Thanks for the advice. I'm not even an ee, I'm a chemist. Then again, our boards are mostly designed to evaluate our soldering products and have little electrical functionality. Our QFN's are dummies, and they are problematic as always. Practical's drawings are not always accurate and they don't always provide board design guidance. Fun-Fun Karen Tellefsen - Electrical Testing [log in to unmask] 908-791-3069 ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------