WO2020213503A1 - SiCエピタキシャル成長装置 - Google Patents
SiCエピタキシャル成長装置 Download PDFInfo
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- WO2020213503A1 WO2020213503A1 PCT/JP2020/015890 JP2020015890W WO2020213503A1 WO 2020213503 A1 WO2020213503 A1 WO 2020213503A1 JP 2020015890 W JP2020015890 W JP 2020015890W WO 2020213503 A1 WO2020213503 A1 WO 2020213503A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- valve
- epitaxial growth
- sic epitaxial
- growth apparatus
- Prior art date
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- 239000006227 byproduct Substances 0.000 claims abstract description 48
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000000460 chlorine Substances 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 35
- 239000010408 film Substances 0.000 description 9
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 235000012431 wafers Nutrition 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- -1 for example Chemical compound 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- BUMGIEFFCMBQDG-UHFFFAOYSA-N dichlorosilicon Chemical compound Cl[Si]Cl BUMGIEFFCMBQDG-UHFFFAOYSA-N 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/36—Carbides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/42—Silicides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/02—Epitaxial-layer growth
- C30B25/14—Feed and outlet means for the gases; Modifying the flow of the reactive gases
-
- 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
- H01L21/20—Deposition of semiconductor materials on a substrate, e.g. epitaxial growth solid phase epitaxy
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02529—Silicon carbide
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/0257—Doping during depositing
- H01L21/02573—Conductivity type
- H01L21/02576—N-type
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/0257—Doping during depositing
- H01L21/02573—Conductivity type
- H01L21/02579—P-type
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
Definitions
- An embodiment of the present invention relates to a SiC epitaxial growth device.
- the SiC epitaxial growth device is one of the epitaxial growth devices that uniformly deposits a thin film on a single crystal substrate having a large area.
- the SiC epitaxial growth apparatus forms a SiC single crystal thin film on a substrate using a process gas containing silicon (Si), carbon (C), or the like.
- the SiC epitaxial growth apparatus discharges by-products generated by the film formation of SiC.
- By-products generally have a risk of explosion, and especially when chlorine is contained in the film-forming gas, fluid by-products are produced, and special consideration for safety is required for removal.
- An embodiment of the present invention provides a SiC epitaxial growth apparatus capable of reducing the frequency of valve replacement and cleaning because by-products associated with the epitaxial growth of SiC are unlikely to remain in a valve provided in the middle of the discharge path. ..
- the SiC epitaxial film forming apparatus has a chamber in which a raw material gas containing at least silicon and carbon is introduced and can accommodate a substrate formed by the raw material gas, and a by-product generated by the film formation of the substrate. It is provided with a pipe for discharging a gas containing an object from the chamber and a valve for pressure control provided in the middle of the pipe.
- the valve has an inflow port for gas to flow in from the upstream portion of the pipe communicating the chamber and the valve, and an outlet for gas flowing out to the downstream part of the pipe communicating with the upstream portion via the valve.
- a part of the upstream part is provided at least at a position lower than the inlet, and a part of the downstream part is provided at a position lower than the outlet.
- by-products associated with the epitaxial growth of SiC are less likely to remain in the valve provided in the middle of the discharge path, and the frequency of valve replacement can be reduced.
- FIG. 1 is a diagram showing a schematic configuration of a SiC epitaxial growth apparatus according to a first embodiment.
- a semiconductor wafer W is used as a substrate to be subjected to an epitaxial growth process, and a single film or a plurality of thin films are laminated on the semiconductor wafer W for vapor phase epitaxial growth.
- the SiC epitaxial growth device 1 shown in FIG. 1 includes a chamber 10, a pipe 20, a valve 30, a trap unit 40, a pump 50, a pressure sensor 60, a control unit 70, and an abatement device 80.
- a chamber 10 a pipe 20
- a valve 30 a trap unit 40
- a pump 50 a pressure sensor 60
- a control unit 70 a control unit 70
- an abatement device 80 an abatement device 80.
- the semiconductor wafer W is housed in the chamber 10 in a state of being placed on the stage 11.
- the number of wafers to be mounted may be one, or a plurality of wafers may be mounted at the same time.
