WO2022065079A1 - シール構造、基板処理装置及び半導体装置の製造方法 - Google Patents
シール構造、基板処理装置及び半導体装置の製造方法 Download PDFInfo
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- WO2022065079A1 WO2022065079A1 PCT/JP2021/033341 JP2021033341W WO2022065079A1 WO 2022065079 A1 WO2022065079 A1 WO 2022065079A1 JP 2021033341 W JP2021033341 W JP 2021033341W WO 2022065079 A1 WO2022065079 A1 WO 2022065079A1
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- Prior art keywords
- gas
- seal structure
- metal plate
- heater
- contact
- Prior art date
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- 238000012545 processing Methods 0.000 title claims description 118
- 239000000758 substrate Substances 0.000 title claims description 43
- 239000004065 semiconductor Substances 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 69
- 239000002184 metal Substances 0.000 claims abstract description 69
- 239000003566 sealing material Substances 0.000 claims abstract description 15
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Images
Classifications
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- 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
- H01L21/67126—Apparatus for sealing, encapsulating, glassing, decapsulating or the like
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
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- H01J37/32467—Material
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- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
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- H01J37/32513—Sealing means, e.g. sealing between different parts of the vessel
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- H—ELECTRICITY
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- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32458—Vessel
- H01J37/32522—Temperature
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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
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
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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
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/02252—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by plasma treatment, e.g. plasma oxidation of the substrate
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- 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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- 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
- H01L21/67017—Apparatus for fluid treatment
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- 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
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- H—ELECTRICITY
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- 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
- H01L21/67109—Apparatus for thermal treatment mainly by convection
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- 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
- H01L21/67115—Apparatus for thermal treatment mainly by radiation
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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
- H01L21/67—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
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/6719—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the construction of the processing chambers, e.g. modular processing chambers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/20—Positioning, supporting, modifying or maintaining the physical state of objects being observed or treated
- H01J2237/2001—Maintaining constant desired temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/338—Changing chemical properties of treated surfaces
Definitions
- This disclosure relates to a sealing structure, a substrate processing device, and a method for manufacturing a semiconductor device.
- a process of performing a predetermined process such as an oxidation process or a nitriding process on the substrate may be carried out as one step of the manufacturing process.
- Japanese Patent Application Laid-Open No. 2014-75579 discloses that a pattern surface formed on a substrate is modified using a plasma-excited processing gas.
- a gas supply unit is provided at the upper part of the treatment chamber so that the reaction gas can be supplied to the treatment chamber.
- the substrate processing device may be provided with a seal structure to prevent gas mixing and gas leakage in the processing device.
- a seal structure to prevent gas mixing and gas leakage in the processing device.
- the purpose of the present disclosure is to suppress the heating of the sealing material due to the heat of the heater.
- it is a seal structure that seals between the first member heated by the heater and the second member arranged to face the first member, and is the first member. It has a metal plate for heat dissipation arranged in contact with the metal plate and a resin encapsulant arranged in contact with the metal plate and the second member, and has the metal plate and the encapsulant. Provides a sealing structure that seals between the first member and the second member.
- the substrate processing device according to the first embodiment of the present disclosure will be described below with reference to FIG.
- the substrate processing apparatus 100 according to the present embodiment is configured to mainly perform, for example, an oxidation treatment on a film formed on a substrate surface.
- the substrate processing apparatus 100 includes a processing chamber 201, a heater, a plate 1004 as a first member, a manifold 1006, and a seal structure 1000.
- the heater is configured to heat the inside of the processing chamber 201.
- the heaters are, for example, a lamp heater 1002 described later and a heater 217b provided on the susceptor 217.
- the heater 217b is, for example, a resistance heater that generates heat due to the electric resistance of the heater 217b itself.
- the plate 1004 is a portion constituting the first gas supply unit and the second gas supply unit, which will be described later.
- the plate 1004 is a member provided between, for example, the lamp heater 1002 and the processing chamber 201 of the wafer 200 as a substrate, and allows radiant heat from the lamp heater 1002 to pass through the processing chamber 201.
- At least a part of the plate 1004 is composed of, for example, quartz (transparent quartz) which is a non-metal transparent material.
- the manifold 1006 is arranged so as to face the plate 1004.
- the plate 1004 and the manifold 1006 are arranged in non-contact with each other. Thereby, when the plate 1004 is a quartz member and the manifold 1006 is a metal member, it is possible to prevent the plate 1004 from being damaged by the contact between the two.
- the seal structure 1000 is a structure that seals between the plate 1004 and the manifold 1006.
- the substrate processing apparatus 100 includes a processing furnace 202 that processes the wafer 200 as a substrate by using plasma.
- the processing furnace 202 is provided with a processing container 203 constituting the processing chamber 201.
- the processing container 203 includes a dome-shaped upper container 210 as a first container and a bowl-shaped lower container 211 as a second container.
- the processing chamber 201 is formed by covering the upper container 210 on the lower container 211.
- the upper container 210 is made of a non-metal material such as aluminum oxide (Al 2 O 3 ) or quartz (SiO 2 ), and the lower container 211 is made of aluminum (Al), for example.
- a gate valve 244 is provided on the lower side wall of the lower container 211.
- the gate valve 244 When the gate valve 244 is open, the wafer 200 is carried into the processing chamber 201 or carried out of the processing chamber 201 via the carry-in outlet 245 by using a transport mechanism (not shown). It is configured so that it can be used.
- the gate valve 244 is configured to be a sluice valve that maintains airtightness in the processing chamber 201 when it is closed.
- the processing chamber 201 has a plasma generation space 201a in which a resonance coil 212 is provided around the periphery, and a substrate processing space 201b that communicates with the plasma generation space 201a and processes the wafer 200.
- the plasma generation space 201a is a space in which plasma is generated, which is above the lower end of the resonance coil 212 and below the upper end of the resonance coil 212 in the processing chamber.
- the substrate processing space 201b is a space in which the substrate is processed by using plasma, and is a space below the lower end of the resonance coil 212.
- the diameters of the plasma generation space 201a and the substrate processing space 201b in the horizontal direction are configured to be substantially the same.
- a susceptor 217 constituting a substrate mounting portion (board mounting table) on which the wafer 200 is mounted is arranged.
- the susceptor 217 is made of a non-metal material such as aluminum nitride (AlN), ceramics, or quartz.
- a heater 217b as a heating mechanism is integrally embedded inside the susceptor 217.
