What Is A Multilayer Circuit Board?

Nov. 18, 2019

The increased concentration of integrated circuit packages leads to a high concentration of interconnect lines, which necessitates the use of multiple substrates. Unpredictable design issues such as noise, stray capacitance, crosstalk, etc. occur in the layout of printed circuits. Therefore, printed circuit board design must focus on minimizing signal line length and avoiding parallel paths. Obviously, in a single panel, even in a double panel, these requirements cannot be satisfactorily answered due to the limited number of crossovers that can be achieved. In the case of a large number of interconnections and cross-over requirements, in order to achieve a satisfactory performance, the board must be expanded to more than two layers, resulting in a multilayer board. The original intent of fabricating multilayer boards is therefore to provide more freedom in selecting suitable routing paths for complex and/or noise-sensitive electronic circuits.


Multilayer Flexible PCB


Multilayer Flexible PCB


Multilayer boards are as the name suggests. Two or more layers of boards can be called multiple layers, such as four layers, six layers, eight layers, and so on. Of course, some designs are three- or five-layer lines, also called multi-layer PCB boards. The conductive trace diagram is larger than the two-layer board. The layer is separated from the layer by an insulating substrate. After each layer is printed, the layers are overlapped by pressing. After drilling, the vias are used to achieve conduction between each layer of the line. So what are the advantages of multi-layer PCB boards? Multilayer Flexible PCB Manufacturer will tell you next.


The advantage of multi-layer PCB boards is that the lines can be distributed in multiple layers of wiring, allowing for the design of more sophisticated products. Or smaller products can be achieved with multi-layer boards. Such as: mobile phone circuit boards, micro projectors, voice recorders and other volumetric products. Additional layers allow for greater design flexibility, better control of differential impedance and single-ended impedance, and better output at some signal frequencies.


Multi-layer circuit boards are the inevitable result of the development of electronic technology to high speed, multi-function, large capacity and small volume. With the continuous development of electronic technology, especially the extensive and in-depth application of large-scale and ultra-large-scale integrated circuits, multi-layer printed circuits are rapidly moving toward high-density, high-precision, high-level digitalization, and there are fine lines and small apertures running through. Blind hole buried hole high plate thickness ratio and other technologies to meet the needs of the market. Due to the high-speed circuit needs of the computer and aerospace industries. Further increasing the packing density, coupled with the reduction of the size of the discrete components and the rapid development of microelectronics, the electronic device is shrinking in size and the direction of quality reduction; single and double-sided printed boards are impossible due to the limited space available. A further improvement in assembly density is achieved. Therefore, it is necessary to consider using more printed circuits than double-layer layers. This creates conditions for the emergence of multilayer boards.


The above content is the analysis and summary of the 2 Layers Flexible PCB Supplier. Of course, the multilayer circuit board may not be mentioned in the article. Welcome customers to supplement it. We also welcome customers from all over the country to visit the company. We can provide you with a high quality double-sided PCB wholesale service and a Rigid Flex PCB Board Supply.