TECHNET Archives

May 2014

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:
Graham Collins <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Graham Collins <[log in to unmask]>
Date:
Fri, 2 May 2014 15:17:35 -0300
Content-Type:
text/plain
Parts/Attachments:
text/plain (45 lines)
Hi Jim
We are running two reflow ovens, no nitrogen and no problems (lead and
lead free).   We only run nitrogen in our selective solder machine.

At a previous employer we ran nitrogen, it helped with the process (RMA
flux, and some times the parts were pretty old so any help to
solderability was good).  We did typically run air at that facility
though and only ran nitrogen on boards with BGAs and where we knew
things were difficult.  The one funny product we had was a board where
the pads for the caps were oversize, when we ran it with nitrogen we had
a tombstone fest - a graveyard of tombstones.  Run it with air and the
tombstones went away.

regards,

Graham Collins
Senior Process Engineer
Sunsel Systems
(902) 444-7867 ext 211

On 5/2/2014 2:50 PM, Jim West wrote:
> Good Friday all,
>
> Wondering how many out there, using both lead and lead-free solder, are using nitrogen with your reflow process?  At a previous factory, we did not use nitrogen as part of our reflow process and where I'm working today, we use Nitrogen on all our lines.  I had success without nitrogen and we are having success with nitrogen.  At the APEX show, I spoke with at least one reflow oven manufacture about their oven and what they feel about the use of nitrogen and they pretty much said they are selling less ovens with nitrogen.  To the point of 90%+ of their ovens are sold without the nitrogen option.  As most know, nitrogen is very expensive and I would like to justify not using nitrogen in the future, but I have an uphill climb due to my parent company suggesting we use nitrogen based on a policy created over 7 years ago.  Based on our product mix, I'm of the opinion we don't need nitrogen.
>
> What are your thoughts on using nitrogen with the reflow process?
>
> Has anyone gone through the process of eliminating the use of nitrogen and had success afterwards?
>
> Thanks,
> Jim
>
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________

ATOM RSS1 RSS2