- the heater 217b is configured to be able to heat the surface of the wafer 200 from, for example, about 25 ° C to 750 ° C when electric power is supplied.
- the susceptor 217 is electrically insulated from the lower container 211.
- the impedance adjustment electrode 217c is provided inside the susceptor 217, and is grounded via an impedance variable mechanism 275 as an impedance adjustment unit.
- the impedance variable mechanism 275 is composed of a coil and a variable capacitor, and is configured so that the impedance can be changed by controlling the inductance and resistance of the coil and the capacitance value of the variable capacitor. Thereby, the potential (bias voltage) of the wafer 200 can be controlled via the impedance adjusting electrode 217c and the susceptor 217. In this embodiment, it is possible to arbitrarily select whether or not the bias voltage control using the impedance adjusting electrode 217c is performed.
- the susceptor 217 is provided with a susceptor elevating mechanism 268 provided with a drive mechanism for elevating and lowering the susceptor. Further, the susceptor 217 is provided with a through hole 217a, and a wafer push-up pin 266 is provided on the bottom surface of the lower container 211. The through hole 217a and the wafer push-up pin 266 are provided at least three locations each facing each other. When the susceptor 217 is lowered by the susceptor elevating mechanism 268, the wafer push-up pin 266 is configured to penetrate through the through hole 217a.
- the substrate mounting portion according to the present embodiment is mainly composed of the susceptor 217, the heater 217b, and the electrode 217c.
- a plate 1004 is provided above the center of the processing chamber 201. As shown in FIG. 4, a manifold 1006 is arranged on the peripheral edge of the plate 1004 so as to face the plate 1004 in the vertical direction.
- the plate 1004 is placed on the edge 203b of the opening 203a above the processing container 203. Specifically, a flange portion 1004f is formed on the peripheral edge of the plate 1004, and the plate 1004 is placed on the edge edge 203b by engaging the flange portion 1004f with the edge edge 203b. The main portion of the plate 1004 excluding the flange portion 1004f is arranged so as to close the opening 203a.
- the manifold 1006 is mounted on the processing container 203.
- the space between the manifold 1006 and the processing container 203 is sealed by an O-ring 1014.
- a lid portion 1012 made of, for example, transparent quartz is provided above the manifold 1006.
- the space between the manifold 1006 and the lid portion 1012 is sealed by an O-ring 1016.
- a lamp heater 1002 is provided on the lid portion 1012. The radiant heat from the lamp heater 1002 reaches the inside of the processing chamber 201 through the lid portion 1012 and the plate 1004.
- the plate 1004 is heated by the lamp heater 1002 and the heater 217b. In addition, it may be indirectly heated by heat conduction from the processing container 203 that comes into contact with the container 203. In addition, it may be heated by the plasma generated by the plasma generation unit described later.
- the first buffer space 1018 to which the first gas is supplied is partitioned by the flange portion 1004f of the plate 1004, the processing container 203, the manifold 1006, and the metal plate 1008 described later.
- the first buffer space 1018 is formed in an annular shape around the plate 1004. At the time of substrate processing, the first buffer space 1018 becomes a decompressed space.
- the first gas is supplied to the first buffer space 1018 through the gas introduction path 1020 formed in the manifold 1006. Further, a first gas blowing hole 1022 is formed in the plate 1004 so that the first gas can be supplied from the first buffer space 1018 into the processing chamber 201 through the first gas blowing hole 1022.
- the gas introduction path 1020 has a downstream end of the oxygen-containing gas supply pipe 232a for supplying the oxygen-containing gas, a downstream end of the hydrogen-containing gas supply pipe 232b for supplying the hydrogen-containing gas, and an inert gas for supplying the inert gas. It is connected to the supply pipe 232c so as to merge.
- the oxygen-containing gas supply pipe 232a is provided with an oxygen-containing gas supply source 250a, a mass flow controller (MFC) 252a as a flow control device, and a valve 253a as an on-off valve.
- the hydrogen-containing gas supply pipe 232b is provided with a hydrogen-containing gas supply source 250b, an MFC 252b, and a valve 253b.
- the inert gas supply pipe 232c is provided with an inert gas supply source 250c, an MFC 252c, and a valve 253c.
- a valve 243a is provided on the downstream side where the oxygen-containing gas supply pipe 232a, the hydrogen-containing gas supply pipe 232b, and the inert gas supply pipe 232c meet, and is connected to the upstream end of the gas introduction path 1020.
- the valves 253a, 253b, 253c, 243a are opened and closed, and the flow rate of each gas is adjusted by the MFC 252a, 252b, 252c, via the oxygen-containing gas supply pipe 232a, the hydrogen-containing gas supply pipe 232b, and the inert gas supply pipe 232c. Therefore, the processing gas such as oxygen-containing gas, hydrogen gas-containing gas, and inert gas can be supplied into the processing chamber 201.
- This embodiment mainly consists of a first gas outlet hole 1022, an oxygen-containing gas supply pipe 232a, a hydrogen-containing gas supply pipe 232b, an inert gas supply pipe 232c, MFC252a, 252b, 252c, and valves 253a, 253b, 253c, 243a.
- the first gas supply unit (first gas supply system) according to the above is configured.
- the first gas supply unit is configured to supply the oxygen-containing gas as an oxidation species source into the treatment chamber 201.
- a second buffer space 1028 to which a second gas is supplied is partitioned by a lid portion 1012, a plate 1004, a manifold 1006, and a metal plate 1008 (FIG. 4) described later. ..
- the second buffer space 1028 becomes a decompressed space.
- the second gas is supplied to the second buffer space 1028 through the gas introduction path 1030 formed in the manifold 1006.
- a second gas outlet 1004a is formed in the central portion of the plate 1004 so that the second gas can be supplied from the second buffer space 1028 into the processing chamber 201 through the second gas outlet 1004a.
- the gas introduction path 1030 has a downstream end of the oxygen-containing gas supply pipe 232d for supplying the oxygen-containing gas, a downstream end of the hydrogen-containing gas supply pipe 232e for supplying the hydrogen-containing gas, and an inert gas for supplying the inert gas. It is connected to the supply pipe 232f so as to merge.
- the oxygen-containing gas supply pipe 232d is provided with an oxygen-containing gas supply source 250d, an MFC 252d, and a valve 253d.
- the hydrogen-containing gas supply pipe 232e is provided with a hydrogen-containing gas supply source 250e, an MFC 252e, and a valve 253e.
- the inert gas supply pipe 232f is provided with an inert gas supply source 250f, an MFC 252f, and a valve 253f.
