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Single Layer PCB Printed Circuit Board

About 8% of PCB boards we are asked to produce are comprised of an odd number of layers. But unless you have a specific requirement, it is usually best to design a multilayer board with an even number of layers. Reducing an even layered board by one layer may seem like a cost-saving move, but from a PCB perspective it is not. It may actually increase the cost as well as lead-time and leave you with a warped PCB board which may not meet your expectations. Let's look at the issues in detail.


An odd number of layers means one layer is blank, so no film is needed for that layer. This represents small savings in CAM. If cost savings are the main reason you are entertaining an odd layer design, you may realize more tangible results by reviewing our article on design techniques and best practices.


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We are experienced circuit board design engineers and excellent managers and have top-rank equipment and strict quality control department. With its top production technology and effective management and high-quality, efficient, honest services, we win the appreciation trust of our customers. In the production preparation and the choice of materials we use internationally accepted ISO material sampling system. During production process, the products of the same intrinsic quality is the most important. With increasingly mature after-sales service network we can provide the fastest, most comprehensive and most convenient service.


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Multilayer PCBs have one or more conductor pattern inside the board, to increase the area available for the wiring. This is achieved by gluing (laminating) several double-sided circuit boards together with insulating layers in between. The number of layers is referred to as the number of separate conductor patterns - usually even and including the two outer layers. Most boards have between 4 and 8 layers, but PCBs with almost 100 layers can be made.


Since the layers in a PCB are laminated together, it is often difficult to tell how many there are, but if you inspect the side of the board closely you might be able to count them. Large super computers often contain boards with plenty of layers, but since it is becoming more efficient to replace these computers with clusters of ordinary PCs, high layer counts are now less common. The vias described in Double-sided PCBs always penetrate the whole board. When there are multiple layers of conductor patterns and you only want to connect some of them, vias waste space that could be used to route other wires. 'Buried' and 'blind' vias avoid this problem because they only penetrate as many layers as is necessary.


Blind vias connect one or more of the inner layers with one of the surface layers, without penetrating the whole board. Buried vias only connect inner layers so you cannot see them by looking at the surface of the PCB.


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In multi-layer PCBs whole layers are almost always dedicated to Ground and Power. So we classify the layers as Signal, Power or Ground planes. Sometimes there is more than one of both Power and Ground planes, especially if the different components on the PCB require different supply voltages.


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