▎ 摘　　要

NOVELTY - Producing graphene, comprises: (A) providing a substrate (10); (B) optionally forming a metal layer (11) on the substrate; (C) providing a carbon source to form a carbon-containing layer on the metal layer; and (D) performing a treatment on the carbon-containing layer by low-frequency electromagnetic wave to form graphene layers on a surface of the metal layer and between the metal layer and the substrate, where the low frequency electromagnetic wave is provided by a microwave generator, and graphene layers are formed from carbon atoms of the carbon-containing layer to receive kinetic energy. USE - The method is useful for producing graphene (claimed), which is used in flexible units. ADVANTAGE - The method energy efficiently enables the large-scale production of graphene with high operational stability in a cost effective manner, short processing time, and easy-to-control processing temperature. DETAILED DESCRIPTION - Producing graphene, comprises: (A) providing a substrate; (B) optionally forming a metal layer on the substrate; (C) providing a carbon source to form a carbon-containing layer on the metal layer; and (D) performing a treatment on the carbon-containing layer on the metal layer by low-frequency electromagnetic wave to form graphene layers on a surface of the metal layer and between the metal layer and the substrate, where the low frequency electromagnetic wave is provided by a microwave generator, and the graphene layers are formed from carbon atoms of the carbon-containing layer to receive kinetic energy by converting electromagnetic energy from the microwave field device into thermal energy through a microwave absorber as a media to directly heat the carbon-containing layer. DESCRIPTION OF DRAWING(S) - The figure shows a sectional schematic view of the preparation process flow of graphene layers. Substrate (10) Metal layer (11) Backward graphene layer (141) Forward graphene layer. (142)