I have an issue where our production team has ran the wrong reflow profile on a no lead product where Indium NC SMQ-230 no lead paste has been used. You can still see the grains of solder after reflow. What I am look for is if anyone has any recommendations on how to get this no lead solder to reflow again after it has already been through our reflow process. I have already tried running on panel back through the reflow oven and saw very poor results. This was believed to be from the lack of flux. Next I tried a liquid wave flux on the panel and then reflowed. Again poor results were seen. Any ideas of suggestions would be greatly appreciated. Thanks so much!
Make sure that you are running the right leadfree profile. You may want to verify that it is correct with thermocouples. Use Indiums Tacflux023, This should work. As far as cleaning them after this I will have to leave up to you.