Sam, are you talking PWBs or PWAs? Either way I would hope that there isn't any significant amount of trapped moisture in the boards. If boards are baked at 225F for 2-4 hours before being vacuum sealed, there should'nt be any problems with moisture. I would add a bag of dessicant and a humidity card to the packaging just for good measure. David N. Girard, CQE, NCE Product Assurance Engineer Group Technologies Corporation (813) 972-6471 > ---------- > From: sam mccorkel[SMTP:[log in to unmask]] > Sent: Friday, October 31, 1997 12:15 > To: [log in to unmask] > Subject: [TN] Fab: Packaging > > We have a customer that wants us to begin using vaccuum sealed > wrapping to ship their boards in. They want to reduce moisture > absorbtion in > the board. > > It's been awhile, but I remember reading that this is a > "No-No". I > don't remember WHY but I think it had to do with trapped moisture. > > Could anyone let me know if this is or isn't recommended and > also why? > > Thanks for your input! > > ############################################################## > 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. > For the technical support contact Dmitriy Sklyar at [log in to unmask] or > 847-509-9700 ext.311 > ############################################################## > ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################