Resumen de Young's modulus of a sintered Cu joint and its influence on thermal stress
T. Ishizaki, D. Miura, A. Kuno, K. Hasegawa, M. Usui, Y. Yamada
Abstract Al2O3 chips and pure Cu plates were joined by Cu nanoparticles at 250 °C and 350 °C, and the Young's moduli of the sintered Cu were evaluated by nanoindentation tests. The average Young's moduli were 52.7 ± 19.8 GPa and 76.5 ± 29.7 GPa at 250 °C and 350 °C, respectively, indicating that the sintered structures were strengthened at higher temperatures. The calculation results indicated that the joint at 350 °C has a high Young's modulus, but make the stress higher than the chip strength, resulting in breakage of the chip during 65/250 °C power cycling.
