Patent ID: 7988875
Filing Date: 2011-08-02
Classification: C03C,C23C,H01L

Abstract:
1. A method for processing a substrate, comprising: depositing a first silicon-containing material layer having a first etch rate on the substrate surface from a silicon-containing precursor and a nitrogen-containing precursor, the nitrogen-containing precursor introduced into a processing chamber at a first flow rate; depositing a second silicon-containing material layer having a second etch rate different than the first etch rate on the first silicon-containing material layer from the silicon-containing precursor and the nitrogen-containing precursor, the nitrogen-containing precursor having a second flow rate different than the first flow rate; etching the first silicon-containing material layer and the second silicon-containing material layer; and forming a taper etch profile in the first silicon-containing material layer and the second silicon-containing material layer.