The PCB board is a printed circuit board, which is a general term for commonly used circuit boards. It is divided into: cardboard, semi-glass fiberboard, fiberglass board, metal substrate, etc. according to the material.
First, fiberglass board (FR4, single-sided, double-sided, multi-layer PCB circuit board, impedance board, blind buried hole board), suitable for electronic digital products such as computers and mobile phones.
There are many kinds of glass fiber board, we will first look together; FR-4 is also known as fiberglass board; glass fiber board; FR4 reinforcing board; FR-4 epoxy board; flame retardant insulation board; Board, FR4 light board; epoxy glass cloth board; circuit board drilling pad, generally used for soft-pack base layer, and then cloth, leather, etc., to make beautiful wall and ceiling decoration. The application is very extensive. With sound absorption, sound insulation, heat insulation, environmental protection, flame retardant and so on.
The fiberglass board is a composite of epoxy resin plus filler and glass fiber.
Main technical features and applications of FR4 light board: stable electrical insulation performance, good flatness, smooth surface, no pits, thickness tolerance exceeding standard, suitable for high performance electronic insulation requirements, such as FPC reinforcement board, tin furnace resistance High temperature plate, carbon film, precision star wheel, PCB test frame, electrical (electrical) equipment insulation separator, insulation pad, transformer insulation, motor insulation, deflection coil terminal plate, electronic switch insulation board, etc.
Due to its good material properties, fiberglass panels are the most widely used in conventional electrical, electronic and digital products. The price is higher than that of paper and semi-glass, and the specific price varies depending on the product requirements. Fiberglass panels are also widely used in digital electronic products.
Due to the special advantages of fiberglass panels, the application in electronic manufacturers is also very wide. The panels of glass fiberboards have V-grooves, and there are also various stamping methods such as stamp holes and bridges. Dongguan Chuangwei has developed a number of fiberglass board splitters.
Second, aluminum substrate (single-sided aluminum substrate, double-sided aluminum substrate), aluminum substrate mainly has excellent heat dissipation performance, suitable for LED technology, the bottom plate is aluminum.
The aluminum substrate is a metal-based copper clad laminate with good heat dissipation function. Generally, the single panel is composed of a three-layer structure, which is a circuit layer (copper foil), an insulating layer and a metal base layer. Also used for high-end use is designed as a double panel, the structure is circuit layer, insulation layer, aluminum base, insulation layer, circuit layer. A very small number of applications are multi-layer boards, which can be made of ordinary multi-layer boards combined with an insulating layer and an aluminum base.
The aluminum substrate is a kind of PCB. The aluminum substrate is a metal-based printed board with high thermal conductivity. It is generally used in solar energy, LED lamps and other products that require heat dissipation, but the material of the circuit board is aluminum alloy. The material is glass fiber, but because the LED heat is large, the circuit board for LED lamps is generally an aluminum substrate, which can conduct heat quickly, and the circuit board for other equipment or electrical appliances is still a fiberglass board!
Most of the LED aluminum substrates are used in led energy-saving lamps. LED TVs are also used. They are mainly used on objects that require heat conduction. Because the LED current is larger, the light is brighter, but the temperature is too high, and the temperature is too high. Outside the lamp bead, it is light decay.
The main purpose of aluminum substrate, LED aluminum substrate:
1. Audio equipment: input, output amplifier, balanced amplifier, audio amplifier, preamplifier, power amplifier, etc.
2. Power supply equipment: switching regulator `DC/AC converter `SW regulator, etc.
3. Communication electronic equipment: high frequency amplifier <filtering appliance` reporting circuit.
4. Office automation equipment: motor drives, etc.
5. Car: Electronic regulator `igniter` power controller, etc.
6. Computer: CPU board `floppy disk drive` power supply unit, etc.
7. Power module: Inverter ‘solid relay’ rectifier bridge and so on.
8. Lighting fixtures: With the promotion of energy-saving lamps, various energy-saving LED lamps are popular in the market, and aluminum substrates used in LED lamps are also being applied on a large scale.
Third, on the price of glass fiberboard and aluminum substrate:
The thickness of the fiberglass board FR4 is 0.2 (ultra-thin). 0.4, 0.6. 0.8. 1.0. 1.2. 1.6. 2.0. 3.0. 3.2. What needs to be explained is the impedance plate and the blind buried plate. The greater the difficulty, the more expensive the price will be.
The thinnest aluminum substrate can be 0.3 thick, and the thermal conductivity is 1.02.0.3.0. The higher the heat conduction, the higher the price.
The price of the PCB depends on. Plate, plate thickness, craft, and appearance, as well as the number of holes, the price of the super-hole or super-long plate will be appropriately increased, and if the appearance is more difficult, the height will be adjusted appropriately.