| 摘要 |
A monolithic semiconductor ceramic capacitor includes semiconductor ceramic layers made of a semiconductor ceramic having a Sr site and a Ti site. The semiconductor ceramic satisfies the inequality 1.000<m<=1.020, wherein m represents the molar ratio of the Sr site to the Ti site. The semiconductor ceramic contains crystal grains and has grain boundary layers. The crystal grains contain a donor element such as La or Sm in the form of a solid solution. The grain boundary layers contain an acceptor element such as Mn, Co, Ni or Cr. The amount of the acceptor element therein is equal to or less than 0.5 mol (preferably 0.3 to 0.5 mol) per 100 mol of Ti. The crystal grains have an average size of 1.0 mum or less (preferably 0.5 to 0.8 mum). Therefore, the monolithic semiconductor ceramic capacitor has good electrical properties, good resistivity, good dielectric strength, and high reliability and is suitable for thin or compact apparatuses.
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