Ceramic, preparation thereof and electronic circuit substrate by use thereof
US4759965A · kind A · utility
30Cited by
4References
61Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A ceramic comprises therein two or more dielectric portions having different dielectric constants formed by filling of one or more vacant spaces provided within a dielectric porcelain, a semiconductor porcelain as a precursor of said dielectric porcelain or a molded product as a precursor of said semiconductor procelain with one or more kinds of materials capable of becoming to have different dielectric constants from said dielectric porcelain and subsequent calcination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.