Steve, The Gore material works well. As we've discussed before, and as I indicated in Marks questions, this is, currently, a highly specialized part of the MLB world. I know you must do what you need and have selected one or more qualified suppliers with many more lurking in the wings. The big caustion, as you already know, is those lurking having transitioned from more common board types to hi-rel types. Gore presents its lamination press cycles to get full "cure." This is a two stage press cycle (A and B( and a critical cool down cycle. The cycles are similar to other "hi-rel" MLB requirements as polyimide and GTEK. The "ordinary" fab folks are very happy with a much simpler cycle going to full pressure and temperature in one big move for about 90 minutes and POP, it's out of there and enjoyed by all commercial folks. As for the thin core/preg stuff, I outlined that in my response to Mark below. No matter, we must continue pushing the envelope in all we do, so why not here. You live the good life Steve, according to: The MoonMan --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------