WO2004020705A1 - エピタキシャルウエーハとその製造方法 - Google Patents
エピタキシャルウエーハとその製造方法 Download PDFInfo
- Publication number
- WO2004020705A1 WO2004020705A1 PCT/JP2003/010390 JP0310390W WO2004020705A1 WO 2004020705 A1 WO2004020705 A1 WO 2004020705A1 JP 0310390 W JP0310390 W JP 0310390W WO 2004020705 A1 WO2004020705 A1 WO 2004020705A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wafer
- epitaxial
- epitaxy
- single crystal
- silicon single
- Prior art date
Links
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
- 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
-
- 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
- C30B25/18—Epitaxial-layer growth characterised by the substrate
- C30B25/20—Epitaxial-layer growth characterised by the substrate the substrate being of the same materials as the epitaxial layer
-
- 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
- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
-
- 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
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02373—Group 14 semiconducting materials
- H01L21/02381—Silicon, silicon germanium, germanium
-
- 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
- H01L21/02367—Substrates
- H01L21/02433—Crystal orientation
-
- 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
- H01L21/02532—Silicon, silicon germanium, germanium
Definitions
- the present invention relates to an epitaxy wafer having reduced pit defects in an epitaxy layer, and in particular, to arsenic (As), which is apt to cause pit defects due to being subjected to gas etching before epitaxy film formation.
- the present invention relates to an epitaxial wafer in which the pit defects are reduced by using a wafer produced by cutting a silicon single crystal wafer to a specific plane orientation from the ingot, and a method of manufacturing the same.
- the (100) plane substrate's orphan that is, the inclination angle
- SEMI standard semiconductor Equipment and Materials International
- Japanese Patent Publication No. 3-61634 discloses that the inclination angle of the crystal axis is set to [011] with respect to the [100] axis in order to reduce micro defects during epitaxy, that is, tear drop. Angle of] 0 or [ ⁇ ], ⁇ of [0U] or [Oil], 5' ⁇ 2 °, and ⁇ 10 'or 5' ⁇ 2. And ⁇ 10 'are disclosed.
- the underline of a number indicating a direction means a line originally located on the number in crystallographic notation, and is supplemented as an underline for convenience of notation.
- the surface of the epitaxial wafer may be rougher than the surface of the substrate. It was difficult to control the micro-roughness of the surface.
- Japanese Patent No. 3081706 discloses a technique for defining the angle range of the cutting orientation to 30' ⁇ 2 ° and 30' ⁇ 2 °. Have been. Disclosure of the invention
- the present inventors have used a general ⁇ type low-resistance silicon single crystal wafer of about 3 to 5 mQ.cm in the manufacture of an epitaxial wafer, and used a wafer in a general manufacturing process. We found that if the surface was mirror-polished and HC1 gas etching was performed for cleaning before epitaxy growth, pits could occur in the deposited layer after epitaxy growth.
- An object of the present invention is to provide an epitaxy wafer in which pit defects in the epitaxy layer are reduced.
- the present invention is directed to an arsenic (As) -doped silicon single crystal wafer which is likely to have pit defects if gas etching is performed before the epitaxial film formation. It is an object of the present invention to provide an epitaxy wafer capable of suppressing generation of the pit defects even when a film is formed and obtaining a healthy epitaxy layer, and a method of manufacturing the epitaxy wafer.
- As arsenic
- the present inventors have conducted intensive studies on the plane orientation of the wafer and the inclination of the crystal axis for the purpose of reducing the pit defects in the epitaxial layer.
- the inventors have found that a sound epitaxy layer can be obtained by specifying an inclination angle different from the specified inclination angle, and completed the present invention. That is, in the epitaxial wafer according to the present invention, an epitaxial layer is grown on a wafer cut out of a silicon single crystal ingot having a specific resistance of 2.5 mQ.cm or more by doping arsenic.
- the plane orientation is (100), the angle ⁇ in the [001] or [00i] direction with respect to the [100] axis, and the angle in the [OiO] or [010] direction.
- the epitaxy layer was grown on the sliced wafer in the range inclined by the angle ⁇ (0.2 ° ⁇ and ⁇ 0.1 °, or 0.2 ° ⁇ ⁇ and ⁇ 0. ⁇ ) The feature is.
- the epitaxial wafer according to the present invention has an epitaxy film formed on the surface of the wafer that has been subjected to gas etching for cleaning before the epitaxy film formation, and a pit seen after the epitaxy film formation. It is characterized by having reduced
- the method for producing an epitaxial wafer according to the present invention comprises:
- the plane orientation of the wafer is (100), and the angle ⁇ and the angle ⁇ are in a specific range (0.2 ° ⁇ and ⁇ 0.1 °, or 0.2 ° ⁇ and ⁇ 0).
