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. 24, 2000
Filed:
Aug. 18, 1997
Robert Thomas Carson, Lantana, FL (US);
Arnold William Hogrefe, Boynton Beach, FL (US);
Frank Juskey, Chandler, AZ (US);
Motorola, Schaumburg, IL (US);
Abstract
An electronic assembly (10) comprises one or more electronic components (18) having solder terminations (20), and a printed circuit substrate (12) having printed circuit traces (14, 16), wherein at least one of the solder terminations of the one or more electronic components (18) and the printed circuit traces (14, 16) of the printed circuit substrate (12) has a secondary finish produced by application of an electrolessly deposited nickel film (26) containing phosphorus which is further plated with gold (28). An indium-tin-lead solder paste (22) is utilized in a soldering process to attached the one or more electronics components (18) to the printed circuit traces (14,16) on the printed circuit board (12), such that the indium-tin-lead solder (22) provides improved solder joint integrity with the secondary finish. The electronic components (18) include semiconductor devices such as ball grid arrays (1000) and flip-chip integrated circuits (1010).