KR20020045360A - Ag 선도금을 이용한 반도체 패키지용 리드프레임 - Google Patents
Ag 선도금을 이용한 반도체 패키지용 리드프레임 Download PDFInfo
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- KR20020045360A KR20020045360A KR1020000074793A KR20000074793A KR20020045360A KR 20020045360 A KR20020045360 A KR 20020045360A KR 1020000074793 A KR1020000074793 A KR 1020000074793A KR 20000074793 A KR20000074793 A KR 20000074793A KR 20020045360 A KR20020045360 A KR 20020045360A
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Abstract
Description
Claims (5)
- 구리(Cu), 구리 합금 또는 철-니켈 합금으로 된 기저 금속층;상기 기저 금속층의 적어도 일측면 상에 형성되며 니켈(Ni) 또는 니켈 합금으로 구성된 하지 도금층;상기 하지 도금층 상에 형성되며 팔라듐(Pd) 또는 팔라듐 합금으로 이루어진 0.00025 ∼ 0.1㎛ (0.1 ∼ 4 마이크로인치) 두께의 중간 도금층; 및상기 중간 도금층 상에 형성되며 은(Ag) 또는 은 합금으로 이루어진 0.05 ∼ 0.75㎛ (2 ∼ 30 마이크로인치) 두께의 외각 도금층을 포함하는 것을 특징으로 하는 반도체 패키지용 리드프레임.
- 구리(Cu), 구리 합금 또는 철-니켈 합금으로 된 기저 금속층;상기 기저 금속층의 적어도 일측면 상에 형성되며 니켈(Ni) 또는 니켈 합금으로 구성된 하지 도금층;상기 하지 도금층 상에 형성되며 팔라듐(Pd) 또는 팔라듐 합금으로 이루어진 0.00025 ∼ 0.1㎛ (0.1 ∼ 4 마이크로인치) 두께의 중간 도금층; 및상기 중간 도금층 상에 형성되며 은(Ag) 또는 은 합금으로 이루어진 0.05 ∼ 0.75㎛ (2 ∼ 30 마이크로인치) 두께의 외각 도금층을 포함하며,상기 중간 도금층이 변조된 전류를 도금욕에 인가하여 형성된 것임을 특징으로 하는 반도체 패키지용 리드프레임.
- a) 기저 금속층을 공급하는 단계;b) 상기 기저 금속층을 전처리하는 단계;c) 상기 기저 금속층 상에 니켈 또는 니켈 합금으로 이루어진 하지 도금층을 형성하는 단계;d) 상기 단계 c)의 결과물을 팔라듐 또는 팔라듐 합금을 포함하는 도금욕에 침적시키고 상기 도금욕에 주파수 대역이 1000 ∼ 20000㎐ 이고 듀티 싸이클이 5 ∼ 45%이며 평균 전류밀도가 0.1 ∼ 3A/dm2인 변조된 전류를 인가하여 중간 도금층을 형성하는 단계; 및e) 상기 중간 도금층 상에 은 또는 은 합금으로 이루어진 외각 도금층을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 패키지용 리드프레임의 제조방법.
- 제1항 내지 3항중 어느 한항에 있어서,상기 하지 도금층 형성시에 니켈 또는 니켈 합금을 포함하는 도금욕에 인가되는 변조된 전류는 주파수 대역이 100 ∼ 20000㎐이고 듀티 싸이클이 5 ∼ 80%이며 평균 전류밀도가 15 ∼ 35A/dm2이며,상기 중간 도금층 형성시 팔라듐 또는 팔라듐 합금을 포함하는 도금욕에 인가되는 변조된 전류는 주파수 대역이 100 ∼ 20000㎐이고 듀티 싸이클이 5 ∼ 45%이며 평균 전류밀도가 0.1 ∼ 3A/dm2이며;상기 외각 도금층 형성시 은 또는 은 합금을 포함하는 도금욕에 인가되는 전류는 평균 전류밀도가 1 ∼ 5A/dm2인 것을 특징으로 하는 반도체 패키지용 리드프레임 또는 그의 제조방법.
- 제1항 내지 3항중 어느 한항에 있어서, 상기 니켈 합금은 80 ∼ 99.999중량%의 니켈과 0.001 ∼ 20중량%의 인(P)으로 구성된 것이고;상기 팔라듐 합금은 팔라듐 80 ∼ 99.999중량%와, 금(Au), 은(Ag), 루테늄(Ru), 니켈(Ni) 및 인(P)으로 이루어진 군으로부터 선택된 하나 이상의 금속 0.001 ∼ 20중량%로 구성된 것이며;상기 은 합금은 은(Ag) 80 ∼ 99.999중량%와, 팔라듐(Pd), 금(Au), 루테늄(Ru), 니켈(Ni) 및 인(P)으로 이루어진 군으로부터 선택된 하나 이상의 금속 0.001 ∼ 20중량%로 구성된 것임을 특징으로 하는 반도체 패키지용 리드프레임 또는 그의 제조방법.
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KR100371567B1 (ko) | 2003-02-07 |
US20020104682A1 (en) | 2002-08-08 |
US6518508B2 (en) | 2003-02-11 |
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