JP2011176278A - アンダーフィル用途のためのエポキシ樹脂配合物 - Google Patents
アンダーフィル用途のためのエポキシ樹脂配合物 Download PDFInfo
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- JP2011176278A JP2011176278A JP2010259972A JP2010259972A JP2011176278A JP 2011176278 A JP2011176278 A JP 2011176278A JP 2010259972 A JP2010259972 A JP 2010259972A JP 2010259972 A JP2010259972 A JP 2010259972A JP 2011176278 A JP2011176278 A JP 2011176278A
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Abstract
【解決手段】電子部品はハンダジョイント15(電子部品14上のハンダバンプと基体12上のボンディングパッドとから形成される)を介して基体12に電気的に接続されており、このハンダジョイント15は、電子部品14と基体12との間に配置された硬化したアンダーフィル組成物11を有し、硬化したアンダーフィル組成物11はジビニルベンゼンジオキシドを配合物中の成分として含み、キャピラリーアンダーフィル組成物の製造に有用な、低粘度で、ほとんど〜全く塩化物を含まないエポキシ樹脂配合物。
【選択図】図1
Description
本発明は、電子部品および基体の一方が複数のハンダバンプを有し、かつ他方が複数の電気ボンディングパッドを有する、電子部品および基体を提供し;電子部品と基体とを電気的に接続し;電子部品と基体との間にアンダーフィル組成物を形成し;アンダーフィル組成物を硬化させる;ことを含み、前記アンダーフィル組成物がジビニルアレーンジエポキシドを含む;電気アセンブリを製造する方法を提供する。ジビニルベンゼンジオキシド樹脂のようなジビニルアレーンジオキシド樹脂の使用は高充填添加量、高Tg値およびこの樹脂によってもたらされる非常に低い〜ゼロの全塩化物汚染を可能にする。さらに、ジビニルアレーンジオキシド樹脂は、従来の低粘度環式脂肪族エポキシ樹脂とな異なり、多くの様々な硬化剤が使用されるのを可能にする。電子部品と基体との間の硬化されたアンダーフィルの存在ははんだ接合を強化し、熱サイクリング中のはんだ接合欠陥を低減させるのを助ける。
また、ジビニルアレーンジエポキシドの反応生成物を含むアンダーフィル組成物を電子部品と基体との間に伴って、基体に電気的に接続された電子部品を含む電子アセンブリが提供される。
別の実施形態においては、本発明は、ジビニルアレーンジエポキシド、硬化剤およびフィラーを含み、フィラーが組成物の全体積を基準にして1〜70体積%の量で存在する場合に、25℃で0.005〜100Pa・sの粘度を有するアンダーフィル組成物を提供する。
本発明の別の実施形態は上記エポキシ樹脂配合物を製造する方法に関する。
鍵となる目的の特性に対するフィラー添加量および樹脂の影響について検討するために、一組の実験が構築された。比較例AおよびB、並びに実施例1〜3は以下の手順に従って製造された:
各組成物の成分が蓋付きの75ミリリットル(mL)ポリプロピレンプラスチックジャーに入れられ、フラックテック(FlackTek)によるスピードミキサー(SpeedMixer(登録商標))DAC150を用いて、分あたり3200回転(rpm)で120秒間ブレンドされた。フィラー添加量レベルは固形分基準で、35重量%、50重量%、および65重量%であった。実験デザインは可変物として樹脂タイプも含んでおり、D.E.R.商標354(平均エポキシ当量重量(EEW)174g/molのビスフェノールFベースのエポキシ樹脂;ザダウケミカルカンパニーから入手可能)およびジビニルベンゼンジオキシド(DVBDO)を使用した。芳香族アミン硬化剤あるジエチルトルエンジアミン(DETDA)と1:1の化学量論バランスを維持しつつ、2種類の樹脂を1:1の重量比で一緒にした中心点が含まれていた。
表IIIに記載される実施例4〜10の配合物は、以下の手順に従ってスピードミキサー(SpeedMixer(登録商標))DAC150(フラックテック(FlackTek)、ランドラム、サウスカロライナ州)を用いてブレンドされた。
硬化後のサンプルのTgを決定するために、TAインスツルメンツ2920デュアルセルDSCが使用された。この手順は25℃から300℃まで、10℃/分の勾配割合での単一の勾配で、50mL/分の窒素パージを伴うことからなっていた。このTgはTAインスツルメンツユニバーサルアナリシスソフトウェアにおける外そうタンジェント方法を用いて決定された。小片(約15mg)が各硬化サンプルから切り出され、上述の方法に従って分析された。
11 アンダーフィル組成物
12 基体
13 ハンダボール
14 電子部品
15 ハンダジョイント
Claims (10)
- 電子部品および基体の一方が複数のハンダバンプを有し、かつ他方が複数の電気ボンディングパッドを有する、電子部品および基体を提供し;電子部品と基体とを電気的に接続し;電子部品と基体との間にアンダーフィル組成物を形成し;アンダーフィル組成物を硬化させる;ことを含み、
前記アンダーフィル組成物がジビニルアレーンジエポキシドを含む;
電気アセンブリを製造する方法。 - ジビニルアレーンジオキシドがジビニルベンゼンジオキシドである、請求項1に記載の方法。
- アンダーフィル組成物が硬化剤をさらに含む、請求項1に記載の方法。
- アンダーフィル組成物がフィラーを85体積%以下の量でさらに含む、請求項1に記載の方法。
- フィラーが50〜70重量%の量で存在し、かつアンダーフィル組成物が25℃で0.05〜1Pa・sの粘度を有する、請求項4に記載の方法。
- 硬化させる工程が、アンダーフィル組成物を75〜100℃の第1の温度で2〜90分間加熱し、次いでアンダーフィル組成物を125〜200℃の第2の温度で2〜180分間加熱することを含む、請求項1に記載の方法。
- ジビニルアレーンジエポキシドの反応生成物を含むアンダーフィル組成物を、電子部品と基体との間に伴って、基体に電気的に接続された電子部品を含む電子アセンブリ。
- アンダーフィル組成物がフィラーをさらに含む、請求項7に記載の電子アセンブリ。
- ジビニルアレーンジエポキシド、硬化剤およびフィラーを含む組成物であって、フィラーが組成物の全体積を基準にして1〜70体積%の量で存在する場合に、25℃で0.005〜100Pa・sの粘度を有する組成物。
- ジビニルアレーンジエポキシドがジビニルベンゼンジオキシドである、請求項9に記載の組成物。
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