- a valve 243c is provided on the downstream side where the oxygen-containing gas supply pipe 232d, the hydrogen-containing gas supply pipe 232e, and the inert gas supply pipe 232f meet, and is connected to the upstream end of the gas introduction path 1030.
- the valves 253d, 253e, 253f, 243c are opened and closed, and the flow rate of each gas is adjusted by the MFC 252d, 252e, 252f, via the oxygen-containing gas supply pipe 232d, the hydrogen-containing gas supply pipe 232e, and the inert gas supply pipe 232f. Therefore, the processing gas such as oxygen-containing gas, hydrogen gas-containing gas, and inert gas can be supplied into the processing chamber 201.
- This embodiment mainly consists of a second gas outlet 1004a, an oxygen-containing gas supply pipe 232d, a hydrogen-containing gas supply pipe 232e, an inert gas supply pipe 232f, MFC252d, 252e, 252f, and valves 253d, 253e, 253f, 243c.
- the second gas supply unit (second gas supply system) according to the above is configured.
- the second gas supply unit is configured to supply the hydrogen concentration adjusting gas for adjusting the hydrogen concentration containing hydrogen into the processing chamber 201.
- the second gas supply unit is configured to supply the second gas to the outer peripheral region, which is the first region in the plasma generation space 201a (described later) along the inner wall of the processing chamber 201. Further, the first gas supply unit is configured to supply the first gas to a central region which is a region surrounded by an outer peripheral region and is a second region in the plasma generation space 201a.
- a gas exhaust port 235 for exhausting a reaction gas or the like from the inside of the processing chamber 201 is provided on the side wall of the lower container 211.
- the upstream end of the gas exhaust pipe 231 is connected to the gas exhaust port 235.
- the gas exhaust pipe 231 is provided with an APC (Auto Pressure Controller) valve 242 as a pressure regulator, a valve 243b as an on-off valve, and a vacuum pump 246 as a vacuum exhaust device.
- APC Auto Pressure Controller
- the exhaust unit according to this embodiment is mainly composed of a gas exhaust port 235, a gas exhaust pipe 231 and an APC valve 242, and a valve 243b.
- the vacuum pump 246 may be included in the exhaust unit.
- a spiral resonance coil 212 as a high-frequency electrode is provided on the outer peripheral portion of the processing chamber 201, that is, on the outside of the side wall of the upper container 210 so as to surround the processing chamber 201.
- a matching device 274 that matches the impedance and output frequency of the RF sensor 272, the high frequency power supply 273, and the high frequency power supply 273 is connected to the resonance coil 212.
- the high frequency power supply 273 supplies high frequency power (RF power) to the resonance coil 212.
- the RF sensor 272 is provided on the output side of the high frequency power supply 273 and monitors the information of the high frequency traveling wave and the reflected wave supplied.
- the reflected power monitored by the RF sensor 272 is input to the matching unit 274, and the matching unit 274 uses the high frequency power supply 273 to minimize the reflected wave based on the reflected wave information input from the RF sensor 272. It controls the impedance and the frequency of the output high frequency power.
- the resonance coil 212 forms a standing wave having a predetermined wavelength
- the winding diameter, winding pitch, and number of turns are set so as to resonate at a constant wavelength. That is, the electrical length of the resonance coil 212 is set to a length corresponding to an integral multiple of one wavelength at a predetermined frequency of the high frequency power supplied from the high frequency power supply 273.
- the resonance coil 212 is applied with high frequency power of, for example, 800 kHz to 50 MHz and 0.1 to 5 kW in consideration of the applied power, the generated magnetic field strength, the outer shape of the device to be applied, and the like, and is 200 to 500 mm.
- the coil diameter is set to the above, and the coil is wound around the outer peripheral side of the plasma generation space 201a about 2 to 60 times.
- the notation of a numerical range such as "800 kHz to 50 MHz" in the present specification means that the lower limit value and the upper limit value are included in the range.
- “800 kHz to 50 MHz” means "800 kHz or more and 50 MHz or less”. The same applies to other numerical ranges.
- the shielding plate 223 is provided to shield the electric field outside the resonance coil 212.
- the plasma generation unit according to this embodiment is mainly composed of the resonance coil 212, the RF sensor 272, and the matching unit 274.
- the high frequency power supply 273 may be included as the plasma generation unit.
- this configuration high-frequency power is supplied to the resonance coil 212, so that a ring-shaped plasma is generated in a region near the resonance coil 212 and along the inner circumference of the processing chamber 201. That is, this ring-shaped plasma is generated in the outer peripheral region in the processing chamber 201.
- this ring-shaped plasma is generated at the height where the electrical midpoint of the resonance coil 212 is located, that is, at the intermediate height position between the upper end and the lower end of the resonance coil 212.
- the seal structure 1000 is a structure that seals between the plate 1004 (first member) and the manifold 1006 (second member), and has a metal plate 1008 and an O-ring 1010 as a resin-made sealing material. And have.
- the metal plate 1008 and the O-ring 1010 seal between the plate 1004 and the manifold 1006.
- the flange portion 1004f of the plate 1004 is also a contact portion in contact with the metal plate 1008.
- the manifold 1006 is, for example, a metal member.
- the resin material forming the O-ring 1010 examples include rubber materials such as silicon rubber and fluororubber, but the resin material is not limited to the rubber material, and other elastic resin materials that function as a sealing material may be used. You can also. Further, although the O-ring is used as the sealing material in this embodiment, the shape is not limited to the ring shape as long as it functions as the sealing material, and other shapes such as a plate shape and a rod shape may be used.
- the metal plate 1008 is formed in an annular shape and is fixed in contact with the manifold 1006 at a position away from the O-ring 1010. Specifically, it is fixed to the manifold 1006 by, for example, a metal bolt 1024. The central portion of the bolt 1024 penetrates in the axial direction to allow evacuation in the screw hole. In the illustrated example, a seal spacer 1026 is arranged between the metal plate 1008 and the manifold 1006. Even in this case, the metal plate 1008 and the manifold 1006 are in contact with each other via the bolt 1024. Since the metal plate 1008, the manifold 1006, and the bolt 1024 are all metal members, the heat of the metal plate 1008 is transferred to the manifold 1006 via the bolt 1024.
- the metal plate 1008 is in contact with and fixed to the manifold 1006 at a position away from the O-ring 1010, the heat transferred from the metal plate 1008 to the manifold 1006 prevents the O-ring 1010 from being heated. Can be done.
- the metal plate 1008 is thin in order to prevent damage when the plate 1004 is a quartz member.
- the thickness of the metal plate 1008 is a predetermined value in the range of, for example, 0.1 to 1.0 mm. If the thickness of the metal plate 1008 is less than 0.1 mm, the metal plate 1008 itself is more likely to be damaged due to contact with the plate 1004 and the bolt 1024, and heat is conducted to the manifold 1006 and the bolt 1024 to conduct heat to the O-ring. It becomes difficult to suppress the temperature rise of 1010. By setting the thickness to 0.1 mm or more, it is possible to prevent the metal plate 1008 itself from being damaged and to suppress the temperature rise of the O-ring 1010.
- the thickness of the metal plate 1008 exceeds 1.0 mm, the elasticity of the metal plate 1008 becomes small, which may damage the plate 1004 which is a quartz member in contact with the metal plate 1008.
- the metal plate 1008 may be formed of at least one of aluminum, nickel alloy, and stainless steel.
- the seal spacer 1026 may be omitted. In this case, since the metal plate 1008 comes into direct surface contact with the manifold 1006, the heat of the metal plate 1008 is easily transferred to the manifold 1006.
- the O-ring 1010 is mainly (a) radiant heat radiated from at least one of the lamp heater 1002 and the heater 217b and transmitted through at least one of the plate 1004 and the processing container 203. b) It is heated by radiant heat radiated from at least one of the heated plate 1004 and the processing container 203, (c) conduction heat transmitted from the contact surface with the heated plate 1004, and the like.
- the metal plate 1008 is arranged between the heater 217b and the O-ring 1010 so as to shield the O-ring 1010 from the radiant heat of the heater 217b radiated directly or indirectly toward the O-ring 1010 from below. There is. Further, the metal plate 1008 is arranged so as to shield the radiant heat directly or indirectly radiated from the lamp heater 1002 (FIG. 1) toward the O-ring 1010 by the O-ring 1010. That is, the metal plate 1008 is arranged so as to shield the O-ring from the above-mentioned heat sources (a) and (b).
- the manifold 1006 is cooled by a cooling mechanism.
- the manifold 1006 is provided with a refrigerant flow path 1032 as a cooling mechanism, and the heat of the manifold 1006 can be removed by flowing the refrigerant through the refrigerant flow path 1032. Therefore, the heat of the metal plate 1008 is efficiently removed via the manifold 1006. That is, the metal plate 1008 is arranged so as to insulate the O-ring 1010 from the above-mentioned heat source (c).
- the plate 1004 may be configured by, for example, a combination of an inner peripheral portion 1004b and an outer peripheral portion 1004c.
- the inner peripheral portion 1004b is a transparent portion made of, for example, transparent quartz.
- the outer peripheral portion 1004c is formed in a cylindrical shape or a ring shape, and is placed so as to be locked to the edge 203b of the opening 203a of the processing container 203.
- the inner peripheral portion 1004b is formed in a disk shape and is arranged in contact with the stepped portion 1004d of the outer peripheral portion 1004c.
- the outer peripheral portion 1004c is also a contact portion that comes into contact with the metal plate 1008.
- the outer peripheral portion 1004c is an opaque portion made of an opaque material that hinders the transmission of radiant heat of the lamp heater 1002, for example, opaque quartz.
- the outer peripheral portion 1004c which is the contact portion, with an opaque material, it is possible to reduce the radiant heat that passes through the outer peripheral portion 1004c and reaches the metal plate 1008, the O-ring 1010, and the manifold 1006. Further, by bringing the opaque portion into contact with the metal plate 1008, it is possible to prevent the O-ring 1010 from being heated by the opaque portion heated by the radiant heat.
- the controller 221 as a control unit includes an APC valve 242, a valve 243b and a vacuum pump 246 through the signal line A, a susceptor elevating mechanism 268 through the signal line B, and a heater power adjustment mechanism 276 and an impedance variable mechanism 275 through the signal line C. It is possible to control the gate valve 244 through the signal line D, the RF sensor 272, the high frequency power supply 273 and the matching unit 274 through the signal line E, and the MFC 252a to 252f and the valves 253a to 253f, 243a, 243c through the signal line F, respectively. It is configured as follows.
- the controller 221 which is a control unit (control means) is configured as a computer including a CPU (Central Processing Unit) 221a, a RAM (Random Access Memory) 221b, a storage device 221c, and an I / O port 221d.
- the RAM 221b, the storage device 221c, and the I / O port 221d are configured so that data can be exchanged with the CPU 221a via the internal bus 221e.
- An input / output device 222 configured as, for example, a touch panel or a display is connected to the controller 221.
- the storage device 221c is composed of, for example, a flash memory, an HDD (Hard Disk Drive), or the like.
- a control program that controls the operation of the board processing device, a program recipe that describes the procedure and conditions of the board processing described later, and the like are readablely stored.
- the process recipes are combined so that the controller 221 can execute each procedure in the substrate processing step described later and obtain a predetermined result, and functions as a program.
- this program recipe, control program, etc. are collectively referred to as a program.
- the term program is used in the present specification, it may include only a program recipe alone, a control program alone, or both.
- the RAM 221b is configured as a memory area (work area) in which programs, data, and the like read by the CPU 221a are temporarily held.
- the I / O port 221d includes the above-mentioned MFC 252a to 252f, valves 253a to 253f, 243a, 243b, 243c, gate valve 244, APC valve 242, vacuum pump 246, RF sensor 272, high frequency power supply 273, matching unit 274, and susceptor lift. It is connected to a mechanism 268, an impedance variable mechanism 275, a heater power adjustment mechanism 276, and the like.
- the CPU 221a is configured to read and execute a control program from the storage device 221c and read a process recipe from the storage device 221c in response to an input of an operation command from the input / output device 222 or the like. Then, the CPU 221a performs an opening adjustment operation of the APC valve 242, an opening / closing operation of the valve 243b, and a start of the vacuum pump 246 through the I / O port 221d and the signal line A so as to follow the contents of the read process recipe.
- the controller 221 is stored in an external storage device (for example, a magnetic tape, a magnetic disk such as a flexible disk or a hard disk, an optical disk such as a CD or DVD, a magneto-optical disk such as MO, a semiconductor memory such as a USB memory or a memory card) 223. It can be configured by installing the above program on the computer.
