Solution a liquid, alkaline, aqueous cleaning circuit panels, a process for preparing a substrate resin for subsequent metalizacao, process for desunter aperfeicoado resin.Process for the cleaning of aperfeicoado perfuracoes, and process to attack the surface of a panel circuit.

摘要

A high concentration aqueous NaMnO4 solution which provides a high etch rate for printed circuit boards and the like. The solution contains NaOH in an amount sufficient to allow the removal of substantially all the manganese residues from the treated substrate by acid neutralization. The solution can be used inter alia for desmearing and etching back.