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:
Aug. 27, 2002
Filed:
Aug. 21, 2001
Jayarama N. Shenoy, Fremont, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
The present invention is a technique to minimize crosstalk in multilayer IC packages. According to one or more embodiments of the present invention, signal routing layers are separated by planes for power and ground. Signal trace routing on the routing layers follows either horizontal, vertical or diagonal directions for obtaining high routing densities in the package as is the present design practice. The power and ground planes in one embodiment of the present invention are constructed as a mesh having groups of colinear perforations. The groups are oriented at an arbitrary angle that is chosen to minimize the crossings of groups of signals over mesh openings. It is guaranteed that the number of mesh openings that any given set of three traces encounters is reduced by at least a factor of two. Thus the present invention reduces crosstalk in the package by approximately 50%.