JP2008153470A - 半導体装置および半導体装置の製造方法 - Google Patents
半導体装置および半導体装置の製造方法 Download PDFInfo
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- JP2008153470A JP2008153470A JP2006340473A JP2006340473A JP2008153470A JP 2008153470 A JP2008153470 A JP 2008153470A JP 2006340473 A JP2006340473 A JP 2006340473A JP 2006340473 A JP2006340473 A JP 2006340473A JP 2008153470 A JP2008153470 A JP 2008153470A
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- semiconductor device
- electrode
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Abstract
【解決手段】少なくとも一方の主面に金属電極12を備える半導体デバイスと、ベース樹脂(有機樹脂)10に貴金属を含むAg粒子(金属粒子)9を混合した導電性樹脂7を介して、金属電極12に電気的に接続されるダイパッド(金属部材)13とを有し、金属電極12またはダイパッド13の互いに対向する面の少なくとも一方の面に、金属面にAg(貴金属)のナノ粒子を焼結したポーラスなナノ粒子コート膜(貴金属層)5が形成されるように構成する。
【選択図】図6
Description
図1は、本実施の形態1の半導体デバイスが配線基板にフリップチップ接続された状態を示す断面図である。
前記実施の形態1では半導体デバイスを配線基板にフリップチップ接続した半導体装置に適用した例について説明した。本実施の形態2では、ダイボンディングにより半導体デバイスの主面に形成された電極を接続する半導体装置に適用した例について説明する。
前記実施の形態2では半導体デバイスの電極表面にナノ粒子コート膜を形成した例について説明した。本実施の形態3では、ダイパッドの半導体デバイス搭載領域にナノ粒子コート膜を形成する例について説明する。図9は、本実施の形態3による半導体デバイスのダイボンディング構造を示す断面図である。
本実施の形態4では、縦型半導体デバイスの裏面電極と反対側の主面に形成された電極をリードで接続するタイプの半導体装置に適用する例について説明する。図11は、本実施の形態4の導電性樹脂接着タイプの縦型半導体装置を示す平面図、図12は図11に示すB−B線に沿った断面図、図13は図12に示す一点鎖線Dで囲った領域の導電性樹脂で接着する前の状態を示す拡大断面図である。
本実施の形態5では、ナノ粒子コート膜を前記実施の形態1〜4とは異なる状態で形成した例について説明する。図14は、半導体デバイスの裏面電極表面の複数の領域にAgナノ粒子コート膜が点在する状態で形成された半導体装置を示す平面図、図15は図14に示すC−C線に沿った断面図である。
1a 主面(第1主面)
2 電極端子(金属電極、第1電極)
3 配線基板
4 接続端子(金属部材、第1金属部材)
5 ナノ粒子コート膜(貴金属層、第1貴金属層)
6 ナノ粒子コート膜(第2貴金属層)
7 導電性樹脂
8 アンダーフィル樹脂
9 Ag粒子(金属粒子)
10 ベース樹脂
11 半導体デバイス
11a 主面(第1主面)
11b 主面(第2主面)
12 金属電極(第1電極)
13 ダイパッド(第2金属部材)
14 Agめっき膜
15 ナノ粒子コート膜(第2貴金属層)
16 ダイパッド
17 ナノ粒子コート膜(第3貴金属層)
18 ナノ粒子層(貴金属層)
19 導電粒子
20 導電性樹脂
22 ソース電極
23 ゲート電極
25 ドレインリード
26 ソースリード
27 ゲートリード
28、29 ワイヤ
30 モールド樹脂
32 Agめっき膜
33 めっき膜
34、35 Cuリード
36、37 面取り加工部
38 パッシベーション膜
51 方向(第1の方向)
52 方向(第2の方向)
53 方向(第3の方向)
100 孔部
101A 第1の開口部
101B 第2の開口部
101C 第3の開口部
101D 第4の開口部
101E 第5の開口部
101F 第6の開口部
102 迫り出し部
Claims (12)
- 少なくとも一方の主面に金属電極を備える半導体デバイスと、
有機樹脂に貴金属を含む金属粒子を混合した導電性樹脂を介して、前記金属電極に電気的に接続される金属部材とを有し、
前記金属電極または前記金属部材の互いに対向する面の少なくとも一方の面には、貴金属のナノ粒子を焼結したポーラスな貴金属層が形成されていることを特徴とする半導体装置。 - 互いに反対側に位置する第1主面および第2主面を有する半導体デバイスと、
