고열전도도 및 장기 안정성을 지닌 실리콘 오일 기반 방열 페이스트 제조법
Manufacturing Strategies for Silicone Oil Based Stable Thermal Pastes with High Thermal Conductivity
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초록
전자 기기의 급속한 소형화 및 전력 밀도 증가로 인해 기기 구동 중 많은 양의 열이 발생하게 되면서 높은 열전도도를 갖는 열계면소재와 같은 방열소재의 수요가 급증하고 있다. 이 중, 액상 고분자와 방열 필러의 혼합물인 페이스트 형태의 방열소재는 열원과 히트 싱크 사이의 거친 표면을 효과적으로 채워 방열 효율을 극대화할 수 있다. 하지만, 일반적으로 방열 페이스트는 반복적인 가열 및 냉각 그리고 가압의 극단적 조건에서 필러/수지 상 분리 등의 이유로 낮은 장기안정성을 갖는다. 따라서, 최근 우수한 장기 안정성을 지니는 고기능성 방열 페이스트의 연구가 활발히 진행되고 있다. 본 논문에서는 실리콘 오일 수지와 방열 필러 혼합물로 높은 열전도도와우수한 장기 안정성을 동시에 지니는 방열 페이스트를 제작하는 다양한 전략을 소개하고자 한다.
Abstract
Due to the rapid miniaturization and increased power density of electronic devices, a significant amount of heat is generated during operation. This has led to a surge in demand for thermal management materials, such as thermal interface materials (TIMs) with high thermal conductivity. Among the various types, paste-type TIMs, mixtures of liquid silicone polymers and thermal fillers, can effectively fill the rough surfaces between heat sources and heat sinks, thereby ensuring efficient heat dissipation. However, thermal pastes generally exhibit poor long-term stability due to issues like filler/resin phase separation under extreme conditions of repeated heating, cooling, and prolonged compression. Consequently, research on high-performance thermal pastes with excellent long-term stability is actively underway. This paper aims to introduce various strategies for producing silicone oil based thermal pastes that achieve both high thermal conductivity and superior long-term stability.
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