Kirk VanDreel
06/25/97 11:12 AM
What are the MIL-STDs or other specs for this packaging?





TechNet @ ipc.org on 06/25/97 12:12:43 PM

To:   Kirk VanDreel
cc:
Subject:  N2-bags


Received: from htch.com by nsmtp.htch.com (Lotus SMTP MTA v1.06 (346.8
3-18-1997)) with SMTP id 862564C1.0054EF1E; Wed, 25 Jun 1997 10:27:42 -0500
Received: from simon.ipc.org ([209.42.29.3]) by gateway.htch.com with SMTP
id <18437-1>; Wed, 25 Jun 1997 10:18:16 -0500
Received: from ipc.org by simon.ipc.org via SMTP (940816.
SGI.8.6.9/940406.SGI)
  id KAA06230; Wed, 25 Jun 1997 10:12:43 -0700
Resent-Date:Wed, 25 Jun 1997 12:12:43 -0500
Received: by ipc.org (Smail3.1.28.1 #2)
 id m0wgtDL-000BkrC; Wed, 25 Jun 97 09:38 CDT
Resent-Sender: [log in to unmask]
Old-Return-Path: <[log in to unmask]>
From: [log in to unmask]
X-Openmail-Hops: 1
Date:Wed, 25 Jun 1997 09:39:04 -0500
Message-Id: <H000022200dec62d@MHS>
Resent-To: <[log in to unmask]>
Subject: N2-bags
Mime-Version: 1.0
Sender: [log in to unmask]
To: [log in to unmask]
Content-Type: text/plain; charset=US-ASCII; name="N2-bags"
Content-Disposition: inline; filename="N2-bags"
Content-Transfer-Encoding: 7bit
Resent-Message-ID: <"n37qE1.0.ggP.HrIip"@ipc>
Resent-From: [log in to unmask]
X-Mailing-List: <[log in to unmask]> archive/latest/13635
X-Loop: [log in to unmask]
Precedence: list
Resent-Sender: [log in to unmask]



UGH, again.!
    I have a question about putting components in Nitrogene-filled
plastic bags for getting better long term solderability of legs. Of
course, this operation will exclude reactive Oxygene and Water vapour,
but how effective is this in reality? Plastic is plastic and has
considerably bigger molecules than has water and air. Sooner or later
the pressure diff. ought to be eliminated by Mother Nature. The question
is  WHEN . I know NASA, ESA and others in the "high-tech"  branch use
this method for longtime backup storage, and we have to do the same in
some product areas, maybe. There are MIL-STDs and a lot of specs, but
what normal person can stand all this reading! I'm a man of practise and
I hope somebody can tell: the protection works for xx years, not more.
The  very question now is: installing or not installing the equipment.
/Best  regards / Ingemar

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************





***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************