Patent ID: 7335941
Filing Date: 2008-02-26
Classification: H01L

Abstract:
1. A split gate for a flash device comprising: a substrate; an electronic-trapping region comprising an electronic-trapping layer overlying said substrate with a first dielectric layer therebetween; a control gate region comprising a conductive layer, a first part comprising a first end of the control gate region and a second part comprising a second end of the control gate region, the first end being an opposing end from the second end along an axis substantially parallel to a major surface of the substrate, wherein the first part completely overlies said electronic-trapping region with a second dielectric layer therebetween and wherein the second part does not overlie said electronic-trapping region but does overlie said substrate with an oxygen-containing layer therebetween, wherein the oxygen-containing layer has a thickness at least as great as a sum of a thickness of the first dielectric layer and the electronic-trapping region; and spacers overlying the substrate and adjacent to the first end and the second end of the control gate region.