Printed circuit board milling
Printed circuit board milling ( also: isolation milling ) is the process of removing areas of copper from a sheet of printed circuit board material to recreate the pads , signal traces and structures according to patterns from a digital circuit board plan known as a "layout file" . 
<triplet> Printed circuit board milling <subj> printed circuit board <obj> product or material produced <triplet> signal trace <subj> printed circuit board <obj> part of