- the storage device 221c and the external storage device 223 are configured as a computer-readable recording medium. Hereinafter, these are collectively referred to simply as a recording medium. In the present specification, when the term recording medium is used, the storage device 221c alone may be included, the external storage device 223 alone may be included, or both of them may be included.
- 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 223.
- the semiconductor device manufacturing method includes a step of carrying the substrate into the processing chamber 201 of the substrate processing device 100 (for example, the substrate carrying step S110 of FIG. 3) and a step of heating the wafer 200 by a lamp heater 1002 or the like as a heater (for example, FIG. 3.
- the temperature rise / vacuum exhaust step S120 includes a step of carrying the substrate into the processing chamber 201 of the substrate processing device 100 (for example, the substrate carrying step S110 of FIG. 3) and a step of heating the wafer 200 by a lamp heater 1002 or the like as a heater (for example, FIG. 3.
- the temperature rise / vacuum exhaust step S120 The temperature rise / vacuum exhaust step S120).
- the substrate processing apparatus 100 includes a processing chamber 201 for processing the wafer 200, a lamp heater 1002 as a lamp configured to heat the inside of the processing chamber 201, and a plate 1004 as a first member heated by the lamp heater 1002. And a manifold 1006 arranged to face the plate 1004, and a seal structure 1000 for sealing between the plate 1000 and the manifold 1006.
- the seal structure 1000 comprises a metal plate 1008 for heat dissipation arranged in contact with the plate 1000, and an O-ring 1010 as a resin encapsulant arranged in contact with the metal plate 1008 and the manifold 1006.
- the plate 1000 and the manifold 1006 are sealed by a metal plate 1008 and an O-ring 1010.
- the substrate processing apparatus 100 is formed on the surface of the wafer 200 as one step of a manufacturing process of a semiconductor device such as a flash memory.
- a semiconductor device such as a flash memory.
- An example of a method of forming an oxide film by oxidizing the formed film will be described.
- the operation of each part constituting the substrate processing apparatus 100 is controlled by the controller 221.
- the above wafer 200 is carried into the processing chamber 201 and accommodated. Specifically, the susceptor elevating mechanism 268 lowers the susceptor 217 to the transfer position of the wafer 200. As a result, the wafer push-up pin 266 is in a state of protruding from the through hole 217a by a predetermined height from the surface of the susceptor 217.
- the gate valve 244 is opened, and the wafer 200 is carried into the processing chamber 201 from the vacuum transfer chamber adjacent to the processing chamber 201 by using a wafer transfer mechanism (not shown).
- the carried-in wafer 200 is supported in a horizontal posture on the wafer push-up pin 266.
- the gate valve 244 is closed to seal the inside of the processing chamber 201.
- the susceptor elevating mechanism 268 raises the susceptor 217, so that the wafer 200 is supported on the upper surface of the susceptor 217.
- the heater 217b is preheated, and by holding the wafer 200 on the susceptor 217 in which the heater 217b is embedded, the wafer 200 is heated to a predetermined value in the range of, for example, 150 to 750 ° C.
- the processing chamber 201 is also heated by the lamp heater 1002. Further, while the temperature of the wafer 200 is raised, the inside of the processing chamber 201 is evacuated by the vacuum pump 246 via the gas exhaust pipe 231, and the pressure in the processing chamber 201 is set to a predetermined value.
- the vacuum pump 246 is operated at least until the substrate unloading step S160 described later is completed.
- the metal plate 1008 and the O-ring 1010 in the seal structure 1000 seal between the plate 1004 and the manifold 1006. Therefore, since the metal plate 1008 is arranged between the plate 1004 heated by the heater such as the lamp heater 1002 and the O-ring 1010, the radiant heat from the heater and the plate 1004 to the O-ring 1010 is shielded and the O-ring 1010 is shielded. It is possible to suppress the temperature rise of the O-ring and the deterioration accompanying it.
- the metal plate 1008 is formed in an annular shape and is fixed in contact with the manifold 1006 at a position away from the O-ring 1010. Therefore, the heat of the metal plate 1008 can be conducted to the manifold 1006 to suppress the temperature rise of the metal plate 1006.
- the manifold 1006 is cooled by a cooling mechanism. Therefore, the temperature rise of the O-ring 1010 can be suppressed by cooling the O-ring 1010 and the metal plate 1008 that come into contact with the manifold 1006.
- the seal structure 100 can be suitably used when the first buffer space 1018 and the second buffer space 1028 are depressurized. Even when the pressure that can be sealed is lowered by using the metal plate 1008, the first buffer space 1018 and the first buffer space 1018 and the first buffer space 1018 are set by making the first buffer space 1018 and the second buffer space 1028 a decompression (vacuum) space. Gas leakage between the two buffer spaces 1028 can be prevented and separation can be maintained.
- reaction gas supply step S130 a mixed gas of oxygen-containing gas and hydrogen-containing gas is started to be supplied from the first gas supply unit to the outer peripheral region of the treatment chamber 201 as the first gas which is an oxygen-containing oxidation seed source gas.
- the valves 253a and 253b are opened, and the supply of the first gas to the processing chamber 201 is started via the gas outlet 239 while the flow rates are controlled by the MFC 252a and the MFC 252b.
- oxygen-containing gas examples include oxygen (O 2 ) gas, nitrous oxide (N 2 O) gas, nitrogen monoxide (NO) gas, nitrogen dioxide (NO 2 ) gas, ozone (O 3 ) gas, and water vapor (O 3) gas.
- H2O gas nitrogen monoxide (NO) gas, nitrogen dioxide (NO 2 ) gas, ozone (O 3 ) gas, and water vapor (O 3) gas.
- H2O gas nitrogen monoxide (NO) gas, nitrogen dioxide (NO 2 ) gas, ozone (O 3 ) gas, and water vapor (O 3) gas.
- H2O gas nitrogen monoxide
- CO 2 carbon dioxide
- hydrogen-containing gas for example, hydrogen (H 2 ) gas, deuterium (D 2 ) gas, H 2 O gas, ammonia (NH 3 ) gas and the like can be used.
- hydrogen-containing gas one or more of these can be used.
- H 2 O gas When H 2 O gas is used as the oxygen-containing gas, it is preferable to use a gas other than H 2 O gas as the hydrogen-containing gas, and when H 2 O gas is used as the hydrogen-containing gas, H is used as the oxygen-containing gas. 2 It is preferable to use a gas other than O gas.
- a gas other than O gas As the inert gas, for example, nitrogen (N 2 ) gas can be used, and in addition, a rare gas such as argon (Ar) gas, helium (He) gas, neon (Ne) gas, and xenone (Xe) gas can be used. Can be used. As the inert gas, one or more of these can be used.
- the flow rate with MFC252a and MFC252b By controlling the flow rate with MFC252a and MFC252b, at least one of the total flow rate of the first gas and the composition of the first gas (particularly the hydrogen content) is adjusted.
- the composition of the first gas can be easily adjusted by changing the mixing ratio (flow rate ratio) of the hydrogen-containing gas and the oxygen-containing gas.
- the total flow rate of the first gas is set to, for example, 1000 to 10000 ccm
- the flow rate of the oxygen-containing gas in the first gas is set to a predetermined value in the range of, for example, 20 to 4000 sccm.
- the flow rate of the hydrogen-containing gas in the first gas is set to a predetermined value in the range of, for example, 20 to 1000 sccm.
- the content ratio of the hydrogen-containing gas and the oxygen-containing gas contained in the first gas shall be a predetermined value in the range of 0: 100 to 95: 5.
- the supply of the mixed gas of the oxygen-containing gas and the hydrogen-containing gas as the second gas is started from the second gas supply unit to the central region of the processing chamber 201.
- the valve 253d and the valve 253e are opened, and while the flow rate is controlled by the MFC 252d and the MFC 252e, the supply of the second gas into the processing chamber 201 is started through the gas outlet hole 303 provided in the gas supply ring 300. do.
- the flow rate with MFC252d and MFC252e By controlling the flow rate with MFC252d and MFC252e, at least one of the total flow rate of the second gas and the composition of the second gas (particularly the hydrogen content) is adjusted. Similar to the first gas, the composition of the second gas can be easily adjusted by changing the mixing ratio of the hydrogen-containing gas and the oxygen-containing gas.
- the total flow rate of the second gas is equal to or less than the total flow rate of the first gas, for example, 100 to 5000 sccm, and the flow rate of the oxygen-containing gas in the second gas is, for example, in the range of 0 to 5000 sccm. It shall be a predetermined value within. Further, the flow rate of the hydrogen-containing gas in the second gas is set to a predetermined value in the range of, for example, 0 to 5000 sccm. In the present embodiment, the ratio of the hydrogen-containing gas contained in the second gas (that is, the hydrogen content of the first gas) is set to a predetermined value within the range of 0 to 100%. The total flow rate of the second gas is preferably equal to or less than that of the first gas.
- Control of hydrogen concentration distribution it is possible to control the hydrogen concentration distribution in the processing chamber 201 by controlling at least one of the flow rate and the hydrogen content for each of the first gas and the second gas.
- the hydrogen concentration distribution is controlled so that the density distribution of oxidized species in the plasma treatment step described later becomes desired. It is desirable that the hydrogen content of the second gas is adjusted so as to be different from the hydrogen content of the first gas. By using the second gas having a hydrogen content different from that of the first gas, it becomes easy to control the flow rates of the first gas and the second gas to adjust the hydrogen concentration distribution in the processing chamber 201.
- the opening degree of the APC valve 242 is adjusted to control the exhaust gas in the processing chamber 201 so that the pressure in the processing chamber 201 becomes a predetermined pressure in the range of, for example, 5 to 260 Pa. In this way, while appropriately exhausting the inside of the processing chamber 201, the supply of the first gas and the second gas is continued until the end of the plasma processing step S140 described later.
- the first gas is supplied to the plasma generation region, which is the region where plasma is generated at the second plasma density.
- the first gas is supplied to the plasma generation region, which is the region in which the ring-shaped plasma is excited, in the outer peripheral region in the processing chamber 201 near the resonance coil 212, and is mainly the first.
- the plasma excitation of the gas produces the above-mentioned oxidized species.
- the second gas is a region where plasma is generated at a second plasma density lower than the first plasma density, or a region where plasma is not generated (the second plasma density is substantially 0). It is supplied to a non-plasma generation region (a region). That is, the second gas is supplied to a region where the plasma density is different from that of the first gas. In this embodiment, in particular, the second gas is supplied to the plasma non-generating region formed inside the ring-shaped plasma.
- the oxidized species generated by the plasma loses or reduces (that is, inactivates) its ability as an oxidized species (oxidizing ability) when it reacts with hydrogen in the atmosphere. Therefore, the decay rate (attenuation amount) of the density (concentration) of the oxidized species in the atmosphere changes according to the hydrogen concentration in the atmosphere in which the oxidized species are present. The higher the hydrogen concentration, the higher the attenuation of the oxidized species, and the lower the hydrogen concentration, the lower the attenuation of the oxidized species.
- the oxidized species generated in the plasma generation region diffuses in the plasma non-generation region, it reacts with hydrogen in the plasma non-generation region and is gradually deactivated. Therefore, the attenuation of the density of oxidized species diffused in the non-plasma region can be adjusted by the hydrogen concentration in the region. That is, the density distribution of oxidized species in the non-plasma generation region can be arbitrarily adjusted by controlling the hydrogen concentration distribution in the region.
- the wafer 200 in the region is adjusted. Controls the hydrogen concentration distribution in the in-plane direction. Then, by controlling the hydrogen concentration distribution, the density distribution of the oxidized species diffused in the space above the wafer 200 is adjusted. Oxidized species whose density distribution in the in-plane direction of the wafer 200 is adjusted in this way is supplied to the surface of the wafer 200.
- the output of the power from the high frequency power supply 273 is stopped, and the plasma discharge in the processing chamber 201 is stopped. Further, the valves 253a, 253b, 253d, 253e are closed to stop the supply of the first gas and the second gas into the processing chamber 201. As a result, the plasma processing step S140 is completed.
- Substrate carry-out process S160 After that, the susceptor 217 is lowered to the transfer position of the wafer 200, and the wafer 200 is supported on the wafer push-up pin 266. Then, the gate valve 244 is opened, and the wafer 200 is carried out of the processing chamber 201 by using the wafer transfer mechanism. As described above, the substrate processing step according to the present embodiment is completed.
