Patent ID: 11908930
Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A structure for a laterally-diffused metal-oxide-semiconductor device, the structure comprising:
a semiconductor substrate;
a drift well in the semiconductor substrate;
a source region and a drain region in the semiconductor substrate;
a gate dielectric layer on the semiconductor substrate;
a buffer dielectric layer on the semiconductor substrate over the drift well, the buffer dielectric layer including a first side edge adjacent to the drain region, a second side edge that abuts the gate dielectric layer, a first section extending from the second side edge to the first side edge, and a plurality of second sections extending from the second side edge toward the first side edge, the first section having a first thickness, and each of the second sections having a second thickness less than the first thickness; and
a gate electrode laterally positioned between the source region and the drain region, the gate electrode including a first portion that overlaps with the buffer dielectric layer and a second portion that overlaps with the gate dielectric layer,
wherein the plurality of second sections of the buffer dielectric layer alternate with portions of the first section of the buffer dielectric layer along the second side edge.