- the pit defects of the epitaxy layer are reduced by specifying the plane orientation inclination angle at the time of cutting without any special process and additional work in cutting the silicon single crystal.
- an epitaxy film is formed on an arsenic (As) -doped silicon single crystal wafer, which is subjected to gas etching prior to the epitaxy film formation and is likely to cause pit defects.
- As arsenic
- FIG. 1 is a graph showing a tilt range in which an epitaxial wafer according to the present invention is cut out from a silicon single crystal ingot, and the vertical axis represents a [001] direction or a [00i] direction from a [100] axis.
- the horizontal axis indicates the tilt angle in the [010] or [0 ⁇ 0] direction from the [100] axis, and the rectangular frame portion indicated along the vertical and horizontal axes indicates the present invention.
- silicon single crystal ingots and wafers are intended for use in the manufacture of epitaxial wafers, in which arsenic is doped and the specific resistance is 2.5 mQ'cm or more. . It is not necessary to set an upper limit on the specific resistance.
- the plane orientation of the wafer is (100), and in the (100) plane of the wafer, the crystal direction passes through the center of the wafer, [001], [001], [0 skin] [010] is the angle between the (100) plane normal and the wafer surface normal, and the angle in the [001] or [00i] direction with respect to the [100] axis.
- the component is an angle ⁇ , and the angle component in the [0i0] or [010] direction is an angle.
- the present invention is characterized in that the inclination angles ⁇ and ⁇ are controlled in a range of 0.2 ° ⁇ ⁇ and ⁇ 0.1 °, or in a range of 0.2 ° ⁇ ⁇ and ⁇ ⁇ 0.1 °.
- ⁇ is 0.2 ° or more, it is preferable that ⁇ is relatively larger than the other ⁇ , and it is preferable that there is a difference of 0.1 or more.
- ⁇ is 0.2 ° or more, it must be larger than the other ⁇ .
- the step of cutting a silicon single crystal ingot into a rework wafer is performed by accurately measuring the tilt in the crystal axis direction or a specific direction, and adjusting the tilt range according to the present invention to cut the wafer. Any slicing method using an inner peripheral blade or a wire saw can be adopted.
- any of the known manufacturing methods such as various polishing steps, mirror polishing steps, chamfering steps, and washing steps, depending on the purpose and required properties and cleanliness, etc.
- the process can be adopted, and the type of process to be selected and the execution order can be appropriately selected.
- the step of forming an epitaxial film on the wafer surface is not particularly limited, and any known method can be used so that a silicon epitaxial layer required as a substrate for semiconductor devices can be vapor-phase grown. It is also possible to use a phase film forming method and a vapor phase growth apparatus, and it is preferable to appropriately select source gas / film forming conditions according to the selected method and apparatus.
- the processing temperature is preferably from 1050 ° C to 1150 ° C.
- a step of performing gas etching on the wafer surface before forming the epitaxial film is employed. Specifically, as shown in the embodiment, a preparation stage for forming an epitaxial film, that is, replacing the hydrogen gas while raising the temperature in the chamber, for example, performing a hydrogen backing at a required temperature, followed by HC1 gas etching Then, a source gas is introduced under a required film forming atmosphere and temperature, and a vapor phase growth is performed to a required film thickness to form a silicon epitaxial layer.
- a temperature of 1050 ° C to 1200 ° C is preferable.
- an etching gas a chlorine compound gas in addition to HC1 gas can be used, and an etching amount is 0.5 mn or less from the surface. preferable.
- a silicon single crystal wafer with a 6-inch outer diameter doped with arsenic with a 6-inch outer diameter pulled up by the Czochralski method was used as a silicon single crystal wafer using a wire device (manufactured by Taira Toyama), and the resistivity was 4 mQ.
- the wafer After the wafer is mirror-polished and washed, it is subjected to a hydrogen bake for 1 minute in a hydrogen atmosphere of 115 CTC by a vapor phase epitaxy apparatus, and thereafter, HC1 gas is flowed to about ⁇ . ⁇ depth. Gas etching was performed. Then supply the source gas, 1100. C, and vapor phase growth was performed to form a 4 ⁇ thick epitaxy layer.
- MO601 manufactured by Mitsui Kinzoku Mining was used to measure the number of defects (COP) before ( ⁇ ) input to the vapor phase growth apparatus.
