▎ 摘　　要

NOVELTY - Producing double-layer graphene comprises preparing catalyst substrate, forming a first graphene layer by providing a carbon source on the catalyst substrate, forming a diffusion site in the first graphene layer through plasma sputtering, and forming second graphene layer by providing a carbon source between the first graphene layer and the catalyst substrate through the diffusion site. USE - The graphene is useful in electronic device, barrier materials, heat dissipation materials, and transparent electrodes. ADVANTAGE - The graphene has high carrier mobility, high thermal conductivity, high Young's modulus, and high transparency. The method prevents physical damage and defect generation.