WO2015136673A1 - 半導体装置の製造方法、基板処理装置及び記録媒体 - Google Patents
半導体装置の製造方法、基板処理装置及び記録媒体 Download PDFInfo
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- WO2015136673A1 WO2015136673A1 PCT/JP2014/056752 JP2014056752W WO2015136673A1 WO 2015136673 A1 WO2015136673 A1 WO 2015136673A1 JP 2014056752 W JP2014056752 W JP 2014056752W WO 2015136673 A1 WO2015136673 A1 WO 2015136673A1
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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
- C23C16/405—Oxides of refractory metals or yttrium
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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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- 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
- C23C16/45534—Use of auxiliary reactants other than used for contributing to the composition of the main film, e.g. catalysts, activators or scavengers
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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
- C23C16/52—Controlling or regulating the coating process
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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
- H01L21/02186—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 titanium, e.g. TiO2
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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
- H01L21/02277—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 the reactions being activated by other means than plasma or thermal, e.g. photo-CVD
Definitions
- the present invention relates to a method for manufacturing a semiconductor device, a substrate processing apparatus, and a recording medium.
- a film forming process is performed in which a raw material or an oxidizing agent containing a metal element is supplied to the substrate to form an oxide film containing the metal element on the substrate. is there.
- the present invention provides a technique capable of increasing the productivity of film formation and improving the film quality when forming an oxide film containing a metal element on a substrate using a raw material and an oxidizing agent. Objective.
- a raw material containing a metal element and a halogen group to the substrate; Supplying an oxidizing agent to the substrate; Performing a non-simultaneous cycle a predetermined number of times to form an oxide film containing the metal element on the substrate,
- a catalyst is supplied to the substrate together with the oxidizing agent,
- a semiconductor device manufacturing method is provided in which the catalyst is not supplied to the substrate.
- a processing chamber for accommodating the substrate;
- a raw material supply system for supplying a raw material containing a metal element and a halogen group to a substrate in the processing chamber;
- An oxidizing agent supply system for supplying an oxidizing agent to the substrate in the processing chamber;
- a catalyst supply system for supplying a catalyst to the substrate in the processing chamber;
- a cycle in which the process of supplying the raw material to the substrate in the processing chamber and the process of supplying the oxidant to the substrate in the processing chamber are performed simultaneously is performed a predetermined number of times on the substrate.
- the catalyst is supplied together with the oxidant to the substrate, and the process of supplying the raw material is performed in the process of supplying the raw material.
- a controller configured to control the raw material supply system, the oxidant supply system, and the catalyst supply system so that the catalyst is not supplied to the substrate;
- a substrate processing apparatus is provided.
- a catalyst is supplied to the substrate together with the oxidizing agent,
- a computer-readable recording medium recording a program for not supplying the catalyst to the substrate is provided.
- the present invention when forming an oxide film containing a metal element on a substrate using a raw material and an oxidizing agent, it is possible to increase the productivity of the film forming process and improve the film quality.
- FIG. 2 is a schematic configuration diagram of a vertical processing furnace of a substrate processing apparatus preferably used in an embodiment of the present invention, and is a diagram showing a processing furnace part in a cross-sectional view taken along line AA of FIG.
- the controller of the substrate processing apparatus used suitably by one Embodiment of this invention and is a figure which shows the control system of a controller with a block diagram. It is a figure which shows the timing of the gas supply in the film-forming sequence of one Embodiment of this invention.
- FIG. 6 is a diagram illustrating gas supply timings in a film forming sequence of Comparative Example 1.
- FIG. 6 is a diagram illustrating gas supply timings in a film forming sequence of Comparative Example 2.
- FIG. 6 is a diagram illustrating gas supply timings in a film forming sequence of Comparative Example 3.
- FIG. (A) is a figure which shows a part of evaluation result of the film-forming rate of a TiO film
- (B) is a figure which shows collectively the film-forming rate of a TiO film
- FIG. 1 It is a schematic block diagram of the processing furnace of the substrate processing apparatus used suitably by other embodiment of this invention, and is a figure which shows a processing furnace part with a longitudinal cross-sectional view. It is a schematic block diagram of the processing furnace of the substrate processing apparatus used suitably by other embodiment of this invention, and is a figure which shows a processing furnace part with a longitudinal cross-sectional view.
- A is a figure which shows the name of a cyclic amine, a chemical composition formula, a chemical structural formula, and an acid dissociation constant.
- (B) is a figure which shows the name of TEA which is a chain amine, a chemical composition formula, a chemical structural formula, and an acid dissociation constant.
- (C) is a figure which shows the name of DEA which is a chain amine, a chemical composition formula, a chemical structural formula, and an acid dissociation constant.
- (D) is a figure which shows the name of MEA which is a chain amine, a chemical composition formula, a chemical structural formula, and an acid dissociation constant.
- (E) is a figure which shows the name of TMA which is a chain amine, a chemical composition formula, a chemical structural formula, and an acid dissociation constant.
- (F) is a figure which shows the name of MMA which is a chain amine, a chemical composition formula, a chemical structural formula, and an acid dissociation constant.
- the processing furnace 202 has a heater 207 as heating means (heating mechanism).
- the heater 207 has a cylindrical shape and is vertically installed by being supported by a heater base (not shown) as a holding plate.
- the heater 207 also functions as an activation mechanism (excitation unit) that activates (excites) gas with heat.
- a reaction tube 203 is disposed inside the heater 207 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 opened.
- a manifold (inlet flange) 209 is disposed below the reaction tube 203 concentrically with the reaction tube 203.
- the manifold 209 is made of a metal such as stainless steel (SUS), for example, and is formed in a cylindrical shape with an upper end and a lower end opened. The upper end portion of the manifold 209 is engaged with the lower end portion of the reaction tube 203 and is configured to support the reaction tube 203.
- An O-ring 220a as a seal member is provided between the manifold 209 and the reaction tube 203.
- the reaction tube 203 As the manifold 209 is supported by the heater base, the reaction tube 203 is installed vertically.
- a processing vessel (reaction vessel) is mainly constituted by the reaction tube 203 and the manifold 209.
- a processing chamber 201 is formed in the cylindrical hollow portion of the processing container. The processing chamber 201 is configured to accommodate a plurality of wafers 200 as substrates in a state where they are arranged in multiple stages in a vertical posture in a horizontal posture by a boat 217 described later.
- nozzles 249a to 249c are provided so as to penetrate the manifold 209.
- the nozzles 249a to 249c are made of a heat resistant material such as quartz or SiC.
- Gas supply pipes 232a to 232c are connected to the nozzles 249a to 249c, respectively.
- the reaction tube 203 is provided with the three nozzles 249 a to 249 c and the three gas supply tubes 232 a to 232 c, and can supply a plurality of types of gases into the processing chamber 201. It is configured as follows.
- the gas supply pipes 232a to 232c are provided with mass flow controllers (MFC) 241a to 241c as flow rate controllers (flow rate control units) and valves 243a to 243c as opening / closing valves, respectively, in order from the upstream direction.
- MFC mass flow controllers
- Gas supply pipes 232d to 232f for supplying an inert gas are connected to the gas supply pipes 232a to 232c on the downstream side of the valves 243a to 243c, respectively.
- the gas supply pipes 232d to 232f are provided with MFCs 241d to 241f as flow rate controllers (flow rate control units) and valves 243d to 243f as opening / closing valves, respectively, in order from the upstream direction.
- Nozzles 249a to 249c are connected to the distal ends of the gas supply pipes 232a to 232c, respectively. As shown in FIG. 2, the nozzles 249a to 249c are arranged in an annular space between the inner wall of the reaction tube 203 and the wafer 200, along the upper portion from the lower portion of the inner wall of the reaction tube 203 in the stacking direction of the wafer 200. It is provided to stand up towards each. That is, the nozzles 249a to 249c are provided along the wafer arrangement area in the area horizontally surrounding the wafer arrangement area on the side of the wafer arrangement area where the wafers 200 are arranged.
- Each of the nozzles 249a to 249c is configured as an L-shaped long nozzle, and each horizontal portion thereof is provided so as to penetrate the side wall of the manifold 209, and each vertical portion thereof is at least in the wafer arrangement region. It is provided so as to rise from one end side toward the other end side.
- Gas supply holes 250a to 250c for supplying gas are provided on the side surfaces of the nozzles 249a to 249c, respectively.
