JP2005203541A - ウエーハのレーザー加工方法 - Google Patents
ウエーハのレーザー加工方法 Download PDFInfo
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- JP2005203541A JP2005203541A JP2004007850A JP2004007850A JP2005203541A JP 2005203541 A JP2005203541 A JP 2005203541A JP 2004007850 A JP2004007850 A JP 2004007850A JP 2004007850 A JP2004007850 A JP 2004007850A JP 2005203541 A JP2005203541 A JP 2005203541A
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- 238000003672 processing method Methods 0.000 title claims description 17
- 230000001678 irradiating effect Effects 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 47
- 238000000034 method Methods 0.000 abstract description 18
- 230000035699 permeability Effects 0.000 abstract description 9
- 230000000717 retained effect Effects 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 109
- 230000003287 optical effect Effects 0.000 description 60
- 239000000758 substrate Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 13
- 238000005520 cutting process Methods 0.000 description 12
- 229910052594 sapphire Inorganic materials 0.000 description 9
- 239000010980 sapphire Substances 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 8
- WSMQKESQZFQMFW-UHFFFAOYSA-N 5-methyl-pyrazole-3-carboxylic acid Chemical compound CC1=CC(C(O)=O)=NN1 WSMQKESQZFQMFW-UHFFFAOYSA-N 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 229910002601 GaN Inorganic materials 0.000 description 2
- 229910009372 YVO4 Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- -1 gallium nitride compound Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- 239000010453 quartz Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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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
- H01L21/683—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
-
- 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
- B23K26/50—Working by transmitting the laser beam through or within the workpiece
- B23K26/53—Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
-
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/40—Semiconductor 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
- H01L2221/6834—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
Abstract
【解決手段】 ウエーハに形成された分割予定ラインに沿ってウエーハに対して透過性を有するパルスレーザー光線を照射し、ウエーハの内部に溶融再固化した変質領域を形成するレーザー加工方法であって、ウエーハの一方の面に通気性を有する保護テープを貼着する保護テープ貼着工程と、保護テープが貼着されたウエーハを保護テープが貼着された側をレーザー加工装置のチャックテーブルに保持するウエーハ保持工程と、チャックテーブルに保持されたウエーハの他方の面側からウエーハに対して透過性を有するパルスレーザー光線をウエーハの一方の面の近傍に集光点を合わせて照射し、ウエーハの内部に分割予定ラインに沿って一方の面に露出する変質層を形成するレーザー光線照射工程とを含む。
【選択図】 図7
Description
該ウエーハの一方の面に通気性を有する保護テープを貼着する保護テープ貼着工程と、
該保護テープが貼着された該ウエーハを該保護テープが貼着された側をレーザー加工装置のチャックテーブルに保持するウエーハ保持工程と、
該チャックテーブルに保持された該ウエーハの他方の面側から該ウエーハに対して透過性を有するパルスレーザー光線を該ウエーハの一方の面の近傍に集光点を合わせて照射し、該ウエーハの内部に該分割予定ラインに沿って一方の面に露出する変質層を形成するレーザー光線照射工程と、を含む、
ことを特徴とするウエーハのレーザー加工方法が提供される。
上述したようにウエーハ保持工程において光デバイスウエーハ2を吸引保持したチャックテーブル51は、図示しない移動機構によって撮像手段53の直下に位置付けられる。チャックテーブル51が撮像手段53の直下に位置付けられると、撮像手段53および図示しない制御手段によって光デバイスウエーハ2のレーザー加工すべき加工領域を検出するアライメント作業を実行する。即ち、撮像手段53および図示しない制御手段は、光デバイス2の所定方向に形成されている分割予定ライン21と、分割予定ライン21に沿ってレーザー光線を照射するレーザー光線照射手段52の集光器524との位置合わせを行うためのパターンマッチング等の画像処理を実行し、レーザー光線照射位置のアライメントを遂行する。また、光デバイスウエーハ2に形成されている上記所定方向に対して直角に延びる分割予定ライン21に対しても、同様にレーザー光線照射位置のアライメントが遂行される。このとき、光デバイスウエーハ2の分割予定ライン21が形成されている表面20aは下側に位置しているが、撮像手段53が上述したように赤外線照明手段と赤外線を捕らえる光学系および赤外線に対応した電気信号を出力する撮像素子(赤外線CCD)等で構成された撮像手段を備えているので、裏面20bから透かして分割予定ライン21を撮像することができる。
光源 :YVO4レーザー
波長 :1064nmのパルスレーザー
ピークパワー密度:5.0×10E8W/cm2 〜2.0×10E12W/cm2
集光スポット径 :φ1μm
繰り返し周波数 :40〜400kHz
加工送り速度 :40〜400mm/秒
20:サファイヤ基板
21:分割予定ライン
22:光デバイス
210:変質層
3:環状のフレーム
4、40:保護テープ
5:レーザー加工装置
51:レーザー加工装置のチャックテーブル
52:レーザー光線照射手段
53:撮像手段
Claims (3)
- ウエーハに形成された分割予定ラインに沿って該ウエーハに対して透過性を有するパルスレーザー光線を照射し、該ウエーハの内部に溶融再固化した変質領域を形成するレーザー加工方法であって、
該ウエーハの一方の面に通気性を有する保護テープを貼着する保護テープ貼着工程と、
該保護テープが貼着された該ウエーハを該保護テープが貼着された側をレーザー加工装置のチャックテーブルに保持するウエーハ保持工程と、
該チャックテーブルに保持された該ウエーハの他方の面側から該ウエーハに対して透過性を有するパルスレーザー光線を該ウエーハの一方の面の近傍に集光点を合わせて照射し、該ウエーハの内部に該分割予定ラインに沿って一方の面に露出する変質層を形成するレーザー光線照射工程と、を含む、
ことを特徴とするウエーハのレーザー加工方法。 - 該通気性を有する保護テープは、メッシュ状テープからなっている、請求項1記載のウエーハのレーザー加工方法。
- 該通気性を有する保護テープは、多孔質テープからなっている、請求項1記載のウエーハのレーザー加工方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004007850A JP2005203541A (ja) | 2004-01-15 | 2004-01-15 | ウエーハのレーザー加工方法 |
US11/028,737 US7435607B2 (en) | 2004-01-15 | 2005-01-05 | Method of wafer laser processing using a gas permeable protective tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2004007850A JP2005203541A (ja) | 2004-01-15 | 2004-01-15 | ウエーハのレーザー加工方法 |
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JP2005203541A true JP2005203541A (ja) | 2005-07-28 |
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JP2004007850A Pending JP2005203541A (ja) | 2004-01-15 | 2004-01-15 | ウエーハのレーザー加工方法 |
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US (1) | US7435607B2 (ja) |
JP (1) | JP2005203541A (ja) |
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JP2007242787A (ja) * | 2006-03-07 | 2007-09-20 | Disco Abrasive Syst Ltd | ウエーハの分割方法 |
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