Patent ID: 11955526
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 15:
16. A method comprising:
forming a nanosheet stack on a substrate, wherein the nanosheet stack is comprised of a plurality of alternating layers of Si and SiGe 30%;
processing a first portion of the alternating layers of Si and SiGe 30% to form a thick gate oxide nanosheet device;
processing a second portion of the alternating layers of Si and SiGe 30% to form a thin gate oxide nanosheet device, wherein forming thin gate oxide nanosheet device comprises thinning each Si layer of the second portion of the nanosheet stack, wherein each thinned layer of Si has a varying thickness across the horizontal axis, wherein the thinnest section of each layer of Si is located at the center of the horizontal axis for each layer of Si;
forming a spacer layer in contact with each of the layers of Si of the thin gate device; and
forming an oxide layer in contact with each of the layers of Si of the thin gate device.