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General guide to solder balls in wave soldering—now you see them, now you don’t

Posted by hglackey on 06 March 2009 at 15:26

There are two types of solder balls generally seen after wave soldering. They can be referred to as consistent/repeating or random balls. Obviously there are lots of theories on how they form and attach/bond to the surface of the solder mask.

Microsections of ball location on a solder mask surface.
Now you seen them, now you don’t. If you have ever tried microsectioning solder balls on a solder mask surface you will know how difficult it is. Losing your balls can be a big problem to some!!!

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