In a previous life (previous employer) we used labels with barcodes on
them. Worked well, other than the odd one where the print was damaged
or torn. If memory serves, Decca labels, but there are equivalent
labels from Brady, Monarch, and Zebra - likely others.
Boards weren't coated, and we had no issues with them coming off during
processing, or on field returns.
regards,
Graham Collins
Process Engineer,
Northrop Grumman Canada Corporation
Halifax
(902) 873-2000 ext 6215
>>> [log in to unmask] 05/09/03 10:30AM >>>
Another solution could be using Brady labels. Those
labels
withstand temperature and after CC they stay on boards really well. We
use
Brady printers for serial numbers and other uses but not for
bar-coding
yet. It is in our plan. Is anybody out there using bar-code labels
that
might want to share their experiences?
Regards,
Ramon
> -----Original Message-----
> From: Zweigart, Siegmund [mailto:[log in to unmask]]
> Sent: Friday, May 09, 2003 6:59 AM
> To: [log in to unmask]
> Subject: [TN] laser marking systems
>
>
> Hello all
>
> For a new customer we are looking into laser marking systems.
> It should be able to mark bar code and 2D data matrix codes in the
solder
> mask.
> We had some discussions with customer and some potential suppliers.
> Some questions came up:
> - What is better: Nd-YAG or CO2 laser (in the Nd-YAG process
the
> solder mask is removed down to the bare copper, with CO2 only
the
> color is changed).
> - Do you have any experience with readability of the barcode
after
> the
> product was exposed to Air / humidity / soldering processes?
>
>
> All input welcome
>
> Siggi
>
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