Patent ID: 11901220
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for forming a semiconductor device, comprising:
forming a gate structure and a source/drain (S/D) contact on a substrate;
depositing a first dielectric material, wherein:
a first portion of the first dielectric material is on a top portion of an L-shaped sidewall spacer of the gate structure; and
a second portion of the first dielectric material is on a top portion of an etch stop layer of the S/D contact;

depositing a second dielectric material, wherein:
a first portion of the second dielectric material is on the first portion of the first dielectric material and on the L-shaped sidewall spacer of the gate structure; and
a second portion of the second dielectric material is on the second portion of the first dielectric material and on the etch stop layer of the S/D contact, wherein depositing the second dielectric material continues until the first and second portions of the second dielectric material are in contact with one another; and

performing an oxygen treatment process on the deposited second dielectric material.