Patent ID: 9214333
Filing Date: 2015-12-15
Classification: C23C,H01L

Abstract:
1. A method for depositing a SiN film having a reduced wet etch rate on a semiconductor substrate in a processing chamber, the method comprising: (a) adsorbing a film precursor onto a semiconductor substrate in a processing chamber such that the film precursor forms an adsorption-limited layer on the substrate, the film precursor comprising Si; (b) removing at least some unadsorbed film precursor from the volume surrounding the adsorbed film precursor; (c) after removing unadsorbed film precursor in (b), reacting the adsorbed film precursor by exposing it to a plasma comprising N-containing ions and/or radicals to form a SiN film layer on the substrate; (e) densifying the SiN film layer by exposing it to a plasma comprising He for between 0.5 and 15 seconds, the plasma comprising He having a power density relative to the substrate surface of between about 0.035 and 2.2 W/cm (g) repeating (a), (b), (c), and (e) to form another densified SiN film layer on the substrate.