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Hahn, Byung-Dong,Kim, Yuna,Ahn, Cheol-Woo,Choi, Jong-Jin,Ryu, Jungho,Kim, Jong-Woo,Yoon, Woon-Ha,Park, Dong-Soo,Yoon, Seog-Young,Ma, Byungjin Elsevier 2016 CERAMICS INTERNATIONAL Vol.42 No.16
<P><B>Abstract</B></P> <P>For effective heat dissipation in high-power LED applications, aluminum nitride (AlN) thick films as thermally conductive dielectric layers were developed, which were deposited on an Al substrate by aerosol deposition (AD). The aerosol-deposited AlN thick films on Al substrates have advantages over conventional polymer-based dielectric substrates or ceramic substrate mounted heatsink systems including an epoxy adhesive, such as excellent heat dissipation capacity and low thermal resistance. AD is an effective method to fabricate high-quality AlN thick film without the Al<SUB>2</SUB>O<SUB>3</SUB> phase because the film is formed at room temperature. Highly dense and well-adhered, pure AlN thick films with thicknesses up to 30µm were deposited on an Al substrate. AlN-Al<SUB>2</SUB>O<SUB>3</SUB> and AlN-polyvinylidene fluoride (PVDF) composite films were also deposited on an Al substrate in order to investigate the effect of Al<SUB>2</SUB>O<SUB>3</SUB> and polymer on the microstructure and thermal properties. Among the films, pure AlN thick film exhibited the highest dielectric strength, the highest thermal conductivity, and the lowest thermal resistance. Therefore, it can be expected that the aerosol-deposited AlN thick film on Al substrate could be used as a powerful heatsink.</P>
Research using a remote observation for the Radio Telescope of Gwacheon National Science Museum
Jaeil Cho,Bong Won Shon,Tae Hyun Kim,Hyo Ri Jeon,Jae Seong Noh,Ye Som Jung,Chae Rin Kim,Jung Si Woo,Son Young Jin,YoungPyo Hong,Haerang Park,Sungmin Lim,Yuna Hahn,Taehyun Jung,Jung-Hoon Kim 한국천문학회 2022 天文學會報 Vol.47 No.1