JP2012004352A - 絶縁材、金属ベース基板および半導体モジュール並びにこれらの製造方法 - Google Patents
絶縁材、金属ベース基板および半導体モジュール並びにこれらの製造方法 Download PDFInfo
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Abstract
【解決手段】絶縁材は、エポキシ樹脂と、このエポキシ樹脂に分散された、1〜99nmの平均粒径を有する第1の無機フィラーと、0.1〜100μmの平均粒径を有する第2の無機フィラーとを含む。第1及び第2の無機フィラーは、互いに独立して、Al2O3、SiO2、BN、AlN及びSi3N4からなる群から選択される少なくとも1つであり、絶縁材における第1及び第2の無機フィラーの配合割合は、それぞれ、0.1〜7重量%及び80〜95重量%である。この絶縁層11の両面に、金属箔12と金属ベース13を形成し、金属ベース基板10とすることができる。
【選択図】図1
Description
11 絶縁層
12 金属箔
13 金属ベース
20 半導体モジュール
21 絶縁層
22
24 金属
26 回路素子
27 リードフレーム
28 ボンディングワイヤ
29 成形用樹脂
40 フルモールド半導体モジュール
46 パワー半導体素子
47 リードフレーム
48 ボンディングワイヤ
49 成形用樹脂
50 ヒートシンク
60 金属ベース基板
61 絶縁層
62 金属箔
63 金属ベース
Claims (12)
- エポキシ樹脂と、
前記エポキシ樹脂に分散されており、1〜99nmの平均粒径を有する第1の無機フィラーと、
前記エポキシ樹脂に分散されており、0.1〜100μmの平均粒径を有する第2の無機フィラーと、
を含む絶縁材であって、
前記第1及び第2の無機フィラーが、互いに独立して、Al2O3、SiO2、BN、AlN及びSi3N4からなる群から選択される少なくとも1つであり、
前記絶縁材における前記第1及び第2の無機フィラーの配合割合が、それぞれ、0.1〜7重量%及び80〜95重量%である絶縁材。 - 前記第1の無機フィラーの平均粒径が1〜50nmである請求項1に記載の絶縁材。
- 前記第2の無機フィラーの平均粒径が0.1〜50μmである請求項1に記載の絶縁材。
- 前記絶縁材の厚さが10〜500μmである請求項1に記載の絶縁材。
- 前記第1の無機フィラーの配合割合が3〜6重量%である請求項1に記載の絶縁材。
- 前記絶縁材が、4〜20W/m・Kの熱伝導率および少なくとも5kVの絶縁破壊電圧を有する請求項1に記載の絶縁材。
- 請求項1に記載の絶縁材の絶縁層と、金属ベース板と、金属箔とを含む金属ベース基板。
- 請求項7に記載の金属ベース基板と、
この金属ベース基板の前記金属箔の表面に実装された少なくとも1つの回路素子と
を含む半導体モジュール。 - 金属ブロックと、
前記金属ブロックの一方の表面に張り合わされた請求項1に記載の絶縁材の絶縁層と、
前記金属ブロックの他方の表面に実装された少なくとも1つの回路素子と
を含む半導体モジュール。 - エポキシ樹脂に、1〜99nmの平均粒径を有する第1の無機フィラーを添加するステップと、
前記第1の無機フィラーと前記エポキシ樹脂との混合物を、加圧してオリフィスを通過させて、前記第1の無機フィラーの凝集を防止するステップと、
前記オリフィスを通過させた混合物に、さらに0.1〜100μmの平均粒径を有する第2の無機フィラーを添加するステップと、
前記第1及び第2の無機フィラーと前記エポキシ樹脂との混合物を、成形して硬化するステップと
を含む絶縁材の製造方法。 - 前記第1及び第2の無機フィラーが、互いに独立して、Al2O3、SiO2、BN、AlN及びSi3N4からなる群から選択される少なくとも1つであり、
前記絶縁材における前記第1及び第2の無機フィラーの配合割合が、それぞれ、0.1〜7重量%及び80〜95重量%である請求項10に記載の方法。 - 金属ブロックの一方の表面に、請求項1に記載の絶縁材を、絶縁層として張り合わせるステップと、
前記金属ブロックの他方の表面に、少なくとも1つの回路素子を実装するステップと
を含む半導体モジュールの製造方法。
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