Patent ID: 8588956
Filing Date: 2013-11-19
Classification: B24B

Abstract:
1. A computerized method for calculating an amount of material removed from a workpiece during a polishing process on a polishing system comprising: receiving at a computer system a set of polishing properties; calculating, by the computer system, a set of kinematic values for a lap and a workpiece of a polishing system based at least in part on the set of polishing properties; calculating, by the computer system, a time of exposure for a set of lap points on the workpiece based at least in part on the set of polishing properties and the set of kinematic values; calculating, by the computer system, a friction force between the lap and the workpiece from at least a portion of the set of polishing properties; calculating, by the computer system, a slope between the lap and the workpiece based on a moment force between the lap and the workpiece, wherein the moment force is based on the friction force; calculating, by the computer system, a pressure distribution between the lap and the workpiece based on information for a lap type included in the set of polishing properties; calculating, by the computer system, a cumulative pressure distribution between the lap and the workpiece based on the slope, the pressure distribution for the lap type, and the time of exposure; and calculating, by the computer system, an amount of material removed from the workpiece based on the cumulative pressure distribution, the friction force, and the set of kinematic values.