Patent ID: 9378969
Filing Date: 2016-06-28
CPC Classification: H01J,H01L

Claim Text:
1. A method of etching a patterned substrate, the method comprising: transferring the patterned substrate into a substrate processing region of a substrate processing chamber, wherein the patterned substrate has exposed portions of carbon-containing material and an exposed alternative material, wherein the carbon-containing material is silicon-free and wherein the exposed alternative material consists of one of exposed silicon, exposed silicon nitride, exposed silicon carbon nitride, exposed silicon carbide or exposed silicon oxide; flowing an oxygen-containing precursor into a remote plasma region fluidly coupled to the substrate processing region; flowing a fluorine-containing precursor into the remote plasma region; combining the oxygen-containing precursor with the fluorine-containing precursor; forming a remote plasma in the remote plasma region from the oxygen-containing precursor and the fluorine-containing precursor to produce plasma effluents; passing the plasma effluents through an ion suppressor and subsequently into the substrate processing region; and etching the exposed portions of carbon-containing material, wherein the substrate processing region is devoid of ionic species during the etching.