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April 2013

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Subject:
From:
Reuven Rokah <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Reuven Rokah <[log in to unmask]>
Date:
Tue, 30 Apr 2013 16:56:59 +0300
Content-Type:
text/plain
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text/plain (69 lines)
Hi Leland,

You will need a PCB that warp during reflow or use oxide balls of BGA
components or very low active flux.
After the cooling, the warped PCB will come bake to planar state and the is
no longer active so the head on pillow may created.

Reuven

On Tue, Apr 30, 2013 at 4:44 PM, Leland Woodall <[log in to unmask]>wrote:

> Folks,
>
> Can anyone out there tell me how I can intentionally create a head in
> pillow defect?  I want to see if our X-ray machines are capable of
> detecting this condition, and if so, how repeatable they are.
>
> I'm sure there are several ways to do this, but I'm looking for the most
> simple.
>
> Thanks for your help!
>
> Leland
>
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Best Regards,

*Reuven Rokah*

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