Coating processes – Coating by vapor – gas – or smoke – Carbon or carbide coating
Patent
1997-03-25
1999-07-20
King, Roy V.
Coating processes
Coating by vapor, gas, or smoke
Carbon or carbide coating
427307, 427577, 427122, C23C 1626, B05D 310
Patent
active
059254130
ABSTRACT:
A method of depositing a polycrystalline diamond layer on a nitride substrate is disclosed, which comprises chemically-etching the nitride substrate with a KOH or NaOH solution or melt and depositing the polycrystalline diamond layer on the nitride substrate from a vapor phase, wherein the etching temperature, time and concentration of the etchant are controlled so that at least 75% of the interface between the substrate and the diamond layer is covered by diamond crystals, each diamond crystal having a contact area with the substrate of .gtoreq.20 um.sup.2.
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Haubner Roland
Holzer Hermann
Lux Benno
Nechansky Helmut
Electrovac, Fabrikation elektrotechnischer Spezialartikel Gesell
Feiereisen Henry M.
King Roy V.
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