Method and materials for increasing the strength of crystalline ceramic
US6258191A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Sep 16, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/901
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Multilayer glass ceramic substrate electronic components having enhanced flexibility and strength are prepared using greensheets as a top and/or bottom layer, which greensheets are made from a glass-ceramic greensheet casting composition comprising crystallizable glass, a binder resin and a solvent system, and preferably a plasticizer. The top and/or bottom greensheets have a lower coefficient of thermal expansion (CTE) than the greensheets used to make the internal layers of the MLC and both greensheets are characterized by having, after sintering, a microstructure which is greater than 99% crystalline. A crystalline matrix forming material such as P.sub.2 O.sub.5 is preferably used in the composition. This type structure, in combination with the lower CTE, has been found to provide an MLC having enhanced strength and flexibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.