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March 2012

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Subject:
From:
"David D. Hillman" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Wed, 7 Mar 2012 09:15:48 -0600
Content-Type:
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Hi Scott - If I was a betting man, my guess is that Steve "poured" some 
solderballs on the assembly and took a picture of a "perfect" defect. 
That's a whole bunch easier than trying to place it (at least with my eyes 
too).

Dave



"Post, Scott E" <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
03/07/2012 07:55 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
"Post, Scott E" <[log in to unmask]>


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Subject
Re: [TN] Need image of solder ball shorting a device






If Steve placed that solder ball then he's definitely got better eyesight 
and dexterity than me.

Scott Post
P.O.U. 0000-001E-0CTC
2151 E. Lincoln Road
Kokomo, Indiana    46904-9005
765-451-2983 (Phone)
765-451-0287 (FAX)


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Tuesday, March 06, 2012 3:10 PM
To: [log in to unmask]
Subject: Re: [TN] Need image of solder ball shorting a device

Nice job, Steve!

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, March 06, 2012 1:37 PM
To: [log in to unmask]
Subject: Re: [TN] Need image of solder ball shorting a device

Hi Scott,

Albeit staged, how would this one work for you?

http://stevezeva.homestead.com/SolderBall.JPG

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Post, Scott E
Sent: Tuesday, March 06, 2012 10:31 AM
To: [log in to unmask]
Subject: [TN] Need image of solder ball shorting a device

I'm putting together some internal training materials on ANOVA, 
regression,
and DOE and I'm making up an example scenario along with some fake data 
for
the students to work through.  Can someone send me a picture of a small
solder ball (maybe a mid-chip solder ball from a resistor) that got loose
and lodged between a pair of QFP/SOIC/BGA leads causing a short?  I have
plenty of pictures of mid-chip solder balls from back when we were using
rectangular paste apertures, but I don't have a picture of one getting 
loose
causing a short.

Thanks,

Scott Post
P.O.U. 0000-001E-0CTC
2151 E. Lincoln Road
Kokomo, Indiana    46904-9005
765-451-2983 (Phone)
765-451-0287 (FAX)

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