JP2017199781A - ウエーハの加工方法 - Google Patents
ウエーハの加工方法 Download PDFInfo
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- JP2017199781A JP2017199781A JP2016089088A JP2016089088A JP2017199781A JP 2017199781 A JP2017199781 A JP 2017199781A JP 2016089088 A JP2016089088 A JP 2016089088A JP 2016089088 A JP2016089088 A JP 2016089088A JP 2017199781 A JP2017199781 A JP 2017199781A
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- wafer
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- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims description 32
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 235000012431 wafers Nutrition 0.000 claims 21
- 238000012545 processing Methods 0.000 abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 64
- 229910052710 silicon Inorganic materials 0.000 description 64
- 239000010703 silicon Substances 0.000 description 64
- 238000012546 transfer Methods 0.000 description 13
- 238000005336 cracking Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/361—Removing material for deburring or mechanical trimming
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- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67092—Apparatus for mechanical treatment
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67132—Apparatus for placing on an insulating substrate, e.g. tape
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L21/6836—Wafer tapes, e.g. grinding or dicing support tapes
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6838—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping with gripping and holding devices using a vacuum; Bernoulli devices
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68327—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used during dicing or grinding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/6834—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used to protect an active side of a device or wafer
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Laser Beam Processing (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Dicing (AREA)
- High Energy & Nuclear Physics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
Abstract
Description
裏面側を研削する研削工程が完了したウエーハをチャックテーブルから搬出して次工程の改質層を形成する位置に搬送する搬送手段は、研削装置のチャックテーブルに保持されたウエーハを吸引パッドによって吸引する。該ウエーハを吸引した際、該吸引パッドの吸引力がウエーハ内部に不均一な内部応力を発生させ、この内部応力が十分に解放されないまま、次工程の改質層形成工程において使用されるチャックテーブルに該ウエーハを載置して吸引保持させると、該吸引パッドによって生じさせられた内部応力が部分的にウエーハ内部に残留することになる。そして、次の該ウエーハ内部に改質層を形成する工程において、ウエーハに対してレーザー光線が照射されることをきっかけにして、前記した残留内部応力が意図しない位置に割れ現象を生じさせるのである。
ウエーハを吸引保持する保持面を有した第1のチャックテーブルにウエーハの保護テープ側を保持する保持工程と、該第1のチャックテーブルに吸引保持されたウエーハの裏面を研削して薄化する研削工程と、ウエーハを吸引保持する吸引パッドを備えた搬送手段によって該第1のチャックテーブルに保持したウエーハの裏面を吸引保持し該第1のチャックテーブルから搬出する搬出工程と、該搬送手段により、ウエーハを吸引保持する保持面を有した第2のチャックテーブルにウエーハを搬送しウエーハの保護テープ側を該保持面に保持して該搬送手段の吸引パッドをウエーハの裏面から離反させる搬送工程と、ウエーハの裏面からウエーハに対して透過性を有する波長のレーザー光線の集光点を分割予定ラインに対応するウエーハ内部に位置付けて照射して分割予定ラインに沿って改質層を形成する改質層形成工程と、を少なくとも含み、該搬送工程は、該搬送手段の吸引パッドに保持されたウエーハを該第2のチャックテーブルの保持面に載置する載置ステップと、該吸引パッドの吸引力を遮断し該吸引パッドと該保持面とでウエーハを挟持する挟持ステップと、該挟持ステップを実行した後、該保持面に吸引力を作用させ該保持面にウエーハの保護テープ側を吸引保持して該吸引パッドをウエーハの裏面から離反させる保持ステップと、を含むように構成されていることにより、ウエーハを吸引パッドから第2のチャックテーブルに移し替える際に、吸引パッドの吸引力を遮断してウエーハの内部応力が解放され、該吸引パッドによって生成されたウエーハへの内部応力が残存することなく第2のチャックテーブルに移し替えられて吸引保持され、ウエーハの裏面からレーザー光線を照射しても、部分的にデバイスが破損するという問題が解消する。
