JP2011518251A - 粘着フィルム及びこれを使用したバックグラインディング方法 - Google Patents
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Abstract
Description
23℃で靭性値が240Kg・mm未満の基材フィルムと、
上記基材フィルム上に形成された粘着層と、を含む。
本発明の粘着フィルムは、特定条件で行われる引張試験での靭性値が最適化された基材フィルムを含むことを特徴とする。
単量体成分としてイソボルニルアクリレート(IBOA)を5重量部の量で含み、樹脂のガラス転移温度が−25℃となるように、イソボルニルアクリレート、メチルアクリレート、エチルアクリレート、n−ブチルアクリレート及び2−ヒドロキシエチルアクリレートを混合し、単量体混合物(100重量部)を製造した後、これを重合して固形分の含量が45重量%のアクリル系粘着樹脂を製造した。次に、製造された粘着樹脂にイソシアネート系硬化剤を粘着樹脂100重量部に対して2重量部の量で添加した。次に、靭性値が137Kg・mm、20℃での貯蔵弾性率が5×107Pa、延伸率が434%、引張強度が139Kg/cm2のエチレン−酢酸ビニル共重合体フィルム(EVA)に塗布及び乾燥し、粘着フィルムを製造した。この時、基材フィルムの靭性値、貯蔵弾性率、延伸率及び引張強度は、下記の方法で評価した。
測定機器(XP plus、TA(製))の機械方向に15mm、機械方向と直交する方向に35mmのサイズで基材フィルムを切断して試験片を製造した後、試験片の縦方向(機械方向と直交する方向)に上端と下端に各々10mmの長さだけテープで試験片を取り囲む。次に、測定機器で試験片の上端及び下端にテーピング(taping)された部分(10mm)を固定させ、200mm/minの引張速度の条件で引張しながら、試験片が切断されるまでの距離(distance)によって測定された荷重(force)のグラフ(X軸:distance、Y軸:force)をフィルムの広さ及び厚さを適用して延伸率(elongation)と引張強度(tensile strength)のグラフ(X軸:elongation、Y軸:tensile strength)で示す。このように示されたグラフの初期勾配値を通じて引張弾性率(tensile modulus)を計算することができ、グラフの面積を通じて靭性値(toughness)を把握することができる。また、試験片の縦方向に中間部分に1mmずつの切欠(notch)を形成して上記のような方式で引張しながら、試験片の靭性値(toughness)を比較することができる。
フィルムを測定機器の機械方向30mm及び機械方向と直交する方向に5mmのサイズで切断して試験片を製造する。製造された試験片に対して測定機器(動的粘弾性測定装置、Q800、TA(製))を使用して、1Hzの周波数で、−10℃乃至100℃の温度範囲で3℃/分の速度で昇温しながら貯蔵弾性率を測定する。
基材フィルムの種類及び物性を下記表1に示されたように変更したことを除いて、上記実施例1と同一の方法で粘着フィルムを製造した。
ウエハマウンタで8インチシリコンウエハ(Si-Wafer)に実施例及び比較例で製造された粘着フィルム(保護フィルム)を付着し、エキスパンダー(Expander、HS−1810、Hugle electronics Inc)でフィルムをウエハ形状に沿って切断した。次に、ステージの高さを3に調整し、粘着フィルムの切断面を観察した。具体的に切断開始点と中間部分を顕微鏡(Optical Microscope)で観察し、切断面のバー生成程度と切断時に破断された部分の面積を求め、下記基準で切断性を比較した。
○:フィルムの切断開始部分を50倍率で観察する時、解像度640×480の面積部分で見えるフィルム全面積に対して破断によって生成された部分の面積の比が3%未満の場合
△::フィルムの切断開始部分を50倍率で観察する時、解像度640×480の面積部分で見えるフィルム全面積に対して破断によって生成された部分の面積の比が4%乃至7%の場合
×:フィルムの切断開始部分を50倍率で観察する時、解像度640×480の面積部分で見えるフィルム全面積に対して破断によって生成された部分の面積の比が8%以上の場合
ウエハマウンタ(DS Precision Inc.DYWMDS−8’)を使用して、8インチのシリコンウエハに粘着フィルムを付着し、付着されたウエハの表面を観察し、ラミネート気泡が発生した部分を計数した後、発生した気泡の数が3個以下なら、○、4乃至7個であれば△、8個以上なら×で評価した。
ウエハマウンタで8インチのシリコンウエハに粘着フィルムを付着した後、エキスパンダー(Expander)でフィルムをウエハ形状に沿って切断した後、ウエハ裏面研磨機(SVG−502MKII8)を使用して、ウエハの損傷及びクラックの回数を評価した。具体的に、研削を5回実施し、ウエハ損傷の回数が0回なら○、1回なら△、2回以上なら×で評価した。
上記方法によって測定した結果を下記表2に整理して記載した。
20 粘着層
30 剥離フィルム
Claims (16)
- 23℃で靭性値が240Kg・mm未満の基材フィルム;及び
上記基材フィルム上に形成された粘着層を含む粘着フィルム。 - 基材フィルムは、20℃乃至25℃の温度で靭性値が240Kg・mm以下である、請求項1に記載の粘着フィルム。
