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Fabrication of insulated metal substrates with organic ceramic composite films for high thermal conductivity
Affiliation:1. R & D Division, Feelstone Inc., 37 Eco-gil, Damyang-eup, Damyang-gun, Jeollanam-do 517-700, Republic of Korea;2. 3D Conversion Business Center, Gwanju Technopark, 333 Cheomdan-gwagiro, Buk-gu, Gwangju 500-706, Republic of Korea;3. Optoelectronic Convergence Research Center, Department of Material Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea;1. Keio Photonics Research Institute, Keio University, E, 7-1 Shinkawasaki, Saiwai-ku, Kawasaki, Kanagawa 212-0032, Japan;2. Polymer Research Institute, NYU Polytechnic School of Engineering, 6 MetroTech Center, Brooklyn, NY 11201, USA;1. Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta st., 30-059 Kraków, Poland;2. Institute of Advanced Manufacturing Technology, 37a Wroc?awska st., 30-011 Kraków, Poland;3. Warsaw University of Technology, 141 Wo?oska st., 02-507 Warszawa, Poland;1. School of Materials Science and Technology, Xi’an University of Technology, Xi’an 710048, China;2. College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China;3. Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan;1. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan;2. BioFirst Corporation, Neihu Rd., Neihu District, Taipei, Taiwan
Abstract:Insulated metal substrates (IMSs) were fabricated and characterized using an organic ceramic composite as a coating mixture. Organic‐inorganic sol solutions were prepared by a sol‐gel process using TEOS (tetraethylorthosilicate), MTMS (methyltrimethoxysilane) and PhTMS (phenyltrimethoxysilane). Ceramic fillers were composed of aluminum oxide (1 and 4 µm) and silicon nitride. The optimal ratio of ceramic filler in the coating mixture was found to be 70 wt%. A thermal conductivity of 3.16 W/mK and a breakdown voltage of 4 kV with a leakage current of 0.17 mA/cm2 were obtained for the 122 µm-thick film. A well-networked microstructure between the sol resin and filler in the organic ceramic composite films enhanced the properties of the IMS, such as thermal conductivity and electric insulation.
Keywords:Insulated metal substrate  Organic ceramic composite  Coating mixture  Sol-gel  Thermal conductivity  Breakdown voltage
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