Via stub termination structures and methods for making same

Details Via stub termination structures and methods for making same Via stub termination structures and methods for making same

2005-10-20

2008-11-25

Reichard, Dean A. (Department: 2841)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S763000, C361S766000, C174S260000, C174S261000

Reexamination Certificate

active

07457132

ABSTRACT:
Vias are used in multilayer printed circuit boards to route electrical interconnects between layers. Some via constructions embodiments result in the formation of a via-stub section. Via stub sections can distort signals passing through the interconnect and decrease the usable bandwidth of the interconnect. To minimize distortion and increase bandwidth, one or more terminating elements can be attached to the unterminated end of the via-stub section. The impedance terminating element may include, by way of non-limiting example, one or more resistors, capacitors, and/or inductors between the via stub and a ground layer. The impedance terminating element may be formed internally to the PCB or mounted to the PCB surface.

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