China Topscom Delivered Article About Summary of the classification and application of pcb circuit boards involved in the latest market circulation products in 2020 On China Electronic Components Magzine CECM.
 
Keywords: china pcb board, pcba boards assembly,latest pcb information.in 2020.
 
Differences between circuit boards, integrated circuits, single-chip computers, CPU and chips:
 
Circuit board: also known as printed circuit board, is an important electronic component, is the support of electronic components, is the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called a "printed" circuit board. The circuit board is one of the important components in the electronic industry. Almost every kind of electronic equipment, from electronic watches and calculators to computers, communication electronic equipment, military weapon systems, as long as there are integrated circuits and other electronic components, in order to make the electrical interconnection between the components, printed boards are used. The printed circuit board (PCB) is composed of an insulated base board, a connecting wire and a welding pad for assembling and welding electronic components, which has the dual functions of conductive circuit and insulated base board. It can replace the complex wiring and realize the electrical connection between the components in the circuit, which not only simplifies the assembly and welding of electronic products, reduces the wiring workload in the traditional way, and greatly reduces the labor intensity of workers, but also reduces the volume of the whole machine, reduces the product cost, and improves the quality and reliability of electronic equipment. the article is posted by Mr.Xiao Wei, Director of Topscom Pcb Layout Design Department,China Topscom provide professional Pcb board layout design, pcb assembly and manufacturing,full turnkey systems integration box build assembly,contract electronic manufacturing service.
 
Integrated circuit: IC (Inter grated Circuit), integrates transistors, resistors, capacitors, diodes and other electronic components into the chip (chip), forming components. Is to achieve a certain function, a variety of circuit units can be put together the circuit, called IC in English.
 
Single-chip microcomputer: is a smallest system, can be programmed to achieve a variety of required functions, English called MCU, that is, micro-controller, such as the use of single-chip microcomputer, plus a variety of peripheral circuits, can make a robot.
 
CPU:, called central processing unit in Chinese, is the heart of an electronic product, such as the computer you use now. Without CPU, you would be dead.
 
Chip: short for integrated circuit.
 
What products need to use PCB board.
Electronic products that require integrated circuits, in order to save space, make the products lighter / more durable / and achieve good performance, they must eliminate the previous wire connections and switch to printed circuit boards. PCB meets the space / performance and reliability requirements very well.
Not every electrical appliance needs a circuit board, and simple electrical appliances do not need circuits such as motors. But electrical appliances with specific functions generally need circuit boards to achieve many things, such as televisions, radios, computers and so on. There is also a PCB board at the bottom of the rice cooker, the governor in the fan.
 
What kind of products use PCB boards:
PCB generally refers to hard circuit boards, such as computer motherboards, mouse boards, graphics cards, office equipment, printers, photocopiers, remote controls, all kinds of chargers, calculators, digital cameras, radios, TV motherboards, limited TV amplifiers, mobile phones, washing machines, electronic scales, telephones, LED lamps, home appliances: air conditioners, refrigerators, stereos, MP3; Industrial equipment, GPS, vehicles, instrumentation, medical instruments, aircraft, military weapons, missiles, satellites, etc. (another way is to do the same with APCB. It is also a circuit board, but it is only soft, for example, the circuit between the cover and the key of the flip phone is a soft circuit board.
The main board of the mobile phone, the keypad, is the hard board; the connection cable of the slide phone or flip phone is the soft board. The remote control usually uses carbon film plate. From top to bottom, the mobile phone board is radio frequency circuit, power supply circuit, audio circuit and logic circuit.
Generally, there is no circuit board in the heated kettle, 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 generally plays the functions of speed regulation, timing, display and so on, which has no practical effect with the operation of the electric fan.
 
Which products use double-layer boards and which products use multi-layer boards:
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 board can be achieved, there is no need to use multi-layer board.
 
BGA board (integrated circuit, semiconductor).
Definition: the full name of BGA is the PCB), of Ball Grid Array (ball grid array structure. it is a kind of packaging method in which the integrated circuit uses organic carrier plate.
The utility model has the advantages of: (1) small package area; (2) increased function, more pins; 3PCB board can be self-centered and easy to tin during solution welding; (4) high reliability; (5) good electrical performance, low overall cost and so on.
The PCB board with BGA generally has more small holes, and most customers design the through hole under the BGA as the finished hole diameter 8: 12 milimetrology. The distance from the surface to the hole in the specification of 31.5mil, which is generally not less than 10.5mil. The hole under BGA needs to be plugged, the BGA pad is not allowed to be inked, and the BGA pad is not drilled.
The BGA package has a round or columnar solder joint distributed under the package in the form of an array. The advantage of BGA technology is that although the number of Imax O pins increases, the pin spacing does not decrease but increases, thus increasing the assembly yield; although its power consumption increases, BGA can be welded by controllable collapse chip method, thus its electrothermal performance can be improved, and its thickness and weight are reduced compared with the previous packaging technology. The parasitic parameters are reduced, the signal transmission delay is small, the use frequency is greatly increased, and the assembly can be assembled by coplanar welding with high reliability. the article is posted by Mr.Xiao Wei, Director of Topscom Pcb Layout Design Department,China Topscom provide professional Pcb boards layout design,pcb assembly and manufacturing,full turnkey systems integration box build assembly,contract electronic manufacturing service.
 
PBGA board (CPU processor).
 
