Patent ID: 11935920
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A device comprising:
a first source/drain region;
a second source/drain region;
a contact etch stop layer having a horizontal portion between the first source/drain region and the second source/drain region;
an inter-layer dielectric over the contact etch stop layer, the inter-layer dielectric having a first relative permittivity;
a first source/drain contact extending through the inter-layer dielectric, the first source/drain contact connected to the first source/drain region;
a second source/drain contact extending through the inter-layer dielectric, the second source/drain contact connected to the second source/drain region; and
an isolation feature between the first source/drain contact and the second source/drain contact, the isolation feature contacting a first sidewall of the first source/drain contact and a second sidewall of the second source/drain contact, the isolation feature contacting the horizontal portion of the contact etch stop layer, the isolation feature having a second relative permittivity, the second relative permittivity being less than the first relative permittivity.