a diluting gas and the like.
- the raw material gas supply system (silane-based gas supply system) is mainly composed of the gas supply pipe 232a, the MFC 241a, and the valve 243a.
- the first N and H-containing gas supply system (amine-based gas supply system) is mainly composed of the gas supply pipe 232b, the MFC 241b, and the valve 243b.
- the second N and H-containing gas supply system (hydrogen nitride gas supply system) is mainly composed of the gas supply pipe 232c, the MFC 241c, and the valve 243c.
- the O-containing gas supply system is mainly composed of the gas supply pipe 232d, the MFC 241d, and the valve 243d.
- the inert gas supply system is mainly composed of gas supply pipes 232e to 232 g, MFC 241e to 241 g, and valves 243e to 243 g.
- any or all of the supply systems may be configured as an integrated supply system 248 in which valves 243a to 243 g, MFC 241a to 241 g, and the like are integrated.
- the integrated supply system 248 is connected to each of the gas supply pipes 232a to 232g, and supplies various gases into the gas supply pipes 232a to 232g, that is, by opening and closing valves 243a to 243g and by MFC 241a to 241g.
- the flow rate adjustment operation and the like are configured to be controlled by the controller 121 described later.
- the integrated supply system 248 is configured as an integrated or divided integrated unit, and can be attached to and detached from the gas supply pipes 232a to 232 g in units of the integrated unit. It is configured so that maintenance, replacement, expansion, etc. can be performed on an integrated unit basis.
- an exhaust port 231a for exhausting the atmosphere in the processing chamber 201 is provided below the side wall of the reaction tube 203. As shown in FIG. 2, the exhaust port 231a is provided at a position facing (facing) the nozzles 249a to 249c (gas supply holes 250a to 250c) with the wafer 200 interposed therebetween in a plan view.
- the exhaust port 231a may be provided along the upper part of the side wall of the reaction tube 203, that is, along the wafer arrangement region.
- An exhaust pipe 231 is connected to the exhaust port 231a.
- the exhaust pipe 231 is provided via a pressure sensor 245 as a pressure detector (pressure detector) for detecting the pressure in the processing chamber 201 and an APC (Auto Pressure Controller) valve 244 as a pressure regulator (pressure regulator).
- a vacuum pump 246 as a vacuum exhaust device is connected.
- the APC valve 244 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, with the vacuum pump 246 operating, the APC valve 244 can perform vacuum exhaust and vacuum exhaust stop. By adjusting the valve opening degree based on the pressure information detected by the pressure sensor 245, the pressure in the processing chamber 201 can be adjusted.
- the exhaust system is mainly composed of an exhaust pipe 231, an APC valve 244, and a 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 made of a metal material 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 which will be described later, is installed below 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 vertically lifted and lowered by a boat elevator 115 as a lifting mechanism installed outside the reaction tube 203.
- the boat elevator 115 is configured as a transport device (convey mechanism) for loading and unloading (conveying) the wafer 200 into and out of the processing chamber 201 by raising and lowering the seal cap 219.
- a shutter 219s is provided as a furnace palate body capable of airtightly closing the lower end opening of the manifold 209 in a state where the seal cap 219 is lowered and the boat 217 is carried out from the processing chamber 201.
- the shutter 219s is made of a metal material such as SUS and is formed in a disk shape.
- An O-ring 220c as a sealing member that comes into contact with the lower end of the manifold 209 is provided on the upper surface of the shutter 219s.
- the opening / closing operation of the shutter 219s (elevating / lowering operation, rotating operation, etc.) is controlled by the shutter opening / closing mechanism 115s.
- the boat 217 as a substrate support supports a plurality of wafers, for example 25 to 200 wafers, in a horizontal position and vertically aligned with each other, that is, in a multi-stage manner. 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 multiple stages.
- a temperature sensor 263 as a temperature detector is installed in the reaction tube 203. By adjusting the degree of energization of the heater 207 based on the temperature information detected by the temperature sensor 263, the temperature in the processing chamber 201 becomes a desired temperature distribution.
- the temperature sensor 263 is provided along the inner wall of the reaction tube 203.
- 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 121e.
- 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 the procedures and conditions for substrate processing described later are described, and the like are readablely stored.
- the process recipes are combined so that the controller 121 can execute each procedure in the substrate processing described later and obtain a predetermined result, and functions as a program.
- process recipes, control programs, etc. are collectively referred to simply as programs.
- a process recipe is also simply referred to as a recipe.
- 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 MFCs 241a to 241g, valves 243a to 243g, pressure sensor 245, APC valve 244, vacuum pump 246, temperature sensor 263, heater 207, rotation mechanism 267, boat elevator 115, shutter opening / closing mechanism 115s, etc. It is connected to the.
- the CPU 121a is configured to read and execute a control program from the storage device 121c and read a recipe 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 MFCs 241a to 241g, opens and closes the valves 243a to 243g, opens and closes the APC valve 244, and adjusts the pressure by the APC valve 244 based on the pressure sensor 245 so as to follow the contents of the read recipe.
- the controller 121 can be configured by installing the above-mentioned program stored in the external storage device 123 on the computer.
- the external storage device 123 includes, for example, a magnetic disk such as an HDD, an optical disk such as a CD, a magneto-optical disk such as MO, a USB memory, a semiconductor memory such as an SSD, and the like.
- 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.
- recording medium may include only the storage device 121c alone, it may include only the external storage device 123 alone, or it 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.
- a cycle including a step of supplying the second N and H-containing gas to the wafer 200 (second N and H-containing gas supply) is performed a predetermined number of times under the first temperature (n times, n is an integer of 1 or more).
