CARBON NANOTUBES AND AN OPTICAL METHOD FOR LIFE CONSUMPTION MONITORING OF ELECTRONIC ASSEMBLIESAuthors: Paul Casey, Davinder K. Anand, and Michael Pecht
Company: University of MD CALCE
Date Published: 2/18/2003 Conference: Pan Pacific Symposium
Life consumption monitoring of electronic assemblies can be cost-effectively done using optical strain measurement techniques. In this study, current output from an optical sensor can be used to interpret combined temperature and vibration histories. This may be accomplished by passing monofrequency light through optical fibers in a peripheral arrangement on a dummy chip. Any deviation from the null condition results in misalignment of the fibers, and hence reduction in intensity and current output.
With appropriate failure data at different stress levels, it is possible to determine damage and estimate the remaining life. The key challenges are to determine whether such an optical health monitoring scheme can be sufficiently accurate and robust, and whether the results can be applied to a variety of packages at any location on a circuit assembly.
Key words: nanotubes, coupling, strain sensing.
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