Considering the signal quality control factors, the general principles of Communication PCB stack design are as follows:
1.The second planes adjacent to the element surface are the ground plane, providing the device shield layer and the top level wiring to provide the reference plane.
2.All signal layers are adjacent to the ground plane as far as possible to ensure the complete return channel.
3.Try to avoid two layers of signal layer directly adjacent to reduce crosstalk.
4.The main power supply as possible as its adjacent, forming a planar capacitor, reducing the power plane impedance.
5.Taking into account the symmetry of laminated structure, which is beneficial to warpage control during plate making.
HYY is professional Consumer PCB Manufacturer for many years in China.