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Voids, breaks or gaps in printed circuit lines are often repaired by attaching a small wire across the gap in the line. On very small lines, bare gold wire can be used effectively.
English (United States)
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Protecting Repair Wires on Printed Circuit Boards
Voids, breaks or gaps in printed circuit lines are often repaired by attaching a
small wire across the gap in the line. On very small lines, bare gold wire can be
Unfortunately, such repairs tend to be fragile. It has been found that gold
repair wires can be effectively protected by covering them with a thin coating of
polyimide. This is particularly useful where there is a layer of polyimide under the
The polyimide coating can be effectively applied by a small fork-like needle
which is dipped into the polyimide and pulled through a metering hole to wipe off
any excess polyimide. The only polyimide on the needle is then the polyimide
between the forks of the needle.
The needle is moved along the repair wire, coating the wire with the