- the gas supply holes 250 a to 250 c are each opened so as to face the center of the reaction tube 203, and can supply gas 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, each having the same opening area, and further provided at the same opening pitch.
- the reaction tube 203 is arranged in an annular vertically long space defined by the inner wall of the reaction tube 203 and the ends of the stacked wafers 200, that is, in a cylindrical space. Gas is conveyed via nozzles 249a to 249c. Then, gas is first ejected into the reaction tube 203 from the gas supply holes 250a to 250c opened in the nozzles 249a to 249c, respectively, in the vicinity of the wafer 200.
- the main flow of gas in the reaction tube 203 is a direction parallel to the surface of the wafer 200, that is, a horizontal direction.
- the gas flowing on the surface of the wafer 200 that is, the residual gas after the reaction, flows toward the exhaust port, that is, the direction of the exhaust pipe 231 described later.
- the direction of the remaining gas flow is appropriately specified depending on the position of the exhaust port, and is not limited to the vertical direction.
- a raw material containing a metal element and a halogen element for example, titanium (Ti) as a metal element and a titanium halide raw material gas containing a halogen element are processed through an MFC 241a, a valve 243a, and a nozzle 249a. It is configured to be supplied into the chamber 201.
- the titanium halide raw material gas is a gaseous titanium halide raw material, for example, a gas obtained by vaporizing a titanium halide raw material in a liquid state at normal temperature and normal pressure, or a halogenated gas in a gaseous state at normal temperature and normal pressure.
- the titanium halide raw material is a titanium raw material having a halogen group.
- the halogen group includes chloro group, fluoro group, bromo group, iodo group and the like. That is, the halogen group includes halogen elements such as chlorine (Cl), fluorine (F), bromine (Br), iodine (I) and the like.
- the titanium halide raw material can be said to be a kind of metal halide and a kind of halide.
- raw material when used, it means “a liquid raw material in a liquid state”, “a raw material gas in a gaseous state”, or both. is there.
- titanium halide source gas for example, a source gas containing Ti and Cl, that is, a chlorotitanium source gas can be used.
- chlorotitanium source gas for example, titanium tetrachloride (TiCl 4 ) gas can be used.
- the TiCl 4 gas is an amino group-free gas, that is, a nitrogen (N) -free gas and a carbon (C) -free gas.
- a liquid raw material that is in a liquid state at room temperature and normal pressure such as TiCl 4
- the liquid raw material is vaporized by a vaporization system such as a vaporizer or a bubbler and supplied as a raw material gas (TiCl 4 gas).
- the oxidizing agent is supplied into the processing chamber 201 through the MFC 241b, the valve 243b, and the nozzle 249b.
- an oxygen-containing gas such as water vapor (H 2 O gas) can be used.
- pure water such as RO water from which impurities have been removed using a reverse osmosis membrane, deionized water from which impurities have been removed by applying deionization treatment, or distilled water from which impurities have been removed by distillation using a distiller
- Water or ultrapure water
- a vaporization system such as a vaporizer, bubbler or boiler, and supplied as an oxidizing agent (H 2 O gas).
- the catalyst that promotes the oxidation reaction by the oxidant described above is supplied into the processing chamber 201 through the MFC 241c, the valve 243c, and the nozzle 249c.
- the catalyst for example, an amine-based gas containing C, N, and H can be used.
- the amine-based gas is a gas containing an amine in which at least one of H in ammonia (NH 3 ) is substituted with a hydrocarbon group such as an alkyl group.
- a hydrocarbon group such as an alkyl group.
- an amine containing N having a lone electron pair and having an acid dissociation constant (hereinafter also referred to as pKa) of, for example, about 5 to 11 is suitably used as a catalyst.
- the acid dissociation constant (pKa) is one of the indexes that quantitatively express the strength of the acid, and is an equilibrium constant Ka in the dissociation reaction in which H ions are released from the acid, expressed as a negative common logarithm.
- a cyclic amine-based gas in which a hydrocarbon group is cyclic or a chain amine-based gas in which a hydrocarbon group is chained can be used.
- the cyclic amine-based gas is a heterocyclic compound (heterocyclic compound) having a cyclic structure composed of a plurality of kinds of elements of C and N, that is, a nitrogen-containing heterocyclic compound.
- the amine-based gas that acts as a catalyst can also be referred to as an amine-based catalyst or an amine-based catalyst gas.
- the catalyst illustrated here may decompose
- Such a substance that partially changes before and after a chemical reaction is not strictly a “catalyst”.
- Catalyst Even when a part of the chemical reaction is decomposed in the course of the chemical reaction, most of the substance is not decomposed, and the substance that changes the rate of the reaction and substantially acts as a catalyst, This is referred to as “catalyst”.
- nitrogen (N 2 ) gas as an inert gas passes through the MFCs 241d to 241f, valves 243d to 243f, gas supply pipes 232a to 232c, and nozzles 249a to 249c, respectively. It is configured to be supplied into 201.
- the raw material supply system When flowing the above-mentioned raw material from the gas supply pipe 232a, the raw material supply system is mainly configured by the gas supply pipe 232a, the MFC 241a, and the valve 243a.
- the nozzle 249a may be included in the raw material supply system.
- the raw material supply system can also be referred to as a raw material gas supply system.
- the raw material supply system When flowing a titanium halide raw material from the gas supply pipe 232a, the raw material supply system may be referred to as a titanium halide raw material supply system or a titanium halide raw material gas supply system.
- an oxidant supply system is mainly configured by the gas supply pipe 232b, the MFC 241b, and the valve 243b.
- the nozzle 249b may be included in the oxidant supply system.
- the oxidant supply system can also be referred to as a reaction gas supply system, an oxygen-containing gas supply system, or an oxidant gas supply system.
- a catalyst supply system is mainly configured by the gas supply pipe 232c, the MFC 241c, and the valve 243c.
- the nozzle 249c may be included in the catalyst supply system.
- the catalyst supply system When supplying an amine gas from the gas supply pipe 232c, the catalyst supply system may be referred to as an amine catalyst supply system, an amine gas supply system, or an amine supply system.
- an inert gas supply system is mainly configured by the gas supply pipes 232d to 232f, the MFCs 241d to 241f, and the valves 243d to 243f.
- the inert gas supply system can also be referred to as a purge gas supply system or a carrier gas supply system.
- the reaction tube 203 is provided with an exhaust pipe 231 for exhausting the atmosphere in the processing chamber 201.
- the exhaust pipe 231 is connected to a pressure sensor 245 as a pressure detector (pressure detection unit) for detecting the pressure in the processing chamber 201 and an APC (Auto Pressure Controller) valve 244 as an exhaust valve (pressure adjustment unit).
- a vacuum pump 246 as an evacuation device is connected.
- the APC valve 244 can perform vacuum evacuation and vacuum evacuation stop in the processing chamber 201 by opening and closing the valve with the vacuum pump 246 activated, and further, with the vacuum pump 246 activated,
- the valve is configured such that the pressure in the processing chamber 201 can be adjusted by adjusting the valve opening based on the pressure information detected by the pressure sensor 245.
- An exhaust system is mainly configured by the exhaust pipe 231, the APC valve 244, and the pressure sensor 245.
- the vacuum pump 246 may be included in the exhaust system.
- the exhaust pipe 231 is not limited to being provided in the reaction pipe 203, and may be provided in the manifold 209 in the same manner as the nozzles 249a to 249c.
- a seal cap 219 is provided as a furnace opening lid capable of airtightly closing the lower end opening of the manifold 209.
- the seal cap 219 is configured to contact 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 is provided as a seal member that comes into contact with the lower end of the manifold 209.
- a rotation mechanism 267 for rotating a boat 217 described later is installed on the opposite side of the seal cap 219 from the processing chamber 201.
- a rotation shaft 255 of the rotation mechanism 267 passes through 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 lifted and lowered in the vertical direction by a boat elevator 115 as a lifting mechanism vertically installed outside the reaction 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 moving the seal cap 219 up and down.
- the boat elevator 115 is configured as a transfer device (transfer mechanism) that transfers the boat 217 and the wafer 200 supported by the boat 217 into and out of the processing chamber 201.
- the boat 217 as the substrate support is configured to support a plurality of, for example, 25 to 200 wafers 200 in a horizontal posture and in a multi-stage by aligning them in the vertical direction with their centers aligned. Are arranged so as to be spaced apart.
