In a message dated 6/28/2001 3:20:58 PM Central Daylight Time, [log in to unmask] writes: > In addition, we all know that HASL is a nasty, dirty, filthy, rotton (fill > in the descriptor of your choice) process and often leaves nasty, dirty > filthy rotton residues behind. It does nasty things to insulation > resistance. If you are going the no-clean route, HASL residues can kill > your product and sometimes, users of your product. By comparison, OSP is a > much cleaner process and does not impact insulation resistance. > Amazing that any planes are still flying or equipment is still functioning after all these years of that "nasty" process that has provided adequate product. Susan Mansilla