JP7266826B2 - 非導電性フィルムおよび半導体積層体の製造方法 - Google Patents
非導電性フィルムおよび半導体積層体の製造方法 Download PDFInfo
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Description
また、本発明の目的は、前記非導電性フィルムを利用した半導体積層体の製造方法を提供することにある。
また、前記粘着層は、多官能(メト)アクリレート化合物をさらに含むことができる。
前記硬化剤としては、ノボラック系フェノール樹脂が好ましく適用され得る。
製造例1-1
2-エチルヘキシルアクリレート(2-EHA)97.5g、4-ヒドロキシブチルアクリレート(4-HBA)2.5g、重合開始剤としてはベンゾイルペルオキシド0.1g、メチルエチルケトン(MEK)170gを使用して(メト)アクリレート樹脂270gを製造した。
2-エチルヘキシルアクリレート(2-EHA)97g、2-ヒドロキシエチルアクリレート(2-HEA)3g、ベンゾイルペルオキシド0.1g、メチルエチルケトン(MEK)170gを使用して(メト)アクリレート樹脂270gを製造した。
2-エチルヘキシルアクリレート(2-EHA)93g、2-ヒドロキシエチルアクリレート(2-HEA)1g、4-ヒドロキシブチルアクリレート(4-HBA)6g、重合開始剤としてはベンゾイルペルオキシド0.1g、メチルエチルケトン(MEK)170gを使用して(メト)アクリレート樹脂270gを製造した。
2-エチルヘキシルアクリレート(2-EHA)99g、2-ヒドロキシプロピルアクリレート(2-HPA)1g、重合開始剤としてはベンゾイルペルオキシド0.1g、メチルエチルケトン(MEK)170gを使用して(メト)アクリレート樹脂270gを製造した。
低分子量エポキシ樹脂としてビスフェノールF型エポキシ樹脂(KDS-8170、国都化学社製、分子量340g/mol)50g、エポキシ樹脂としてビフェニルノボラックエポキシ樹脂(NC-3000H、日本化薬社製、エポキシ当量:288g/eq、軟化点:70)40g、フェノール樹脂KPH-F3075(コーロン油化社製、水酸基当量:175g/eq、軟化点75)70g、熱可塑性アクリレート樹脂KG-3015(NEGAMI社製)40g、触媒として2-フェニル-4-メチル-5-ジヒドロキシメチルイミダゾール(2P4MHZ、四国化成社製)0.5g、および充填剤SC1050(球状シリカ、平均粒径0.3μm)70gをメチルエチルケトンに溶解して接着層組成物(固形分35重量%濃度)を得た。
前記の接着層を重ねて320μmになる時までラミネートした後、Anton Parr社のMCR302を利用して10Hzの剪断速度および10℃/分の昇温速度を適用して測定値の最小値を溶融粘度と判断した。
(1)粘着層組成物の製造
前記製造例1-1で製造された(メト)アクリレート樹脂100g、架橋剤としてMHG-80B(asaikasei)2.5g(前記(メト)アクリレート樹脂固形分に対する架橋剤含有量が5wt%)および1.1mgのDBTDLを混合して粘着層組成物を製造した。
前記粘着層組成物を離型PETに塗布し、110℃温度のオーブンで3分間放置して厚さが20μmである粘着層を形成した後、前記製造例2で製造した接着層の上部と合紙して接着層および粘着層を含む非導電性フィルムを製造した。
下記表1に使用された成分を組み合わせて粘着層組成物を製造することを除き、実施例1と同様な方法で非導電性フィルムを製造した。
前記実施例および比較例で製造した非導電性フィルムに対して下記の方法で物性を評価し、その結果を下記表1に示した。
粘着層と接着層の間の剥離力測定のために、前記実施例1乃至2および比較例1乃至5で製造した非導電性フィルムを常温で1時間放置し、その後、幅25mmのサンプルを製作して常温での剥離力を測定した。180度の剥離角度および300mm/minの剥離速度で引張試験器(Texture Analyzer)を利用して測定した。
