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:
Dec. 30, 2025
Filed:
May. 10, 2023
Jaewon Industrial Co., Ltd, Jeollanam-do, KR;
Sung Won Shim, Jeollanam-do, KR;
Byung Ki Son, Daejeon, KR;
Yung Lim, Seoul, KR;
Hwan Choi, Jeollanam-do, KR;
Youn Soo Shin, Jeollanam-do, KR;
Min Young Kim, Jeollanam-do, KR;
Tae Gi Choi, Jeollanam-do, KR;
JAEWON INDUSTRIAL CO., LTD, Jeollanam-do, KR;
Abstract
In a method for purifying highly pure isopropyl alcohol used in a semiconductor cleaning process, diacetone alcohol present in isopropyl alcohol is removed by an adsorption process, and diacetone alcohol, triisopropyl borate, and metal impurities are removed by a distillation process. The purified isopropyl alcohol may have a purity of has the moisture of 10 ppm or less, the triisopropyl boron compound of 50 ppt or less, and each metal of the metal impurities of 20 ppt or less.