WO2021181565A1 - 基板処理装置、半導体装置の製造方法及びプログラム - Google Patents
基板処理装置、半導体装置の製造方法及びプログラム Download PDFInfo
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- WO2021181565A1 WO2021181565A1 PCT/JP2020/010543 JP2020010543W WO2021181565A1 WO 2021181565 A1 WO2021181565 A1 WO 2021181565A1 JP 2020010543 W JP2020010543 W JP 2020010543W WO 2021181565 A1 WO2021181565 A1 WO 2021181565A1
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- processing
- substrate
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- 239000000758 substrate Substances 0.000 title claims description 85
- 239000004065 semiconductor Substances 0.000 title claims description 10
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- 229910052802 copper Inorganic materials 0.000 description 3
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Images
Classifications
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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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/321—Radio frequency generated discharge the radio frequency energy being inductively coupled to the plasma
-
- 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
- H01J37/3244—Gas supply means
- H01J37/32449—Gas control, e.g. control of the gas flow
-
- 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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF discharge
-
- 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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF discharge
- H01J37/32183—Matching circuits
-
- 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
- H01J37/32532—Electrodes
- H01J37/32541—Shape
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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
- H01J37/32532—Electrodes
- H01J37/32559—Protection means, e.g. coatings
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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
- H01J37/32532—Electrodes
- H01J37/32568—Relative arrangement or disposition of electrodes; moving means
-
- 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
- H01J37/32623—Mechanical discharge control means
- H01J37/32651—Shields, e.g. dark space shields, Faraday shields
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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
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
-
- 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
- H01L21/04—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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
Definitions
- This disclosure relates to a substrate processing apparatus, a manufacturing method and a program of a semiconductor apparatus.
- a step of performing a predetermined process such as an oxidation process or a nitriding process on the substrate may be performed.
- Patent Document 1 discloses that a pattern surface formed on a substrate is modified using a plasma-excited processing gas.
- Japanese Unexamined Patent Publication No. 2014-75579 discloses that a pattern surface formed on a substrate is modified using a plasma-excited processing gas.
- the shape of the processing container in which the processing chamber in which the substrate is arranged varies, the position of the spiral electrode that generates plasma surrounding the processing container varies, the strength of the electromagnetic field generated from the electrode varies, and the substrate.
- the plasma distribution in the processing container may not be the desired distribution along the circumferential direction of the processing container due to the difference in the processing conditions for processing.
- the substrate processing apparatus includes a processing container having a cylindrical portion in which a processing chamber in which the substrate is arranged is formed, a gas supply unit for supplying a processing gas to the processing chamber, and a gas supply unit.
- An electrode is spirally provided so as to surround the processing container from the outside of the tubular portion of the processing container, and high-frequency power is supplied to plasma-excite the processing gas, and the electrode in the radial direction of the tubular portion. Is provided with a moving portion that moves the gas relative to the processing container.
- the plasma distribution in the processing chamber can be made to be a desired distribution along the circumferential direction of the processing container.
- FIGS. 1 to 7. An example of the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 7.
- the arrow H shown in each figure is the vertical direction and indicates the vertical direction of the device
- the arrow W is the horizontal direction and indicates the width direction of the device
- the arrow D is the horizontal direction and indicates the depth direction of the device.
- the substrate processing apparatus 100 is configured to mainly perform an oxidation treatment on a film formed on the substrate.
- the substrate processing apparatus 100 includes a processing furnace 202 for plasma processing the wafer 200.
- the processing furnace 202 is provided with a processing container 203 that constitutes the processing chamber 201.
- the processing container 203 includes a dome-shaped upper container 210, which is a first container, and a bowl-shaped lower container 211, which is a second container.
- the substrate processing apparatus 100 includes a base plate 248 that surrounds the upper end of the lower container 211 and has a through hole formed therein.
- the upper container 210 has a cylindrical cylindrical portion (cylindrical portion) 210a extending in the vertical direction, and 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-metallic 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.
- the wafer 200 is an example of a substrate.
- 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 through the carry-in outlet 245 using a transport mechanism (not shown), or the wafer 200 is carried out to the outside of the processing chamber 201. It is configured so that it can be used.
- the gate valve 244 is configured to be a sluice valve that maintains the airtightness of 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 in 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 refers to 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 substantially the same.
- the susceptor 217 as a substrate mounting portion on which the wafer 200 is mounted is arranged in the center of the bottom side of the processing chamber 201.
- 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 about 750 ° C. when electric power is supplied.
- 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. When the susceptor 217 is lowered by the susceptor elevating mechanism 268, the wafer push-up pin 266 is configured to penetrate the through hole 217a in a non-contact state with the susceptor 217.
- the susceptor 217 and the heater 217b constitute the substrate mounting portion according to the present embodiment.
- the gas supply unit 230 is provided above the processing chamber 201.
- the gas supply head 236 is provided above the processing chamber 201, that is, above the upper container 210.
- the gas supply head 236 includes a cap-shaped lid 233, a gas introduction port 234, a buffer chamber 237, an opening 238, a shielding plate 240, and a gas outlet 239, and supplies the reaction gas to the processing chamber 201. It is configured so that it can be done.
- the gas inlet 234 is supplied with a downstream end of an oxygen-containing gas supply pipe 232a for supplying oxygen (O 2 ) gas as an oxygen-containing gas and a hydrogen-containing gas supply for supplying hydrogen (H 2) gas as a hydrogen-containing gas.
- the downstream end of the pipe 232b and the inert gas supply pipe 232c for supplying an argon (Ar) gas as an inert gas are connected so as to merge.
- the oxygen-containing gas supply pipe 232a is provided with an O 2 gas supply source 250a, a mass flow controller (MFC) 252a as a flow rate control device, and a valve 253a as an on-off valve in this order from the upstream side.
- the hydrogen-containing gas supply pipe 232b is provided with an H 2 gas supply source 250b, an MFC 252b, and a valve 253b in this order from the upstream side.
- the inert gas supply pipe 232c is provided with an Ar gas supply source 250c, an MFC 252c, and a valve 253c in this order from the upstream side.
- 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 merge, and is connected to the upstream end of the gas introduction port 234.
- gas supply head 236 (lid 233, gas introduction port 234, buffer chamber 237, opening 238, shielding plate 240, gas outlet 239), oxygen-containing gas supply pipe 232a, hydrogen-containing gas supply pipe 232b, inert
- the gas supply section 230 (gas supply system) according to the present embodiment is configured by the gas supply pipes 232c, MFC252a, 252b, 252c, and valves 253a, 253b, 253c, 243a.
- the exhaust unit 228 is provided below the processing chamber 201 so as to face the carry-in outlet 245 in the horizontal direction.
- a gas exhaust port 235 for exhausting the reaction gas from 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) 242 as a pressure regulator (pressure regulator), a valve 243b as an on-off valve, and a vacuum pump 246 as a vacuum exhaust device in order from the upstream side.
- APC Auto Pressure Controller
- the gas exhaust port 235, the gas exhaust pipe 231 and the APC 242, and the valve 243b constitute the exhaust unit 228 according to the present embodiment.
- the vacuum pump 246 may be included in the exhaust unit.
- the plasma generation unit 216 is mainly provided on the outside of the outer wall of the cylindrical portion 210a of the upper container 210.
- a spiral resonance coil 212 is provided on the outer periphery 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 spiral resonance coil is provided so as to surround the processing container 203 from the outside (the side away from the center of the cylindrical portion 210a) in the radial direction of the cylindrical portion 210a (hereinafter, “container radial direction”).
