Patent ID: 11894276
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A method, comprising:
providing a structure having a first channel member and a second channel member over a substrate, wherein the first channel member is located in a first region of the structure and the second channel member is located in a second region of the structure;
forming a first oxide layer over the first channel member and a second oxide layer over the second channel member;
forming a first dielectric layer over the first oxide layer and a second dielectric layer over the second oxide layer;
forming a capping layer over the second dielectric layer but not over the first dielectric layer; and
performing an annealing process while the first dielectric layer is exposed to increase a thickness of the second oxide layer under the capping layer.