JPWO2013141251A1 - フィルム、ワーク加工用シート基材およびワーク加工用シート - Google Patents
フィルム、ワーク加工用シート基材およびワーク加工用シート Download PDFInfo
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- JPWO2013141251A1 JPWO2013141251A1 JP2014506248A JP2014506248A JPWO2013141251A1 JP WO2013141251 A1 JPWO2013141251 A1 JP WO2013141251A1 JP 2014506248 A JP2014506248 A JP 2014506248A JP 2014506248 A JP2014506248 A JP 2014506248A JP WO2013141251 A1 JPWO2013141251 A1 JP WO2013141251A1
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- energy ray
- adhesive
- acrylate
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- 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
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Abstract
Description
(1)25℃における粘度が100〜5,000,000mPa・Sのエネルギー線硬化性樹脂と、重合性シリコーン化合物とを含む、エネルギー線硬化性組成物を製膜、硬化してなるフィルム。
エネルギー線硬化性樹脂は、23℃における粘度が100〜5,000,000mPa・s、好ましくは300〜2,000,000mPa・s、さらに好ましくは500〜1,000,000mPa・sの範囲にある。また、60℃における粘度が、好ましくは100〜200,000mPa・s、さらに好ましくは300〜100,000mPa・sの範囲にある。粘度が低すぎる場合には、厚膜の塗工が困難になり、所望の厚みのフィルムが得られないことがある。また、粘度が高すぎる場合には、塗工自体が困難になることがある。
具体的には、ポリエーテル型ジオールとしては、ポリエチレングリコール、ポリプロピレングリコール、ポリブチレングリコール、ポリテトラメチレングリコールがあげられ、さらに特に好ましいポリエーテル型ジオールとしては、ポリエチレングリコール、ポリプロピレングリコール等があげられる。
エネルギー線硬化性組成物は、上記エネルギー線硬化性樹脂と、重合性シリコーン化合物とを含む。
エネルギー線硬化性樹脂組成物は、上記エネルギー線硬化性樹脂と重合性シリコーン化合物とを含むものであり、該エネルギー線硬化性樹脂組成物を製膜、硬化することでフィルムが得られる。
本発明に係るフィルムは、上記エネルギー線硬化性組成物を製膜、硬化してなるものである。このフィルムは、表面タック性が抑制されることから、フィルムがブロッキングを起し、シートを搬送するためのロール類にシートが密着し、シートの製造や、搬送が中断されることがない。また、本発明のフィルムは、自立膜として利用可能な機械的強度を有し、エキスパンド性や応力緩和性に優れることから、特にバックグラインドシートやダイシングシートなどの各種のワーク加工用シートの基材として好ましく用いられる。
本発明のワーク加工用シート基材(以下、単に「基材」ということがある)は、上述の本発明のフィルムを含むものである。前記基材は、上述の本発明のフィルム単層であってもよく、上述の本発明のフィルムの複層品であってもよい。また、前記基材は、上述の本発明のフィルムと、ポリオレフィンフィルム、ポリ塩化ビニルフィルム、ポリエチレンテレフタレートフィルムなどの他のフィルムとの積層フィルムであってもよい。なかでも、本発明の効果が特に得られるという点から、本発明のフィルムワーク加工用シート基材は、上述の本発明のフィルム単層であることが好ましい。
本発明のワーク加工用シートは、上記ワーク加工用シート基材の少なくとも片面に接着性樹脂層を有するものである。
本発明のワーク加工用シートをバックグラインドシートなどの表面保護シートや、ダイシングシートとして用いる場合には、接着性樹脂層3は、感圧接着性を有する粘着剤層からなることが好ましい。
また、本発明のワーク加工用シート1において、接着性樹脂層3は、フィルム状接着剤であってもよい。このようなフィルム状接着剤は、チップのダイボンド工程において近年多用されている。このようなフィルム状接着剤は、好ましくはエポキシ系接着剤またはポリイミド系接着剤を製膜、半硬化したもの(B−ステージ状態)であり、本発明のワーク加工用シート基材上に剥離可能に形成され、本発明のワーク加工用シート1が得られる。また、基材2の片面に上述した粘着剤層を形成し、粘着剤層上にフィルム状接着剤を積層してもよい。
さらに、本発明のワーク加工用シート1は、ダイシング時のウエハ固定機能とダイボンド時のダイ接着機能とを同時に兼ね備えたダイシング・ダイボンド兼用シートであってもよい。