- the boat 217 is made of a heat-resistant material such as quartz or SiC.
- heat insulating plates 218 made of a heat-resistant material such as quartz or SiC are supported in multiple stages in a horizontal posture. With this configuration, heat from the heater 207 is not easily transmitted to the seal cap 219 side.
- this embodiment is not limited to the above-mentioned form.
- a heat insulating cylinder configured as a cylindrical member made of a heat resistant material such as quartz or SiC may be provided.
- a temperature sensor 263 is installed as a temperature detector. By adjusting the power supply to the heater 207 based on the temperature information detected by the temperature sensor 263, the temperature in the processing chamber 201 has a desired temperature distribution.
- the temperature sensor 263 is configured in an L shape similarly to the nozzles 249a to 249c, and 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 having 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 to exchange data with the CPU 121a via the internal bus 121e.
- an input / output device 122 configured as a touch panel or the like is connected to the controller 121.
- the storage device 121c includes, for example, a flash memory, a HDD (Hard Disk Drive), and the like.
- a control program that controls the operation of the substrate processing apparatus, a process recipe that describes the procedure and conditions of the substrate processing described later, and the like are stored in a readable manner.
- the process recipe is a combination of the controller 121 that allows the controller 121 to execute each procedure in the substrate processing process described later and obtain a predetermined result, and functions as a program.
- the process recipe, the control program, and the like are collectively referred to simply as a program.
- program When the term “program” is used in this specification, it may include only a process recipe alone, only a control program alone, or both.
- 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 stored.
- the I / O port 121d is connected to the above-described MFCs 241a to 241f, valves 243a to 243f, pressure sensor 245, APC valve 244, vacuum pump 246, heater 207, temperature sensor 263, rotation mechanism 267, boat elevator 115, and the like. .
- the CPU 121a is configured to read and execute a control program from the storage device 121c, and to read a process recipe from the storage device 121c in response to an operation command input from the input / output device 122 or the like.
- the CPU 121a adjusts the flow rates of various gases by the MFCs 241a to 241f, the opening and closing operations of the valves 243a to 243f, the opening and closing operations of the APC valve 244, and the pressure by the APC valve 244 based on the pressure sensor 245 so as to match the contents of the read process recipe.
- Adjusting operation, starting and stopping of the vacuum pump 246, temperature adjusting operation of the heater 207 based on the temperature sensor 263, rotation and rotation speed adjusting operation of the boat 217 by the rotating mechanism 267, lifting and lowering operation of the boat 217 by the boat elevator 115, and the like are controlled. It is configured as follows.
- the controller 121 is not limited to being configured as a dedicated computer, and may be configured as a general-purpose computer.
- an external storage device storing the above-described program for example, magnetic tape, magnetic disk such as a 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
- the controller 121 of this embodiment can be configured by installing a program in a general-purpose computer using the external storage device 123.
- the means for supplying the program to the computer is not limited to supplying the program via the external storage device 123.
- the program may be supplied without using the external storage device 123 by using communication means such as the Internet or a dedicated line.
- the storage device 121c and the external storage device 123 are configured as computer-readable recording media. Hereinafter, these are collectively referred to simply as a recording medium.
- recording medium When the term “recording medium” is used in this specification, it may include only the storage device 121c alone, may include only the external storage device 123 alone, or may include both.
- TiCl 4 gas as a raw material containing a metal element and a halogen group to a wafer 200 as a substrate
- H 2 O gas as an oxidant to the wafer 200
- TiO 2 film hereinafter also referred to as a TiO film
- step of supplying the H 2 O gas as a catalyst and supplying a pyridine gas with the H 2 O gas to the wafer 200 in the step of supplying TiCl 4 gas, non pyridine gas to the wafer 200 Supply.
- performing the cycle a predetermined number of times means performing the cycle once or a plurality of times. That is, the cycle is performed once or more.
- FIG. 4 shows an example in which the above cycle is repeated n times.
- wafer when the term “wafer” is used in this specification, it means “wafer itself” or “a laminate (aggregate) of a wafer and a predetermined layer or film formed on the surface thereof”. ", That is, a predetermined layer or film formed on the surface may be referred to as a wafer.
- wafer surface when the term “wafer surface” is used in this specification, it means “the surface of the wafer itself (exposed surface)” or “the surface of a predetermined layer or film formed on the wafer”. That is, it may mean “the outermost surface of the wafer as a laminated body”.
- the phrase “supplying a predetermined gas to the wafer” means “supplying a predetermined gas directly to the surface (exposed surface) of the wafer itself”. , It may mean that “a predetermined gas is supplied to a layer, a film, or the like formed on the wafer, that is, to the outermost surface of the wafer as a laminated body”. Further, in this specification, when “describe a predetermined layer (or film) on the wafer” is described, “determine a predetermined layer (or film) directly on the surface (exposed surface) of the wafer itself”. This means that a predetermined layer (or film) is formed on a layer or film formed on the wafer, that is, on the outermost surface of the wafer as a laminate. There is a case.
- Vacuum exhaust (reduced pressure) is performed by the vacuum pump 246 so that the processing chamber 201, that is, the space where the wafer 200 exists, has a desired pressure (degree of vacuum).
- 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.
- the vacuum pump 246 maintains a state in which it is always operated until at least the processing on the wafer 200 is completed. Further, the wafer 200 in the processing chamber 201 is heated by the heater 207 so as to have a desired film formation temperature.
- the power supply 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. Heating of the processing chamber 201 by the heater 207 is continuously performed at least until the processing on the wafer 200 is completed. Further, the rotation of the boat 217 and the wafers 200 by the rotation mechanism 267 is started. 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.
- steps 1 and 2 are sequentially executed.
- Step 1 TiCl 4 gas supply
- the valve 243a is opened and TiCl 4 gas is allowed to flow into the gas supply pipe 232a.
- the flow rate of the TiCl 4 gas is adjusted by the MFC 241a, supplied into the processing chamber 201 from the gas supply hole 250a, and exhausted from the exhaust pipe 231.
- TiCl 4 gas is supplied to the wafer 200.
- the valve 243d is opened and N 2 gas is allowed to flow into the gas supply pipe 232d.
- the flow rate of the N 2 gas is adjusted by the MFC 241d, supplied together with the TiCl 4 gas into the processing chamber 201, and exhausted from the exhaust pipe 231.
- the valves 243e and 243f are opened, and N 2 gas is caused to flow into the gas supply pipes 232e and 232f.
- the N 2 gas is supplied into the processing chamber 201 through the gas supply pipes 232b and 232c and the nozzles 249b and 249c, and is exhausted from the exhaust pipe 231.
- the supply flow rate of TiCl 4 gas controlled by the MFC 241a is, for example, 10 to 2000 sccm, preferably 10 to 1000 sccm.
- the supply flow rate of the N 2 gas controlled by the MFCs 241d to 241f is, for example, a flow rate in the range of 100 to 10,000 sccm.
- the time for supplying the TiCl 4 gas to the wafer 200, that is, the gas supply time (irradiation time) is, for example, 1 to 30 seconds, preferably 1 to 20 seconds, more preferably 1 to 10 seconds. To do. Note that if the supply time of the TiCl 4 gas is too long, the film thickness of the formed film may become unstable.
- the supply time of the TiCl 4 gas 30 seconds or less, preferably 20 seconds or less, more preferably 10 seconds or less, this can be alleviated and eliminated.
- the supply time of TiCl 4 gas is preferably equal to or shorter than the supply time of H 2 O gas described later.
- the APC valve 244 is appropriately adjusted so that the pressure in the processing chamber 201 is, for example, 30 to 400 Pa, preferably 30 to 133 Pa.
- an excessive gas phase reaction CVD reaction
- CVD reaction an excessive gas phase reaction
- the uniformity of the thickness of the first layer described later that is, the TiO film finally formed
- the film thickness uniformity tends to deteriorate, and the control becomes difficult. Further, particles are easily generated in the processing chamber 201, and the film quality of the TiO film is easily deteriorated.
- an excessive gas phase reaction in the processing chamber 201 can be sufficiently suppressed.
- an excessive gas phase reaction in the processing chamber 201 can be more sufficiently suppressed.
- the temperature of the heater 207 is such that the temperature of the wafer 200 becomes, for example, a temperature in the range of room temperature to 300 ° C., preferably room temperature to 200 ° C., more preferably room temperature to 100 ° C. Set to.
