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:
Jul. 23, 1996
Filed:
Jun. 27, 1994
Applicant:
Inventors:
Assignee:
AT&T Corp., Murray Hill, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
420557 ; 420558 ; 420559 ; 420560 ; 420561 ; 420562 ;
Abstract
Pb-free solder alloys based on the Sn-In-Zn system (exemplarily 86:5:9 weight %) are disclosed. Compositions can have a melting temperature in the range 183.degree. C..+-.10.degree. C. and thus can be readily substituted for conventional 40 Pb-60 Sn solder. The novel compositions also can possess superior mechanical properties, compared to the 40/60 Pb-Sn composition, and readily wets copper. Bi and/or Sb may be added to the Sn-In-Zn base to reduce the tendency for the formation of lower temperature phases.