Why are six-layer PCBs widely used?
Why are six-layer PCBs widely used?
A six-layer pcb consists of six layers of conductive material. It consists of a four-layer PCB with two additional signal layers between the two planes. A typical six-layer printed circuit board consists of two inner layers, two outer layers, and two inner layers, one for power and one for ground. Such a design can improve electromagnetic interference and provide better routing options for low-speed and high-speed signals. A two-layer surface layer facilitates the transmission of low-speed signals, while two inner layers facilitate high-speed signals.
Properly stacking a 6-layer PCB can make its performance more perfect, it can effectively suppress EMI due to the use of different kinds of RF equipment, and it contains multiple spaced components. Any errors in the design will affect the perfect performance of the PCB. So how should we design to give full play to the perfect performance of PCB?
First before designing, we need to analyze and address the number of ground, power and signal planes that the pcb may require. Bonding layers are an important part of any laminate because they provide better shielding for the laminate and they reduce the need for external shielding cans.
If you want to plan a dense circuit board with a small wiring footprint, you can install four signal layers, a ground layer, and a power layer. In higher-density circuit boards, a mixture of wireless signals and analog signals is used. The signal layer/ground/power layer/ground/signal layer/ground layer is superimposed to separate the inner and outer signal layers, and there are both internal and external signals. layer. This layered design helps suppress EMI mixing within the internal signal layers. Stacked designs are also ideal for RF equipment because the AC power and ground planes provide excellent decoupling.
If you want to build a printed circuit board with many sensitive lines, it is best to choose a stack like this: Signal/Power/2 Signal/Ground/Signal. This can protect sensitive traces well and is more suitable for high-frequency analog signals. or circuits for high-speed digital signals. These signals are separated from the outer, lower speed signals. This shielding is done on the inner layer, which also allows signal routing at different frequencies or switching speeds.
The stack of ground/signal layer/power/ground/signal layer/ground can be perfectly deployed on circuit boards near strong radiation sources. This stacking can effectively suppress electromagnetic interference and is also suitable for circuit boards used in noisy environments.
Since their six-layer pcb design has become a common feature of some advanced electronic circuits and popular among electronics manufacturers, what are its specific advantages?
Due to their multi-layer design, they are relatively smaller than other circuit boards, which is especially beneficial for micro devices. The design of a 6-layer PCB stack requires a lot of planning, which can reduce errors in details and ensure high-quality construction. Currently, different testing and inspection technologies are generally used to ensure the suitability of circuit boards. Compact PCBs are achieved by using lightweight components, which helps reduce the overall weight of the PCB. Unlike single- or double-layer PCBs, six-layer PCBs can interconnect components without multiple connectors.
A 6-layer circuit board consists of multiple insulating layers made of protective materials bonded with different prepregs. This helps improve the durability of these PCBs. The 6-layer printed circuit board has excellent electrical performance and compact design, which can effectively ensure high speed and high capacity.
