▎ 摘　　要

NOVELTY - The processing method involves providing first crystalline ferromagnetic metal surface and then performing CVD to grow graphene film on the first crystalline ferromagnetic metal surface. A second ferromagnetic film is deposited on the graphene film. The first crystalline ferromagnetic metal surface is made from nickel-iron alloy while the second ferromagnetic film is made from iron. USE - Processing method for making graphene spin filter device (claimed) by CVD. ADVANTAGE - Makes spin filter device having spin filtering effect that is used to electrically determine the magnetization of the second ferromagnetic layer which lies on one side of the graphene film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene spin filter device.