Abstract
The formation of the ordered compounds, CusAu and CuAu, has been observed in a study primarily aimed at determining the rate of interdiffusion in the gold-copper system. In the planar diffusion couples aged at temperatures from 50°C to 400°C and for times to 4 years, the compounds were observed to form as layers at the goId/copper interface for temperatures under 400°C. The layers were visible in the scanning electron microscope backscattered image of polished cross-sections, and their compositions were determined by the corresponding plateaus observed in the electron microprobe X-ray intensity profiles. Kirkendall type porosity was also observed to form in the copper-rich zone adjacent to the ordered compound layers. These results are compared and contrasted to the findings of several other studies which have considered this reaction and its practical implications to device performance.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
R. E. Scott:Encyclopedia of X-rays and Gamma Rays, G. L. Clark, ed., pp. 41–50, Reinhold Pub. Co., N. Y., 1963.
H. G. Tompkins and M. R. Pinnel:J. Appl. Phys., 1976, vol. 47, pp. 3804–12.
P. M. Hall and J. M. Morabito:Surface Science, 1976, vol. 59, pp. 624–30.
P. M. Hall, J. M. Morabito and N. T. Panousis:Thin Solid Films, 1977, vol. 41, pp. 341–61.
M. R Pinnel and J. E. Bennet:Met. Trans., 1972, vol. 3, pp. 1987–97.
K. N. Tu and B. S. Berry:J. Appl. Phys., 1972, vol. 43, pp. 3283–90.
J. A. Borders:Thin Solid Films, 1973, vol. 19, pp. 359–70.
P. M. Hall, N. T. Panousis and P. R. Menzel:IEEE Trans, on Parts, Hybrids and Packaging, 1975, vol. PHP-11, pp. 202–05.
L. G. Feinstein and B. J. Snyder: Bell Telephone Labs, Allentown, Pa., unpublished research, 1978.
J. W. Colby:Advan. X-ray Analysis, 1968, vol. 11, pp. 287–305.
C. C. Lo and D. E. Schuele:J. Appl. Phys., 1975, vol. 46, pp. 5004–09.
M. Hansen and K. Anderko:Constitution of Binary Alloys, 2nd ed., p. 199, McGraw-Hill Book Co., New York, 1958.
Ch. J. Raub, H. R. Khan, and J. Lendvay:Gold Bulletin, 1976, vol. 9, pp. 123–28.