Below is a question about solderability of electroless nickel. ______________________________ Forward Header __________________________________ Subject: Analysis Author: Edwin Louis at cmd-cs4-cc-p Date: 7/10/98 3:52 AM Dan, here is the message I was trying to send to Peter. ______________________________ Forward Header __________________________________ Subject: Analysis Author: Edwin Louis at cmd-cs4-cc-p Date: 7/10/98 3:03 AM Peter we have some electroless nickel on aluminum in which some times you can solder to it with Sn63 and RMA flux and other times you cannot. Some people have suggested that there are various plating types per various specs. that incorporate higher or lower amounts of phosphorus. The high phosphorus containing plating presumedly do not solder as well as the lower content plating. Another difference I understand is that sometimes there are impurities of organics that interfere with the soldering or perhaps heavy metal impurities that interfere with solderability. We would like to analyze and compare the two types of plating for these impurities. What do you suggest and for how many dollars? It appears after conversation with Dan Sostak that perhaps Auger would be best because phosphorus probably migrates to the surface as do organics. Because of the surface soldering process the culprits are probably on the surface. As far as trace included organics are co ncerned, will microscopic FTIR fit the bill? I would appreciate some guidance from you on this matter. ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################