JP5161603B2 - 集積回路ダイ及びその製造方法 - Google Patents
集積回路ダイ及びその製造方法 Download PDFInfo
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- JP5161603B2 JP5161603B2 JP2008033544A JP2008033544A JP5161603B2 JP 5161603 B2 JP5161603 B2 JP 5161603B2 JP 2008033544 A JP2008033544 A JP 2008033544A JP 2008033544 A JP2008033544 A JP 2008033544A JP 5161603 B2 JP5161603 B2 JP 5161603B2
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Description
2.パッシベーション層66をウェットケミカルエッチングまたはドライエッチングによりエッチングし、ライン60D及び60E上に縦方向の溝を形成する。例えば、反応性イオンエッチング(RIE)を用いることができる。
3.ライン60D及び60Eの露出された面にトリクロロエタン(TCA)を施して脱脂し、直後にフッ化水素酸(HF)を用いて露出面に形成された酸化物をエッチングする。
4.亜鉛酸塩溶液を用いて無電解めっきにより亜鉛薄膜を形成し、形成された亜鉛膜を硫酸によってエッチバック(etch back)する。滑らかで均一な亜鉛層を形成するべく、この過程を数回繰り返す。その結果、好ましくは単層である亜鉛層68を形成する。
5.ニッケル層67をニッケル次リン酸塩(hypophosphate nichel)溶液を用いた無電解めっきにより形成し、約12乃至25μmの厚さにする。
6.ニッケル層67の露出面を水洗する。
7.ウェハを金の溶液に浸け、ニッケル層67上に厚さ0.1乃至0.3μmの金の薄層を形成する。
8.金の薄層を塩化水素酸によって洗浄する。
9.自触媒作用を有するシアン化物/金溶液を用いて、金の薄層上に更に金を無電解めっきし、金の層69を形成する。
10.仕上げに水で洗浄する。ダイアタッチ後、好ましくはダイのエッジ付近に於いて、露出されている金にワイヤをボンディングする。金またはアルミニウムワイヤを用いることができる。
1s〜5s スクエア
60 導電性金属層
60A〜60F 導電性ライン
60G バス
60H バス
61 金属ストラップ層
61A、61D 金属ストラップ
61Aa、61Ab ストラップ61Aの側縁
62、63 ワイヤ
62B、63B ボンディング位置
64 シリコン基板
65 酸化膜
66 パッシベーション層
67 ニッケル層
68 亜鉛層
69 金の層
70 第1金属層
70A〜70G 導電性ライン
71 第2金属層
71A、71B バス
72 金属ストラップ層
73A〜73F Pボディ領域
74A〜74D ゲート
75 ドレイン金属ストラップ
76A、76B 第2金属バス
77A、77B 第1金属バス
78 ソース金属ストラップ
79 パッシベーション層
80 P基板(P-sub)
81 P埋込み層
82 P隔離領域(PISO)
83 ゲート酸化膜
84 ポリシリコンゲート
85A、85B Pボディ領域
100A〜100F 導電性ライン
101A ドレインバス
101B ソースバス
102A、102B 金属ストラップ
110 P基板
111 Pエピタキシャル層
112 N埋込み層
113 Nウェル
114 Pウェル
115A〜115D LOCOS酸化領域
116A〜116D ゲート
117A N+コンタクト領域
117B P+コンタクト領域
118A〜118G バス
119A、119B バス
120A〜120D 金属ストラップ
121A〜121D バス
140 グランドバス
ALSS、BLSS、CLSS、AHSS、BHSS、CHSS MOSFET
Aout、Bout、Cout 出力パット
D ドレインフィンガ
MA〜MF MOSFET
Rwire ボンディングワイヤ抵抗
Rmetal メタルフィンガ抵抗
S ソースフィンガ
Vsource ソースフィンガS上の電圧
Vdrain ドレインフィンガD上の電圧
VDD 端子電圧(供給電圧)
Claims (9)
- 集積回路ダイの製造方法であって、
半導体基板内に半導体デバイスを形成する過程と、
前記基板上に絶縁層を形成する過程と、
前記絶縁層を通過するバイアを形成する過程と、
前記絶縁層上に導電経路を形成し、前記バイアを介して前記半導体デバイスとの電気的コンタクトを形成する過程と、
前記絶縁層及び前記導電経路上にパッシベーション層を形成する過程と、
前記パッシベーション層をエッチングして前記導電経路の上に縦方向溝を形成し、前記導電経路の露出面を生成する過程と、
前記露出面及び前記パッシベーション層上に金属層を被着し、前記金属層をエッチングして前記金属層が前記縦方向溝より大きいサイズになるようにすることを含み、前記露出面上に、且つ前記パッシベーション層のエッジにオーバラップするように、接着層を形成する過程と、
無電解めっきによる厚い金属層の形成を含み、前記導電経路の全長を覆って、前記パッシベーション層の上面よりも上の所定の高さに配置される上面を有するように、前記接着層上に金属ストラップを形成する過程とを含み、
前記接着層が形成される領域が、前記金属ストラップが形成される領域を画定するようにすることを特徴とする集積回路ダイの製造方法。 - 前記パッシベーション層のエッチング過程がウェットエッチングによって行われることを特徴とする請求項1に記載の方法。
- 前記パッシベーション層のエッチング過程がドライエッチングによって行われることを特徴とする請求項1に記載の方法。
- 前記パッシベーション層のエッチング過程が反応性イオンエッチングによって行われることを特徴とする請求項1に記載の方法。
- 前記厚い金属層が、ニッケル層よりなることを特徴とする請求項1に記載の方法。
- 前記金属ストラップの形成過程が、前記厚い金属層の上に金の層をめっきする過程を含むことを特徴とする請求項1に記載の方法。
- 前記厚い金属層が、金の層よりなることを特徴とする請求項1に記載の方法。
- 前記接着層がチタンを含んでいることを特徴とする請求項1に記載の方法。
- 前記接着層が亜鉛を含んでいることを特徴とする請求項1に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US08/367,388 | 1994-12-30 | ||
US08/367,388 US5767546A (en) | 1994-12-30 | 1994-12-30 | Laternal power mosfet having metal strap layer to reduce distributed resistance |
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Application Number | Title | Priority Date | Filing Date |
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JP7353915A Division JPH08264785A (ja) | 1994-12-30 | 1995-12-28 | 集積回路ダイ及びその製造方法 |
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JP7353915A Pending JPH08264785A (ja) | 1994-12-30 | 1995-12-28 | 集積回路ダイ及びその製造方法 |
JP2008033544A Expired - Lifetime JP5161603B2 (ja) | 1994-12-30 | 2008-02-14 | 集積回路ダイ及びその製造方法 |
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US (3) | US5767546A (ja) |
EP (1) | EP0720225B1 (ja) |
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- 1995-12-29 DE DE69533691T patent/DE69533691T2/de not_active Expired - Lifetime
- 1995-12-29 EP EP95309533A patent/EP0720225B1/en not_active Expired - Lifetime
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1997
- 1997-08-06 US US08/907,276 patent/US5945709A/en not_active Expired - Lifetime
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1999
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2008
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EP0720225A3 (ja) | 1996-07-17 |
US6159841A (en) | 2000-12-12 |
US5945709A (en) | 1999-08-31 |
US5767546A (en) | 1998-06-16 |
EP0720225B1 (en) | 2004-10-27 |
DE69533691D1 (de) | 2004-12-02 |
JPH08264785A (ja) | 1996-10-11 |
EP0720225A2 (en) | 1996-07-03 |
JP2008124516A (ja) | 2008-05-29 |
DE69533691T2 (de) | 2006-02-02 |
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