- an oligomer containing an element contained in at least one of the raw material gas, the first N and H-containing gas, and the second N and H-containing gas is generated and grown on the surface and the recess of the wafer 200.
- the step of forming an oligomer-containing layer on the surface of the wafer 200 and in the recess (oligomer-containing layer formation).
- the surface of the wafer 200 is formed by performing post-treatment (hereinafter, also referred to as PT) on the wafer 200 in which the oligomer-containing layer is formed on the surface of the wafer 200 and in the recesses at a second temperature equal to or higher than the first temperature.
- 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.
- the use of the term “wafer” in the present specification is also synonymous with the use of the term “wafer”.
- the shutter 219s is moved by the shutter opening / closing mechanism 115s to open the lower end opening of the manifold 209 (shutter open).
- the boat 217 supporting the plurality of wafers 200 is lifted by the boat elevator 115 and carried into the processing chamber 201 (boat load).
- the seal cap 219 is in a state of sealing the lower end of the manifold 209 via the O-ring 220b.
- the inside of the processing chamber 201 that is, the space where the wafer 200 exists is evacuated (vacuum exhaust) by the vacuum pump 246 so as to have a desired pressure (vacuum degree).
- the pressure in the processing chamber 201 is measured by the pressure sensor 245, and the APC valve 244 is feedback-controlled based on the measured pressure information (pressure adjustment).
- the wafer 200 in the processing chamber 201 is heated by the heater 207 so as to have a desired processing temperature.
- the state of energization of 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 rotation mechanism 267 starts the rotation of the wafer 200. Exhaust in the processing chamber 201, heating and rotation of the wafer 200 are all continuously performed at least until the processing of the wafer 200 is completed.
- Step 1 the raw material gas is supplied to the wafer 200 in the processing chamber 201.
- valve 243a is opened to allow the raw material gas to flow into the gas supply pipe 232a.
- the flow rate of the raw material gas is adjusted by the MFC 241a, is supplied into the processing chamber 201 via the nozzle 249a, and is exhausted from the exhaust port 231a.
- the raw material gas is supplied to the wafer 200 (raw material gas supply).
- the valves 243e to 243g may be opened to supply the inert gas into the processing chamber 201 via the nozzles 249a to 249c.
- the valve 243a is closed and the supply of the raw material gas into the processing chamber 201 is stopped. Then, the inside of the processing chamber 201 is evacuated, and the gas or the like remaining in the processing chamber 201 is removed from the inside of the processing chamber 201. At this time, the valves 243e to 243g are opened, and the inert gas is supplied into the processing chamber 201 via the nozzles 249a to 249c.
- the inert gas supplied from the nozzles 249a to 249c acts as a purge gas, whereby the space where the wafer 200 exists, that is, the inside of the processing chamber 201 is purged (purge).
- Examples of the raw material gas include C and halogen-free silane-based gases such as monosilane (SiH 4 , abbreviation: MS) gas and disilane (Si 2 H 6 , abbreviation: DS) gas, and dichlorosilane (SiH 2 Cl 2 , abbreviation).
- halogen-free silane-based gases such as monosilane (SiH 4 , abbreviation: MS) gas and disilane (Si 2 H 6 , abbreviation: DS) gas, and dichlorosilane (SiH 2 Cl 2 , abbreviation).
- DCS DCS
- HCDS hexachlorodisilane
- HCDS hexachlorodisilane
- other C-free halosilane gas trimethylsilane (SiH (CH 3 ) 3 , abbreviation: TMS) gas, dimethylsilane (SiH 2) (CH 3 ) 2 , abbreviation: DMS) gas, triethylsilane (SiH (C 2 H 5 ) 3 , abbreviation: TES) gas, diethylsilane (SiH 2 (C 2 H 5 ) 2 , abbreviation: DES) gas, etc.
- Alkylsilane gas bis (trichlorosilyl) methane ((SiCl 3 ) 2 CH 2 , abbreviation: BTCSM) gas, 1,2-bis (trichlorosilyl) ethane ((SiCl 3 ) 2 C 2 H 4 , abbreviation: Alkylene halosilane gas such as BTCSE) gas, trimethylchlorosilane (SiCl (CH 3 ) 3 , abbreviation: TMCS) gas, dimethyldichlorosilane (SiCl 2 (CH 3 ) 2 , abbreviation: DMDCS) gas, triethylchlorosilane (SiCl) (C 2 H 5 ) 3 , abbreviation: TECS) gas, diethyldichlorosilane (SiCl 2 (C 2 H 5 ) 2 , abbreviation: DEDCS) gas, 1,1,2,2-tetrachloro-1,2-d
- a rare gas such as nitrogen (N 2 ) gas, argon (Ar) gas, helium (He) gas, neon (Ne) gas, xenon (Xe) gas can be used. This point is the same in each step described later.
- Step 2 the first N and H-containing gases are supplied to the wafer 200 in the processing chamber 201.
- valve 243b is opened to allow the first N and H-containing gas to flow into the gas supply pipe 232b.
- the flow rates of the first N and H-containing gases are adjusted by the MFC 241b, are supplied into the processing chamber 201 via the nozzle 249b, and are exhausted from the exhaust port 231a.
- the first N and H-containing gas is supplied to the wafer 200 (first N and H-containing gas supply).
- the valves 243e to 243g may be opened to supply the inert gas into the processing chamber 201 via the nozzles 249a to 249c.
- the valve 243b is closed and the supply of the first N and H-containing gas into the processing chamber 201 is stopped. Then, the gas and the like remaining in the processing chamber 201 are removed from the processing chamber 201 by the same processing procedure and treatment conditions as in the purge in step 1.
- Examples of the first N and H-containing gas include hydrogen nitride-based gas such as ammonia (NH 3 ) gas, monoethylamine (C 2 H 5 NH 2 , abbreviated as MEA) gas, and diethyl amine ((C 2 H 5 ) 2 ).
