WO2021187425A1 - 基板処理装置、排気装置、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、排気装置、半導体装置の製造方法及びプログラム Download PDFInfo
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- WO2021187425A1 WO2021187425A1 PCT/JP2021/010402 JP2021010402W WO2021187425A1 WO 2021187425 A1 WO2021187425 A1 WO 2021187425A1 JP 2021010402 W JP2021010402 W JP 2021010402W WO 2021187425 A1 WO2021187425 A1 WO 2021187425A1
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- gas
- containing gas
- metal
- processing chamber
- oxygen
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- DWCMDRNGBIZOQL-UHFFFAOYSA-N dimethylazanide;zirconium(4+) Chemical compound [Zr+4].C[N-]C.C[N-]C.C[N-]C.C[N-]C DWCMDRNGBIZOQL-UHFFFAOYSA-N 0.000 description 1
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- 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
- H01J2237/332—Coating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
- H01L21/02189—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal the material containing zirconium, e.g. ZrO2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
Definitions
- This disclosure relates to a manufacturing method and a program of a substrate processing device, an exhaust device, and a semiconductor device.
- the film forming raw material vaporized by a method such as CVD or ALD is supplied to the reaction chamber and exhausted to the abatement device by a vacuum pump through an exhaust pipe.
- various obstacles such as liquefaction of the film-forming raw material, thermal decomposition, and generation of by-products due to the film-forming reaction may occur depending on the material properties of the film-forming raw material.
- the internal rotor mechanism may stop due to the accumulation of by-products, so a trap mechanism for capturing the film-forming raw material may be provided between the reaction chamber and the vacuum pump.
- the trap mechanism has a complicated structure in order to easily capture the film-forming raw material, and the exhaust conductance tends to be small.
- the purpose of the present disclosure is to provide a technique for suppressing a decrease in collection efficiency and a decrease in pump exhaust performance.
- the exhaust unit is provided between a gas exhaust pipe, a pump that exhausts the processing chamber, an auxiliary pump that assists the pump, and the pump and the auxiliary pump, and captures the metal-containing gas component by plasma.
- a trap part for collecting and Technology is provided.
- FIG. 5 is a vertical cross-sectional view taken along the line AA of FIG. It is a schematic vertical sectional view for demonstrating the trap preferably used for the embodiment of this disclosure. It is a figure which shows the controller configuration which is preferably used for the embodiment of this disclosure. It is a flowchart for demonstrating the process of manufacturing a metal oxide film using the substrate processing apparatus of a preferable embodiment of this disclosure. It is a timing chart for demonstrating the process of manufacturing a metal oxide film using the substrate processing apparatus of the preferred embodiment of this disclosure.
- this substrate processing apparatus is configured as a semiconductor manufacturing apparatus that carries out a film forming process as a substrate processing step in a method for manufacturing an IC (Integrated Circuit) as a semiconductor device (semiconductor device).
- the processing furnace 202 included in the substrate processing apparatus has a heater 207 as a heating means (heating mechanism).
- the heater 207 has a cylindrical shape and is vertically installed by being supported by a heater base (not shown) as a holding plate.
- a reaction tube 203 that constitutes a reaction vessel (processing vessel) concentrically with the heater 207 is provided.
- the rotation shaft 255 of the rotation mechanism 267 penetrates the seal cap and is connected to the boat 217, and is configured to rotate the wafer 200 as a substrate by rotating the boat 217.
- the seal cap 219 is configured to be vertically lifted and lowered by a boat elevator 115 as a lifting mechanism provided outside the reaction tube 203, whereby the boat 217 can be carried in and out of the processing chamber 201. It is possible.
- a boat 217 is erected on the seal cap 219 via a quartz cap 218 as a heat insulating member.
- the quartz cap 218 is made of a heat-resistant material such as quartz or silicon carbide, functions as a heat insulating portion, and is a holder for holding the boat.
- the boat 217 is made of a heat-resistant material such as quartz or silicon carbide, and a plurality of wafers 200 are aligned in a horizontal position and centered on each other so as to be supported in multiple stages in the tube axis direction. There is.
- a nozzle 249a and a nozzle 249b are provided in the processing chamber 201 below the reaction tube 203 so as to penetrate the reaction tube 203.
- a gas supply pipe 232a and a gas supply pipe 232b are connected to the nozzle 249a and the nozzle 249b, respectively.
- the reaction tube 203 is provided with two nozzles 249a and 249b and two gas supply tubes 232a and 232b so that a plurality of types of gas can be supplied into the processing chamber 201. It is configured in.
- the gas supply pipe 232a and the gas supply pipe 232b are connected to the inert gas supply pipes 232c, 232e and the like, respectively.