- the formation rate of the first layer that is, the deposition rate of the TiO film finally formed can be improved. Further, by setting the temperature of the wafer 200 to room temperature or higher, the amount of Cl remaining in the first layer can be reduced, and the film quality of the TiO film can be improved.
- the first layer formed on the wafer 200 is crystallized, and the surface roughness of the first layer, that is, the surface roughness of the TiO film tends to deteriorate. Further, TiCl 4 adsorbed on the wafer 200 is likely to be desorbed, and the formation rate of the first layer, that is, the deposition rate of the TiO film is likely to decrease.
- Surface roughness means a height difference in the wafer surface or in an arbitrary target surface, and has the same meaning as the surface roughness. The improvement in surface roughness (good) means that the difference in height is reduced (small), that is, the surface is smooth (smooth). Deteriorating (poor) surface roughness means that this height difference becomes large (large), that is, the surface becomes rough (rough).
- the crystallization of the first layer can be suppressed, and the surface roughness of the first layer, that is, the surface roughness of the TiO film can be improved.
- desorption of TiCl 4 adsorbed on the wafer 200 can be suppressed, and the film formation rate of the TiO film can be increased.
- the amount of heat applied to the wafer 200 can be reduced, and the heat history received by the wafer 200 can be favorably controlled.
- the temperature of the wafer 200 By setting the temperature of the wafer 200 to 200 ° C. or lower, further 100 ° C. or lower, crystallization of the first layer can be more reliably suppressed, and the surface roughness of the first layer, that is, the surface of the TiO film The roughness can be further improved. Further, the desorption of TiCl 4 adsorbed on the wafer 200 can be further suppressed, and the deposition rate of the TiO film can be further increased. In addition, the amount of heat applied to the wafer 200 can be further reduced, and the thermal history received by the wafer 200 can be controlled more satisfactorily.
- the temperature of the wafer 200 should be a temperature in the range of room temperature to 300 ° C., preferably room temperature to 200 ° C., more preferably room temperature to 100 ° C.
- the first layer has a thickness of, for example, less than one atomic layer to several atomic layers on the wafer 200 (underlayer film on the surface).
- a Ti-containing layer containing Cl is formed.
- the Ti-containing layer containing Cl may be a Ti layer containing Cl, an adsorption layer of TiCl 4 , or both.
- the Ti layer containing Cl is a general term including a continuous layer made of Ti and containing Cl, a discontinuous layer, and a Ti thin film containing Cl formed by overlapping these layers.
- a continuous layer made of Ti and containing Cl may be referred to as a Ti thin film containing Cl.
- Ti constituting the Ti layer containing Cl includes not only the bond with Cl not completely broken but also the one with bond completely broken with Cl.
- Adsorption layer of TiCl 4 in addition to a continuous adsorption layer of TiCl 4, also includes a discontinuous adsorption layer. That is, the adsorption layer of TiCl 4 includes an adsorption layer thickness of less than one molecular layer or one molecular layer composed of TiCl 4 molecule. TiCl 4 molecules constituting the TiCl 4 adsorption layer include those in which the bond between Ti and Cl is partially broken. That is, the TiCl 4 adsorption layer includes a TiCl 4 chemical adsorption layer. Incidentally, the adsorption layer of TiCl 4 may include the physical adsorption layer of TiCl 4.
- a layer having a thickness of less than one atomic layer means an atomic layer formed discontinuously, and a layer having a thickness of one atomic layer means an atomic layer formed continuously.
- a layer having a thickness of less than one molecular layer means a molecular layer formed discontinuously, and a layer having a thickness of one molecular layer means a molecular layer formed continuously.
- the Ti-containing layer containing Cl may include both a Ti layer containing Cl and an adsorption layer of TiCl 4 . However, as described above, the Ti-containing layer containing Cl is expressed using expressions such as “one atomic layer” and “several atomic layer”.
- TiCl 4 gas is self-decomposed (thermally decomposed), that is, under a condition where a thermal decomposition reaction of the TiCl 4 gas occurs, a Ti layer containing Cl is formed by depositing Ti on the wafer 200.
- the first layer is a layer containing a large amount of Ti layer containing Cl or a layer containing a large amount of TiCl 4 chemical adsorption layer, and is a layer containing almost no physical adsorption layer of TiCl 4 .
- forming a Ti layer containing Cl or a chemical adsorption layer of TiCl 4 on the wafer 200 can increase the film formation rate. preferable.
- the action of modification in Step 2 described later does not reach the entire first layer.
- the minimum thickness of the first layer that can be formed on the wafer 200 is less than one atomic layer. Accordingly, it is preferable that the thickness of the first layer be less than one atomic layer to several atomic layers.
- the action of the reforming reaction in Step 2 described later can be relatively enhanced.
- the time required for the reforming reaction can be shortened.
- the time required for forming the first layer in Step 1 can also be shortened. As a result, the processing time per cycle can be shortened, and the total processing time can be shortened. That is, the film forming rate can be increased. Further, by controlling the thickness of the first layer to 1 atomic layer or less, it becomes possible to improve the controllability of film thickness uniformity.
- the valve 243a is closed and the supply of TiCl 4 gas is stopped.
- the APC valve 244 is kept open, the processing chamber 201 is evacuated by the vacuum pump 246, and TiCl 4 gas remaining in the processing chamber 201 or contributing to the formation of the first layer is removed. Excluded from the processing chamber 201.
- the valves 243d to 243f are kept open and the supply of N 2 gas into the processing chamber 201 is maintained.
- the N 2 gas acts as a purge gas, which can enhance the effect of removing the gas remaining in the processing chamber 201 from the processing chamber 201.
- the supply flow rate of N 2 gas controlled by the MFCs 241d to 241f is the same as that in Step 1.
- the time for purging the inside of the processing chamber 201 with N 2 gas is, for example, 1 to 120 seconds, preferably 1 to 80 seconds, more preferably 1 to 60 seconds.
- the gas remaining in the processing chamber 201 may not be completely removed, and the inside of the processing chamber 201 may not be completely purged. If the amount of gas remaining in the processing chamber 201 is very small, there will be no adverse effect in the subsequent step 2.
- the flow rate of the N 2 gas supplied into the processing chamber 201 does not need to be a large flow rate. For example, by supplying an amount of N 2 gas equivalent to the volume of the reaction tube 203 (processing chamber 201), step 2 is performed. Purging can be performed to such an extent that no adverse effect is caused. Thus, by not completely purging the inside of the processing chamber 201, the purge time can be shortened and the throughput can be improved. It is also possible to minimize the consumption of N 2 gas.
- a source gas containing Ti and a fluoro group such as titanium tetrafluoride (TiF 4 ) can be used.
- a source gas containing Ti and a fluoro group such as titanium tetrafluoride (TiF 4 )
- TiF 4 titanium tetrafluoride
- the inert gas for example, a rare gas such as Ar gas, He gas, Ne gas, or Xe gas can be used in addition to N 2 gas.
- Step 2 H 2 O gas and pyridine gas supply
- the opening / closing control of the valves 243b, 243c, 243d to 243f is performed in the same procedure as the opening / closing control of the valves 243a, 243d to 243f in Step 1.
- the supply flow rate of the H 2 O gas controlled by the MFC 241b is, for example, a flow rate in the range of 100 to 1000 sccm.
- the supply flow rate of pyridine gas controlled by the MFC 241c is, for example, a flow rate in the range of 100 to 1000 sccm.
- the H 2 O gas and the pyridine gas are supplied into the processing chamber 201 from different nozzles 249b and 249c, respectively, and after being supplied into the processing chamber 201, they are mixed (Post-mix).
- the supply flow rate of N 2 gas controlled by the MFCs 241d to 241f is the same as that in Step 1.
- the pressure in the processing chamber 201 is, for example, 30 to 400 Pa, preferably 30 to 133 Pa.
- the partial pressure of the H 2 O gas in the processing chamber 201 is, for example, a pressure in the range of 0.1 to 300 Pa.
- the partial pressure of pyridine gas in the processing chamber 201 is, for example, a pressure in the range of 0.1 to 300 Pa.
- the time for supplying the H 2 O gas to the wafer 200 is, for example, 1 to 120 seconds, preferably 1 to 80 seconds, more preferably 1 to 60 seconds.
- the other processing conditions are, for example, the same processing conditions as in Step 1.
