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US 5,349,922 AGranted
Free standing diamond sheet and method and apparatus for making same
AssigneeGeneral Electric Company
InventorsThomas R. Anthony, James F. Fleischer
Life of this patent
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AssigneeGeneral Electric Company
InventorsThomas R. Anthony, James F. Fleischer
Estimating the term…
The bond strength between a diamond and the substrate onto which it is deposited by the chemical vaporization method is decreased to the point where the diamond can be removed from the substrate as a free standing monolithic sheet. The bond strength can be decreased by polishing the substrate, removing corners from the substrate, slow cooling of the substrate after deposition, an intermediate temperature delay in cooling or the application or formation of an intermediate layer between the diamond and the substrate. The free standing sheet of diamond can be used as a laser lens, metallized to form a mirror, or silver soldered to tungsten carbide to form a cutting tool.
An apparatus for making a diamond by the chemical vapor deposition of an intact sheet of diamond onto a substrate wherein the improvement comprises a uniformly smooth diamond receiving surface on the substrate to provide uniform adhesion sufficient to retain the diamond on the substrate during deposition, but weak enough to allow removal of the diamond from the substrate without breakage after deposition.
An apparatus for the chemical vapor deposition of diamond onto a substrate wherein the improvement comprises the substrate being coated with a material which facilitates release of the diamond from the substrate.
Dependencies are inferred from the claim text.