Part 3 - Preparing the phototools

We use laser photoplotters in a temperature and humidity-controlled darkroom to make the films we will use later to image the PCBs. The photoplotter takes the board data and converts it into a pixel image. A laser writes this onto the film. The exposed film is automatically developed and unloaded for the operator. The films are ready now for the PCB fabrication process. http://www.eurocircuits.com/index.php/making-a-pcb-eductional-movies/36-preparing-the-phototools

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