- the first layer Ti-containing layer containing Cl
- a second layer containing Ti and O that is, a titanium oxide layer (TiO 2 layer, hereinafter also referred to as a TiO layer) is formed on the wafer 200.
- impurities such as Cl contained in the first layer constitute a gaseous substance containing at least Cl in the process of reforming reaction with H 2 O gas, and the processing chamber 201 It is discharged from the inside. That is, impurities such as Cl in the first layer are separated from the first layer by being extracted from or desorbed from the first layer. Accordingly, the second layer is a layer having less impurities such as Cl than the first layer.
- the pyridine gas acts on the O—H bond of the H 2 O gas and weakens the bonding force between O—H.
- a gaseous substance containing Cl and H such as HCl is generated by the reaction between H, whose bonding strength is weakened by the action of pyridine gas, and Cl in the first layer formed on the wafer 200.
- H is separated from the H 2 O molecules, and Cl is desorbed from the first layer.
- O in the H 2 O gas that has lost H is bonded to Ti or the like in the first layer that has dangling bonds due to the elimination of Cl.
- N having a lone electron pair in the pyridine molecule acts to attract H.
- the above-mentioned acid dissociation constant (pKa) can be used as an index for the magnitude of the action of a predetermined compound containing N or the like to attract H.
- pKa is a constant expressed by a negative common logarithm in the dissociation reaction in which H ions are released from an acid, and a compound having a large pKa has a stronger ability to attract H.
- the bonding force of the O—H bond of the H 2 O gas can be appropriately weakened, and the above-described oxidation reaction can be promoted.
- Cl extracted from the first layer is combined with the catalyst to form a salt (Salt: ionic compound) such as ammonium chloride (NH 4 Cl), It may be a particle source.
- the pKa of the catalyst is, for example, about 11 or less, preferably 7 or less.
- Pyridine gas has a relatively large pKa of about 5.67 and has a strong ability to attract H. Further, since pKa is 7 or less, particles are hardly generated.
- gas containing O and H gas containing O—H bond
- gas containing O—H bond such as hydrogen peroxide (H 2 O 2 ) gas, hydrogen (H 2 ) gas + oxygen (O 2 ) gas, H 2 gas + ozone (O 3 ) gas, or the like
- the catalyst gas for example, the above-mentioned various amine-based gases and non-amine-based gases can be used in addition to the pyridine gas.
- the inert gas for example, the above-described various rare gases can be used in addition to the N 2 gas.
- a TiO film having a predetermined composition and a predetermined thickness can be formed on the wafer 200 by performing the above-described steps 1 and 2 non-simultaneously at least once (predetermined number of times).
- the above cycle is preferably repeated multiple times. That is, it is preferable that the thickness of the TiO layer formed per cycle is made smaller than the desired film thickness, and the above-described cycle is repeated a plurality of times until the desired film thickness is obtained.
- the thickness of the TiO layer formed per cycle is 0.1 to 1 nm, and the above cycle is repeated a plurality of times until the thickness of the TiO film reaches a desired thickness, for example, 10 to 20 nm. preferable.
- the portion described as “supplying a predetermined gas to the wafer 200” is “to the layer formed on the wafer 200, That is, it means that a predetermined gas is supplied to the outermost surface of the wafer 200 as a laminated body, and a portion described as “form a predetermined layer on the wafer 200” is “formed on the wafer 200”. It means that a predetermined layer is formed on the applied layer, that is, on the outermost surface of the wafer 200 as a laminate. This point is as described above. This is the same in the modified examples and other embodiments described later.
- N 2 gas acts as a purge gas.
- the inside of the processing chamber 201 is purged, and the gas and reaction by-products remaining in the processing chamber 201 are removed from the processing chamber 201 (purge).
- the atmosphere in the processing chamber 201 is replaced with an inert gas (inert gas replacement), and the pressure in the processing chamber 201 is returned to normal pressure (return to atmospheric pressure).
- step (a) 2 by supplying the pyridine gas with the H 2 O gas, encourage the decomposition of the H 2 O gas, it is possible to improve the oxidizing power of the H 2 O gas. Accordingly, for example, even under a low temperature condition of room temperature or higher and 300 ° C. or lower, the first layer and the H 2 O gas can be efficiently reacted to increase the reforming rate of the first layer. That is, the catalytic action of pyridine gas can lower the temperature of forming the TiO film, increase the film forming rate of the TiO film, and improve the productivity of the film forming process.
- Step 2 by supplying pyridine gas together with H 2 O gas and enhancing the oxidizing power of H 2 O gas, it is possible to promote desorption of Cl from the first layer.
- the TiO film can be a film with less impurities such as Cl. That is, the film quality of the TiO film can be improved.
- step 1 by not supplying pyridine gas, it is possible to improve the film quality of the TiO film. Because the feeding catalyst such as pyridine gas in supplying TiCl 4 gas, a reaction of the TiCl 4 gas and the catalyst, tends to occur excessive gas phase reaction. When the inventors supply a catalyst such as pyridine gas together with TiCl 4 gas, reaction by-products such as pyridine salts generated by an excessive gas phase reaction are taken into the film as powdery foreign substances. It has been confirmed that the formation of a TiO film may be difficult due to the fact that it is attached to the film. That is, it has been confirmed that when TiCl 4 gas and pyridine gas are supplied simultaneously, the pyridine gas may not function as a catalyst in this reaction system.
- the TiO film can be made into a film with less impurities such as C and N.
- a raw material gas containing Ti and an amino group such as tetrakis (dimethylamino) titanium (Ti [N (CH 3 ) 2 ] 4 , abbreviation: TDMAT) gas, that is, N and C are used.
- TDMAT tetrakis (dimethylamino) titanium
- the finally formed TiO film can be a film having a low impurity concentration such as C or N.
- the TiO film can be made, for example, a highly insulating film, that is, a film having high leak resistance.
- the first gas can be obtained even under a low temperature condition of, for example, room temperature to 300 ° C.
- This layer can be formed efficiently, and the deposition rate of the TiO film can be increased. Further, the consumption of TiCl 4 gas that does not contribute to film formation can be reduced, and the film formation cost can be reduced.
- Step 2 the supply of pyridine gas may be stopped before the supply of H 2 O gas.
- the processing procedure and processing conditions in this modification are the same as those in the film forming sequence shown in FIG. 4 except for the points described above.
- the pyridine gas may be supplied only at the beginning of the H 2 O gas supply period.
- the processing procedure and processing conditions in this modification are the same as those in the film forming sequence shown in FIG. 4 except for the points described above.
- the supply of pyridine gas may be intermittently performed a plurality of times during the supply period of H 2 O gas.
- the processing procedure and processing conditions in this modification are the same as those in the film forming sequence shown in FIG. 4 except for the points described above.
- FIG. 7 shows an example in which pyridine gas is supplied three times intermittently during the supply period of H 2 O gas.
- step 2 the supply of H 2 O gas may be stopped before the supply of pyridine gas.
- the processing procedure and processing conditions in this modification are the same as those in the film forming sequence shown in FIG. 4 except for the points described above.
- the H 2 O gas may be supplied only at the beginning of the pyridine gas supply period.
- the processing procedure and processing conditions in this modification are the same as those in the film forming sequence shown in FIG. 4 except for the points described above.
- the H 2 O gas may be supplied intermittently a plurality of times during the pyridine gas supply period.
- the processing procedure and processing conditions in this modification are the same as those in the film forming sequence shown in FIG. 4 except for the points described above.
- FIG. 10 shows an example in which H 2 O gas is supplied three times intermittently during the supply period of pyridine gas.
- the present invention is not limited to such a form, and a TiO x film having a composition ratio different from that of the stoichiometric composition can be formed.
- a Ti-rich (O poor) TiO x film rather than a TiO 2 film having a stoichiometric composition.
- the oxidation reaction in Step 2 is suppressed. It can be saturated. Note that according to the methods of the first to third modifications, the oxidation reaction in step 2 can be easily made unsaturated.
- the example in which the oxidizing agent and the catalyst are supplied after the raw materials are supplied has been described.
- the present invention is not limited to such a form, and the supply order of the raw material, the oxidizing agent, and the catalyst may be reversed. That is, after supplying an oxidizing agent and a catalyst, you may make it supply a raw material. By changing the supply order of the raw material, the oxidizing agent, and the catalyst, the film quality and composition ratio of the formed metal oxide film can be changed.
