Patent ID: 6361402
Filing Date: 2002-03-26
Classification: B24B,H01L

Abstract:
A method for polishing an object having a layer of photoresist, the method comprising:a) applying a layer of slurry on an a layer of photoresist on an object having a first and a second side, the slurry comprising an abrasive, an acid and an additive, the abrasive selected from the group consisting of silica, alumina, ceria TiO2 and combinations thereof; the acid selected from the group consisting of phosphoric acid, acetic acid, sulfuric acid, boric acid, nitric acid and combinations thereof; and the additive selected from the group consisting of poly(acrylic) acids having a molecular weight of at least about 400 and at most about 400,000, the layer of photoresist on one of the first and second side, the object having a center axis perpendicular to the first and second side; b) contacting the layer of slurry with a pad having a first and second side, the first side of the pad exerting a force on the slurry.