Patent ID: 7547951

Claim:
A semiconductor device, comprising: a semiconductor substrate having a first region and a second region; a first well disposed within the first region; a nitrogen-incorporated active region formed within the first region; a first gate dielectric layer formed on the nitrogen-incorporated active region, the first gate dielectric layer including a first dielectric layer and a second dielectric layer, the second dielectric layer including diffused nitrogen from the nitrogen-incorporated active region; a first gate electrode disposed on the first gate dielectric layer; a second well disposed within the second region; an active region that is not a nitrogen incorporated region formed within the second region; a second gate dielectric layer formed on the second region, the second gate dielectric layer including another first dielectric layer; and a second gate electrode formed on the second gate dielectric layer; wherein the first well is a p-well, and the second well is an n-well or p-well, and the first gate dielectric layer has the same thickness as the second gate dielectric layer.