McGean-Rohco launches fast electroless level-tin system

Circuit World

ISSN: 0305-6120

Article publication date: 1 March 2000




(2000), "McGean-Rohco launches fast electroless level-tin system", Circuit World, Vol. 26 No. 1.



Emerald Group Publishing Limited

Copyright © 2000, MCB UP Limited

McGean-Rohco launches fast electroless level-tin system

McGean-Rohco launches fast electroless level-tin system

Keywords McGean-Rohco, Tin plating

The latest new product to be introduced from the recently launched Electronic Products Division of McGean-Rohco is an electroless tin plating solution, designed to benefit the PCB and SMT fabricator alike by reducing (eliminating) solderability problems.

Branded Roplate ET-50, the new solution, is a stable, simple to use system capable of producing a uniform deposit on copper and copper alloy surfaces of 1.5 to 2.5 microns of tin. It offers fast immersion times, measured against alternative chemistry, and is relatively inexpensive compared to electroless nickel/gold and organo silver. High throughputs can be achieved in a conveyorised operation. Roplate ET-50 can also be used in traditional vertical process lines.

Used at a slightly elevated temperature to produce a deposit of 1 micron or better, it does not contain any sulphuric acid, while removing lead from the manufacturing process in line with current global environmental policy for the new century. This eliminates the heavy, corrosive filming found in other electroless tin solutions and does not attack solder mask or resists. It also inhibits the growth of inter-metallic layering by producing a flat dense deposit retaining good, long term solderability (more than 12 months) and problem-free use as an etch resist in alkaline etchants.

Two other unique benefits are a much longer bath life when using Roplate ET-50 and the elimination of dangerous powdered thiourea additions. This new chemistry means that waste treatment costs are likely to be simpler and lower than competitive systems. For further information, please contact: McGean-Rohco (UK) Ltd. Tel: +44 (0)1902 456563; Fax: +44 (0)1902 457443; E-mail:

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