KR101156819B1 - 솔더볼의 무플럭스 마이크로-피어싱 방법 및 이를 채용한 장치 - Google Patents
솔더볼의 무플럭스 마이크로-피어싱 방법 및 이를 채용한 장치 Download PDFInfo
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- KR101156819B1 KR101156819B1 KR1020107012500A KR20107012500A KR101156819B1 KR 101156819 B1 KR101156819 B1 KR 101156819B1 KR 1020107012500 A KR1020107012500 A KR 1020107012500A KR 20107012500 A KR20107012500 A KR 20107012500A KR 101156819 B1 KR101156819 B1 KR 101156819B1
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Abstract
Description
도 1a 내지 1d는 본 발명에 따른 예시적인 장치의 다양한 도면이다.
도 2a 내지 2b는 본 발명에 따른 피어싱 본드 구조체들을 이용하여 달성될 수 있는 감소된 피치를 도시한다.
도 3은 상이한 크기의 솔더볼들과 결합된(engaged) 본 발명에 따른 피어싱 본드 구조체들을 도시한다.
도 4는 본 발명에 따른 피어싱 본드 구조체들을 위한 다양한 예시적인 말단 구조들을 도시한다.
도 5a 내지 도 5d는 본 발명에 따른 피어싱 본드 구조체들을 형성하기 위한 예시적인 프로세스 흐름을 도시한다.
16: 솔더볼 20: 산화막
22: 피어싱 본드 구조체 23: 산화방지막
30: 절연물질
Claims (22)
- 기판상에 도전성 물질의 층을 형성하는 단계;
상기 도전성 물질의 층 상에 마스크층(masking layer)을 형성하는 단계;
그 위치에서 상기 마스크층을 가지고 상기 도전성 물질의 층에 제1 에칭 프로세스를 수행하는 단계;
상기 마스크층을 제거하는 단계; 및
상기 마스크층을 제거한 후에, 상기 도전성 물질의 층에 등방성 에칭 프로세스를 수행하여 상기 기판 상에 위치된 복수의 피어싱 본드 구조체들(piercing bond structures)의 선명한 윤곽을 형성하는 단계
를 포함하는 것을 특징으로 하는 방법. - 청구항 1에 있어서,
복수의 솔더볼들을 갖는 집적 회로 다이를 제공하는 단계로서, 상기 복수의 솔더볼들 각각은 상기 솔더볼의 외부 표면상에 산화물 층을 갖는 상기 집적 회로 다이를 제공하는 단계;
적어도 상기 솔더볼들을 가열하는 단계; 및
상기 복수의 피어싱 본드 구조체들 각각이 그 위에 형성된 상기 산화물 층을 갖는 상기 솔더볼들 중 하나를 천공하여 이로써 상기 솔더볼과 상기 피어싱 본드 구조체 사이의 도전성 연결을 확립도록 야기시키는 힘을 인가하는 단계
를 더 포함하는 것을 특징으로 하는 방법. - 청구항 2에 있어서, 상기 청구항 2의 방법의 각 단계들은 산소-함유 주변 환경(oxygen-containing ambient environment)에서 수행되는 것을 특징으로 하는 방법.
- 청구항 2에 있어서, 상기 적어도 상기 솔더볼들을 가열하는 단계는 상기 솔더볼들의 물질의 녹는점 이상의 온도로 적어도 상기 솔더볼들을 가열하는 단계를 포함하는 것을 특징으로 하는 방법.
- 청구항 2에 있어서, 상기 힘을 인가하는 단계는 0.5 내지 2초 범위의 지속시간동안 5 내지 12Kg의 범위의 힘을 인가하는 단계를 포함하는 것을 특징으로 하는 방법.
- 청구항 2에 있어서, 상기 청구항 2의 방법의 각 단계들은 상기 복수의 솔더볼들에 무플럭스 솔더링(fluxless soldering)으로 수행되는 것을 특징으로 하는 방법.
- 청구항 1에 있어서, 상기 제1 에칭 프로세스는 이방성(anisotropic) 에칭 프로세스인 것을 특징으로 하는 방법.
- 청구항 3에 있어서, 상기 기판은 인쇄 회로 기판을 포함하는 것을 특징으로 하는 방법.
- 청구항 1에 있어서, 상기 복수의 피어싱 본드 구조체들 각각은 삼각형 단면 구조를 갖는 것을 특징으로 하는 방법.
