WO2012147231A1 - シリコン結晶成長用石英坩堝のコーティング方法及びシリコン結晶成長用石英坩堝 - Google Patents
シリコン結晶成長用石英坩堝のコーティング方法及びシリコン結晶成長用石英坩堝 Download PDFInfo
- Publication number
- WO2012147231A1 WO2012147231A1 PCT/JP2011/077934 JP2011077934W WO2012147231A1 WO 2012147231 A1 WO2012147231 A1 WO 2012147231A1 JP 2011077934 W JP2011077934 W JP 2011077934W WO 2012147231 A1 WO2012147231 A1 WO 2012147231A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating
- silicon crystal
- crucible
- bubble
- devitrification
- Prior art date
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Classifications
-
- 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
- C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
- C30B15/10—Crucibles or containers for supporting the melt
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B20/00—Processes specially adapted for the production of quartz or fused silica articles, not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
-
- 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
- C30B29/02—Elements
- C30B29/06—Silicon
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
- Y10T117/10—Apparatus
- Y10T117/1024—Apparatus for crystallization from liquid or supercritical state
- Y10T117/1032—Seed pulling
Definitions
- the present invention relates to a coating method for forming a coating with a devitrification layer for preventing silicon oxide from being mixed into a raw material melt in a quartz crucible for silicon crystal growth that stores the raw material melt in the production of silicon crystals.
- the crucible used for containing the raw material melt in the Czochralski method for growing a single crystal is coated on its inner surface to prevent impurities from entering the raw material melt from the crucible. This coating has a great influence on the quality and yield of single crystals, and various studies have been conducted.
- a devitrification accelerator is attached to the inner surface of a crucible for containing a molten semiconductor material in a Czochralski method for growing a single crystal at a temperature of about 600 ° C. or less.
- a method of heating to a temperature exceeding 600 ° C. and forming a substantially devitrified silica layer on the inner surface is disclosed.
- the devitrification promoter include those containing an alkaline earth metal selected from the group consisting of calcium, barium, magnesium, strontium and beryllium.
- a stable seed crystal nucleus is formed at the nucleation site brought about by the devitrification promoter during the Czochralski method, especially during polysilicon melting, and at the crucible surface.
- the vitreous silica crystallizes and a substantially homogeneous and continuous ⁇ -cristobalite devitrification shell is formed on the crucible surface. Since the substantially homogeneous and continuous devitrification shell (corresponding to the devitrification coating in the present invention) formed on the inner surface of the crucible dissolves homogeneously upon contact with the molten raw material (silicon melt), ⁇ -cristobalite Release of particles into the melt is suppressed, and dislocations formed in the growing crystal can be minimized.
- a devitrification shell is formed in the outer surface of a crucible, there also exists an advantage that a crucible can be strengthened.
- the above method employs barium hydroxide as a devitrification accelerator and is actually widely adopted, it is difficult to form a uniform devitrification shell (devitrification coating) on the entire surface of the crucible. Although it has pinholes in some places, it will be formed. However, if these pinholes have small diameters, the raw material melt cannot normally flow in due to its viscosity, and this is not a big problem in producing crystals. Moreover, even if the diameter is such that the raw material melt can flow in, if the area where the raw material melt and the quartz constituting the crucible contact is small, the contamination of the impurities into the raw material melt will be extremely low. It is not a big problem in producing crystals.
- an object of the present invention is to provide a method for coating a quartz crucible for silicon crystal growth that can keep the diameter of a pinhole formed in a devitrification coating small.
- a bubble-free quartz layer having a thickness of 80 ⁇ m or more and 4 mm or less is formed on the inner surface of a quartz crucible for silicon crystal growth, and the surface of the bubble-free quartz layer is coated with an alkaline earth hydroxide. The surface is heated to a temperature at which devitrification occurs.
- the coating may be performed by immersing the inner surface in the alkaline earth hydroxide solution. Further, the heating may be performed before filling the quartz crucible for silicon crystal growth with a solid raw material of a molten raw material.
- the surface of the transparent quartz layer having a thickness of 80 ⁇ m or more and 4 mm or less and the bubble-free quartz layer is coated with alkaline earth hydroxide, and then devitrification occurs on the surface. It has a devitrification coating formed by heating to a temperature above that.
