Glass for substrate, and glass substrate
US8580411B2 · kind B2 · utility
37Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Nov 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/73921
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To provide glass to be used for a substrate which is, as a substrate, less susceptible to surface roughening even if subjected to cleaning by means of a strongly acidic solution.Glass for a substrate, which comprises, as represented by mol % based on the following oxides, from 62.5 to 69% of SiO2, from 9 to 15.5% of Al2O3, from 8 to 16 of Li2O, from 0 to 8% of Na2O, from 0 to 7% of K2O and from 0 to 3.5% of ZrO2, provided that SiO2—Al2O3 is at least 53.3%, Li2O+Na2O+K2O is from 17 to 24%, and the total of contents of the above six components is at least 97%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.