さらに、本発明のワーク加工用シート1がチップの裏面に保護膜を形成するための保護膜形成用のシートとして用いられる場合には、接着性樹脂層3は、チップの裏面に保護膜を形成するための保護膜形成層であってもよい。この場合、保護膜形成層に半導体ウエハを貼付し、保護膜形成層を硬化させ、保護膜とし、その後、半導体ウエハと保護膜をダイシングし、保護膜を有するチップを得ることができるが、保護膜形成層の硬化、ダイシングの順は特に限定はされない。たとえば、ダイシングの前に保護膜形成層を硬化してもよく、またダイシングの後に保護膜形成を硬化してもよく、さらに最終的に行われる樹脂封止時の加熱工程において保護膜形成層を硬化してもよい。このような保護膜形成用のシートは、基材2上に接着性樹脂層3として、保護膜となる接着性の樹脂層(保護膜形成層)を有する。また、基材2の片面に上述した粘着剤層を形成し、粘着剤層上に保護膜形成層を積層してもよい。このような保護膜となる接着性樹脂層3は、前記したアクリル系粘着剤と、エポキシ接着剤および硬化助剤を含み、また必要に応じフィラー等が含まれていても良い。
基材の作成時に工程シートに接していた側の基材面について、下記条件で静摩擦係数を測定した。
基材の作成時に使用した工程シートの表面において、下記条件で4種類の元素の付着量を測定し、付着した4元素の合計に対するケイ素(Si)の質量比率を求めた。
装置:株式会社 島津製作所 ESCA−3400
真空度:1.0×10−6Pa
X線源:Mg
放出電流値:10mA
加速電圧:10kV
測定元素:炭素(C)、酸素(O)、窒素(N)、ケイ素(Si)
実施例、比較例で得られたフィルムをロール状にして23℃50%RH環境下で7日間保管した後、フィルムを巻き戻してブロッキングの有無を確認した。
下記の裏面研削時の工程適性およびダイシング時の工程適性において、いずれもワーク加工用シートが装置内のテーブルに固着しなかった場合を良好と判定し、どちらか一方の工程で固着したり、搬送エラーが発生した場合を、不良と判定した。
実施例、比較例で得られたワーク加工用シートを、テープラミネーター(リンテック社製「RAD3510F/12」)を用いてシリコンウェハ(直径8インチ、厚み700μm)に貼付し、グラインダー(DISCO社製「DFG8760−RAD2700F/12」)でウエハの裏面を50μmまで研削し、引き続き同装置内で、研削済みのウェハにダイアタッチフィルム(日立化成社製「DF−400」)をラミネート温度(130℃×3分、キュア温度:180℃×1分)にてラミネートを行った。ワーク加工用シートが、装置内の研削テーブルまたはラミネートテーブルに固着したり、搬送エラーが発生したりした場合を、裏面研削時の工程適性が不良であると判定した。
実施例、比較例で得られたワーク加工用シートの内周部にシリコンウェハ(直径6インチ、厚み350μm)を、外周部に6インチ用金属製リングフレームに貼付し、ダイシング装置(DISCO社製「DFD−651」)を使って、以下の条件でブレードダイシングを行い、チップ化した。
装置:DISCO社製DFD−651
チップサイズ:10mm×10mm
カット速度:80mm/sec.
ブレード:DISCO社製NBC−ZH2050−27HECC
A:両末端に反応性2重結合官能基を有する重量平均分子量(Mw)6,000のポリカーボネート系ウレタンアクリレートオリゴマー60質量部とトリシクロデカンアクリレート15質量部とシクロヘキシルアクリレート10質量部とフェノキシエチルアクリレート15質量部と2,4,6−トリメチルベンゾイル−ジフェニル−ホスフィンオキサイド(BASF社製ルシリン TPO、固形分濃度100質量%)を0.5質量部配合した配合物(荒川化学製 ビームセット541 η=6,000mPa・s(25℃))
B:両末端に反応性2重結合官能基を有する重量平均分子量(Mw)6,000のポリカーボネート系ウレタンアクリレートオリゴマー60質量部とイソボルニルアクリレート20質量部とテトラヒドロフルフリルアクリレート15質量部とフェノキシエチルアクリレート5質量部と2,4,6−トリメチルベンゾイル−ジフェニル−ホスフィンオキサイド(BASF社製ルシリン TPO、固形分濃度100質量%)を0.5質量部配合した配合物(荒川化学製 ビームセット543 η=5,000mPa・s(25℃))
C:両末端に反応性2重結合官能基を有する重量平均分子量(Mw)10,000のポリエステル系ウレタンアクリレートオリゴマー40質量部とイソボルニルアクリレート40質量部と2−ヒドロキシフェノキシプロピルアクリレート20質量部と2−ヒドロキシ−2−メチル−1−フェニル−プロパン−1−オン(BASF社製:ダロキュア 1173、固形分濃度100質量%)を0.5質量部配合した配合物(荒川化学製 η=4,500mPa・s(25℃))
D:両末端に反応性2重結合官能基を有する重量平均分子量(Mw)30,000のポリプロピレングリコール系ウレタンアクリレートオリゴマー60質量部とイソボルニルアクリレート40質量部と2−ヒドロキシ−2−メチル−1−フェニル−プロパン−1−オン(BASF社製:ダロキュア 1173、固形分濃度100質量%)を0.5質量部配合した配合物(荒川化学製 η=4,100mPa・s(25℃))
a:Ebecryl350(ダイセルサイテック株式会社、シリコーンジ(メタ)アクリレート)
b:CN9800(アルケマ株式会社、シリコーンジアクリレート)
c:KRM8495(ダイセルサイテック社製)
d:CN990(アルケマ株式会社、分子内にウレタン結合を含有するウレタン変性シリコーンアクリレートオリゴマー)