- hydrogen nitride-based gas such as ammonia (NH 3 ) gas, monoethylamine (C 2 H 5 NH 2 , abbreviated as MEA) gas, and diethyl amine ((C 2 H 5 ) 2 ).
- DEA triethylamine
- TEA triethylamine
- MMA monomethylamine
- DMA dimethylamine
- TMA trimethylamine
- MMH monomethylhydrazine
- DMH Dimethylhydrazine ((CH 3 ) 2 N 2 H 2 , abbreviation: DMH) gas, trimethylhydrazine ((CH 3 ) 2 N 2 (CH 3 ) H, abbreviation: TMH) gas and other organic hydrazine gas, pyridine Cyclic amine-based gas such as (C 5 H 5 N) gas and piperazine (C 4 H 10 N 2) gas can be used.
- Step 3 the second N and H-containing gas is supplied to the wafer 200 in the processing chamber 201.
- valve 243c is opened to allow the second N and H-containing gas to flow into the gas supply pipe 232c.
- the flow rate of the second N and H-containing gas is adjusted by the MFC 241c, is supplied into the processing chamber 201 via the nozzle 249c, and is exhausted from the exhaust port 231a.
- the second N and H-containing gas is supplied to the wafer 200 (second N and H-containing gas supply).
- the valves 243e to 243g may be opened to supply the inert gas into the processing chamber 201 via the nozzles 249a to 249c.
- the valve 243c is closed and the supply of the second N and H-containing gas into the processing chamber 201 is stopped. Then, the gas and the like remaining in the processing chamber 201 are removed from the processing chamber 201 by the same processing procedure and treatment conditions as in the purge in step 1.
- the second N and H-containing gas for example, hydrogen nitride-based gas such as ammonia (NH 3 ) gas, diimide (N 2 H 2 ) gas, hydrazine (N 2 H 4 ) gas, and N 3 H 8 gas should be used. Can be done.
- the second N and H-containing gas it is preferable to use a gas having a molecular structure different from that of the first N and H-containing gas. However, depending on the treatment conditions, it is also possible to use a gas having the same molecular structure as the first N and H-containing gas as the second N and H-containing gas.
- steps 1 to 3 are performed non-simultaneously, that is, cycles without synchronization are performed a predetermined number of times (n times, n is an integer of 1 or more).
- the cycle is performed a predetermined number of times under the condition (temperature) in which the physical adsorption of the raw material gas occurs more predominantly than the chemical adsorption of the raw material gas.
- the cycle is performed a predetermined number of times under the condition (temperature) in which the physical adsorption of the raw material gas occurs more predominantly than the thermal decomposition of the raw material gas and the chemical adsorption of the raw material gas. ..
- the cycle is carried out under a condition (temperature) in which the physical adsorption of the raw material gas occurs predominantly rather than the chemical adsorption of the raw material gas without thermal decomposition of the raw material gas. Perform a predetermined number of times. Further, preferably, the cycle is performed a predetermined number of times under the condition (temperature) that causes the oligomer-containing layer to have fluidity.
- the oligomer-containing layer is allowed to flow into the recess formed on the surface of the wafer 200 and flowed into the recess, and the cycle is carried out under the condition (temperature) that the inside of the recess is filled with the oligomer-containing layer from the depth of the recess. Perform a predetermined number of times.
- Raw material gas supply flow rate 10 to 1000 sccm
- Raw material gas supply time 1 to 300 seconds
- Processing pressure 10 to 6000 Pa, preferably 50 to 2000 Pa Is exemplified.
- the treatment conditions for supplying the first N and H-containing gas are as follows. 1st N and H-containing gas supply flow rate: 10 to 5000 sccm The first N and H-containing gas supply time: 1 to 300 seconds is exemplified. Other treatment conditions can be the same as the treatment conditions in the raw material gas supply.
- the treatment conditions for supplying the second N and H-containing gas are as follows. 2nd N and H-containing gas supply flow rate: 10 to 5000 sccm Second N and H-containing gas supply time: 1 to 300 seconds is exemplified. Other treatment conditions can be the same as the treatment conditions in the raw material gas supply.
- At least one of the raw material gas, the first N and H-containing gas, and the second N and H-containing gas It is possible to generate an oligomer containing an element contained in any of the elements on the surface of the wafer 200 and in the recess, grow it, and allow it to flow to form an oligomer-containing layer on the surface of the wafer 200 and in the recess. ..
- the oligomer refers to a polymer having a relatively low molecular weight (for example, a molecular weight of 10,000 or less) to which a relatively small amount (for example, 10 to 100) of monomers (monomers) are bonded.
- a relatively low molecular weight for example, a molecular weight of 10,000 or less
- a relatively small amount for example, 10 to 100
- monomers monomers
- the oligomer-containing layer is, for example, , Si, Cl, N and other elements, and substances represented by the chemical formula of C x H 2x + 1 (x is an integer of 1 to 3) such as CH 3 and C 2 H 5.
- the processing temperature is set to less than 0 ° C.
- the raw material gas supplied into the processing chamber 201 is likely to be liquefied, and it may be difficult to supply the raw material gas to the wafer 200 in a gaseous state. ..
- the reaction for forming the above-mentioned oligomer-containing layer may be difficult to proceed, and it may be difficult to form the oligomer-containing layer on the surface of the wafer 200 and in the recess.
- the treatment temperature is set to a temperature higher than 150 ° C.
- the catalytic action by the first N and H-containing gas described later becomes weak, and the reaction for forming the above-mentioned oligomer-containing layer may be difficult to proceed.
