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

Claim 15:
16. The method of claim 10, further comprising:
forming a sacrificial gate stack above the first portion of channel layer, the second portion of the channel layer extending outwards from the sacrificial gate stack, the channel layer being located between shallow trench isolation regions;
depositing a first spacer material above the second portion of the channel layer, the sacrificial gate stack and the shallow trench isolation regions;
etching the first spacer material to form the first spacer;
epitaxially growing the source/drain regions off the second portion of the channel layer;
epitaxially growing a sacrificial cap off the source/drain regions, a first portion of the sacrificial cap being adjacent to the first spacer and a second portion of the sacrificial cap being above the shallow trench isolation regions;
recessing the first spacer, a portion of the first spacer remains on a bottom region of the sacrificial gate stack;
depositing a sacrificial spacer above the sacrificial gate stack, the first spacer, the sacrificial cap and the shallow trench isolation regions, wherein a thickness of the sacrificial spacer is less than a thickness of the first spacer;
recessing the sacrificial spacer to expose top portions of the sacrificial cap and top portions of the sacrificial gate stack;
depositing a first dielectric layer above the sacrificial spacer and the exposed top portions dielectric cap; and
replacing the sacrificial gate stack with the metal gate stack.