Frits for use in vacuum insulating glass (VIG) units, and/or associated methods
US10421684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2018 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | May 3, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B3/6775
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Certain example embodiments of this invention relate to vacuum insulating glass (VIG) units having improved seals made using two different frit-based edge seal materials, and/or methods of making the same. In certain example embodiments, a first frit material is applied around peripheral edges of first and second glass substrates. The first frit material, which may be bismuth-based in certain example embodiments, is fired with a heat treatment (e.g., thermal tempering) process. A second frit material, which may be VBZ-based in certain example embodiments, is applied and at least partially overlaps with the fired first frit material. The first frit material acts as a primer, and the second frit material helps seal together the VIG unit. The second frit material is fired at a significantly lower temperature that enables the glass to retain the temper or other strength imparted by the heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.