- the resonance coil 212 is an example of an electrode.
- 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 supplied high frequency traveling wave and reflected wave.
- the reflected wave power monitored by the RF sensor 272 is input to the matching device 274, and the matching device 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 high-frequency power supply 273 includes a power supply control means (control circuit) including a high-frequency oscillation circuit and a preamplifier for defining an oscillation frequency and an output, and an amplifier (output circuit) for amplifying to a predetermined output.
- the power supply control means controls the amplifier based on preset frequency and power output conditions through the control panel.
- the amplifier supplies constant high frequency power to the resonant coil 212 via a transmission line.
- 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 (1 times, 2 times, ...) Of one wavelength at a predetermined frequency of the high frequency power supplied from the high frequency power supply 273.
- the substrate processing apparatus 100 includes 273 high-frequency power supplies that supply high-frequency power having a wavelength that is an integral multiple of the electrical length of the resonant coil 212 to the electrodes.
- the resonant coil 212 is 0.01 to 10 gauss by, for example, 800 kHz to 50 MHz and 0.5 to 5 kW high frequency power. It has an effective cross-sectional area of 50 to 300 mm 2 and a coil diameter of 200 to 500 mm so that a magnetic field of about 2 to can be generated, and 2 to 2 to the outer peripheral side of the room forming the plasma generation space 201a (see FIG. 2). It is wound about 60 times.
- the frequency is 13.56 MHz or 27.12 MHz.
- the frequency of the high frequency power is set to 27.12 MHz, and the electrical length of the resonance coil 212 is set to the length of one wavelength (about 11 meters).
- the winding pitch of the resonance coil 212 is provided at equal intervals of, for example, 24.5 mm.
- the winding diameter (diameter) of the resonance coil 212 is set to be larger than the diameter of the wafer 200.
- the diameter of the wafer 200 is set to 300 mm, and the winding diameter of the resonance coil 212 is provided so as to be 500 mm, which is larger than the diameter of the wafer 200.
- a copper pipe, a thin copper plate, an aluminum pipe, a thin aluminum plate, a material in which copper or aluminum is vapor-deposited on a polymer belt, or the like is used as the material constituting the resonance coil 212.
- Both ends of the resonant coil 212 are electrically grounded, and at least one of them is a movable tap 213 to fine-tune the electrical length of the resonant coil during the initial installation of the device or when the processing conditions are changed. It is grounded through.
- Reference numeral 214 in FIG. 1 indicates the other fixed ground.
- a feeding portion is configured by a movable tap 215 between the grounded ends of the resonant coil 212.
- the shielding plate 224 covers the resonance coil 212 from the outside in the radial direction of the container, shields the electric field generated by the resonance coil 212, and holds the capacitance component (C component) necessary for forming the resonance circuit between the resonance coil 212 and the resonance coil 212. It is provided to form in.
- the shielding plate 224 is an example of a shielding portion.
- the shielding plate 224 is formed by using a conductive material such as an aluminum alloy, and is connected to a cylindrical main body 225 that covers the resonance coil 212 from the outside in the radial direction of the container and the upper end of the main body 225. It also has an upper flange 226 extending inward in the radial direction of the container. Further, the shielding plate 224 has a lower flange 227 connected to the lower end of the main body 225 and extending inward in the container radial direction.
- the resonance coil 212 described above is supported by a plurality of supports 229 vertically erected on the upper end surface of the lower flange 227. Further, a support plate 256 is provided which is placed on the base plate 248 and has a through hole through which the upper container 210 passes, and the shielding plate 224 is supported from below by the support plate 256. In other words, the support plate 256 supports the shielding plate 224 and the resonance coil 212 from below.
- the support plate 256 is an example of a support portion.
- the shielding plate 224 is arranged at a distance of about 5 to 150 mm from the outer circumference of the resonance coil 212.
- the resonance coil 212, the RF sensor 272, and the matching device 274 constitute the plasma generation unit 216 according to the present embodiment.
- the high frequency power supply 273 may be included as the plasma generation unit.
- the plasma generation circuit composed of the resonance coil 212 is composed of the parallel resonance circuit of RLC.
- the resonance frequency of the actual resonance coil 212 fluctuates slightly depending on the excitation state and the like.
- the matching unit 274 is used from the resonance coil 212 when the plasma detected by the RF sensor 272 is generated. Based on the reflected wave power, the impedance or output frequency of the high frequency power supply 273 is increased or decreased so that the reflected wave power is minimized.
- the resonance coil 212 in the present embodiment is supplied with high-frequency power at the actual resonance frequency of the resonance coil containing the plasma (or the actual resonance coil containing the plasma). (Because the high frequency power is supplied so as to match the impedance of), a standing wave is formed in which the phase voltage and the antiphase voltage are always offset.
- the electrical length of the resonance coil 212 is the same as the wavelength of high frequency power, the highest phase current is generated at the electrical midpoint (node of zero voltage) of the coil. Therefore, in the vicinity of the electrical midpoint, there is almost no capacitive coupling with the processing chamber wall or the susceptor 217, and a donut-shaped inductive plasma having an extremely low electrical potential is formed.
- the moving unit 310 is configured to move the resonance coil 212 with respect to the processing container 203. First, the purpose of moving the resonance coil 212 with respect to the processing container 203 will be described.
- the plasma distribution in the processing chamber 201 is desirable because of variations in the position of the resonance coil 212, variations in the shape of the processing container 203, variations in the strength of the electromagnetic field generated from the resonance coil 212, and differences in the processing conditions for processing the wafer 200. May not be distributed. Specifically, the plasma distribution in the processing chamber 201 may not be uniform along the circumferential direction of the processing container 203. That is, the film formed on the wafer 200 may not be uniformly oxidized or the like.
- the distance between the resonance coil 212 and the processing container 203 (hereinafter, may be referred to as “distance between coil containers”) can be changed to the processing container 203. It becomes different in the circumferential direction of.
- the plasma distribution in the processing container 203 is changed so that the plasma distribution becomes uniform along the circumferential direction of the processing container 203.
- the moving portion 310 for moving the resonance coil 212 with respect to the processing container 203 is provided on the upper surface 248a of the base plate 248, and is provided from the first moving portion 320 and the second moving portion 370. It is configured.
- the first moving unit 320 moves the resonance coil 212 and the shielding plate 224 in the device depth direction in the container radial direction
- the second moving unit 370 moves the resonance coil 212 and the shielding plate 224 in the container radial direction and the device depth. It is designed to move in the width direction of the device orthogonal to the direction.
- the device depth direction is an example of one direction
- the device width direction is an example of another direction.
- the first moving portion 320 is arranged on the front side (lower side of the paper surface) in the device depth direction and one side (left side of the paper surface) in the device width direction in the base plate 248. .. As shown in FIG. 5, the first moving portion 320 moves the movable portion 322 that is indirectly attached to the resonance coil 212 and moves integrally with the resonance coil 212, and the movable portion 322 that moves by operating. It includes an adjusting unit 332, which is a mechanism for adjusting the position of the movable unit 322, and a driving unit 340, which is a stepping motor.
- "moving as one" means moving without changing the relative relationship.
- the movable portion 322 includes a main body portion 324 and a support portion 328 supported by the main body portion 324.
- the main body portion 324 has a rectangular parallelepiped base portion 324a extending in the device width direction and a plate-shaped extending portion 324b extending from the base portion 324a to one side in the device width direction.
