PCB News - How to judge the quality of Multilayer PCB from color

How to judge the quality of Multilayer PCB from PCB color. Today, Xiaobian will explain to you how the color of PCB affects its performance and how we should judge the quality of multi-layer PCB.

Firstly, as a printed circuit board, PCB mainly provides the interconnection between electronic components. There is no direct relationship between color and performance. Different pigments will not have much impact on electrical performance. However, the performance of PCB board is determined by the materials used (high Q value), wiring design and several layers of boards. In the process of PCB washing, black is the most likely to cause color difference. If there is a slight deviation between the raw materials and manufacturing process used by the PCB Factory, the defective rate of PCB will increase due to color difference. This directly leads to an increase in production costs.

In fact, the raw materials of PCB can be seen everywhere in our daily life, that is, glass fiber and resin. Glass fiber and resin are combined and hardened to become a kind of heat-insulating, insulating and not easy to bend board, which is PCB substrate. Of course, the PCB substrate made of glass fiber and resin alone cannot conduct signals, so the manufacturer will cover a layer of copper on the surface of the PCB substrate, so the PCB substrate can also be called copper-clad substrate.

How to judge the quality of Multilayer PCB from color

Because the circuit wiring of black PCB is difficult to identify, it will increase the difficulty of maintenance and debugging in the R & D and after-sales stage. Generally, black PCB will not be easily used without the brand of RD (R & D) designers with profound skills and powerful maintenance team. It can be said that the adoption of black PCB is a brand's confidence in RD design and later maintenance team. From the side, it is also an embodiment of the manufacturer's confidence in its own strength.

Based on the above reasons, major manufacturers will carefully consider when selecting PCB design for products. Therefore, most of the products with large market shipments in that year adopt red PCB, green PCB or blue PCB. Black PCB can only be seen on medium and high-end or top flagship products, so customers should no longer think that black PCB is better than green PCB.