JP2007103428A - 電子部品および電子部品の製造方法 - Google Patents
電子部品および電子部品の製造方法 Download PDFInfo
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Abstract
【解決手段】電子部品100は、金属端子の最表面に金メッキが施された電気端子103と、アルミニウムワイヤ104とがワイヤボンディングにより電気的に接続されている。金メッキは、無電解Auメッキを施すことにより形成されている。この金メッキとアルミニウムワイヤ104との接合により生成される金属間化合物はAuAlあるいはAuAlとAuAl2である。また、無電解金メッキは、純度99.99%以上の金メッキである。
【選択図】図1−1
Description
まず、この発明の実施の形態にかかる電子部品の構成について説明する。図1−1は、この発明の実施の形態にかかる電子部品を示す断面図である。図1−1において、電子部品100は、パッケージ101と、半導体チップ102と、電気端子103と、アルミニウム合金(Al−1%Si)ワイヤ(以下、Alワイヤと記す)104と、により構成されている。また、パッケージ101の内部には、保護樹脂としてポッティングゲル105が満たされている。また、パッケージ101は、その一方の端部側に凹部106を有する。また、この実施の形態では、一例としてアルミニウム合金(Al−1%Si)ワイヤを用いて説明するが、アルミニウム合金(Al−1%Si)ワイヤのかわりにアルミニウムワイヤを用いることもできる。
建浴剤 :ディップ G200 建浴剤
酢酸タリウム、クエン酸(危険有害成分0.13%)
CAS No 563−68−8,866−84−2
還元剤 DMAB:ディップ G200 アディティブ
亜硫酸カリウム(危険有害成分0.2%)
錯化剤 :ディップ G200 補充液
酢酸タリウム、クエン酸(危険有害成分0.03%)
CAS No 563−68−8,866−84−2
建浴剤 :ゴブライト(登録商標) TSK−25−M2
アンモニウム塩 7%
オキシカルボン酸、アミノカルボン酸
還元剤 DMAB:ゴブライト(登録商標) TSK−25−A
亜硫酸塩[Na3Au(SO3)2]
水酸化カリウム(5%PH調整用)
錯化剤 :ゴブライト TSK−25−B
アミノカルボン酸塩 9.6%
101 パッケージ
102 半導体チップ
103 電気端子
103a 金属端子
104 アルミニウムワイヤ
105 ポッティングゲル
106 凹部
107 接合部
110 ニッケルメッキ
111 無電解金メッキ
Claims (5)
- 金属端子の最表面に金メッキが施された電気端子と、アルミニウムワイヤまたはアルミニウム合金ワイヤとがワイヤボンディングにより電気的に接続されている電子部品において、
前記金メッキは、無電解金メッキを施すことにより形成されており、前記金メッキと前記アルミニウムワイヤまたは前記アルミニウム合金ワイヤとの接合により、金とアルミニウムとにより生成される金属間化合物がAuAlあるいはAuAlとAuAl2とであることを特徴とする電子部品。 - 前記金メッキは、純度99.99%以上の金メッキであることを特徴とする請求項1に記載の電子部品。
- 金属端子の表面にニッケルメッキを施すニッケルメッキ工程と、
前記ニッケルメッキ工程によって前記ニッケルメッキが施された前記金属端子の表面に、無電解金メッキを施す無電解金メッキ工程と、
アルミニウムワイヤまたはアルミニウム合金ワイヤを前記金属端子にワイヤボンディングする工程と、
を含むことを特徴とする電子部品の製造方法。 - 前記無電解金メッキ工程は、前記ニッケルメッキ工程によって前記ニッケルメッキが施された前記金属端子の表面に置換型メッキを施す第1置換型メッキ工程と、
前記第1置換型メッキ工程によって前記第1置換型メッキが施された前記金属端子の表面に、別の置換型メッキを施す第2置換型メッキ工程と、
を含むことを特徴とする請求項3に記載の電子部品の製造方法。 - 前記第1置換型メッキ工程は、酢酸タリウムを主成分とする建浴剤と、酢酸タリウムを主成分とする錯化剤と、亜硫酸カリウムからなる還元剤と、を用いて行い、
前記第2置換型メッキ工程は、アンモニウム塩とカルボン酸を主成分とする建浴剤と、アンモニウム塩とカルボン酸を主成分とする錯化剤と、亜硫酸塩を主成分とする還元剤と、を用いて行うことを特徴とする請求項4に記載の電子部品の製造方法。
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Citations (7)
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JPH02132878A (ja) * | 1988-11-11 | 1990-05-22 | Seiko Instr Inc | 回路基板のボンディング金メッキ法 |
JPH06216184A (ja) * | 1992-08-20 | 1994-08-05 | Toyota Autom Loom Works Ltd | 配線基板上の配線の表面処理方法 |
JPH06330336A (ja) * | 1993-03-26 | 1994-11-29 | C Uyemura & Co Ltd | 無電解金めっき浴 |
JPH0936169A (ja) * | 1995-07-18 | 1997-02-07 | Toshiba Corp | 半導体素子および半導体装置 |
JPH09143749A (ja) * | 1995-11-17 | 1997-06-03 | Hitachi Chem Co Ltd | 無電解金めっき液 |
JP2001339140A (ja) * | 2000-05-26 | 2001-12-07 | Ngk Spark Plug Co Ltd | 配線基板及び配線基板の製造方法 |
JP2005183462A (ja) * | 2003-12-16 | 2005-07-07 | Kyocera Corp | 配線基板 |
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2005
- 2005-09-30 JP JP2005287801A patent/JP4984473B2/ja not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02132878A (ja) * | 1988-11-11 | 1990-05-22 | Seiko Instr Inc | 回路基板のボンディング金メッキ法 |
JPH06216184A (ja) * | 1992-08-20 | 1994-08-05 | Toyota Autom Loom Works Ltd | 配線基板上の配線の表面処理方法 |
JPH06330336A (ja) * | 1993-03-26 | 1994-11-29 | C Uyemura & Co Ltd | 無電解金めっき浴 |
JPH0936169A (ja) * | 1995-07-18 | 1997-02-07 | Toshiba Corp | 半導体素子および半導体装置 |
JPH09143749A (ja) * | 1995-11-17 | 1997-06-03 | Hitachi Chem Co Ltd | 無電解金めっき液 |
JP2001339140A (ja) * | 2000-05-26 | 2001-12-07 | Ngk Spark Plug Co Ltd | 配線基板及び配線基板の製造方法 |
JP2005183462A (ja) * | 2003-12-16 | 2005-07-07 | Kyocera Corp | 配線基板 |
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