Patent ID: 11929288
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 8:
9. A device comprising:
first semiconductor layers disposed over a substrate, wherein the first semiconductor layers are separated from each other and are stacked up along a direction generally perpendicular to a top surface of the substrate, wherein a topmost first semiconductor layer from the first semiconductor layers extends to a first height above the substrate;
second semiconductor layers disposed over the substrate, wherein the second semiconductor layers are separated from each other and are stacked up along the direction generally perpendicular to the top surface of the substrate, wherein a topmost second semiconductor layer from the second semiconductor layers extends to the first height above the substrate, the topmost second semiconductor layer having a different material composition than the topmost first semiconductor layer;
a first gate structure wrapping around each of the first semiconductor layers; and
a second gate structure wrapping around each of the second semiconductor layers.