Good Morning!
Does any of you get a copy of following paper in hand?  would you kindly fax
me a copy?  Many thanks.
Best regards,
                                                       Joyce Koo
                                                       EXFO Photonic
Solutions
                                                       FAX 905-821-2055



Presented at IPC Printed Circuits Expo 2002, Long Beach Convention Center,
Long Beach, CA, March 24-28, 2002

Defining Accelerated Test Requirements for PWBs: A Physics-Based Approach
Kevin D. Cluff
Honeywell Air Transport

Michael Osterman
CALCE EPSC
University of Maryland
College Park, MD 20742

Abstract:

Typically thermal cycle test requirements for printed wiring boards (PWBs)
are somewhat arbitrarily established for a particular product. Many programs
simply default to a standard test without much quantitative analysis. With
product reliability and cost management pressures, developing realistic
accelerated test criteria is vital. The procedure described in this paper is
based on substantial measured field environment data, a validated
acceleration model with a generalized product definition, and
statistically-based test requirements. While the particular example is for
commercial air transport avionics, the proposed procedure is easily
extensible to other high reliability applications.

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