▎ 摘　　要

NOVELTY - A graphene-based sandwich structure heat dissipation film comprises redox graphene layer and chemical vapor deposition graphene layer. The surfaces of both sides of the redox graphene layer are provided with chemical vapor deposition graphene layers. USE - Graphene-based sandwich structure heat dissipation film for semiconductor device (claimed). ADVANTAGE - The heat dissipation film with sandwich structure has excellent heat transfer capability in a direction parallel or perpendicular to the substrate, and can make the substrate or semiconductor device perform rapid and uniform heat dissipation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the heat dissipation film, which involves using chemical vapor deposition method to grow a chemical vapor deposition graphene layer on a metal substrate, preparing a redox graphene layer on the surface of the chemical vapor deposition graphene layer, drying, and rinsing.