Coating processes – Coating by vapor – gas – or smoke – Carbon or carbide coating
Reexamination Certificate
2007-09-10
2010-11-16
Meeks, Timothy H (Department: 1715)
Coating processes
Coating by vapor, gas, or smoke
Carbon or carbide coating
C427S249700, C427S249110
Reexamination Certificate
active
07833581
ABSTRACT:
A method of depositing a stable diamond film on a metal substrate includes pretreating a surface of the substrate and depositing a diamond film on the substrate by way of a multi-stage chemical vapor deposition, in which each subsequent stage is performed at progressively higher temperature. The deposited diamond may be doped with boron. The substrate may be titanium, a titanium alloy, iron, an iron alloy, or any other valve metal. The diamond deposition may be a high temperature chemical vapor deposition. The first deposition stage may optionally create a carbide of diamond and substrate, and an optional mixture of diamond and amorphous carbon may be deposited to bond this carbide layer to a subsequently applied layer. The resulting product may be used as an electrode, as a tooth or blade in a cutting tool, or may have many other uses.
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Chen Guohua
Guo Liang
Meeks Timothy H
Meyer Jerald L.
Miller, Jr. Joseph
Moffa Matthew J.
The Hong Kong University of Science and Technology
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