Laser-processable glass substrate and laser processing method
US6262389A · kind A · utility
10Cited by
6References
11Claims
0Family size
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Key dates
| Filing date | Sep 22, 1998 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Sep 22, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/315
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sheet of silicate glass having a thickness of 2 mm and composed mainly of SiO.sub.2, and containing Al.sub.2 O.sub.3, B.sub.2 O.sub.3, Na.sub.2 O, F, etc., is immersed in a molten salt comprising a mixture of 50 mol % of silver nitrate and 50 mol % of sodium nitrate. Na ions in the surface of the glass are eluted, diffusing Ag ions in the molten salt into the glass. When a laser beam is applied to the glass substrate thus formed, the glass substrate is evaporated or ablated progressively from its surface. The glass substrate is processed to a smooth finish without causing cracking or breakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.