Patent ID: 6790768
Filing Date: 2004-09-14
Classification: B24B,H01L

Abstract:
A method for processing a substrate, comprising:positioning a substrate having a conductive material formed thereon in a polishing apparatus having one or more rotational carrier heads and one or more rotatable platens, wherein the carrier head comprises a retaining ring and a membrane for securing a substrate in the carrier head and the platen has a polishing article disposed thereon; contacting the substrate surface with the polishing article at a ratio of retaining ring contact pressure to membrane pressure of greater than about 1.1:1, wherein the membrane pressure is about 2 psi or less; and polishing the substrate to remove conductive material from the substrate, wherein polishing the substrate comprises polishing the substrate at a ratio of carrier head rotational speed to platen rotational speed of between about 2:1 and about 12:1.