JP6189208B2 - 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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- JP6189208B2 JP6189208B2 JP2013268612A JP2013268612A JP6189208B2 JP 6189208 B2 JP6189208 B2 JP 6189208B2 JP 2013268612 A JP2013268612 A JP 2013268612A JP 2013268612 A JP2013268612 A JP 2013268612A JP 6189208 B2 JP6189208 B2 JP 6189208B2
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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
- H01L21/70—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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
-
- 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
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0005—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing
- B28D5/0011—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing with preliminary treatment, e.g. weakening by scoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0005—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by breaking, e.g. dicing
- B28D5/0052—Means for supporting or holding work during breaking
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
- H01L21/3043—Making grooves, e.g. cutting
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
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- 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
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- 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
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- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
- B23K2103/56—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26 semiconducting
-
- 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
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- 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
- H01L2221/68336—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 involving stretching of the auxiliary support post dicing
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Dicing (AREA)
- Laser Beam Processing (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
(1)レーザー加工溝の幅が十分であってもレーザー加工溝の側面に付着した溶融物に切削ブレードが接触して突発的にデバイスの外周に欠けが生ずる。
(2)レーザー加工溝を形成する際に機能層の除去が不十分であると切削ブレードのズレや倒れが発生してデバイスの機能層に剥離が生じる。
(3)切削ブレードの幅を超える範囲でレーザー加工溝を形成するために、分割予定ラインの幅を広くする必要があり、ウエーハに形成されるデバイスの数が減少する。
ウエーハを構成する機能層に形成された分割予定ラインに沿ってレーザー光線を照射することにより機能層をアブレーション加工し、機能層を分割予定ラインに沿って切断するレーザー加工溝を形成する機能層切断工程と、
該機能層切断工程が実施されたウエーハを構成する機能層の表面に保護部材を貼着する保護部材貼着工程と、
該保護部材貼着工程が実施されたウエーハの該保護部材側をチャックテーブルに保持し、ウエーハを構成する基板の裏面側から分割予定ラインと対応する領域に切削ブレードを位置付けて機能層に至らない切削溝を形成する切削溝形成工程と、
該切削溝形成工程が実施されたウエーハを構成する基板の裏面にダイシングテープを貼着しダイシングテープの外周部を環状のフレームによって支持するとともに、該保護部材を剥離するウエーハ支持工程と、
