Patent ID: 6758955
Filing Date: 2004-07-06
Classification: C25D,G01N

Abstract:
A method for measuring electroplating potentials of a metal plating solution comprising the steps of:(a) providing a measuring apparatus comprising a reference electrode, a test electrode, and electrical potential measuring circuitry electrically coupled between said reference electrode and said test electrode for measuring electrical potential therebetween, wherein said test electrode is coated by a metal layer previously deposited thereon; (b) preparing a metal plating solution for measurement; (c) stripping the metal layer from the test electrode and cleaning said test electrode; (d) contacting the test electrode with the prepared metal plating solution, allowing said test electrode to come to an equilibrium state in said prepared metal plating solution; (e) depositing metal onto said test electrode from the prepared metal plating solution, by electroplating at a constant or known current density; and (f) measuring and recording electroplating potential between the reference electrode and the test electrode during the electroplating process; (g) optionally, repeating steps (b)-(f) for each metal plating solution to be measured.