Patent ID: 9200379
Filing Date: 2015-12-01
Classification: C30B

Abstract:
1. A method for producing a single crystal diamond substrate comprising at least the steps of: preparing a single crystal SiC substrate; heteroepitaxially growing a first film on an entire upper surface of the prepared single crystal SiC substrate, the first film being a MgO film that is used as a separation layer; heteroepitaxially growing a second film on an upper surface of the first film, the second film being an iridium film or a rhodium film; heteroepitaxially growing a single crystal diamond on an upper surface of the second film to obtain a laminated structure comprising the single crystal SiC substrate, the first film, the second film, and the heteroepitaxially grown single crystal diamond; and separating the heteroepitaxially grown single crystal diamond from the upper surface of the second film to obtain the single crystal diamond substrate; wherein the step of separating comprises: