JP4842812B2 - 半導体装置用基板の製造方法 - Google Patents
半導体装置用基板の製造方法 Download PDFInfo
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- JP4842812B2 JP4842812B2 JP2006519633A JP2006519633A JP4842812B2 JP 4842812 B2 JP4842812 B2 JP 4842812B2 JP 2006519633 A JP2006519633 A JP 2006519633A JP 2006519633 A JP2006519633 A JP 2006519633A JP 4842812 B2 JP4842812 B2 JP 4842812B2
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- Prior art keywords
- semiconductor device
- metal foil
- conductive portion
- adhesive
- layer
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Description
[特許文献1]特開平9−252014号公報
[特許文献2]特開2001−210743号公報
[図2]図2は、図1の半導体装置における導電部の拡大図である。
[図3]図3は、本発明に係る半導体装置の別の例を示す概略構成図である。
[図4]図4は、本発明に係る半導体装置のさらに別の例を示す概略構成図である。
[図5]図5は、図4の半導体装置における導電部の拡大図である。
[図6]図6(a)−(d)は、図1に示した半導体装置の製造方法を示す工程図である。
[図7]図7は、図6の工程にて導電部を形成した時点での接着シート(基板)の平面図を模式的に示した説明例である。
[図8]図8(a)−(e)は、基板作成の手順を示す工程図である。
[図9]図9(a)(b)は、導電部における金属箔の側面を粗面化する様子を示す説明図である。
[図10]図10(a)(b)は、本発明の半導体装置の製造方法における基板作成工程で接着シートに導電部形成した状態の上面図である。
[図11]図11(a)(b)は、リードレス構造をした従来の半導体装置の一例を示す説明図である。
[図12]図12(a)(b)は、リードレス構造をした従来の半導体装置の別の例を示す説明図である。
図1および図2に示すように、半導体装置Pは電極11を有する半導体素子10と、半導体素子10の周囲に配置された複数の導電部20と、半導体素子10の電極11と導電部20とを電気的に接続するワイヤー30と、半導体素子10、導電部20およびワイヤー30を封止する封止樹脂40と備えている。
ビスフェノールA型エポキシ樹脂(ジャパンエポキシレジン社製「エビコート1002」)100重量部、アクリロニトリルブタジエン共重合体(日本ゼオン社製「ニッポール1072J」)35重量部、フェノール樹脂(荒川化学社製「P−180」)4重量部、イミダゾール(四国ファイン社製「C11Z」)2重量部を、メチルエチルケトン350重量部に溶解し、接着剤溶液を得た。これを厚さ100μmの片面粗化銅合金箔(ジャパンエナジー社製「BHY−13B−7025」)51に塗布した後、150℃で3分間乾燥させることにより、厚さ15μmの接着剤層を形成した接着シート50を得た。この接着シート50における接着剤層52の硬化前の100℃での弾性率は2.5×10−3Paであり、硬化後の200℃での弾性率は4.3MPaであり、銅箔に対する接着力は12N/20mmであった。なお、基材層51として用いた銅箔の200℃での弾性率は130GPaであった。
まず、厚さ40μmの銅箔(「Olin7025」)60の両面にドライフィルムレジスト61(東京応化製「オーディルAR330」)をラミネートした。そして、そのドライフィルムレジストをフォトリソグラフィー法により導電部とは逆のパターンでパターニングした。次いで、パターニングされたドライフィルムレジストをマスクとして、銅箔の両面にニッケルめっきとAuめっきを順次施して導電部めっき層62を形成し、その後、ドライフィルムレジストを除去した。続いて、ニッケルめっき層とAuめっき層の積層物が部分的に配された銅箔60を接着シート50に接着剤層52側を介して貼り付けた。この時、接着シート50に対向する側のめっき積層物が接着剤層に埋まった状態になるように加圧しながら貼り付けた。そして、めっき部62と接着剤層52間に隙間ができないよう十分に加熱加圧した。次いで、この貼り付け状態で、Auめっき層をレジストとして銅箔をエッチングし導電部60を形成した。このエッチング加工に際して、銅箔60の側面をもエッチングすることにより、銅箔の上下にAuとニッケルからなる張出部分20aを設けた。続いて、(硫酸+過酸化水素)系の薬液に浸漬し、銅箔60の側面60aを処理してRa(表面粗さ)が0.2μm以上となるように制御して粗面化した。最後に、プレス加工により接着シートの外形を加工した。
試験用のアルミ蒸着シリコンチップ(6mm×6mm)10を、前記接着シート50の接着剤層52面(図10(b)の71に相当)へ固着した。具体的には、175℃、0.3MPa、1秒間の条件で貼り付けた後、150℃で1時間、乾燥させて固着した。次いで、直径25μmの金ワイヤーを用いて、シリコンチップの電極と導電部との間をボンディングした。ワイヤーボンド数は1個のチップ当たり64点である。
