Discussion on Relevant Knowledge of PCB Circuit Board Manufacturers in Shenzhen

1. What is a PCB circuit board

The structure of PCB circuit boards and printed circuit boards can generally be divided into two parts, namely the substrate part (usually made of engineering plastics with good insulation and resistance to bending) and the circuit layer part. The conductive medium used in the circuit layer part is copper foil, also known as copper sheet, which covers the two outer surfaces of the entire base layer. This layer is the core part of the entire PCB. Designers use various design software to design the circuit, and then use specialized machines to carve the copper foil layer according to the design drawings. Unneeded parts are carved out to form a complete circuit. At the same time, various components (chips, resistors, capacitors, inductors, plugs, fuses, etc.) are soldered or pasted onto the PCB to form a complete circuit together with the copper foil layer.

Shenzhen PCB circuit board manufacturer

2. What is the layering of PCB circuit boards

Generally speaking, a PCB circuit board has two layers, located on the upper and lower surfaces of the substrate. The circuits on the upper and lower layers are different due to circuit design needs and safety considerations, such as the power supply and grounding circuits, which are usually separated from the circuit layer on separate layers. In some special cases, for some complex circuits, it may not be possible to arrange all the circuits in one layer or control the circuits in one layer (such as certain components having very fine impedance requirements), which requires the use of multi-layer PCBs. Multilayer PCBs actually stack single-layer PCBs together, so that different circuits can be designed on different circuit layers to meet the needs of complex circuits. Generally, the layers of PCBs are divided into 2 layers, 4 layers, 6 layers, 8 layers, 10 layers, etc.

3. How to distinguish the layering of PCB circuit boards

It is relatively easy to distinguish whether a PCB circuit board is multi-layer, simply facing the light and observing whether the parts without copper covering on the upper and lower surfaces are semi transparent. Because if there are other circuit layers in the middle, the transparency will naturally be very low. It is possible for some experienced developers to roughly distinguish the layers of a PCB with the naked eye, but it is difficult to accurately determine the number of layers.

4. Color difference of PCB circuit board

There is no unified standard for the color of PCB circuit boards, so there is no saying that other colors of PCBs are necessarily better than green ones. However, in PCB design, green boards are the most commonly used because green surfaces do not look dazzling. Some manufacturers, in order to highlight their own designs, often change the color of PCBs on some high-quality products to achieve a unique visual effect, Perhaps this is the source of the feeling that "other colors are better than green" for everyone.

5. How to choose and purchase PCB circuit boards

Firstly, it is based on the industry needs of the customer to specify the number of layers of the PCB. For example, for a customer who is making motherboard graphics cards, it is only a small part of the selection process, as all boards must undergo reliability testing before mass production. Even if 4-layer or even 2-layer boards are used, the product performance requirements can be met. Moreover, due to the number of layers of PCB boards, Most merchants also do not understand, so the significance of this aspect in actual purchasing is not significant and can be relaxed.

This article title: Discussion on Relevant Knowledge of PCB Circuit Board Manufacturers in Shenzhen

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