Patent ID: 9305806
Filing Date: 2016-04-05
CPC Classification: B24B,C09G,C09K,H01L,Y10T

Claim Text:
1. A method of chemical mechanical polishing a removal material of copper or copper-containing material from a surface of a semiconductor substrate comprising steps of: a) providing a polishing pad; b) providing a chemical mechanical polishing slurry composition comprising wherein pH of the polishing slurry composition is between 5.0 to 8.0; and the choline salt having a general molecular structure shown below: wherein anion Y c) contacting the surface of the semiconductor substrate with the polishing pad and the chemical mechanical polishing slurry composition; and d) polishing the surface of the semiconductor substrate; wherein at least a portion of the surface that containing the removal material is in contact with both the polishing pad and the chemical mechanical polishing slurry composition.