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:
Jan. 01, 2002
Filed:
Jun. 01, 2000
Applicant:
Inventors:
Kenzo Hanawa, Chiba, JP;
Kiyotaka Yanagi, Saitama, JP;
Assignee:
Mitsui Mining and Smelting Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 3/5365 ;
U.S. Cl.
CPC ...
B23K 3/5365 ;
Abstract
A lead-free solder in which oxidation of the powder surface with time is prevented and a process for preparing the same. The lead-free solder powder has tin-zinc or tin-zinc-bismuth as a major composition and forms an organometallic compound of malonic acid and a metal of the solder alloy powder on the surface of solder alloy powder containing no lead.