Patent ID: 8043907

Claim:
A method for fabricating a non-volatile memory device on a substrate, comprising: depositing a first polysilicon layer on a substrate surface; depositing a silicon oxide layer on the first polysilicon layer; depositing a first silicon oxynitride layer on the silicon oxide layer; depositing a silicon nitride layer on the first silicon oxynitride layer; depositing a second silicon oxynitride layer on the silicon nitride layer; and depositing a second polysilicon layer on the second silicon oxynitride layer, wherein the depositing the second silicon oxynitride layer further comprises: depositing a silicon oxide material on the silicon nitride layer; heating the substrate containing the silicon oxide material to a temperature of about 900° C. or higher during a post deposition annealing process; implanting nitrogen into the silicon oxide material during a plasma nitridation process; and heating the substrate containing the silicon oxide material implanted with the nitrogen to a temperature of about 900° C. or higher during a post nitridation annealing process.