Patent ID: 11888048
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A semiconductor device, comprising:
first and second nanosheet FET devices positioned on a semiconductor substrate, each of the first and second nanosheet FET devices respectively including a plurality of first channel members and a plurality of second channel members above the semiconductor substrate, a first gate structure and a second gate structure, a first source region and a second source region, and a first drain region and a second drain region;
wherein a number of the plurality of first channel members is greater than a number of the plurality of second channel members;
wherein the second nanosheet FET device includes an oxide layer having one or more oxide segments, the one or more oxide segments disposed between adjacent ones of the plurality of second channel members, between the second gate structure and the semiconductor substrate, and between the second gate structure and the second source and second drain regions;
wherein a second channel member that is closest to the semiconductor substrate among the plurality of second channel members is spaced farther from a top surface of the semiconductor substrate than a first channel member that is closest to the semiconductor substrate among the plurality of first channel members;
wherein the second nanosheet FET device further includes a plurality of dielectric spacers disposed between the one or more oxide segments and the second source and second drain regions; and
wherein a portion of the one or more oxide segments contacts at least one of the second source and second drain regions.