Part 3 - Preparing the phototools
Channel: Eurocircuits
Date: 08/05/2014

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