Patent ID: 9309598
Filing Date: 2016-04-12
CPC Classification: C23F,H01J,H01L

Claim Text:
1. A method of etching metal from a substrate, the method comprising: flowing a hydrogen-containing precursor into a first substrate processing region housing the substrate while forming a plasma in the first substrate processing region to treat a thin metal oxide layer formed on a metal layer; flowing a halogen-containing precursor into a second substrate processing region, wherein the second substrate processing region is plasma-free during the flowing of the halogen-containing precursor; flowing a carbon-and-nitrogen-containing precursor into the second substrate processing region, wherein the second substrate processing region is plasma-free during the flowing of the carbon-and-nitrogen-containing precursor and flowing of the carbon-and-nitrogen-containing precursor occurs after flowing the halogen-containing precursor; and removing at least a portion of the metal layer from the substrate.