Patent ID: 11935932
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A device comprising:
a first source/drain region in a semiconductor substrate;
a second source/drain region in the semiconductor substrate;
an inter-layer dielectric over the first source/drain region and the second source/drain region;
a first source/drain contact extending through the inter-layer dielectric, the first source/drain contact connected to the first source/drain region;
a first contact spacer surrounding the first source/drain contact;
a first void disposed between the first contact spacer and the inter-layer dielectric;
a second source/drain contact extending through the inter-layer dielectric, the second source/drain contact connected to the second source/drain region;
a second contact spacer surrounding the second source/drain contact, the second contact spacer and the first contact spacer having a same width; and
a second void disposed between the second contact spacer and the inter-layer dielectric, the second void having a greater width than the first void.