Dielectric ceramic composition and multilayer mircowave device employing the same
US5273944A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1993 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Feb 8, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dielectric ceramic composition which consists essentially of bismuth oxide, calcium oxide and niobium oxide, wherein when the dielectric ceramic composition is expressed by a formula xBiO.sub.3/2 -yCaO-zNbO.sub.5/2 and the x, y and z are plotted in a ternary system diagram so as to total 1.0, the x, y and z fall in a region enclosed by a pentagon having the following vertexes A, B, C, D and E, PA0 A: (x, y, z)=(0.55, 0.16, 0.29) PA0 B: (x, y, z)=(0.5, 0.21, 0.29) PA0 C: (x, y, z)=(0.44, 0.24, 0.32) PA0 D: (x, y, z)=(0.44, 0.2, 0.36) and PA0 E: (x, y, z)=(0.5, 0.175, 0.325); and PA0 a multilayer microwave device including a dielectric layer formed by the dielectric ceramic composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.