Patent ID: 9073173
Filing Date: 2015-07-07
Classification: B24B

Abstract:
1. A method for shape modification of a polishing pad for polishing a workpiece into a desired surface shape, comprising: a measurement step of measuring a polishing pad shape in a state of being attached to a plate by using a polishing pad shape measuring apparatus, wherein the polishing pad shape measuring apparatus comprises a computing apparatus, the computing apparatus has data showing the relationship between the polishing pad shape and a shape of the workpiece polished by the polishing pad, and the shape of the polished workpiece is estimated from the measurement result of the measurement step and a comparison to the data showing the relationship between the polishing pad shape and a finished shape of the workpiece polished by the polishing pad; a condition determination step of selecting a dressing recipe capable of dressing the polishing pad to allow the polishing pad to polish the workpiece into the desired surface shape from a plurality of pre-provided dressing recipes based on the measurement result of the measurement step; and a shape modification step of dressing the polishing pad by using the dressing recipe determined in the condition determination step.