Patent ID: 7884035

Claim:
A method of PECVD depositing an a-SiN x :H gate dielectric film, to provide an increase in film density and film thickness uniformity across a substrate surface area larger than 100 cm×100 cm, while maintaining an atomic % of SiH bonded structure of less than about 15%, said method comprising: providing said substrate having a surface area larger than 100 cm×100 cm within a PECVD processing chamber; and depositing said a-SiN x :H gate dielectric film over said substrate from a precursor gas composition including N 2 , NH 3 , SiH 4 , and H 2 , wherein H 2 is provided to said processing chamber in an amount such that a component ratio of NH 3 :H 2 in said plasma precursor gas composition ranges from about 0.5:1 to about 3:1.