On Sat, 13 Jan 2001 22:12:05 -0500, you wrote:

>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.
The circuit Works pens tend to gum up long before they run out.
Conductive epoxy is great stuff, and lasts much longer in the tube
than solvent-based paints. Very expensive, but probably cheaper in the
long term as it doesn't dry out.
>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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