- Surfscan 6220 manufactured by KLA Tencor was used for the measurement of the number of defects (pits) after gas etching (B) and after formation of the epitaxial layer (C).
- the number of COPs before introduction into the vapor phase growth apparatus (A) was 26035
- the number of pits after gas etching (B) was 2621
- the number of pits after epitaxy layer formation (C ) Had 22 pits.
- Example 1 an epitaxy layer having a thickness of 4 ⁇ was formed under the same conditions as in Example 1. Also, as in Example 1, the results of measurement and observation under the same conditions Table 1 shows the number of defects before loading into the vapor phase growth system (A), after gas etching (B), and after deposition of the epitaxial layer (C).
- the number of COPs before input to the vapor phase growth system (A) is 25303
- the number of bits after gas etching (B) is 2754
- the number of bits after epitaxy layer formation (C) Had 34 pits.
- the specific resistance value was 4.2 mQ'cm as a silicon single crystal wafer.
- Example 1 an epitaxy layer having a thickness of 4 ⁇ was formed under the same conditions as in Example 1. Also, as in Example 1, as a result of measurement and observation under the same conditions, the defects before ( ⁇ ), after gas etching ( ⁇ ), and after epitaxy layer deposition (C) before being put into the vapor phase growth apparatus, were obtained. The numbers are shown in Table 1.
- Example 2 Using the obtained wafer, a 4 ⁇ thick epitaxy layer was formed under the same conditions as in Example 1. Also, as in Example 1, as a result of measurement and observation under the same conditions, the defects before ( ⁇ ), after gas etching ( ⁇ ), and after epitaxy layer deposition (C) before being put into the vapor phase growth apparatus, were obtained. The numbers are shown in Table 1. Explaining the number of defects shown in Table 1, the number of COPs before injection into the vapor phase growth system (A) is 2822, the number of bits after gas etching (B) is 2125, and the number of bits after epitaxy layer formation (C) Had 252 pits.
- pit defects in the epitaxial layer are reduced without cutting a silicon single crystal at a specific plane orientation and inclination angle, and without adding a special process or new work. It is possible to provide an epitaxy wafer with excellent manufacturability.
- a silicon single crystal wafer doped with arsenic (As) can be subjected to gas etching for improving cleanliness before the epitaxial film formation, and after the epitaxial film formation.
- the occurrence of pit defects can be suppressed, and a sound epitaxy layer can be obtained.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03791221A EP1533402B1 (en) | 2002-08-30 | 2003-08-15 | Epitaxial wafer and its manufacturing method |
US10/488,335 US7288791B2 (en) | 2002-08-30 | 2003-08-15 | Epitaxial wafer and method for manufacturing method |
AU2003262239A AU2003262239A1 (en) | 2002-08-30 | 2003-08-15 | Epitaxial wafer and its manufacturing method |
DE60336481T DE60336481D1 (de) | 2002-08-30 | 2003-08-15 | Epitaktischer wafer und herstellungsverfahren dafür |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-252463 | 2002-08-30 | ||
JP2002252463A JP4089354B2 (ja) | 2002-08-30 | 2002-08-30 | エピタキシャルウェーハとその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004020705A1 true WO2004020705A1 (ja) | 2004-03-11 |
Family
ID=31972748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/010390 WO2004020705A1 (ja) | 2002-08-30 | 2003-08-15 | エピタキシャルウエーハとその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7288791B2 (ja) |
EP (1) | EP1533402B1 (ja) |
JP (1) | JP4089354B2 (ja) |
AU (1) | AU2003262239A1 (ja) |
DE (1) | DE60336481D1 (ja) |
WO (1) | WO2004020705A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004339003A (ja) * | 2003-05-15 | 2004-12-02 | Shin Etsu Handotai Co Ltd | シリコンエピタキシャルウェーハ及びシリコンエピタキシャルウェーハの製造方法 |