- transition metal elements such as zirconium (Zr), hafnium (Hf), tantalum (Ta), niobium (Nb), molybdenum (Mo), tungsten (W),
- Zr zirconium
- Hafnium hafnium
- Ta tantalum
- Nb niobium
- Mo molybdenum
- W tungsten
- the present invention can also be suitably applied when forming a metal-based oxide film containing a typical metal element such as aluminum (Al).
- the present invention can be suitably applied to, for example, forming a metal oxide film such as a ZrO film, an HfO film, a TaO film, an NbO film, a MoO film, a WO film, or an AlO film.
- a metal oxide film such as a ZrO film, an HfO film, a TaO film, an NbO film, a MoO film, a WO film, or an AlO film.
- a raw material containing a metal element such as Zr, Hf, Ta, Nb, Mo, W, or Al is used as the raw material.
- Film formation can be performed by a similar sequence.
- a raw material containing Zr and a halogen element can be used as a raw material containing Zr.
- a raw material containing Zr and a halogen element for example, a raw material containing Zr and a chloro group such as zirconium tetrachloride (ZrCl 4 ) or a raw material containing Zr and a fluoro group such as zirconium tetrafluoride (ZrF 4 ) is used.
- ZrCl 4 zirconium tetrachloride
- ZrF 4 zirconium tetrafluoride
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same processing conditions as in the above-described embodiment, for example.
- a raw material containing Hf and a halogen element can be used as the raw material containing Hf.
- the raw material containing Hf and a halogen element for example, using a raw material containing or material containing Hf and chloro group such as hafnium tetrachloride (HfCl 4), the Hf and fluoro groups hafnium tetrafluoride (HfF 4), etc. Can do.
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same processing conditions as in the above-described embodiment, for example.
- a raw material containing Ta and a halogen element can be used as a raw material containing Ta.
- a raw material containing Ta and a halogen element for example, a raw material containing Ta and a chloro group such as tantalum pentachloride (TaCl 5 ) or a raw material containing Ta and a fluoro group such as tantalum pentafluoride (TaF 5 ) is used.
- a raw material containing Ta and a halogen element for example, a raw material containing Ta and a chloro group such as tantalum pentachloride (TaCl 5 ) or a raw material containing Ta and a fluoro group such as tantalum pentafluoride (TaF 5 ) is used.
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same processing conditions as in the above-described embodiment, for example.
- a raw material containing Nb and a halogen element can be used as the raw material containing Nb.
- a raw material containing Nb and a halogen element for example, a raw material containing Nb and a chloro group such as niobium pentachloride (NbCl 5 ) or a raw material containing Nb and a fluoro group such as niobium pentafluoride (NbF 5 ) is used.
- a raw material containing Nb and a halogen element for example, a raw material containing Nb and a chloro group such as niobium pentachloride (NbCl 5 ) or a raw material containing Nb and a fluoro group such as niobium pentafluoride (NbF 5 ) is used.
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same
- a raw material containing Mo and a halogen element can be used as the raw material containing Mo.
- a raw material containing Mo and a halogen element for example, a raw material containing Mo and a chloro group such as molybdenum pentachloride (MoCl 5 ) or a raw material containing Mo and a fluoro group such as molybdenum pentafluoride (MoF 5 ) is used.
- MoCl 5 molybdenum pentachloride
- MoF 5 molybdenum pentafluoride
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same processing conditions as in the above-described embodiment, for example.
- a raw material containing W and a halogen element can be used as a raw material containing W.
- a raw material containing W and a halogen element for example, a raw material containing W and a chloro group such as tungsten hexachloride (WCl 6 ) or a raw material containing W and a fluoro group such as tungsten hexafluoride (WF 6 ) is used.
- WF 6 tungsten hexafluoride
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same processing conditions as in the above-described embodiment, for example.
- a raw material gas containing Al and a halogen element can be used as a raw material containing Al.
- a raw material containing Al and a halogen element for example, a raw material containing Al and a chloro group such as aluminum trichloride (AlCl 3 ) or a raw material containing Al and a fluoro group such as aluminum trifluoride (AlF 3 ) is used. it can.
- the oxidant and catalyst the same oxidant and catalyst as in the above-described embodiment can be used.
- the processing conditions at this time can be set to the same processing conditions as in the above-described embodiment, for example.
- the present invention can be applied not only to the formation of TiO films but also the formation of oxide films containing transition metal elements other than Ti and oxide films containing typical metal elements. Even in this case, the same effect as the above-described embodiment can be obtained.
- the process recipes (programs describing the processing procedures and processing conditions of the film forming process) used for the film forming process of these various thin films are the contents of the film forming process (film type, composition ratio, film quality, It is preferable to prepare (multiple prepare) individually according to the film thickness, gas supply pattern, film forming temperature, processing conditions such as pressure in the processing chamber, and the like. And when starting a substrate processing, it is preferable to select a suitable recipe suitably from several recipes according to the content of a substrate processing. Specifically, a storage device included in the substrate processing apparatus stores a plurality of recipes individually prepared according to the contents of the substrate processing via an electric communication line or a recording medium (external storage device 123) that records the recipe.
- the CPU 121a included in the substrate processing apparatus may appropriately select an appropriate recipe from a plurality of recipes stored in the storage device 121c according to the content of the substrate processing. preferable.
- the CPU 121a included in the substrate processing apparatus may appropriately select an appropriate recipe from a plurality of recipes stored in the storage device 121c according to the content of the substrate processing.
- the operation burden on the operator such as an input burden on the processing procedure and processing conditions
- to quickly start the substrate processing while avoiding an operation error may be reduced.
- the above-described process recipe is not limited to a case of newly creating, and may be prepared by changing an existing recipe that has already been installed in the substrate processing apparatus, for example.
- the changed recipe may be installed in the substrate processing apparatus via an electric communication line or a recording medium on which the recipe is recorded.
- an existing recipe that has already been installed in the substrate processing apparatus may be directly changed by operating the input / output device 122 provided in the existing substrate processing apparatus.
- the present invention is not limited to the above-described embodiment, and can be suitably applied to the case where a thin film is formed using, for example, a single-wafer type substrate processing apparatus that processes one or several substrates at a time.
- a thin film is formed using a substrate processing apparatus having a hot wall type processing furnace.
- the present invention is not limited to the above-described embodiment, and can also be suitably applied to the case where a thin film is formed using a substrate processing apparatus having a cold wall type processing furnace.
- the processing procedure and processing conditions can be the same processing procedure and processing conditions as in the above-described embodiment, for example.
- the processing furnace 302 includes a processing vessel 303 that forms the processing chamber 301, a shower head 303s that supplies gas into the processing chamber 301 in a shower shape, and a support base 317 that supports one or several wafers 200 in a horizontal posture. And a rotating shaft 355 that supports the support base 317 from below, and a heater 307 provided on the support base 317.
- a gas supply port 332a for supplying the above-mentioned raw material
- a gas supply port 332b for supplying the above-mentioned oxidizing agent
- a gas supply port 332c for supplying the above-mentioned catalyst
- a raw material supply system similar to the raw material supply system of the above-described embodiment is connected to the gas supply port 332a.
- An oxidant supply system similar to the oxidant supply system of the above-described embodiment is connected to the gas supply port 332b.
- a catalyst supply system similar to the catalyst supply system of the above-described embodiment is connected to the gas supply port 332c.
- a gas dispersion plate that supplies gas into the processing chamber 301 in a shower shape is provided at the outlet (gas outlet) of the shower head 303s.
- the shower head 303s separately supplies the oxidizing agent and the catalyst simultaneously introduced from the gas supply ports 332b and 332c into the processing chamber 301 without being mixed (Pre-mix) in the shower head 303s. It is preferable to be configured to be mixed (Post-mix).
- the processing vessel 303 is provided with an exhaust port 331 for exhausting the inside of the processing chamber 301.
- An exhaust system similar to the exhaust system of the above-described embodiment is connected to the exhaust port 331.
- the processing furnace 402 includes a processing container 403 that forms a processing chamber 401, a support base 417 that supports one or several wafers 200 in a horizontal position, a rotating shaft 455 that supports the support base 417 from below, and a processing container.
- a lamp heater 407 that irradiates light toward the wafer 200 in the 403 and a quartz window 403w that transmits light from the lamp heater 407 are provided.
- the processing vessel 403 is connected to a gas supply port 432a for supplying the above-described raw material, a gas supply port 432b for supplying the above-mentioned oxidizing agent, and a gas supply port 432c for supplying the above-mentioned catalyst.
