Abstract
Thin Ag-W films were prepared on Si (100) substrate and on metal (Ag and Co) seed layers by electroless technology for ULSI applications. The thin film electrical and physical parameters were studied as a function of the film composition. The thin film composition depends on the electroless bath formula. The role of the tungsten in silver matrix was studied via measurements of the film microhardness and thermal stability as function of the composition. The Ag-W films, thicker than 200 nm, exhibited a specific electrical resistivity of about 2μΩ* and a reflectivity larger than 90%. These films have not corroded in air at temperatures up to 200°C (thermal stable). Therefore, we assume that silvertungsten films can be used for applications where reliable conducting thin films is required, such as packaging and interconnects for microelectronics.
Similar content being viewed by others
References
N. Radic, A. Tonejc, M. Milun, P. Pervan, J. Ivkov, and M. Stubicar, Thin Solid Films 317, 996 (1998).
M. Uekudo, T. Oku, K. Nii, M. Murakami, K. Takahiro, S. Yamaguchi, T. Nakano, and T. Ohta, Thin Solid Films 286, 170 (1996).
M.H. Tsai, S.C. Sun, C.E. Tsai, S.H. Chuang, and H.T. Chiu, J. Appl. Phys. 79, 6932 (1996).
J. Imahori, T. Oku, and M. Murakami, Thin Solid Films 301, 142 (1997).
Y. Shacham-Diamand, Y. Sverdlov, N. Petrov, Li Zho, N. Croitoru, A. Inberg, E. Gileadi, A. Kohn, and M. Eizenberg, Electrochem. Technol. Appl. in Electron. III, ed. L.T. Romankiw et al. (Pennington, NJ: The Electrochem. Soc., 1999), p. 102.
Y. Shacham-Diamand and Y. Sverdlov, Microelectronic Engineering 50, 525 (2000).
Y. Wang and T.L. Alford, Appl. Phys. Lett. 74, 52 (1999).
Y. Wang, T.L. Alford, and J.W. Mayer, J. Appl. Phys. 86, 5407 (1999).
Y. Zeng, T.L. Alford, and Y.L. Zou, J. Appl. Phys. 83, 779 (1998).
Y. Shacham-Diamand, A. Inberg, Y. Sverdlov, and N. Croitoru, Electrochem. Technol. Appl. in Electron. III, ed. L.T. Romankiw et al. (Pennington, NJ: The Electrochem. Soc., 1999), p. 172.
Y. Shacham-Diamand, A. Inberg, Y. Sverdlov and N. Croitoru, J. Electrochem. Soc. 147, 3345 (2000).
A. Inberg, Y. Shacham-Diamand, E. Rabinovich, G. Golan, and N. Croitoru, Thin Solid Films (to be published).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Inberg, A., Shacham-Diamand, Y., Rabinovich, E. et al. Material and electrical properties of electroless Ag-W thin film. J. Electron. Mater. 30, 355–359 (2001). https://doi.org/10.1007/s11664-001-0043-x
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11664-001-0043-x