Patent ID: 9356139
Filing Date: 2016-05-31
CPC Classification: H01L

Claim Text:
1. A device comprising: a substrate; a well of a first impurity type in the substrate; a gate structure over the well; a region of a first conductivity type, formed at a first side of the gate structure; a drift region of a second conductivity type opposite to the first conductivity type, formed at a second side of the gate structure and including a first part extending from a top surface of the substrate to a first depth into the well, a second part underlying the gate structure and extending a second depth less than the first depth from the top surface of the substrate into the well; a source region of the second conductivity type within the region; and a drain region of the second conductivity type within the first part of the drift region, extending a third depth less than the first depth from the top surface of the substrate into the well.