How to distinguish multilayer PCB from single-layer PCB

According to the number of layers, automobile circuit boards can be divided into single panel, double panel, and multi-layer circuit boards.

First is the single panel. On the most basic PCB, parts are concentrated on one side and wires are concentrated on the other side. Because wires only appear on one side, this PCB is calLED single-sided circuit board. Single panel is usually SIMple to make and low in cost, but its disadvantage is that it cannot be applied to too complex products.

Double panel is an extension of single panel. When single-layer wiring cannot meet the needs of electronIC products, double-sided panel will be used. Both sides are copper coated and wired, and the line between the two layers can be conducted through the via to form the required network connection.

Multilayer board refers to a printed board with more than three conductive graphic layers and insulating materials between them laminated at intervals, and the conductive graphics between them are interconnected as required. multilayer circuit board (MLPCB) is the product of the development of electronic information technology in the direction of high speed, multi-function, large capacity, SMAll volume, thin and lightweight.

PCB can be divided into soft board (FPC), hard board (PCB) and soft hard combination board (FPCB) according to characteristics.

How to distinguish multi-layer circuit board from single-layer circuit board

1. Take it up and shine at the light. The inner core is light tight, that is, it is all a black piece, that is, a multilayer board. On the contrary, it is a single double-sided board. The single panel has only one layer of wiring, and there is no copper in the hole. There are lines on both sides of the double-sided board, and copper is in the guide hole.

2. The most fundamental difference is that the number of lines is different:

Single layer circuit board has only one layer of circuit (copper layer), all holes are non-metallic, and there is no electroplating process

The double-layer circuit board has two layers of lines (copper layer), metallized holes and nonmetallic holes, and electroplating process

3. The circuit board is divided into single-sided circuit board, double-sided circuit board and multi-layer circuit board. Multilayer circuit board refers to the circuit board with three or more layers. In the manufacturing process of multilayer circuit boards, the inner layer pressing process is added to the single and double sided boards. Distraction can also be analyzed by slicing.

What products need PCB board

For electronic products that need integrated circuits, in order to save space, make the products lighter/more durable/and achieve good performance, they must replace the previous wire connections and switch to printed circuit boards. PCB meets the requirements of space/performance and reliability.

Not every electrical appliance needs a circuit board. Simple electrical appliances do not need circuits such as motors. However, electrical appliances with specific functions generally need circuit boards to realize, such as TV, radio, computer, etc. There is also a PCB at the bottom of the rice cooker and a speed regulator in the fan,

What kinds of products use PCB boards

PCBs generally refer to hard circuit boards, which are used in computer mainboards, mouse boards, video cards, office equipment, printers, copiers, remote controllers, various chargers, calculators, digital CAMeras, radios, TV mainboards, limited television amplifiers, mobile phones, washing machines, electronic scales, telephones, LED lamps, home appliances: air conditioners, refrigerators, stereos, MP3; Industrial equipment, GPS, automobiles, instruments, medical instruments, aircraft, military weapons, missiles, satellites, etc. (The other is also made by APCB. It is also a circuit board, but it is soft. For example, the flip phone uses a soft circuit board to connect the circuit between the cover and the key.).

Mobile phone motherboard and key board are hard boards; The connection cable of a slide phone or a flip phone is a soft board. The remote controller is usually made of carbon film. The mobile phone board is composed of RF circuit, power circuit, audio circuit and logic circuit from top to bottom

Generally, the heated kettle has no circuit board and the wire bracket is directly connected. The water dispenser has a circuit board. Rice cookers usually have circuit boards. The induction cooker has a circuit board. There is a circuit board in the electric fan, but it is generally used for speed regulation, timing, display and other functions, and has no practical effect on the operation of the electric fan.

Which products use double-layer boards and which products use multilayer boards

It mainly depends on whether the performance requirements of the double-layer board can be met, such as anti-interference capability, cabling, EMC requirements and other performance requirements of the double-layer board can be achieved, so it does not need to use a multilayer board.

Which is better, multi-layer circuit board or single-layer circuit board

Multilayer boards are the most widely used type of circuit boards in daily life. What are the application advantages of multilayer PCB:

Application advantages of multilayer PCB:

1. High assembly density, small size, light weight, meet the requirements of light and small electronic equipment;

2. Due to the high assembly density, the connection between components (including components) is reduced, the installation is simple, and the reliability is high;

3. Because of the repeatability and consistency of the graphics, the errors in wiring and assembly are reduced, and the time for equipment maintenance, debugging and inspection is saved;

4. The number of cabling layers can be increased, thus increasing the design flexibility;

5. It can form a circuit with a certain impedance and a high-speed transmission circuit;

6. The shielding layer of circuit and magnetic circuit can be set, and the heat dissipation layer of metal core can also be set to meet the needs of special functions such as shielding and heat dissipation.

With the continuous development of electronic technology and the continuous improvement of the requirements of computer, medical, aviation and other industries for electronic equipment, circuit boards are developing in the direction of shrinking size, reducing mass and increasing density. Due to the limitation of available space, it is impossible to further improve the assembly density of single and double sided printed boards. Therefore, it is necessary to consider using multilayer printed boards with higher layers and assembly density. Multilayer circuit board has been widely used in the production of electronic products due to its flexible design, stable and reliable electrical performance and superior economic performance.