▎ 摘　　要

NOVELTY - A highly-oriented pyrolytic graphite substrate (HOPG) (100) is prepared. A catalyst layer (101) is formed on the obtained substrate, heated for specified time, and cooled to obtain graphene film (102). USE - Manufacture of graphene film used for ultra high-speed sensor, actuator and transparent element. ADVANTAGE - The method efficiently provides graphene film having uniform size by simple method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for substrate having graphene film. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view explaining the transfer process of graphene film. (Drawing includes non-English language text) Highly-oriented pyrolytic graphite substrate (100) Catalyst layer (101) Graphene film (102)