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June 2003

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Subject:
From:
Werner Engelmaier <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 12 Jun 2003 07:50:08 EDT
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In a message dated 06/11/2003 16:28:12, [log in to unmask] writes:
>Werner,
>Then I'll bet you have a fully controlled, well written, approved "bang-em
>'gainst the wall" procedure...hmmm

Hi 'fasbell,'
Yes, but you have to have a 'calibrated' wall, I previously wrote:
Hi Ofer,
'Tis a pity you do not have a lab; however...., I take it you have a desk and
a screwdriver [not too large] and..... I take it you can sacrifice every so
often one of the components so cheaply acquired by your purchasing department
[who runs your company anyway?] together with one of your, I am sure also
cheaply procured, circuit boards, run an assembly test, and pry off [use your
'calibrated' hands with the not-too-large 'calibrated' screwdriver]. The
force this
takes is immaterial, what is important is the resulting failure mode(s). If
the separation is interfacial cleanly between the soldering pads and the
solder
balls =>REJECT, if the soldering pads a ripped of the PCB [or the compentent]
=>ACCEPT.

Werner

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