- the gas supply pipe 232a is a vaporizer (vaporizing means) in order from the upstream direction, and is a vaporizer 271a, a mist filter 300, a gas filter 272a, and a flow rate controller that vaporize a liquid raw material to generate a vaporized gas as a raw material gas.
- a mass flow controller (MFC) 241a which is a flow rate control unit
- a valve 243a which is an on-off valve are provided. By opening the valve 243a, the vaporized gas generated in the vaporizer 271a is supplied into the processing chamber 201 via the nozzle 249a.
- a vent line 232d connected to the gas exhaust pipe 231 described later is connected to the gas supply pipe 232a between the MFC 241a and the valve 243a.
- the vent line 232d is provided with a valve 243d which is an on-off valve.
- the raw material gas described later is not supplied to the processing chamber 201, the raw material gas is supplied to the vent line 232d via the valve 243d.
- valve 243a By closing the valve 243a and opening the valve 243d, it is possible to stop the supply of the vaporized gas into the processing chamber 201 while continuing the generation of the vaporized gas in the vaporizer 271a. It takes a predetermined time to stably generate the vaporized gas, but the supply / stop of the vaporized gas into the processing chamber 201 can be switched in a very short time by the switching operation of the valve 243a and the valve 243d. It is configured in.
- the gas supply pipe 232a is connected to the inert gas supply pipe 232c on the downstream side of the valve 243a.
- the inert gas supply pipe 232c is provided with an MFC 241c which is a flow rate controller (flow control unit) and a valve 243c which is an on-off valve in order from the upstream direction.
- a heater 150 is attached to the gas supply pipe 232a, the inert gas supply pipe 232c, and the vent line 232d to prevent reliquefaction.
- the above-mentioned nozzle 249a is connected to the tip of the gas supply pipe 232a.
- the nozzle 249a is provided in an arcuate space between the inner wall of the reaction tube 203 and the wafer 200 so as to rise upward from the lower part to the upper part of the inner wall of the reaction tube 203 in the loading direction of the wafer 200. There is.
- the nozzle 249a is configured as an L-shaped long nozzle.
- a gas supply hole 250a for supplying gas is provided on the side surface of the nozzle 249a. As shown in FIG. 2, the gas supply hole 250a is opened so as to face the center of the reaction tube 203. A plurality of the gas supply holes 250a are provided from the lower part to the upper part of the reaction tube 203, each having the same opening area, and further provided with the same opening pitch.
- the first processing gas supply system is mainly composed of a gas supply pipe 232a, a vent line 232d, a valve 243a, 243d, an MFC241a, a vaporizer 271a, a mist filter 300, a gas filter 272a, and a nozzle 249a. At least, the nozzle 249a constitutes the first gas supply unit. Further, the first inert gas supply system is mainly composed of the inert gas supply pipe 232c, the MFC 241c, and the valve 243c.
- the gas supply pipe 232b sequentially from the upstream direction, ozone (O 3) ozonizer 500 is a device for generating a gas, the valve 243b is provided a MFC241b and closing valve is valve 243 f, a flow rate controller (flow rate control unit) Has been done.
- the upstream side of the gas supply pipe 232b is connected to, for example, an oxygen gas supply source (not shown) that supplies oxygen (O 2) gas.
- the O 2 gas supplied to the ozonizer 500 becomes O 3 gas as an oxygen-containing gas in the ozonizer 500, and is configured to be supplied into the processing chamber 201.
- a vent line 232g connected to the gas exhaust pipe 231 described later is connected to the gas supply pipe 232b between the ozonizer 500 and the valve 243f.
- This is the vent line 232g valve 243g is provided a closing valve, when not supplying the O 3 gas will be described later in the process chamber 201, supplies via the valve 243g raw material gas to the vent line 232g.
- the valve 243 f by the switching operation of the valve 243 g, the supply and stop of the O 3 gas into the processing chamber 201 very short time It is configured so that it can be switched.
- the gas supply pipe 232b is connected to the inert gas supply pipe 232e on the downstream side of the valve 243b.
- the inert gas supply pipe 232e is provided with an MFC 241e which is a flow rate controller (flow control unit) and a valve 243e which is an on-off valve in order from the upstream direction.
- the above-mentioned nozzle 249b is connected to the tip of the gas supply pipe 232b.
- the nozzle 249b is provided in an arcuate space between the inner wall of the reaction tube 203 and the wafer 200 so as to rise upward from the lower part to the upper part of the inner wall of the reaction tube 203 in the loading direction of the wafer 200. There is.
- the nozzle 249b is configured as an L-shaped long nozzle.
