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July 2006

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Subject:
From:
Jeffrey Bush <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jeffrey Bush <[log in to unmask]>
Date:
Tue, 18 Jul 2006 12:30:10 -0400
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Generally we see the request from folks who have had issues with
shelf-life of silver/tin.  

Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED 
           76 Technology Drive - POB 1890 
              Brattleboro, Vermont 05302
                Voice - 802.257.4571 ext 21
                    Fax - 802.257.0011
                       <http://www.vtcircuits.com/> 
                           

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Eddie Rocha
Sent: Tuesday, July 18, 2006 11:28 AM
To: [log in to unmask]
Subject: Re: [TN] silver anti-tarnish

Thanks Rudy and Lee. One of the other questions I had was
if this is a typical expectation or an unusual request, to
coat the silver with the OSP? Anybody out there requiring
this of their fab supplier?

Eddie Rocha



Actually, most immersion Silver plating systems have an
anti-tarnish as part of the plating bath, which co-deposits
with the Silver...

  And if you want to add a serious antitarnish on top of
that, you can, as Lee Parker suggests, put an imidazole on
top, which is also known as an OSP... the Enthone Entek is
an imidazole...

  Rudy Sedlak
  RD Chemical Company



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