- the process gas G1 is introduced into the chamber 10.
- the process gas G1 contains silicon, carbon, and chlorine (Cl).
- silicon for example, monosilane (SiH 4 ), dichlorosilane (SiH 2 Cl 2 ), or trichlorsilane (SiHCl 3 ) can be used.
- As the gas containing carbon for example, propane (C 3 H 8 ) or acetylene (C 2 H 2 ) can be used.
- the gas containing chlorine for example, hydrogen chloride (HCl) can be used. Further, hydrogen (H 2 ) or argon (Ar) may be simultaneously flowed as one of the process gases as the carrier gas. Further, nitrogen (N 2 ) or trimethylaluminum (TMAl) may be added as the dopant gas.
- a heating source such as a heater, a SiC single crystal thin film is formed on the semiconductor wafer W at the same time. , By-products are produced.
- the by-product is a polymer containing at least silicon, hydrogen (H), chlorine, and carbon.
- the exhaust gas G2 is discharged from the chamber 10 to the pipe 20, so that a by-product which is a polymer is generated in a portion where the gas can flow after the pipe 20.
- the pipe 20 has an upstream portion 21 that communicates with the chamber 10 and the valve 30, and a downstream portion 22 that communicates with the upstream portion 21 via the valve 30.
- one end of the upstream portion 21 is connected to the bottom surface of the chamber 10 as shown in FIG.
- one end of the upstream portion 21 may be connected to the side surface of the chamber 10.
- Each of the upstream portion 21 and the downstream portion 22 is curved in a U shape as shown in FIG. That is, there is a curved portion at the bottom.
- a valve 30 is installed between the upper end of the upstream portion 21 and the upper end of the downstream portion 22.
- the valve 30 has a valve box 31 and a valve body 32.
- the valve box 31 is provided with an inflow port 31a and an outflow port 31b.
- Exhaust gas G2 discharged from the chamber 10 to the upstream portion 21 of the pipe 20 flows into the inflow port 31a.
- the inflow port 31a is opened in the horizontal direction and is connected to the upper end portion of the upstream portion 21 curved in a U shape.
- the outflow port 31b causes the exhaust gas G2 that has flowed into the inflow port 31a to flow out to the downstream portion 22.
- the outlet 31b is opened vertically downward and is connected to the upstream upper end portion of the downstream portion 22 curved in a U shape.
- the valve body 32 operates in the valve box 31 based on the control of the control unit 70.
- the operation of the valve body 32 changes the opening degree of the valve 30, in other words, the flow pressure of the exhaust gas G2 at the inflow port 31a.
- the internal pressure of the upstream portion 21 of the pipe 20 and the chamber 10 can be controlled.
- the trap portion 40 is installed at the lower end of the downstream portion 22 curved in a U shape. That is, the trap portion 40 is installed at a position lower than the valve 30. As a result, the by-product X discharged from the outlet 31b of the valve 30 is stored in the lower part of the trap portion 40. Further, as shown in FIG. 1, the lower part of the trap portion 40 is provided below the pipe 22, and the inner diameter d1 of the trap portion 40 is sufficiently larger than the inner diameter d2 of the pipe 22.
- the trap portion 40 since the trap portion 40 has a sufficiently large cross-sectional area with respect to the pipe 22 on the plane perpendicular to the flow direction of the exhaust gas G2, even if the by-product X is stored in the trap portion 40, the flow of the exhaust gas G2 A road is secured in the trap portion 40. Therefore, the flow of the exhaust gas G2 in the downstream portion 22 is not obstructed.
- the trap unit 40 needs to be replaced. Therefore, it is desirable that at least the downstream portion 22 of the trap portion 40 is replaceably attached.
- the method of attaching the trap portion 40 to the downstream portion 22 is not particularly limited, but it is desirable that the trap portion 40 is a simple method so as to shorten the time required for the replacement work. Further, the trap portion 40 may be provided not only in the downstream portion 22 but also in the upstream portion 21.
- the pump 50 is a vacuum pump installed downstream of the trap portion 40.
