Patent ID: 8926854
Filing Date: 2015-01-06
Classification: B29B,B29K,B82Y,C01B,H01L,Y10T

Abstract:
1. A roll-to-roll doping method of a graphene film, comprising: doping the graphene film by passing the graphene film through a doping solution containing a dopant or dopant vapor using a roll-to-roll process; forming a layered structure including a substrate-graphene film-first flexible substrate from the graphene film formed on a substrate and the first flexible substrate in contact with the graphene film by a first roller unit; immersing the layered structure in an etching solution and passing the layered structure through the etching solution by using a second roller unit to remove the substrate from the layered structure and to transfer the graphene film on the first flexible substrate at the same time; and transferring the graphene film transferred on the first flexible substrate on a second flexible substrate by using a third roller unit, wherein the graphene film is doped by a fourth roller unit by passing the graphene film through the doping solution containing a dopant or a dopant vapor after transferring the graphene film on the first flexible substrate or after transferring the graphene film on the second flexible substrate, wherein the graphene film is manufactured by a chemical vapor deposition method.