What is a good solder paste to use?
A. Whatever works for your product. In our view, there is no such as a “good” material or a “bad” material. You just have to find materials that have the right blend of properties for your hardware and your process. We have seen very good results from: Alpha Metals UP-78, Kester 245, Indium SMQ-92J, Multicore X33, although each paste manufacturer has some excellent offerings. It depends on what you are looking for.
