Dazor?


______________________________ Reply Separator _________________________________
Subject: Re: FAB and ASSY: Spec for Electroless Ni and Immersion Au
Author:  [log in to unmask] at corp
Date:    6/4/97 7:38 AM


Randy:

I haven't found any.  Even our customer's who request Ni/Au finishes don't have
criteria.  I'd be happy to work with you on it.  Common sense says that
functionally, what is needed is:

 -  Good solderability
 -  Flat smooth surface

I go with a Dazor inspection, allowing no exposed Ni visible under the dazor.
Pass the ANSI J-STD-003 solderability test, and follow normal inspection
procedures for coating on tabs, tab voids, etc that would apply to Cu or HASL
pads.

Shading of ring lights I encourage, to  help referee  on visible scratches, etc.

Hope this helps.  I plan on working with the alternative finishes task group to
encourage this type of simplistic, functional specification.

Jim Herard
IBM Microelectronics
Quality Engineering
[log in to unmask]

        randyre @ fgspo01.merix.com
        06-03-97 07:10 PM
Please respond to [log in to unmask] @ internet


To: Technet @ ipc.org @ internet
cc: johnd @ fgmpo01.merix.com @ internet, stevesp @ fgspo01.merix.com @ internet

Subject: FAB and ASSY: Spec for Electroless Ni and Immersion Au

What industry standards are available that provide inspection criteria
for immersion gold and electroless nickel finishes?

If no specification is available, what are OEMs using as inspection
criteria for this finish?

Randy Reed
Merix Corporation
[log in to unmask]
503.359.9300  x5-4421

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