Patent ID: 9493678
Filing Date: 2016-11-15
CPC Classification: C09G,H01L

Claim Text:
1. A polishing composition for polishing a silicon-germanium alloy substrate, comprising: abrasive particles; a compound selected from the group consisting of vanadium pentoxide and sodium metavanadate, for carrying out a catalytic reaction and an oxidation reaction directly to the silicon-germanium alloy substrate; and a carrier solvent, wherein a content of the abrasive particles is in a range from 0.01 wt % to 5 wt %, and a content of the compound having hexavalent molybdenum or pentavalent vanadium is in a range from 0.01 wt % to 1.0 wt %; wherein the polishing composition further comprises an anionic additive, and a content of which is in a range from 0.01 wt % to 0.2 wt %; wherein the polishing composition further comprises a halogen oxides compound of salts thereof, and a content of the halogen oxides compound or salts thereof is in a range from 0.05 wt % to 5 wt %; and wherein a static etching rate of the silicon-germanium substrate is 0 Å/min.