- a raw material supply system similar to the raw material supply system of the above-described embodiment is connected to the gas supply port 432a.
- An oxidant supply system similar to the oxidant supply system of the above-described embodiment is connected to the gas supply port 432b.
- a catalyst supply system similar to the catalyst supply system of the above-described embodiment is connected to the gas supply port 432c.
- the processing container 403 is provided with an exhaust port 431 for exhausting the inside of the processing chamber 401.
- An exhaust system similar to the exhaust system of the above-described embodiment is connected to the exhaust port 431.
- the film forming process can be performed in the same sequence and processing conditions as those of the above-described embodiment and modification.
- processing conditions at this time can be the same processing conditions as in the above-described embodiment, for example.
- a TiO film was formed by the film forming sequence shown in FIG. That is, in the step of supplying the oxidizing agent, the catalyst is supplied to the wafer together with the oxidizing agent, and in the step of supplying the raw material, the catalyst is not supplied to the wafer.
- TiCl 4 gas was used as a raw material
- H 2 O gas was used as an oxidizing agent
- pyridine gas was used as a catalyst.
- the processing conditions were set within the processing condition range described in the above embodiment.
- the TiO film was formed by the film forming sequence shown in FIG. 11 using the substrate processing apparatus in the above-described embodiment. That is, the catalyst was supplied to the wafer in both the step of supplying the oxidizing agent and the step of supplying the raw material.
- TiCl 4 gas was used as a raw material
- H 2 O gas was used as an oxidizing agent
- pyridine gas was used as a catalyst.
- the processing conditions were set within the processing condition range described in the above embodiment.
- the TiO film was formed by the film forming sequence shown in FIG. That is, in the step of supplying the oxidizing agent, the catalyst was not supplied to the wafer, and in the step of supplying the raw material, the catalyst was supplied together with the raw material to the wafer.
- TiCl 4 gas was used as a raw material
- H 2 O gas was used as an oxidizing agent
- pyridine gas was used as a catalyst.
- the processing conditions were set within the processing condition range described in the above embodiment.
- a TiO film was formed by the film forming sequence shown in FIG. That is, the catalyst was not supplied to the wafer in both the step of supplying the oxidizing agent and the step of supplying the raw material.
- TiCl 4 gas was used as a raw material
- H 2 O gas was used as an oxidizing agent.
- the processing conditions were set within the processing condition range described in the above embodiment.
- FIG. 14A shows a part of the evaluation result of the deposition rate of the TiO film.
- the vertical axis represents the deposition rate ( ⁇ / min) of the TiO film, and the horizontal axis represents Comparative Example 3 and Example in this order.
- FIG. 14B is a diagram collectively showing the deposition rate of the TiO film and the evaluation result of visual confirmation.
- the film formation rate (4.57 ⁇ / min) of the example is about five times the film formation rate (0.95 ⁇ / min) of Comparative Example 3.
- Comparative Examples 1 and 2 an excessive gas phase reaction between TiCl 4 gas and pyridine gas occurs, and an appropriate TiO film cannot be formed, and the film formation rate is measured. I could't.
- powdery foreign matters generated by an excessive gas phase reaction are taken in so that they can be visually confirmed.
- (Appendix 1) Supplying a raw material containing a metal element and a halogen group (halogen element) to the substrate; Supplying an oxidizing agent to the substrate; Performing a non-simultaneous cycle a predetermined number of times to form an oxide film containing the metal element on the substrate,
- a catalyst is supplied to the substrate together with the oxidizing agent,
- a semiconductor device manufacturing method and a substrate processing method in which the catalyst is not supplied to the substrate are provided.
- Appendix 2 The method according to appendix 1, preferably, The raw material is free of nitrogen.
- Appendix 3 The method according to appendix 1 or 2, preferably, The raw material is free of carbon.
- Appendix 4 The method according to any one of appendices 1 to 3, preferably, The raw material is free of nitrogen and carbon.
- the halogen group includes a chloro group, a fluoro group, a bromo group, or an iodo group.
- the halogen group includes a chloro group.
- the metal element includes a transition metal (Ti, Zr, Hf, Ta, Nb, Mo, W, etc.) or a typical metal (Al, etc.).
- the catalyst includes an amine catalyst.
- a processing chamber for accommodating the substrate;
- a raw material supply system for supplying a raw material containing a metal element and a halogen group to a substrate in the processing chamber;
- An oxidizing agent supply system for supplying an oxidizing agent to the substrate in the processing chamber;
- a catalyst supply system for supplying a catalyst to the substrate in the processing chamber;
- a cycle in which the process of supplying the raw material to the substrate in the processing chamber and the process of supplying the oxidant to the substrate in the processing chamber are performed simultaneously is performed a predetermined number of times on the substrate.
- the catalyst is supplied together with the oxidant to the substrate, and the process of supplying the raw material is performed in the process of supplying the raw material.
- a controller configured to control the raw material supply system, the oxidant supply system, and the catalyst supply system so that the catalyst is not supplied to the substrate;
- a substrate processing apparatus is provided.
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Abstract
Description
基板に対して金属元素およびハロゲン基を含む原料を供給する工程と、
前記基板に対して酸化剤を供給する工程と、
を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する工程を有し、
前記酸化剤を供給する工程では、前記基板に対して前記酸化剤と一緒に触媒を供給し、
