This paper investigates the effect of the anisotropic behavior of the die and the time- and temperature-dependent behavior of epoxy molding compound on the packaging induced stresses for a quad flat package. Finite element (FE) simulations using isotropic and anisotropic properties of the die are carried out, respectively, and the results are compared. Creep experiments were performed at different temperatures ranging from −65°C to 230°C to obtain the long-term master curves and the related shift factors for the creep compliance of the molding compound. FE models which incorporate the viscoelastic constitutive relation of the material are constructed to simulate the thermo-mechanical stresses caused by the packaging processes. The influences of both the chip anisotropy and the viscoelastic behavior of the molding compound on the packaging induced stresses are discussed.
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e-mail: willem.van.driel@philips.com
e-mail: l.j.ernst@wbmt.tudelft.nl
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December 2003
Technical Papers
Packaging Induced Die Stresses—Effect of Chip Anisotropy and Time-Dependent Behavior of a Molding Compound
W. D. van Driel,
W. D. van Driel
Philips Semiconductors, ATO Innovation, P.O. Box 30008, 6534 AE Nijmegen, The Netherlands
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J. H. J. Janssen,
e-mail: willem.van.driel@philips.com
J. H. J. Janssen
Philips Semiconductors, ATO Innovation, P.O. Box 30008, 6534 AE Nijmegen, The Netherlands
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D. G. Yang,
D. G. Yang
Delft University of Technology, P.O. Box 5033, 2600 GA Delft, The Netherlands
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L. J. Ernst
e-mail: l.j.ernst@wbmt.tudelft.nl
L. J. Ernst
Delft University of Technology, P.O. Box 5033, 2600 GA Delft, The Netherlands
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W. D. van Driel
Philips Semiconductors, ATO Innovation, P.O. Box 30008, 6534 AE Nijmegen, The Netherlands
J. H. J. Janssen
Philips Semiconductors, ATO Innovation, P.O. Box 30008, 6534 AE Nijmegen, The Netherlands
e-mail: willem.van.driel@philips.com
G. Q. Zhang
D. G. Yang
Delft University of Technology, P.O. Box 5033, 2600 GA Delft, The Netherlands
L. J. Ernst
Delft University of Technology, P.O. Box 5033, 2600 GA Delft, The Netherlands
e-mail: l.j.ernst@wbmt.tudelft.nl
Contributed by the Electronic and Photonic Packaging Division for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received November 2002. Associate Editor: L. Ernst.
J. Electron. Packag. Dec 2003, 125(4): 520-526 (7 pages)
Published Online: December 15, 2003
Article history
Received:
November 1, 2002
Online:
December 15, 2003
Citation
van Driel , W. D., Janssen, J. H. J., Zhang, G. Q., Yang , D. G., and Ernst, L. J. (December 15, 2003). "Packaging Induced Die Stresses—Effect of Chip Anisotropy and Time-Dependent Behavior of a Molding Compound ." ASME. J. Electron. Packag. December 2003; 125(4): 520–526. https://doi.org/10.1115/1.1604153
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