TECHNET Archives

June 2006

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Hfjord <[log in to unmask]>
Date:
Wed, 21 Jun 2006 19:46:23 +0200
Content-Type:
text/plain
Parts/Attachments:
text/plain (69 lines)
I created a rule , that MIL boards (and other components with SnPb, Cu and
Kovar ) that are not to be used within half a year shall be sealed in ESD
plastic bags and filled with DRY nitrogen. Works well, cheap and simple
method.
You need a outdoor space to place the liquid nitrogen tank, they use to be
several meters high and weigh tons. Usually, you rent them from a gas
supplier. Liquid nitrogen is converted to gas nitrogen and fed into the
building via humidity safe stainless tubes. The installation must be done by
professionals!
Ingemar Hernefjord
Ericsson Microwave Systems




----- Original Message -----
From: "Chafin, Ken G." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, June 07, 2006 9:41 PM
Subject: [TN] Low Humidity Storage of PCB's


I have been asked to get a quote on a container/containers in which
PCB's may be stored for up to (10) years with no measurable damage due
to humidity.

A quantity of 1000 PCB's is contemplated. The boards will measure
approx. 8x6x2 inches.

 The storage area will be in a heated/air conditioned building so there
will be no temperature extremes--near office environment.

Have any of you had any experience with this and do you have any
specific recommendations regarding companies that sell appropriate
storage equipment for maintaining low humidity?

We have just begun to discuss this and have thought about using
everything from sealed ESD bags with enclosed desiccant to sophisticated
containers that supply controlled nitrogen.

Anything from knowledge based on personal experience to names of
companies or knowledgeable professionals would be appreciated.

Thanks

---------------------------------------------------
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
-----------------------------------------------------

ATOM RSS1 RSS2