Patent ID: 6551933
Filing Date: 2003-04-22
Classification: B24B

Abstract:
A method of finishing a tracked semiconductor wafer having a semiconductor wafer surface and a finishing cycle time, the method comprising the steps of:providing the tracked semiconductor wafer having tracked information; providing an abrasive finishing element finishing surface; providing an organic lubricant to an operative finishing interface comprising the interface formed between the abrasive finishing element finishing surface and the semiconductor wafer surface; providing a finishing control subsystem having: at least three operative process sensors which include a plurality of operative friction sensors for sensing in situ process information; access to the tracked information; and a processor to evaluate the in situ process information and the tracked information; applying an operative finishing motion in the operative finishing interface forming in the operative finishing interface a uniform region having an organic lubrication and wherein the uniform region has a coefficient of friction; and changing a plurality of control parameters in response to an evaluation of both the in situ process information sensed with the at least three operative process sensors and the tracked information and wherein changing the control parameters changes the coefficient of friction in the uniform region having the organic lubrication during at least a portion of the finishing cycle time.