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, 2016
Filed:
Dec. 16, 2011
Natsuki Kubo, Osaka, JP;
Eiji Iwamura, Kanagawa, JP;
Natsuki Kubo, Osaka, JP;
Eiji Iwamura, Kanagawa, JP;
Arakawa Chemical Industries, Ltd., Osaka, JP;
Abstract
A principal object of the present invention is to provide a flux which can be used to produce a lead-free solder paste which is excellent in viscosity stability and exhibits excellent wettability at the time of soldering even in atmospheric air. The flux is a lead-free solder flux having a bromine atom concentration of 400 to 20000 ppm based on 0.1 g of the flux and comprising 0.01 to 0.7% by weight of an amine compound (a) represented by the general formula (1): HN—(CH)—X—(CH)—NH(wherein n represents an integer of 1 to 6 and X represents —NH—CHCH—NH— or a piperazine residue).