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Multilayer circuit board factory: How to distinguish the number of layers of multilayer circuit board

Multilayer circuit board factory: How to distinguish the number of layers of multilayer circuit board

  • Categories:Industry News
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  • Time of issue:2020-07-25 12:07
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Multilayer circuit board factory: How to distinguish the number of layers of multilayer circuit board

Information

The substrate of the multilayer circuit board factory is made of insulating and heat-insulating materials that are not easy to bend. The small circuit material that can be seen on the surface is copper foil. The copper foil was originally covered on the entire circuit board, but part of it was etched away during the manufacturing process, and the remaining part became a net-like small circuit. NS. Multilayer circuit board factories call these lines as wires or wiring, and they are used to provide circuit connections for parts on the circuit board.

 

Multilayer boards are now used on motherboards and graphics cards, greatly increasing the area that can be wired. The multi-layer circuit board factory uses more single or double-sided wiring boards, and puts an insulating layer between each layer and presses them together. The number of layers of a multi-layer circuit board means that there are several independent wiring layers. Usually, the number of layers is an even number and contains the two outermost layers. The common multi-layer circuit board generally has a structure of 4 to 8 layers. The number of layers designed by many multilayer circuit board factories can be seen by looking at the cut surface of the multilayer circuit board. But in fact, this method is not convenient.

 

The circuit connection of the multilayer circuit board factory is through buried via and blind via technology. Most motherboards and display cards use 4-layer multilayer circuit boards, and some use 6, 8 or even 10-layer multilayer circuit boards. If you want to see how many layers there are in the PCB, the multi-layer circuit board factory introduced that you can identify it by observing the via holes, because the 4-layer boards used on the motherboard and the graphics card are the first and fourth layers of wiring, and the other layers Another purpose (ground wire and power supply). Therefore, like double-layer boards, the pilot holes of the multilayer circuit board factory will penetrate through the multilayer circuit boards. If some guide holes appear on the front side of the PCB board but cannot be found on the back side, then it must be a 6/8-layer board. If the same via holes can be found on both sides of the multilayer circuit board, it will naturally be a 4-layer board.

 

The multi-layer circuit board factory will teach you a little trick: point the motherboard or display card to the light source. If the position of the guide hole can transmit light, it means that it is a 6/8-layer board; otherwise, it is a 4-layer board.

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The evaluation system of the circuit board factory should follow the following principles

The evaluation system of the circuit board factory should follow the following principles

Establishing a good cooperative relationship with circuit board factories is conducive to cost reduction, response time reduction and the creation of new market value, etc. The core issue is how to choose the ideal circuit board factory. There are many factors involved in the evaluation of circuit board factories, and the evaluation index systems are diverse, both qualitative and quantitative, and the index weights are also different. Therefore, it is necessary to establish a universal and expandable evaluation index system for circuit board factories. , And the indicator system should follow the following principles:
The use of soft and hard circuit boards?

The use of soft and hard circuit boards?

In our daily life, circuit boards are mostly single-sided, double-sided, or multi-layer boards, rigid boards, metal-based circuit boards, aluminum, copper substrates, thermally conductive fiberboards, etc., do you know what a flexible and rigid circuit board is? Rigid-flex circuit board: refers to a special circuit board made by pressing a rigid circuit board (PCB) and a flexible circuit board (FPC). The main board materials used are rigid board FR4 and flexible board polyimide (PI). Rigid and flexible circuit boards combine the rigid characteristics of rigid circuit boards and the advantages of flexible circuit
Soft and hard circuit board production process

Soft and hard circuit board production process

The flexible and hard circuit board is the flexible circuit board and the rigid circuit board. After pressing and other processes, they are combined according to the relevant process requirements to form a circuit board with FPC characteristics and PCB characteristics. In the past, two hard boards were connected by using soft boards and connectors to connect each other. In order to improve the reliability of the connection between the rigid board and the flexible board, the flexible board is directly fabricated between two rigid boards in the printed circuit board (PCB) factory, which can avoid the subsequent connection process, whether it is a rigid board manufacturer or FPC manufacturers are now able to supply rigid-flex boards. Under the demand for light and thin end products, the

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