Patent ID: 8119538
Filing Date: 2012-02-21
Classification: H01L

Abstract:
1. A method of making a semiconductor structure, comprising: forming a dielectric charge storage layer on a semiconductor substrate; forming a dielectric layer on the dielectric storage layer by high density plasma (HDP) oxidation, wherein the forming of the dielectric layer results in a thinning of the dielectric charge storage layer to less than a predetermined first thickness through oxidization of a portion of the dielectric charge storage layer; measuring the thickness of the dielectric charge storage layer, and if the measured thickness exceeds the predetermined first thickness repeating the forming of the dielectric layer and removing a portion of the dielectric layer removing at least a portion of the dielectric layer to thin the dielectric layer to less than a predetermined second thickness; and measuring the thickness of the dielectric layer, and if the measured thickness exceeds the predetermined second thickness repeating the removing a portion of the dielectric layer.