- the pump 50 operates to reduce the pressure in the pipe 20 and the chamber 10 in a vacuum state. By this decompression operation, the exhaust gas G2 is sucked from the chamber 10 into the pipe 20.
- the pressure sensor 60 is installed in the chamber 10. Alternatively, it may be installed in the upstream portion 21 of the pipe 20. The pressure sensor 60 detects the internal pressure of the chamber 10 and outputs it to the control unit 70.
- the control unit 70 receives the result of monitoring the pressure inside the chamber 10 in the SiC epitaxial growth device 1 by the pressure sensor 60, and sets the pressure in the chamber 10 to a pressure suitable for gas phase epitaxial growth, for example, 200 Torr, or The opening degree of the valve 30 is controlled so that the pressure becomes appropriate for each step of the film forming process, and the introduction of the process gas G1 and the discharge of the exhaust gas G2 are controlled.
- the abatement device 80 is provided to remove or detoxify harmful gas contained in the exhaust gas G2 so that it can be released into the atmosphere.
- FIG. 2 is a diagram showing a schematic configuration of a SiC epitaxial growth apparatus according to a comparative example.
- the same components as those of the SiC epitaxial growth apparatus 1 shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.
- the valve 30 is connected to the downstream portion 22 of the pipe 20 at a position lower than the trap portion 40. Further, the outlet 31b of the valve 30 is opened vertically upward. Therefore, the by-product X contained in the exhaust gas G2 tends to adhere to the inside of the valve box 31 of the valve 30.
- the outlet 31b of the valve 30 is opened vertically downward. Therefore, the by-product X adhering to the vicinity of the outlet 31b in the valve box 31 is urged to be discharged from the outlet 31b by gravity. As a result, the by-product X is less likely to adhere to the inside of the valve box 31, so that the frequency of replacement of the valve 30 can be reduced.
- the outlet 31b is opened vertically downward, but the by-product X generated near the valve body 32 inside the valve 30 is directed downward so as to be prompted to be discharged from the outlet 31b by gravity.
- Any structure may be used as long as it has an open structure.
- the outlet 31b of the valve 30 may be opened diagonally downward.
- the structure may be such that by-products do not accumulate and discharge from the valve 30 is promoted. That is, when the outlet 31b is open in the horizontal direction, the pipe connected to the outlet also faces the horizontal direction, but if the length of the horizontal portion is sufficiently short with respect to the pipe diameter, a by-product Will be promoted to be discharged without accumulating in the valve 30.
- the amount that does not flow to the trap portion 40 and accumulates in the horizontal portion should be as small as possible in consideration of the frequency of pipe replacement and cleaning, so it is more preferably 2 times or less, and further preferably 1 time. It is as follows.
- the trap portion 40 thicker than the pipe 20 (larger pipe cross-sectional area) is connected to the downstream portion 22 at a position lower than the valve 30. Therefore, the by-product X is more likely to accumulate in the trap portion 40 than in the valve 30. Further, the by-product X can be stored in the trap portion 40 without obstructing the flow of the exhaust gas G2 in the downstream portion 22.
- the trap portion 40 may be arranged on the downstream side of the lowermost portion 21a of the upstream portion 21 as shown in FIG. 7A, or on the upstream side of the lowermost portion 22a of the downstream portion 22 as shown in FIG. 7B. It can also be provided. That is, the trap portion 40 may be provided between the lowermost portion 21a of the upstream portion 21 and the lowermost portion 22a of the downstream portion 22.
- valve 30 may have the inflow port 31a opened vertically upward and the outlet 31b may be opened vertically downward.
- valve 30 may have the inflow port 31a and the outflow port 31b open in the horizontal direction opposite to each other.
- the length of the pipe 22 connected from the discharge port 31b of the valve is 16 times or less the inner diameter D of the pipe as described above.
- the same examination as for the pipe connected to the discharge port was carried out for the pipe 21 connected from the inflow port 31a of the valve, the same result as in FIG. 6 was obtained.
- the length of the horizontal portion of the pipe 21 connected to the inflow port 31a of the valve is 16 times or less the diameter of the exhaust pipe. It is preferably 2 times or less, more preferably 1 time or less.
