Method of manufacturing diamond heat sink

摘要

A diamond polycrystal body having metal films on its upper and lower surfaces is prepared. The diamond polycrystal body is cut in the vertical direction to form a diamond polycrystal body piece (1) having upper and lower surfaces and a cut surface connecting the upper and lower surfaces. The cut surface of diamond polycrystal body piece (1) is plasma-treated. A method of manufacturing a diamond heat sink removed of a damage layer on its cut surface and having prescribed insulation is thus provided.