Patent ID: 7399358
Filing Date: 2008-07-15
Classification: C30B

Abstract:
1. A method for joining substrates to produce a homoepitaxial monocrystalline diamond, the method comprising the steps of: a. placing at least two substrates on a substrate holder in a chemical vapor deposition vacuum chamber wherein the at least two substrates are positioned with respect to each other such that growth faces of the at least two substrates form a wedge and other faces are masked, wherein the growth faces have a crystallographic orientation of (100); b. providing a diamond forming gas adjacent to the at least two substrates in the chemical vapor deposition vacuum chamber; c. generating a plasma from the diamond forming gas by exposing the diamond forming gas to microwave radiation; and d. exposing the at least two substrates to the plasma under conditions wherein the diamond growth occurs in the wedge between the at least two substrates so that the at least two substrates are joined to form the large homoepitaxial monocrystalline diamond, wherein the at least two substrates are maintained at temperatures ranging from 800° C. to 1600° C.