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Abstract
Description
本開示の第1実施形態に係る基板処理装置について、図1を用いて以下に説明する。本実施形態に係る基板処理装置100は、主に基板面上に形成された膜に対して例えば酸化処理を行うように構成されている。基板処理装置100は、処理室201と、ヒータと、第1部材としてのプレート1004と、マニホールド1006と、シール構造1000と、を備えている。
基板処理装置100は、基板としてのウエハ200をプラズマを用いて処理する処理炉202を備えている。処理炉202には、処理室201を構成する処理容器203が設けられている。処理容器203は、第1の容器であるドーム型の上側容器210と、第2の容器である碗型の下側容器211とを備えている。上側容器210が下側容器211の上に被さることにより、処理室201が形成される。上側容器210は、例えば酸化アルミニウム(Al2O3)または石英(SiO2)等の非金属材料で形成されており、下側容器211は、例えばアルミニウム(Al)で形成されている。
処理室201の底側中央には、ウエハ200を載置する基板載置部(基板載置台)を構成するサセプタ217が配置されている。サセプタ217は例えば窒化アルミニウム(AlN)、セラミックス、石英等の非金属材料から形成されている。
以下において、第1ガス供給部から供給されるガスを第1ガスと称する。処理室201の中央上方には、プレート1004が設けられている。図4に示されるように、プレート1004の周縁には、マニホールド1006が、プレート1004と上下方向に対向して配置されている。
以下において、第2ガス供給部から供給されるガスを第2ガスと称する。図1に示されるように、蓋部1012と、プレート1004と、マニホールド1006と、後述する金属プレート1008(図4)とにより、第2ガスが供給される第2バッファ空間1028が区画されている。基板処理時には、第2バッファ空間1028は減圧された空間となる。第2バッファ空間1028には、マニホールド1006に形成されたガス導入路1030を通じて第2ガスが供給されるようになっている。プレート1004の中央部には、第2ガス吹出し口1004aが形成されており、第2ガス吹出し口1004aを通じて第2バッファ空間1028から処理室201内に第2ガスを供給できるようになっている。
下側容器211の側壁には、処理室201内から反応ガスなどを排気するガス排気口235が設けられている。ガス排気口235には、ガス排気管231の上流端が接続されている。ガス排気管231には、圧力調整器としてのAPC(Auto Pressure Controller)バルブ242、開閉弁としてのバルブ243b、真空排気装置としての真空ポンプ246が設けられている。
処理室201の外周部、すなわち上側容器210の側壁の外側には、処理室201を囲うように、高周波電極としての、螺旋状の共振コイル212が設けられている。共振コイル212には、RFセンサ272、高周波電源273、高周波電源273のインピーダンスや出力周波数の整合を行う整合器274が接続される。
図4において、シール構造1000は、プレート1004(第1部材)とマニホールド1006(第2部材)の間を封止する構造であり、金属プレート1008と、樹脂製の封止材としてのOリング1010とを有している。この金属プレート1008とOリング1010により、プレート1004とマニホールド1006の間が封止されている。プレート1004のフランジ部1004fは、金属プレート1008と接触する接触部でもある。マニホールド1006は、例えば金属部材である。
制御部としてのコントローラ221は、信号線Aを通じてAPCバルブ242、バルブ243b及び真空ポンプ246を、信号線Bを通じてサセプタ昇降機構268を、信号線Cを通じてヒータ電力調整機構276及びインピーダンス可変機構275を、信号線Dを通じてゲートバルブ244を、信号線Eを通じてRFセンサ272、高周波電源273及び整合器274を、信号線Fを通じてMFC252a~252f及びバルブ253a~253f,243a,243cを、それぞれ制御することが可能なように構成されている。
半導体装置の製造方法は、基板処理装置100の処理室201に基板を搬入する工程(例えば図3の基板搬入工程S110)と、ヒータとしてのランプヒータ1002等によりウエハ200を加熱する工程(例えば図3の昇温・真空排気工程S120)と、を有する。
次に、本実施形態に係る基板処理工程について、上述の基板処理装置100を用いて、例えばフラッシュメモリ等の半導体デバイスの製造工程の一工程として、ウエハ200の表面に形成された膜を酸化して酸化膜を形成する方法の例について説明する。以下の説明において、基板処理装置100を構成する各部の動作は、コントローラ221により制御される。
続いて、処理室201内に搬入されたウエハ200の昇温を行う。ヒータ217bは予め加熱されており、ヒータ217bが埋め込まれたサセプタ217上にウエハ200を保持することで、例えば150~750℃の範囲内の所定値にウエハ200を加熱する。また、ランプヒータ1002によっても処理室201が加熱される。また、ウエハ200の昇温を行う間、真空ポンプ246によりガス排気管231を介して処理室201内を真空排気し、処理室201内の圧力を所定の値とする。真空ポンプ246は、少なくとも後述の基板搬出工程S160が終了するまで作動させておく。
次に、第1ガス供給部から処理室201の外周領域に、酸素を含有する酸化種源ガスである第1ガスとして、酸素含有ガスと水素含有ガスの混合ガスの供給を開始する。具体的には、バルブ253a及びバルブ253bを開け、MFC252a及びMFC252bにて流量制御しながら、ガス吹出口239を介して処理室201内へ第1ガスの供給を開始する。
本工程においては、第1ガス、第2ガスのそれぞれについて、流量および水素含有率の少なくとも一方を制御することにより、処理室201内の水素濃度分布を制御することが可能である。水素濃度分布は、後述するプラズマ処理工程における酸化種の密度分布が所望のものとなるように制御される。第2ガスの水素含有率は、第1ガスの水素含有率と異なるように調整されることが望ましい。第1ガスとは水素含有率が異なる第2ガスを用いることにより、第1ガスと第2ガスの流量をそれぞれ制御して、処理室201内の水素濃度分布を調整することが容易になる。
処理室201内の圧力が安定したら、共振コイル212に対して高周波電源273から高周波電力の印加を開始する。これにより、第1ガスが供給されているプラズマ生成空間201a内に高周波電磁界が形成され、係る電磁界により、プラズマ生成空間の共振コイル212の電気的中点に相当する高さ位置に、最も高いプラズマ密度を有するリング状の誘導プラズマが励起される。プラズマ状の第1ガスは解離し、Oを含むOラジカルやヒドロキシラジカル(OHラジカル)等の酸素ラジカル、原子状酸素(O)、O3、酸素イオン等の酸化種が生成される。
ここで、プラズマによって生成された酸化種は、雰囲気中の水素と反応するとその酸化種としての能力(酸化能力)を失うか、又は低下させる(すなわち失活する)。そのため、酸化種が存在する雰囲気中の水素濃度に応じて、その雰囲気中における酸化種の密度(濃度)の減衰速度(減衰量)が変化する。水素濃度が高いほど酸化種の減衰量は増大し、水素濃度が低いほど酸化種の減衰量は低下する。
