Dielectric ceramic composition and method for producing the same, and device for communication apparatus using the same
US6579817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jan 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/0306
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic composition including at least a first component containing Al2O3, MgO and ROa (R is at least one element selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Tb and Gd; a is a value stoichiometrically determined in accordance with the valence of R); SiO2 as a second component; and a third component containing a glass composition including two or more components containing at least one selected from the group consisting of SiO2 and B2O3. A dielectric ceramic composition stably has a high strength in a high frequency band such as microwave, millimeter wave, etc., and has a small dielectric constant, a low loss, and a small temperature constant at capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.