Patent ID: 9388050
Filing Date: 2016-07-12
CPC Classification: B82Y,C01B

Claim Text:
1. A production method for graphene thin film comprising the steps of: (a) injecting a graphene oxide solution in a direction of an obtuse or acute angle between a substrate placed in parallel with a reciprocating linear motion device and a deposition plate connected to the reciprocating linear motion device and in contact with the substrate; (b) using the reciprocating linear motion device to put the deposition plate connected to the reciprocating linear motion device into reciprocating linear motion while the deposition plate is in contact with the substrate, thereby applying the graphene oxide solution onto the substrate; (c) preparing the graphene oxide solution, prior to the step (a); (d) pretreating the substrate, prior to the step (a); and (e) reducing the substrate coated with the graphene oxide solution using a reducing agent, after the step (b); wherein the acute angle between the substrate and the deposition plate is 10° to 60°, wherein a volume of the graphene oxide solution injected in the step (a) is 5 μl to 100 μl per inch (length) of a contact interface between the substrate and the deposition plate, wherein a concentration of the graphene oxide solution injected in the step (a) is 0.1 mg/ml to 10 mg/ml, wherein a reciprocating linear motion speed of the deposition plate in the step (b) is 1 mm/s or greater, wherein a reciprocating coating frequency of the graphene oxide solution in the step (b) is 1 to 100.