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:
Feb. 13, 1996
Filed:
Aug. 31, 1994
Scott D Brandenburg, Kokomo, IN (US);
William S Murphy, Kokomo, IN (US);
Ahmer R Syed, Carmel, IN (US);
David A King, Kokomo, IN (US);
Shing Yeh, Buffalo Grove, IL (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
A terminal pattern is provided for an integrated circuit device, such as a ball grid array package or an integrated circuit flip chip. The terminal pattern is composed of a number of terminals arranged in concentric arrays, each array having a substantially circular shape and being composed of a number of terminals. The terminal pattern is composed of at least two arrays, and more typically three or more arrays. When the integrated circuit device is mounted to its intended substrate, the individual terminals of the terminal pattern each register with and are soldered to a corresponding conductor of a conductor pattern formed on the substrate. A significant advantage is that, due to the terminals of the terminal pattern being arranged in concentric arrays, a smaller maximum width for the terminal pattern is achieved than possible with a conventional rectangular terminal pattern having the same number of terminals. As such, the terminal pattern and the resulting solder joints between the terminal pattern and its corresponding conductor pattern exhibit improved fatigue life as compared to the conventional rectangular terminal pattern.