Patent ID: 11894443
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method of making a semiconductor device comprising:
depositing a TiN layer over a substrate;
doping a first portion of the TiN layer using an oxygen-containing plasma treatment;
doping a second portion of the TiN layer using a nitrogen-containing plasma treatment, wherein the second portion of the TiN layer directly contacts the first portion of the TiN layer;
forming a first metal gate electrode over the first portion of the TiN layer, wherein the first metal gate electrode has a variable width in a direction parallel to a top surface of the substrate; and
forming a second metal gate electrode over the second portion of the TiN layer, wherein the second metal gate electrode directly contacts the first metal gate electrode.