Environment-friendly Pd free surface activation technics for ABS surface

► The ABS surfaces were etched by H2SO4-MnO2 colloid. ► With absorption and a reduction by a dimethylamineborane solution, copper particles were deposited on the ABS surface, which serves as a catalyst replacement for SnCl2/PdCl2 colloid. ► The adhesion strength between the ABS surface and the electroless copper film were investigated.