The most method of ball formation is screen printing of paste and reflow that is how I make the SMART Group dummy packages used on our surface mount workshops and demonstrations lines. It is easy cheap and works very well it does not give the same ball volume. One German company uses the technique for making their own packages used in products like professional telecommunications. A alternative method would be liquid paste dispensing or liquid solder jetting. Bob Willis Electronic Presentation Services 2 Fourth Avenue, Chelmsford, Essex CM1 4HA. England. Tel: (44) 01245 351502 Fax: (44) 01245 496123 Home Page: http://ourworld.compuserve.com/homepages/bwillis Email: [log in to unmask] *************************************************************************** * 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. * ***************************************************************************