Hot pressing dense ceramic sheets for electronic substrates and for multilayer electronic substrates
US4920640A · kind A · utility
21Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49165
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Dense ceramic sheets suitable for electronic substrates are prepared by hot pressing ceramic green sheets containing ceramic powder and organic binders which leave no undesirable residue upon pyrolysis in the absence of oxygen. Boron nitride sheets made of boron nitride powder in a similar binder are placed on each side of the ceramic green sheet to form a composite. After hot pressing the composite so as to remove the binder and densify the ceramic, the BN layers are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.