If specimens acn be put into a SEM/EDX system, you can at least get an elemental suggestion of what it is... > -----Original Message----- > From: [log in to unmask] [SMTP:[log in to unmask]] > Sent: Wednesday, August 12, 1998 2:39 PM > To: [log in to unmask] > Subject: [TN] Unidentified Material Between Conductors > > All, > > We are having some problems with a backplane PCB. There appears to be > some sort > of material bridging some conductors under the conformal coat on the > solder side > of the PCB. > > The material appears in various colors, but mostly appear as a > blue-green to > black color. This material is also conductive (which is how we found > the > problem.....the unit failed electrical test). > > The boards are not subjected to any environmental stresses prior to > discovering > this problem. > > Any hints or suggestions?? E-Mail me for additional information > (Photo's will > also be available soon). > > > Steve > [log in to unmask] > > ################################################################ > 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 > ################################################################ > ################################################################ 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 ################################################################