- a gas supply hole 250b for supplying gas is provided on the side surface of the nozzle 249b. As shown in FIG. 2, the gas supply hole 250b is opened so as to face the center of the reaction tube 203. A plurality of the gas supply holes 250b are provided from the lower part to the upper part of the reaction tube 203, each having the same opening area, and further provided with the same opening pitch.
- the gas supply pipe 232b, the vent line 232g, the ozonizer 500, the valve 243f, 243g, 243b, the MFC241b, and the nozzle 249b constitute a second processing gas supply system.
- the nozzle 249b constitutes the second gas supply unit.
- the second inert gas supply system is mainly composed of the inert gas supply pipe 232e, MFC241e, and valve 243e.
- the raw material gas as a metal-containing gas is used as the first raw material gas through the vaporizer 271a, the mist filter 300, the gas filter 272a, the MFC 241a, the valve 243a, and the nozzle 249a. Supplied in.
- oxygen (O) gas containing atoms oxygen-containing gas
- oxygen-containing gas oxygen-containing gas
- the oxidizing gas oxidizing agent
- the gas is supplied into the processing chamber 201 via the valve 243f, the MFC 241b, and the valve 243b. It is also possible to supply the O 2 gas as an oxidation gas (first oxygen-containing gas) into the processing chamber 201 without generating the O 3 gas by the ozonizer 500.
- the inert gas is supplied to the processing chamber 201 via the MFC 241c, 241e, the valve 243c, 243e, the gas supply pipe 232a, 232b, the nozzle 249a, 249b, respectively.
- the reaction pipe 203 is provided with an exhaust pipe 231 that exhausts the atmosphere of the processing chamber 201. Vacuum exhaust to the exhaust pipe 231 via a pressure sensor 245 as a pressure detector (pressure detection unit) for detecting the pressure in the processing chamber 201 and an APC (Auto Pressure Controller) valve 244 as a pressure regulator (pressure adjustment unit).
- the device 246 is connected to the processing chamber 201 so that the pressure in the processing chamber 201 can be evacuated to a predetermined pressure (degree of vacuum).
- the APC valve 244 is an on-off valve that can open and close the valve to stop the vacuum exhaust and vacuum exhaust of the processing chamber 201, and further adjust the valve opening degree to adjust the pressure.
- the exhaust system is mainly composed of a gas exhaust pipe 231, an APC valve 244, a vacuum exhaust device 246, and a pressure sensor 245.
- the vacuum exhaust device 246 is connected from the processing chamber 201 side in the order of a mechanical booster pump (MBP) 9 as an auxiliary pump, a trap mechanism 10 for collecting film forming raw materials and by-products, and a dry pump (DP) 11 as a pump. It is composed of.
- An exclusion device 12 is connected to the dry pump 11. Since the dry pump 11 compresses the atmosphere, heat of compression is generated. Therefore, there is a possibility that the organometallic raw material reacts and the product adheres.
- the mechanical booster pump 9 operates closer to the processing chamber 201 and closer to the vacuum than the dry pump 11, so that heat of compression is less likely to be generated, so that the organometallic raw material passes through without reacting.
- a mechanical booster pump 9 may be provided between the trap mechanism 10 and the dry pump 11.
- an exhaust unit exhaust device is composed of a gas exhaust pipe 231, a mechanical booster pump 9, a trap unit 100, and a dry pump 11.
- the trap unit 100 supplies an oxygen-containing gas to the trap mechanism 10 that collects the metal-containing gas contained in the exhaust gas, the plasma generation unit 16 that generates plasma, and the plasma generation unit 16.
- a gas supply pipe (gas supply unit) 17 a high frequency power supply 18 that supplies high frequency power to the plasma generation unit 16, and a gas supply pipe (gas) that supplies active species activated by the plasma generation unit 16 to the trap mechanism 10.
- Supply unit 21 The trap mechanism 10 uses an oxygen plasma method to attach the film-forming raw material and by-products to the trap fin 14 and collect them by radical oxidation while the film-forming raw material is flowing.
- the material of the trap fin 14 is preferably stainless steel, for example, SUS316.
- oxygen (O 2 ) gas (may be H 2 O or O 3 ) is supplied to the plasma generation unit 16 as the oxygen-containing gas (second oxygen-containing gas).
- high-frequency power for example, 27.12 MHz high-frequency power within the range of 0.5 kW or more and 3.5 kW or less
- plasma is generated between the electrode 19 connected to the high frequency power supply 18 and the electrode 20 connected to the ground which is the reference potential and grounded, and the oxygen gas excited (activated) into the plasma state (plasmaized and activated). (Activated species) is produced.
- the means for generating this plasma is capacitively coupled plasma (abbreviation: CCP).
