What is Selective Soldering

- Jun 12, 2018 -

Selective soldering is one of the processes used in the construction of various electronic assemblies, usually circuit boards. Typically, the process involves the soldering of specific electronic components onto a printed circuit board while leaving other areas of the board unaffected. This is in contrast to various reflow-soldering processes that expose the entire board to molten solder. In practice, selective soldering can refer to any soldering method, from hand soldering to specialized soldering equipment, so long as the method is sufficiently precise to apply the solder only on the desired areas

It is common for a circuit board to undergo several different soldering processes during its construction. As an example, a circuit board may have all of its less sensitive components, such as resistors, installed and then soldered using an oven-reflow process. The board would then undergo a selective soldering process to install its more sensitive components under different or more controlled conditions, such as within a very specific temperature range

Several different technologies exist to perform the task of selective soldering. These can solder the desired connections either all at once or one at a time. Typically, all-at-once technologies require specialized tooling for every different set of tasks they must perform. While such tooling is usually not needed for one-at-a-time technologies, they do tend to take much longer to accomplish a given task

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