Patent ID: 6602805
Filing Date: 2003-08-05
Classification: H01L

Abstract:
A method for forming nitride read only memory, said a method comprising:providing a substrate; forming a zirconium oxide layer on said substrate by using sputtering method; performing annealing treatment to said zirconium oxide layer; forming a silicon nitride layer on said zirconium oxide layer; forming a silicon oxide layer on said silicon nitride layer; forming a polysilicon layer on said silicon oxide layer; forming a photoresist over said polysilicon layer and defining a gate pattern on said photoresist; etching said polysilicon layer, said silicon oxide layer, said silicon nitride layer, and said zirconium oxide layer to form gate electrode by using said photoresist as a mask; removing said photoresist; forming a spacer on sidewall of said gate electrode; and forming a source and a drain in said substrate.