Patent ID: 6905556

Claim:
A method of delivering a reagent to a wafer, comprising: providing a solvent; providing a set of conditions of temperature and pressure to the solvent sufficient to bring the solvent to supercritical conditions; providing a reagent; providing a surfactant, wherein the surfactant has a first moiety with an affinity for the solvent and a second moiety with an affinity for the reagent, wherein the surfactant increases the concentration of the reagent carried in the solvent; combining the solvent, the surfactant, and the reagent to form a solution; and delivering the solution to a supercritical process chamber, wherein the wafer is exposed to the solution in the supercritical process chamber, where the reagent acts to chemically break down material to accomplish removal of the material from the wafer, wherein the solution is supercritical when entering the supercritical process chamber.