Method of manufacturing diamond heat sink
First Claim
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1. A method of manufacturing a diamond heat sink, comprising the steps of:
- preparing a diamond polycrystal body having metal films formed on upper and lower body surfaces thereof;
cutting said diamond polycrystal body, thereby forming at least one diamond polycrystal body piece having upper and lower piece surfaces with portions of said metal films thereon and a cut surface connecting said upper and lower piece surfaces; and
after said cutting is completed, plasma-treating said cut surface of said diamond polycrystal body piece with a plasma.
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Abstract
A diamond polycrystal body having metal films on its upper and lower surfaces is cut in the vertical direction using a laser to form a diamond polycrystal body piece having upper and lower surfaces and a cut surface connecting the upper and lower surfaces. The cut surface may be damaged and include graphite resulting from the laser cutting. To remove the damage and the graphite, the cut surface of the diamond polycrystal body piece is then plasma-treated. Thereby a prescribed degree of electrical insulation between the metallized upper and lower surfaces can be ensured.
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16 Claims
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1. A method of manufacturing a diamond heat sink, comprising the steps of:
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preparing a diamond polycrystal body having metal films formed on upper and lower body surfaces thereof; cutting said diamond polycrystal body, thereby forming at least one diamond polycrystal body piece having upper and lower piece surfaces with portions of said metal films thereon and a cut surface connecting said upper and lower piece surfaces; and after said cutting is completed, plasma-treating said cut surface of said diamond polycrystal body piece with a plasma. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification