Patent ID: 11929413
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A semiconductor device structure, comprising:
a first channel structure and a second channel structure over a substrate, wherein the second channel structure is longer than the first channel structure;
a first gate stack over the first channel structure, wherein the first gate stack has a first width;
a first gate spacer extending along a sidewall of the first gate stack;
a second gate stack over the second channel structure, wherein the first gate stack has a first work function layer and a first conductive layer, the second gate stack has a second work function layer and a second conductive layer, the first work function layer and the second work function layer are made of a same material, the first conductive layer and the second conductive layer are made of a same material, and the first conductive layer is thicker than the second conductive layer; and
a second gate spacer extending along a sidewall of the second gate stack, wherein the second gate stack has a portion extending along the second gate spacer, the portion of the second gate stack has a second width, and half of the first width is greater than the second width.