Patent ID: 9355863
Filing Date: 2016-05-31
CPC Classification: H01J,H01L

Claim Text:
1. A method of etching a substrate in a substrate processing region of a substrate processing chamber, wherein the substrate has an exposed titanium oxide region, the method comprising: flowing a fluorine-containing precursor into a remote plasma region fluidly coupled to the substrate processing region while forming a remote plasma in the remote plasma region to produce plasma effluents, wherein the remote plasma region is separated from the substrate processing region by a showerhead; flowing a nitrogen-and-hydrogen-containing precursor into the substrate processing region without first passing the nitrogen-and-hydrogen-containing precursor through the remote plasma region, wherein the nitrogen-and-hydrogen-containing precursor is flowed through channels in the showerhead that allow it to flow to the substrate processing region and prevent flow to the remote plasma region; and etching the exposed titanium oxide region with the combination of the plasma effluents and the nitrogen-and-hydrogen-containing precursor in the substrate processing region.