eSuface - Murrietta Circuits

Circuit Board Manufacturing, Assembly, & Design | Murrietta Circuits:

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Landless Vias

You may be surprised to know that HP Test equipment has used landless vias (no annular rings) for several years.

HP’s studies show the landless vias can be more reliable than vias with pads.

Benefits include higher routing density (more traces per layer) which may reduce the total number of layers required in the PCB stackup.

Every layer pair in the stackup is approximately a 20% cost adder.

The trick is to find the fabricator that knows the process for plating via barrels with no annular rings.  

See: The PCB Magazine, June 2016

SIMBEOR® Electromagnetic Signal Integrity Software

SIMBEOR® Electromagnetic Signal Integrity Software:

Signal Integrity Simulator - Free 15 day Trial

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New SMA Phase Stable Test Cables Available!

New SMA Phase Stable Test Cables Available!:

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Signal Integrity in OrCAD PCB SI - YouTube

Signal Integrity in OrCAD PCB SI - YouTube:

FEXT Crosstalk

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Topology and Termination Introduction - YouTube

(10) Topology and Termination Introduction - YouTube:

Terry Fox

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SiliconExpert | Electronic Components Database - Free Trial

SiliconExpert | Electronic Components Database:

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