I used to see this problem at a former company.  I attriubuted it to 
     an agressive microetch/solderstrip undercutting the mask and allowing 
     a thin piece of soldermask to be removed during the tapetest.  
     
     But since I have not spent years studying soldermask, I can't say for 
     sure..
     
     What type of solder strip do you use??  We used Peroxide Biflouride 
     which probably a bit more aggressive than a standard Nitric.


______________________________ Reply Separator _________________________________
Subject: Solder Mask Peel Off
Author:  [log in to unmask] at corp
Date:    1/3/97 7:29 PM


Friends:
     
  We encounter a problem with solder mask peel off which is near gold
finger, while after gold plated.
  Is there anybody experience to this problem solution ?
Our solder mask in use is "Tamura" & "Taiyo". Gold plating tank is deep 
type.
     
Thanks and Best Regards,
     
Gloria Electronics, Taiwan
R & D Chief
Hawk Chen
     
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