- the quartz layer on which the devitrification coating is formed does not include bubbles, and the surface thereof is extremely smooth, so that the pinhole formed when devitrification occurs is generated.
- the diameter can be kept small.
- the quartz crucible is generally composed of white turbid quartz in order to obtain the required strength, but the present inventor considered that the bubbles contained in the white turbid quartz and the surface roughness of the white turbid quartz layer. It has been found that the variation in the coating thickness of the devitrification accelerator due to the thickness forms a pinhole having a large diameter in the devitrification coating. The present invention is based on this new knowledge.
- the bubble-free quartz layer has a thickness of at least 80 ⁇ m, a devitrification coating can be formed, but if it is too thick, the strength of the crucible becomes insufficient. Therefore, the thickness of the bubble-free quartz layer needs to be 4 mm or less.
- the quartz crucible for silicon crystal growth according to the present invention has a devitrification coating formed by the coating method according to the present invention, the pinhole diameter is extremely small, and the quartz layer is not damaged even when used repeatedly. Absent.
- barium hydroxide was applied to a bubble-free quartz layer having a thickness of 4 mm, and a devitrification coating was formed on the bubble-free quartz layer during the production of a single crystal. And the surface of the devitrification coating after manufacturing a single crystal was confirmed visually, and it image
- DH-2400DP product name, Hilox Co., Ltd.
- the photographing magnification of the objective lens was 100 times, and photographing was performed for each of the specimens of the example and the comparative example with the same setting state.
- digital camera photographs of fracture surfaces of the quartz layer on which the devitrification coatings of the examples and comparative examples are formed are shown in FIGS.
- FIG. 1 shows a comparatively large pinhole in an example visually confirmed
- FIG. 2 shows a pinhole in a comparative example taken under the same conditions.
- the pinhole in the embodiment has a small diameter, and the area where the quartz layer is exposed is extremely small, so that the possibility of damage due to the inflow of the molten raw material is low.
- the pinhole shown in FIG. there is a portion where the quartz layer is largely exposed at the bottom of the pinhole, and there is a high possibility that the molten material that has flowed into the pinhole is damaged.
- the upper layer is a bubble-free quartz layer.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Glass Melting And Manufacturing (AREA)
- Glass Compositions (AREA)
- Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)
Abstract
Description
Claims (4)
- シリコン結晶成長用石英坩堝の内面に厚さ80μm以上4mm以下の無気泡石英層を形成し、前記無気泡石英層の表面をアルカリ土類水酸化物で被覆した後、前記表面に失透が発生する温度以上に加熱することを特徴とするコーティング方法。
- 前記被覆は、前記内面を前記アルカリ土類水酸化物の溶液に浸漬させて行なう請求項1に記載のコーティング方法。
- 前記加熱は、前記シリコン結晶成長用坩堝に、溶融原料の固体原料を充填する前に行なう請求項1または2に記載のコーティング方法。
- 厚さ80μm以上4mm以下の無気泡石英層と、前記無気泡石英層の表面をアルカリ土類水酸化物で被覆した後、前記表面に失透が発生する温度以上に加熱することにより形成した失透コーティングを有することを特徴とするシリコン結晶成長用石英坩堝。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/114,002 US9593432B2 (en) | 2011-04-28 | 2011-12-02 | Coated silica crucible having a bubble-free layer, and method of producing the same |
