Research On Multivariate Regression Analysis Of Nickel Plating Parameter And Thickness Of Electroplating Forecasting

Thickness of electroplating is one of the key factors of affecting the quality of deposit. There are different effects on electroplating efficiency and deposition velocity by every processing parameter in the producing process of electroplating. The production mode of Electronics industry is the production of small quantity and multi times. The consistency quality from batch to batch is difficult to control. The objective of this thesis is to apply the multivariate regression method to the nickel electroplating efficiency and thickness forecasting, forecasting thickness of nickel plating through analyzing the factors of affecting efficiency of electroplating, with improving of the stability of quality, and decreasing the cost of production; to enhance the quality, the competition and the profitability of products.The thesis studies the electroplating processing parameters on electroplating efficiency and forecasting the thickness in nickel plating. First of all, there is an introduction of the effect of all processing parameters on nickel plating process and the common research method in plating process, DOE and multivariate regression analysis method. Secondly, quality status in plating process is introduced, the effect of single factors such as concentration of nickel, pH value and current density on electroplating efficiency are studied respectively in actual production status, and next the regression equation of the effect that pH value and current density on electroplating efficiency is built in the paper with DOE and multivariate regression method. The results show that influence of the pH value on the electroplating efficiency is stronger than that of the current density; and forecasting the thickness in nickel plating; and the conformance of forecasting parameter and the parameter in actual manufacturing process is good. That is to say, this calculation method provides a method for forecasting the thickness of electrodeposits. and a calculation program is designed to calculate processing parameters; the key factors of controlling the quality is the stability of processing parameters. Finally, This paper proposed an idea that automatic control is the development direction of future plating process.