Patent ID: 7507587
Filing Date: 2009-03-24
Classification: C23C,G01N,Y10T

Abstract:
1. An automatic analysis and control method for measuring the concentration of a metallic component in an electroless composite plating solution, comprising: measuring transmissivity or absorbance of at least two different wavelengths as measured values of said electroless composite plating solution disposed in an absorbance cell, wherein said at least two different wavelengths includes a first wavelength and a second wavelength in the condition that the concentration of said metallic component in said electroless composite plating solution is fixed, and the concentration of a composite material in said electroless composite plating solution is varied; obtaining the following relational equation from the relationship between the absorbance (A measuring transmissivities or absorbances at said first wavelength and said second wavelength in the condition that the concentration of said metallic component in said electroless composite plating solution is varied, and said concentration of said composite material in said electroless composite plating solution is varied; obtaining the following relational equation from the relationship between a κ value and said concentration of said metallic component, M =γκ−δ, where M is the concentration of said metallic component in said electroless composite plating solution, κ is the absorbance at said first wavelength minus the product of α, obtained in the first equation, multiplied by the absorbance at said second wavelength, and γ, δ are coefficients; and measuring said absorbances at said first and second wavelengths to obtain the concentration of said metallic ion from said relational equation M =γκ−δ.