Patent ID: 7115516

Claim:
A method of thin film deposition, comprising: positioning a substrate having high aspect ratio features in a deposition chamber; providing a gas mixture to the deposition chamber, wherein the gas mixture comprises one or more process gases for depositing material on the substrate and one or more chemical etch species for chemically etching material deposited on the substrate; and depositing a material layer on the substrate from the gas mixture at a temperature less than about 450° C., wherein the one or more chemical etch species in the gas mixture selectively removes portions of the material layer deposited adjacent to the high aspect ratio features while depositing the material layer, wherein the one or more chemical etch species are provided to the chamber through one or more orifices capable of directing such one or more chemical etch species in a collimated manner toward the substrate, and wherein the one or more orifices move relative to the substrate at a rate greater than about 0.1 cm/min.