Dear Technet, Fact or Fiction? Being a relic of military electronics assembly, I have always dealt with ceramic-encased microcircuits. As we're starting to look at plastic encapsulated microcircuits (PEMs), some new assembly considerations arise. One that we (technet) have covered lately is the moisture absorption, which I can understand. Another concern that my folks are telling me is that these PEMs are subject to corrosion when soldered with rosin-based fluxes, even the RMA types, regardless of cleaning processes. Other no-clean or water soluble fluxes are ok. I am having trouble with this one. Can anyone support or deny this notion? Thanks Ralph ################################################################ 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 ################################################################