Try either an epoxy like Haven or an acrylate like Taiyo.  Epoxy systems
seem to have a less occurrence of this issue.   

Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED 
           76 Technology Drive - POB 1890 
              Brattleboro, Vermont 05302
                Voice - 802.257.4571 ext 37 
                    Fax - 802.257.0011
                       <http://www.vtcircuits.com/> 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ralph Richart
Sent: Monday, March 26, 2007 9:27 PM
To: [log in to unmask]
Subject: [TN] Legend Ink and ENIG

Fab Question: 

Does anyone know of a legend ink that will not turn color (pink or
purple) during the assembly process when applied prior to ENIG?  We used
to have one that we could apply prior to doing the ENIG process, but it
was dicontinued.  Everything we have tried since then needs to be
applied after ENIG or it will change color down the road in assembly. 

Thanks for the help.

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