Patent ID: 11942557
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 8:
9. A semiconductor nanosheet device comprising:
a stack of isolation layers on top of a substrate, the stack of isolation layers comprising a first dielectric layer, a second dielectric layer, and a third dielectric layer stacked in order one atop another, the first dielectric layer and the third dielectric layer having identical composition;
a stack of semiconductor channel layers directly on the stack of isolation layers and stacked one above another; and
work function metal layers between and separating each semiconductor channel layer of the stack of semiconductor channel layers, wherein a width of the work function metal layers is less than a width of the stack of semiconductor channel layers, wherein vertical side surfaces of the semiconductor channel layers are vertically aligned with vertical side surfaces of the third dielectric layer, wherein a combined thickness of the first dielectric layer, the second dielectric layer and the third dielectric layer is approximately the same as a thickness of the work function metal layers between each semiconductor channel layer of the stack of semiconductor channel layers.