有機樹脂に貴金属を含む金属粒子を65〜98wt%混合した導電性樹脂を介して、前記第1主面に形成された第1電極に電気的に接続される第1金属部材と、
前記第1電極の前記第1金属部材と対向する面に融着して形成された第1貴金属層と、
前記半導体デバイスを封止する絶縁性の封止体とを有し、
前記第1電極の前記第1金属部材と対向する面は貴金属で構成され、
前記第1貴金属層の厚さは50nm〜3μmであり、
前記第1貴金属層の表面は、複数の孔部を備え、
前記孔部は、
前記第1電極から前記第1金属部材に向かう第1の方向に沿って、順に第1の開口部と第2の開口部を備え、
前記第2の開口部に、前記第1の開口部を覆う前記第1貴金属層を構成する貴金属からなる迫り出し部が形成されていることを特徴とする半導体装置。 - 請求項2に記載された半導体装置において、
前記第1金属部材の前記第1電極と対向する面の前記半導体デバイスを搭載する領域には、前記第1金属部材に融着して形成された第2貴金属層が形成されており、
前記第2貴金属層の厚さは50nm〜3μmであり、
前記第2貴金属層の表面は、複数の孔部を備え、
前記第1金属部材から前記第1電極に向かう第2の方向に沿って、順に第3の開口部と第4の開口部を備え、
前記第4の開口部に、前記第3の開口部を覆う前記第2貴金属層を構成する貴金属からなる迫り出し部が形成されていることを特徴とする半導体装置。 - 請求項2に記載された半導体装置において、
前記第1金属部材はCuまたはCuを含む合金で構成され、
前記第1電極の前記第1金属部材と対向する面はAuまたはAgで構成され、
前記第1貴金属層は、Agで構成されていることを特徴とする半導体装置。 - 請求項2に記載された半導体装置において、
前記第1貴金属層は、
前記第1電極の前記第1金属部材と対向する面上の複数の領域に点在する状態で形成されていることを特徴とする半導体装置。 - 請求項2に記載された半導体装置において、
前記第1金属部材の前記第1電極と対向する面の前記半導体デバイスを搭載する領域は貴金属がめっき形成されていることを特徴とする半導体装置。 - 請求項2に記載された半導体装置において、
前記第2主面に形成された第2電極と電気的に接続される第2金属部材と、
前記第2電極の前記第2金属部材と対向する面に融着して形成された第3貴金属層とを有し、
前記第2電極の前記第2金属部材と対向する面は貴金属で構成され、
前記第3貴金属層の厚さは50nm〜3μmであり、
前記第3貴金属層の表面は、複数の孔部を備え、
前記第2電極から前記第2金属部材に向かう第3の方向に沿って、順に第5の開口部と第6の開口部を備え、
前記第6の開口部に、前記第5の開口部を覆う前記第3貴金属層を構成する貴金属からなる迫り出し部が形成されていることを特徴とする半導体装置。 - 請求項7に記載された半導体装置において、
前記第1金属部材および前記第2金属部材はCuまたはCuを含む合金で構成され、
前記第1電極の前記第1金属部材に対向する面および前記第2電極の前記第2金属部材に対向する面はAuまたはAgで構成され、
前記第1貴金属層および前記第3貴金属層は、Agで構成されていることを特徴とする半導体装置。 - 請求項7に記載された半導体装置において、
前記第1貴金属層は、
前記第1電極の前記第1金属部材に対向する面にある複数の領域に点在する状態で形成されており、
前記第3貴金属層は、
前記第2電極の前記第2金属部材に対向する面にある複数の領域に点在する状態で形成されていることを特徴とする半導体装置。 - 請求項7に記載された半導体装置において、
前記第1金属部材の前記第1電極と対向する面の前記半導体デバイスを搭載する領域には、前記第1金属部材に融着して形成された第2貴金属層が形成されており、
前記第2貴金属層の厚さは50nm〜3μmであり、
前記第2貴金属層の表面は、複数の孔部を備え、
前記第1金属部材から前記第1電極に向かう第2の方向に沿って、順に第3の開口部と第4の開口部を備え、
前記第4の開口部に、前記第3の開口部を覆う前記第2貴金属層を構成する貴金属からなる迫り出し部が形成されていることを特徴とする半導体装置。 - 請求項7に記載された半導体装置において、
前記第1金属部材の前記第1電極と対向する面の前記半導体デバイスを搭載する領域は貴金属がめっき形成されていることを特徴とする半導体装置。 - 半導体デバイスの主面に形成された電極の表面に、平均粒子径が1〜50nmである貴金属ナノ粒子を分散させたペースト、または溶媒を塗布する工程と、
前記ペースト、または前記溶媒を塗布した前記電極を、200〜500℃の範囲の加熱温度で焼結する工程と、
前記電極に電気的に接続される金属部材を準備し、前記金属部材の前記電極と接続される面に、有機樹脂に平均粒子径が0.5〜40μmの貴金属粒子が65〜98wt%混合された導電性樹脂を塗布する工程と、
前記導電性樹脂に前記半導体デバイスを押し付けて搭載する工程と、
前記導電性樹脂を加熱硬化させる工程とを有していることを特徴とする半導体装置の製造方法。
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