Bimetal Combination |
Intermetallic Compounds Formed |
Dominant Intermetallic Compounds |
Gold-Aluminum (Au-Al) |
Au5Al2,
Au2Al, AuAl2, AuAl, Au4Al [Philosky, 1970;
Philosky, 1971] |
Au5Al2,
Au2Al |
Copper-Aluminum (Cu-Al) |
CuAl2, CuAl, CuAl2,
Cu9Al4 [Olsen and James, 1984; Pitt and Needes, 1981;
Gershinskii, 1977; Campisano, 1978; Funamizu, and Watanabe, 1971] |
CuAl2 |
Gold-Silver (Au-Ag) |
Large silver diffusion into
the wire bulk along the wire length. Rapid silver surface diffusion resulted
in depletion at bond periphery. [James, 1977] |
|
Copper-Gold (Cu-Au) |
Cu3Au, CuAu, CuAu3
[Hall, 1975; Tu and Berry, 1972] |
Cu3Au |