- the active species activated by the plasma generation unit 16 is supplied into the trap mechanism 10 via the gas supply pipe 21, the active species reacts with the metal-containing gas component, and the product adheres to the trap fin 14.
- the metal-containing gas component that has not reacted or has contributed to the formation of the metal-containing layer is removed from the exhaust gas.
- the exhaust gas from which the metal-containing gas component has been removed after contributing to the formation of the unreacted or metal-containing layer is discharged from the Out of the trap mechanism 10 to the dry pump 11. This makes it possible to prevent the accumulation of products in the dry pump 11.
- IPC Inductively Coupled Plasma
- ECR plasma Electron Cyclotron Resonance Plasma
- HWP Helicon wave excited plasma
- SWP Surface Wave Plasma
- the first oxygen-containing gas used in the film forming step and the second oxygen-containing gas used in the trap unit 100 may be the same gas or different gases.
- For the same gas requires a large amount of O 3 in the film formation step, it is difficult to ensure the amount used in the trap portion 100. Therefore, by using O 2 for plasma as a different gas, it is possible to reduce the consumption of O 3. If secure the amount to be used in an amount and traps used in the film formation step, the case of using O 3 as the same gas, it is possible to use in common the ozonizer, it is possible to simplify the device configuration.
- the temperature of the exhaust gas does not need to be controlled in particular, but the exhaust pipe may be heated to heat the exhaust gas. By doing so, the organometallic raw material and the oxygen plasma become more easily reacted.
- a temperature sensor 263 as a temperature detector is installed in the reaction tube 203, and the temperature in the processing chamber 201 can be adjusted by adjusting the energization condition to the heater 207 based on the temperature information detected by the temperature sensor 263. It is configured to have a desired temperature distribution.
- the temperature sensor 263 is L-shaped like the nozzles 249a and 249b, and is provided along the inner wall of the reaction tube 203.
- the controller 121 which is a control unit (control means), is configured as a computer including a CPU (Central Processing Unit) 121a, a RAM (Random Access Memory) 121b, a storage device 121c, and an I / O port 121d. ing.
- the RAM 121b, the storage device 121c, and the I / O port 121d are configured so that data can be exchanged with the CPU 121a via the internal bus.
- An input / output device 122 configured as, for example, a touch panel is connected to the controller 121.
- an external storage device (storage medium) 123 that stores a program described later can be connected to the controller 121.
- the storage device 121c 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 device, a process recipe in which the procedures and conditions for substrate processing described later are described, and the like are readablely stored. Further, by storing the control program, the process recipe, etc. in the external storage device 123 and connecting the external storage device 123 to the controller 121, the control program, the process recipe, etc. can be stored in the storage device 121c.
- the process recipe is a combination of the process recipes so that the controller 121 can execute each procedure in the substrate processing process described later and obtain a predetermined result, and functions as a program.
- this process recipe, control program, etc. are collectively referred to as a program.
- the term program may include only the process recipe alone, the control program alone, or both.
- the RAM 121b is configured as a memory area (work area) in which programs, data, and the like read by the CPU 121a are temporarily held.
- the I / O port 121d includes MFC 241a, 241b, 241c, 241e, valve 243a, 243b, 243c, 243d, 243e, 243f, 243g, vaporizer 271a, mist filter 300, ozonizer 500, pressure sensor 245, APC valve 244, and mechanical. It is connected to a booster pump 9, a dry pump 11, a high frequency power supply 18, heaters 150 and 207, a temperature sensor 263, a boat rotation mechanism 267, a boat elevator 115 and the like.
- the CPU 121a is configured to read and execute a control program from the storage device 121c and read a process recipe from the storage device 121c in response to an input of an operation command from the input / output device 122 or the like.
- the CPU 121a adjusts the flow rate of various gases by the MFC 241a, 241b, 241c, 241e, opens and closes the valves 243a, 243b, 243c, 243d, 243e, 243f, 243g, opens and closes the APC valve 244, and pressure sensor.
- a film forming method for example, a method of simultaneously supplying a plurality of types of gases containing a plurality of elements constituting the film to be formed, and a method of alternately supplying a plurality of types of gases containing a plurality of elements constituting the film to be formed. There is a way.
- step S101 when a plurality of wafers 200 are loaded (wafer charged) into the boat 217 (see FIG. 5, step S101), the boat 217 supporting the plurality of wafers 200 is lifted by the boat elevator 115 and processed in the processing chamber 201. (Boat load) (see FIG. 5, step S102). In this state, the seal cap 219 is in a state of sealing the lower end of the reaction tube 203 via the O-ring 220.
- the processing chamber 201 is evacuated by the vacuum exhaust device 246 so as to have a desired pressure (vacuum degree). At this time, the pressure in the processing chamber 201 is measured by the pressure sensor 245, and the APC valve 244 is feedback-controlled (pressure adjustment) based on the measured pressure (see FIG. 5, step S103).