- the oligomers formed on the surface of the wafer 200 and in the recesses are dominated by desorption rather than growing, and it is difficult to form an oligomer-containing layer on the surface and the recesses of the wafer 200. May become.
- the treatment temperature By setting the treatment temperature to 150 ° C. or lower, this problem can be solved.
- the treatment temperature By setting the treatment temperature to 100 ° C. or lower, this problem can be sufficiently solved, and by setting the treatment temperature to 60 ° C. or lower, this problem can be solved more sufficiently.
- the treatment temperature is 0 ° C. or higher and 150 ° C. or lower, preferably 10 ° C. or higher and 100 ° C. or lower, and more preferably 20 ° C. or higher and 60 ° C. or lower.
- the processing conditions for purging are Inert gas supply flow rate (for each gas supply pipe): 10 to 20000 sccm Inert gas supply time: 1 to 300 seconds Processing pressure: 10 to 6000 Pa Is exemplified.
- Other treatment conditions can be the same as the treatment conditions in the raw material gas supply.
- the flow of the oligomer-containing layer formed on the surface of the wafer 200 and in the recess is promoted, and the surplus components contained in the oligomer-containing layer, for example, surplus gas and Cl.
- By-products containing the above can be discharged.
- the temperature of the wafer 200 is preferably changed to a second temperature equal to or higher than the above-mentioned first temperature, preferably higher than the above-mentioned first temperature.
- the output of the heater 207 is adjusted so as to change to a higher second temperature.
- an inert gas such as N 2 gas is supplied as the N-containing gas to the wafer 200 in the processing chamber 201.
- the valves 243e to 243g are opened to allow the inert gas to flow into the gas supply pipes 232e to 232g.
- the flow rate of the inert gas is adjusted by the MFCs 241e to 241g, is supplied into the processing chamber 201 via the nozzles 249a to 249c, and is exhausted from the exhaust port 231a. At this time, the inert gas is supplied to the wafer 200.
- This step is preferably performed under conditions that cause fluidity in the oligomer-containing layer formed on the surface of the wafer 200 and in the recess. Further, in this step, while promoting the flow of the oligomer-containing layer formed on the surface of the wafer 200 and in the recess, the surplus components contained in the oligomer-containing layer, for example, surplus gas and by-products containing Cl are removed. It is preferable to carry out under the conditions of discharging and densifying the oligomer-containing layer.
- Inert gas supply flow rate (for each gas supply pipe): 10 to 20000 sccm Processing temperature (second temperature): 100 to 1000 ° C, preferably 200 to 600 ° C Processing pressure: 10 to 80,000 Pa, preferably 200 to 6000 Pa Processing time: 300 to 10800 seconds is exemplified.
- the oligomer-containing layer formed on the surface of the wafer 200 and in the recess can be modified.
- SiCN film silicon carbonitriding film
- excess components contained in the oligomer-containing layer can be discharged, and the oligomer-containing layer can be densified.
- an inert gas as a purge gas is supplied from each of the nozzles 249a to 249c into the processing chamber 201 and exhausted from the exhaust port 231a.
- the inside of the treatment chamber 201 is purged, and the gas and reaction by-products remaining in the treatment chamber 201 are removed from the inside of the treatment chamber 201 (after-purge).
- the atmosphere in the treatment chamber 201 is replaced with the inert gas (replacement of the inert gas), and the pressure in the treatment chamber 201 is restored to the normal pressure (return to atmospheric pressure).
- the seal cap 219 is lowered by the boat elevator 115, and the lower end of the manifold 209 is opened. Then, the processed wafer 200 is carried out (boat unloading) from the lower end of the manifold 209 to the outside of the reaction tube 203 while being supported by the boat 217. After the boat is unloaded, the shutter 219s is moved and the lower end opening of the manifold 209 is sealed by the shutter 219s via the O-ring 220c (shutter close). The processed wafer 200 is carried out of the reaction tube 203 and then taken out from the boat 217 (wafer discharge).
- the cycle is performed a predetermined number of times under the condition that the physical adsorption of the raw material gas is more dominant than the chemical adsorption of the raw material gas.
- the fluidity of the oligomer-containing layer can be increased, and the embedding characteristics of the film formed in the recess can be improved.
- the cycle is carried out under the condition that when the raw material gas is present alone, the physical adsorption of the raw material gas occurs more predominantly than the thermal decomposition of the raw material gas and the chemical adsorption of the raw material gas.
- the cycle is carried out under the condition that when the raw material gas is present alone, the physical adsorption of the raw material gas occurs more predominantly than the thermal decomposition of the raw material gas and the chemical adsorption of the raw material gas.
- the oligomer-containing layer is allowed to flow into the recess, and the recess is filled with the oligomer-containing layer from the depth of the recess by performing a cycle a predetermined number of times. It is possible to improve the embedding characteristics of the film formed inside.
- Si, C, and Cl can be contained in the oligomer-containing layer.
- the oligomer-containing layer In the formation of the oligomer-containing layer, it is formed in the recess by performing a cycle of supplying the raw material gas, supplying the first N and H-containing gas, and supplying the second N and H-containing gas non-simultaneously a predetermined number of times. It is possible to improve the embedding characteristics of the membrane.
- the (j) oligomer-containing layer it is possible to improve the embedding characteristics of the film formed in the recess by performing purging at a predetermined timing. In addition, it is possible to reduce the impurity concentration of the film formed so as to embed the inside of the recess. This makes it possible to improve the wet etching resistance of the film formed in the recess.
- the above-mentioned effect is obtained when the above-mentioned various raw material gases, the above-mentioned various first N and H-containing gases, the above-mentioned various second N and H-containing gases, and the above-mentioned various inert gases are used in forming the oligomer-containing layer. Can be obtained in the same way. Further, the above-mentioned effect can be similarly obtained even when the gas supply order in the cycle is changed. Further, the above-mentioned effect can be similarly obtained when a gas other than the N-containing gas is used in the post treatment.
