Hi Siggi
You have to choose carefully the barcode location, in order not to change
the cross section of controlled impedance conductors, after the laser
operation.

Best  Regards

ROKAH Reuven

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                      "Zweigart,
                      Siegmund"                  To:      [log in to unmask]
                      <SiegmundZweigart@         cc:
                      HG.SLR.COM>                Subject: [TN] laser marking systems
                      Sent by: TechNet
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                      09/05/03 01:59 PM
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                      "Zweigart,
                      Siegmund"





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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