Patent ID: 9676966
Date: 2017-06-13
CPC Classifications: C09G,H01L

Claim:
1. A method of polishing a semiconductor substrate, which comprises: a) providing a semiconductor substrate having at least one of a metal film, a shallow trench isolation film, or a dielectric film; b) providing a slurry composition comprising: a metal oxide particle, a first water-soluble organic polymer having a first average molecular weight between 26,000 and 50,000, a second water-soluble organic polymer having a second average molecular weight that is between 15% to 95% of the first molecular weight, and water, wherein said polishing slurry composition is disposed between the substrate and a polishing pad; and c) holding a portion of the pad and the substrate in a position to create a polishing pressure and moving at least one of the polishing pad or substrate to obtain a relative movement rate between the polishing pad and the substrate, thereby polishing a semiconductor substrate to effect a substrate removal rate; said method characterized in that when the substrate is polished by contacting the substrate with the slurry composition disposed between the substrate and a polishing pad moving relative to the substrate, the relationship between the substrate removal rate compared with the movement of the pad relative to the substrate while maintaining a constant polishing pressure between the polishing pad and the substrate exhibits a maximum in the substrate removal rate.