Classification of circuit board
Circuit board according to the number of layers to be divided into single panel, double panel, and multilayer circuit board three major categories.
The first is the single panel. On the most basic PCB, the parts are concentrated on one side and the wires are concentrated on the other. Because the wires appear on only one side, the PCB is called a single-sided circuit board. Single panels are usually simple and inexpensive to make, but have the disadvantage that they cannot be applied to too complex products.
Double panel is the extension of a single panel, when the single layer wiring can not meet the needs of electronic products, it is necessary to use double panel. Both sides are covered with copper wires, and the wires between the two layers can be guided through holes to form the required network connection.
Multilayer board refers to the printed board which has more than three conductive pattern layers and insulating materials in between, and the conductive pattern in between is interconnected as required. Multilayer circuit board is the electronic information technology to high speed, multi-function, large capacity, small volume, thin, lightweight direction of the development of the product.
According to the characteristics of the circuit board is divided into soft board (FPC), hard board (PCB), soft and hard board (FPCB).
How to distinguish multilayer circuit board from single-layer circuit board
1, pick up the light, the inner core is opaque, that is, all are black, is a multi-layer board, on the contrary is single double panel, and single panel, only a layer of line, hole inside no copper. Double panel is the front and back of the line, guide through the hole in the copper.
2, the most fundamental difference is the number of lines:
There is only one layer of circuit board (copper layer), all the holes are non-metallic holes, no electroplating process
There are two layers of circuit board (copper layer), metallized hole and nonmetalized hole, and electroplating process
3, circuit board is divided into single-sided circuit board, double-sided circuit board and multi-layer circuit board, multi-layer circuit board refers to three layers and more than the number of layers of circuit board. The manufacturing process of the multi-layer circuit board will be based on the single and double panel plus the inner laminating process. It can also be analyzed using slice distraction.
What products need to use PCB board
Electronic PRODUCTS that require integrated wiring, in order to save space, make the product lighter/more durable/and achieve good performance, have to switch from wire connections to printed circuit boards. PCB meets the space/performance and reliability requirements very well.
Not every appliance needs a circuit board. Simple appliances do not need a circuit such as a motor. But there are certain kinds of things that you need circuit boards for: televisions, radios, computers, and on and on. The cooker also has a PCB on the bottom, the governor in the fan,
What kind of products use PCB board
PCB generally refers to the hard circuit board, used in such as computer host board, mouse board, graphics card, office equipment, printer, copier, remote controller, all kinds of chargers, calculator, digital camera, radio, television motherboard, limited TV amplifier, mobile phone, washing machine, electronic scale, telephone, LED lamps, home appliances: Air conditioning, refrigerator, stereo, MP3; Industrial equipment, GPS, automotive, instrumentation, medical instruments, aircraft, military weapons, missiles, satellites and so on. (Another is APCB also does. Is the circuit board, just soft, like the clamshell phone connection cover and key in the middle of the circuit with the soft circuit board).
Mobile phone motherboard, keyboard, is a hard board; The wiring of a slider or flip phone is a soft board. The remote control is generally used carbon film board. The mobile phone board from top to bottom are radio frequency circuit, power circuit, audio circuit, logic circuit
Generally just heating hot kettle without circuit board, wire bracket directly connected. The water fountain has a circuit board. Rice cookers usually have circuit boards. Induction cooker has circuit board. There are circuit boards in the electric fan, but generally play the functions of speed regulation, timing, display and so on, and the electric fan operation has no practical effect.
Which products are used in double-layer board, which products are used in multi-layer board
Mainly look at the performance requirements of double layer board can meet, such as anti-interference ability, wiring, EMC requirements and other performance double layer board can be realized, do not need to use multi-layer board.
Multilayer circuit board and monolayer circuit board which good
Multilayer board is the most used circuit board type in daily life. So what are the application advantages of multi-layer PCB circuit board:
Application advantages of multi-layer PCB circuit board:
1, high assembly density, small volume, light weight, meet the light and miniaturization requirements of 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, the wiring and assembly errors are reduced, and the maintenance, debugging and inspection time of the equipment are saved;
4, can increase the number of wiring layers, thus increasing the design flexibility;
5, can constitute a circuit with a certain impedance, can form a high-speed transmission circuit;
6, can set the circuit, magnetic circuit shielding layer, but also can set the metal core heat dissipation layer to meet the shielding, heat dissipation and other special function needs.
With the continuous development of electronic technology and computer, medical, aviation and other industries to the continuous improvement of electronic equipment requirements, circuit board forward volume reduction, quality reduction, density increase direction development. Due to the limited space available for single and double sided printed boards, it is not possible to achieve further increase in assembly density, so it is necessary to consider using more layers and higher assembly density of multilayer circuit boards. Multilayer circuit board with its flexible design, stable and reliable electrical performance and superior economic performance, has been widely used in the production and manufacturing of electronic products.