JP7331248B2 - 半導体用接着剤組成物およびその硬化物を含む半導体用接着フィルム - Google Patents
半導体用接着剤組成物およびその硬化物を含む半導体用接着フィルム Download PDFInfo
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Description
(1)熱可塑性樹脂の製造
トルエン100gに、ブチルアクリレート40g、エチルアクリレート26g、アクリロニトリル25g、メチルメタクリレート5g、グリシジルメタクリレート10g、熱開始剤アゾビスイソブチロニトリル(Azobisisobutyronitrile)(AIBN)0.1gを混合して、100℃で約12時間反応させて、グリシジル基が分枝鎖に導入された熱可塑性アクリレート系樹脂を製造した。
エポキシ樹脂の硬化剤であるフェノール樹脂KH-6021(DIC社製品、ビスフェノールAノボラック樹脂、水酸基当量121g/eq、軟化点:133℃)50g、液状エポキシ樹脂RE-310S(日本化薬製品、ビスフェノールAエポキシ樹脂、エポキシ当量180g/eq、粘度[25℃]:15,000mPa・s)30g、固体状エポキシ樹脂EOCN-104S(日本化薬製品、クレゾールノボラック型エポキシ樹脂、エポキシ当量214g/eq、軟化点:92℃)30g、前記熱可塑性アクリレート系樹脂40g、シランカップリング剤(KBM-403、信越化学、ガンマ-グリシドキシプロピルトリメトキシシラン)1g、硬化触媒2PZ(四国化成、2-フェニルイミダゾール)0.2g、および無機充填剤SC-2050(アドマテックス、球状シリカ、平均粒径約400nm)90g、および溶媒であるメチルエチルケトンに混合して混合物を用意し、前記液状エポキシ樹脂、前記固体状エポキシ樹脂、および前記熱可塑性アクリレート系樹脂の総含有量100重量部に対して約0.5重量部で非イオン性界面活性剤であるポリソルベート(東京化成工業、TWEEN80(登録商標))を添加して前記半導体用接着剤組成物(固形分濃度40重量%)を得た。
70℃の温度下、一辺が3mmである正方形の第1半導体素子(厚さ50μm)の一面に、前記厚さ10μmの半導体用接着フィルムを付着させた。前記第1半導体素子を前記接着フィルムを介してBGA基板に接着した。
前記実施例1の接着フィルム用樹脂組成物溶液の製造過程において、非イオン性界面活性剤であるポリソルベート(東京化成工業、TWEEN80(登録商標))を、前記液状エポキシ樹脂、前記固体状エポキシ樹脂、および前記熱可塑性アクリレート系樹脂の総含有量100重量部に対して約7重量部含ませたことを除き、前記実施例1と同様に前記半導体装置を製造した。
前記実施例1の接着フィルム用樹脂組成物溶液の製造過程において、非イオン性界面活性剤であるポリソルベート(東京化成工業、TWEEN80(登録商標))の代わりに、ポリエチレングリコール(Sigma-Aldrich社、Triton X-100)を、前記液状エポキシ樹脂、前記固体状エポキシ樹脂、および前記熱可塑性アクリレート系樹脂の総含有量100重量部に対して約2重量部含ませたことを除き、前記実施例1と同様に前記半導体装置を製造した。
前記実施例1において非イオン性界面活性剤を含まないことを除き、実施例1と同様に前記半導体装置を製造した。
前記実施例1の半導体用接着剤組成物の製造過程において、非イオン性界面活性剤であるポリソルベート(東京化成工業、TWEEN80(登録商標))を、前記液状エポキシ樹脂、前記固体状エポキシ樹脂、および前記熱可塑性アクリレート系樹脂の総含有量100重量部に対して約0.02重量部含ませたことを除き、前記実施例1と同様に前記半導体装置を製造した。
前記実施例1の接着フィルム用樹脂組成物溶液の製造過程において、非イオン性界面活性剤であるポリソルベート(東京化成工業、TWEEN80(登録商標))を、前記液状エポキシ樹脂、前記固体状エポキシ樹脂、および前記熱可塑性アクリレート系樹脂の総含有量100重量部に対して約15重量部含ませたことを除き、前記実施例1と同様に前記半導体装置を製造した。
前記実施例および比較例で記載した半導体装置のように、第2半導体素子が接着されたBGA基板を、加圧乾燥機で135℃、1時間、7気圧の条件で熱処理して接着フィルムを熱硬化させて半導体装置を作製した。
前記実験例1のように半導体装置を作製した後、第2半導体素子の周辺に広がり出た接着剤の量を測定し、素子1個あたり最も多く出た長さを測定して、下記表1にまとめた。
11:従来の接着フィルム
13:チップ(第2半導体素子)
15:基板(BGA基板)
17:コントローラ(第1半導体素子)
111:半導体用接着フィルム
Claims (9)
- 熱硬化性樹脂、熱可塑性樹脂、硬化剤、および非イオン性界面活性剤を含む半導体用接着剤組成物であって、
前記非イオン性界面活性剤は、ポリオキシエチレンアルキルエーテル、オレイン酸ジエタノールアミド、ポリソルベート、ポリエチレングリコール、ヒドロキシエチルセルロース、およびこれらの組み合わせからなる群より選択された1つであり、
前記非イオン性界面活性剤の含有量は、前記熱硬化性樹脂および熱可塑性樹脂の総含有量100重量部に対して0.1重量部~10重量部である、半導体用接着剤組成物。 - 前記熱可塑性樹脂は、エポキシ系官能基を有する(メタ)アクリレート系繰り返し単位を0.1重量%~30重量%含む(メタ)アクリレート系樹脂を含むものである、請求項1に記載の半導体用接着剤組成物。
- 前記熱硬化性樹脂は、20℃~25℃の温度下で1mPa・s~20,000mPa・sの粘度を有する液状エポキシ樹脂を含むものであり、
前記硬化剤は、60℃~150℃の軟化点を有するノボラック系フェノール樹脂を含むものである、請求項1に記載の半導体用接着剤組成物。 - 硬化触媒および無機充填材をさらに含むものである、請求項1に記載の半導体用接着剤組成物。
- 前記硬化触媒は、リン系化合物、ホウ素系化合物、リン-ホウ素系化合物、イミダゾール系化合物、およびこれらの組み合わせからなる群より選択された1つを含むものである、請求項4に記載の半導体用接着剤組成物。
- 前記無機充填材は、アルミナ、シリカ、硫酸バリウム、水酸化マグネシウム、炭酸マグネシウム、ケイ酸マグネシウム、酸化マグネシウム、ケイ酸カルシウム、炭酸カルシウム、酸化カルシウム、水酸化アルミニウム、窒化アルミニウム、ホウ酸アルミニウム、およびこれらの組み合わせからなる群より選択された1つを含むものである、請求項4に記載の半導体用接着剤組成物。
- 前記無機充填材は、シリカおよび炭酸マグネシウムを1:0.001~1:1の重量比で含むものである、請求項6に記載の半導体用接着剤組成物。
- 請求項1~請求項7のいずれか1項に記載の半導体用接着剤組成物の硬化物を含む半導体用接着フィルム。
- 前記硬化物の水に対する接触角が150度以下である、請求項8に記載の半導体用接着フィルム。
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