- the first N and H-containing gas to be flowed for the first time in the cycle acts as a catalyst to activate the raw material gas.
- the first N and H-containing gas to be flowed for the second time in the cycle can act as a gas for removing by-products generated during the formation of the oligomer-containing layer, that is, a reactive purge gas.
- the treatment conditions for supplying the first N and H-containing gas can be the same as the treatment conditions for supplying the first N and H-containing gas described above, respectively.
- an H-containing gas such as hydrogen (H 2 ) gas may be supplied to the wafer 200 on which the oligomer-containing layer is formed, and N-containing gases such as NH 3 gas, that is, N and H.
- the contained gas may be supplied , or O-containing gas such as H 2 O gas, that is, O and H-containing gas may be supplied.
- O 2 gas may be supplied as the O-containing gas. That is, in the post treatment, at least one of N-containing gas, H-containing gas, N and H-containing gas, O-containing gas, and O and H-containing gas is supplied to the wafer 200 on which the oligomer-containing layer is formed. You may.
- H-containing gas supply flow rate 10 to 3000 sccm Processing temperature (second temperature): 100 to 1000 ° C, preferably 200 to 600 ° C Processing pressure: 10 to 1000 Pa, preferably 200 to 800 Pa Processing time: 300 to 10800 seconds is exemplified.
- N and H-containing gas supply flow rate 10 to 10000 sccm Processing temperature (second temperature): 100 to 1000 ° C, preferably 200 to 600 ° C Processing pressure: 10 to 6000 Pa, preferably 200 to 2000 Pa Processing time: 300 to 10800 seconds is exemplified.
- O-containing gas supply flow rate 10 to 10000 sccm
- Treatment temperature (second temperature) 100 to 1000 ° C, preferably 100 to 600 ° C
- Processing pressure 10 to 90,000 Pa, preferably 20,000 to 80,000 Pa
- Processing time 300 to 10800 seconds is exemplified.
- the case of performing the post-treatment in the atmosphere of H-containing gas or the case of performing the post-treatment in the atmosphere of N and H-containing gas is more than the case of performing the post-treatment in the atmosphere of an inert gas such as N 2 gas.
- the fluidity of the oligomer-containing layer can be increased, and the embedding property of the film formed in the recess can be improved.
- the case of performing post-treatment in an atmosphere of H-containing gas or the case of performing post-treatment in an atmosphere of N and H-containing gas is more than the case of performing post-treatment in an atmosphere of an inert gas such as N 2 gas.
- N-containing gas of the N 2 gas or the like to the wafer 200 to the oligomer-containing layer is formed, H-containing gas such as H 2 gas, and, at least one of N and H containing gas such as NH 3 gas
- O-containing gas O and H-containing gas
- the first step can be referred to as a first post treatment
- the second step can be referred to as a second post treatment.
- the treatment conditions in each of the first and second post treatments can be the same as the treatment conditions in each of the above-mentioned post treatments.
- O is contained in the film formed by modifying the oligomer-containing layer, and this film can be used as a SiOCN film. Further, by using O and H-containing gas such as H 2 O gas having a relatively low oxidizing power as the O-containing gas, it is possible to suppress the desorption of C from the SiOCN film in which the oligomer-containing layer is modified. Is possible. Further, by performing the first and second post treatments in this order, it becomes possible to suppress the desorption of C from the SiOCN film in which the oligomer-containing layer is modified.
- first aspect and the third aspect may be combined as in the processing sequence shown below.
- the oligomer-containing layer formation and the post-treatment are performed in the same treatment chamber 201 (in-situ) in the same treatment chamber 201 (in-situ).
- the present disclosure is not limited to such aspects.
- the oligomer-containing layer formation and the post-treatment may be performed in separate treatment chambers (ex-situ).
- the same effect as the effect in the above-described embodiment can be obtained.
- the wafer 200 is not exposed to the atmosphere on the way, and these processes can be performed consistently while the wafer 200 is kept under vacuum. It is possible to perform stable substrate processing.
- the temperature in each processing chamber can be set in advance to, for example, the processing temperature at each step or a temperature close to it, and the time required for temperature adjustment can be shortened. Production efficiency can be increased.
- the present disclosure is not limited to these examples. That is, the silicon nitride film (SiN film) and silicon are formed by arbitrarily combining the gas types of the raw material gas, the first N and H-containing gas, and the second N and H-containing gas so as to embed the recess formed on the surface of the wafer 200.
- the present disclosure is also suitably applicable to the case of forming an oxide film (SiO film), a silicon acid carbide film (SiOC film), and a silicon film (Si film). In these cases as well, the same effects as those in the above-described embodiment can be obtained.
- the recipes used for the substrate processing are individually prepared according to the processing content and stored in the storage device 121c via a telecommunication line or an external storage device 123. Then, when starting the processing, 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 content of the substrate processing. As a result, it becomes possible to form films having various film types, composition ratios, film qualities, and film thicknesses with good reproducibility with one substrate processing device. In addition, the burden on the operator can be reduced, and the process 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.
- an example of forming a film using a batch type substrate processing apparatus that processes a plurality of substrates at one time has been described.
- the present disclosure is not limited to the above-described embodiment, and can be suitably applied to, for example, a case where a film is formed by using a single-wafer type substrate processing apparatus that processes one or several substrates at a time.
- an example of forming a film using a substrate processing apparatus having a hot wall type processing furnace has been described.
- the present disclosure is not limited to the above-described embodiment, and can be suitably applied to the case where a film is formed by using a substrate processing apparatus having a cold wall type processing furnace.