- the processing chamber 201 is heated by the heater 207 so as to reach a desired temperature.
- the state of energization of the heater 207 is feedback-controlled based on the temperature information detected by the temperature sensor 263 so that the processing chamber 201 has a desired temperature distribution (temperature adjustment) (see FIG. 5, step S103).
- the rotation mechanism 267 rotates the boat 217 to rotate the wafer 200.
- an insulating film forming step (see FIG. 5, step S104) of forming a metal oxide film as an insulating film by supplying the metal-containing gas and the oxygen-containing gas to the processing chamber 201 is performed.
- the following four steps are sequentially executed.
- step S105 the metal-containing gas is first flowed.
- the metal-containing gas flows into the gas supply pipe 232a via the vaporizer 271a, the mist filter 300 and the gas filter 272a.
- the flow rate of the metal-containing gas flowing in the gas supply pipe 232a is adjusted by the MFC 241a.
- the flow-adjusted metal-containing gas is exhausted from the gas exhaust pipe 231 while being supplied to the processing chamber 201 from the gas supply hole 250a of the nozzle 249a.
- the valve 243c is opened at the same time to allow the inert gas to flow into the gas supply pipe 232c.
- the flow rate of the inert gas flowing in the gas supply pipe 232c is adjusted by the MFC 241c.
- the flow-adjusted inert gas is exhausted from the gas exhaust pipe 231 while being supplied to the processing chamber 201 together with the metal-containing gas. By supplying the metal-containing gas to the processing chamber 201, it reacts with the wafer 200, and a metal-containing layer is formed on the wafer 200.
- the APC valve 244 is appropriately adjusted so that the pressure in the processing chamber 201 is set to, for example, a pressure in the range of 50 to 400 Pa.
- the supply flow rate of the metal-containing gas controlled by the MFC 241a is, for example, a flow rate within the range of 0.1 to 0.5 g / min.
- the time for exposing the metal-containing gas to the wafer 200 that is, the gas supply time (irradiation time) is, for example, a time within the range of 30 to 240 seconds.
- the temperature of the heater 207 is set so that the temperature of the wafer 200 is in the range of, for example, 150 to 250 ° C.
- step S106 In step S106 (see FIGS. 5 and 6), after the metal-containing layer is formed, the valve 243a is closed, the valve 243d is opened, the supply of the metal-containing gas to the processing chamber 201 is stopped, and the metal-containing gas is vented. Flow to line 232d. At this time, the APC valve 244 of the gas exhaust pipe 231 is left open, the processing chamber 201 is evacuated by the vacuum exhaust device 246, and the metal content after contributing to the formation of the unreacted or metal-containing layer remaining in the processing chamber 201. Exhaust the gas from the processing chamber 201. At this time, the valve 243c is left open to maintain the supply of the inert gas to the processing chamber 201.
- the exhaust gas containing the metal-containing gas (metal-containing gas component) exhausted from the processing chamber 201 is supplied to the trap mechanism 10.
- the metal-containing gas component supplied into the trap mechanism 10 reacts with the active species, and the product adheres to the trap fin 14, so that the exhaust gas is unreacted or contains metal after contributing to the formation of the metal-containing layer. The gas component is removed.
- step S107 after removing the residual gas in the processing chamber 201, the oxygen-containing gas is flowed into the gas supply pipe 232b.
- the O 2 gas flowing through the gas supply pipe 232b becomes O 3 gas by the ozonizer 500.
- the flow rate of the oxygen-containing gas (second oxygen-containing gas) flowing in the gas supply pipe 232b is adjusted by the MFC241b.
- the gas is supplied from the gas exhaust pipe 231 while being supplied to the processing chamber 201 through the gas supply hole 250b of the nozzle 249b.
- valve 243e is opened to allow the inert gas to flow into the inert gas supply pipe 232e.
- the inert gas gas is exhausted from the gas exhaust pipe 231 while being supplied to the processing chamber 201 together with the oxygen-containing gas.
- the metal-containing layer formed on the wafer 200 reacts with the oxygen-containing gas to form a metal oxide layer.
- the APC valve 244 is appropriately adjusted so that the pressure in the processing chamber 201 is set to, for example, a pressure in the range of 50 to 400 Pa.
- Supply flow rate of O 3 gas controlled by MFC241b is, for example, the flow rate in the range of 10 ⁇ 20 slm.
- the time for exposing the wafer 200 to the oxygen-containing gas, that is, the gas supply time (irradiation time) is, for example, in the range of 60 to 300 seconds.
