▎ 摘　　要

NOVELTY - Preparation of multi-layer graphene thin film comprises forming polymeric support layer on metal layer, growing on surface of graphene film, dissolving polymer support layer/graphene film attached to metal layer, doping by doping solution, covering polymer support layer/graphene film to another graphene film growing on surface of metal layer, dissolving polymer support layer/graphene film attached to metal layer, doping by doping solution, covering polymer support layer/graphene film to substrate, removing polymer support layer, and forming multi-layers of graphene thin film on substrate. USE - Method for preparing multi-layer graphene thin film (claimed). ADVANTAGE - The method repeatedly uses polymer support layer, and avoids polymer residue between graphene layers. DESCRIPTION OF DRAWING(S) - The drawing shows a process flow diagram of preparation of multi-layer graphene thin film (Drawing includes non-English language text).