By Bob Willis
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Solder paste quality and performance is significantly important and considerable engineering goes into its production. Selecting the best materials for your product and assembly process is key to high yield and your customers’ satisfaction. Solder paste must be compatible with your equipment and other processes you use like cleaning, coating and electrical test. Working with suppliers to achieve the best performance is vital but so is periodic review of materials used.
There are always improvements being made to printing and jetting technology and it is important that engineers consider whether there are technical or commercial reasons to change. We look at common testing methods and some of the simple shop floor techniques used over the years to understand the different types of process failures.