- the trap portion 40 may have a structure in which the by-product X is stored not in the middle of the pipe 21 but in a portion branched from the lowermost portion. With this structure, the trap portion 40 can be replaced by simply removing the pipe 21 at one place.
- valve V in the middle of the vertical pipe 21b connecting the pipe 21 and the trap portion 40.
- the valve V is opened and the by-product X is stored in the trap portion 40.
- the error! Link is incorrect.
- the valve V is closed at the timing when the valve V is not flown, the downstream side of the valve V is set to atmospheric pressure by a pressure adjusting mechanism (not shown), and the trap portion 40 is removed by the disconnection portion 21c. Then, the by-product X accumulated in the trap portion 40 is removed from the trap portion 40, and the inside is preferably washed with water or the like.
- the trap portion 40 is reconnected, the pressure is reduced by a pressure adjusting mechanism (not shown), the valve V is opened to make the pressure equal to that of the pipe 21, and then the film is formed. By doing so, when the trap portion 40 is removed, it is not necessary to release the entire pipe 20 to the atmosphere, and workability can be improved.
- the error! Link is incorrect.
- the valve V is closed and the reaction by-product X is stored in the pipe 21. Error! The link is incorrect.
- the valve V is opened at a timing that does not allow the flow of water, and the by-products accumulated in the pipe 21 are transferred to the trap portion 40.
- the downstream side of the valve V is set to atmospheric pressure by a pressure adjusting mechanism (not shown), and the trap portion 40 is removed by the disconnection portion 21c.
- the pipe 21 may be branched and valves Vi, Vo and a trap portion 40 may be provided in each line.
- the by-product X is accumulated only in the trap portion 40 connected to the one line.
- the pressure of one line where the by-products are no longer accumulated is reduced by a pressure adjustment mechanism (not shown), and then Vi and Vo on both sides of the line are opened, and then Vi and Vo on both sides of the line where the by-products are accumulated can be closed, the pressure can be adjusted to atmospheric pressure by a pressure adjusting mechanism (not shown), and the trap portion 40 can be removed by the disconnection portion 21c.
- a pressure adjusting mechanism not shown
- the trap portion 40 can be removed by the disconnection portion 21c.
- FIG. 10 is a diagram showing a schematic configuration of the SiC epitaxial growth apparatus according to the second embodiment.
- the same components as those of the SiC epitaxial growth apparatus 1 shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.
- the outlet 31b of the valve 30 opens horizontally and is connected to the downstream portion 22 of the pipe 20, while the inlet 31a opens vertically downward and the upstream portion 21. It is connected to the. Therefore, the by-product X adhering to the vicinity of the inflow port 31a in the valve box 31 when the exhaust gas G2 is discharged is urged to be discharged from the inflow port 31a to the upstream portion 21 by gravity. Therefore, the by-product X is less likely to adhere to the inside of the valve box 31, and the frequency of replacement of the valve 30 can be reduced.
- the inflow port 31a may be opened diagonally downward and connected to the upstream portion 21.
- a trap portion 40 is installed at a position lower than the valve 30 in the upstream portion 21.
- the by-product X discharged from the inflow port 31a can be stored in the trap unit 40.
- the inner diameter d1 of the trap portion 40 is larger than the inner diameter d2 of the pipe 20. Therefore, the by-product X can be stored in the trap portion 40 without obstructing the flow of the exhaust gas G2 in the upstream portion 21. When the stored amount of the by-product X increases, the trap portion 40 needs to be replaced. Therefore, it is desirable that the trap portion 40 is replaceably attached to the upstream portion 21. Further, the trap portion 40 may be provided not only in the upstream portion 21 but also in the downstream portion 22.
- the upstream portion 21 of the valve 30 may have a horizontal portion, and in that case, the length of the horizontal portion shall be 16 times or less of the discharge pipe diameter. Is desirable. It is preferably 2 times or less, more preferably 1 time or less.
