Patent ID: 11942513
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A semiconductor structure, comprising:
a substrate having a front surface;
a first semiconductor layer proximal to the front surface;
a second semiconductor layer over the first semiconductor layer;
a gate having a portion between the first semiconductor layer and the second semiconductor layer;
a spacer between the first semiconductor layer and the second semiconductor layer, contacting the gate and the first semiconductor layer; and
a source/drain (S/D) region, wherein the S/D region is in direct contact with a bottom surface of the second semiconductor layer, wherein an interface between the spacer and the first semiconductor layer comprises:
a first section proximal to the S/D region;
a second section proximal to the gate; and
a third section between the first section and the second section,
wherein an absolute value of a derivative at the third section is greater than an absolute value of a derivative at the second section.