Author Topic: 4 Layer PCB  (Read 132 times)

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4 Layer PCB
« on: December 19, 2018, 07:21:19 PM »
Solid power and ground planes are good to reduce EMI emissions and can enhance the quality of the signal on the traces. Moreover, connecting components to the planes is much simpler than to route the power and ground trees with traces. The stackup with grounds on outer layers is said to be best from EMC perspective.

Connections between components tend to be clustered locally, and those local connections will have a fairly good chance of being routable on just one layer. If you put all the traces on the inner layers, you will require a via for all the signals to go from the component to the signal layers.

For example, when using SMD components, the connections are on the same layer as the component, so that there is not need for a via or through-hole pad. In space-constrained designs, you are able to put more circuitry on the other side of the board.

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https://www.allpcb.com/pcba.html?code=P9
ALLPCB is a topspeed pcb manufacturer in China, specializing in high quality pcb prototype & production, pcb assembly and smt stencil services online with the shortest lead time and the most favorable price. It offers Turn-Key Circuit Board Assembly Services which is convenient to customers.