The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
Dec. 30, 2021
Samsung Display Co., Ltd., Yongin-si, KR;
Bong-Kyun Kim, Hwaseong-si, KR;
Changwoo Kwon, Seoul, KR;
Seungbo Shim, Asan-si, KR;
Ilbae Ahn, Asan-si, KR;
Seokjun Jang, Cheonan-si, KR;
Jinsuek Kim, Hwaseong-si, KR;
Ji-Hun Park, Asan-si, KR;
Yong-Su Lee, Cheonan-si, KR;
Yangil Jeon, Asan-si, KR;
Gyu-Po Kim, Incheon, KR;
Sang-Woo Kim, Seongnam-si, KR;
Hyun-Cheol Shin, Incheon, KR;
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
An etchant composition of an embodiment may etch a multi-layered film of titanium/copper and may include about 5 wt % to about 20 wt % of persulfate, about 0.1 wt % to about 5 wt % of phosphoric acid or phosphate, about 0.01 wt % to about 2 wt % of a carbonyl ring compound, about 0.01 wt % to about 1 wt % of a 3-nitrogen ring compound, about 0.1 wt % to about 2 wt % of a 4-nitrogen ring compound, about 0.1 wt % to about 0.9 wt % of a fluorine compound, about 0.1 wt % to about 0.5 wt % of hydrogen about 1 wt % to about 3 wt % of a zwitterionic compound, and sulfate, water which is included in an amount that makes the total weight of the entire composition about 100 wt %.