Patent ID: 11876119
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 10:
11. A method of forming a semiconductor device, comprising:
forming a plurality of channel members over a substrate, the channel members being vertically stacked;
forming a dielectric fin having a sidewall facing end portions of the channel members;
forming a gate structure engaging each of the channel members and interfacing the sidewall of the dielectric fin;
removing the substrate, thereby forming a first trench exposing a bottom surface of the gate structure;
depositing a first dielectric layer in the first trench;
after the depositing of the first dielectric layer, forming a second trench exposing a bottom surface of the dielectric fin;
removing the dielectric fin, thereby exposing a sidewall of the gate structure in the second trench;
partially removing the gate structure, thereby increasing a volume of the second trench; and
depositing a second dielectric layer in the second trench.