Jenni, It is not my experiance or expertise on buried vias (as a designer) you should look for, rather the experiance and expertise of your PWB manufacturer. Buried via technology has been around for quite some time and most Board Houses offering this technology are quite comfotable and proficient with it. If you bare board test you should be able to guarantee acceptable yields ( I have my board house do this testing to assure I only buy usable boards). As a designer I always attempt to stay away from this technology as it cost considerably more to fabricate and does not usually seem to "buy" me that much in added real estate. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************