Patent ID: 6965145

Claim:
A semiconductor device comprising: a substrate region; a source region formed in the substrate region; a drain region formed in the substrate region and separated from the source region by a channel region; a first gate overlaying a first portion of the channel and separated therefrom via a first insulating layer; and a second gate overlaying a second portion of the channel and separated therefrom via a second insulating layer, wherein said first portion of the channel and said second portion of the channel do not overlap, wherein said first insulating layer is an oxide layer, wherein said second insulating layer further comprises a first oxide layer formed over said channel region, a first nitride layer formed over said first oxide layer of the second insulating layer, and a second oxide layer formed over said first nitride layer, and wherein said first oxide layer of the first insulating layer is thinner than the first oxide layer of the second insulating layer wherein said first gate extends partially over the second gate.