Patent ID: 8753896

Claim:
A method of controlling concentration of a diluted surfactant fluid within a desired dilution ratio prior to application of the diluted surfactant fluid to a microelectronic component during manufacture of the microelectronic component comprising: creating a diluted surfactant fluid by combining a surfactant and a carrier fluid prior to application of the diluted surfactant fluid to the microelectronic component, wherein the surfactant is capable of fluorescence; sampling the diluted surfactant fluid prior to application of the diluted surfactant fluid to the microelectronic component; creating a conditioned sample b further diluting the sampled diluted surfactant fluid; measuring the fluorescence of the surfactant in the conditioned sample; correlating the measured fluorescence of the surfactant in the conditioned sample with the concentration of the surfactant in the sampled diluted surfactant fluid; and if the correlation in the previous step indicates that the sampled diluted surfactant fluid is not within the desired dilution ratio, taking action to adjust the concentration of the surfactant in the diluted surfactant fluid so the fluid is within the desired dilution ratio prior to application of the diluted surfactant fluid to the microelectronic component; and if the correlation in the previous step indicates that the sampled diluted surfactant fluid is within the desired dilution ratio, applying the diluted surfactant fluid onto the microelectronic component.