Patent ID: 6132816
Filing Date: 2000-10-17
Classification: C23C,C30B

Abstract:
A method for producing a homoepitaxial diamond thin film by effecting plasma assisted CVD using a mixed gas of a carbon source and hydrogen as a reaction gas to deposit the homoepitaxial diamond thin film on a surface of a substrate, the method comprising the steps of:effecting the plasma assisted CVD with a carbon source concentration of the mixed gas set to a first level in the range of 0.025% to 0.3% for depositing a high-quality homoepitaxial diamond thin film at a film forming rate of 0.13 .mu.m/h or less; andthereafter effecting the plasma assisted CVD with said carbon source concentration set to a second level higher than said first level and in the range of 0.3% to 1.0%wherein said homoepitaxial diamond thin film exhibits near-band-gap emission at room temperature.