The (Plasric BGA) carrier is a common PCB substrate, which is generally a multilayer board composed of 2 or 4 layers of organic materials. the chip is connected to the upper surface of the carrier by wire crimping, and the surface of the plastic molding carrier is connected with an eutectic solder ball array. For example, PemtiumII, III and IV processors in Intel series CPU all use this encapsulation mode.
There is also CDPBGA (Carity Down PBGA), refers to the package with a square depression in the center of the chip area (also known as: cavity area).
Advantages: the packaging cost is relatively low; compared with QFP, it is not vulnerable to mechanical damage; it is suitable for large quantities of electronic assembly; the font is the same as PCB substrate, the thermal expansion coefficient is almost the same, and when soldering, it produces little stress on functions and less impact on the reliability of solder joints.
Disadvantages: easy to absorb moisture.
 
HDI board (mobile phone).
HDI is the abbreviation of high-density interconnection (High Density Interconnector). It is a kind of circuit board with high circuit distribution density, which uses micro-blind buried hole technology.
HDI is a compact product designed for small capacity users. It adopts modular parallel design, one module capacity 1000VA (height 1U), natural cooling, can be placed directly into the 19 "rack, up to 6 modules in parallel. The product adopts full digital signal process control (DSP) technology and a number of patented technologies, has a full range of load adaptability and strong short-term overload capacity, and can not consider the load power factor and peak factor.
 
FPC board.
Flexible circuit board is a highly reliable and excellent flexible printed circuit board based on polyimide or polyester film. Soft board or FPC, for short has the characteristics of high wiring density, light weight and thin thickness.
The production of a high-quality FPC board must have a complete and reasonable production process, from pre-production pretreatment to the final shipment, each procedure must be strictly carried out. In the production process, in order to prevent the low yield caused by too many short circuits or reduce the problems of scrapping and replenishment of FPC boards caused by drilling, Calendering, cutting and other technological problems, and to evaluate how to select materials to achieve the best results of customer use of flexible circuit boards. Prenatal pretreatment is particularly important.
There are three aspects that need to be dealt with in prenatal pretreatment, all of which are completed by engineers. The first is the engineering evaluation of FPC board, which mainly evaluates whether the customer's FPC board can be produced, whether the company's production capacity can meet the customer's board requirements and unit cost. If the project evaluation passes, then we need to prepare materials immediately to meet the supply of raw materials for all production links. Finally, the engineers deal with the customer's CAD structure drawings, gerber line data and other engineering documents to suit the production environment and production specifications of the production equipment, and then delegate the production drawings and MI (Engineering process Card) and other materials to the production department and document control, procurement and other departments to enter the regular production process.
 
Characteristics of flexible Circuit Board (FPC).
1 short: short assembly time.
All lines are configured. Save the connection work of redundant wiring.
2 small: smaller than PCB.
It can effectively reduce the volume of the product. Increase the convenience of carrying.
3 Light: lighter than PCB (hard board).
Can reduce the weight of the final product.
4. Thinner: thinner than PCB
 
Application of flexible circuit board (FPC) (mobile phone, computer, LCD TV, VCD player, HDD)).
1. Mobile phone.
Focus on the light weight and thin thickness of flexible circuit boards. Can effectively save product volume, easily connect the battery, microphone, and press the button.
 
two。 Computer and LCD screen.
The use of flexible circuit board integrated circuit configuration, as well as thin thickness. Convert the digital signal into a picture and present it through the liquid crystal screen.
3. CD Walkman.
Emphasis is placed on the three-dimensional assembly characteristics and thin thickness of flexible circuit boards. Turn the huge CD into a good companion to carry with you.
4. Disk drive.
Both hard and floppy disks rely on the high softness of FPC and the ultra-thin thickness of 0.1mm to read data quickly. Whether it's PC or NOTEBOOK..
5. Latest uses.
Hard disk drive (HDD, hard disk drive) mount circuit (Su print ensi. The constituent elements of cireuit) and nxe packaging board, etc.
Aluminum substrate (LED LCD screen, LED lighting).
Aluminum substrate is a kind of metal-based copper clad laminate with good heat dissipation function. generally, the single panel is composed of three layers, namely circuit layer (copper foil), insulating layer and metal base layer. For high-end use, it is also designed for double panels, with a structure of circuit layer, insulating layer, aluminum base, insulating layer and circuit layer. Very few applications are multilayer plates, which can be made of ordinary multilayer plates bonded with insulating layer and aluminum base.
LED aluminum substrate is PCB, is also the meaning of printed circuit board, but the circuit board material is aluminum alloy, in the past, our general circuit board material is glass fiber, but because the LED heat is bigger, so LED lamps and lanterns with circuit board is generally aluminum substrate, can conduct heat quickly, other equipment or electrical circuit board or fiberglass board!
Common in LED lighting products. There are positive and negative sides, the white side is welded LED pin, the other side shows aluminum color, generally smear heat conduction paste after the heat conduction part contact. At present, there are ceramic substrates and so on.
 
Use.
Aluminum substrate uses: power hybrid IC (HIC).
 
Audio equipment (speaker speakers, loudspeakers).
Input and output amplifiers, balance amplifiers, audio amplifiers, preamplifiers, power amplifiers, etc.
 
Power supply equipment (switching power supply, transformer, inverter, coordinator, etc.).
Switch regulator, DC/AC converter (transformer, inverter power module), SW regulator, etc.
 
Communication electronic equipment (filter, telephone, fax machine).
High frequency amplifier, filter appliance, transmitting circuit.
 
Office automation equipment (servo drive).
Motor drivers, etc.
 
Automobile.
Electronic regulator, igniter, power controller, etc.
 
Computer (CPU board, driver board, power module, etc.).
CPU board, floppy disk drive, power supply device, etc.
 
Power module.
Converter, solid relay, rectifier bridge, etc.
 
Lamps lighting.
With the promotion of energy-saving lamps, a variety of energy-saving gorgeous LED lamps are very popular in the market, and the aluminum substrate used in LED lamps has also begun to be used on a large scale.