Patent ID: 8227069
Filing Date: 2012-07-24
Classification: B82Y,C01B,C30B,Y10S,Y10T

Abstract:
1. A graphene/SiC composite material having at least one graphene layer formed on an SiC single crystal substrate, said graphene/SiC composite material being produced according to a process comprising the steps of: removing an oxide film that is formed by natural oxidation and which covers a surface of the SiC single crystal substrate, thereby exposing an Si surface of the SiC single crystal substrate, heating the SiC single crystal substrate with the Si surface exposed under an oxygen atmosphere, thereby forming an SiO heating the SiC single crystal substrate under vacuum on which the SiO wherein the at least one graphene layer is formed on the SiC single crystal substrate, wherein the at least one graphene layer has a region that is flat at an atomic level and that has a diameter of at least 1 μm or more, wherein the at least one graphene layer has a region of 20 μm square or more which is free from steps of 1.5 nm or more, and wherein the at least one graphene layer comprises three or more graphene layers, and the three or more graphene layers define an ABC stacking structure.