Patent ID: 7448942
Filing Date: 2008-11-11
Classification: B24B,B24D

Abstract:
1. A polishing method for a polishing target having a plurality of surface portions of different curvatures using resilient abrasive members each having a dome-shaped portion, the resilient abrasive members being of a plurality of types having the dome-shaped portions of different curvatures, comprising the steps of: selecting more than two of the resilient abrasive members according to the surface shape of the surface to be polished and having a plurality of surface portions of significantly different curvatures; and polishing the surface to be polished having plurality of surface portions of significantly different curvatures by the use of the selected resilient abrasive members, wherein the plurality of resilient abrasive members each is assigned to one of a plurality of divisions corresponding to the predetermined curvatures, and the step of selecting includes selecting a resilient abrasive member having a curvature which corresponds to the curvature of the assigned division prior to the step of polishing a curvature of the surface to be polished having a plurality of surface portions of significantly different curvatures; and the plurality of divisions are provided by dividing the surface to be polished having a plurality of surface portions of significantly different curvatures, having the plurality of curvatures according to the curvature ranging from the largest curvature to the smallest curvature.