Electric circuit for electronic machines, printed by means of a silk-screen process onto a polyester film with a multi-layered structure.

摘要

A circuit board of which the main wires (2), which are conventionally printed, by silk screening on one side of a polyester film (1), are covered and protected by a second film of polyester (5) which also covers the holes (1a) made in the film (1) at the various intersection points at which the electric contact is made between the main and secondary wires (4), which are subsequently silk-printed on the other side of the film (1) and if necessary covered by a layer of protecting varnish (6).