Patent ID: 6225568
Filing Date: 2001-05-01
Classification: H05K

Abstract:
A circuit board, comprising:a first predetermined shielding configuration, defined in a first plane, comprising a combination of a first set of predetermined void opening patterns with a first predetermined location configuration which comprises locations of said first set of predetermined void opening patterns and a first set of predetermined solid patterns positioned at predetermined locations;a second predetermined shielding configuration, defined in a second plane, comprising a combination of a second set of predetermined void opening patterns with a second predetermined location configuration which comprises locations of said second set of predetermined void opening patterns, and a second set of predetermined solid patterns positioned at predetermined locations; andsignal conducting elements being disposed between said first and second planes and having a virtual ground of differential mode pair of said signal conducting elements defined as the middle of said differential mode pair of said signal conducting elements;wherein said signal conducting elements or said virtual ground is positioned at a predetermined location with respect to said first and second predetermined shielding configurations.