We use for delivery and storage.  With Silver they keep the finish from
yellowing and with Tin the oxidation if reduced.  We use Daubert VCI
www.daubertvci.com


Jeffrey Bush
Director, Quality Assurance and Technical Support

VERMONT CIRCUITS INCORPORATED
  76 Technology Drive - POB 1890
    Brattleboro, Vermont 05302
      Voice: 802.257.4571.21 Fax: 802.257.0011
           http://www.vtcircuits.com
 

-----Original Message-----
From: Kaye Clayo [mailto:[log in to unmask]] 
Sent: Thursday, January 27, 2005 1:28 PM
To: [log in to unmask]
Subject: [TN] Corrosion Inhibitors - VCI's on IAg finished boards

Hi Technet,

Does anyone have any experience using vapor corrosion inhibitors
(VCI's),
and if so, would this be suitable (or even necessary) to use to store
raw immersion silver finished printed circuit boards or
partially assembled IAg boards to extend the shelf life of the finish?

It is my understanding that VCI's "work" by seeding the air surrounding
the
metal object and depositing (electrons?) on the surface which protects
the
finish from corroding (tarnishing), and that they can have a variety of
proprietary chemical compounds to do this.

I am concerned whether or not the VCI's can affect the solderability of
the IAg
surface finish, and also the personal health risks involved (if any).
There is a paper called silver saver paper that has the VCI chemical
sprayed onto it.
I am questioning if this is OK to use to slip sheet IAg boards.  There
are also VCI plastic bags.

I guess my ultimate question would be how to store the IAg boards after
the package is opened
and before final assembly (what kind of bags or boxes or such and
whether they should be vacuum packed).

Thank you in advance for your thoughts.

Kaye Clayo

CONFIDENTIALITY NOTE: This message is intended only for the use of the
individual or entity to which it is addressed and may contain
information that is privileged, confidential, and exempt from disclosure
under applicable law. If the reader of this notice is not the intended
recipient, you are hereby notified that any dissemination, distribution
or copying of this communication is strictly prohibited. If you have
received this communication in error, please notify the sender
immediately.



________________________________________________________________________
_____
Scanned by IBM Email Security Management Services powered by
MessageLabs. For more information please visit http://www.ers.ibm.com
________________________________________________________________________
_____

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------