Low-melting lead-free bismuth sealing glasses
US9540274B2 · kind B2 · utility
1Cited by
6References
24Claims
0Family size
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Key dates
| Filing date | Apr 15, 2011 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Nov 5, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1314
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glasses comprising Bi203, ZnO B203 and optionally a colorant including an oxide of a metal such as iron, cobalt, manganese, nickel, copper and chromium are suitable to form hermetic seals in solar cell modules, architectural glass windows and MEMS devices. Glass frit and paste compositions suitable for flow and bonding to various substrates—glass, metal, silicon, in the temperature range of 400-500 degrees Centigrade. The broad compositional range in mole % is 25-70% Bi203, up to 65% ZnO, and 1-70% B203. Such glasses do not have batched in alumina or silica. Such glasses lack alumina and silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.