David - AlliedSignal provides Resin Coated Copper with several varying resin thicknesses with the thinnest being 2 mils. Ranges are 2 mils up to 4 mils. It is available on 18 or 12 micron ml or mls copper foil. Kevin R. Thomas MicroVia Materials Product Manager AlliedSignal Laminate Systems 608.791.2288 ---------- >>>From: David Arivett >>>To: [log in to unmask] >>>Subject: FAB:Laser vias >>>Date: Saturday, February 15, 1997 12:54PM >>> >>> >>> >>> >>> An article in the February edition of PCFAB talks about laser drilled >>>micro-vias. It shows a multi-layer stack-up of two cores with pre preg in >>>the center. The outer layers are formed with resin coated foil. My question >>>is: how thick is the resin on the foil? I am sure it must be at least 2 >>>mils >>>in order to have enough resin to encapsulate the inner layer circuitry. >>>What >>>is the maximum it might be? >>> >>>David Arivett >>>Cuplex Inc. >>> >>>*************************************************************************** >>>* TechNet mail list is provided as a service by IPC using SmartList v3.05 * >>>*************************************************************************** >>>* To subscribe/unsubscribe send a message <to: [log in to unmask]> * >>>* with <subject: subscribe/unsubscribe> and no text in the body. * >>>*************************************************************************** >>>* If you are having a problem with the IPC TechNet forum please contact * >>>* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * >>>*************************************************************************** >>> >>> *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************