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. 26, 2023
Filed:
Apr. 27, 2021
Applicant:
Echem Solutions Corp., Taoyuan, TW;
Inventors:
Yu-Ning Chen, Taoyuan, TW;
Ming-Che Chung, Taoyuan, TW;
Assignee:
eChem Solutions Corp., Taoyuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 13/02 (2006.01); C08J 7/12 (2006.01);
U.S. Cl.
CPC ...
C09K 13/02 (2013.01); C08J 7/12 (2013.01);
Abstract
An etchant composition, a tackifier, an alkaline solution, a method of removing polyimide and an etching process are provided. The etchant composition includes a tackifier (A) and an alkaline solution (B). The tackifier (A) includes a resin containing a hydroxyl group (a), a surfactant (b) and a first solvent (c1). The alkaline solution (B) includes an alkaline compound (d) and a second solvent (c2).