Oops! Found another design error? Sometimes designers who fail to validate the schematic, layout and board risk wasting time on rework and wire tacking. And, sometimes wire tacking seems to be a necessary evil in an ever-changing design environment.
Jumper wires, also called wire tacks and patch wires, are discrete electrical connections that are part of the original design. The purpose of these additional wires is to bridge portions of the conductor pattern formed on a printed board. Haywires, on the other hand, are discrete electrical connections that are added to the board in order to modify the basic conductor pattern.
When do you need to add them? Well, you might need additional wires if a design flaw appears in production and test. Also, you might need additional wires if an upgrade or modification is needed, and it’s not possible to scrap the boards. Sometimes a damaged board requires a repair involving additional wires.
However, not all rework options require jumper wires or haywires. Take a look at this rework option case study from CircuitMedic. Here, circuit patterns were corrected using flat ribbon conductors.
Whichever option you choose, experts advise careful consideration of all proposed rework methods based on your unique situation—before your board goes completely haywire.