Russ

Sorry to hear you are having trouble. Although you are working with a large
CM it is also probably true that the boards are being assembled off shore,
Asia or Eastern Europe. My experience has been that in these regions,
reliable nitrogen suppliers are almost non existent especially when you get
into the interior. So it is to be expected that a nitrogen process is
unavailable.

Often if a customer insist upon nitrogen, the CM pulls the product back to
North America. Now you not only have the cost of nitrogen, but a much higher
labor cost. The final decision is usually made by management who know little
about quality or reliability, but a great deal about cost. The engineer is
told to suck it up and make it work just like the competition.

Remember the good old days when Bell Labs told Western to just do it and it
happened!

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389


----- Original Message -----
From: "Russ Nowland" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 18, 2006 1:06 PM
Subject: [TN] Nitrogen usage


> Hello Technetter's,
>
> Sometimes in life you find yourself in a pickle and wonder how the heck
> you got there.  It always brings me to that famous quote "It is hard to
> soar with the eagles when you work with a bunch of turkeys".
>
> I have a question:  I am working with and "MAJOR" EMS that does not use
> nitrogen with either Sn/Pb or Pb-free reflow.  In this day and age I have
> never heard of this.  They have it available but will only use it if I
> require it.  At a price, of course. They don't seem to take into account
> it will improve their yields as well.
>
> Is there an IPC, NEMI, or any other standard that requires/recommends N2
> usage for either Sn/Pb or Pb-free reflow process?
>
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