The energetics of copper segregation to silicon surfaces were examined by measuring the Cu coverage after equilibration between Cu on the surface and internal Cu3Si, for which the Cu chemical potential is known. For oxide-free surfaces the Cu coverage was close to one monolayer on (111) surfaces but was much smaller on (100) surfaces. The Cu coverage was greatly reduced by oxide passivation of the surface. LEED showed the 7×7 structure of the clean (111) silicon surface converted to a quasiperiodic 5×5 structure after equilibrating with Cu3Si. The 2×1 LEED patterns for (100) surfaces indicated no change in surface structure due to the Cu3Si. These results show that the free energy of copper in Cu3Si is higher than that of copper on (111) surfaces but lower than that of copper on (100) surfaces.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
Mater. Res. Soc. Bull., Vol.19, No. 8, Aug. 1994.
E. R. Weber, Appl. Phys., A30, 1 (1983).
D. Gilles and E. R. Weber, Phys. Rev. Lett. 64, 196 (1990).
S. M. Myers and D. M. Follstaedt, J. Appl. Phys. 79, 1337 (1996).
S. M. Myers G. A. Petersen and C. H. Seager, J. Appl. Phys. 80, 3717 (1996).
D. M. Follstaedt, Appl. Phys Lett. 62, 1116 (1993).
A. Ishizaka and Y. Shiraki, J. Electrochem. Soc. 119, 666 (1986).
Le Thanh Vinh, M. Eddrief, C. A. Sebenne, P. Dumas, A. Taleb-Ibrahimi, R. Gunther, Y. J. Chabal and J. Derrien, Appl. Phys Lett. 64, 3308 (1994).
D. M. Follstaedt and S. M. Myers, Mat. Res. Soc. Symp. Proc. 316, 27 (1994).
M. Mundschau, E. Bauer, W. Telieps and W. Swiech, J. Appl. Phys. 65, 4747 (1989).
E. Daugy, P. Mathiez, F. Salvan and J. M. Layet, Surface Sci. 154, 267 (1985).
J. Zegenhagen, E. Fontes, F. Grey and J. R. Patel, Phys. Rev. B46, 1860 (1992).
H. Kemmann, F. Müller and H. Neddermeyer, Surface Sci. 192, 11 (1987).
R. B. Doak and D. B. Nguyen, Phys. Rev. 40, 1495 (1989).
J. E. Demuth, U. K. Koehler, R. J. Hamers and P. Kaplan, Phys. Rev. Lett. 62, 641 (1989).
K. Mortensen, Phys. Rev. Lett. 66, 461 (1991).
T. Ikeda, Y. Kawashima, H. Itoh, and T. Ichinokawa, Surface Sci. 336, 76 (1995).
P. Mathiez, E. Daugy, F. Salvan, J. J. Metois and M. Hanbücken, Surface Sci. 168, 158 (1986).
About this article
Cite this article
Wampler, W.R. Segregation of Copper to (100) and (111) Silicon Surfaces in Equilibrium with Internal Cu3Si Precipitates. MRS Online Proceedings Library 448, 371–376 (1996). https://doi.org/10.1557/PROC-448-371