Patent ID: 11948793
Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 16:
17. A method for making a field effect transistor, comprising:
providing a graphene nanoribbon composite structure comprising a substrate and a plurality of graphene nanoribbons spaced apart from each other, wherein the substrate comprising a plurality of protrusions spaced apart from each other, and one of the plurality of graphene nanoribbons is on the substrate and between two adjacent protrusions; and a method for making the graphene nanoribbon composite structure comprising:
growing a graphene film on a growth substrate;
placing an adhesive layer on a surface of the graphene film away from the growth substrate;
removing the growth substrate, and cleaning with water or an organic solvent;
combining the graphene film, the adhesive layer, and the substrate; and drying, so that a plurality of wrinkles are formed near the plurality of protrusions, to obtain a first composite structure; wherein the first composite structure comprises the substrate, the graphene film, and the adhesive layer; and the graphene film is between the adhesive layer and the substrate;
removing the adhesive layer to obtain a second composite structure comprising the substrate and the graphene film, wherein the graphene film is located on the substrate; and
etching from a surface of the graphene film away from the substrate, to remove the graphene films except for the plurality of wrinkles; and

placing an interdigital electrode on the graphene nanoribbon composite structure, wherein the interdigital electrode covers the plurality of protrusions and is electrically connected to the plurality of graphene nanoribbons.