Ii-vi Incorporated

Ii-vi Delaware, Inc.

Charles J Kraisinger

Wen-Qing Xu

Elgin E Eissler

Chao Liu

Thomas E Anderson

Charles D Tanner

David Sabens

Ian Currier

Michael K Aghajanian

Giovanni Barbarossa

Norbert Lichtenstein

In a method of chemical vapor deposition (CVD) growth of a polycrystalline diamond film in a CVD reactor, a gas mixture of gaseous hydrogen and a gaseous hydrocarbon is introduced into the CVD reactor. A plasma formed from the gas mixture is maintained above a surface of a conductive substrate disposed in the CVD reactor and causes a polycrystalline diamond film to grow on the surface of the conductive substrate. A temperature T at the center of the polycrystalline diamond film is controlled during growth of the polycrystalline diamond film. The CVD grown polycrystalline diamond film includes diamond crystallites that can have a percentage of orientation along a [110] diamond lattice direction&#x2265;70% of the total number of diamond crystallites forming the polycrystalline diamond film.

Highly twinned, oriented polycrystalline diamond film and method of manufacture thereof

A composite substrate includes a submount substrate of an alternating pattern of electrically insulative portions, pieces, layers or segments and electrically conductive portions, pieces, layers or segments, and a shaft, back or plate for supporting the alternating pattern of electrically insulative portions and electrically conductive portions. An active device having a P-N junction can be mounted on the submount substrate. The electrically insulative portions, pieces, layers or segments can be formed from diamond while the electrically conductive portions, pieces, layers or segments can be formed from a metal or metal alloy.

Composite substrate with alternating pattern of diamond and metal or metal alloy

A multilayer substrate includes a diamond layer CVD grown on a composite layer. The composite layer includes particles of diamond and silicon carbide and, optionally, silicon. A loading level (by volume) of diamond in the composite layer can be &#x2267;5%; &#x2267;20%; &#x2267;40%; or &#x2267;60%. The multilayer substrate can be used as an optical device; a detector for detecting radiation particles or electromagnetic waves; a device for cutting, drilling, machining, milling, lapping, polishing, coating, bonding, or brazing; a braking device; a seal; a heat conductor; an electromagnetic wave conductor; a chemically inert device for use in a corrosive environment, a strong oxidizing environment, or a strong reducing environment, at an elevated temperature, or under a cryogenic condition; or a device for polishing or planarization of other devices, wafers or films.

Substrate including a diamond layer and a composite layer of diamond and silicon carbide, and, optionally, silicon

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Saxonburg, PA, United States of America

Charles J Kraisinger