Printed circuit board

Details Printed circuit board Printed circuit board

2007-12-15

2011-11-15

Estrada, Angel R (Department: 2835)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C174S261000, C361S777000, C361S778000, C333S005000, C333S012000, C333S033000

Reexamination Certificate

active

08058557

ABSTRACT:
An exemplary PCB includes a first reference layer, a first signal layer, a second signal layer, and a third signal layer in that order, a first differential pair is arranged in the first signal layer in edge-coupled structure and references the first reference layer, a distance between the first signal layer and the second signal layer is greater than a distance between the first reference layer and the first signal layer, a second differential pair is arranged in the second signal layer and the third signal layer in broad-coupled structure. The PCB has a high density layout of transmission lines.

REFERENCES:
patent: 7232959 (2007-06-01), Hsu
patent: 2005/0098346 (2005-05-01), Fan et al.
patent: 2006/0244124 (2006-11-01), Ohlsson

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