The performances of PCB&PCBA mainly considered

The performances of PCB (Printed Circuit Board) and PCBA (Printed Circuit Board Assembly) mainly include electrical performances such as conductive performances, dielectric constants, dielectric losses, etc.

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1. Thermal performance: This includes thermal conductivity, thermal expansion coefficient, thermal strain, etc.

2. Mechanical performance: The mechanical performance mainly includes hardness, tensile strength, bending strength, etc.

3. Weather resistance: Weather resistance mainly includes heat resistance, cold resistance, humidity resistance, etc.

4. Chemical stability: Chemical stability mainly manifests as corrosion resistance, acid resistance, alkali resistance, etc.

5. Process performance: From the perspective of PCBA, the main consideration is the compatibility of the overall process, including the stability of soldering (reflow soldering, wave peak soldering), washing board, packaging, and other links.

6. Electrical characteristics: Electrical performance, conductive performance, insulation performance, impedance characteristics, capacitance and inductance, electromagnetic compatibility.

All these factors will affect the quality and functional performance of PCB and PCBA. When designing and manufacturing PCB or PCBA, it should be considered comprehensively and optimized according to the usage environment and function requirements.

Here we can specifically concentrate the electrical performance of PCB and PCBA:

The electrical performance of PCB (Printed Circuit Board) and PCBA (Printed Circuit Board Assembly) mainly includes the following aspects:

1. Conductive performance: This is the most basic electrical performance of PCB and PCBA, mainly depending on the conductive properties of the materials used such as metal wires, screen printing, etc.

2. Insulation performance: The insulation layer of PCB and PCBA must have good insulation performance to prevent crosstalk between circuits.

3. Impedance characteristics: High-speed signal transmission PCB / PCBA should consider the impedance control problem of signal lines, including single-end impedance and differential impedance.

4. Capacitance and inductance performance: In the design of the circuit, the layout and wiring of the PCB will form a certain parasitic capacitance and inductance.

5. Electromagnetic compatibility: The design of PCB and PCBA should consider electromagnetic compatibility issues to avoid electromagnetic interference. These are the several main aspects of the electrical performance of PCB and PCBA, but specific contents will change according to the specific application of the circuit and specifications requirements.

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