Accession Number : ADD018372

Title :   Growing and Releasing Diamonds.

Descriptive Note : Patent, Filed 28 Jan 94, patented 24 Dec 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Marchywa, Michael J ; Pehrsson, Pehr E

Report Date : 24 Dec 1996

Pagination or Media Count : 5

Abstract : A process for making diamond and diamond products includes the steps of implanting ions in a diamond substrate to form a damaged layer of nondiamond carbon below the top surface of the substrate, heating the substrate to about 600-1200 deg C. growing diamond on the top surface of the heated substrate by chemical vapor deposition, and electrochemically etching the damaged layer to separate the grown diamond from the substrate along the diamond layer. The diamond product consists of a first diamond layer and a second diamond layer attached to the first layer. The second layer contains damage caused by ions traversing the second layer.

Descriptors :   *DIAMONDS, *CHEMICAL VAPOR DEPOSITION, *EPITAXIAL GROWTH, *PATENTS, IONS, LAYERS, ELECTROCHEMISTRY, SUBSTRATES, ETCHING, SURFACES, HEAT

Subject Categories : Inorganic Chemistry
      Crystallography
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE