Patent ID: 7820131

Claim:
A process for producing a laser inscribed mark on a single crystal CVD diamond, the process comprising: i) laser inscribing a mark onto a diamond substrate prior to initiating the CVD process to prepare a single-crystal diamond; ii) controlling the temperature of a growth surface of the diamond such that the temperature of the growing diamond crystals is in the range of 900-1400° C. and the diamond is mounted in a heat sink holder made of a material that has a high melting point and high thermal conductivity to minimize temperature gradients across the growth surface of the diamond; and iii) growing single-crystal diamond by microwave plasma chemical vapor deposition on the growth surface of a diamond in a deposition chamber having an atmosphere greater than 150 torr, wherein the atmosphere comprises from about 8% to in excess of about 30% CH 4 per unit of H 2 , wherein the mark is transferred from the diamond substrate to the single crystal CVD diamond through this process.