Laminated ceramic capacitor and method of manufacturing laminated ceramic capacitor
AssigneeTaiyo Yuden Co., Ltd.
InventorYusuke KOWASE
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Abstract
One object is to improve the insulation reliability of a laminated ceramic capacitor. The body of a laminated ceramic capacitor according to one embodiment includes a first internal electrode layer, a second internal electrode layer, and a ceramic layer. The ceramic layer is disposed between the first internal electrode layer and the second internal electrode layer and contains crystal grains of ceramic material. The crystal grains each include a core portion and a shell portion covering the core portion. The shell portion includes one or more intra-shell pores.
Claims11
A laminated ceramic capacitor, comprising:
- a body having a first internal electrode layer, a second internal electrode layer, and a ceramic layer disposed between the first internal electrode layer and the second internal electrode layer and containing crystal grains of ceramic material;
- a first external electrode provided on the body so as to be electrically connected to the first internal electrode layer;
- and
- a second external electrode provided on the body so as to be electrically connected to the second internal electrode layer,
- wherein the crystal grains each include a core portion and a shell portion covering the core portion, and
- wherein the shell portion includes one or more intra-shell pores.
A method of manufacturing a laminated ceramic capacitor, the method comprising:
- a powder preparation step of preparing composite ceramic particles, the composite ceramic particles including a first ceramic particle and a plurality of second ceramic particles adhered to a surface of the first ceramic particle, each of the plurality of second ceramic particles having a smaller diameter than the first ceramic particle and having one or more intra-particle pores;
- a step of forming a laminate, the laminate including a ceramic green sheet and internal electrode patterns, the ceramic green sheet containing the composite ceramic particles, the internal electrode patterns being provided on a first surface and a second surface of the ceramic green sheet;
- and
- a step of firing the laminate.
Dependencies are inferred from the claim text.