When removed from the etching solution, the PCB is washed and a PCB eraser is used to remove any film from the tracks. This must be done carefully because the film will prevent good soldering of the components to the PCB. The tracks can be checked using a magnifying glass. If there are gaps in the tracks, sometimes they can be repaired using wire but usually a new PCB has to be etched.

The last stage is drilling the holes for the components. A small PCB drill is used for this purpose.

Again care is needed as a good PCB can be ruined by careless drilling.

This is a completed Printed Circuit Board (PCB) and all its components are soldered in position. It has been manufactured through the processes described in the information sheets.
PCBs manufactured in industry are designed on a computer and then manufactured on an production line controlled by computers. Usually there is very little human contact.

2. What safety precautions should you take when using ‘developer’ and the ‘etching solution’ ?

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