Monolithic ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsHiroyuki Wada, Harunobu Sano, Norihiko Sakamoto
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AssigneeMurata Manufacturing Co., Ltd.
InventorsHiroyuki Wada, Harunobu Sano, Norihiko Sakamoto
Estimating the term…
A monolithic ceramic capacitor has dielectric ceramic layers of a material comprising barium titanate having alkali metal oxides impurities in an amount of not more than about 0.02% by weight, manganese oxide, cobalt oxide, and nickel oxide; from about 0.5 to 5.0 mols MgO to 100 mols of a main constituent shown by the following composition formula; (1-.alpha.-.beta.-.gamma.){BaO}.sub.m.TiO.sub.2 +.alpha.M.sub.2 O.sub.3 +.beta.Re.sub.2 O.sub.3 +.gamma.(Mn.sub.1-x-y Ni.sub.x Co.sub.y)O wherein M.sub.2 O.sub.3 is at least one of Sc.sub.2 O.sub.3 and Y.sub.2 O.sub.3 ; Re.sub.2 O.sub.3 is at least one of Sm.sub.2 O.sub.3 and Eu.sub.2 O.sub.3 and .alpha., .beta., .gamma., m, x, and y are 0.0025.ltoreq..alpha.+.beta..ltoreq.0.025 0.ltoreq..beta..ltoreq.0.0075 0.0025.ltoreq..gamma..ltoreq.0.05 .gamma./(.alpha.+.beta.).ltoreq.4 0.ltoreq.x<1.0 0.ltoreq.y<1.0 0.ltoreq.x+y<1.0 1.000<m.ltoreq.1.035; an Li.sub.2 O--B.sub.2 O.sub.3 --(Si, Ti)O.sub.2 oxide glass in an amount of from about 0.2 to 3.0 parts by weight to 100 parts by weight of the sum total of the main constituent and the magnesium oxide, and the internal electrodes are constituted by nickel or a nickel alloy.
A monolithic ceramic capacitor comprising at least three dielectric ceramic layers, at least two internal electrodes between adjacent dielectric ceramic layers such that an end of each of the internal electrodes is exposed at a different side surface of said capacitor, and external electrodes electrically connected to the exposed internal electrodes, wherein the dielectric ceramic layers comprise a main component comprising (a) barium titanate having a content of alkali metal oxides impurities in an amount of not more than about 0.02% by weight, (b) at least one member selected from the group consisting of scandium oxide and yttrium oxide, (c) at least one member selected from the group consisting of samarium oxide and europium oxide, and (d manganese oxide, cobalt oxide and nickel oxide, said main component having the following composition formula
Dependencies are inferred from the claim text.