Patent ID: 8883269

Claim:
A method of depositing a dielectric layer over a substrate, comprising: supporting a substrate in a processing volume of a processing chamber having a microwave source and a gas feeding source disposed in the processing volume, wherein the gas feeding source comprises an array of gas feeding lines arranged parallel and longitudinally spaced from each other at a distance between about 50 mm and about 200 mm; providing a processing gas comprising a silicon-containing precursor and argon gas into the gas feeding source at a gas flow ratio of silicon-containing precursor to argon gas (silicon-containing precursor:argon gas) between about 1:5 and about 1:10; flowing the processing gas from the gas feeding source into the processing volume; generating a plasma from the processing gas in the processing volume by applying a microwave power to an antenna coupled to the microwave source; and depositing a dielectric layer on the substrate in the presence of the plasma using a microwave power having a power density of about 500 milliWatts/cm 2 to about 5,000 milliWatts/cm 2 at a frequency of about 1 GHz to about 10 GHz, wherein the substrate is maintained at a temperature lower than about 200 degrees Celsius during the deposition, and the microwave source comprises one or more linear microwave generators arranged parallel and longitudinally spaced from each other at a distance between about 180 mm and about 350 mm, and wherein the length of the linear microwave generators is about 3 meters.