Dielectric ceramic composition and multi-layer capacitor
US5094987A · kind A · utility
4Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1990 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Aug 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/1254
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Dielectric ceramic composition consisting essentially of substance selected from those represented by the following formula: EQU Pb.sub.1-x+a Me.sub.x {(Zn.sub.1/3 Nb.sub.2/3)1.sub.-y-z Ti.sub.y (Cu.sub.b M.sub.1-b).sub.2 }O.sub.3+a wherein Me is at least one element selected from Sr and Ba; M is at least one element selected from Nb, Ta and W; x and y are within the scope shown in FIGS. 1, 3 or 2; and O.ltoreq.a.ltoreq.0.1, 0.02.ltoreq.b.ltoreq.1.0, 0.002.ltoreq.bz.ltoreq.0.04. Multi-layer capacitors having dielectric layers made of the dielectric ceramic composition exhibit a good temperature coefficient of capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.