Patent ID: 11876117
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor structure, comprising:
a gate structure located adjacent to a source/drain region;
a spacer structure located between the gate structure and the source/drain region, the spacer structure including a top spacer and a bottom spacer, the top spacer including an airgap having a bottom portion that is wider than a top portion, wherein the wider bottom portion of the airgap is located between the gate structure and the source/drain region; and
a contact structure above the source/drain region, the contact structure including a contact liner above the source/drain region and a contact metal above the contact liner, wherein the top spacer comprises a non-conformal dielectric material that pinches-off a space located above the bottom spacer between the contact structure and the gate structure for forming the airgap.