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TECHNICAL PAPERS

Mechanical Characterization of the Heat Affected Zone of Gold Wirebonds Using Nanoindentation

[+] Author and Article Information
Mithilesh Shah

Singapore-MIT Alliance, National University of Singapore, Singapore

Kaiyang Zeng

Institute of Materials Research and Engineering, Singapore

Andrew A. O. Tay

Dept. of Mechanical Eng., National University of Singapore, Singapore

J. Electron. Packag 126(1), 87-93 (Apr 30, 2004) (7 pages) doi:10.1115/1.1648062 History: Received October 01, 2003; Online April 30, 2004
Copyright © 2004 by ASME
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References

Figures

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Mass spectrum of the gold wire specimen analyzed using TOF-SIMS
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Graph depicting the heat flow during DSC against temperature for gold wire specimen
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A typical Load-Depth curve for an indentation with maximum 11 mN load. The indentation is of multiple load-partial unload type.
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Hardness variation with depth for 3 mN maximum load
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Hardness variation with depth for 5 mN maximum load
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Hardness variation with depth for 7 mN maximum load
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Hardness variation with depth for 9 mN maximum load
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Hardness variation with depth for 11 mN maximum load
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Hardness variation with depth for 15 mN maximum load
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Hardness variation with depth for 20 mN maximum load
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The hardness variation with distance from the neck of the ball in gold wirebond
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Microstructure of Heat affected zone showing grain size distribution (500X)
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The suggested yield strength variation with distance from the neck of the ball
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A generalized HRB diagram showing variation of HAZ length with different ball sizes for wires with different recrystallization temperatures

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