Mechanical reliability of epoxy molding compounds in plastic packages of integrated circuits (IC) is greatly affected by the compound ability to absorb moisture. Accordingly, the objective of the study is to evaluate the effect of moisture sorption on the mechanical properties of the compound. Experimental studies were conducted to evaluate the moisture diffusion in compounds with different, from moderate to high, concentration of silica and alumina nitride fillers. The weight-gained analysis indicated that the moisture diffusion was of non-Fickian type and depended mainly on the specimen’s relative humidity and the filler concentration. We found that although the hygro-thermal stresses, caused by moisture diffusion, were relatively low, such diffusion led to an appreciable decrease in the compound’s strength. Moisture diffusion can result also in a substantial increase in the material’s plasticity. The obtained results can be helpful in the analysis of the mechanical behavior of molding compounds employed in electronic packaging. These results can be used to better understand and to improve the reliability of plastic packages of IC devices.
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March 2001
Technical Papers
Moisture Diffusion in Epoxy Molding Compounds Filled With Particles
M. Uschitsky,
M. Uschitsky
Bell Laboratories, Lucent Technologies, Inc., 600 Mountain Ave., Murray Hill, NJ 07974
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E. Suhir
E. Suhir
Bell Laboratories, Lucent Technologies, Inc., 600 Mountain Ave., Murray Hill, NJ 07974
Search for other works by this author on:
M. Uschitsky
Bell Laboratories, Lucent Technologies, Inc., 600 Mountain Ave., Murray Hill, NJ 07974
E. Suhir
Bell Laboratories, Lucent Technologies, Inc., 600 Mountain Ave., Murray Hill, NJ 07974
Contributed by the Electrical and Electronic Packaging Division for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received by the EEPD July 26, 2000; revised manuscript received September 2, 1998.
J. Electron. Packag. Mar 2001, 123(1): 47-51 (5 pages)
Published Online: September 2, 1998
Article history
Revised:
September 2, 1998
Received:
July 26, 2000
Citation
Uschitsky, M., and Suhir, E. (September 2, 1998). "Moisture Diffusion in Epoxy Molding Compounds Filled With Particles ." ASME. J. Electron. Packag. March 2001; 123(1): 47–51. https://doi.org/10.1115/1.1325009
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