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:
Jul. 29, 2025
Filed:
Nov. 16, 2021
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Printed Circuits, Inc., Shiga, JP;
Mec Company Ltd., Hyogo, JP;
Ryuta Ohsuka, Osaka, JP;
Koji Nitta, Osaka, JP;
Shoichiro Sakai, Osaka, JP;
Yoshihito Yamaguchi, Shiga, JP;
Masaharu Yasuda, Osaka, JP;
Akira Tsuchiko, Osaka, JP;
Koji Kasuya, Osaka, JP;
Kenji Nishie, Hyogo, JP;
Yu Fukui, Hyogo, JP;
SUMITOMO ELECTRIC INDUSTRIES. LTD., Osaka, JP;
SUMITOMO ELECTRIC PRINTED CIRCUITS, INC, Shiga, JP;
MEC COMPANY LTD., Hyugo, JP;
Abstract
A regenerating method of a removal liquid including: removing a nickel-chromium-containing layer from a substrate using the removal liquid at a time of manufacturing a printed circuit board by a semi-additive method, the substrate including the nickel-chromium-containing layer and a copper-containing layer; collecting the removal liquid that has been used; and contacting the collected removal liquid in collecting the removal liquid with a chelate resin, wherein the chelate resin includes a functional group represented by a following formula (1): where a plurality of Rs are identical divalent hydrocarbon groups having 1 to 5 carbons, and a portion of hydrogen atoms in the hydrocarbon groups are substituted with halogen atoms or not substituted with a halogen atom.