I have used the CircuitWorks conductive ink pen before.  I did manage to fix a
crack in a trace on a membrane keyboard one.  In general the stuff didn't work
very good at all.  I have heard that the conductive epoxies work good though.

Bala Chandar wrote:

> I would like to know the experience of anyone who has used conductive silver
> ink for repairing tracks on a PCB.
>
> I have a handy Casio solar calculator. It is quite thin and has a nice big
> display. Once it got wet in the rain and after that certain segments are
> missing in the digits. An examination of the PCB reveals that the board is a
> thin mylar sheet and all the tracks are made of conductive polymer. Some
> tracks need to be repaired. I am wondering whether to buy the silver ink
> from the market. The 10ml pack costs roughly twice as much as the calculator
> itself!
>
> Are there less costly alternatives available for repairing polymer tracks on
> a PCB?
> Any suggestions please?
>
> Thanks & Regards,
> Bala
>
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