Duplex glass preforms for hermetic glass-to-metal sealing
US4716082A · kind A · utility
15Cited by
30References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Oct 28, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A duplex glass preform for forming hermetic glass-to-metal seals. The duplex glass preform comprises a glass infrastructure or matrix having at least one end thereof modified by the selective distribution therein of ceramic particles. The ceramic particles are selectively distributed to form a ceramic density gradient having the largest concentration of ceramic particles at the surface and gradually decreasing with depth. The duplex glass preform of the present invention has utility in forming glass-to-metal seals in hybrid metal packages containing microcircuit chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.