Jeff, I know this may be a stupid question, but even though the original co./design house etc. doesn't have or won't give up that data, but they are releasing it. They may give you a name of the fab house/houses that made it?? Unless it was a one time buy 10 years ago??? Would think the fab house that made the board might still have data, if co. allows release of it. The fab house should give it up. Problem it may take some time for them to get it to ya, as its not a money maker/priority for them. If you go the route of milling away layers at a time, may want to determine stack up dimensions first, (if controlled bd), this also might help with less milling passes. Good Luck Bob -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Jeff Seeger Sent: Wednesday, August 08, 2007 12:02 PM To: [log in to unmask] Subject: [TN] reverse engineering, legit style , Hallooo, Technet - I've been handed an unusual request, to try and duplicate a PWB from >10 years ago for a resupply type of contract. The OE has officially declined participation and releases to that effect have been obtained. Parts have largely been identified and are mostly sourced. My question is, what manner of tool stands a chance of imaging internal layers? XRay Laminography? A chance to stay in photo methods would sure help keep costs down. Board is reasonably small, 2x5 or so, and thankfully not jammed or superbly advanced for its era. Layer count is at least 6, which would seem appropriate for what I see. However there is one scary marking of 12L off to one corner. If by chance a vendor with expertise happens to be in earshot, I'd love a call. Thanks in advance - one more thing to try and sort out before vacation next week (ain't that the way)! -- Jeff Seeger Applied CAD Knowledge Inc Chief Technical Officer Tyngsboro, MA 01879 jseeger "at" appliedcad "dot" com 978 649 9800 --------------------------------------------------- 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 ----------------------------------------------------- DISCLAIMER: Important Notice ************************************************* This e-mail may contain information that is confidential, privileged or otherwise protected from disclosure. If you are not an intended recipient of this e-mail, do not duplicate or redistribute it by any means. Please delete it and any attachments and notify the sender that you have received it in error. Unintended recipients are prohibited from taking action on the basis of information in this e-mail.E-mail messages may contain computer viruses or other defects, may not be accurately replicated on other systems, or may be intercepted, deleted or interfered with without the knowledge of the sender or the intended recipient. If you are not comfortable with the risks associated with e-mail messages, you may decide not to use e-mail to communicate with IPC. IPC reserves the right, to the extent and under circumstances permitted by applicable law, to retain, monitor and intercept e-mail messages to and from its systems. --------------------------------------------------- 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 -----------------------------------------------------