In a previous life I was instrumental in switching processes from scrubbing with a compressed wheel to a no-scrub process. I had very little confidence in the quality of the rinsing and drying from the plating process so I installed a clean line that consisted of a four foot, high pressure chamber with citric acid followed by three chambers with cascading water rinse. Each chamber had over 30 psi on fan nozzles. The citric is a fair antitarnish and has the advantage of being cheap. It must be dumped daily to prevent the buildup of bacterial slime. Perhaps the most important part of the process was the high pressure rinsing. This is needed to remove any loose particles of copper from around the edges of the panels. These particles are copper or copper coated, totally opaque to light and and if not removed before the imaging process will ruin yields. > -----Original Message----- > From: Jacob Ransborg [SMTP:[log in to unmask]] > Sent: Wednesday, June 17, 1998 7:05 PM > To: [log in to unmask] > Subject: [TN] Cleaning Process after Electroless copper > Hi technetters > I would like to hear if anybody have experience wtith a cleaning > process of > PCB-boards after plating with electroless copper. Does anybody brush > the > boards or use a chemical treatment etc. > > Regards > Jacob Ransborg > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################