Process for the vapor phase synthesis of diamond and highly crystalline diamond

摘要

High quality diamond excellent in crystalline property as well as transparency, can be synthesized at a high growth speed by a process which comprises using, as a raw material gas, a mixed gas of hydrogen gas A, an inert gas B, a carbon atom-containing gas C and an oxygen atom-containing inorganic gas D in such a proportion as satisfying the following relationship by mole ratio: 0.001