Patent ID: 7704897

Claim:
A method of depositing a multi-layer film on a substrate positioned within a processing chamber, the method comprising: growing a first lining layer comprising predominantly silicon dioxide by forming a high density plasma from a process gas comprising a silicon source and an oxygen source while maintaining a mean pressure within the chamber of about 15 mTorr or less and maintaining a mean substrate temperature of 500° C. or less; growing a second lining layer comprising predominantly silicon oxynitride over the first lining layer by forming a high density plasma from a process gas comprising a silicon source, an oxygen source and a nitrogen source while maintaining a mean pressure within the chamber of about 15 mTorr or less and maintaining a mean substrate temperature of 500° C. or less, wherein a deposition-to-sputter ratio during growth of the second lining layer is at least 50:1; growing a bulk gap-fill layer comprising predominantly silicon oxynitride over the second lining layer by forming a high density plasma from a process gas comprising a silicon source, an oxygen source and a nitrogen source while maintaining a mean pressure within the chamber of about 15 mTorr or less and maintaining a mean substrate temperature of 500° C. or less, wherein a deposition-to-sputter ratio during growth of the bulk gap-fill layer is between about 2:1 and 6:1; wherein each of the high density plasmas formed to grow the first lining layer, the second lining layer and the bulk gap-fill layer has a density of 10 11 ions/cm 3 or greater.