作者: Tetsuya Tsumura , Etsuo Tsujimoto , Hiroharu Nishiyama
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摘要: A heat dissipating wiring board is provided with a metal whereupon circuit pattern formed; filler containing resin layer wherein the embedded to have upper surface of exposed from surface; and plate arranged on lower layer. The formed by penetrating groove board, composed fine opened at an extending which extends end portion board. has improved reliability against electrical insulation due dusts like in gap groove.