- 복수의 솔더볼들을 갖는 집적 회로 다이를 제공하는 단계로서, 상기 복수의 솔더볼들 각각은 상기 솔더볼의 외부 표면에 산화물 층을 갖는 상기 집적 회로 다이를 제공하는 단계;
적어도 상기 솔더볼들을 가열하는 가열 프로세스를 수행하는 단계; 및
기판 상의 복수의 피어싱 본드 구조체들 각각이 상기 솔더볼들 중 하나와 그와 연관된 산화물 층을 천공하여 이로써 상기 솔더볼과 상기 피어싱 본드 구조체 사이의 도전성 연결을 확립도록 야기시키는 힘을 인가하는 단계
를 포함하는 것을 특징으로 하는 방법. - 청구항 10에 있어서, 상기 청구항 10의 방법의 각 단계들은 산소-함유 주변 환경(oxygen-containing ambient environment)에서 수행되는 것을 특징으로 하는 방법.
- 청구항 10에 있어서, 상기 가열 프로세스를 수행하는 단계는 상기 솔더볼들의 물질의 녹는점 이상의 온도로 적어도 상기 솔더볼들을 가열하는 단계를 포함하는 것을 특징으로 하는 방법.
- 청구항 10에 있어서, 상기 힘을 인가하는 단계는 0.5 내지 2초 범위의 지속시간동안 5 내지 12Kg의 범위의 힘을 인가하는 단계를 포함하는 것을 특징으로 하는 방법.
- 청구항 11에 있어서, 상기 청구항 10의 방법의 각 단계들은 상기 복수의 솔더볼들에 무플럭스 솔더링(fluxless soldering)으로 수행되는 것을 특징으로 하는 방법.
- 청구항 12에 있어서, 상기 기판은 인쇄 회로 기판을 포함하는 것을 특징으로 하는 방법.
- 청구항 13에 있어서, 상기 복수의 피어싱 본드 구조체들 각각은 삼각형 단면 구조를 갖는 것을 특징으로 하는 방법.
- 집적 회로 다이 상의 본드 패드들에 도전적으로 결합되고, 그 각각이 그 외부 표면에 산화물 층을 갖는 복수의 솔더볼들을 갖는 상기 집적 회로 다이; 및
그 각각이 대응하는 솔더볼로 적어도 부분적으로 관통하고 연장하여 이로써 상기 솔더볼과 피어싱 본드 구조체 사이의 도전성 연결을 확립하는 복수의 피어싱 본드 구조체를 포함하는 기판으로서, 상기 피어싱 본드 구조체는 상기 산화물 층을 관통하는 상기 기판
을 포함하는 것을 특징으로 하는 장치. - 청구항 17에 있어서, 상기 피어싱 본드 구조체들은 평평하지 않은 말단(non-flat end)을 갖는 것을 특징으로 하는 장치.
- 청구항 17에 있어서, 상기 피어싱 본드 구조체들 각각은 상기 피어싱 본드 구조체의 외부 표면에 형성된 적어도 하나의 산화방지층을 포함하는 것을 특징으로 하는 장치.
- 청구항 19에 있어서, 상기 적어도 하나의 산화방지층은 복수의 물질의 층들을 포함하는 것을 특징으로 하는 장치.
- 청구항 20에 있어서, 상기 복수의 층들은 상기 피어싱 본드 구조체의 노출된 표면 상에 형성된 골드(gold)를 포함하는 층, 및 상기 골드를 포함하는 층 상에 형성된 니켈(nickel)을 포함하는 층을 포함하는 것을 특징으로 하는 장치.
- 청구항 17에 있어서, 상기 복수의 피어싱 본드 구조체들은 삼각형 단면 구조를 갖는 것을 특징으로 하는 장치.
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US11/958,842 | 2007-12-18 | ||
US11/958,842 US7749887B2 (en) | 2007-12-18 | 2007-12-18 | Methods of fluxless micro-piercing of solder balls, and resulting devices |
PCT/US2008/085433 WO2009079214A1 (en) | 2007-12-18 | 2008-12-03 | Methods of fluxless micro-piercing of solder balls, and resulting devices |
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US7749887B2 (en) * | 2007-12-18 | 2010-07-06 | Micron Technology, Inc. | Methods of fluxless micro-piercing of solder balls, and resulting devices |
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TW201208007A (en) * | 2010-08-02 | 2012-02-16 | Advanced Semiconductor Eng | Semiconductor package |
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CN101904230B (zh) | 2015-07-29 |
US10163840B2 (en) | 2018-12-25 |
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US7749887B2 (en) | 2010-07-06 |
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US10515918B2 (en) | 2019-12-24 |
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