Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2007-10-30
2009-11-10
Norris, Jeremy C (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C029S852000
Reexamination Certificate
active
07615709
ABSTRACT:
A circuit board comprises signaling through-holes that pass through a plurality of layers, including signal trace and digital ground plane layers, and power reference plane layers. Clearances are set to achieve a desired impedance characteristic for the through-holes. At a power reference plane layer, the clearance is defined around multiple neighboring through-holes.
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Force10 Networks, Inc.
Norris Jeremy C
Schuler Robert
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