- the film can be formed under the same sequence and processing conditions as the above-mentioned aspects and modifications, and the same effects as these can be obtained.
- processing procedure and processing conditions at this time can be, for example, the same as the processing procedure and processing conditions of the above-described aspect.
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Abstract
Description
(a)表面に凹部が形成された基板に対して原料ガスを供給する工程と、前記基板に対して第1窒素及び水素含有ガスを供給する工程と、前記基板に対して第2窒素及び水素含有ガスを供給する工程と、を含むサイクルを、第1温度下で所定回数行うことで、前記原料ガス、前記第1窒素及び水素含有ガス、および前記第2窒素及び水素含有ガスのうち少なくともいずれかに含まれる元素を含むオリゴマーを、前記基板の表面と前記凹部内とに生成し、成長させて、流動させ、前記基板の表面と前記凹部内とにオリゴマー含有層を形成する工程と、
(b)前記基板の表面と前記凹部内とに前記オリゴマー含有層が形成された前記基板に対して、前記第1温度以上の第2温度下でポストトリートメントを行うことで、前記基板の表面と前記凹部内とに形成された前記オリゴマー含有層を改質させて、前記凹部内を埋め込むように、前記オリゴマー含有層が改質されてなる膜を形成する工程と、
を行う技術が提供される。
以下、本開示の第1態様について図1~図4を参照しながら説明する。
図1に示すように、処理炉202は加熱機構(温度調整部)としてのヒータ207を有する。ヒータ207は円筒形状であり、保持板に支持されることにより垂直に据え付けられている。ヒータ207は、ガスを熱で活性化(励起)させる活性化機構(励起部)としても機能する。
上述の基板処理装置を用い、半導体装置の製造工程の一工程として、基板としてのウエハ200の表面上に膜を形成する処理シーケンス例について、主に図4を用いて説明する。なお、本態様では、ウエハ200として、その表面にトレンチやホール等の凹部が形成されたシリコン基板(シリコンウエハ)を用いる例について説明する。以下の説明において、基板処理装置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。
表面に凹部が形成されたウエハ200に対して原料ガスを供給するステップ(原料ガス供給)と、ウエハ200に対して第1N及びH含有ガスを供給するステップ(第1N及びH含有ガス供給)と、ウエハ200に対して第2N及びH含有ガスを供給するステップ(第2N及びH含有ガス供給)と、を含むサイクルを、第1温度下で所定回数(n回、nは1以上の整数)行うことで、原料ガス、第1N及びH含有ガス、および第2N及びH含有ガスのうち少なくともいずれかに含まれる元素を含むオリゴマーを、ウエハ200の表面と凹部内とに生成し、成長させて、流動させ、ウエハ200の表面と凹部内とにオリゴマー含有層を形成するステップ(オリゴマー含有層形成)と、
ウエハ200の表面と凹部内とにオリゴマー含有層が形成されたウエハ200に対して、第1温度以上の第2温度下でポストトリートメント(以下、PTとも称する)を行うことで、ウエハ200の表面と凹部内とに形成されたオリゴマー含有層を改質させて、凹部内を埋め込むように、オリゴマー含有層が改質されてなる膜を形成するステップ(PT)と、
を行う。
複数枚のウエハ200がボート217に装填(ウエハチャージ)された後、シャッタ開閉機構115sによりシャッタ219sが移動させられて、マニホールド209の下端開口が開放される(シャッタオープン)。その後、図1に示すように、複数枚のウエハ200を支持したボート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内へ搬入(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。
ボートロードが終了した後、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(減圧排気)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244がフィードバック制御される(圧力調整)。また、処理室201内のウエハ200が所望の処理温度となるように、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への通電具合がフィードバック制御される(温度調整)。また、回転機構267によるウエハ200の回転を開始する。処理室201内の排気、ウエハ200の加熱および回転は、いずれも、少なくともウエハ200に対する処理が終了するまでの間は継続して行われる。
その後、次のステップ1~3を順次実行する。
このステップでは、処理室201内のウエハ200に対して原料ガスを供給する。
このステップでは、処理室201内のウエハ200に対して第1N及びH含有ガスを供給する。
このステップでは、処理室201内のウエハ200に対して第2N及びH含有ガスを供給する。
その後、上述したステップ1~3を非同時に、すなわち、同期させることなく行うサイクルを所定回数(n回、nは1以上の整数)行う。
原料ガス供給流量:10~1000sccm
原料ガス供給時間:1~300秒
不活性ガス供給流量(ガス供給管毎):10~10000sccm
処理温度(第1温度):0~150℃、好ましくは10~100℃、より好ましくは20~60℃
処理圧力:10~6000Pa、好ましくは50~2000Pa
が例示される。
第1N及びH含有ガス供給流量:10~5000sccm
第1N及びH含有ガス供給時間:1~300秒
が例示される。他の処理条件は、原料ガス供給における処理条件と同様とすることができる。
