Hi Jack, I believe that the condition I am seeing is crazing. Crazing is a separation between glass fibers and epoxy. It is a site for conductive anodic filament (CAF) growth. I have seen boards with this condition fail due to shorting. This may not pass "HiPot" testing. We see crazing frequently in lead free applications. If the crazing violates your minimum spacing requirements I believe it is rejectable. I would bring this condition to a material review board (MRB) for disposition. Sincerely, Paul Reid Program Coordinator PWB Interconnect Solutions Inc. 235 Stafford Rd., West, Unit 103 Nepean, Ontario Canada, K2H 9C1 613 596 4244 ext. 229 Skype paul_reid_pwb [log in to unmask] <mailto:[log in to unmask]> -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson Sent: Monday, April 28, 2008 11:03 PM To: [log in to unmask] Subject: [TN] Blue Voids Greetings! Once again I am caught in the middle of a bare board problem, (never the same thing twice!) Maybe after a few more decades of failure I might become more proficient at evaluation, but in the meantime.... Does anyone have a quick reaction to this picture? http://frontdoor.biz/PCBportal/bluevoid.jpg I'm told there are voids in the glass fiber bundles. When I reported it to the manufacturer, they asked that blue dye be applied to see the penetration. It all looks blue! (and other areas look "bluer" than the problem area to me) The description in IPC-A-600 is too brief to comprehend and I can't find anything in Printed Circuits Handbook about it. anyway, I'm not doubting anything I've been told by "the experts", my question is: How would you handle this if you saw it in YOUR report? reject? use the boards but ask for corrective action? process indicator but not really a problem? not sure, but monitor with more xsec? onward thru the fog, Jack --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------