In electronic devices, PCBA circuit boards are essential core components that carry the important task of achieving device functionality. For procurement personnel of electronic equipment manufacturers, understanding the production materials of PCBA circuit boards is crucial. This not only affects product quality, but also directly affects production costs and later maintenance.
1、 Substrate material
The substrate is the foundation of PCBA circuit boards, and its quality directly affects the performance and stability of the circuit board. Common substrate materials include FR4, CEM-1, and aluminum substrates.
FR4: This is a composite material with epoxy resin as the adhesive and glass fiber cloth as the reinforcing material. FR4 has high mechanical strength and electrical performance, and is widely used in various electronic devices.
CEM-1: Similar to FR4, but using a different resin system and fiberglass cloth. CEM-1 has good heat resistance and processability, making it suitable for electronic devices in high-temperature environments.
Aluminum substrate: Aluminum substrate is made of metal aluminum as the substrate, which has good heat dissipation performance and is particularly suitable for high-power density products, such as LED lamps.
2、 Electronic components
Electronic components are the core components on PCBA circuit boards, responsible for implementing various functions of the circuit. It mainly includes the following categories:Passive components such as resistors, capacitors, and inductors: These components play a role in regulating current, voltage, and signals in a circuit and are the basic components on a circuit board.
Transistors, integrated circuits, and other active components: These components are responsible for signal amplification, processing, and control, and are key to achieving circuit functionality.
Connectors and sockets: used for connecting and expanding circuit boards, facilitating equipment assembly and maintenance.
3、 Welding materials
Welding materials play a crucial role in the production of PCBA circuit boards, mainly including solder, solder paste, and flux.
Soldering: Soldering is a metal material used for soldering electronic components, which has good conductivity and wettability. According to different welding requirements, the composition and proportion of solder will also vary.
Solder paste: Solder paste is a mixture of solder powder, flux, and adhesive used for surface mount component welding. The selection of solder paste directly affects the welding quality and reliability.
Flux: The main function of flux is to remove oxides from the welding surface, reduce welding temperature, and improve welding quality. Common fluxes include rosin, activator, etc.
4、 Other auxiliary materials
In addition to the main materials mentioned above, the production of PCBA circuit boards also requires some auxiliary materials, such as insulation materials, heat dissipation materials, and identification materials.
Insulation material: used to protect circuit boards and components from electrical short circuits and damage. Common insulation materials include insulation paper, insulation tape, etc.
Heat dissipation material: used to improve the heat dissipation performance of electronic devices and prevent equipment from overheating and damage. Common heat dissipation materials include heat sinks, fans, etc.
Identification material: used to identify information such as the model and production date of the circuit board, facilitating equipment maintenance and management.
The production materials for PCBA circuit boards include substrate materials, electronic components, welding materials, and auxiliary materials. The selection of these materials directly affects the performance, quality, and cost of the circuit board.