- the lower end portion of the base portion 324a is inserted into the guide groove 248b formed in the upper surface 248a of the base plate 248.
- the main body 324 is guided by the guide groove 248b and moves in the depth direction of the device.
- a guide groove 326 extending in the width direction of the device is formed on the upper surface of the base portion 324a.
- the extension portion 324b has a plate thickness direction as the device depth direction, and has a rectangular shape extending in the device width direction when viewed from the device depth direction.
- a female screw 330 penetrating in the depth direction of the device is formed in the extension portion 324b.
- the support portion 328 has a rectangular parallelepiped base portion 328a extending in the width direction of the device and a cylindrical columnar portion 328b protruding upward from the base portion 328a.
- the portion of the base portion 328a excluding the upper end portion is inserted into the guide groove 326 formed on the upper surface of the base portion 324a of the main body portion 324.
- the support portion 328 is guided by the guide groove 326 and moves in the device width direction.
- the support plate 256 is formed with a protruding portion 258 that protrudes from the outer peripheral surface 256a and has the vertical direction as the plate thickness direction. Further, a through hole 258a penetrating in the vertical direction is formed in the protruding portion 258. The columnar portion 328b of the support portion 328 is inserted into the through hole 258a.
- the adjusting unit 332 includes a screw shaft 334 extending in the depth direction of the device and a pair of support plates 336 that rotatably support the screw shaft 334.
- a male screw 334a is formed on the outer peripheral surface of the screw shaft 334, and the male screw 334a of the screw shaft 334 is tightened to the female screw 330 of the main body 324.
- a known ball screw structure is formed including a screw shaft 334, a female screw 330, a ball (not shown), and the like. Further, the drive unit 340 is provided so as to rotate the screw shaft 334.
- the drive unit 340 rotates the screw shaft 334 in one direction, so that the first moving unit 320 moves the resonance coil 212 and the shielding plate 224 to the back side in the device depth direction with respect to the processing container 203. .. Specifically, when the drive unit 340 rotates the screw shaft 334 in one direction, the main body unit 324 and the support unit 328 move to the inner side in the device depth direction. Further, when the main body portion 324 and the support portion 328 move to the depth side in the device depth direction, the resonance coil 212 and the shielding plate 224 move to the depth side in the device depth direction via the support plate 256.
- the first moving unit 320 moves the resonance coil 212 and the shielding plate 224 toward the front side in the device depth direction with respect to the processing container 203.
- the main body unit 324 and the support unit 328 move toward the front side in the device depth direction.
- the resonance coil 212 and the shielding plate 224 move to the front side in the device depth direction via the support plate 256. In this way, the resonance coil 212 and the shielding plate 224 move together.
- the second moving portion 370 is arranged on the base plate 248 on the back side (upper side of the paper surface) in the device depth direction and on one side (left side of the paper surface) in the device width direction.
- the second moving portion 370 moves the movable portion 372 that is indirectly attached to the resonance coil 212 and moves integrally with the resonance coil 212, and the movable portion 372 that moves by operating. It includes an adjusting unit 382, which is a mechanism for adjusting the position of the movable unit 372, and a driving unit 390, which is a stepping motor.
- the movable portion 372 includes a main body portion 374 and a support portion 378 supported by the main body portion 374.
- the main body portion 374 has a rectangular parallelepiped base portion 374a extending in the device depth direction and a plate-shaped extending portion 374b extending from the base portion 374a to the depth side in the device depth direction.
- the lower end portion of the base portion 374a is inserted into the guide groove 248c formed in the upper surface 248a of the base plate 248.
- the main body portion 374 is guided by the guide groove 248c and moves in the device width direction.
- a guide groove 376 extending in the depth direction of the device is formed on the upper surface of the base portion 374a.
- extension portion 374b has a rectangular shape extending in the device depth direction when viewed from the device width direction, with the plate thickness direction as the device width direction.
- a female screw 380 penetrating in the width direction of the device is formed in the extension portion 374b.
- the support portion 378 has a rectangular parallelepiped base portion 378a extending in the depth direction of the device and a cylindrical columnar portion 378b protruding upward from the base portion 378a.
- the portion of the base portion 378a excluding the upper end portion is inserted into the guide groove 376 formed on the upper surface of the base portion 374a of the main body portion 374.
- the support portion 378 is guided by the guide groove 376 and moves in the depth direction of the device.
- the support plate 256 is formed with a protruding portion 260 that protrudes from the outer peripheral surface 256a and has the vertical direction as the plate thickness direction. Further, the protruding portion 260 is formed with a through hole 260a penetrating in the vertical direction. The columnar portion 378b of the support portion 378 is inserted into the through hole 260a.
- the adjusting unit 382 includes a screw shaft 384 extending in the width direction of the device and a pair of support plates 386 that rotatably support the screw shaft 384.
- a male screw 384a is formed on the outer peripheral surface of the screw shaft 384, and the male screw 384a of the screw shaft 384 is tightened to the female screw 380 of the main body 374.
- a known ball screw structure is formed including a screw shaft 384, a female screw 380, a ball (not shown), and the like. Further, the drive unit 390 is provided so as to rotate the screw shaft 384.
- the drive unit 390 rotates the screw shaft 384 in one direction, so that the second moving unit 370 moves the resonance coil 212 and the shielding plate 224 to one side in the device width direction with respect to the processing container 203. .. Specifically, when the drive unit 390 rotates the screw shaft 384 in one direction, the main body unit 374 and the support unit 378 move to one side in the device width direction. Further, when the main body portion 374 and the support portion 378 move to one side in the device width direction, the resonance coil 212 and the shielding plate 224 move to one side in the device width direction via the support plate 256.
- the second moving unit 370 moves the resonance coil 212 and the shielding plate 224 to the other side in the device width direction with respect to the processing container 203.
- the main body unit 374 and the support unit 378 move to the other side in the device width direction.
- the resonance coil 212 and the shielding plate 224 move to the other side in the device width direction via the support plate 256.
- the controller 221 connects the APC 242, the valve 243b and the vacuum pump 246 through the signal line A, the susceptor elevating mechanism 268 through the signal line B, the heater power adjusting mechanism 276 through the signal line C, and the signal line D.
- the gate valve 244 is controlled through the signal line E
- the RF sensor 272 the high frequency power supply 273 and the matching unit 274 are controlled through the signal line E
- the MFCs 252a to 252c and the valves 253a to 253c and 243a are controlled through the signal line F, respectively.
- the controller 221 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 input / output device 222 is an example of an input unit and a display unit.
- the input / output device 222 is input with an operation command and processing conditions as movement information for moving the resonance coil 212. Further, the input / output device 222 displays the amount of movement of the resonance coil 212 with respect to a predetermined reference position.
- the processing conditions input to the input / output device 222 and the displayed movement amount of the resonance coil 212 will be described together with the actions described later.
- the storage device 221c is composed of, for example, a flash memory, an HDD (Hard Disk Drive), or the like.
- a control program for controlling the operation of the substrate processing apparatus, a program recipe in which the procedures and conditions for substrate processing described later are described, and the like are readablely stored.
- the storage device 221c is an example of a storage unit.
- the process recipe is a combination of the process recipes so that the CPU 221a 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 may include only the program recipe alone, the 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 storage device 221c stores a plurality of processing conditions as movement information for moving the resonance coil 212 and the positions of the resonance coil 212 corresponding to each processing condition with respect to the processing container 203.
