KR102076547B1 - 열전도성 페이스트 및 전자 장치 - Google Patents
열전도성 페이스트 및 전자 장치 Download PDFInfo
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- KR102076547B1 KR102076547B1 KR1020197013439A KR20197013439A KR102076547B1 KR 102076547 B1 KR102076547 B1 KR 102076547B1 KR 1020197013439 A KR1020197013439 A KR 1020197013439A KR 20197013439 A KR20197013439 A KR 20197013439A KR 102076547 B1 KR102076547 B1 KR 102076547B1
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- conductive paste
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Abstract
Description
도 1은 본 실시형태에 관한 반도체 장치의 일례를 나타내는 단면도이다.
Claims (19)
- 열경화성 수지와 열전도성 필러를 포함하는, 열전도성 페이스트로서,
당해 열전도성 페이스트의 경화물의 열전도율이 5W/mK 이상 15W/mK 이하이고,
하기의 측정 방법으로 산출된 젖음 확산 면적의 비율이 90% 이상이며,
상기 열전도성 필러의 평균 입경 D50을 D로 하고, 상기 열전도성 필러를 제외한 당해 열전도성 페이스트의, 실온 25℃에 있어서의 점도를 η로 하며, 당해 열전도성 페이스트 중에 있어서의 상기 열전도성 필러의 침강 정도를, S=D2/η로 했을 때, S가 8.0[10-12·m3·s/kg] 이상 802.8[10-12·m3·s/kg] 이하인, 열전도성 페이스트.
(젖음 확산 면적의 측정 방법)
5cc의 시린지를 사용하여, 리드 프레임의 표면에 당해 열전도성 페이스트를, 2mm×2mm의 정사각형의 대각선을 연결하는 각각의 대각선을 따라 일단에서 타단까지 도포하여, 2개의 도포선이 교차하도록 도포한다. 이어서, 실온 25℃에서 8시간 정치한다. 이어서, 2mm×2mm의 실리콘 베어 칩(두께 0.525mm)을 상기 리드 프레임에 당해 열전도성 페이스트를 개재하여 50g, 50ms의 하중으로 마운트한 후, 상기 실리콘 베어 칩의 표면에 대한, 당해 열전도성 페이스트의 상기 젖음 확산 면적의 비율을 산출한다. - 청구항 1에 있어서,
상기 열전도성 필러의 평균 입경 D50이, 0.1μm 이상 10μm 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열전도성 필러의 D95가 15μm 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열전도성 필러가, 금속, 산화물, 또는 질화물을 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열전도성 필러의 함유량은, 당해 열전도성 페이스트 전체에 대하여, 50질량% 이상 88질량% 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열경화성 수지의 중량 평균 분자량이, 100 이상 500 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열경화성 수지는, 바이페닐 골격을 갖는 수지를 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열경화성 수지는, 에폭시 수지를 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
경화제를 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
아크릴 화합물을 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
반응성 희석제를 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
경화 촉진제를 포함하는, 열전도성 페이스트. - 청구항 1에 있어서,
용제를 포함하지 않는, 열전도성 페이스트. - 청구항 10에 있어서,
상기 아크릴 화합물이 (메트)아크릴 모노머를 포함하고,
상기 (메트)아크릴 모노머의 함유량이, 당해 열전도성 페이스트 전체에 대하여 1질량% 이상 15질량% 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
상기 열전도성 필러가 은 가루를 포함하고,
상기 은 가루의 함유량이, 당해 열전도성 페이스트 전체에 대하여 50질량% 이상 88질량% 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
바이페닐 골격을 갖는 수지 및 (메트)아크릴 모노머를 포함하고,
상기 바이페닐 골격을 갖는 수지 및 상기 (메트)아크릴 모노머의 함유량이, 당해 열전도성 페이스트 전체에 대하여 3질량% 이상 20질량% 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
바이페닐 골격을 갖는 페놀 수지 및 (메트)아크릴 모노머를 포함하고,
상기 바이페닐 골격을 갖는 페놀 수지 및 상기 (메트)아크릴 모노머의 함유량이, 당해 열전도성 페이스트 전체에 대하여 3질량% 이상 20질량% 이하인, 열전도성 페이스트. - 청구항 1에 있어서,
하기의 수순으로 측정된 다이 시어 강도가 14N/mm2 이상 22N/mm2 이하인, 열전도성 페이스트.
(다이 시어 강도의 측정 방법)
열전도성 페이스트를 이용하여, Ag 도금 칩(세로×가로×두께: 2mm×2mm×0.35mm)을 지지체 Ag 도금 프레임 상에 마운트하고, 오븐을 이용하여 175℃ 60분의 경화 온도 프로파일로 경화하여 샘플을 작성한다. 얻어진 샘플에 대하여, 85℃, 습도 85%의 조건하에서 72시간 흡습 처리한 후, 260℃에 있어서의 열시(熱時) 다이 시어 강도를 측정한다(단위: N/1mm2). - 청구항 1 내지 청구항 18 중 어느 한 항에 기재된 열전도성 페이스트의 경화물을 구비하는, 전자 장치.
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