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:
Jan. 24, 2012
Filed:
Oct. 27, 2008
Jeffrey A. Underwood, Sunrise, FL (US);
Thomas J. Swirbel, Davie, FL (US);
Michael J. Watkins, Sunrise, FL (US);
Jeffrey A. Underwood, Sunrise, FL (US);
Thomas J. Swirbel, Davie, FL (US);
Michael J. Watkins, Sunrise, FL (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
Method and apparatus for spatially optimizing the arrangement of surface mount pads on a ball grid array package. An array containing T surface mount pads with a diameter less than or equal to 0.4 millimeter is arranged in an array of rows and columns less than or equal to 0.5 millimeters center-to-center. The array of pads is subdivided into N groups of pads respectively numbered G(for X from 1 to N), each group containing Ppads (for X from 1 to N). Each pad in each group is located so as to maximize the number of empty spaces Sthat are adjacent to each pad, where S=(G−1). The number of fanout possibilities for each group (P*S) is calculated, and then the total number of fanout possibilities, FP, is calculated using the function Σ(P*S). The resulting spatially optimized pattern has a quality score, FP/T, that is equal to or greater than 2.