US7438760B2 (en) * | 2005-02-04 | 2008-10-21 | Asm America, Inc. | Methods of making substitutionally carbon-doped crystalline Si-containing materials by chemical vapor deposition |
JP4508000B2 (ja) * | 2005-06-22 | 2010-07-21 | 株式会社Sumco | エピタキシャル膜の製造方法 |
WO2011030697A1 (en) * | 2009-09-11 | 2011-03-17 | Semiconductor Energy Laboratory Co., Ltd. | Power storage device and method for manufacturing the same |
US8367528B2 (en) | 2009-11-17 | 2013-02-05 | Asm America, Inc. | Cyclical epitaxial deposition and etch |
JP5544986B2 (ja) * | 2010-04-01 | 2014-07-09 | 信越半導体株式会社 | 貼り合わせsoiウェーハの製造方法、及び貼り合わせsoiウェーハ |
JP5917027B2 (ja) | 2010-06-30 | 2016-05-11 | 株式会社半導体エネルギー研究所 | 電極用材料の作製方法 |
US9343379B2 (en) | 2011-10-14 | 2016-05-17 | Sunedison Semiconductor Limited | Method to delineate crystal related defects |
JP6477210B2 (ja) | 2015-04-30 | 2019-03-06 | 株式会社Sumco | エピタキシャルシリコンウェーハの製造方法 |
JP6474048B2 (ja) * | 2015-12-25 | 2019-02-27 | 信越半導体株式会社 | エピタキシャルウェーハの製造方法 |
JP6702422B2 (ja) | 2016-08-10 | 2020-06-03 | 株式会社Sumco | エピタキシャルシリコンウェーハの製造方法 |
DE112018001919B4 (de) * | 2017-04-06 | 2022-09-22 | Sumco Corporation | Verfahren zum herstellen eines siliziumepitaxialwafers und siliziumepitaxialwafer |
DE102017215332A1 (de) * | 2017-09-01 | 2019-03-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Einkristall aus Silizium mit <100>-Orientierung, der mit Dotierstoff vom n-Typ dotiert ist, und Verfahren zur Herstellung eines solchen Einkristalls |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62226891A (ja) * | 1986-03-28 | 1987-10-05 | Shin Etsu Handotai Co Ltd | 半導体装置用基板 |
JPH08236458A (ja) * | 1995-02-24 | 1996-09-13 | Sumitomo Sitix Corp | 半導体基板の製造方法 |
JP2000100737A (ja) * | 1998-06-16 | 2000-04-07 | Komatsu Electronic Metals Co Ltd | エピタキシャルウェハの製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63226918A (ja) * | 1987-03-16 | 1988-09-21 | Shin Etsu Handotai Co Ltd | 燐化砒化ガリウム混晶エピタキシヤルウエ−ハ |
JP3081706B2 (ja) * | 1992-06-12 | 2000-08-28 | 株式会社東芝 | 半導体装置用基板 |
US5904768A (en) * | 1996-10-15 | 1999-05-18 | Memc Electronic Materials, Inc. | Process for controlling the oxygen content in silicon wafers heavily doped with antimony or arsenic |
US6444027B1 (en) * | 2000-05-08 | 2002-09-03 | Memc Electronic Materials, Inc. | Modified susceptor for use in chemical vapor deposition process |
DE10025871A1 (de) * | 2000-05-25 | 2001-12-06 | Wacker Siltronic Halbleitermat | Epitaxierte Halbleiterscheibe und Verfahren zu ihrer Herstellung |
US6743495B2 (en) * | 2001-03-30 | 2004-06-01 | Memc Electronic Materials, Inc. | Thermal annealing process for producing silicon wafers with improved surface characteristics |
-
2002
- 2002-08-30 JP JP2002252463A patent/JP4089354B2/ja not_active Expired - Lifetime
-
2003
- 2003-08-15 WO PCT/JP2003/010390 patent/WO2004020705A1/ja active Application Filing
- 2003-08-15 AU AU2003262239A patent/AU2003262239A1/en not_active Abandoned
- 2003-08-15 DE DE60336481T patent/DE60336481D1/de not_active Expired - Lifetime
- 2003-08-15 EP EP03791221A patent/EP1533402B1/en not_active Expired - Lifetime
- 2003-08-15 US US10/488,335 patent/US7288791B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62226891A (ja) * | 1986-03-28 | 1987-10-05 | Shin Etsu Handotai Co Ltd | 半導体装置用基板 |
JPH08236458A (ja) * | 1995-02-24 | 1996-09-13 | Sumitomo Sitix Corp | 半導体基板の製造方法 |
JP2000100737A (ja) * | 1998-06-16 | 2000-04-07 | Komatsu Electronic Metals Co Ltd | エピタキシャルウェハの製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1533402A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE60336481D1 (de) | 2011-05-05 |
JP2004091234A (ja) | 2004-03-25 |
EP1533402A1 (en) | 2005-05-25 |
US20050035349A1 (en) | 2005-02-17 |
US7288791B2 (en) | 2007-10-30 |
EP1533402A4 (en) | 2007-07-11 |
JP4089354B2 (ja) | 2008-05-28 |
AU2003262239A1 (en) | 2004-03-19 |
EP1533402B1 (en) | 2011-03-23 |
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