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:
Jun. 09, 2026
Filed:
Mar. 16, 2023
Samsung Display Co., Ltd., Yongin-si, KR;
Youngrok Kim, Anyang-si, KR;
Kyu-Soon Park, Yongin-si, KR;
Jong-Hyun Choung, Suwon-si, KR;
Woo Jin Cho, Yongin-si, KR;
Gyu PO Kim, Incheon, KR;
Sung Min Kim, Incheon, KR;
Jae Myeong Kim, Incheon, KR;
Hyun Cheol Shin, Incheon, KR;
Jun Dong Kim, Incheon, KR;
Jun Young Hawng, Incheon, KR;
Samsung Display Co., Ltd., Yongin-Si, KR;
Abstract
Embodiments provide an etchant composition that includes about 5.0 to about 20.0 wt % of a persulfate, about 0.01 to about 15.0 wt % of a sulfonic acid, about 0.01 to about 2.0 wt % of a fluorine compound, about 0.01 to about 5.0 wt % of a 4-nitrogen cyclic compound, about 0.01 to about 1.0 wt % of an amino acid including a hydrophobic group having at least two carbon atoms, and water A weight ratio of the amino acid to the 4-nitrogen cyclic compound is in a range of about 1:16 to about 1:60.