Hi Rick, When they transition your board from cap lam. to foil lam. the shop should do a First Article Inspection (FAI) to validate the process. The FAI should include cross sections to confirm that the dielectric spacing is hitting spec between layers and overall. More generally, I'd want to make sure they have an established process to deal with wrinkles and when that defect scraps a board. Foil wrinkles show up in low pressure areas such as the route lines on multi-board panel. If the resin spots start killing them let me know - I know how to fix that. Boston Brad's got it right sleep soundly cuz foil lam. is A-okay. Besides late nights are the pride & joy of every Lamination Engineer (LOL/JK). Hans AC-130 Gunship Motto: "You can run, but you'll only die tired." ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hans M. Hinners Electronics Engineer Warner Robins - Air Logistics Center (WR-ALC/LUGE) 226 Cochran Street Robins AFB GA 31098-1622 mailto:[log in to unmask] Com: (478) 926 - 5224 Fax: (478) 926 - 4911 DSN Prefix: 468 -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Monday, March 18, 2002 11:05 AM To: [log in to unmask] Subject: [TN] Foil Lamination The call-out on our fab drawings states to use copper clad epoxy laminate FR4 base material. Our supplier in the past has purchased and certified material to IPC-4101. We have now found out they have incorporated foil lamination into their process. What type of requirements should we impose or verify? Thanks for your help! Rick Howieson ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or 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 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------