- 基材フィルムは、靭性値が210Kg・mm以下である、請求項1に記載の粘着フィルム。
- 基材フィルムは、延伸率が700%未満である、請求項1に記載の粘着フィルム。
- 基材フィルムは、20℃での貯蔵弾性率が1×107Pa乃至1×109Paである、請求項1に記載の粘着フィルム。
- 基材フィルムは、ポリオレフィンフィルム、ポリエステルフィルム、ポリビニルクロライド、ポリエステルエラストマー、またはウレタン系フィルムである、請求項1に記載の粘着フィルム。
- 基材フィルムは、厚さが50μm乃至300μmである、請求項1に記載の粘着フィルム。
- 粘着層は、シリコン系粘着剤、合成ゴム系粘着剤、天然ゴム系粘着剤またはアクリル系粘着剤を含む、請求項1に記載の粘着フィルム。
- アクリル系粘着剤は、(メタ)アクリル酸エステル系単量体90重量部乃至99.9重量部;及び架橋性官能基含有単量体0.1重量部乃至10重量部とを含有する単量体の共重合体を含む、請求項8に記載の粘着フィルム。
- (メタ)アクリル酸エステル系単量体は、イソボルニル(メタ)アクリレートを含む、請求項9に記載の粘着フィルム。
- 共重合体は、ガラス転移温度が−50℃乃至15℃である、請求項9に記載の粘着フィルム。
- 共重合体は、重量平均分子量が5万乃至70万である、請求項9に記載の粘着フィルム。
- 粘着剤は、共重合体100重量部に対して0.1重量部乃至10重量部の架橋剤をさらに含む、請求項9に記載の粘着フィルム。
- 粘着層は、厚さが0.5μm乃至50μmである、請求項1に記載の粘着フィルム。
- 粘着層上に形成された剥離フィルムをさらに含む、請求項1に記載の粘着フィルム。
- 半導体ウエハに請求項1に記載の粘着フィルムを付着する第1段階;及び
粘着フィルムが付着された半導体ウエハの裏面を研磨する第2段階を含むバックグラインディング方法。
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KR20080036718 | 2008-04-21 | ||
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PCT/KR2009/002082 WO2009131363A2 (ko) | 2008-04-21 | 2009-04-21 | 점착 필름 및 이를 사용한 백그라인딩 방법 |
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JP (2) | JP6176432B2 (ja) |
CN (1) | CN102015937B (ja) |
TW (1) | TWI553083B (ja) |
WO (1) | WO2009131363A2 (ja) |
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Cited By (4)
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JP2016047933A (ja) * | 2008-04-21 | 2016-04-07 | エルジー・ケム・リミテッド | 粘着フィルム及びこれを使用したバックグラインディング方法 |
JP2017179027A (ja) * | 2016-03-29 | 2017-10-05 | リンテック株式会社 | ガラスダイシング用粘着シートおよびその製造方法 |
JP2017179029A (ja) * | 2016-03-29 | 2017-10-05 | リンテック株式会社 | ガラスダイシング用粘着シートおよびその製造方法 |
JP2017179028A (ja) * | 2016-03-29 | 2017-10-05 | リンテック株式会社 | ガラスダイシング用粘着シートおよびその製造方法 |
Also Published As
Publication number | Publication date |
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TW201009036A (en) | 2010-03-01 |
WO2009131363A3 (ko) | 2010-03-11 |
EP2267090A4 (en) | 2016-05-25 |
WO2009131363A2 (ko) | 2009-10-29 |
JP2016047933A (ja) | 2016-04-07 |
EP2267090B8 (en) | 2018-10-17 |
JP6176432B2 (ja) | 2017-08-09 |
TWI553083B (zh) | 2016-10-11 |
EP2267090A2 (en) | 2010-12-29 |
US20110091676A1 (en) | 2011-04-21 |
CN102015937A (zh) | 2011-04-13 |
WO2009131363A9 (ko) | 2010-01-21 |
CN102015937B (zh) | 2014-11-12 |
EP2267090B1 (en) | 2018-09-12 |
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