Patent ID: 11929326
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method, comprising:
receiving a workpiece that includes:
a first contact feature in a first dielectric layer,
a second dielectric layer over the first contact feature and the first dielectric layer,
a seed metal layer comprising a via portion and a line portion disposed over the via portion, wherein the via portion extends through the second dielectric layer to couple to the first contact feature and a portion of the line portion is disposed directly over a portion of the second dielectric layer, and
a third dielectric layer disposed over the line portion and the second dielectric layer;

depositing an amorphous carbon layer over the seed metal layer and the third dielectric layer; and
after the depositing of the amorphous carbon layer, annealing the workpiece to form a graphene layer between the seed metal layer and the third dielectric layer, between the seed metal layer and the second dielectric layer, and between the seed metal layer and the first contact feature.