Patent ID: 9331195
Filing Date: 2016-05-03
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a substrate having first, second, and third regions, the first and second regions having different doping polarities and being separated by the third region, the third region having the same doping polarity as the second region and a lower dopant concentration level than the second region, wherein a portion of the substrate is interposed between an edge of the first region and an edge of the third region, wherein the portion of the substrate has the same doping polarity as the first region, wherein the portion of the substrate is different than the first region and is between a top surface of the substrate and the first region, wherein the first region extends into the third region within the substrate; a source formed in the substrate and over the first region, the source and the first region having different doping polarities; a drain formed in the substrate and over the second region, the drain and the second region having the same doping polarity; and a gate formed over a portion of the third region, the gate being formed closer to the source than to the drain.