| 摘要 |
PURPOSE:To prevent the bonding resin failure such as protruding, and improve the bonding strength, by fixing a ceramic substrate on the satin finished surface of a heat sink which is selectively subjected to a satin processing. CONSTITUTION:After the whole part of a heat sink 1 except a part 3 where a ceramic substrate is to be fixed is masked with a photoresist or the like, particles such as corundum are made to collide with the heat sink 1. Thereby, only the part 3 of the heat sink 1 where the ceramic substrate is to be fixed is subjected to a satin processing. By exfoliating the photoresist or the like, a satin finished part 4 is obtained, and thereon the ceramic substrate 2 is fixed with resin. Thereby, the resin is prevented from spreading to unnecessary parts, and the adhesion of resin is improved.
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