Dielectric composition for multilayer ceramic capacitor, multilayer ceramic capacitor, and method for manufacturing multilayer ceramic capacitor
US6876538B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2004 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | May 25, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/704
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed herein are a multilayer ceramic capacitor, a dielectric composition capable of sintering at a lower temperature and having a small variation in dielectric constant, a multilayer ceramic capacitor using the same, and a method thereof. The dielectric composition includes BaTiO3, MgCO3, Y2O3, Cr2O3, Mn2V2O7, and xBaO-yZrO2-zSiO2 acting as a sintering agent (where 0.1≦x≦0.3, 0.1≦y≦0.3 and 0.4≦z≦0.8, x+y+z=1), wherein when representing the composition with the formula aBaTiO3-bMgCO3-cY2O3-dCr2O3-e(Mn2V2O7)-f(xBaO-yZrO2-zSiO2), the ratio of the components satisfies the conditions of a=100, 0.1≦b≦3.0, 0.3≦c≦2.0, 0.05≦d≦0.2, 0.01≦e≦1.5, 0.5≦f≦3.0 based on the molar ratio. When manufacturing a multilayer ceramic capacitor of a higher capacitance, which is formed to have the thin layer structure of 4 μm or less, short circuits between internal electrodes and the deterioration in capacitance due to massing of the electrodes into ball at the ends may be remarkably reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.