Patent ID: 9627492
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a semiconductor substrate having a first conductivity type; an epitaxial layer having a second conductivity type on the semiconductor substrate; an isolation area in the epitaxial layer to define an active area of the semiconductor substrate; a body area having a first conductivity type and a drift area having a second conductivity type, the body area and the drift area being adjacent to each other in the epitaxial layer; a local oxidation of silicon (LOCOS) insulating layer in the drift area, side and lower surfaces of the LOCOS insulating layer being surrounded by the drift area; a drain area adjacent to a side part of the LOCOS insulating layer, side and lower surfaces of the drain area being surrounded by the drift area; a body contact area and a source area in the body area, side and lower surfaces of the body contact area and the source area being surrounded by the body area; and a gate area overlapping the drift area and a part of the LOCOS insulating layer from a direction of the body are, wherein the gate area includes a plurality of bar shaped portions extending from the direction of the body area, the bar shaped portions being spaced apart from each other, and a portion of the LOCOS insulating layer being exposed between the spaced bar shaped portions.