- the temperature of the heater 207 is set to a temperature within the range of 150 to 250 ° C., as in step 105.
- a metal oxide film having a predetermined film thickness can be formed on the wafer 200.
- the above cycle is preferably repeated a plurality of times. As a result, a desired metal oxide film is formed on the wafer 200.
- the valve 243a of the gas supply pipe 232a is closed, the valve 243b of the gas supply pipe 232b is closed, the 243c of the inert gas supply pipe 232c is opened, and the 243e of the inert gas supply pipe 232e is opened.
- An inert gas is flowed through the treatment chamber 201.
- the inert gas acts as a purge gas, whereby the treatment chamber 201 is purged with the inert gas, and the gas remaining in the treatment chamber 201 is removed from the treatment chamber 201 (purge, step S110). After that, the atmosphere of the treatment chamber 201 is replaced with the inert gas, and the pressure in the treatment chamber 201 is restored to the normal pressure (return to atmospheric pressure, step S111).
- step S112 the seal cap 219 is lowered by the boat elevator 115 to open the lower end of the manifold 209, and the processed wafer 200 is carried out from the lower end of the manifold 209 to the outside of the reaction tube 203 while being held by the boat 217. (Boat unload, step S112). After that, the processed wafer 200 is taken out from the boat 217 (wafer discharge, step S112).
- the present disclosure can also be realized by, for example, changing the process recipe of the existing substrate processing apparatus.
- the process recipe according to the present disclosure may be installed on an existing board processing device via a telecommunications line or a recording medium on which the process recipe is recorded, or input / output of the existing board processing device. It is also possible to operate the device and change the process recipe itself to the process recipe according to the present disclosure.
- the metal-containing gas includes, for example, Zr (O-tBu) 4 gas, TDMAZ (tetrakisdimethylaminozirconium: Zr (NMe 2 ) 4 ) gas, and TEMAZ (tetraxethylmethylaminozirconium (((). Zr [N (CH 3 ) C 2 H 5 ] 4 ), TDEAZ (tetrakisdiethylaminozirconium: Zr (NETt 2 ) 4 ) gas, Zr (MMP) 4 gas and the like can be used.
- Zr (O-tBu) 4 gas TDMAZ (tetrakisdimethylaminozirconium: Zr (NMe 2 ) 4 ) gas
- TEMAZ tetraxethylmethylaminozirconium (((). Zr [N (CH 3 ) C 2 H 5 ] 4 )
- TDEAZ tetrakisdiethylaminozirconium
- Trimethylaluminum (Al (CH 3 ) 3 , abbreviation: TMA) gas and other metal elements and organic metal raw material gas containing carbon can also be used.
