Etchant composition and manufacturing method of display device using the same
US12312528B2 · kind B2 · utility
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Key dates
| Filing date | May 26, 2022 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Dec 3, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/103
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An etchant composition includes: an inorganic acid compound at 9.0 wt % to 9.9 wt %; an inorganic salt compound at 5.0 wt % to 10.0 wt %; an organic acid compound at 35 wt % to 45 wt %; a lactate-based compound at 10 wt % to 20 wt %; a nitrogen cyclic compound containing oxygen at 0.1 wt % to 1.0 wt %; and a remaining amount of water such that a total weight of the etchant composition is 100 wt %, wherein the inorganic acid compound is an etchant composition having an acid dissociation constant (pKa) value of −1.0 to −3.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.