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:
Jun. 12, 2001
Filed:
Dec. 02, 1998
Applicant:
Inventors:
Ian Andrew Abraham, Bishop's Stortford, GB;
Andrew Siu Hing Liu, Epping Green, GB;
Assignee:
Nortel Networks Limited, Montreal, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 1/16 ;
U.S. Cl.
CPC ...
H05K 1/16 ;
Abstract
An electrical circuit arrangement comprising a circuit board and an electrical component attached thereto by a plurality of solder joints. The sizes of the joints are chosen according to a characteristic (for example the frequency) of signals to be conducted through them. The joint sizes are inversely proportional to the frequency of signals which they are arranged to conduct. The expected fatigue life of the arrangement is greater than one in which all joints are of a smaller size, as required for example for high frequency signals, and this reduces the need for component underfill.