- the processing conditions are supplied to the temperature of the wafer 200 to be processed, the pressure of the processing chamber 201, the type of processing gas for processing the wafer 200, the flow rate of the processing gas for processing the wafer 200, and the resonance coil 212. Includes at least one condition in the power.
- the position of the resonance coil 212 with respect to the processing container 203 is derived as follows, and this position is stored in the storage device 221c.
- the plasma distribution is confirmed by changing the positions of the resonance coil 212 with respect to the processing container 203 at a plurality of locations for each processing condition.
- the position of the resonance coil 212 with respect to the processing container 203 which can be made uniform along the circumferential direction of the processing container 203 in the processing container 203, is derived, and this position is stored in the storage device 221c.
- the I / O port 221d includes the above-mentioned MFC 252a to 252c, valves 253a to 253c, 243a, 243b, gate valve 244, APC valve 242, vacuum pump 246, RF sensor 272, high frequency power supply 273, matching unit 274, and susceptor elevating mechanism 268. , Heater power adjustment mechanism 276, drive unit 340, 390, etc.
- 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.
- the CPU 221a is an example of a control unit.
- the CPU 221a adjusts the opening degree of the APC valve 242, opens and closes the valve 243b, and starts 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. Stopping, ascending / descending operation of the susceptor elevating mechanism 268 through the signal line B, adjusting the amount of power supplied to the heater 217b by the heater power adjusting mechanism 276 through the signal line C (temperature adjusting operation), and performing the operation of adjusting the amount of power supplied to the heater 217b through the signal line D of the gate valve 244.
- Opening / closing operation, operation of RF sensor 272, matching unit 274 and high frequency power supply 273 through signal line E, flow rate adjustment operation of various gases by MFC 252a to 252c through signal line F, opening / closing operation of valves 253a to 253c, 243a, etc. Is configured to control.
- the controller 221 is stored in an external storage device (for example, magnetic tape, magnetic disk such as flexible disk or hard disk, optical disk such as CD or DVD, magneto-optical disk such as MO, semiconductor memory such as USB memory or memory card) 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 computer-readable recording media. Hereinafter, these are collectively referred to simply as a recording medium. In the present specification, when the term recording medium is used, it may include only the storage device 221c alone, it may include only the external storage device 223 alone, or it may include both of them.
- the program may be provided to the computer by using a communication means such as the Internet or a dedicated line without using the external storage device 223.
- the method for manufacturing a semiconductor device according to the present embodiment is carried out using the above-mentioned substrate processing device 100 as one step of a manufacturing process for a semiconductor device such as a flash memory.
- the operation of each part constituting the substrate processing apparatus 100 is controlled by the CPU 221a.
- a trench having at least a surface made of a silicon layer and having an uneven portion having a high aspect ratio is formed in advance.
- the silicon layer exposed on the inner wall of the trench is subjected to an oxidation treatment as a treatment using plasma.
- the resonance coil 212 is arranged at a predetermined reference position.
- the wafer 200 is carried into the processing chamber 201. Specifically, the susceptor elevating mechanism 268 shown in FIG. 1 lowers the susceptor 217 to the transport position of the wafer 200, and causes the wafer push-up pin 266 to penetrate through the through hole 217a of the susceptor 217.
- the gate valve 244 is opened, and the wafer 200 is carried from the vacuum transfer chamber adjacent to the processing chamber 201 into the processing chamber 201 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 protruding from the surface of the susceptor 217.
- the wafer transfer mechanism is retracted to the outside of the processing chamber 201, the gate valve 244 is closed, and the processing chamber 201 is sealed.
- 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 first moving unit 320 moves the resonance coil 212 in the depth direction of the device based on the movement information of the resonance coil 212 input to the input / output device 222 by the operator, and the second moving unit 370. Moves the resonant coil 212 in the width direction of the device.
- the operator inputs the processing conditions as the movement information of the resonance coil 212 to the input / output device 222.
- the processing conditions are supplied to the temperature of the wafer 200 to be processed, the pressure of the processing chamber 201, the type of processing gas for processing the wafer 200, the flow rate of the processing gas for processing the wafer 200, and the resonance coil 212. Includes at least one of the power sources.
- the drive unit 340 and the drive unit 390 operate based on the position of the resonance coil 212 stored in the storage device 221c with respect to the processing container 203 corresponding to each processing condition.
- the drive unit 340 rotates the screw shaft 334.
- the main body portion 324 and the support portion 328 move in the device depth direction.
- the resonance coil 212 and the shielding plate 224 move in the device depth direction via the support plate 256. Since the support portion 328 is guided by the guide groove 326 and moves in the device width direction, the position of the resonance coil 212 in the device width direction is not restricted by the operating drive unit 340.
- the drive unit 390 rotates the screw shaft 384.
- the main body portion 374 and the support portion 378 move in the device width direction.
- the resonance coil 212 and the shielding plate 224 move in the device width direction via the support plate 256. Since the support portion 378 is guided by the guide groove 376 and moves in the device depth direction, the position of the resonance coil 212 in the device depth direction is not regulated by the operating drive unit 390.
- the resonance coil 212 and the shielding plate 224 move based on the position of the resonance coil 212 with respect to the processing container 203 corresponding to each processing condition. Then, while the wafer 200 is being processed in the processing chamber 201, the drive units 340 and 390 are put into a non-operating state. In other words, while the wafer 200 is being processed in the processing chamber 201, the relative relationship between the resonance coil 212 and the processing container 203 is maintained.
- the operator directly inputs the amount of movement of the resonance coil 212 with respect to the reference position (or the position information of the resonance coil 212 after movement with respect to the processing container 203) from the input / output device 222 as movement information.
- the drive unit 340 and the drive unit 390 may be operated based on the input movement information.
- the temperature raising / vacuum exhaust step S300 the temperature of the wafer 200 carried into the processing chamber 201 is raised.
- the heater 217b shown in FIG. 1 is preheated, and the wafer 200 is heated by holding the wafer 200 on the susceptor 217 in which the heater 217b is embedded.
- the wafer 200 is heated so as to have a temperature of 600 ° C.
- the processing chamber 201 is evacuated through the gas exhaust pipe 231 by the vacuum pump 246, 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 S700, which will be described later, is completed.
- reaction gas supply step S400 In the reaction gas supply step S400, supply of O 2 gas, which is an oxygen-containing gas, and H 2 gas, which is a hydrogen-containing gas, is started as the reaction gas. Specifically, the valves 253a and 253b shown in FIG. 1 are opened, and the supply of O 2 gas and H 2 gas to the processing chamber 201 is started while the flow rate is controlled by the MFC 252a and 252b. At this time, the flow rate of the O 2 gas is set to a predetermined value within the range of, for example, 20 to 2000 sccm. Further, the flow rate of the H 2 gas is set to a predetermined value in the range of, for example, 20 to 1000 sccm.
- the exhaust gas of the processing chamber 201 is controlled by adjusting the opening degree of the APC 242 so that the pressure of the processing chamber 201 becomes a predetermined pressure in the range of, for example, 1 to 250 Pa. In this way, while appropriately exhausting the processing chamber 201, the supply of O 2 gas and H 2 gas is continued until the end of the plasma processing step S500 described later.
- the plasma processing step S500 After the pressure in the processing chamber 201 stabilizes, in the plasma processing step S500, supply of high-frequency power to the resonance coil 212 shown in FIG. 1 is started from the high-frequency power supply 273 via the RF sensor 272.
