RCY ELECTRONIC : the Most suitable Layer Stack-up for 6-layer High-speed PCB boards

As is well-known, Multi-layer PCBs such as 6-layer circuit boards are widely used in the fields of

medical devices, industrial control, and embedded systems. It requires High frequency and High-speed PCB boards to meet the needs in these fields

However, we will always encounter some problems when designing the pcb Layer Stack-up for Multi-layer PCBs, like 6 Layers PCB of High-speed.

Today, let’s talk about the Layer Stack-up that used in 6 Layers PCBs

Common layer Stack-up

First of all, we will introduce the common layer Stack-up that PCB circuit board factory uses mostly

However, this structure i s used for ordinary PCB boards without high-speed signals.

 

Structure 1:

Top-GND-Siganl_1-Siganl_2-VCC-Bottom

the GND layer and power layer effectively shield the Top layer from the Siganl_1, Bottom layer to the Siganl_2 interference.

In addition, more than 20 mils between Siganl_1 and Siganl_2 reduces crosstalk between the two signal layers.

 

Structure 2:

Top-Siganl_1-GND-VCC-Siganl_2-Bottom

In this PCB layer Stack-up ,the GND layer and the power layer are fully coupled

The signal layer between the Top layer and the Siganl_1/Siganl_2 to Bottom layer is relatively prone to crosstalk,

And also, the signal isolation effect is not good.

 

Structure 3:

Top-GND-Siganl_1-VCC-GND-Bottom

In this PCB layer Stack-up, the GND layer and the power layer effectively shield the cross-talk of the signal between the Top layer, the Siganl_1, and the Bottom layer

adding a  GND layer and reducing a signal layer

However,this PCB layer Stack-up is obviously optimal in terms of shielding cross-talk,

and the disadvantage is that a layer of signal is missing

 

Mike



Shenzhen Renchuangyi Electronics Co., Ltd
Tel: 0755-27314226
Address:
Building 4, JinFeng Industry Zone, Heping Village, Fuyong Town, Bao’an District, Shenzhen, Guangdong Province, PRC.:
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