US 5,335,139 A · Multilayer ceramic chip capacitor

Abstract

A multilayer ceramic chip capacitor includes alternately stacked dielectric layers and internal electrode layers. The dielectric layers contain barium titanate as a major component and magnesium oxide, manganese oxide, barium oxide and/or calcium oxide, silicon oxide and optionally, yttrium oxide as minor components in such a proportion that there are present 0.1-3 mol of MgO, 0.05-1.0 mol of MnO, 2-12 mol of BaO+CaO, 2-12 mol of SiO.sub.2 and up to 1 mol of Y.sub.2 O.sub.3 per 100 mol of BaTiO.sub.3. The capacitor satisfies the standard temperature dependence of capacitance and shows a minimized change of capacitance with time under an applied DC electric field and a long insulation resistance life. Where the dielectric layers contain 0.1-3 mol of MgO, 1-5 mol of Y.sub.2 O.sub.3, 2-12 mol of BaO+CaO, and 2-12 mol of SiO.sub.2 per 100 mol of BaTiO.sub.3, the capacitor shows improved DC bias performance.

Claims16

Dependent claims

A multilayer ceramic chip capacitor comprising alternately stacked dielectric layers and internal electrode layers, wherein

said dielectric layers contain barium titanate as a major component and magnesium oxide, manganese oxide, at least one of barium oxide and calcium oxide, and silicon oxide as minor components in such a proportion that there are present
MgO:
0.1-3 mol
MnO:
0.05-1.0 mol
BaO+CaO:
2-12 mol
SiO.sub.2 :
2-12 mol
per 100 mol of BaTiO.sub.3, provided that the barium titanate, magnesium oxide, manganese oxide, barium oxide, calcium oxide, and silicon oxide are calculated as BaTiO.sub.3, MgO, MnO, BaO, CaO, and SiO.sub.2, respectively.

7 more elements

Dependencies are inferred from the claim text.

Multilayer ceramic chip capacitor

Life of this patent

Multilayer ceramic chip capacitor

Life of this patent

Abstract

Claims16