I would suggest the Hysol 50-000 series Cat-L-inks, two part heat curable 
epoxies for screen printing (although we also stamp and hand letter).  Suggest 
the 45 or 77 catalysts.  For surface pre-treatment we allow light abrading but 
usually just an acetone or IPA cleaning is sufficient (just prior to ink 
application, then dry then apply ink).
______________________________ Reply Separator _________________________________
Subject: ASSY : Marking On Nickel/Gold
Author:  [log in to unmask] at esdigate
Date:    5/10/96 4:19 AM


Item Subject: cc:Mail Text
I need to implement ink marking on nickel and gold surfaces for IC 
components. Can anyone advise me on,
     
a.  Type of ink (for pad-mark)
b.  Surface pre-treatment process
     
that would ensure that the ink would meet the MIL-std mark permanancy test 
requirements ? Appreciate your expert advise !
     
Thanks
     
Jeff-MH Tan
Snr Process Engineer
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