第2N及びH含有ガス供給流量:10~5000sccm
第2N及びH含有ガス供給時間:1~300秒
が例示される。他の処理条件は、原料ガス供給における処理条件と同様とすることができる。
不活性ガス供給流量(ガス供給管毎):10~20000sccm
不活性ガス供給時間:1~300秒
処理圧力:10~6000Pa
が例示される。他の処理条件は、原料ガス供給における処理条件と同様とすることができる。
ウエハ200の表面と凹部内とにオリゴマー含有層が形成された後、ウエハ200の温度を、上述の第1温度以上の第2温度へ変更させるように、好ましくは、上述の第1温度よりも高い第2温度へ変更させるように、ヒータ207の出力を調整する。
不活性ガス供給流量(ガス供給管毎):10~20000sccm
処理温度(第2温度):100~1000℃、好ましくは200~600℃
処理圧力:10~80000Pa、好ましくは200~6000Pa
処理時間:300~10800秒
が例示される。
SiCN膜の形成が完了した後、ノズル249a~249cのそれぞれからパージガスとしての不活性ガスを処理室201内へ供給し、排気口231aより排気する。これにより、処理室201内がパージされ、処理室201内に残留するガスや反応副生成物が処理室201内から除去される(アフターパージ)。その後、処理室201内の雰囲気が不活性ガスに置換され(不活性ガス置換)、処理室201内の圧力が常圧に復帰される(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。そして、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。ボートアンロードの後は、シャッタ219sが移動させられ、マニホールド209の下端開口がOリング220cを介してシャッタ219sによりシールされる(シャッタクローズ)。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)。
本態様によれば、以下に示す1つ又は複数の効果が得られる。
続いて、本開示の第2態様について、主に図5を参照しながら説明する。
ウエハ200に対して原料ガスを供給するステップと、ウエハ200に対して第1N及びH含有ガスを供給するステップと、を同時に行うステップと、
ウエハ200に対して第2N及びH含有ガスを供給するステップと、
を非同時に行うサイクルを所定回数(n回、nは1以上の整数)行うようにしてもよい。
続いて、本開示の第3態様について、主に図6を参照しながら説明する。
ウエハ200に対して原料ガスを供給するステップと、ウエハ200に対して第1N及びH含有ガスを供給するステップと、を同時に行うステップと、
ウエハ200に対して第2N及びH含有ガスを供給するステップと、
ウエハ200に対して第1N及びH含有ガスを供給するステップと、
を非同時に行うサイクルを所定回数(n回、nは1以上の整数)行うようにしてもよい。
以上、本開示の種々の態様を具体的に説明した。但し、本開示は上述の態様に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。
H含有ガス供給流量:10~3000sccm
処理温度(第2温度):100~1000℃、好ましくは200~600℃
処理圧力:10~1000Pa、好ましくは200~800Pa
処理時間:300~10800秒
が例示される。
N及びH含有ガス供給流量:10~10000sccm
処理温度(第2温度):100~1000℃、好ましくは200~600℃
処理圧力:10~6000Pa、好ましくは200~2000Pa
処理時間:300~10800秒
が例示される。
O含有ガス供給流量:10~10000sccm
処理温度(第2温度):100~1000℃、好ましくは100~600℃
処理圧力:10~90000Pa、好ましくは20000~80000Pa
処理時間:300~10800秒
が例示される。
オリゴマー含有層が形成されたウエハ200に対してN2ガス等のN含有ガス、H2ガス等のH含有ガス、および、NH3ガス等のN及びH含有ガスのうち少なくともいずれかを供給するステップと、
オリゴマー含有層が形成されたウエハ200に対してH2Oガス等のO含有ガス(O及びH含有ガス)を供給するステップと、
を非同時に行うようにしてもよい。この場合、上記2つのステップのうち、前段のステップを第1ポストトリートメント、後段のステップを第2ポストトリートメントと称することができる。
ウエハ200に対して原料ガスを供給するステップと、
ウエハ200に対して第1N及びH含有ガスを供給するステップと、
ウエハ200に対して第2N及びH含有ガスを供給するステップと、
ウエハ200に対して第1N及びH含有ガスを供給するステップと、
を非同時に行うサイクルを所定回数(n回、nは1以上の整数)行うようにしてもよい。
201 処理室
Claims (20)
- (a)表面に凹部が形成された基板に対して原料ガスを供給する工程と、前記基板に対して第1窒素及び水素含有ガスを供給する工程と、前記基板に対して第2窒素及び水素含有ガスを供給する工程と、を含むサイクルを、第1温度下で所定回数行うことで、前記原料ガス、前記第1窒素及び水素含有ガス、および前記第2窒素及び水素含有ガスのうち少なくともいずれかに含まれる元素を含むオリゴマーを、前記基板の表面と前記凹部内とに生成し、成長させて、流動させ、前記基板の表面と前記凹部内とにオリゴマー含有層を形成する工程と、
(b)前記基板の表面と前記凹部内とに前記オリゴマー含有層が形成された前記基板に対して、前記第1温度以上の第2温度下でポストトリートメントを行うことで、前記基板の表面と前記凹部内とに形成された前記オリゴマー含有層を改質させて、前記凹部内を埋め込むように、前記オリゴマー含有層が改質されてなる膜を形成する工程と、
を有する半導体装置の製造方法。 - (a)では、前記原料ガスが単独で存在した場合に、前記原料ガスの化学吸着よりも前記原料ガスの物理吸着の方が支配的に生じる条件下で、前記サイクルを所定回数行う請求項1に記載の半導体装置の製造方法。
- (a)では、前記原料ガスが単独で存在した場合に、前記原料ガスの熱分解および前記原料ガスの化学吸着よりも前記原料ガスの物理吸着の方が支配的に生じる条件下で、前記サイクルを所定回数行う請求項1に記載の半導体装置の製造方法。