波長 :1342nm
平均出力 :0.18W
繰り返し周波数 :80kHz
スポット径 :φ1μm
加工送り速度 :180mm/秒
集光点位置 :表面10aから32μm(裏面10bから28μm)
シリコンウエーハ10が載置されるレーザー加工装置6の第2のチャックテーブル60にシリコンウエーハ10を搬送する搬送工程では、吸引パッド54に保持されたシリコンウエーハ10を第2のチャックテーブル60の保持面62に当接させた後、第2のチャックテーブルに吸引力を作用させる前に、吸引パッド54に作用する吸引力を遮断し、シリコンウエーハ10を、吸引パッド54、及び、第2のチャックテーブル60のいずれからも吸引されず、且つ吸引パッド54と、第2のチャックテーブル60とで物理的に挟持された状態とする。これにより、吸引パッド54に吸引保持されることでシリコンウエーハ10の内部に発生していた内部応力が一旦完全に解放される。そして、シリコンウエーハ10は、吸引パッド54と第2のチャックテーブル60とで物理的に挟持されているため、位置ずれ等を起こすこともなく、第2のチャックテーブル60により吸引保持される。したがって、改質層形成工程において、割れ現象が発生せず、シリコンウエーハ10上に形成されたデバイス12が部分的に破壊されることが防止されて、生産効率を悪化させることがない。
6:レーザー加工装置
10:シリコンウエーハ
10a:表面
10b:裏面
10c:改質層
12:デバイス
14:分割予定ライン
20:保護テープ
30:第1のチャックテーブル
50:搬送手段
52:搬送アーム
54:吸引パッド
60:第2のチャックテーブル
70:レーザー光線照射手段
72:集光器
Claims (1)
- 複数のデバイスが分割予定ラインによって区画され表面に形成されたウエーハを個々のデバイスに分割するウエーハの加工方法であって、
ウエーハの表面に保護テープを貼着する保護テープ貼着工程と、
ウエーハを吸引保持する保持面を有した第1のチャックテーブルにウエーハの保護テープ側を保持する保持工程と、
該第1のチャックテーブルに吸引保持されたウエーハの裏面を研削して薄化する研削工程と、
ウエーハを吸引保持する吸引パッドを備えた搬送手段によって該第1のチャックテーブルに保持したウエーハの裏面を吸引保持し該第1のチャックテーブルから搬出する搬出工程と、
該搬送手段により、ウエーハを吸引保持する保持面を有した第2のチャックテーブルにウエーハを搬送しウエーハの保護テープ側を該保持面に保持して該搬送手段の吸引パッドをウエーハの裏面から離反させる搬送工程と、
ウエーハの裏面からウエーハに対して透過性を有する波長のレーザー光線の集光点を分割予定ラインに対応するウエーハ内部に位置付けて照射して分割予定ラインに沿って改質層を形成する改質層形成工程と、を少なくとも含み、
該搬送工程は、
該搬送手段の吸引パッドに保持されたウエーハを該第2のチャックテーブルの保持面に載置する載置ステップと、
該吸引パッドの吸引力を遮断し該吸引パッドと該保持面とでウエーハを挟持する挟持ステップと、
該挟持ステップを実行した後、該保持面に吸引力を作用させ該保持面にウエーハの保護テープ側を吸引保持して該吸引パッドをウエーハの裏面から離反させる保持ステップと、
を含むウエーハの加工方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016089088A JP6633447B2 (ja) | 2016-04-27 | 2016-04-27 | ウエーハの加工方法 |
TW106108001A TWI718269B (zh) | 2016-04-27 | 2017-03-10 | 晶圓之加工方法 |
SG10201702971PA SG10201702971PA (en) | 2016-04-27 | 2017-04-11 | Wafer processing method |
CN201710255914.6A CN107309555B (zh) | 2016-04-27 | 2017-04-18 | 晶片的加工方法 |
KR1020170052095A KR102242829B1 (ko) | 2016-04-27 | 2017-04-24 | 웨이퍼의 가공 방법 |
US15/494,867 US9824926B1 (en) | 2016-04-27 | 2017-04-24 | Wafer processing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016089088A JP6633447B2 (ja) | 2016-04-27 | 2016-04-27 | ウエーハの加工方法 |
Publications (2)
Publication Number | Publication Date |
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JP2017199781A true JP2017199781A (ja) | 2017-11-02 |
JP6633447B2 JP6633447B2 (ja) | 2020-01-22 |
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ID=60157120
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Application Number | Title | Priority Date | Filing Date |
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JP2016089088A Active JP6633447B2 (ja) | 2016-04-27 | 2016-04-27 | ウエーハの加工方法 |
Country Status (6)
Country | Link |
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US (1) | US9824926B1 (ja) |
JP (1) | JP6633447B2 (ja) |
KR (1) | KR102242829B1 (ja) |
CN (1) | CN107309555B (ja) |
SG (1) | SG10201702971PA (ja) |
TW (1) | TWI718269B (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7265430B2 (ja) * | 2019-07-02 | 2023-04-26 | 株式会社ディスコ | 処理装置 |
Citations (4)
