Abstract
Polysilicon microfracture specimens were fabricated using surface micromachining techniques identical to those used to fabricate microelectromechanical systems (MEMS) devices. The nominal critical J-integral (the critical energy release rate) for crack initiation, Jc, was determined in specimens whose characteristic dimensions were of the same order of magnitude as the grain size of the polysilicon. Jc values ranged from 16 to 62 N/m, approximately a factor of four larger than Jc values reported for single crystal silicon.
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J. A. Connally and S. B. Brown, Science 256, 1537 (1992).
L. S. Fan, R. T. Howe, and R. S. Muller, Sensors and Actuators A21–A23, 872 (1990).
F. Ericson and J. A. Schweitz, J. Appl. Phys. 68, 5840 (1990).
S. Johansson, F. Ericson, and J. A. Schweitz, J. Appl. Phys. 65, 122 (1989).
H. Kahn, S. Stemmer, K. Nandakumar, R. L. Mullen, R. Ballarini, M. A. Huff, and A. H. Heuer, IEEE Proc. 9th Annual Int. Workshop on Microelectromechanical Systems, San Diego, CA, 343 (1996).
T. I. Kamins and T. R. Cass, Thin Solid Films 16, 147 (1973).
A. van der Drift, Philips Res. Repts. 22, 267 (1967).
S. W. Freiman, Bull. Am. Ceram. Soc. 67 (2), 392 (1988).
J. Sakata, Toyota Central Research and Development Laboratories, Nagakute, Aichi 480-11, Japan, private communication, October 21, 1996.
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Ballarini, R., Mullen, R.L., Yin, Y. et al. The fracture toughness of polysilicon microdevices: A first report. Journal of Materials Research 12, 915–922 (1997). https://doi.org/10.1557/JMR.1997.0131
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DOI: https://doi.org/10.1557/JMR.1997.0131