- the reaction gas the same gas as in the above-described embodiment is used. Can be done.
- the oxygen-containing gas (first oxygen-containing gas) used in the film forming step O 2 gas, H 2 O gas, O 3 gas and the like can be used.
- the oxygen-containing gas (second oxygen-containing gas) used in the trap unit 100 O 2 gas, H 2 O gas, O 3 gas and the like can be used.
- the inert gas a rare gas such as N 2 gas, Ar gas, He gas, Ne gas, and Xe gas can be used.
- a film or the like formed on the wafer 200 is subjected to a treatment such as an oxidation treatment, a diffusion treatment, an annealing treatment, or an etching treatment.
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Abstract
Description
基板を処理する処理室と、
前記処理室内に金属含有ガスを供給する第1ガス供給部と、
前記処理室内に酸素含有ガスを供給する第2ガス供給部と、
前記処理室内から金属含有ガス成分を含む排気ガスを排気する排気部と、を有し、
前記排気部は、ガス排気管と、前記処理室内を排気するポンプと、該ポンプを補助する補助ポンプと、前記ポンプと前記補助ポンプとの間に設けられ、プラズマにより前記金属含有ガス成分を捕集するためのトラップ部と、
を備える技術が提供される。
以下、実施形態について、図面を用いて説明する。ただし、以下の説明において、同一構成要素には同一符号を付し繰り返しの説明を省略することがある。なお、図面は説明をより明確にするため、実際の態様に比べ、各部の幅、厚さ、形状等について模式的に表される場合があるが、あくまで一例であって、本開示の解釈を限定するものではない。
次に、上述の基板処理装置の処理炉を用いて半導体装置(半導体デバイス)の製造工程の一工程として、基板上に絶縁膜を成膜するシーケンス例について、図5、図6を参照して説明する。なお、以下の説明において、基板処理装置を構成する各部の動作はコントローラ121により制御される。
<ステップS105>
ステップS105(図5、図6参照)では、まず金属含有ガスを流す。ガス供給管232aのバルブ243aを開き、ベントライン232dのバルブ243dを閉じることで、気化器271a、ミストフィルタ300およびガスフィルタ272aを介してガス供給管232a内に金属含有ガスを流す。ガス供給管232a内を流れた金属含有ガスは、MFC241aにより流量調整される。流量調整された金属含有ガスはノズル249aのガス供給孔250aから処理室201に供給されつつガス排気管231から排気される。このとき、同時にバルブ243cを開き、ガス供給管232c内に不活性ガスを流す。ガス供給管232c内を流れた不活性ガスは、MFC241cにより流量調整される。流量調整された不活性ガスは金属含有ガスと一緒に処理室201に供給されつつガス排気管231から排気される。金属含有ガスを処理室201に供給することでウエハ200と反応し、ウエハ200上に金属含有含有層が形成される。
ステップS106(図5、図6参照)では、金属含有層が形成された後、バルブ243aを閉じ、バルブ243dを開けて処理室201への金属含有ガスの供給を停止し、金属含有ガスをベントライン232dへ流す。このとき、ガス排気管231のAPCバルブ244は開いたままとして、真空排気装置246により処理室201を真空排気し、処理室201に残留する未反応もしくは金属含有層形成に寄与した後の金属含有ガスを処理室201から排除する。尚、この時バルブ243cは開いたままとして、不活性ガスの処理室201への供給を維持する。これにより、処理室201に残留する未反応もしくは金属含有層形成に寄与した後の金属含有ガスを処理室201から排除する効果を高める。また、処理室201内から排気された金属含有ガス(金属含有ガス成分)を含む排気ガスは、トラップ機構内10に供給される。トラップ機構10内に供給された金属含有ガス成分と活性種が反応し、トラップフィン14に生成物が付着されることで、排気ガスから未反応もしくは金属含有含有層形成に寄与した後の金属含有ガス成分が除去される。
ステップS107(図5、図6参照)では、処理室201の残留ガスを除去した後、ガス供給管232b内に酸素含有ガスを流す。ガス供給管232b内を流れた、例えば、O2ガスは、オゾナイザ500によりO3ガスとなる。ガス供給管232bのバルブ243f及びバルブ243bを開き、ベントライン232gのバルブ243gを閉めることで、ガス供給管232b内を流れた酸素含有ガス(第2の酸素含有ガス)は、MFC241bにより流量調整され、ノズル249bのガス供給孔250bから処理室201に供給されつつガス排気管231から排気される。この時同時にバルブ243eを開き、不活性ガス供給管232e内に不活性ガスを流す。不活性ガスガスは酸素含有ガスと一緒に処理室201に供給されつつガス排気管231から排気される。酸素含有ガスを処理室201に供給することにより、ウエハ200上に形成された金属含有層と酸素含有ガスが反応して金属酸化層が形成される。
