Low temperature sintering route for aluminum nitride ceramics
US5541145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1995 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Jun 12, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/901
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An aluminum nitride ceramic having desired properties suitable for electronic packaging applications can be prepared from a novel aluminum nitride powder/sintering aid mixture. The sintering aid comprises a glassy component formed from alumina, calcia and boria, and a non-vitreous component comprising an element or compound of a metal of Group IIa, IIIa, or the lanthanides, preferably crystalline oxides, reactibis with the crystallized glass component and the alumina from the Al N grains. Alternatively, the sintering aid comprises a multi-component glass composition capable of forming the above components upon melting and thereafter crystallizing upon reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.