- the high frequency power supply 273 supplies high frequency power of 27.12 MHz to the resonance coil 212.
- the high frequency power supplied to the resonance coil 212 is, for example, a predetermined power in the range of 100 to 5000 W.
- a high-frequency electric field is formed in the plasma generation space 201a (see FIG. 2) to which the O 2 gas and the H 2 gas are supplied, and the electric field corresponds to the electrical midpoint of the resonance coil 212 of the plasma generation space 201a.
- a donut-shaped induced plasma having the highest plasma density is excited at the height position.
- Plasma-like O 2 gas and H 2 gas are dissociated to generate reactive species such as oxygen radicals containing oxygen (oxygen active species) and oxygen ions, hydrogen radicals containing hydrogen (hydrogen active species) and hydrogen ions. ..
- the resonance coil 212 is arranged at a position corresponding to the input processing conditions.
- the plasma distribution in the processing chamber 201 can be made uniform along the circumferential direction of the processing container 203.
- radicals and ions generated by inductive plasma are supplied into the trench on the surface of the wafer 200 to the wafer 200 held on the susceptor 217 in the substrate processing space 201b (see FIG. 2).
- the supplied radicals and ions react with the side walls of the trench to modify the surface silicon layer into a silicon oxide layer.
- the power supply from the high frequency power supply 273 is stopped, and the plasma discharge in the processing chamber 201 is stopped. Further, the valves 253a and 253b are closed to stop the supply of the O 2 gas and the H 2 gas to the processing chamber 201. As a result, the plasma processing step S500 is completed.
- the drive units 340 and 390 are operated to move the resonance coil 212 with respect to the processing container 203.
- the plasma distribution (plasma density distribution) in the processing chamber 201 can be made uniform along the circumferential direction of the processing container 203.
- the plasma distribution in the processing chamber 201 can be made a desired distribution.
- the first moving portion 320 of the moving portion 310 moves the resonance coil 212 with respect to the processing container 203 in the device depth direction.
- the second moving unit 370 of the moving unit 310 moves the resonance coil 212 with respect to the processing container 203 in the device width direction.
- the first moving portion 320 is a movable portion 322 that is indirectly attached to the resonance coil 212 and moves integrally with the resonance coil 212, and a movable portion 322 that moves the movable portion 322. It is provided with an adjusting unit 332 which is a mechanism for adjusting the position of.
- the second moving portion 370 is a mechanism that is indirectly attached to the resonance coil 212 and moves integrally with the resonance coil 212, and a mechanism that moves the movable portion 372 to adjust the position of the movable portion 372.
- the adjustment unit 382 is provided.
- the first moving unit 320 includes a driving unit 340 for rotating the screw shaft 334 of the adjusting unit 332, and the second moving unit 370 is a driving unit for rotating the screw shaft 384 of the adjusting unit 382. It is equipped with 390.
- the resonance coil 212 can be moved with respect to the processing container 203 without manually turning the screw shafts 334 and 384.
- the board processing device 100 controls the input / output device 222 to which the movement information for moving the resonance coil 212 is input and the drive units 340 and 390, and the movement input to the input / output device 222. It includes a CPU 221a that rotates the screw shafts 334 and 384 of the adjusting units 332 and 382 based on the information. Thereby, for example, the resonance coil 212 can be moved with respect to the processing container 203 only by the operator inputting the movement amount.
- the substrate processing device 100 includes a storage device 221c that stores processing conditions as movement information and relative positions of the resonance coil 212 corresponding to each processing condition with respect to the processing container 203, and the CPU 221a is an input / output device 222.
- the drive units 340 and 390 are controlled based on the processing conditions as the movement information input to the storage device 221c and the relative positions of the resonance coil 212 corresponding to each processing condition stored in the storage device 221c with respect to the processing container 203.
- the generated plasma distribution or the plasma distribution obtained for each processing condition differs depending on the processing conditions. Therefore, by storing the relative position of the resonance coil 212 with respect to the processing container 203 for each processing condition, the plasma distribution in the processing chamber 201 can be made a desired distribution for each processing condition.
- the processing conditions for processing the wafer 200 input to the input / output device 222 are the temperature of the wafer 200 to be processed, the pressure in the processing chamber 201, the type of processing gas for processing the wafer 200, and the wafer. Includes at least one condition in the flow rate of the processing gas processing 200 and the power supplied to the resonant coil 212. Since the generated plasma distribution changes depending on such processing conditions, the plasma distribution in the processing chamber 201 can be made into a desired distribution by storing the position of the resonance coil 212 with respect to the processing container 203 for each such processing condition. can do.
- the drive units 340 and 390 are in the non-operating state while the wafer 200 is being processed in the processing chamber 201.
- the relative relationship between the resonance coil 212 and the processing container 203 is maintained. Thereby, the plasma distribution of the processing chamber 201 can be stabilized.
- the resonance coil 212 and the shielding plate 224 move integrally. In other words, the relative positions of the resonant coil 212 and the shielding plate 224 do not change. Therefore, it is possible to suppress the disturbance of the plasma distribution generated by the resonance coil 212 due to the change in the position of the shielding plate.
- a support plate 256 for supporting the shielding plate 224 and the resonance coil 212 from below is provided, and by moving the support plate 256, the shielding plate 224 and the resonance coil 212 can be moved. There is. In this way, the shielding plate 224 and the resonance coil 212 can be moved only by moving the support plate 256.
- the input / output device 222 displays the amount of movement of the resonance coil 212 with respect to the reference position. Therefore, the operator can visually confirm the amount of movement of the resonance coil 212 with respect to the reference position. For example, the operator can manually fine-tune the position of the resonance coil 212 based on this amount of movement. can.
- the drive units 340 and 390 are operated to move the resonance coil 212 with respect to the processing container 203.
- the plasma distribution in the processing chamber 201 can be made uniform along the circumferential direction of the processing container 203.
- the plasma distribution in the processing chamber 201 can be made a desired distribution.
- the moving portion 410 of the substrate processing apparatus 400 according to the second embodiment is not provided on the upper surface 248a of the base plate 248, but is provided on the upper surface 226a of the upper flange 226 of the shielding plate 224. There is.
- the moving portion 410 is provided on the upper surface 226a of the upper flange 226 of the shielding plate 224, and is composed of the first moving portion 420 and the second moving portion 470.
- the first moving unit 420 moves the resonance coil 212 and the shielding plate 224 shown in FIG. 8 in the device depth direction with respect to the processing container 203
- the second moving unit 470 moves the resonance coil 212 and the shielding plate 224 shown in FIG. 8 in the device depth direction. Is moved in the width direction of the device with respect to the processing container 203.
- the first moving portion 420 includes an operating portion 430 arranged on the front side in the device depth direction on the upper surface 226a of the upper flange 226 of the shielding plate 224, and the upper surface of the upper flange 226 of the shielding plate 224. It is provided with an actuating portion 440 arranged on the inner side of the device in the depth direction of the 226a. Further, as shown in FIG. 8, the processing container 203 is provided with a disk-shaped disk portion 218 on the upper surface of the lid 233.
- the operating portion 430 includes a plate member 432 attached to the upper surface 218a of the disk portion 218, a plate member 434 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, and a bolt 436. , With a gauge of 438.
- the plate member 432 and the plate member 434 face each other in the device depth direction, and the plate thickness direction of the plate member 432 and the plate thickness direction of the plate member 434 are the device depth directions.
