Patent ID: 9401399
Filing Date: 2016-07-26
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising a transistor in a semiconductor substrate including a main surface, the transistor comprising: a source region of a first conductivity type; a drain region of the first conductivity type; a channel region of a second conductivity type; a gate electrode; and a field plate, wherein the source region and the drain region are disposed along a first direction, the first direction is parallel to the main surface, the channel region is disposed between the source region and the drain region, the channel region is patterned into a ridge extending along the first direction by adjacent trenches extending in the first direction in the semiconductor substrate, the gate electrode is disposed in a first one of the trenches adjacent to the channel region, the gate electrode is absent from a second one of the trenches adjacent to the channel region, and the field plate is disposed in field plate trenches which are separate from the trenches.