Process for cofiring structure comprised of ceramic substrate and refractory metal metallization
US4678683A · kind A · utility
15Cited by
10References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 13, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Dec 13, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/4629
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cofired structure comprised of a refractory metal metallization supported by a substrate free of large voids is produced by forming a liquid phase sinterable ceramic composition containing SiO.sub.2 in some form and a sulfate of an alkali metal and/or an alkaline earth metal, admixing the composition with an organic binding medium, shaping the mixture into a thin sheet, contacting the sheet with refractory metal metallization material, and cofiring the resulting structure whereby the free carbon produced by pyrolysis of the organic medium is removed by reaction with the sulfate before closed porosity is initiated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.