剥離力はそれぞれのサンプルに対して3回以上測定し、その平均値を求めた。
前記製造例2で製造した接着層に対して示差熱分析器(DSC)を利用して硬化温度で面積により接着層の初期発熱量を測定した。
下記一般式1を利用して変化率を計算した。
変化率(%)=[(初期接着層のpeak面積-60℃で24時間放置後のpeak面積)/初期接着層のpeak面積]x100
Scanning Acousitic Tomography(SAT)を通じてバンプチップの間にボイドが占める面積が1%以下になるものを合格(O)、そして1%を超えるものを不合格(X)と評価した。
Claims (11)
- 低分子量エポキシ樹脂を含む接着層;および粘着層;を含み、
前記粘着層は、ヒドロキシル基含有アクリレート単量体またはオリゴマーに由来する繰り返し単位を2乃至6重量%およびペンチル(メト)アクリレート、n-ブチル(メト)アクリレート、ヘキシル(メト)アクリレート、n-オクチル(メト)アクリレート、イソオクチル(メト)アクリレート、2-エチルヘキシル(メト)アクリレート、ドデシル(メト)アクリレートまたはデシル(メト)アクリレートからなる群より選択された1種以上の単量体またはオリゴマーに由来する繰り返し単位を94乃至98重量%含む(メト)アクリレート樹脂;およびイソシアネート系化合物を前記(メト)アクリレート樹脂に対して3乃至9重量%含む架橋剤;を含む、
非導電性フィルム。 - 前記非導電性フィルムは、シリコン貫通電極(TSV)を利用した半導体生産工程に使用される、
請求項1に記載の非導電性フィルム。 - 前記低分子量エポキシ樹脂は、150乃至450の重量平均分子量を有する、請求項1または2に記載の非導電性フィルム。
- 前記ヒドロキシル基含有アクリレート単量体は、2-ヒドロキシエチル(メト)アクリレート、2-ヒドロキシプロピル(メト)アクリレート、4-ヒドロキシブチル(メト)アクリレート、6-ヒドロキシヘキシル(メト)アクリレート、および8-ヒドロキシオクチル(メト)アクリレートからなる群より選択された1種以上を含む、請求項1から3のいずれか一項に記載の非導電性フィルム。
- 前記イソシアネート系化合物は、トリレンジイソシアネート、キシレンジイソシアネート、ジフェニルメタンジイソシアネート、ヘキサメチレンジイソシアネート、イソフォルムジイソシアネート、テトラメチルキシレンジイソシアネートおよびナフタレンジイソシアネートからなる群より選択された1種以上を含む、請求項1から4のいずれか一項に記載の非導電性フィルム。
- 前記粘着層の厚さは、5乃至50μmである、請求項1から5のいずれか一項に記載の非導電性フィルム。
- 前記接着層の厚さは、5乃至40μmである、請求項1から6のいずれか一項に記載の非導電性フィルム。
- 180度の剥離角度および300mm/minの剥離速度で測定した前記粘着層の接着層に対する剥離力が10g/25mm乃至60g/25mmである、請求項1から7のいずれか一項に記載の非導電性フィルム。
- 10Hzの剪断速度および10℃/分の昇温速度を適用して測定した前記接着層の溶融粘度が100Pa・s乃至10,000Pa・sである、請求項1から8のいずれか一項に記載の非導電性フィルム。
- 離型PET、前記離型PET上に積層された前記粘着層、前記粘着層上に積層された前記接着層を含む、請求項1から9のいずれか一項に記載の非導電性フィルム。
- 導電性バンプを有する基板または貫通電極を含む半導体チップ上に請求項1から10のいずれか一項に規定の非導電性フィルムを積層する段階を含む、半導体積層体の製造方法。
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