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Abstract
Description
図1は、第1実施形態に係るSiCエピタキシャル成長装置の概略的な構成を示す図である。本実施形態では、エピタキシャル成長処理を行う基板として半導体ウェハWを用い、この半導体ウェハW上に単一の膜を、あるいは複数の薄膜を積層して、気相エピタキシャル成長する例を説明する。
図10は、第2実施形態に係るSiCエピタキシャル成長装置の概略的な構成を示す図である。図10では、図1に示すSiCエピタキシャル成長装置1と同様の構成要素には同じ符号を付し詳細な説明を省略する。
Claims (10)
- 少なくともシリコンおよび炭素を含むプロセスガスが導入され、前記プロセスガスによりエピタキシャル成長される基板を収容可能なチャンバと、
前記基板上へのエピタキシャル成長に伴って生成された副生成物を含んだガスを前記チャンバから排出する配管と、
前記配管の途中に設けられた圧力制御用のバルブと、を備え、
前記バルブは、前記チャンバと前記バルブとを連通する前記配管の上流部分から前記ガスが流入する流入口と、前記バルブを介して前記上流部分と連通する前記配管の下流部分へ前記ガスを流出する流出口と、を有し、少なくとも前記流入口より低い位置に前記上流部分の一部が、または前記流出口より低い位置に前記下流部分の一部が設けられるSiCエピタキシャル成長装置。 - 前記プロセスガスは、塩素を含む請求項1のSiCエピタキシャル成長装置。
- 少なくとも前記流入口および前記流出口のいずれかが下向きの配管と連通する請求項1のSiCエピタキシャル成長装置。
- 少なくとも前記流入口および流出口のいずれかと連通する前記配管は、水平部分を有し、前記水平部分の長さは、前記水平部分の直径の16倍以下である、請求項1のSiCエピタキシャル成長装置。
- 前記上流部分および前記下流部分の各々は、各々の両端部間に配置される最下部を有し、
前記バルブは、前記上流部分の前記最下部と、前記下流部分の前記最下部との間に配置される、請求項1に記載のSiCエピタキシャル成長装置。 - 前記上流部分または前記下流部分における前記バルブよりも低い位置で前記副生成物を貯留可能なトラップ部をさらに備える、請求項1に記載のSiCエピタキシャル成長装置。
- 前記トラップ部は、前記配管に設けられ、排ガスの流れる方向に垂直な面において、前記配管に対して大きい断面積を有する請求項6に記載のSiCエピタキシャル成長装置。
- 前記トラップ部は、前記上流部分または前記下流部分より取り外し可能である、請求項6に記載のSiCエピタキシャル成長装置。
- 少なくとも前記トラップ部の前記上流部分および前記下流部分のいずれかに、少なくとも前記トラップ部より高い位置に配置される前記配管を有する、請求項6のSiCエピタキシャル成長装置。
- 前記トラップ部は、少なくとも前記上流部分の最下部、および前記下流部分の最下部のいずれかに配置されている、請求項6に記載のSiCエピタキシャル成長装置。
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KR1020217020211A KR102679507B1 (ko) | 2019-04-15 | 2020-04-08 | SiC 에피택셜 성장 장치 |
JP2021514909A JP7214848B2 (ja) | 2019-04-15 | 2020-04-08 | SiCエピタキシャル成長装置 |
CN202080007995.8A CN113260742A (zh) | 2019-04-15 | 2020-04-08 | SiC外延生长装置 |
EP20790913.6A EP3957777A4 (en) | 2019-04-15 | 2020-04-08 | DEVICE FOR EPITACTIC GROWING OF SIC |
US17/477,055 US20220005696A1 (en) | 2019-04-15 | 2021-09-16 | SiC EPITAXIAL GROWTH APPARATUS |
JP2023005373A JP7386365B2 (ja) | 2019-04-15 | 2023-01-17 | SiCエピタキシャル成長装置およびSiCエピタキシャル成長装置の副生成物除去方法 |
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CN113260742A (zh) | 2021-08-13 |
EP3957777A1 (en) | 2022-02-23 |
KR102679507B1 (ko) | 2024-07-01 |
TWI753402B (zh) | 2022-01-21 |
JP7386365B2 (ja) | 2023-11-24 |
KR20210095686A (ko) | 2021-08-02 |
US20220005696A1 (en) | 2022-01-06 |
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