Electrode preconditioning method for a plating bath monitoring process

US5324400A · kind A · utility

Assignee

• Hughes Aircraft Company · US

Inventors

• Bruce M. Eliash · Los Angeles, US
• Nguyet H. Phan · Los Angeles, US
• Frank A. Ludwig · Homberg (Efze), DE
• Vilambi NRK Reddy · Cranbury, US

Key dates

• Filing date: Dec 4, 1992
• Grant date: Jun 28, 1994
• Expiry date: Dec 4, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/38
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of preconditioning an electrode for use in a plating bath monitoring process. The method involves applying at least one anodic signal to an electrode in contact with the plating bath solution in order to yield a reproducibly clean and stabilized electrode surface, and then applying a plating signal to deposit a layer of metal on the anodically treated electrode. The resultant preconditioned electrode improves the accuracy and precision of subsequent voltammetric monitoring measurements for a variety of different plating baths. The method is easily integrated with and thereby enhances the capabilities of known voltammetric plating bath monitoring processes.