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. 04, 2000
Filed:
Sep. 23, 1998
Applicant:
Inventors:
Pietro Luigi Cavallotti, Milan, IT;
Vittorio Sirtori, Milan, IT;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
106-122 ; 106-125 ; 106-129 ;
Abstract
A method and a bath for autocatalytic chemical deposition of a Sn Zn alloy on a catalytic surface. The method is particularly useful in the manufacture of electronic components, when the deposition of a thin layer of Sn Zn alloy is needed before the deposition of the Sn alloy (particularly Pb free) to improve the solderability characteristics of the Cu surface. The Cu surface must be made catalytic before immersion in the autocatalytic bath, e.g. by depositing a thin film of metallic Sn.