So here's the deal: They have two large circular pads (like about .750") that they use as battery contacts. He says that this is the place that he has corrosion risk. I can't tell if the corrosion risk is from battery leakage or environmental effects. Anyway, he says that corrosion significantly impacts the battery life. ralph David Hillman wrote: > Hi Ralph! Can you provide more information on what the customer > considers/experienced "corrosion" and what type of use environment he/she > was talking about? > > Dave Hillman > Rockwell Collins > [log in to unmask] > > Ralph Richart <[log in to unmask]>@IPC.ORG> on 06/08/2000 11:55:26 AM > > Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond > to Ralph Richart <[log in to unmask]> > > Sent by: TechNet <[log in to unmask]> > > To: [log in to unmask] > cc: > > Subject: [TN] still confused > > We have answers.... > > So I had a long talk with my customer this morning to provide input > based on the invaluable advice from you all. > > I said - "is there a specific reason for choosing 3-8u" of immersion > gold over tin/lead solder?" > He said - "absolutely, the gold provides corrosion resistance, the gold > does not" > I said - "even such a thin amount - only 3-8u"?" > He said - "definitely, all we need is the coverage, the thickness is > irrelevant" > > Is this true? > > Needless to say, we are rebuilding the parts as we speak. Rework sounds > difficult to say the least, although I may try to come up with some > scheme for fun as they have a bunch of boards that are no good right > now. > > thanks for all the help..... > > ralph > > ############################################################## > TechNet Mail List 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://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## TechNet Mail List 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://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################