RBP Chemical Technology has introduced Layer Clean NP, a new acid, nonchelating, nonchloride cleaner that contains no phosphates. The company reports that the cleaner removes chromate conversion coating, fingerprints and oxides from copper laminate. When used prior to photoresist lamination, it reportedly reduces imaging defects by improving photoresist adhesion. Available in both spray and soak applications, the product provides claimed quick cleaning at low concentrations, is non-etching and suitable for use with very thin copper foils, and with a formula that cleans at low concentration.

rbpchemical.com