hi,

just a word of caution about grit blasting the pwb with alumina.  if there is any tin-lead plating (or equivalent) present, there is a strong chance that the grit will become embedded in it.  it has been my experience that the grit will be very, very difficult to remove.

phil

-----Original Message-----
From: Mark Mazzoli [mailto:[log in to unmask]]
Sent: Friday, April 14, 2000 3:36 PM
To: [log in to unmask]
Subject: Re: [TN] Roughing up a board


Hi Jason,

You might try having them processed through an aluminum oxide blaster.  I
don't know about the documentation part of your question but I think you'll
find that a high-pressure media sprayer, like aluminum oxide or whatever,
will "matte" the surface without removing copper or damaging any feature.

Mark Mazzoli

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