A recent article in Data Week looked at the differences between vapor phase soldering (VPS) versus convection soldering for lead-free.
A recent lead-free trial comparing VPS with convection for a client showed an increased number of lifting defects with VPS. If one only looked at the total PPM levels one may say that VPS was the reason, but the defects were all on one component size (0402) - hence the need for good documentation during new-product-introduction design reviews.
One lead-free process defect which has been apparent with a number of lead-free trials on 0201 chip resistors/capacitors and small chip-scale packages is not seen with VPS.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.