ブチルアクリレート84重量部、メチルメタクリレート10重量部、アクリル酸1重量部、2−ヒドロキシエチルアクリレート5重量部からなる共重合体(重量平均分子量MW:700,000)のトルエン30重量%溶液に対して、多価イソシアナート化合物(コロネートL(日本ポリウレタン社製)3重量部を混合した粘着組成物
(エネルギー線硬化性組成物)
表1に記載のエネルギー線硬化性樹脂および重合性シリコーン化合物を所定の割合で混合し、エネルギー線硬化性組成物を得た。表中の重合性シリコーン化合物の添加量は、エネルギー線硬化性樹脂と重合性シリコーン化合物との合計100質量%に対する割合を示す。
得られたエネルギー線硬化性組成物を25℃でファウンテンダイ方式で工程シートであるPETフィルム(東レ製 ルミラーT60 PET 50 T−60 トウレ 50μm品)上に厚みが100μmとなるように塗布し、エネルギー線硬化性組成物層を形成した。紫外線照射装置としてアイグラフィクス社製 ベルトコンベア式紫外線照射装置(製品名:ECS−401GX)を使用し、高圧水銀ランプ(アイグラフィクス社製高圧水銀ランプ 製品名:H04−L41)にて、紫外線ランプ高さ150mm、紫外線ランプ出力3kw(換算出力120mW/cm)、光線波長365nmの照度が271mW/cm2、光量が177mJ/cm2(紫外線光量計:株式会社オーク製作所社製 UV−351)となる装置条件で紫外線照射を行った。紫外線照射直後に、エネルギー線硬化性組成物層の上に剥離フィルム(リンテック社製 SP−PET3801)をラミネートした。なお、ラミネートは、剥離フィルムの剥離処理面がエネルギー線硬化性組成物と接するようにした。次いで、同紫外線照射装置を使用し、紫外線ランプ高さ150mm、光線波長365nmの照度が271mW/cm2、光量が600mJ/cm2(紫外線光量計:株式会社オーク製作所社製 UV−351)の条件にて、ラミネートした剥離フィルム側から2回の紫外線照射を行ない、エネルギー線硬化性組成物層に与えた紫外線の総光量を1377mJ/cm2とし、エネルギー線硬化性組成物層を架橋・硬化させた。
その後、別途調整した厚み10μmの接着性樹脂層を、ラミネーターを使ってフィルムに貼り合わせ、ワーク加工用シートを得た。ワーク加工用シートについて工程適性を評価した。結果を表1に示す。
表1に記載のエネルギー線硬化性樹脂および重合性シリコーン化合物を所定の割合で混合して得たエネルギー線硬化性組成物を用いた以外は実施例1と同様とした。なお、比較例では、重合性シリコーン化合物を用いずに、エネルギー線硬化性樹脂A〜Dを製膜、硬化し、基材を得た。結果を表1に示す。
2:ワーク加工用シート基材
3:接着性樹脂層
Claims (9)
- 25℃における粘度が100〜5,000,000mPa・Sのエネルギー線硬化性樹脂と、重合性シリコーン化合物とを含む、エネルギー線硬化性組成物を製膜、硬化してなるフィルム。
- 重合性シリコーン化合物の質量割合が、1.0質量%以下である、請求項1に記載のフィルム。
- 前記重合性シリコーン化合物は、有機変性重合性シリコーン化合物である請求項1に記載のフィルム。
- 前記有機変性重合性シリコーン化合物は、ウレタン変性シリコーン(メタ)アクリレートまたはウレタン変性シリコーン(メタ)アクリレートオリゴマーである請求項3に記載のフィルム。
- 前記エネルギー線硬化性樹脂は、ウレタンアクリレート系オリゴマーと、エネルギー線重合性モノマーとの混合物である請求項1〜4のいずれかに記載のフィルム。
- 請求項1〜5のいずれかに記載のフィルムを含むワーク加工用シート基材。
- 請求項6に記載の基材の少なくとも片面に接着性樹脂層を有するワーク加工用シート。
- 接着性樹脂層が感圧接着性を有する粘着剤層である請求項7に記載のワーク加工用シート。
- 接着性樹脂層が、感圧接着性を有し、かつダイ接着機能を有する粘接着剤層である請求項7に記載のワーク加工用シート。
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KR101776065B1 (ko) | 2014-09-25 | 2017-09-07 | 코오롱인더스트리 주식회사 | 나노패턴을 포함하는 광학시트 및 그 제조방법 |
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CN106206397B (zh) * | 2016-08-05 | 2020-02-07 | 厦门市三安光电科技有限公司 | 用于半导体器件的薄膜及半导体器件的制作方法 |
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CN104204012A (zh) | 2014-12-10 |
TW201410458A (zh) | 2014-03-16 |
KR20140138738A (ko) | 2014-12-04 |
JP6035325B2 (ja) | 2016-11-30 |
WO2013141251A1 (ja) | 2013-09-26 |
US20150111032A1 (en) | 2015-04-23 |
TWI592300B (zh) | 2017-07-21 |
KR102085533B1 (ko) | 2020-03-06 |
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