Fast criterion for through hole ability of black hole agent used for flexible printed circuit board

摘要: The invention discloses a quick judging method for the perforating ability of black hole agent used flexible printed circuit board (PCB), which is characterized in comprising following steps: (1) wetting sheet qualitative filter paper and adhering hopper, (2) placing along with hopper on an Erlenmeyer flask wet internal wall, (3) filtering through straight rod smooth surface collecting flask, (4) recording time by use chronograph, observing speed at dispersed upwards wall (5) dipping dripping paper, situations around after setting time. By full agent, filtrate diffused as well whether separate water spots appear, has advantages detecting precipitation appears time, accurately determining normal, remarkably reducing open-cell copper defect rate subsequent electroplating step, markedly enhancing quality reliability FPC products.