Attached pictures are a lifted power pad+trace of a 1000W PSU of a commercial subwoofer. Caliper showed 0.42mm thick, which if correct gives about 12oz copper trace!

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In this particular pad was the source of a mosfet after rectifier bridge, transformer and capacitors bank.

Pad+trace are intact, I just need to reliably fix them back to place.

What are the best options? Epoxy? Maybe araldite? I am not sure if it will ever corrode copper or sensitive electronics.


Epoxy should be a great choice. I would tape the back of the circuit board so that the epoxy can go in the hole and self-level, put the epoxy in, and then use tape to hold the trace down.

After that, you'll need to re-drill the hole for the replacement component. The existing hole was probably plated through; if it was, you will need to solder the component onto both the top and bottom traces.

  • \$\begingroup\$ Mechanically I also think one can't go better. Now, are you sure that epoxy won't corrode anything? \$\endgroup\$ – tfm Jan 2 '15 at 5:06
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    \$\begingroup\$ @tfm it looks like the vias have separated also. you may need to feed a wire through and solder it on both sides after you're done. \$\endgroup\$ – kolosy Jan 2 '15 at 5:24
  • \$\begingroup\$ Folks, anybody else? Epoxy corroding copper or electronics? \$\endgroup\$ – tfm Jan 3 '15 at 0:18

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