Patent ID: 7816283

Claim:
A method of depositing a high permittivity dielectric film, the method comprises: forming an SiO 2 layer over a silicon substrate by heat treatment; nitriding a specific metal element (A) to form a nitride film (A x N y ) on the SiO 2 layer, wherein said specific metal element (A) and nitrogen (N) in said nitride film (A x N y ) have a predetermined fraction relationship between x and y, wherein a reactive sputtering method is used for the nitride film deposition such that metal (A) atoms from a metal target are sputtered in a nitrogen atmosphere; and annealing said nitride film in an oxygen atmosphere to form said dielectric film (AON) which is oxidized and nitrided, wherein the annealing is at a temperature of 400-1000° C., such that the oxidizing and annealing occur at the same time, wherein the entire annealing process is carried out in an oxygen atmosphere, wherein said specific metal element (A) and nitrogen (N) in said nitride film (A x N y ) have a relationship that y is smaller than its stoichiometric value throughout the entire nitride film, wherein the high permittivity dielectric film is a gate dielectric layer.