前記原料を供給する工程では、前記基板に対して前記触媒を非供給とする半導体装置の製造方法が提供される。
基板を収容する処理室と、
前記処理室内の基板に対して金属元素およびハロゲン基を含む原料を供給する原料供給系と、
前記処理室内の基板に対して酸化剤を供給する酸化剤供給系と、
前記処理室内の基板に対して触媒を供給する触媒供給系と、
前記処理室内の基板に対して前記原料を供給する処理と、前記処理室内の前記基板に対して前記酸化剤を供給する処理と、を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する処理を行い、前記酸化剤を供給する処理では、前記基板に対して前記酸化剤と一緒に前記触媒を供給し、前記原料を供給する処理では、前記基板に対して前記触媒を非供給とするように、前記原料供給系、前記酸化剤供給系および前記触媒供給系を制御するよう構成される制御部と、
を有する基板処理装置が提供される。
処理室内の基板に対して金属元素およびハロゲン基を含む原料を供給する手順と、
前記処理室内の前記基板に対して酸化剤を供給する手順と、
を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する手順をコンピュータに実行させ、
前記酸化剤を供給する手順では、前記基板に対して前記酸化剤と一緒に触媒を供給し、
前記原料を供給する手順では、前記基板に対して前記触媒を非供給とするプログラムを記録したコンピュータ読み取り可能な記録媒体が提供される。
以下、本発明の一実施形態について図1~図3を用いて説明する。
図1に示すように、処理炉202は加熱手段(加熱機構)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。ヒータ207は、後述するようにガスを熱で活性化(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(デバイス)の製造工程の一工程として、基板上に、金属元素を含む酸化膜を形成するシーケンス例について、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。
基板としてのウエハ200に対して金属元素およびハロゲン基を含む原料としてTiCl4ガスを供給するステップと、
ウエハ200に対して酸化剤としてH2Oガスを供給するステップと、
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)行うことで、ウエハ200上に、Tiを含む酸化膜としてチタン酸化膜(TiO2膜、以下、TiO膜ともいう)を形成する。
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に示されているように、複数枚のウエハ200を保持したボート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。
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。真空ポンプ246は、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常時作動させた状態を維持する。また、処理室201内のウエハ200が所望の成膜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。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に対する処理が終了するまでの間は継続して行われる。また、回転機構267によるボート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に対する処理が終了するまでの間は継続して行われる。
その後、次の2つのステップ、すなわち、ステップ1,2を順次実行する。
(TiCl4ガス供給)
バルブ243aを開き、ガス供給管232a内へTiCl4ガスを流す。TiCl4ガスは、MFC241aにより流量調整され、ガス供給孔250aから処理室201内へ供給され、排気管231から排気される。このとき、ウエハ200に対してTiCl4ガスが供給されることとなる。このとき同時にバルブ243dを開き、ガス供給管232d内へN2ガスを流す。N2ガスは、MFC241dにより流量調整され、TiCl4ガスと一緒に処理室201内へ供給され、排気管231から排気される。
第1の層が形成された後、バルブ243aを閉じ、TiCl4ガスの供給を停止する。このとき、APCバルブ244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もしくは第1の層の形成に寄与した後のTiCl4ガスを処理室201内から排除する。このとき、バルブ243d~243fは開いたままとして、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、これにより、処理室201内に残留するガスを処理室201内から排除する効果を高めることができる。MFC241d~241fで制御するN2ガスの供給流量は、ステップ1と同様とする。処理室201内をN2ガスでパージする時間(パージ時間)は、例えば1~120秒、好ましくは1~80秒、より好ましくは1~60秒とする。
(H2Oガスおよびピリジンガス供給)
ステップ1が終了した後、処理室201内のウエハ200に対し、H2Oガスおよびピリジンガスを供給する。
第2の層が形成された後、バルブ243b,243cを閉じ、H2Oガスおよびピリジンガスの供給をそれぞれ停止する。そして、ステップ1と同様の処理手順、処理条件により、処理室201内に残留する未反応もしくは第2の層の形成に寄与した後のH2Oガスおよびピリジン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、ステップ1と同様である。
上述したステップ1,2を非同時に行うサイクルを1回以上(所定回数)行うことにより、ウエハ200上に、所定組成および所定膜厚のTiO膜を形成することができる。上述のサイクルは、複数回繰り返すのが好ましい。すなわち、1サイクルあたりに形成されるTiO層の厚さを所望の膜厚よりも小さくし、上述のサイクルを所望の膜厚になるまで複数回繰り返すのが好ましい。例えば、1サイクルあたりに形成されるTiO層の厚さを0.1~1nmとし、TiO膜の膜厚が所望の膜厚、例えば、10~20nmになるまで上述のサイクルを複数回繰り返すのが好ましい。
バルブ243d~243fを開き、ガス供給管243d~243f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(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)。
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の外部に搬出される(ボートアンロード)。処理済のウエハ200は、ボート217より取出される(ウエハディスチャージ)。
本実施形態によれば、以下に示す一つ又は複数の効果を奏する。
本実施形態における成膜処理は、上述の態様に限定されず、以下に示す変形例のように変更することができる。
以上、本発明の実施形態を具体的に説明した。しかしながら、本発明は上述の実施形態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。
以下、本発明の好ましい態様について付記する。
本発明の一態様によれば、
基板に対して金属元素およびハロゲン基(ハロゲン元素)を含む原料を供給する工程と、
前記基板に対して酸化剤を供給する工程と、
を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する工程を有し、
前記酸化剤を供給する工程では、前記基板に対して前記酸化剤と一緒に触媒を供給し、
前記原料を供給する工程では、前記基板に対して前記触媒を非供給とする半導体装置の製造方法、および、基板処理方法が提供される。
付記1に記載の方法であって、好ましくは、
前記原料は窒素非含有である。
付記1または2に記載の方法であって、好ましくは、
前記原料は炭素非含有である。
付記1乃至3のいずれかに記載の方法であって、好ましくは、
前記原料は窒素および炭素非含有である。
付記1乃至4のいずれかに記載の方法であって、好ましくは、
前記原料はアミノ基非含有である。
付記1乃至5のいずれかに記載の方法であって、好ましくは、
前記ハロゲン基は、クロロ基、フルオロ基、ブロモ基またはヨード基を含む。
付記1乃至6のいずれかに記載の方法であって、好ましくは、
前記ハロゲン基はクロロ基を含む。
付記1乃至7のいずれかに記載の方法であって、好ましくは、
前記金属元素は遷移金属(Ti、Zr、Hf、Ta、Nb、Mo、W等)または典型金属(Al等)を含む。
付記1乃至8のいずれかに記載の方法であって、好ましくは、
前記金属元素は遷移金属を含む。
付記1乃至9のいずれかに記載の方法であって、好ましくは、
前記原料はハロゲン化金属を含む。
付記1乃至10のいずれかに記載の方法であって、好ましくは、
前記原料はハロゲン化チタン(TiCl4)を含む。
付記1乃至11のいずれかに記載の方法であって、好ましくは、
前記酸化剤はH2OまたはH2O2を含む。
付記1乃至12のいずれかに記載の方法であって、好ましくは、
前記触媒はアミン系触媒を含む。
本発明の他の態様によれば、
基板を収容する処理室と、
前記処理室内の基板に対して金属元素およびハロゲン基を含む原料を供給する原料供給系と、
前記処理室内の基板に対して酸化剤を供給する酸化剤供給系と、
前記処理室内の基板に対して触媒を供給する触媒供給系と、
前記処理室内の基板に対して前記原料を供給する処理と、前記処理室内の前記基板に対して前記酸化剤を供給する処理と、を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する処理を行い、前記酸化剤を供給する処理では、前記基板に対して前記酸化剤と一緒に前記触媒を供給し、前記原料を供給する処理では、前記基板に対して前記触媒を非供給とするように、前記原料供給系、前記酸化剤供給系および前記触媒供給系を制御するよう構成される制御部と、
を有する基板処理装置が提供される。
本発明のさらに他の態様によれば、
処理室内の基板に対して金属元素およびハロゲン基を含む原料を供給する手順と、
前記処理室内の前記基板に対して酸化剤を供給する手順と、
を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する手順をコンピュータに実行させ、
前記酸化剤を供給する手順では、前記基板に対して前記酸化剤と一緒に触媒を供給し、
前記原料を供給する手順では、前記基板に対して前記触媒を非供給とするプログラム、および、該プログラムを記録したコンピュータ読み取り可能な記録媒体が提供される。
201 処理室
207 ヒータ
232a~232f ガス供給管
249a,249b,249c ノズル
121 コントローラ
Claims (12)
- 基板に対して金属元素およびハロゲン基を含む原料を供給する工程と、
前記基板に対して酸化剤を供給する工程と、
を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する工程を有し、
前記酸化剤を供給する工程では、前記基板に対して前記酸化剤と一緒に触媒を供給し、
前記原料を供給する工程では、前記基板に対して前記触媒を非供給とする半導体装置の製造方法。 - 前記原料は窒素非含有である請求項1に記載の半導体装置の製造方法。
- 前記原料は炭素非含有である請求項1に記載の半導体装置の製造方法。
- 前記原料は窒素および炭素非含有である請求項1に記載の半導体装置の製造方法。
- 前記原料はアミノ基非含有である請求項1に記載の半導体装置の製造方法。
- 前記ハロゲン基は、クロロ基、フルオロ基、ブロモ基、またはヨード基を含む請求項1に記載の半導体装置の製造方法。
- 前記ハロゲン基はクロロ基を含む請求項1に記載の半導体装置の製造方法。
- 前記金属元素は遷移金属または典型金属を含む請求項1に記載の半導体装置の製造方法。
- 前記金属元素は遷移金属を含む請求項1に記載の半導体装置の製造方法。
- 前記原料はハロゲン化金属を含む請求項1に記載の半導体装置の製造方法。
- 基板を収容する処理室と、
前記処理室内の基板に対して金属元素およびハロゲン基を含む原料を供給する原料供給系と、
前記処理室内の基板に対して酸化剤を供給する酸化剤供給系と、
前記処理室内の基板に対して触媒を供給する触媒供給系と、
前記処理室内の基板に対して前記原料を供給する処理と、前記処理室内の前記基板に対して前記酸化剤を供給する処理と、を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する処理を行い、前記酸化剤を供給する処理では、前記基板に対して前記酸化剤と一緒に前記触媒を供給し、前記原料を供給する処理では、前記基板に対して前記触媒を非供給とするように、前記原料供給系、前記酸化剤供給系および前記触媒供給系を制御するよう構成される制御部と、
を有する基板処理装置。 - 処理室内の基板に対して金属元素およびハロゲン基を含む原料を供給する手順と、
前記処理室内の前記基板に対して酸化剤を供給する手順と、
を非同時に行うサイクルを所定回数行うことで、前記基板上に、前記金属元素を含む酸化膜を形成する手順をコンピュータに実行させ、
前記酸化剤を供給する手順では、前記基板に対して前記酸化剤と一緒に触媒を供給し、
前記原料を供給する手順では、前記基板に対して前記触媒を非供給とするプログラムを記録したコンピュータ読み取り可能な記録媒体。
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CN110310884A (zh) * | 2018-03-27 | 2019-10-08 | 株式会社国际电气 | 半导体装置的制造方法、基板处理装置及存储介质 |
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