該ウエーハ支持工程が実施されたウエーハを構成する基板の裏面が貼着されたダイシングテープを拡張してデバイス間を広げるテープ拡張工程と、を含む、
ことを特徴とするウエーハの加工方法が提供される。
また、上記切削溝形成工程においては機能層を切断したレーザー加工溝の底に達する切削溝を形成することにより、ウエーハを個々のデバイスに分割する。
(1)レーザー加工工程によるアブレーション加工によって機能層に形成されるレーザー加工溝の側面に溶融物が付着しても、レーザー加工溝を切削ブレードで切削しないので、切削ブレードの接触によって突発的にデバイスの外周に欠けが生じるという問題が解消する。
(2)レーザー加工工程によるアブレーション加工における機能層の除去が不十分であっても、基板の裏面側から形成された切削溝にレーザー加工溝が達すればウエーハを個々のデバイスに分割することができ、レーザー加工溝を切削ブレードで切削しないので、機能層に剥離が生じるという問題が解消する。
(3)切削ブレードの幅を超える幅のレーザー加工溝を形成する必要がないので、分割予定ラインの幅を狭くすることができ、ウエーハに形成することができるデバイスの数を増大することができる。
先ず、半導体ウエーハ2を構成する機能層21に形成された分割予定ライン22に沿ってレーザー光線を照射することにより機能層21をアブレーション加工し、機能層21を分割予定ライ22に沿って切断するレーザー加工溝を形成する機能層切断工程を実施する。この機能層切断工程は、図2に示すレーザー加工装置3を用いて実施する。図2に示すレーザー加工装置3は、被加工物を保持するチャックテーブル31と、該チャックテーブル31上に保持された被加工物にレーザー光線を照射するレーザー光線照射手段32と、チャックテーブル31上に保持された被加工物を撮像する撮像手段33を具備している。チャックテーブル31は、被加工物を吸引保持するように構成されており、図示しない加工送り手段によって図2において矢印Xで示す加工送り方向に移動せしめられるとともに、図示しない割り出し送り手段によって図2において矢印Yで示す割り出し送り方向に移動せしめられるようになっている。
先ず、上述した図2に示すレーザー加工装置3のチャックテーブル31上に半導体ウエーハ2を構成する基板20の裏面20b側を載置する。そして、図示しない吸引手段を作動することにより、半導体ウエーハ2をチャックテーブル31上に保持する(ウエーハ保持工程)。従って、チャックテーブル31に保持された半導体ウエーハ2は、機能層21の表面21aが上側となる。このようにして、半導体ウエーハ2を吸引保持したチャックテーブル31は、図示しない加工送り手段によって撮像手段33の直下に位置付けられる。
レーザー光線の波長 :355nm
繰り返し周波数 :200kHz
出力 :2W
集光スポット径 :φ6μm
加工送り速度 :500mm/秒
図4に示す実施形態は、上記機能層切断工程を実施することによって形成されたレーザー加工溝210が、半導体ウエーハ2を構成する機能層21を分断するとともに基板20の表面20aを僅かに超えて形成された例である。
切削ブレード :外径52mm、厚さ40μm
切削ブレードの回転速度:30000rpm
切削送り速度 :50mm/秒
図8に示す実施形態は、上記図4に示すようにレーザー加工溝210が機能層21を切断するとともに基板20の表面20aを僅かに超えて形成された半導体ウエーハ2に対して上記切削溝形成工程を実施した例であり、レーザー加工溝210の底に達する切削溝220が形成される。従って、半導体ウエーハ2は個々のデバイス23に分割される。
20:基板
21:機能層
22:分割予定ライン
23:デバイス
210:レーザー加工溝
220:切削溝
3:レーザー加工装置
31:レーザー加工装置のチャックテーブル
32:レーザー光線照射手段
322:集光器
4:保護部材
5:切削装置
51:切削装置のチャックテーブル
52:切削手段
523:切削ブレード
6:環状のフレーム
60:ダイシングテープ
7:テープ拡張装置
71:フレーム保持手段
72:テープ拡張手段
73:ピックアップコレット
Claims (3)
- 基板の表面に積層された機能層に格子状に形成された複数の分割予定ラインによって区画された複数の領域にデバイスが形成されたウエーハを、分割予定ラインに沿って分割するウエーハの加工方法であって、
ウエーハを構成する機能層に形成された分割予定ラインに沿ってレーザー光線を照射することにより機能層をアブレーション加工し、機能層を分割予定ラインに沿って切断するレーザー加工溝を形成する機能層切断工程と、
該機能層切断工程が実施されたウエーハを構成する機能層の表面に保護部材を貼着する保護部材貼着工程と、
該保護部材貼着工程が実施されたウエーハの該保護部材側をチャックテーブルに保持し、ウエーハを構成する基板の裏面側から分割予定ラインと対応する領域に切削ブレードを位置付けて機能層に至らない切削溝を形成する切削溝形成工程と、
該切削溝形成工程が実施されたウエーハを構成する基板の裏面にダイシングテープを貼着しダイシングテープの外周部を環状のフレームによって支持するとともに、該保護部材を剥離するウエーハ支持工程と、
該ウエーハ支持工程が実施されたウエーハを構成する基板の裏面が貼着されたダイシングテープを拡張してデバイス間を広げるテープ拡張工程と、を含む、
ことを特徴とするウエーハの加工方法。 - 該切削溝形成工程においては機能層を切断した該レーザー加工溝の底に達しない該切削溝を形成し、該拡張工程においてはダイシングテープを拡張してウエーハを個々のデバイスに分割する、請求項1記載のウエーハの加工方法。
- 該切削溝形成工程においては機能層を切断した該レーザー加工溝の底に達する該切削溝を形成することにより、ウエーハを個々のデバイスに分割する、請求項1記載のウエーハの加工方法。
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