JP6459132B2 - ＳｉＣエピタキシャルウェハ及びその製造方法、並びに、欠陥識別方法 - Google Patents

ＳｉＣエピタキシャルウェハ及びその製造方法、並びに、欠陥識別方法 Download PDF

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JP6459132B2
JP6459132B2 JP2016186062A JP2016186062A JP6459132B2 JP 6459132 B2 JP6459132 B2 JP 6459132B2 JP 2016186062 A JP2016186062 A JP 2016186062A JP 2016186062 A JP2016186062 A JP 2016186062A JP 6459132 B2 JP6459132 B2 JP 6459132B2
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sic
substrate
sic epitaxial
defects
epitaxial layer
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JP2018041942A (ja
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玲 郭
玲 郭
宏二 亀井
宏二 亀井
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Showa Denko KK
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Showa Denko KK
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Priority to CN201780051959.XA priority Critical patent/CN109642342B/zh
Priority to TW106128221A priority patent/TWI630292B/zh
Priority to US16/325,281 priority patent/US11293115B2/en
Priority to DE112017004297.6T priority patent/DE112017004297B4/de
Priority to PCT/JP2017/029740 priority patent/WO2018043171A1/ja
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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
    • C23C16/32—Carbides
    • C23C16/325—Silicon carbide
    • 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
    • C30B25/16—Controlling or regulating
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/9501—Semiconductor wafers
    • G01N21/9505—Wafer internal defects, e.g. microcracks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • 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
    • H01L21/02378—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
    • H01L21/02367—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
    • H01L21/02436—Intermediate layers between substrates and deposited layers
    • H01L21/02439—Materials
    • H01L21/02441—Group 14 semiconducting materials
    • H01L21/02447—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
    • H01L21/02521—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
    • H01L21/02612—Formation types
    • H01L21/02617—Deposition types
    • H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
    • 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
    • H01L21/02634—Homoepitaxy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
    • H01L22/10—Measuring as part of the manufacturing process
    • H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
    • H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
    • H01L29/1608—Silicon carbide
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/30—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by physical imperfections; having polished or roughened surface
    • H01L29/32—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by physical imperfections; having polished or roughened surface the imperfections being within the semiconductor body
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10056—Microscopic image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30148—Semiconductor; IC; Wafer

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Pathology (AREA)
  • Theoretical Computer Science (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Quality & Reliability (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Mechanical Engineering (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Recrystallisation Techniques (AREA)
  • Chemical Vapour Deposition (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
JP2016186062A 2016-08-31 2016-09-23 ＳｉＣエピタキシャルウェハ及びその製造方法、並びに、欠陥識別方法 Active JP6459132B2 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201780051959.XA CN109642342B (zh) 2016-08-31 2017-08-21 SiC外延晶片及其制造方法、以及缺陷识别方法
TW106128221A TWI630292B (zh) 2016-08-31 2017-08-21 ＳｉＣ磊晶晶圓及其製造方法、以及缺陷識別方法
US16/325,281 US11293115B2 (en) 2016-08-31 2017-08-21 Method for producing a SiC epitaxial wafer containing a total density of large pit defects and triangular defects of 0.01 defects/cm2 or more and 0.6 defects/cm2 or less
DE112017004297.6T DE112017004297B4 (de) 2016-08-31 2017-08-21 Herstellungsverfahren für einen SiC-Epitaxiewafer
PCT/JP2017/029740 WO2018043171A1 (ja) 2016-08-31 2017-08-21 ＳｉＣエピタキシャルウェハ及びその製造方法、並びに、欠陥識別方法
US17/683,176 US11961736B2 (en) 2016-08-31 2022-02-28 SiC epitaxial wafer, production method therefor, and defect identification method

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JP2016170194 2016-08-31
JP2016170194 2016-08-31

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JP2018041942A JP2018041942A (ja) 2018-03-15
JP6459132B2 true JP6459132B2 (ja) 2019-01-30

