According to the number of layers, automotive circuit boards are divided into three major categories: single-panel, double-panel, and multi-layer circuit boards.
It is a single board at first, and 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 a single-sided circuit board. Single-sided panels are usually simple to make and low in cost, but the disadvantage is that they cannot be applied to too complex products.
Double-sided panels are an extension of single-sided panels. When single-layer wiring cannot meet the needs of electronic products, double-sided panels must be used. There are copper-clad traces on both sides, and via holes can be used to conduct the lines between the two layers to form the required network connection.
A multi-layer board refers to a printed board that has more than three conductive pattern layers and insulating materials in between, and is laminated at intervals, and the conductive patterns are interconnected as required. Multilayer circuit board is the product of the development of electronic information technology in the direction of high speed, multi-function, large capacity, small volume, thinner and lighter weight.
Circuit boards are divided into soft boards (FPC), hard boards (PCB), and soft-hard boards (FPCB) according to their characteristics.
How to distinguish between multi-layer circuit board and single-layer circuit board
1. Hold it up to the light, the inner core is opaque, that is, all black is a multilayer board, otherwise it is a single and double board, and a single board has only one layer of wiring, and there is no copper in the hole . The double-sided board has lines on the front and back, and there is copper in the conductive hole.
2. The most fundamental difference is that the number of layers of lines is different:
Single-layer circuit board has only one layer of wiring (copper layer), all holes are non-metallized holes, no electroplating process
The double-layer circuit board has two layers of wiring (copper layer), metallized holes and non-metallized holes, and electroplating process
3. Circuit boards are divided into single-sided circuit boards, double-sided circuit boards and multi-layer circuit boards. Multi-layer circuit boards refer to circuit boards with three or more layers. The manufacturing process of multi-layer circuit boards will add the inner layer lamination process on the basis of single and double sided boards. Distractions can also be analyzed using slices.
What products need to use PCB board
Electronic products that require integrated circuits. In order to save space, make products lighter/more durable/and achieve good performance, these electronic products must eliminate the previous wire connection and switch to printed circuit boards. The PCB meets the space/performance and reliability requirements very well.
Not every appliance needs a circuit board; simple appliances such as electric motors can do without circuits. However, electrical appliances with specific functions generally require circuit boards to realize them, such as televisions, radios, computers, and many others. There is also a PCB board at the bottom of the rice cooker, a speed controller in the fan,
What kind of products use PCB boards
PCB generally refers to hard circuit boards, used in computer motherboards, mouse board graphics cards, office equipment; printers, copiers, remote controllers, various chargers; calculators, digital cameras, radios, TV motherboards, limited TV amplifiers, mobile phones Washing machines, electronic scales, telephones, LED lamps, home appliances, air conditioners, refrigerators, audio, MP3; industrial equipment, GPS, automobiles, instruments, medical instruments, aircraft, military weapons, missiles, satellites, etc. (There is also a kind of APCB. It is also a circuit board, but it is soft. For example, the circuit between the cover and the key of a flip phone uses a soft circuit board).
The key board of the mobile phone motherboard is a hard board; the connecting cable of a slider phone or a flip phone is a soft board. The remote control generally uses a carbon film plate. The mobile phone board is composed of radio frequency circuit, power circuit, audio circuit and logic circuit from top to bottom.
Generally, there is no circuit board in the kettle that is only heated, and the wire bracket is directly connected. The water dispenser has a circuit board. Rice cookers generally 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, etc., and has no practical effect on the operation of the electric fan.
Which products use double-layer boards and which products use multi-layer boards
It mainly depends on whether the performance requirements of the double-layer board can be met, such as anti-interference ability, wiring, EMC requirements and other performance double-layer boards can be realized, so there is no need to use multi-layer boards.
Which is better, multilayer circuit board or single layer circuit board
Multilayer boards are the most widely used circuit board type in daily life. So what are the application advantages of multilayer PCB circuit boards:
Application advantages of multilayer PCB circuit board:
1. High assembly density, small size, and light weight, meeting the needs of light and miniaturized electronic equipment;
2. Due to the high assembly density, the connection between each component (including components) is reduced, the installation is simple, and the reliability is high;
3. Due to the repeatability and consistency of the graphics, wiring and assembly errors are reduced, and equipment maintenance, debugging and inspection time are saved;
4. The number of wiring layers can be increased, thereby increasing the design flexibility;
5. It can form a circuit with a certain impedance, and can form a high-speed transmission circuit;
6. Circuit and magnetic circuit shielding layers can be set, and metal core heat dissipation layers 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 electronic equipment requirements in computer, medical, aviation and other industries, circuit boards are developing in the direction of shrinking volume, reducing weight and increasing density. Due to the limitation of available space, it is impossible to further increase the assembly density of single- and double-sided printed boards. Therefore, it is necessary to consider the use of multi-layer circuit boards with higher layers and higher assembly density. Multilayer circuit boards have been widely used in the production and manufacture of electronic products because of their flexible design, stable and reliable electrical performance and superior economic performance.
