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:
Oct. 21, 2025
Filed:
Nov. 22, 2021
Applicant:
Ishihara Chemical Co., Ltd., Kobe, JP;
Inventors:
Assignee:
ISHIHARA CHEMICAL CO., LTD., Kobe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23G 1/02 (2006.01); C25D 5/48 (2006.01); C25D 21/08 (2006.01);
U.S. Cl.
CPC ...
C23G 1/02 (2013.01); C25D 5/48 (2013.01); C25D 21/08 (2013.01);
Abstract
A treatment method is for preventing compound contaminations derived from Sn or an Sn alloy, which have precipitated on members, such as a substrate and a conveyance tool, from accumulating after plating with Sn or the Sn alloy. The method includes washing at least one of the members used in a series of plating treatment steps with an acidic solution immediately after the plating with Sn or the Sn alloy. The acidic solution contains at least one acid or salt thereof having a pH of 5 or lower.