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JPH08339983A (ja) * | 1995-06-13 | 1996-12-24 | Sony Corp | 半導体ウエハ研削装置 |
JP2014013807A (ja) * | 2012-07-04 | 2014-01-23 | Disco Abrasive Syst Ltd | ウエーハの加工方法 |
JP2015046420A (ja) * | 2013-08-27 | 2015-03-12 | 株式会社ディスコ | ウエーハの管理方法 |
JP2015076434A (ja) * | 2013-10-07 | 2015-04-20 | 株式会社ディスコ | ウエーハの加工方法 |
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JP4659300B2 (ja) * | 2000-09-13 | 2011-03-30 | 浜松ホトニクス株式会社 | レーザ加工方法及び半導体チップの製造方法 |
JP3408805B2 (ja) | 2000-09-13 | 2003-05-19 | 浜松ホトニクス株式会社 | 切断起点領域形成方法及び加工対象物切断方法 |
KR100468748B1 (ko) * | 2002-07-12 | 2005-01-29 | 삼성전자주식회사 | 프리컷 다이싱 테이프와 범용 다이싱 테이프를 웨이퍼에 마운팅할 수 있는 다이싱 테이프 부착 장비 및 이를포함하는 인라인 시스템 |
DE102005004827B4 (de) * | 2004-02-03 | 2011-03-31 | Disco Corp. | Wafer-Unterteilungsverfahren |
JP4769429B2 (ja) * | 2004-05-26 | 2011-09-07 | ルネサスエレクトロニクス株式会社 | 半導体装置の製造方法 |
JP2006286727A (ja) * | 2005-03-31 | 2006-10-19 | Denso Corp | 複数の半導体装置を備えた半導体ウェハおよびそのダイシング方法 |
WO2007055010A1 (ja) * | 2005-11-10 | 2007-05-18 | Renesas Technology Corp. | 半導体装置の製造方法および半導体装置 |
JP2008283025A (ja) * | 2007-05-11 | 2008-11-20 | Disco Abrasive Syst Ltd | ウエーハの分割方法 |
JP4959422B2 (ja) * | 2007-05-30 | 2012-06-20 | 株式会社ディスコ | ウエーハの分割方法 |
JP5307384B2 (ja) * | 2007-12-03 | 2013-10-02 | 株式会社ディスコ | ウエーハの分割方法 |
JP5307612B2 (ja) * | 2009-04-20 | 2013-10-02 | 株式会社ディスコ | 光デバイスウエーハの加工方法 |
JP5930645B2 (ja) * | 2011-09-30 | 2016-06-08 | 株式会社ディスコ | ウエーハの加工方法 |
EP2827362A4 (en) * | 2012-03-12 | 2015-11-04 | Mitsubishi Electric Corp | VACUUM SUCTION LEVER, METHOD FOR CUTTING SEMICONDUCTOR WAFERS, AND METHOD FOR GLOWING SEMICONDUCTOR WAFERS |
JP5961047B2 (ja) * | 2012-06-22 | 2016-08-02 | 株式会社ディスコ | ウエーハの加工方法 |
JP2014011381A (ja) * | 2012-07-02 | 2014-01-20 | Disco Abrasive Syst Ltd | ウエーハの加工方法 |
JP6242668B2 (ja) * | 2013-11-25 | 2017-12-06 | 株式会社ディスコ | ウエーハの加工方法 |
CN103606635B (zh) * | 2013-11-26 | 2016-05-04 | 上海和辉光电有限公司 | 电激发光组件的封装方法 |
JP6608713B2 (ja) * | 2016-01-19 | 2019-11-20 | 株式会社ディスコ | ウエーハの加工方法 |
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2016
- 2016-04-27 JP JP2016089088A patent/JP6633447B2/ja active Active
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2017
- 2017-03-10 TW TW106108001A patent/TWI718269B/zh active
- 2017-04-11 SG SG10201702971PA patent/SG10201702971PA/en unknown
- 2017-04-18 CN CN201710255914.6A patent/CN107309555B/zh active Active
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JPH08339983A (ja) * | 1995-06-13 | 1996-12-24 | Sony Corp | 半導体ウエハ研削装置 |
JP2014013807A (ja) * | 2012-07-04 | 2014-01-23 | Disco Abrasive Syst Ltd | ウエーハの加工方法 |
JP2015046420A (ja) * | 2013-08-27 | 2015-03-12 | 株式会社ディスコ | ウエーハの管理方法 |
JP2015076434A (ja) * | 2013-10-07 | 2015-04-20 | 株式会社ディスコ | ウエーハの加工方法 |
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TW201802901A (zh) | 2018-01-16 |
CN107309555A (zh) | 2017-11-03 |
KR20170122666A (ko) | 2017-11-06 |
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US9824926B1 (en) | 2017-11-21 |
KR102242829B1 (ko) | 2021-04-20 |
SG10201702971PA (en) | 2017-11-29 |
US20170316977A1 (en) | 2017-11-02 |
TWI718269B (zh) | 2021-02-11 |
CN107309555B (zh) | 2020-10-09 |
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