Patent ID: 7737097
Filing Date: 2010-06-15
Classification: B08B,C11D,C23G,G03F,H01L

Abstract:
1. A cleaning solution for cleaning a semiconductor substrate, the cleaning solution consisting of: about 0.5 weight percent to about 10 weight percent of a fatty acid dispersed in water; an amount of a base sufficient to bring a pH of the fatty acid water solution to 10.2 or greater to a level where about 50% of the dispersed fatty acid is ionized; a first immiscible component in a liquid phase dispersed in the water; and a second immiscible component in a gas phase dispersed in the water; wherein the cleaning solution is prepared by a process consisting essentially of: adding a fatty acid to water; heating the fatty acid/water solution to a temperature above a melting point temperature of the fatty acid; stirring the mixture to one of disperse or emulsify the fatty acid within the solution; ionizing the fatty acid within the solution while adjusting a pH of the solution to about 10.2; and cooling the ionized fatty acid solution below the melting point temperature of the fatty acid.