Dennis: Have you considered Asahi as a solder ball source? Asahi Technologies has helped produce over 90 million Lead Free PWB assemblies worldwide and has extensive experience in Lead Free solder processes at Sony, Hitachi, and Thompson. Solutions include easy to use drop-in low working temperature Viromet, and economical SCS7 Lead Free Solder.
SCS7 (SnCuSi) solder has excellent solderability and product reliability compared to SnPb and SnCu based alloys ( mechanical properties, low copper dissolution rate, low drossing rate, low pot corrosion rate) and is very cost competitive. It uses an elevated temp profile similar to 90/10.
Viromet 347 and 349 (SnCuAgIn) solder is a low temperature enhanced SnAgCu solder specially formulated as a drop-in replacement for conventional leaded solder focused on manufacturers of high-end products.
(Available in lead free solder ball, paste, and bar forms)
Please contact me with your specifics.
RH
Robert Hoffman High Reliability Systems LLC Ohio Valley Representative Asahi Technologies email rchoffman323@hotmail.com
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