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:
Apr. 19, 2022
Filed:
Jan. 12, 2018
Applicant:
Senju Metal Industry Co., Ltd., Tokyo, JP;
Inventors:
Tomohisa Kawanago, Tochigi, JP;
Miyuki Hiraoka, Tochigi, JP;
Takahiro Nishizaki, Tochigi, JP;
Naokatsu Kojima, Tochigi, JP;
Hiroyoshi Kawasaki, Tokyo, JP;
Assignee:
Senju Metal Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K 35/362 (2006.01); B23K 35/36 (2006.01); H05K 3/34 (2006.01); B23K 101/36 (2006.01); B23K 101/42 (2006.01);
U.S. Cl.
CPC ...
B23K 35/362 (2013.01); B23K 35/3612 (2013.01); B23K 35/3618 (2013.01); H05K 3/3489 (2013.01); B23K 2101/36 (2018.08); B23K 2101/42 (2018.08);
Abstract
Provided is a flux which is rosin-free and contains 50% by mass or more and 90% by mass or less of 2,4-diethyl-1,5-pentanediol, more than 0% by mass and less than 50% by mass of a solvent, 1% by mass or more and 15% by mass or less of an organic acid, wherein the total amount of the 2,4-diethyl-1,5-pentanediol and the solvent is 83% by mass or more and 99% by mass or less. This flux does not require washing with an organic detergent when transferred to solder balls is provided.