Non-reducible dielectric ceramic material, making method, and multilayer ceramic capacitor
US6329311A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2000 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | May 30, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/1245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In conjunction with the manufacture of a multilayer ceramic capacitor having nickel-containing internal electrodes involving a polishing step for exposing the end of the internal electrodes, a non-reducible dielectric ceramic material is prepared, for the purpose of preventing the polishing step from being prolonged, by furnishing a calcined material containing a compound oxide represented by the formula (I): EQU [(Ca.sub.x Sr.sub.1-x)O].sub.m [(Ti.sub.y Zr.sub.1-y)O.sub.2 ] wherein 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.0.10, and 0.75.ltoreq.m.ltoreq.1.04, as a main component, adding 0.001-10 mol % based on the main component of MgO or rare earth oxide and firing the mixture. The ceramic material contains predetermined amounts of SiO.sub.2 and BaO and/or CaO, and MnO as auxiliary components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.