Patent ID: 7648914
Filing Date: 2010-01-19
Classification: H01L

Abstract:
1. A method for etching a substrate within a processing chamber, comprising: injecting a processing gas from a top of the processing chamber in a direction substantially normal to and in a direction substantially parallel to a surface of the substrate, respectively; determining a distribution of etch by-products across the surface of the substrate by verifying a flux of species to the surface of the substrate; determining a substrate temperature target profile that corresponds to a uniform deposition rate of etch by-products on the substrate; correlating the distribution of etch by-products across the surface of the substrate to the substrate temperature target profile; preferentially regulating a temperature of a first portion of a substrate support relative to a second portion of the substrate support to obtain the substrate temperature target profile on the substrate; and etching the substrate on the preferentially regulated substrate support.