CN201180004906.5A CN102858708B (zh) | 2011-04-28 | 2011-12-02 | 硅结晶生长用石英坩埚的涂敷方法及硅结晶生长用石英坩埚 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011100295A JP4854814B1 (ja) | 2011-04-28 | 2011-04-28 | シリコン結晶成長用石英坩堝のコーティング方法及びシリコン結晶成長用石英坩堝 |
JP2011-100295 | 2011-04-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012147231A1 true WO2012147231A1 (ja) | 2012-11-01 |
Family
ID=45604489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/077934 WO2012147231A1 (ja) | 2011-04-28 | 2011-12-02 | シリコン結晶成長用石英坩堝のコーティング方法及びシリコン結晶成長用石英坩堝 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9593432B2 (ja) |
JP (1) | JP4854814B1 (ja) |
KR (1) | KR101325628B1 (ja) |
CN (1) | CN102858708B (ja) |
WO (1) | WO2012147231A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6743753B2 (ja) * | 2017-04-27 | 2020-08-19 | 株式会社Sumco | シリコン単結晶の引上げ方法 |
DE112018002317T5 (de) * | 2017-05-02 | 2020-03-26 | Sumco Corporation | Quarzglastiegel und herstellungsverfahren dafür |
US20240011183A1 (en) * | 2020-12-18 | 2024-01-11 | Sumco Corporation | Quartz glass crucible, manufacturing method therefor, and method for manufacturing silicon single crystal |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09110579A (ja) * | 1995-06-14 | 1997-04-28 | Memc Electron Materials Inc | 単結晶の無転位収量の改善方法 |
JP2008081398A (ja) * | 2006-09-28 | 2008-04-10 | Heraeus Shin-Etsu America Inc | バリウムドープされた内壁を有するシリカガラスるつぼ |
JP2009512619A (ja) * | 2005-10-19 | 2009-03-26 | モーメンティブ・パフォーマンス・マテリアルズ・インク | 石英ガラスるつぼと石英ガラスるつぼの表面処理方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5976247A (en) * | 1995-06-14 | 1999-11-02 | Memc Electronic Materials, Inc. | Surface-treated crucibles for improved zero dislocation performance |
US6510707B2 (en) * | 2001-03-15 | 2003-01-28 | Heraeus Shin-Etsu America, Inc. | Methods for making silica crucibles |
US7118789B2 (en) | 2001-07-16 | 2006-10-10 | Heraeus Shin-Etsu America | Silica glass crucible |
JP2003095678A (ja) | 2001-07-16 | 2003-04-03 | Heraeus Shin-Etsu America | シリコン単結晶製造用ドープ石英ガラスルツボ及びその製造方法 |
US6641663B2 (en) | 2001-12-12 | 2003-11-04 | Heracus Shin-Estu America | Silica crucible with inner layer crystallizer and method |
US20030012899A1 (en) | 2001-07-16 | 2003-01-16 | Heraeus Shin-Etsu America | Doped silica glass crucible for making a silicon ingot |
US7383696B2 (en) | 2005-09-08 | 2008-06-10 | Heraeus Shin-Etsu America, Inc. | Silica glass crucible with bubble-free and reduced bubble growth wall |
CN201762478U (zh) | 2010-08-25 | 2011-03-16 | 扬州华尔光电子材料有限公司 | 一种多晶硅铸锭用涂层石英坩埚 |
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2011
- 2011-04-28 JP JP2011100295A patent/JP4854814B1/ja not_active Expired - Fee Related
- 2011-07-19 KR KR1020110071656A patent/KR101325628B1/ko active IP Right Grant
- 2011-12-02 US US14/114,002 patent/US9593432B2/en active Active
- 2011-12-02 CN CN201180004906.5A patent/CN102858708B/zh active Active
- 2011-12-02 WO PCT/JP2011/077934 patent/WO2012147231A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09110579A (ja) * | 1995-06-14 | 1997-04-28 | Memc Electron Materials Inc | 単結晶の無転位収量の改善方法 |
JP2009512619A (ja) * | 2005-10-19 | 2009-03-26 | モーメンティブ・パフォーマンス・マテリアルズ・インク | 石英ガラスるつぼと石英ガラスるつぼの表面処理方法 |
JP2008081398A (ja) * | 2006-09-28 | 2008-04-10 | Heraeus Shin-Etsu America Inc | バリウムドープされた内壁を有するシリカガラスるつぼ |
Also Published As
Publication number | Publication date |
---|---|
US20140150714A1 (en) | 2014-06-05 |
US9593432B2 (en) | 2017-03-14 |
KR101325628B1 (ko) | 2013-11-06 |
JP2012232857A (ja) | 2012-11-29 |
JP4854814B1 (ja) | 2012-01-18 |
CN102858708B (zh) | 2015-11-25 |
CN102858708A (zh) | 2013-01-02 |
KR20120122851A (ko) | 2012-11-07 |
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