Patent ID: 8475674
Filing Date: 2013-07-02
Classification: H01J,H01L

Abstract:
1. A method of etching a silicon-containing layer on a substrate in a substrate processing region of a substrate processing chamber, the method comprising: flowing a fluorine-containing precursor and a hydrogen-containing precursor into a remote plasma region fluidly coupled to the substrate processing region while forming a plasma in the plasma region to produce plasma effluents; and etching the silicon-containing layer by flowing the plasma effluents into the substrate processing region while maintaining the substrate at a processing temperature between about 60° C. and about 95° C.; and pausing the flow of the plasma effluents into the substrate processing region to allow accumulated solid residue to sublimate and then restarting the flow of the plasma effluents to continue etching the same silicon-containing layer with a renewed etch rate at the processing temperature between about 60° C. and about 95° C.