Patent ID: 9691612
Date: 2017-06-27
CPC Classifications: B82Y,C01B,C23C,C30B,H01L

Claim:
1. A process for preparing graphene on a SiC substrate, based on metal film-assisted annealing, comprising the following steps: (1) subjecting a SiC substrate to a standard cleaning process so as to remove contaminants from the surface of the SiC substrate; (2) placing the cleaned SiC substrate into a quartz tube and heating the quartz tube up to a temperature of 750 to 1150° C.; and introducing CCl (3) forming a metal film with a thickness of 350 to 600 nm on a Si substrate by electron beam deposition, wherein the metal film is capable of catalyzing carbon to reconstitute into graphene; (4) placing the obtained double-layered carbon film sample onto the metal film, and subsequently annealing them in an Ar atmosphere at a temperature of 900 to 1100° C. for 10-30 minutes so as to reconstitute the double-layered carbon film into double-layered graphene; and (5) removing the metal film from the double-layered graphene, and thereby obtaining double-layered graphene.