Patent ID: 7785672

Claim:
A method of improving film deposition uniformity of a PECVD deposited silicon nitride-comprising passivation dielectric film and obtaining a breakdown voltage of about 5 MV/cm or higher over a substrate surface having an equivalent radius of about 0.5 meter or greater, the method comprising: providing a substrate surface having an equivalent radius of about 0.5 meter or greater within a PECVD processing chamber; supplying a plasma source gas comprising NH 3 , SiH 4 , N 2 , and H 2 , where the ratio of NH 3 :SiH 4 ranges from about 5.6 to about 11.1, where the ratio of N 2 :SiH 4 ranges from about 5.8 to about 20.8, and wherein an amount of H 2 added to the plasma source gas is controlled so that the amount of H 2 does not exceed 30 volume % of the total gas flow to said processing chamber, whereby film uniformity across said substrate surface varies by less than about 10%, and a breakdown voltage of said silicon nitride-comprising passivation dielectric film does not fall below about 5 MV/cm.