Patent ID: 8974655
Filing Date: 2015-03-10
Classification: B23H,C25F,H01L

Abstract:
1. A method of removing a material from a surface, comprising: providing a substrate comprising a metallic material thereover, the metallic material having a surface, the metallic material comprising lone or more materials selected from the group consisting of Ti, Ta, Pt, Pd, Ru, Mo, W, Ir, Rh, Os, Ag, Au and mixtures thereof, optionally comprising trace elements; contacting the metallic surface with a polishing pad; applying a voltage directly to the substrate to remove material from the metallic surface; and changing the voltage during the removing material from the metallic surface; the method including a low passivation process followed by a first high passivation process, followed by a high removal process, followed by a second high passivation process.