Current Applied Physics

Korean Physical Society (한국물리학회)
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Degradation behaviors and failure analysis of $Ni-BaTiO_3$ base–metal electrode multilayer ceramic capacitors under highly accelerated life test

Kim, Jung-Woo;Yoon, Dong-Cheol;Jeon, Min-Seok;Kang, Do-Won;Kim, Jeong-Wook;Lee, Hee-Soo

  • Published : 20100000
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Abstract

The degradation in insulation resistance under highly accelerated test conditions was investigated in terms of micro-structural and micro-chemical changes in dielectric layer of multilayer ceramic capacitor. The ceramic capacitors were prepared by using $BaTiO_3$ powder with different size of 0.52 $\mu{m}$, 0.55 $\mu{m}$, and 0.58 $\mu{m}$. As the particle size of $BaTiO_3$ powder was increased, the capacitance and the dissipation factor were decreased. According to the result of highly accelerated test conducted at 150 ${^{\circ}C}$, 75 V, and 20 h, failure in insulation resistance was increased with the particle size and the calculated FITs (failure in term) were 1.10 at 0.52 $\mu{m}$, 2.11 at 0.55 $\mu{m}$, and 6.69 at 0.58 $\mu{m}$, respectively. The failure was examined by X-ray photoelectron spectroscopy and transmission electron microscopy, which was attributed to the oxidation of Ni inner electrode that could create oxygen vacancies and increase electric conduction of the ceramic capacitors.

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References

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