Apparatus for electrodepositing a metallic layer of predetermined thickness

US4287043A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Werner Eckert · Waldshut-Tiengen, DE
• Wolfgang Simon · Wuppertal, DE

Key dates

• Filing date: Feb 13, 1980
• Grant date: Sep 1, 1981
• Expiry date: Feb 13, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D21/12
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An apparatus for electrodepositing a layer of predetermined layer thickness has an anode supplied with DC voltage by a converter device. A programmable computer having inputs for the desired value of the layer thickness and for technological parameters, such as anode index and area factor, cyclically sums the current charge as the integral of current from digitized sampling values of the anodes current and determines therefrom the actual value of the layer thickness. When the desired thickness value is reached, the converter device is disconnected.