As we all know there are problems with solder balling on solder resist during wave soldering in both air and nitrogen. Today many suppliers of masks state that they will be solder ball FREE resists !!!!!! Well its time to do the first real production trial via Technet and SMART E LINK. SMART is Europe's Largest Electronics Trade Association. Like other trials conducted by the SMART Group the information will be freely available to any engineers for future reference and should be of particular interest to printed board fabricators. I have a solder balling test pattern for any solder mask suppliers who would like to have a Free evaluation of there mask under standard wave soldering conditions. Well its over to the solder mask suppliers lets see what is the best solder resist on the market and are ball FREE resist available. All the test results of this trial will be provided on Technet for other engineers to consider. The IPC criteria will be used as a reference for acceptability and be assessed by members of the SMART Group. Bob Willis Honorary Vice President SMART Group Process Engineering Consultant 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. * *************************************************************************** * 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] * ***************************************************************************