Patent ID: 9150417
Filing Date: 2015-10-06
Classification: B82Y,C01B

Abstract:
1. Process for growth of graphene on a silicon carbide substrate by sublimation of silicon from the silicon carbide substrate surface, the process comprising positioning a silicon carbide substrate in a crucible and arranging said crucible in a reaction chamber, controlling the pressure and heating to the growth temperature, growing graphene on the surface of the substrate at a temperature above 1400° C. and at an inert gas pressure of between 600 and 1100 mbar, wherein said heating is conducted in at least a first heating stage and a second heating stage, the first heating stage being conducted at a first heating rate up to a temperature of at least 1200° C., and the second heating stage being conducted after the first heating stage and at a second heating rate which is faster than the first heating rate, wherein inert gas is introduced into the reaction chamber after heating at said first heating rate and prior to heating at said second heating rate.