ステップS108(図5、図6参照)では、ガス供給管232bのバルブ243bを閉じ、バルブ243gを開けて処理室201への酸素ガス(第2の酸素含有ガス)の供給を停止し、酸素含有ガスをベントライン232gへ流す。このとき、ガス排気管231のAPCバルブ244は開いたままとして、真空排気装置246により処理室201を真空排気し、処理室201に残留する未反応もしくは酸化に寄与した後の酸素含有ガスを処理室201から排除する。尚、この時バルブ243eは開いたままとして、不活性ガスの処理室201への供給を維持する。これにより、処理室201に残留する未反応もしくは酸化に寄与した後の酸素ガスを処理室201から排除する効果を高める。
また、成膜工程で使用される酸素含有ガス(第1の酸素含有ガス)としては、O2ガス、H2Oガス、O3ガス等を用いることができる。
また、トラップ部100で使用される酸素含有ガス(第2の酸素含有ガス)としては、O2ガス、H2Oガス、O3ガス等を用いることができる。
また、不活性ガスとしては、N2ガスや、Arガス、Heガス、Neガス、Xeガス等の希ガスを用いることができる。
10…トラップ機構
11…ドライポンプ(ポンプ)
100…トラップ部
200…ウエハ(基板)
201…処理室
231…ガス排気管
Claims (18)
- 基板を処理する処理室と、
前記処理室内に金属含有ガスを供給する第1ガス供給部と、
前記処理室内に第1の酸素含有ガスを供給する第2ガス供給部と、
前記処理室内から金属含有ガス成分を含む排気ガスを排気する排気部と、を有し、
前記排気部は、ガス排気管と、前記処理室内を排気するポンプと、該ポンプを補助する補助ポンプと、前記ポンプと前記補助ポンプとの間に設けられ、プラズマにより排気ガスに含まれる前記金属含有ガス成分を捕集するためのトラップ部と、を備える基板処理装置。 - 前記トラップ部は、前記排気ガスに含まれる前記金属含有ガス成分を捕集するトラップ機構と、前記プラズマを生成するプラズマ生成部と、前記プラズマ生成部に第2の酸素含有ガスを供給する第2ガス供給部と、前記プラズマ生成部に高周波電力を供給する高周波電源と、前記プラズマ生成部からのガスを前記トラップ機構に供給する第3ガス供給部と、を備える請求項1に記載の基板処理装置。
- 前記プラズマ生成部は、前記第2の酸素含有ガスをプラズマ化して活性化し前記第3ガス供給部を介して前記トラップ機構に供給する請求項2に記載の基板処理装置。
- 前記プラズマ生成部は、高周波電源に接続される電極と基準電位であるアースに接続され、接地される電極を備える請求項2又は請求項3に記載の基板処理装置。
- 前記トラップ機構内で、前記金属含有ガス成分と前記プラズマ生成部で活性化された前記第2の酸素含有ガスとを反応させる請求項3又は請求項4に記載の基板処理装置。
- 前記トラップ機構は、前記金属含有ガス成分を付着させるトラップフィンを有する請求項5に記載の基板処理装置。
- 前記金属含有ガス成分と前記プラズマ生成部で活性化された第2の酸素含有ガスとを反応させて生成された生成物を前記トラップフィンに付着させる請求項6に記載の基板処理装置。
- 前記トラップフィンは、ステンレスである請求項6又は請求項7に記載の基板処理装置。
- 前記ポンプはドライポンプであり、前記補助ポンプはメカニカルブースターポンプである請求項1に記載の基板処理装置。
- 前記第1の酸素含有ガスと前記第2の酸素含有ガスが同一のガスである請求項2に記載の基板処理装置。
- 前記第1の酸素含有ガス及び前記第2の酸素含有ガスがともにオゾンである請求項10に記載の基板処理装置。
- 前記第1の酸素含有ガスと前記第2の酸素含有ガスとが異なるガスである請求項2に記載の基板処理装置。
- 前記第1の酸素含有ガスが酸素であり、前記第2の酸素含有ガスがオゾンである請求項12に記載の基板処理装置。
- 前記オゾンを発生させるオゾナイザを備える請求項11又は請求項13に記載の基板処理装置。
- (a)前記第1ガス供給部から前記処理室内に金属含有ガスを供給する処理と、(b)前記第2ガス供給部から前記処理室内に前記第1の酸素含有ガスを供給する処理と、を交互に行い、(c)(a)の後に、前記金属含有ガス成分を含む排気ガスを排気する処理と、(d)前記排気ガスに含まれる前記金属含有ガス成分を捕集する処理と、を行う請求項2に記載の基板処理装置。
- ガス排気管と、
処理室内を排気するポンプと、
該ポンプを補助する補助ポンプと、
前記ポンプと前記補助ポンプとの間に、プラズマを用いて活性化された酸素含有ガスにより排気ガスに含まれる金属含有ガス成分を捕集するためのトラップ部と、を備える排気装置。 - 基板を処理する処理室と、前記処理室内に金属含有ガスを供給する第1ガス供給部と、前記処理室内に第1の酸素含有ガスを供給する第2ガス供給部と、前記処理室内から金属含有ガス成分を含む排気ガスを排気する排気部と、を有し、前記排気部は、ガス排気管と、前記処理室内を排気するポンプと、該ポンプを補助する補助ポンプと、前記ポンプと前記補助ポンプとの間にプラズマにより前記金属含有ガス成分を捕集するためのトラップ部と、を備える基板処理装置の前記処理室に前記基板を収容する工程と、
前記処理室内に前記金属含有ガスを供給する工程と、
前記処理室から前記金属含有ガス成分を排気する工程と、
前記トラップ部により前記金属含有ガス成分を捕集する工程と、
を有する半導体装置の製造方法。 - 基板を処理する処理室と、前記処理室内に金属含有ガスを供給する第1ガス供給部と、前記処理室内に第1の酸素含有ガスを供給する第2ガス供給部と、前記処理室内から金属含有ガス成分を含む排気ガスを排気する排気部と、を有し、前記排気部は、ガス排気管と、前記処理室内を排気するポンプと、該ポンプを補助する補助ポンプと、前記ポンプと前記補助ポンプとの間にプラズマにより前記金属含有ガス成分を捕集するためのトラップ部と、を備える基板処理装置の前記処理室に前記基板を収容する手順と、
前記処理室内に前記金属含有ガスを供給する手順と、
前記処理室から前記金属含有ガス成分を排気する手順と、
前記トラップ部により前記金属含有ガス成分を捕集する手順と、
をコンピュータにより前記基板処理装置に実行させるプログラム。
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