No,
That would make you a 'Curious George'!
Figured I would toss that in before Dewey got up this morning.
Steve C
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Wenger, George M.
[Contractor]
Sent: Tuesday, April 30, 2013 9:17 PM
To: [log in to unmask]
Subject: Re: [TN] Pic of head-in-pillow for the site
Hi Dave,
I'm really not a Doubting Thomas and I do believe you (because I know you)
that the x-ray is of a HOP defect but I think it would be helpful to say how
you know for sure that the x-ray shows a HOP defect. I assume you know it
is a HOP defect because you looked at it optically (i.e., with a mirror or
fiber scope) and saw it was a HOP defect or you cross sectioned it an
confirmed it was a HOP defect. Do you have an optical image or
photomicrograph of a cross section of the defect shown in the x-ray image?
The problem we've had with x-raying large high I/O count BGAs is that time
consuming to scan all of the balls at a high enough magnification to find
the balls that appear different from normal solder joints and once we
identify the non-normal looking balls we not sure if the defect is a HOP or
a non-soldered interconnection due to a solder paste stencil misprint or
insufficient print. When the defects are on outer rows we can usually tell
by optical inspection what kind of defect it is.
Regards,
George
George M. Wenger
Failure Signature & Characterization Lab LLC
609 Cokesbury Road, High Bridge, NJ 08829
(908) 638-8771 Home (732) 309-8964 Mobile
E-mail: [log in to unmask]
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: Tuesday, April 30, 2013 5:10 PM
To: [log in to unmask]
Subject: Re: [TN] Pic of head-in-pillow for the site
Yes, the corner ball has the HOP.
Dave
From: "Steve Gregory" <[log in to unmask]>
To: <[log in to unmask]>
Cc: <[log in to unmask]>
Date: 04/30/2013 04:08 PM
Subject: RE: [TN] Pic of head-in-pillow for the site
Hi Dave!
Have your picture posted, it?s here:
http://stevezeva.homestead.com/HOP_iso1.jpg
It?s the corner ball, right?
Steve Gregory
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Tuesday, April 30, 2013 12:43 PM
To: Steve Gregory
Subject: Re: [TN] Pic of head-in-pillow for the site
Steve - please post this HOP too - same type of thing as Ed's but another
example for everyone benefit:
Dave
From: Steve Gregory <[log in to unmask]>
To: <[log in to unmask]>
Date: 04/30/2013 10:56 AM
Subject: Re: [TN] Pic of head-in-pillow for the site
Sent by: TechNet <[log in to unmask]>
Hi Ed!
Nice image! Got it posted, it's here:
http://stevezeva.homestead.com/Head-in-pillow_X-Ray.JPG
What about the void off to the right? Is there any concern about that?
Steve Gregory
Process Engineer
Kimco Design and Manufacturing
652 N. Five Mile Road
Boise, ID 83713
(208) 322-0500 Ext. 3133
From: Ed Popielarski [mailto:[log in to unmask]]
Sent: Tuesday, April 30, 2013 8:58 AM
To: Steve Gregory
Subject: Pic of head-in-pillow for the site
Hi Steve,
I have a good X-Ray picture of a head-in-pillow that Leland would find
helpful. If you don't mind posting it for him?
Ed Popielarski
Engineering Manager
970 NE 21st Ct.
Oak Harbor, Wa. 98277
Ph: 360-675-1322
Fx: 206-624-0965
Cl: 949-581-6601
https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn
=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
<https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&sp
n=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A>
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