Diamond semiconductor element and process for producing the same

摘要

A process for producing a diamond thin-film comprises a first process-step of forming a diamond crystal thin-film on a substrate, a second process-step of putting two of said diamond crystal thin-film thus formed in readiness, and a third process-step of firing said two diamond crystal thin-films, superimposed each other such that surfaces of the two diamond crystal thin-films make at least partial contact with each other, under a high pressure under which a diamond is stable.