Patent ID: 8906456

Claim:
A method, comprising: positioning a substrate such that a surface of the substrate faces a first one of a plurality of cavities of a chamber body, the plurality of cavities of the chamber body being separate from one another; delivering a first process gas into the first cavity via an inlet disposed in a wall of the first cavity and evacuating the first process gas from the first cavity via an outlet disposed in the wall of the first cavity so as to deposit a first layer on the substrate; positioning the substrate such that the surface of the substrate faces a second one of the plurality of cavities of the chamber body; delivering a purge gas into the second cavity via an inlet disposed in a wall of the second cavity and evacuating the purge gas from the second cavity via an outlet disposed in the wall of the second cavity; and delivering an inert gas into a gap between a first surface of the chamber body and a first surface of a susceptor, the first surface of the chamber body and the first surface of the susceptor being parallel to one another, so as to (i) prevent the first process gas in the first cavity from entering the second cavity through the gap, and (ii) prevent the purge gas in the second cavity from entering the first cavity through the gap.