Patent ID: 8410474

Claim:
A substrate having a graphene film grown thereon, comprising: a base substrate; a patterned aluminum oxide film formed on the base substrate, the patterned aluminum oxide film having a composition of Al 2−x O 3+x (where x is 0 or more), a desired circuit pattern of the patterned aluminum oxide film being formed on the base substrate, no aluminum oxide film bein disposed on the base substrate in regions other than the desired circuit pattern; and a graphene film preferentially grown directly and only on the patterned aluminum oxide film, the graphene film having one or more graphene atomic layers, the graphene film growing parallel to a surface of the patterned aluminum oxide film, the graphene film consisting of a plurality of graphene domains having an average size from 25 to 41 nm, the graphene film having an electrical conductivity of 1×10 4 S/cm or more measured by a four-probe resistive method using an inter-voltage-probe distance of 0.2 mm.