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US 2003/0143753 A1Published application
Analysis of antioxidant in solder plating solutions using molybdenum dichloride dioxide
AssigneeAdvanced Technology Materials, Inc.
InventorsMackenzie E. King, Cory Schomburg, Monica K. Hilgarth
Life of this patent
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Abstract
The present invention relates to antioxidant analysis for solder plating solutions, by using a complexing solution comprising a molybdenum compound, such as MoO2Cl2, to form a highly colored antioxidant-molybdenum complex, which can be detected and analyzed by UV-Vis spectroscopic, as a basis for concentration determination for the antioxidant.
Claims12
A method for determining concentration of antioxidant in a sample solder plating solution, comprising the steps of:
- (a) providing a complexing solution comprising at least one molybdenum compound;
- (b) adding the sample solder plating solution into said complexing solution, so as to form an antioxidant-molybdenum complex that is detectable by UV-Vis spectroscopy;
- (c) conducting UV-Vis absorption analysis at a wavelength that maximizes UV absorbance of said antioxidant-molybdenum complex;
- and
- (d) determining the antioxidant concentration in said sample solder plating solution, based on the UV-Vis absorption analysis result.
2 more elements
A system for measuring concentration of antioxidant in a sample solder plating solution, comprising:
- (a) a fluid compartment containing a complexing solution comprising at least one molybdenum compound;
- (b) a sample solution inlet for introducing the sample solder plating solution into the complexing solution contained by said fluid compartment, so as to form therein an antioxidant-molybdenum complex that is detectable by UV-Vis spectroscopy;
- (c) a UV-Vis spectrometer constructed and arranged for conducting absorption analysis of said antioxidant-molybdenum complex, at a wavelength that maximizes UV absorbance thereof;
- and
- (d) a computational device connected with said UV-Vis spectrometer, for determining the antioxidant concentration in said sample solder plating solution, based on the UV-Vis absorption analysis result.
2 more elements
Dependencies are inferred from the claim text.