JP4847199B2 - ウエーハに装着された接着フィルムの破断方法 - Google Patents
ウエーハに装着された接着フィルムの破断方法 Download PDFInfo
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- JP4847199B2 JP4847199B2 JP2006120354A JP2006120354A JP4847199B2 JP 4847199 B2 JP4847199 B2 JP 4847199B2 JP 2006120354 A JP2006120354 A JP 2006120354A JP 2006120354 A JP2006120354 A JP 2006120354A JP 4847199 B2 JP4847199 B2 JP 4847199B2
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- 239000002313 adhesive film Substances 0.000 title claims description 156
- 238000000034 method Methods 0.000 title claims description 75
- 238000005520 cutting process Methods 0.000 claims description 108
- 238000001816 cooling Methods 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 description 98
- 238000000227 grinding Methods 0.000 description 13
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 7
- 230000001678 irradiating effect Effects 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 229910009372 YVO4 Inorganic materials 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- H01L21/67011—Apparatus for manufacture or treatment
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- 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
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- B23K2103/00—Materials to be soldered, welded or cut
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Description
また、レーザー光線を照射して接着フィルムを切断すると、接着フィルムが溶融してダイシングテープに癒着して半導体チップをダイシングテープからピックアップすることができないという問題がある。
環状のフレームに装着されたダイシングテープの表面にウエーハの該接着フィルム側を貼着するウエーハ支持工程と、
該ダイシングテープに該接着フィルム側を貼着したウエーハを、分割予定ラインに沿ってデバイス毎に切断するとともに該接着フィルムを一部の切り残し部を残存させて不完全切断する切断工程と、
該切断工程を実施した後に、該ダイシングテープを拡張して該接着フィルムを個々のデバイスに沿って破断する接着フィルム破断工程と、を含む、
ことを特徴とするウエーハに装着された接着フィルムの破断方法が提供される。
また、上記切断工程において接着フィルムに残存される切り残し部の厚さは、20μm以下に設定されている。
上記接着フィルム破断工程においては、接着フィルムを冷却し伸縮性を低下させてダイシングテープを拡張することが望ましい。
環状のフレームに装着されたダイシングテープの表面にウエーハの該接着フィルム側を貼着するウエーハ支持工程と、
該ダイシングテープに貼着された該接着フィルムを、個々のデバイスに沿って一部の切り残し部を残存させて不完全切断する切断工程と、
該切断工程を実施した後に、該ダイシングテープを拡張して該接着フィルムを個々のデバイスに沿って破断する接着フィルム破断工程と、を含む、
ことを特徴とするウエーハに装着された接着フィルムの破断方法が提供される。
また、上記切断工程において接着フィルムに残存される切り残し部の厚さは、20μm以下に設定されている。
上記接着フィルム破断工程においては、接着フィルムを冷却し伸縮性を低下させてダイシングテープを拡張することが望ましい。
また、本発明によれば、切断工程においてウエーハの裏面に装着された接着フィルムは一部の切り残し部を残存させて不完全切断され、接着フィルム破断工程において接着フィルムを冷却し伸縮性を低下させてダイシングテープを拡張することにより、接着フィルムを個々のデバイスに沿って確実に破断することができる。
図4に示す実施形態は、ダイシングテープの表面に予め接着フィルムが貼着された接着フィルム付きのダイシングテープを使用する。即ち、図4の(a)および(b)に示すように環状のフレーム4の内側開口部を覆うように外周部が装着されたダイシングテープ40の表面40aに貼着された接着フィルム3を、半導体ウエーハ2の裏面2bに装着する。このとき、80〜200°Cの温度で加熱しつつ接着フィルム3を半導体ウエーハ2の裏面2bに押圧して装着する。なお、接着フィルム付きのダイシングテープは、株式会社リンテック社製の接着フィルム付きのダイシングテープ(LE5000)を用いることができる。
切削ブレード :外径52mm、厚さ40μm
