Separate topic, how was the IPC 7711/7721 training class? Worthwhile?
We have been considering it....
Karen H.A. Capps
HR Manager (acting)
(850) 539-2500 x257
(850) 539-2509 Fax#
www.teligentems.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Monday, July 21, 2008 1:54 PM
To: [log in to unmask]
Subject: Re: [TN] Solder balls
Hi Genny!
Sorry it's taken me a bit to get your picture posted, but I just got
back from 2-weeks vacation and a week in Colorado going to a
IPC-771/7721 instructor certification class, so I've been catching up on
things this morning. But here is your picture:
http://stevezeva.homestead.com/files/solderballs-QFN.jpg
Myself, I wouldn't worry about them tiny solderballs. They probably
aren't going anywhere, and besides if they did, they're so small what
problem could it cause?
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Monday, July 21, 2008 10:52 AM
To: [log in to unmask]
Subject: [TN] Solder balls
Have you ever gotten a much better analytical tool available to you, and
have it cause major panic due to what you can see now that you never saw
before?
We got a major fancy dancy brand new X-Ray.
Now we see things like the attached picture. Steve, could I trouble you
to post it for me?
<<solderballs-QFN.jpg>>
Our old X-Ray would have never seen this.
Would you fail these solder balls?
It is a QFN, 0.5mm pitch, 0.3mm pad width with a heat slug.
I think trying to replace this device by hand would cause more trouble
than we see right now.
Genny
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