Patent ID: 6764552
Filing Date: 2004-07-20
Classification: B08B,C11D,G03F,H01L

Abstract:
A method of removing waste material from a semiconductor wafer, the method comprising:(a) receiving the semiconductor wafer in a chamber; (b) dissolving a reagent into a supercritical solvent to create a supercritical solution; and (c) providing the supercritical solution to the chamber to thereby contact at least one surface of the wafer and remove at least a portion of the waste material from the semiconductor wafer; wherein the reagent facilitates removal of the material, and wherein the reagent comprises at least one of an ammonium bicarbonate prepared ahead of time, prior to contact with the supercritical solvent, and an ammonium carbonate prepared ahead of time, prior to contact with the supercritical solvent.