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

Claim 9:
10. A semiconductor device, comprising:
at least one nanosheet transistor structure disposed on a semiconductor substrate, the at least one nanosheet transistor structure including:
a first nanosheet stack having a plurality of first channel layers;
a first source region and a first drain region;
a first metal gate disposed about the at least one nanosheet transistor structure; and
an oxide layer disposed relative to the first metal gate, the oxide layer comprising one or more segments disposed between the first metal gate and the first source and first drain regions; and
a second nanosheet transistor structure disposed on the semiconductor substrate, the second nanosheet transistor structure including a second nanosheet stack having a plurality of second channel layers;
wherein a first channel layer that is closest to the semiconductor substrate among the plurality of first channel layers is spaced farther from a top surface of the semiconductor substrate than a second channel layer that is closest to the semiconductor substrate among the plurality of second channel layers;
wherein the first nanosheet stack further includes a plurality of dielectric spacers disposed between the one or more segments of the oxide layer and the first source and first drain regions; and
wherein a portion of the one or more segments of the oxide layer contacts at least one of the first source and first drain regions.