Graham,
Please let me know as well if you can......
Regards,
Amol
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Thursday, June 25, 2009 9:55 AM
To: [log in to unmask]
Subject: Re: [TN] Solder paste validation at point of use
Graham,
That is exactly what I am looking for. Where can I get a copy of the
draft/standard?
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Naisbitt
Sent: Thursday, June 25, 2009 8:11 AM
To: [log in to unmask]
Subject: Re: [TN] Solder paste validation at point of use
Hi Techies
As a follow-up to Richard's question, you might note that I have
presented a "Solder Paste Process Test" that is a modified version of
the 5 IPC-TM-650 methods examining: Slump, Solder Balling, Spreading,
Tack and Wetting plus a new "Open Time" method. These can all be run
within an hour to verify the paste is fit for use.
The original document is a SMART Standard that is now in with IPC
Committee for consideration.
If anyone wants some more information, let me know directly.
Regards
Graham Naisbitt
Email: [log in to unmask]
Phone: +44 (0)12 5252 1500
Web: www.gen3systems.com
On 24 Jun 2009, at 15:22, Stadem, Richard D. wrote:
> I would like to know what others do to ensure that the solder paste is
> good at the point of use.
>
> I am NOT looking for a solder paste handling procedure, what I am
> looking for is what type of test can be performed that is quick, easy,
> and does not hold up production. We do paste viscosity testing on each
> lot that we receive, and we also strictly monitor our paste printing
> process with the post-print inspection machine. We have validated our
> entire solder paste handling system to ensure that the paste is
> handled,
> labeled, and properly rotated.
>
> We have had no issues with the solder paste that we use.
>
> Our customer thinks we should test each lot of paste when it is
> removed
> from refrigeration prior to use on production hardware. I am not
> really
> sure what a second viscosity check would do for us, but I am open to
> some other testing method that does not consume a lot of paste and
> would
> provide data we can use.
>
> Any suggestions?
>
>
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