Etchant and method for manufacturing display device using the same
US10636666B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Oct 10, 2019 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Oct 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K71/231
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An etchant includes about 8 wt % to about 12 wt % of nitric acid, about 3 wt % to about 8 wt % of alkylsulfonic acid, about 7 wt % to about 12 wt % of a sulfate, about 40 wt % to about 55 wt % of an organic acid, about 0.5 wt % to about 5 wt % of an organic acid salt, and a balance of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.