▎ 摘　　要

NOVELTY - Film comprises graphene layer (12), an alumina layer (14) laminated on the graphene layer, and aluminum layer (16) laminated on the alumina layer. USE - Film. ADVANTAGE - The film has high X-ray-transmission rate, and ensures intensity, strength and heat resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for producing a film, which involves: (A) preparing a metal substrate on which a graphene layer is formed; (B) forming an alumina layer on the graphene layer; (C) forming an aluminum layer on the alumina layer; and (D) removing the metal substrate by etching. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of an film. Support mesh (6) Support frame (8) Graphene layer (12) Alumina layer (14) Aluminum layer (16)