- a female screw 432a is formed on the plate member 432.
- the bolt 436 is fastened to the female screw 432a of the plate member 432 from the inside in the radial direction of the container, and the tip of the bolt 436 is abutted against the plate surface of the plate member 434.
- the gauge 438 is attached to the plate member 434, and the gauge 438 measures the distance between the plate member 432 and the plate member 434 in the device depth direction.
- the operating portion 440 includes a plate member 442 attached to the upper surface 218a of the disk portion 218, a plate member 444 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, a bolt 446, and a gauge 448. ..
- the plate member 442 and the plate member 444 face each other in the device depth direction, and the plate thickness direction of the plate member 442 and the plate thickness direction of the plate member 444 are the device depth directions.
- a female screw 442a is formed on the plate member 442.
- the bolt 446 is tightened to the female screw 442a of the plate member 442 from the inside in the radial direction of the container, and the tip of the bolt 446 is abutted against the plate surface of the plate member 444.
- the gauge 448 is attached to the plate member 444, and the gauge 448 measures the distance between the plate member 442 and the plate member 444 in the device depth direction.
- the second moving portion 470 includes an operating portion 480 arranged on one side in the device width direction on the upper surface 226a of the upper flange 226 of the shielding plate 224, and the upper surface of the upper flange 226 of the shielding plate 224.
- 226a includes an actuating portion 490 arranged on the other side in the device width direction.
- the operating portion 480 includes a plate member 482 attached to the upper surface 218a of the disk portion 218, a plate member 484 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, and the plate member 484. It includes a bolt 486 and a gauge 488.
- the plate member 482 and the plate member 484 face each other in the device width direction, and the plate thickness direction of the plate member 482 and the plate thickness direction of the plate member 484 are the device width directions.
- a female screw 482a is formed on the plate member 482.
- the bolt 486 is fastened to the female screw 482a of the plate member 482 from the inside in the radial direction of the container, and the tip of the bolt 486 is abutted against the plate surface of the plate member 484.
- the gauge 488 is attached to the plate member 484, and the gauge 488 measures the distance between the plate member 482 and the plate member 484 in the device width direction.
- the operating portion 490 includes a plate member 492 attached to the upper surface 218a of the disk portion 218, a plate member 494 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, a bolt 496, and a gauge 498. ..
- the plate member 492 and the plate member 494 face each other in the device width direction, and the plate thickness direction of the plate member 492 and the plate thickness direction of the plate member 494 are in the device width direction.
- a female screw 492a is formed on the plate member 492.
- the bolt 496 is fastened to the female screw 492a of the plate member 442 from the inside in the radial direction of the container, and the tip of the bolt 496 is abutted against the plate surface of the plate member 494.
- the gauge 498 is attached to the plate member 494, and the gauge 498 measures the distance between the plate member 492 and the plate member 494 in the device width direction.
- the action other than the action played by providing the drive unit 340 and 390 in the first embodiment is performed.
- the moving portion 510 of the substrate processing apparatus 500 is provided on the upper surface 226a of the upper flange 226 of the shielding plate 224, and the first moving portion 520 and the moving portion 510 are provided. It is composed of a second moving unit 570.
- the first moving unit 520 moves the resonance coil 212 and the shielding plate 224 shown in FIG. 11 in the depth direction of the device with respect to the processing container 203
- the second moving unit 570 moves the resonance coil 212 and the shielding plate 224 shown in FIG. 11 in the depth direction of the device. Is moved in the width direction of the device with respect to the processing container 203.
- the first moving portion 520 includes an operating portion 430 arranged on the front side in the device depth direction on the upper surface 226a of the upper flange 226 of the shielding plate 224, and the upper surface of the upper flange 226 of the shielding plate 224. It is provided with an actuating portion 540 arranged on the inner side of the device in the depth direction of the 226a.
- the operating portion 430 includes a plate member 432 attached to the upper surface 218a of the disk portion 218, a plate member 434 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, and a bolt 436. , With a gauge of 438.
- the operating portion 540 includes a plate member 542 attached to the upper surface 218a of the disk portion 218, a plate member 544 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, and a piston (plunger) urged by a compression coil spring. ) 546 and is provided.
- the plate member 542 and the plate member 544 face each other in the device depth direction, and the plate thickness direction of the plate member 542 and the plate thickness direction of the plate member 544 are the device depth directions.
- the piston 546 is arranged in a state of urging the plate member 542 and the plate member 544 in a direction away from each other.
- the second moving unit 570 includes an operating unit 480 and an operating unit 590 arranged on the other side of the upper surface 226a of the upper flange 226 of the shielding plate 224 in the device width direction.
- the operating portion 590 includes a plate member 592 attached to the upper surface 218a of the disk portion 218, a plate member 594 attached to the upper surface 226a of the upper flange 226 of the shielding plate 224, and the plate member 594. It is equipped with a piston (plunger) 596 urged by a compression coil spring.
- the plate member 592 and the plate member 594 face each other in the device width direction, and the plate thickness direction of the plate member 592 and the plate thickness direction of the plate member 594 are the device width directions.
- the piston 596 is arranged so as to urge the plate member 592 and the plate member 594 in a direction away from each other.
- an action other than the action played by providing the drive unit 340 and 390 is performed.
- the resonance coil 212 is moved relative to the processing container 203 by moving the resonance coil 212 with respect to the processing container 203, but the processing container 203 is moved with respect to the resonance coil 212. As a result, the resonance coil 212 may be moved relative to the processing container 203.
- the processing conditions include at least the relative positions of the resonance coil 212 and the wafer 200 to be processed in the axial direction (up and down direction of the device) of the cylindrical portion 210a of the processing container 203. You may be. Since the desired plasma distribution differs depending on such processing conditions, the plasma distribution in the processing chamber 201 can be made into a desired distribution by storing the position of the resonance coil 212 with respect to the processing container 203 for each such processing condition. Can be done.
- the processing conditions may include at least the type of wafer 200 to be processed. Since the desired plasma distribution differs depending on such processing conditions, the position of the resonance coil 212 with respect to the processing container 203 is stored for each such processing condition to make the plasma distribution in the processing chamber 201 a desired distribution. be able to.
- the processing conditions may include at least the processing time of the wafer 200 to be processed. Since the desired plasma distribution differs depending on such processing conditions, the position of the resonance coil 212 with respect to the processing container 203 is stored for each such processing condition to make the plasma distribution in the processing chamber 201 a desired distribution. be able to.
- the drive units 340 and 390 are in a non-operating state, but the drive unit is operated at a predetermined timing during the processing of the wafer 200. Therefore, the resonance coil 212 may be moved to a predetermined position of the resonance coil 212 with respect to the processing container 203.
- the plasma distribution in the processing chamber 201 can be made into a desired distribution by moving the resonance coil 212 during the treatment so as to compensate for the bias.
- the position adjusting step S200 is performed after the substrate loading step S100, but the order may be reversed or may be executed at the same time. (Explanation of symbols)
- Substrate processing device 200 Wafer 203
- Processing container 212 Resonant coil
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Abstract
Description
本開示の第1実施形態の一例を図1~図7に従って説明する。なお、各図に示す矢印Hは鉛直方向であって装置上下方向を示し、矢印Wは、水平方向であって装置幅方向を示し、矢印Dは、水平方向であって装置奥行向を示す。
本第1実施形態に係る基板処理装置100は、主に基板に形成された膜に対して酸化処理を行うように構成されている。
ウエハ200を載置する基板載置部としてのサセプタ217は、図1に示されるように、処理室201の底側中央に配置されている。
ガス供給部230は、図1に示されるように、処理室201の上方に設けられている。具体的には、処理室201の上方、つまり上側容器210の上部には、ガス供給ヘッド236が設けられている。ガス供給ヘッド236は、キャップ状の蓋体233と、ガス導入口234と、バッファ室237と、開口238と、遮蔽プレート240と、ガス吹出口239とを備え、反応ガスを処理室201へ供給できるように構成されている。
排気部228は、図1に示されるように、処理室201の下方で、搬入出口245に対して水平方向で対向するように設けられている。具体的には、下側容器211の側壁には、処理室201から反応ガス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、上流側から順に圧力調整器(圧力調整部)としてのAPC(Auto Pressure Controller)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。
プラズマ生成部216は、図1に示されるように、主に、上側容器210の円筒部210aの外壁の外側に設けられている。具体的には、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を囲むように、螺旋状の共振コイル212が設けられている。換言すれば、円筒部210aの径方向(以下「容器径方向」)の外側(円筒部210aの中心から離れる側)から処理容器203を囲むように、螺旋状の共振コイルが設けられている。共振コイル212は、電極の一例である。
高周波電源273は、共振コイル212に高周波電力(RF電力)を供給するものである。RFセンサ272は高周波電源273の出力側に設けられ、供給される高周波の進行波や反射波の情報をモニタするものである。RFセンサ272によってモニタされた反射波電力は整合器274に入力され、整合器274は、RFセンサ272から入力された反射波の情報に基づいて、反射波が最小となるよう、高周波電源273のインピーダンスや出力される高周波電力の周波数を制御するものである。
共振コイル212は、所定の波長の定在波を形成するため、一定の波長で共振するように巻径、巻回ピッチ、巻数が設定される。すなわち、共振コイル212の電気的長さは、高周波電源273から供給される高周波電力の所定周波数における1波長の整数倍(1倍、2倍、…)に相当する長さに設定される。換言すれば、基板処理装置100は、共振コイル212の電気的長さの整数倍の波長を有する高周波電力を電極に供給する高周波電源を273備える。
遮蔽板224は、容器径方向の外側から共振コイル212を覆い、共振コイル212によって生じる電界を遮蔽すると共に、共振回路を構成するのに必要な容量成分(C成分)を共振コイル212との間に形成するために設けられている。遮蔽板224は、遮蔽部の一例である。
移動部310は、共振コイル212を処理容器203に対して移動させるように構成されている。先ず、共振コイル212を処理容器203に対して移動させる目的について説明する。
第一移動部320は、図4に示されるように、ベースプレート248において装置奥行方向の手前側(紙面下側)で、かつ、装置幅方向の一方側(紙面左側)の部分に配置されている。この第一移動部320は、図5に示されるように、共振コイル212に間接的に取り付けられると共に共振コイル212と一体となって移動する可動部322と、作動することで可動部322を移動させて可動部322の位置を調整する機構である調整部332と、ステッピングモータである駆動部340とを備えている。ここで、「一体となって移動する」とは、相対関係を変えることなく移動すると言う意味である。
可動部322は、本体部324と、本体部324に支持されている支持部328とを備えている。
調整部332は、装置奥行方向に延びるねじ軸334と、ねじ軸334を回転可能に支持する一対の支持板336とを備えている。
第二移動部370は、図4に示されるように、ベースプレート248において装置奥行方向の奥側(紙面上側)で、かつ、装置幅方向の一方側(紙面左側)の部分に配置されている。
可動部372は、本体部374と、本体部374に支持されている支持部378とを備えている。
調整部382は、装置幅方向に延びるねじ軸384と、ねじ軸384を回転可能に支持する一対の支持板386とを備えている。
コントローラ221は、図1に示されるように、信号線Aを通じてAPC242、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~252c及びバルブ253a~253c,243aを、それぞれ制御するように構成されている。
記憶装置221cは、例えばフラッシュメモリ、HDD(Hard Disk Drive)等で構成されている。記憶装置221cには、基板処理装置の動作を制御する制御プログラムや、後述する基板処理の手順や条件などが記載されたプログラムレシピ等が読み出し可能に格納されている。記憶装置221cは、記憶部の一例である。
I/Oポート221dは、上述のMFC252a~252c、バルブ253a~253c、243a、243b、ゲートバルブ244、APCバルブ242、真空ポンプ246、RFセンサ272、高周波電源273、整合器274、サセプタ昇降機構268、ヒータ電力調整機構276、駆動部340、390等に接続されている。
CPU221aは、記憶装置221cからの制御プログラムを読み出して実行すると共に、入出力装置222からの操作コマンドの入力等に応じて記憶装置221cからプロセスレシピを読み出すように構成されている。CPU221aは、制御部の一例である。
次に、基板処理装置100を用いて半導体装置を製造する方法について、図7に示すフロー図を用いて説明する。
基板搬入工程S100では、ウエハ200を処理室201に搬入する。具体的には、図1に示すサセプタ昇降機構268がウエハ200の搬送位置までサセプタ217を下降させて、サセプタ217の貫通孔217aにウエハ突上げピン266を貫通させる。
位置調整工程S200では、作業者によって入出力装置222に入力された共振コイル212の移動情報に基づいて、第一移動部320が、共振コイル212を装置奥行方向に移動させ、第二移動部370が、共振コイル212を装置幅方向に移動させる。
昇温・真空排気工程S300では、処理室201に搬入されたウエハ200の昇温を行う。図1に示すヒータ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を保持することでウエハ200を加熱する。ここでは、ウエハ200の温度が600℃となるよう加熱する。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を真空排気し、処理室201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S700が終了するまで稼働させておく。
反応ガス供給工程S400では、反応ガスとして、酸素含有ガスであるO2ガスと水素含有ガスであるH2ガスの供給を開始する。具体的には、図1に示すバルブ253a及び253bを開け、MFC252a及び252bにて流量制御しながら、処理室201へO2ガス及びH2ガスの供給を開始する。このとき、O2ガスの流量を、例えば20~2000sccmの範囲内の所定値とする。また、H2ガスの流量を、例えば20~1000sccmの範囲内の所定値とする。
処理室201の圧力が安定した後に、プラズマ処理工程S500では、図1に示す共振コイル212に対して高周波電源273からRFセンサ272を介して、高周波電力の供給が開始される。本実施形態では、高周波電源273から共振コイル212に27.12MHzの高周波電力を供給する。共振コイル212に供給する高周波電力は、例えば100~5000Wの範囲内の所定の電力である。
O2ガス及びH2ガスの供給を停止した後に、真空排気工程S600では、図1に示すガス排気管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のO2ガスやH2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の外部へと排気する。その後、APC242の開度を調整し、処理室201の圧力を処理室201に隣接する真空搬送室(ウエハ200の搬出先。図示せず)と同じ圧力に調整する。