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CN (1) CN109642342B (de)
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TW (1) TWI630292B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6493690B2 (ja) * 2016-08-31 2019-04-03 昭和電工株式会社 ＳｉＣエピタキシャルウェハ及びその製造方法、並びに、ラージピット欠陥検出方法、欠陥識別方法
US11293115B2 (en) 2016-08-31 2022-04-05 Showa Denko K.K. Method for producing a SiC epitaxial wafer containing a total density of large pit defects and triangular defects of 0.01 defects/cm2 or more and 0.6 defects/cm2 or less
US11320388B2 (en) 2016-08-31 2022-05-03 Showa Denko K.K. SiC epitaxial wafer containing large pit defects with a surface density of 0.5 defects/CM2 or less, and production method therefor
JP7204436B2 (ja) * 2018-11-16 2023-01-16 昭和電工株式会社 欠陥除去方法及びＳｉＣエピタキシャルウェハの製造方法
JP7063259B2 (ja) * 2018-12-27 2022-05-09 株式会社Sumco シリコンエピタキシャルウェーハの製造方法
JP7148427B2 (ja) * 2019-02-06 2022-10-05 昭和電工株式会社 ＳｉＣエピタキシャルウェハ及びその製造方法
JP7179219B1 (ja) 2019-02-06 2022-11-28 昭和電工株式会社 ＳｉＣデバイス及びその製造方法
JP7363110B2 (ja) * 2019-06-10 2023-10-18 株式会社レゾナック ＳｉＣエピタキシャルウェハ、ＳｉＣ基板及びＳｉＣエピタキシャルウェハの評価方法、及びＳｉＣデバイスの製造方法
JP7363423B2 (ja) * 2019-12-02 2023-10-18 株式会社デンソー 炭化珪素単結晶の製造方法
CN113295616A (zh) * 2021-03-30 2021-08-24 浙江大学杭州国际科创中心 一种SiC晶圆及其外延层结构的综合测试方法
WO2023282001A1 (ja) * 2021-07-08 2023-01-12 住友電気工業株式会社 炭化珪素エピタキシャル基板、炭化珪素エピタキシャル基板の製造方法および炭化珪素半導体装置の製造方法
CN114717639B (zh) * 2022-06-07 2022-09-16 浙江大学杭州国际科创中心 基于光电化学腐蚀工艺定位氧化镓晶片表面缺陷的方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2264223A3 (de) * 2006-09-14 2011-10-26 Cree, Inc. Mikroröhrchen-freies Siliciumcarbid und Verfahren zu seiner Herstellung
JP4887418B2 (ja) * 2009-12-14 2012-02-29 昭和電工株式会社 ＳｉＣエピタキシャルウェハの製造方法
JP5897834B2 (ja) * 2011-07-19 2016-03-30 昭和電工株式会社 ＳｉＣエピタキシャルウェハの製造方法
JP6226959B2 (ja) * 2012-04-20 2017-11-08 トゥー‐シックス・インコーポレイテッド 大口径高品質ＳｉＣ単結晶、方法、及び装置
JP6037671B2 (ja) * 2012-06-19 2016-12-07 昭和電工株式会社 ＳｉＣエピタキシャルウェハ及びその製造方法
JP2014024703A (ja) * 2012-07-26 2014-02-06 Sumitomo Electric Ind Ltd 炭化珪素単結晶の製造方法
JP6078330B2 (ja) * 2012-12-21 2017-02-08 昭和電工株式会社 炭化珪素単結晶製造用坩堝、炭化珪素単結晶製造装置及び炭化珪素単結晶の製造方法
KR101989255B1 (ko) * 2013-06-04 2019-06-13 쇼와 덴코 가부시키가이샤 에피택셜 탄화규소 웨이퍼용 탄화규소 단결정 기판의 제조 방법
JP6347188B2 (ja) 2014-09-08 2018-06-27 富士電機株式会社 炭化珪素半導体装置の製造方法および炭化珪素半導体装置
JP2016170194A (ja) 2015-03-11 2016-09-23 セイコーエプソン株式会社 吸音体、吸音構造
JP5861794B1 (ja) 2015-03-27 2016-02-16 東洋インキＳｃホールディングス株式会社 再剥離型粘着剤
JP6493690B2 (ja) * 2016-08-31 2019-04-03 昭和電工株式会社 ＳｉＣエピタキシャルウェハ及びその製造方法、並びに、ラージピット欠陥検出方法、欠陥識別方法

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Publication number Publication date
TWI630292B (zh) 2018-07-21
CN109642342A (zh) 2019-04-16
JP2018041942A (ja) 2018-03-15
DE112017004297B4 (de) 2024-04-25
TW201812124A (zh) 2018-04-01
CN109642342B (zh) 2021-10-26
DE112017004297T5 (de) 2019-05-23

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