切削ブレードの回転速度:40000rpm
切削送り速度 :50mm/秒
この実施形態においては、図8に示すレーザー加工装置6を用いて実施する。図8に示すレーザー加工装置6は、被加工物を保持するチャックテーブル61と、該チャックテーブル61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62と、チャックテーブル61上に保持された被加工物を撮像する撮像手段63を具備している。チャックテーブル61は、被加工物を吸引保持するように構成されており、図示しない移動機構によって図6において矢印Xで示す加工送り方向および矢印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8に示すレーザー加工装置6のチャックテーブル61上に半導体ウエーハ2の接着フィルム3側が貼着されたダイシングテープ40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、ダイシングテープ40を介して半導体ウエーハ2をチャックテーブル61上に保持する。なお、図8においてはダイシングテープ40が装着された環状のフレーム4を省いて示しているが、環状のフレーム4はチャックテーブル61に配設された適宜のフレーム保持手段に保持される。半導体ウエーハ2を吸引保持したチャックテーブル61は、図示しない移動機構によって撮像手段63の直下に位置付けられる。
レーザー光線の光源 :YVO4レーザーまたはYAGレーザー
波長 :355nm
繰り返し周波数 :20kHz
平均出力 :3W
集光スポット径 :φ5μm
加工送り速度 :100mm/秒
上述した切断工程を半導体ウエーハ2に形成された全てのストリート21に実施する
この実施形態は、上記図1に示す半導体ウエーハ2を先ダイシング法によって個々のデバイスに分割した後に、半導体ウエーハ2の裏面に接着フィルム3を貼着し、この接着フィルム3を各デバイスに沿って破断する方法である。なお、この場合、図1に示す半導体ウエーハ2の厚さは、例えば600μmに形成されている。先ず、半導体ウエーハ2を先ダイシング法によって個々のデバイスに分割する手順について説明する。
レーザー光線の種類 :YVO4レーザーまたはYAGレーザー
波長 :355nm
繰り返し周波数 :50kHz
平均出力 :3W
集光スポット径 :φ9.2μm
加工送り速度 :200mm/秒
21:ストリート
22:デバイス
3:接着フィルム
4:環状のフレーム
40:ダイシングテープ
5:切削装置
51:切削装置のチャックテーブル
52:切削手段
521:切削ブレード
6:レーザー加工装置
61:レーザー加工装置のチャックテーブル
62:レーザー光線照射手段
622:集光器
7:テープ拡張装置
71:フレーム保持手段
711:フレーム保持部材
712:クランプ
72:テープ拡張手段
721:拡張ドラム
73:支持手段
731:エアシリンダ
732:ピストンロッド
8:保護部材
9:研削装置
91:研削装置のチャックテーブル
92:研削砥石
93:研削手段
Claims (7)
- 表面に格子状に形成された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の裏面に装着されたダイボンディング用の接着フィルムを、個々のデバイスに沿って破断する方法であって、
環状のフレームに装着されたダイシングテープの表面にウエーハの該接着フィルム側を貼着するウエーハ支持工程と、
該ダイシングテープに該接着フィルム側を貼着したウエーハを、分割予定ラインに沿ってデバイス毎に切断するとともに該接着フィルムを一部の切り残し部を残存させて不完全切断する切断工程と、
該切断工程を実施した後に、該接着フィルムを冷却し伸縮性を低下させて該ダイシングテープを拡張することにより該接着フィルムを個々のデバイスに沿って破断する接着フィルム破断工程と、を含む、
ことを特徴とするウエーハに装着された接着フィルムの破断方法。 - 該切断工程は、切削ブレードを備えた切削装置によって実施される、請求項1記載のウエーハに装着された接着フィルムの破断方法。
- 該切断工程は、パルスレーザー光線を照射するレーザー加工装置によって実施される、請求項1記載のウエーハに装着された接着フィルムの破断方法。
- 該切断工程において該接着フィルムに残存される切り残し部の厚さは、20μm以下に設定されている、請求項1から3のいずれかに記載のウエーハに装着された接着フィルムの破断方法。
- 複数のデバイスに分割されたウエーハの裏面に装着されたダイボンディング用の接着フィルムを、個々のデバイスに沿って破断する方法であって、
環状のフレームに装着されたダイシングテープの表面にウエーハの該接着フィルム側を貼着するウエーハ支持工程と、
該ダイシングテープに貼着された該接着フィルムを、個々のデバイスに沿って一部の切り残し部を残存させて不完全切断する切断工程と、
該切断工程を実施した後に、該接着フィルムを冷却し伸縮性を低下させて該ダイシングテープを拡張することにより該接着フィルムを個々のデバイスに沿って破断する接着フィルム破断工程と、を含む,
ことを特徴とするウエーハに装着された接着フィルムの破断方法。 - 該切断工程は、パルスレーザー光線を照射するレーザー加工装置によって実施される、請求項5記載のウエーハに装着された接着フィルムの破断方法。
- 該切断工程において該接着フィルムに残存される切り残し部の厚さは、20μm以下に設定されている、請求項5又は6記載のウエーハに装着された接着フィルムの破断方法。
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TW096113368A TWI438834B (zh) | 2006-04-25 | 2007-04-16 | 分割結合至晶圓之黏著劑膜的方法 |
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