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How to design the signal of multilayer PCB?

We have introduced many articles about how to design a multilayer PCB.
If you have read some of them, you must know multilayer PCB key design where it’s hole design.
So this post will going to discuss how to design a multilayer PCB.
Bias between routing layers induce interconnection discontinuities.
To design a good hole of multilayer PCB, you have to better consider the signal reflection.
So this post will focus on this topic.

The feature of multilayer PCB signal

First of all we should know signal of multilayer PCB is advanced design content.
If you are a multilayer PCB design beginners, please ignore this part.
Signal reflection on the track is enhanced because of these discontinuities.

The theory of multilayer PCB signal design

Here David have listed some factors related to the theory of multilayer PCB signal design.
If you have any other questions about How to design the signal of multilayer PCB, please mail to our PCB experts.
A visa is a noise source as the signal frequency increases.
The reflection fraction changes with the via geometry properties, especially via height.
Via heights from 250 /spl mu/m to 1500 /spl mu/m are studied under high frequency by simulation.
The reflection loss caused by a via increases with via height nonlinearly.
go to 4mcpcb.com to know How to design the signal of multilayer PCB.