第1ガス及び第2ガスの供給を停止したら、ガス排気管231を介して処理室201内を真空排気する。これにより、処理室201内の酸素含有ガスや水素含有ガス、これらガスの反応により発生した排ガス等を処理室201外へと排気する。その後、APCバルブ242の開度を調整し、処理室201内の圧力を処理室201に隣接する真空搬送室と同じ圧力に調整する。
その後、サセプタ217をウエハ200の搬送位置まで下降させ、ウエハ突上げピン266上にウエハ200を支持させる。そして、ゲートバルブ244を開き、ウエハ搬送機構を用いてウエハ200を処理室201外へ搬出する。以上により、本実施形態に係る基板処理工程を終了する。
以上、本開示の実施形態の一例について説明したが、本開示の実施形態は、上記に限定されるものでなく、上記以外にも、その主旨を逸脱しない範囲内において種々変形して実施可能であることは勿論である。
本明細書に記載されたすべての文献、特許出願、および技術規格は、個々の文献、特許出願、および技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。
Claims (20)
- ヒータによって加熱される第1部材と、前記第1部材と対向して配置された第2部材との間を封止するシール構造であって、
前記第1部材と接触して配置された金属プレートと、
前記金属プレートと前記第2部材とに接触して配置された樹脂製の封止材と、
を有し、
前記金属プレート及び前記封止材により前記第1部材と前記第2部材との間を封止するシール構造。 - 前記金属プレートは、前記封止材から離れた位置で前記第2部材に接触して固定されている請求項1に記載のシール構造。
- 第2部材は冷却機構により冷却されている請求項1又は請求項2に記載のシール構造。
- 金属プレートは、前記ヒータから前記封止材への輻射熱を遮蔽するように配置されている請求項1に記載のシール構造。
- 前記ヒータはランプヒータを含む、請求項1~4の何れか1項に記載のシール構造。
- 前記ヒータは抵抗ヒータを含む、請求項5に記載のシール構造。
- 前記第1部材は、前記ヒータと基板の処理室との間に設けられ、前記ヒータからの輻射熱を処理室内に透過するプレートにより構成されている、請求項1~6の何れか1項に記載のシール構造。
- 前記第1部材は、前記プレートと、前記金属プレートと接触する接触部とにより構成されている、請求項7に記載のシール構造。
- 前記シール構造は、前記第1部材の上方に形成され第1ガスが供給される第1バッファ空間と、第1部材と第2部材の間に形成され第2ガスが供給される第2バッファ空間との間を封止するように構成されている、請求項1~8の何れか1項に記載のシール構造。
- 前記シール構造は、減圧された前記第1バッファ空間と減圧された前記第2バッファ空間との間を封止するように構成されている、請求項9に記載のシール構造。
- 前記第1部材と前記第2部材は、互いに非接触に配置されている、請求項1~10の何れか1項に記載のシール構造。
- 前記第2部材は金属で構成されている、請求項1~11の何れか1項に記載のシール構造。
- 前記第1部材は非金属で構成されている、請求項1~12の何れか1項に記載のシール構造。
- 前記第1部材の少なくとも一部は、透明材料で構成されている、請求項13に記載のシール構造。
- 前記第1部材は、前記ヒータの輻射熱を透過する透明材料で形成された透明部と、前記ヒータの輻射熱の透過を妨げる不透明材料で形成された不透明部と、によって構成される、請求項14に記載のシール構造。
- 前記金属プレートは前記不透明部と接触するように配置されている、請求項15に記載のシール構造。
- 前記金属プレートの厚さは、0.1~1.0mmの範囲の所定の値である、請求項1~16の何れか1項に記載のシール構造。
- 基板を処理する処理室と、
前記処理室内を加熱するように構成されたヒータと、
前記ヒータによって加熱される第1部材と、
前記第1部材と対向して配置された第2部材と、
前記第1部材と第2部材の間を封止するシール構造と、を備え、
前記シール構造は、
前記第1部材と接触して配置された金属プレートと、
前記金属プレートと前記第2部材とに接触して配置された樹脂製の封止材と、
を有し、
前記第1部材と前記第2部材との間が、前記金属プレート及び前記封止材により封止されている、基板処理装置。 - 基板処理装置の処理室に基板を搬入する工程と、
ヒータにより前記基板を加熱する工程と、
を有し、
前記基板処理装置は、
前記ヒータによって加熱される第1部材と、
前記第1部材と対向して配置された第2部材と、
前記第1部材と第2部材の間を封止するシール構造と、を備え、
前記シール構造は、
前記第1部材と接触して配置された金属プレートと、
前記金属プレートと前記第2部材とに接触して配置された樹脂製の封止材と、
を有し、
前記第1部材と前記第2部材との間が、前記金属プレート及び前記封止材により封止されている、半導体装置の製造方法。 - 前記処理室内に第1ガスと第2ガスを供給する工程を有し、
前記シール構造は、前記第1部材の上方に形成され第1ガスが供給される第1バッファ空間と、前記第1部材と前記第2部材の間に形成され第2ガスが供給される第2バッファ空間との間を封止するように構成されている、請求項19に記載の半導体装置の製造方法。
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JPH05149433A (ja) * | 1991-11-25 | 1993-06-15 | Kobe Steel Ltd | 半導体製造装置用真空チヤンバのシール構造 |
JP2003124206A (ja) * | 2001-10-18 | 2003-04-25 | Tokyo Electron Ltd | 熱処理装置 |
JP2005183645A (ja) * | 2003-12-19 | 2005-07-07 | Dainippon Screen Mfg Co Ltd | 熱処理装置 |
JP2008177524A (ja) * | 2006-10-13 | 2008-07-31 | Tokyo Electron Ltd | 熱処理装置 |
JP2009117373A (ja) * | 1997-01-29 | 2009-05-28 | Foundation For Advancement Of International Science | プラズマ装置 |
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JPH05149433A (ja) * | 1991-11-25 | 1993-06-15 | Kobe Steel Ltd | 半導体製造装置用真空チヤンバのシール構造 |
JP2009117373A (ja) * | 1997-01-29 | 2009-05-28 | Foundation For Advancement Of International Science | プラズマ装置 |
JP2003124206A (ja) * | 2001-10-18 | 2003-04-25 | Tokyo Electron Ltd | 熱処理装置 |
JP2005183645A (ja) * | 2003-12-19 | 2005-07-07 | Dainippon Screen Mfg Co Ltd | 熱処理装置 |
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