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. 06, 1998
Filed:
May. 20, 1996
Applicant:
Inventors:
Hiroaki Takezawa, Nara, JP;
Toru Shiino, Moriguchi, JP;
Kenichi Nobuta, Ikoma, JP;
Hiroshi Onishi, Hirakata, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
148 23 ; 148 23 ; 148 24 ; 148 25 ;
Abstract
A flux for soft soldering is disclosed. It comprises a chelating agent as an activator for facilitating a connection of a conductor metal to a soft solder by removing an oxide film naturally formed on the surface of the conductor metal, and for securing insulating reliability after soft soldering by forming complexes with copper and tin which are insulating substance, and a solvent capable of dissolving the chelating agent and further preferably evaporating at soldering process.