Patent ID: 7208426

Claim:
A method for preventing plasma induced damage resulting from high density plasma deposition processes, said method comprising the steps of: a) depositing Un-doped Silica Glass (USG) over a semiconductor substrate having structures formed thereon so as to form a USG liner that overlies said structures; b) depositing silicon-rich oxide over said USG liner so as to form a silicon-rich liner that directly overlies said USG liner wherein said USG liner and said silicon-rich liner have a combined thickness less than 800 angstroms; c) performing a high density plasma deposition process, said silicon-rich oxide liner preventing damage resulting from plasma charge to said structures during said high density plasma deposition process; and d) tuning an oxygen to SiH 4 gas ratio and a source RF power to achieve a desired reflectivity of said silicon-rich oxide liner, deposited without bias RF power.