Patent ID: 9343272
Filing Date: 2016-05-17
CPC Classification: H01J,H01L

Claim Text:
1. A method of etching a patterned substrate, the method comprising: ion implanting the patterned substrate, wherein ion implanting the patterned substrate comprises ion implanting an exposed bottom portion of a gap in a silicon oxide layer on the patterned substrate, wherein the exposed bottom portion and an exposed sidewall portion of the gap each comprise silicon oxide; flowing a fluorine-containing precursor into a remote plasma region fluidly coupled to a substrate processing region by way of a showerhead while forming a remote plasma in the remote plasma region to produce plasma effluents; flowing a hydrogen-and-oxygen-containing precursor into the substrate processing region without first passing the hydrogen-and-oxygen-containing precursor through the remote plasma region, wherein the hydrogen-and-oxygen-containing precursor comprises an O—H bond; combining the plasma effluents with the hydrogen-and-oxygen-containing precursor in the substrate processing region to etch the exposed bottom portion more rapidly than the exposed sidewall portion.