Maxim makes some silicon serial number chips.  But they aren't "human
readable" - you need to connect a computing/display device to read out the
serial number.

If human readable is what you must have, the only thing I can think of that
will survive all your board treatments is engraving.

Best regards,
Ivan Baggett
Bagotronix Inc.
website:  www.bagotronix.com


----- Original Message -----
From: "Stephen Casey" <[EMAIL PROTECTED]>
To: "Protel forum" <[EMAIL PROTECTED]>
Sent: Thursday, June 05, 2003 8:17 AM
Subject: [PEDA] A little OT - PCB labelling


> Hello all,
>
> What methods of labelling would you recommend for unique identification of
> PCBs. We have been using thermal printed labels for serial numbers etc,
but
> these are destroyed if a board is reworked. The boards have an area for
hand
> writing serial numbers, but this is removed when solvent cleaning!
>
> I need a simple method of labelling individual boards, that'll withstand
> high temperatures and solvents! Any ideas?
>
> Thanks a lot.
>
> Steve.
>
>
>



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