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:
May. 26, 2022
Samsung Display Co., Ltd., Yongin-si, KR;
Jong Hee Park, Hwaseong-si, KR;
Hyoung Sik Kim, Seoul, KR;
Sang Hyuk Lee, Incheon, KR;
Yong Hoe Kim, Incheon, KR;
Young Kwang Kim, Incheon, KR;
Dong Ho Kang, Incheon, KR;
Hyun-Cheol Shin, Incheon, KR;
Sung-Tae Kim, Cheonan-si, KR;
Dong Hun Lee, Asan-si, KR;
Min Hye Lee, Pyeongtaek-si, KR;
Byung Su Lee, Gwangmyeong-si, KR;
Ki Su Jung, Cheonan-si, KR;
SAMSUNG DISPLAY CO., LTD., Yongin-si, KR;
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.