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TECHNICAL PAPERS

Thermoelastic Behavior of Filled Molding Compounds: Composite Mechanics Approach

[+] Author and Article Information
M. Uschitsky, E. Suhir, G. W. Kammlott

Lucent Technologies, Bell Laboratories, Inc., 600 Mountain Ave. Murray Hill, NJ 07974

J. Electron. Packag 123(3), 260-267 (Jan 11, 2000) (8 pages) doi:10.1115/1.1349422 History: Received January 11, 2000
Copyright © 2001 by ASME
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References

Figures

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The areas shown in patterns (from left to right) reflect the relationships between the effective elastic moduli and the concentration of filler (inclusions) in the dispersioned-hardened alloys, metal-matrix composites, polymer-matrix composites and molding compounds, respectively. The two curves show dependencies of Reuss’ and Voight’s elastic moduli on the concentration of fillers.
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The “composite spheres” (a) and “self-consistent” models (b) of particulate composites
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The effect of fillers on the effective shear modulus. The curves shown reflect predictions based on the “dilute,” (G/Gm)des, “nondilute,” (G/Gm)ndes, and “low boundary estimate,” (G/Gm)lbe, models.
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The dependencies (k/km)lbe and (k/km)ndes illustrate the effect of fillers on the effective bulk modules in accordance with formulas (A10) and (A12)
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The curves marked “nrt” and “nct” illustrate the effect of fillers on the Poisson’s ratio at room temperature and at high (≈120°C) temperature
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The curves illustrate the effect of fillers on the normalized thermal expansion coefficient αi/am in the cases of non-dilute suspension (marked “ndes”) and low boundary estimate (marked “lbe”) approximations
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The curves marked (a/am)1, (a/am)2, and (a/am)3, illustrate the effect of the thermal expansion coefficient ratio, αi/am, of the constituent materials, varied from 0.01; through 0.1; and to 0.2 on the effective expansion coefficient
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Overall thermal stress in the molding material at room and curing temperature conditions
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The microstructure of Sumitomo compound filled with the pulverized particles
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The average strength of both the original compound and compounds filled additionally with 10 percent and 15 percent of the aluminum nitride
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The averaged effective Young’s modulus of original compound and compounds filled additionally with 10 percent and 15 percent of aluminum nitride
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The averaged maximum bending strain of original compound and compounds filled additionally with 10 percent and 15 percent of aluminum nitride

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