処理室201が所定の圧力となった後に、基板搬出工程S700では、図1に示すサセプタ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の外部へ搬出する。さらに、駆動部340、390を稼働させて、共振コイル212を基準位置に移動させる。以上により、本実施形態に係る基板処理工程を終了する。
以上説明したように、基板処理装置100では、位置調整工程S200で、駆動部340、390を稼働させて、共振コイル212を処理容器203に対して移動させる。これにより、処理室201内のプラズマ分布(プラズマ密度分布)を処理容器203の周方向に沿って一様となるようにすることができる。換言すれば、共振コイル212を処理容器203に対して相対移動させることで、処理室201内のプラズマ分布を所望の分布にすることができる。
本開示の第2実施形態の一例を図8~図10に従って説明する。なお、第2実施形態については、第1実施形態と異なる部分を主に説明する。
第一移動部420は、図9に示されるように、遮蔽板224の上側フランジ226の上面226aにおける装置奥行方向の手前側に配置された作動部430と、遮蔽板224の上側フランジ226の上面226aにおける装置奥行方向の奥側に配置された作動部440とを備えている。また、図8に示されるように、処理容器203に蓋体233の上面には、円盤状の円盤部218が設けられている。
第二移動部470は、図9に示されるように、遮蔽板224の上側フランジ226の上面226aにおける装置幅方向の一方側に配置された作動部480と、遮蔽板224の上側フランジ226の上面226aにおける装置幅方向の他方側に配置された作動部490とを備えている。
本開示の第3実施形態の一例を図11~図13に従って説明する。なお、第3実施形態については、第2実施形態と異なる部分を主に説明する。
第一移動部520は、図12に示されるように、遮蔽板224の上側フランジ226の上面226aにおける装置奥行方向の手前側に配置された作動部430と、遮蔽板224の上側フランジ226の上面226aにおける装置奥行方向の奥側に配置された作動部540とを備えている。
第二移動部570は、図12に示されるように、作動部480と、遮蔽板224の上側フランジ226の上面226aの装置幅方向の他方側に配置された作動部590とを備えている。
(符号の説明)
200 ウエハ
203 処理容器
212 共振コイル
Claims (18)
- 内部に基板が配置される処理室が形成された筒状部を有する処理容器と、
前記処理室へ処理ガスを供給するガス供給部と、
前記処理容器の前記筒状部の外側から前記処理容器を囲むように螺旋状に設けられ、高周波電力が供給されて前記処理ガスをプラズマ励起する電極と、
前記筒状部の径方向に前記電極を前記処理容器に対して相対移動させる移動部と、
を備える基板処理装置。 - 前記移動部は、前記径方向である一の方向と、前記径方向であると共に前記一の方向に対して直交する他の方向とに、前記電極を前記処理容器に対して相対移動させる請求項1に記載の基板処理装置。
- 前記移動部は、前記電極に直接又は間接的に取り付けられると共に前記電極と一体となって移動する可動部と、前記可動部を移動させて前記可動部の位置を調整する調整部とを備える請求項1に記載の基板処理装置。
- 前記移動部は、前記調整部を作動させる駆動部を備える請求項3に記載の基板処理装置。
- 前記電極を移動させるための移動情報が入力される入力部と、
前記駆動部を制御し、前記入力部に入力された移動情報に基づいて前記駆動部によって前記調整部を作動させる制御部と、
を備える請求項4に記載の基板処理装置。 - 前記移動情報としての処理条件と、前記処理条件に対応する前記電極の前記処理容器に対する相対位置と、を記憶した記憶部を備え、
前記制御部は、前記入力部に入力される前記処理条件と、前記記憶部に記憶された前記処理条件に対応する前記電極の前記処理容器に対する相対位置と、に基づいて前記駆動部を制御する請求項5に記載の基板処理装置。 - 前記処理条件は、処理される基板の温度、前記処理室の圧力、基板を処理する前記処理ガスの種類、前記処理ガスの流量、及び前記電極へ供給される高周波電力のうち、少なくとも一個を含む請求項6に記載の基板処理装置。
- 前記処理条件は、前記処理容器の前記筒状部の軸方向における、前記電極と処理される基板との相対位置を少なくとも含む請求項6に記載の基板処理装置。
- 前記処理条件は、処理される基板の種類を少なくとも含む請求項6に記載の基板処理装置。
- 前記処理条件は、処理される基板の処理時間を少なくとも含む請求項6に記載の基板処理装置。
- 前記処理室で基板を処理している間は、前記制御部は、前記駆動部を非稼働状態とする請求項5~10の何れか1項に記載の基板処理装置。
- 前記処理室で基板を処理している間の所定のタイミングにおいて、前記制御部は、前記駆動部を稼働させて予め決められた位置に前記電極を移動させる請求項5~10の何れか1項に記載の基板処理装置。
- 前記電極の電気的長さの整数倍の波長を有する高周波電力を前記電極に供給する高周波電源を備える請求項1~12の何れか1項に記載の基板処理装置。
- 前記径方向の外側から前記電極を覆い、前記電極によって生じる電界を遮蔽する遮蔽部を備え、
前記遮蔽部は、前記電極と一体となって移動する請求項1~13の何れか1項に記載の基板処理装置。 - 前記遮蔽部及び前記電極を下方から支持する支持部を備え、
前記移動部は、前記支持部を移動させることで、前記遮蔽部及び前記電極を移動させる請求項14に記載の基板処理装置。 - 前記電極の予め決められた基準位置に対する移動量を表示する表示部を備える請求項1~15の何れか1項に記載の基板処理装置。
- 筒状部を有する処理容器に形成された処理室に基板を搬入する工程と、
前記処理容器の前記筒状部の外側から前記処理容器を囲むように螺旋状に設けられる電極を、前記処理容器に対して相対移動させる工程と、
前記処理室に処理ガスを供給する工程と、
前記電極に高周波電力を供給することで、前記処理室に供給された前記処理ガスをプラズマ励起する工程と、
を備える半導体装置の製造方法。 - 筒状部を有する処理容器に形成された処理室に基板を搬入する手順と、
前記処理容器の前記筒状部の外側から前記処理容器を囲むように螺旋状に設けられる電極を、前記処理容器に対して相対移動させる手順と、
前記処理室に処理ガスを供給する手順と、
前記電極に高周波電力を供給することで、前記処理室に供給された前記処理ガスをプラズマ励起する手順と、
をコンピュータにより基板処理装置に実行させるプログラム。
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US8652297B2 (en) * | 2010-08-03 | 2014-02-18 | Applied Materials, Inc. | Symmetric VHF plasma power coupler with active uniformity steering |
US20140175055A1 (en) * | 2012-12-21 | 2014-06-26 | Qualcomm Mems Technologies, Inc. | Adjustable coil for inductively coupled plasma |
KR102454251B1 (ko) * | 2016-04-20 | 2022-10-14 | 가부시키가이샤 코쿠사이 엘렉트릭 | 기판 처리 장치, 반도체 장치의 제조 방법 및 프로그램 |
TWI713414B (zh) * | 2017-10-23 | 2020-12-11 | 日商國際電氣股份有限公司 | 基板處理裝置、半導體裝置之製造方法及記錄媒體 |
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2020
- 2020-03-11 CN CN202080083477.4A patent/CN114788419A/zh active Pending
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Also Published As
Publication number | Publication date |
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TWI792163B (zh) | 2023-02-11 |
TW202135602A (zh) | 2021-09-16 |
EP4120804A1 (en) | 2023-01-18 |
JP7241961B2 (ja) | 2023-03-17 |
JPWO2021181565A1 (ja) | 2021-09-16 |
CN114788419A (zh) | 2022-07-22 |
KR20220106181A (ko) | 2022-07-28 |
US20220328289A1 (en) | 2022-10-13 |
EP4120804A4 (en) | 2023-11-22 |
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