Patent ID: 11862682
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 11:
12. A semiconductor device, comprising:
a substrate, the substrate including an active region extending in a first direction;
a plurality of channel layers on the active region, the plurality of channel layers disposed in a direction perpendicular to an upper surface of the substrate;
a gate electrode respectively surrounding the plurality of channel layers, the gate electrode extending in a second direction crossing the first direction, the gate electrode including a first portion, a second portion under the first portion, and a third portion under the second portion;
a sidewall of the second portion of the gate electrode being curved, inclined, or both curved and inclined;
a semiconductor cap layer between the first portion of the gate electrode and the second portion of the gate electrode and having a same material as that of each of the plurality of channel layers; and
a source/drain structure disposed on at least one side of the gate electrode and connected to the plurality of channel layers,
wherein the third portion of the gate electrode is disposed below an uppermost channel layer of the plurality of channel layers, the second portion of the of the gate electrode is disposed on the uppermost channel layer of the plurality of channel layers, and the first portion of the gate electrode extends from a first level to a second level higher than the first level,
wherein an upper surface of the source/drain structure is positioned below the first level in a cross-section in the first direction.