JP7168288B2 - シリコン切粉を電子級ポリシリコンまたは冶金級シリコンにリサイクルする方法 - Google Patents
シリコン切粉を電子級ポリシリコンまたは冶金級シリコンにリサイクルする方法 Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 212
- 229910052710 silicon Inorganic materials 0.000 title claims description 203
- 239000010703 silicon Substances 0.000 title claims description 199
- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims description 44
- 229920005591 polysilicon Polymers 0.000 title claims description 42
- 238000000034 method Methods 0.000 claims description 97
- 239000002245 particle Substances 0.000 claims description 90
- 239000011856 silicon-based particle Substances 0.000 claims description 81
- 238000005520 cutting process Methods 0.000 claims description 33
- 239000010808 liquid waste Substances 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims 1
- 230000008569 process Effects 0.000 description 50
- 235000012431 wafers Nutrition 0.000 description 33
- 238000004064 recycling Methods 0.000 description 29
- 238000004519 manufacturing process Methods 0.000 description 24
- 239000000463 material Substances 0.000 description 21
- 239000000758 substrate Substances 0.000 description 18
- 239000002019 doping agent Substances 0.000 description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 239000000356 contaminant Substances 0.000 description 11
- 239000006227 byproduct Substances 0.000 description 10
- 238000012545 processing Methods 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000013459 approach Methods 0.000 description 7
- 239000002826 coolant Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 5
- 239000002173 cutting fluid Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 5
- 239000005052 trichlorosilane Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005056 compaction Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000011863 silicon-based powder Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000002178 crystalline material Substances 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011825 aerospace material Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000004821 distillation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000005374 membrane filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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- 238000005498 polishing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/037—Purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/04—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools
- B28D5/042—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools by cutting with blades or wires mounted in a reciprocating frame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/0256—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by the material
- H01L31/0264—Inorganic materials
- H01L31/028—Inorganic materials including, apart from doping material or other impurities, only elements of Group IV of the Periodic Table
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic Table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/04—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/547—Monocrystalline silicon PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Silicon Compounds (AREA)
Description
本出願は、「METHOD OF RECYCLING SILICON SWARF INTO ELECTRONIC GRADE POLYSILICON」と題された、2017年4月19日出願の米国仮特許出願第62/487,447号の利益を主張し、その内容全体が、参照により本明細書に組み込まれる。本出願は、「METHOD OF RECYCLING SILICON SWARF INTO METALLURGICAL GRADE SILICON」と題された、2017年4月19日出願の米国仮特許出願第62/487,452号の利益も主張し、その内容全体が、参照により本明細書に組み込まれる。
以下のパラグラフは、本開示(添付の「特許請求の範囲」を含む)で使用されている用語に関する、定義および/またはコンテキストを提供する。
Claims (11)
- シリコンインゴットを切断して、前記シリコンインゴットをウェハ部分と、1ミクロン未満の平均粒径を有する複数のシリコン粒子を含むシリコン切粉とに分けることと、
前記シリコン切粉をシリコン凝集体に圧縮することと、
前記シリコン凝集体を加熱及び脱水して複数の冶金級シリコン粒子を形成することであって、前記複数の冶金級シリコン粒子は、50ミクロンから10mmの範囲の粒径を有する、加熱及び脱水することと、
前記複数の冶金級シリコン粒子を粉砕して、前記複数の冶金級シリコン粒子の粒径を1000ミクロン未満に低減させることと、
を備え、
前記シリコン切粉を圧縮することが、前記シリコン切粉を遠心分離することを含み、
前記シリコン凝集体を加熱することは、前記シリコン凝集体を含む遠心管を、炉内に配置することを含む、
方法。 - 前記シリコンインゴットを切断することが、ダイヤモンドワイヤー切断プロセスを使用して前記シリコンインゴットをソーイングすることを含む、請求項1に記載の方法。
- 前記シリコン切粉が前記複数のシリコン粒子と液体廃棄物との混合物であり、前記シリコン切粉を遠心分離することが、前記液体廃棄物を前記複数のシリコン粒子から分離し、前記複数のシリコン粒子を前記シリコン凝集体に圧縮する、請求項1または2に記載の方法。
- 前記シリコン凝集体の水分含有量が、前記複数の冶金級シリコン粒子の水分含有量の少なくとも2倍である、請求項1から3のいずれか一項に記載の方法。
- 前記加熱及び脱水において形成された前記複数の冶金級シリコン粒子の前記粒径が、70~100ミクロンの範囲である、請求項1から4のいずれか一項に記載の方法。
- 前記加熱及び脱水において形成された前記複数の冶金級シリコン粒子の前記粒径は、直径が、100ミクロンよりも大きいサイズを有する、請求項1から4のいずれか一項に記載の方法。
- 前記粉砕された複数の冶金級シリコン粒子の前記粒径が500ミクロンよりも大きい、請求項1から6のいずれか一項に記載の方法。
- 前記粉砕された複数の冶金級シリコン粒子の前記粒径のサイズが、10ミクロン未満である、請求項1から6のいずれか一項に記載の方法。
- 前記粉砕された複数の冶金級シリコン粒子の第1のサブセットを、前記粉砕された複数の冶金級シリコン粒子の第2のサブセットから分離することをさらに備える、請求項1から8のいずれか一項に記載の方法。
- 前記第1のサブセットは、少なくとも1ミクロンの粒径のサイズを有する、請求項9に記載の方法。
- 前記粉砕された複数の冶金級シリコン粒子を電子級ポリシリコン粒子に精製することをさらに備え、前記粉砕された複数の冶金級シリコン粒子が第1の純度を有し、前記電子級ポリシリコン粒子が前記第1の純度よりも高い第2の純度を有する、請求項1から10のいずれか一項に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US201762487452P | 2017-04-19 | 2017-04-19 | |
US201762487447P | 2017-04-19 | 2017-04-19 | |
US62/487,447 | 2017-04-19 | ||
US62/487,452 | 2017-04-19 | ||
PCT/US2018/012831 WO2018194729A1 (en) | 2017-04-19 | 2018-01-08 | Methods of recycling silicon swarf into electronic grade polysilicon or metallurgical-grade silicon |
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JP2020517567A JP2020517567A (ja) | 2020-06-18 |
JP7168288B2 true JP7168288B2 (ja) | 2022-11-09 |
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US (2) | US11784276B2 (ja) |
JP (1) | JP7168288B2 (ja) |
CN (1) | CN110536865A (ja) |
NO (1) | NO20191307A1 (ja) |
WO (1) | WO2018194729A1 (ja) |
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CN112195513A (zh) * | 2020-11-02 | 2021-01-08 | 南通大学 | 一种基于硅废料分级的再生多晶硅铸锭工艺 |
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JP2014094866A (ja) | 2012-11-12 | 2014-05-22 | Panasonic Corp | シリコン純化方法 |
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US4193975A (en) * | 1977-11-21 | 1980-03-18 | Union Carbide Corporation | Process for the production of improved refined metallurgical silicon |
JPS5913444B2 (ja) * | 1977-11-21 | 1984-03-29 | ユニオン・カ−バイド・コ−ポレ−シヨン | 精製された金属シリコン製造方法 |
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JP2002293528A (ja) | 2001-03-30 | 2002-10-09 | Sharp Corp | 太陽電池用シリコンの製造方法 |
JP2014094866A (ja) | 2012-11-12 | 2014-05-22 | Panasonic Corp | シリコン純化方法 |
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