Phosphate-based ceramic compositions with low dielectric constant and method for manufacturing dielectric substrate using the same
US7138351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2003 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Nov 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9615
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed herein is a phosphate-based dielectric ceramic composition which has a low dielectric constant and a low dielectric loss in the high-frequency bands such as microwave and millimeter wave. The composition is represented by the following formula: (1-x)(A′1-yA″y)O-xP2O5 wherein x and y are numbers satisfying the following conditions: 0 <×<1 and 0≦y≦1, and A′ and A″ are each independently selected from the group consisting of Ca, Ba, Sr, Zn, Mb, Ni, Mn and Cu. The composition may further include a sintering assistant and an additive. Since the composition can be sintered at a temperature as low as 1,000° C., it can be simultaneously calcined together with a metal electrode such as silver, copper or silver/palladium electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.