JP2010153825A - リードフレーム及びその製造方法、及び半導体装置 - Google Patents
リードフレーム及びその製造方法、及び半導体装置 Download PDFInfo
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- JP2010153825A JP2010153825A JP2009263194A JP2009263194A JP2010153825A JP 2010153825 A JP2010153825 A JP 2010153825A JP 2009263194 A JP2009263194 A JP 2009263194A JP 2009263194 A JP2009263194 A JP 2009263194A JP 2010153825 A JP2010153825 A JP 2010153825A
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- Prior art keywords
- lead frame
- film
- plating
- plating film
- semiconductor chip
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- ISDDBQLTUUCGCZ-UHFFFAOYSA-N dipotassium dicyanide Chemical compound [K+].[K+].N#[C-].N#[C-] ISDDBQLTUUCGCZ-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】半導体チップ12が接着されるダイパッド24、及びダイパッド24の周囲に複数配置されたリード25を有すると共に、Cu又はCuを含んだ合金により構成されたリードフレーム本体21と、リードフレーム本体21に設けられ、半導体チップ12の電極パッド36と接続された金属ワイヤ15と接続される金属膜と、を有し、該金属膜としてAg結晶粒31の結晶粒間33にナノ粒子である炭素粒子34が配置されたAgめっき膜22を設けた。
【選択図】図3
Description
前記リードフレーム本体に設けられ、前記半導体チップの電極パッドと接続された金属ワイヤと接続される金属膜と、を有し、
前記金属膜は、Ag結晶粒の結晶粒間にナノ粒子が配置されたAgめっき膜であることを特徴とするリードフレームが提供される。
前記リードフレーム本体に設けられたCu膜と、
前記Cu膜上に設けられ、前記半導体チップの電極パッドと接続された金属ワイヤと接続される金属膜と、を有し、
前記金属膜は、Ag結晶粒の結晶粒間にナノ粒子が配置されたAgめっき膜であることを特徴とするリードフレームが提供される。
粒子径が0.01μm〜0.5μmとされたナノ粒子が分散されたAgめっき液を用いた電解めっき法により、前記金属膜の形成領域に対応する部分の前記リードフレーム本体に、前記金属膜として前記ナノ粒子を含んだAgめっき膜を形成することを特徴とするリードフレームの製造方法が提供される。
前記金属膜の形成領域に対応する部分の前記リードフレーム本体に、めっき法により前記Cu膜を形成するCu膜形成工程と、
粒子径が0.01μm〜0.5μmとされたナノ粒子が分散されたAgめっき液を用いた電解めっき法により、前記Cu膜上に、前記金属膜として、前記ナノ粒子を含んだAgめっき膜を形成するAgめっき膜形成工程と、を含むことを特徴とするリードフレームの製造方法が提供される。
図3は、本発明の第1の実施の形態に係る半導体装置の断面図である。
図17は、本発明の第2の実施の形態に係る半導体装置の断面図である。図17において、第1の実施の形態の半導体装置10と同一構成部分には同一符号を付す。
図18は、本発明の第3の実施の形態に係る半導体装置の断面図である。図18において、第1の実施の形態の半導体装置10と同一構成部分には同一符号を付す。
11,81,101,111 リードフレーム
12,103 半導体チップ
13 モールド樹脂
15,105 金属ワイヤ
16 接着材
21,83 リードフレーム本体
22 Agめっき膜
24,86 ダイパッド
24A,86A チップ接着面
24B,48A 面
25,87 リード
27,91 インナーリード部
22A,27A,84A,91A 上面
28,92 アウターリード部
31 Ag結晶粒
33 結晶粒間
34 炭素粒子
36,107 電極パッド
45 板材
47 めっき装置
48 ステージ部
49 めっき液供給部
51 めっき液供給用ケース
53 第1のめっき用マスク
53A 下面
54 第2のめっき用マスク
56 めっき液収容部
58 開口部
62 Agめっき液
65 ヒーターブロック
84 Cu膜
A 厚さ
Claims (9)
- 半導体チップが接着されるダイパッド、及び前記ダイパッドの周囲に複数配置されたリードを有すると共に、Cu又はCuを含んだ合金により構成されたリードフレーム本体と、
前記リードフレーム本体に設けられ、前記半導体チップの電極パッドと接続された金属ワイヤと接続される金属膜と、を有し、
前記金属膜は、Ag結晶粒の結晶粒間にナノ粒子が配置されたAgめっき膜であることを特徴とするリードフレーム。 - 半導体チップが接着されるダイパッド、及び前記ダイパッドの周囲に複数配置されたリードを有するリードフレーム本体と、
前記リードフレーム本体に設けられたCu膜と、
前記Cu膜上に設けられ、前記半導体チップの電極パッドと接続された金属ワイヤと接続される金属膜と、を有し、
前記金属膜は、Ag結晶粒の結晶粒間にナノ粒子が配置されたAgめっき膜であることを特徴とするリードフレーム。 - 前記ナノ粒子の粒径は、0.01μm〜0.5μmであることを特徴とする請求項1または2記載のリードフレーム。
- 前記ナノ粒子は、炭素粒子であることを特徴とする請求項1ないし3のうち、いずれか1項記載のリードフレーム。
- 請求項1ないし4のうち、いずれか1項記載のリードフレームと、
前記ダイパッドに接着された前記半導体チップと、
前記金属膜と前記電極パッドを電気的に接続する前記金属ワイヤと、
前記リードの一部、前記半導体チップ、前記金属ワイヤ、及び前記Agめっき膜を封止するモールド樹脂と、を備えたことを特徴とする半導体装置。 - 半導体チップが接着されるダイパッド、及び前記ダイパッドの周囲に複数配置されたリードを有すると共に、Cu又はCuを含んだ合金により構成されたリードフレーム本体と、前記リードフレーム本体に設けられ、前記半導体チップの電極パッドと接続された金属ワイヤと接続される金属膜と、を有したリードフレームの製造方法であって、
粒子径が0.01μm〜0.5μmとされたナノ粒子が分散されたAgめっき液を用いた電解めっき法により、前記金属膜の形成領域に対応する部分の前記リードフレーム本体に、前記金属膜として前記ナノ粒子を含んだAgめっき膜を形成することを特徴とするリードフレームの製造方法。 - 半導体チップが接着されるダイパッド、及び前記ダイパッドの周囲に複数配置されたリードを有するリードフレーム本体と、前記リードフレーム本体に設けられたCu膜と、前記Cu膜上に設けられ、前記半導体チップの電極パッドと接続された金属ワイヤと接続される金属膜と、を有したリードフレームの製造方法であって、
前記金属膜の形成領域に対応する部分の前記リードフレーム本体に、めっき法により前記Cu膜を形成するCu膜形成工程と、
粒子径が0.01μm〜0.5μmとされたナノ粒子が分散されたAgめっき液を用いた電解めっき法により、前記Cu膜上に、前記金属膜として、前記ナノ粒子を含んだAgめっき膜を形成するAgめっき膜形成工程と、を含むことを特徴とするリードフレームの製造方法。 - 前記Agめっき液は、前記ナノ粒子を0.1wt%〜20wt%含有することを特徴とする請求項6または7記載のリードフレームの製造方法。
- 前記ナノ粒子は、炭素粒子であることを特徴とする請求項6ないし8のうち、いずれか1項記載のリードフレームの製造方法。
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