- (a)では、前記原料ガスが単独で存在した場合に、前記原料ガスが熱分解することなく前記原料ガスの化学吸着よりも前記原料ガスの物理吸着の方が支配的に生じる条件下で、前記サイクルを所定回数行う請求項1に記載の半導体装置の製造方法。
- (a)では、前記オリゴマー含有層に流動性を生じさせる条件下で、前記サイクルを所定回数行う請求項1に記載の半導体装置の製造方法。
- (a)では、前記オリゴマー含有層を前記凹部内の奥に流動させて流れ込ませ、前記凹部内の奥から前記凹部内を前記オリゴマー含有層により埋め込む条件下で、前記サイクルを所定回数行う請求項1に記載の半導体装置の製造方法。
- (a)における前記サイクルは、
前記基板に対して前記原料ガスを供給する工程と、
前記基板に対して前記第1窒素及び水素含有ガスを供給する工程と、
前記基板に対して前記第2窒素及び水素含有ガスを供給する工程と、
を非同時に行うことを含む請求項1に記載の半導体装置の製造方法。 - (a)における前記サイクルは、
前記基板に対して前記原料ガスを供給する工程と、前記基板に対して前記第1窒素及び水素含有ガスを供給する工程と、を同時に行う工程と、
前記基板に対して前記第2窒素及び水素含有ガスを供給する工程と、
を非同時に行うことを含む請求項1に記載の半導体装置の製造方法。 - (a)における前記サイクルは、
前記基板に対して前記原料ガスを供給する工程と、前記基板に対して前記第1窒素及び水素含有ガスを供給する工程と、を同時に行う工程と、
前記基板に対して前記第2窒素及び水素含有ガスを供給する工程と、
前記基板に対して前記第1窒素及び水素含有ガスを供給する工程と、
を非同時に行うことを含む請求項1に記載の半導体装置の製造方法。 - (a)における前記サイクルは、更に、前記基板が存在する空間をパージする工程を含み、
前記パージにより、前記オリゴマー含有層の流動を促進させつつ、前記オリゴマー含有層に含まれる余剰成分を排出させる請求項1に記載の半導体装置の製造方法。 - (b)では、前記オリゴマー含有層に流動性を生じさせる条件下で、前記ポストトリートメントを行う請求項1に記載の半導体装置の製造方法。
- (b)では、前記オリゴマー含有層の流動を促進させつつ、前記オリゴマー含有層に含まれる余剰成分を排出させ、前記オリゴマー含有層を緻密化させる請求項1に記載の半導体装置の製造方法。
- 前記原料ガスは、シリコンおよびハロゲンを含有する請求項1に記載の半導体装置の製造方法。
- 前記原料ガスは、シリコン、炭素、およびハロゲンを含有する請求項1に記載の半導体装置の製造方法。
- 前記第1窒素及び水素含有ガスと、前記第2窒素及び水素含有ガスとは、分子構造が異なる請求項1に記載の半導体装置の製造方法。
- 前記第1窒素及び水素含有ガスはアミン系ガスであり、前記第2窒素及び水素含有ガスは窒化水素系ガスである請求項1に記載の半導体装置の製造方法。
- (b)では、前記基板に対して窒素含有ガス、水素含有ガス、窒素及び水素含有ガス、および、酸素含有ガスのうち少なくともいずれかを供給する請求項1に記載の半導体装置の製造方法。
- (b)は、
前記基板に対して窒素含有ガス、水素含有ガス、および、窒素及び水素含有ガスのうち少なくともいずれかを供給する工程と、
前記基板に対して酸素含有ガスを供給する工程と、
を含む請求項1に記載の半導体装置の製造方法。 - 基板が処理される処理室と、
前記処理室内の基板に対して原料ガスを供給する原料ガス供給系と、
前記処理室内の基板に対して第1窒素及び水素含有ガスを供給する第1窒素及び水素含有ガス供給系と、
前記処理室内の基板に対して第2窒素及び水素含有ガスを供給する第2窒素及び水素含有ガス供給系と、
前記処理室内の基板を加熱するヒータと、
前記処理室内において、(a)表面に凹部が形成された基板に対して前記原料ガスを供給する処理と、前記基板に対して前記第1窒素及び水素含有ガスを供給する処理と、前記基板に対して前記第2窒素及び水素含有ガスを供給する処理と、を含むサイクルを、第1温度下で所定回数行うことで、前記原料ガス、前記第1窒素及び水素含有ガス、および前記第2窒素及び水素含有ガスのうち少なくともいずれかに含まれる元素を含むオリゴマーを、前記基板の表面と前記凹部内とに生成し、成長させて、流動させ、前記基板の表面と前記凹部内とにオリゴマー含有層を形成する処理と、(b)前記基板の表面と前記凹部内とにオリゴマー含有層が形成された前記基板に対して、前記第1温度以上の第2温度下でポストトリートメントを行うことで、前記基板の表面と前記凹部内とに形成された前記オリゴマー含有層を改質させて、前記凹部内を埋め込むように、前記オリゴマー含有層が改質されてなる膜を形成する処理と、を行わせるように、前記原料ガス供給系、前記第1窒素及び水素含有ガス供給系、前記第2窒素及び水素含有ガス供給系、および前記ヒータ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。 - 基板処理装置の処理室内において、
(a)表面に凹部が形成された基板に対して原料ガスを供給する手順と、前記基板に対して第1窒素及び水素含有ガスを供給する手順と、前記基板に対して第2窒素及び水素含有ガスを供給する手順と、を含むサイクルを、第1温度下で所定回数行うことで、前記原料ガス、前記第1窒素及び水素含有ガス、および前記第2窒素及び水素含有ガスのうち少なくともいずれかに含まれる元素を含むオリゴマーを、前記基板の表面と前記凹部内とに生成し、成長させて、流動させ、前記基板の表面と前記凹部内とにオリゴマー含有層を形成する手順と、
(b)前記基板の表面と前記凹部内とに前記オリゴマー含有層が形成された前記基板に対して、前記第1温度以上の第2温度下でポストトリートメントを行うことで、前記基板の表面と前記凹部内とに形成された前記オリゴマー含有層を改質させて、前記凹部内を埋め込むように、前記オリゴマー含有層が改質されてなる膜を形成する手順と、
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。
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