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January 2000

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Subject:
From:
Breton Fleming <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 26 Jan 2000 10:47:40 -0500
Content-Type:
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I am involved in a project with the objective of understanding effects
of PCB surface strain (due to flexure) on component reliability.
Throughout my research, I have encountered studies surrounding global
effects of warpage and flexure on product reliability, but have not
found values indicating maximum stress/strain thresholds for individual
surface mount components.  The advantage of such information would be to
give general ideas about component placement issues on any board, not
just one particular size or geometry.
Any direction as to possible sources of information relating to
individual component stress/strain thresholds (studies, books, articles,
etc.) would be greatly appreciated along with any thoughts or comments.
Any surface mount components are of interest for any one of the
following failure mechanisms:  yield, creep, fatigue.

Thanks in advance for the direction,
Sincerely,

Breton Fleming
Junior Engineer
Newbridge Networks
[log in to unmask]
Phone:(613)599-3600 ext. 1592
Fax: (613)591-1960

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