Wes, I haven't had problems with thin boards; badly designed thin boards maybe. I am running a PWB of .012 thickness now, COB one side BGA the other. I have recent memories of .035 parts. Usually the BGA fan out pushes the layer count up where .062 is the prevalent thickness. Brad --------------------------------------------------------------------------------- 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 the following message: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------