Patent ID: 9617638
Date: 2017-04-11
CPC Classifications: C23C,H01L

Claim:
1. A method of depositing a film of material on a semiconductor substrate in a processing chamber, the method comprising: (a) flowing a film precursor into the processing chamber; (b) adsorbing the film precursor onto a substrate in the processing chamber, such that the precursor forms an adsorption-limited layer on the substrate; (c) removing at least some unadsorbed film precursor from the volume surrounding the adsorbed precursor by purging the processing chamber with a primary purge gas; and (d) reacting adsorbed film precursor while a secondary purge gas is flowed into the processing chamber, after removing unadsorbed precursor with the primary purge gas in (c), to form a film layer on the substrate; wherein the secondary purge gas comprises a chemical species having an ionization energy and/or a disassociation energy equal to or greater than that of O 2 .