They have been used to route out copper from plated PCBs, cut out the part that etchant would normally remove.
They have been used to route out copper from plated PCBs, cut out the part that etchant would normally remove.I have not seen that appleied conductive material to bare material (such as fiberglass sheet) to make a PCB.Before PCBs, we used to have PWBs - where actual wire was put down for the traces. Like in the 80's.Glueing double sided boards together with B-stage material in between has been the norm for quite a while.
The PWB process allowed the wires to be stacked up, crossed over, etc. Didn't have layers of cards.As I said tho, its been surpassed by gluing multilayer cards together.
loved the old "cordwood" PCB fab method shown on that wikipedia page...
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