Patent ID: 11967647
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 10:
11. A method for forming a semiconductor device, comprising:
forming a field effect transistor (FET) device over a substrate, the FET device comprising a nanostructure channel suspended from the substrate, a gate structure surrounding the nanostructure channel, and source/drain structures adjacent to the nanostructure channel;
forming a first dielectric layer over the substrate to surround the gate structure;
depositing a second dielectric layer over the gate structure and the first dielectric layer;
forming conductive plugs within the first dielectric layer and the second dielectric layer to contact the source/drain structures;
forming a patterned light blocking layer over the second dielectric layer to cover the gate structure, while exposing top surfaces of the conductive plugs, wherein the patterned light blocking layer is in direct contact with a top surface of the second dielectric layer;
irradiating the conductive plugs and the patterned light blocking layer with a laser radiation to activate dopants in portions of the source/drain structures underlying the conductive plugs;
removing the conductive plugs after the irradiation; and
forming source/drain contact structures within the first and second dielectric layers to contact the source/drain structures.