装置:株式会社新川製「UTC−300BI SUPER」
超音波周波数:115KHz
超音波出力時間:15ミリ秒
超音波出力:120mW
ボンド荷重:1018N
サーチ荷重:1037N
〔トランスファーモールド条件〕
装置:TOWA成形機
成形温度:175℃
時間:90秒
クランプ圧力:200KN
トランスファースピード:3mm/秒
トランスファー圧:5KN
〔弾性率測定方法〕
基材層、接着剤層のいずれも
評価機器:レオメトリックス社製の粘弾性スペクトルメータ「ARES」
昇温速度:5℃/min
周波数:1Hz
測定モード:引張モード
〔接着力測定方法〕
幅20mm、長さ50mmの接着シート50を、120℃×0.5MPa×0.5m/minの条件で、35μm銅箔(ジャパンエナジー製「C7025」)にラミネートした後、150℃の熱風オーブンにて1時間放置後、温度23℃、湿度65%RHの雰囲気条件で、引張り速度300mm/min、180°方向に35μm銅箔を引張り、その中心値を接着強度とした。
ワイヤーボンドのプル強度を、株式会社レスカ製のボンディングテスタ「PTR−30」を用い、測定モード:プルテスト、測定スピード:0.5mm/secで測定した。プル強度が0.04N以上の場合を成功、0.04Nより小さい場合を失敗とした。ワイヤーボンド成功率は、これらの測定結果から成功の割合を算出した値である。
Claims (2)
- 導電部の素材として銅又は銅合金からなる金属箔を準備する工程と、
金属箔の両面の導電部に対応する部分に部分めっきを施して部分めっき層を形成する工程と、
部分めっき層が形成された金属箔を、基材層及び半導体素子が固着される半導体素子固着領域を含む接着剤層を有する接着シートの接着剤層側に部分めっき層が半導体素子固着領域の周囲に位置するよう加圧して、金属箔の接着シート側の面に設けられた部分めっき層が接着剤層に埋まった状態で貼り付ける工程と、
部分めっき層をレジストとして金属箔をエッチングすることにより導電部を形成する工程と、
接着シートを加工して外形を定める工程とを備えたことを特徴とする半導体装置製造用基板の製造方法。 - 部分めっき層をレジストとして金属箔をエッチングし導電部を形成させる工程で、導電部の金属箔の側面をエッチングにより粗化したことを特徴とする請求項1記載の半導体装置製造用基板の製造方法。
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US7671452B1 (en) * | 2007-08-17 | 2010-03-02 | National Semiconductor Corporation | Microarray package with plated contact pedestals |
JP5338543B2 (ja) * | 2009-07-27 | 2013-11-13 | 日亜化学工業株式会社 | 光半導体装置及びその製造方法 |
CN102110727A (zh) * | 2009-11-20 | 2011-06-29 | 日立电线株式会社 | 太阳电池模块,以及太阳电池模块用布线电路板 |
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JP5948881B2 (ja) * | 2012-01-16 | 2016-07-06 | 大日本印刷株式会社 | 半導体装置用リードフレーム |
JP6099369B2 (ja) * | 2012-11-20 | 2017-03-22 | Shマテリアル株式会社 | 半導体素子搭載用基板及びその製造方法 |
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JP6777365B2 (ja) * | 2016-12-09 | 2020-10-28 | 大口マテリアル株式会社 | リードフレーム |
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- 2005-07-13 WO PCT/JP2005/012907 patent/WO2006009030A1/ja active Application Filing
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TWI364079B (ja) | 2012-05-11 |
CN1989611A (zh) | 2007-06-27 |
WO2006009030A1 (ja) | 2006-01-26 |
DE112005001661T5 (de) | 2007-05-31 |
CN100555608C (zh) | 2009-10-28 |
US20080048311A1 (en) | 2008-02-28 |
JPWO2006009030A1 (ja) | 2008-05-01 |
TW200610073A (en) | 2006-03-16 |
US7943427B2 (en) | 2011-05-17 |
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