Patent ID: 11888062
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A structure for an extended-drain metal-oxide-semiconductor device, the structure comprising:
a semiconductor substrate comprising a first semiconductor material;
a first well in the semiconductor substrate;
a second well in the semiconductor substrate, the second well adjoining the first well along an interface;
a source region and a drain region in the semiconductor substrate, the source region positioned in the first well, and the drain region positioned in the second well;
a semiconductor layer positioned on the semiconductor substrate, the semiconductor layer comprising a second semiconductor material that differs in composition from the first semiconductor material, and the semiconductor layer having an edge that is approximately aligned with the interface;
a gate electrode positioned in a lateral direction between the source region and the drain region, the gate electrode including a first section positioned on a first portion of the semiconductor layer and a second section positioned on the semiconductor substrate; and
a gate dielectric including a first portion in direct contact with the first portion of the semiconductor layer and a second portion in direct contact with the semiconductor substrate, the first portion of the gate dielectric positioned in a vertical direction between the first section of the gate electrode and the first portion of the semiconductor layer, and the second portion of the gate dielectric positioned in the vertical direction between the second section of the gate electrode and the semiconductor substrate,
wherein the first portion of the semiconductor layer is positioned in the vertical direction between the first well and the first section of the gate electrode.