Patent ID: 9041102
Filing Date: 2015-05-26
Classification: H01L

Abstract:
1. A lateral transistor, comprising: a semiconductor layer of a first conductivity type; a source region of a second conductivity type opposite to the first conductivity type in the semiconductor layer; a drain region of the second conductivity type in the semiconductor layer separated from the source region; a first well region of the second conductivity type surrounding the drain region and separated from the source region; a thin gate dielectric layer positioned atop the semiconductor layer between the source region and the first well region and extending atop a first portion of the first well region; a thick field dielectric layer positioned atop a second portion of the first well region between the drain region and the thin gate dielectric layer, wherein the thick field dielectric layer is thicker than the thin gate dielectric layer; a gate positioned atop a first portion of the thin gate dielectric layer near the source region side; a field plate overlying at least a portion of the thick field dielectric layer and extending atop a second portion of the thin gate dielectric layer, wherein the field plate is electrically isolated from the gate by a gap overlying a third portion of the thin gate dielectric layer, and wherein the gap is filled with a dielectric material, and wherein the field plate is electrically coupled to the source region; and a shallow lightly doped region of the first conductivity type located in the first well region underneath the gap and the third portion of the thin gate dielectric layer.