One-stop PCB assembly factory will tell you what are the characteristics of high reliability PCB? The important characteristics of high reliability PCB. As the core substrate of electronic products, PCB's quality and reliability directly affect the quality and reliability of electronic products. Therefore, high-reliability PCB has become a basic requirement for many electronic products.

Important Characteristics of High Reliability PCBs

1. Achieving a hole wall copper thickness of 25μm can enhance reliability, including improving the expansion resistance of the Z-axis;

2. A perfect circuit can ensure reliability and safety. High-reliability PCBs generally require no welding repairs or circuit break repairs, so that risks such as circuit board breaks can be avoided.

3. The accumulation of residue and solder on the circuit board will bring risks to the solder mask. Ionic residue will cause corrosion and contamination risks on the welding surface, which may lead to reliability problems such as bad solder joints/electrical failures, and ultimately increase the risk of actual failures. probability of occurrence, a PCB that exceeds the cleanliness requirements of the IPC specification can improve its reliability.

4. The surface treatment of old circuit boards will undergo metallographic changes, which may cause solderability problems. Moisture intrusion may cause problems such as delamination, separation of inner layers and hole walls (open circuits) during the assembly process or actual use. Therefore, high-reliability PCBs will strictly control the service life of each surface treatment.

5. Poor mechanical properties mean that the circuit board cannot perform as expected under assembly conditions. For example, high expansion performance will lead to delamination, disconnection and warping problems. Weakened electrical characteristics can lead to problems such as poor impedance performance. Therefore, high-reliability PCB factories will use internationally renowned substrates, such as Shengyi, Jiantao, Lianmao and other well-known brands. KINJI PCB factories use these substrates to ensure High reliability of customer PCB products.

6. Since the electrical performance may not meet the specified requirements, the output/performance of the same batch of components will be greatly different. High-reliability PCB factories will strictly control the thickness of the dielectric layer to reduce the deviation of the expected electrical performance.

7. Inferior ink can cause adhesion, flux resistance and hardness problems. All of these problems can cause the solder mask to detach from the circuit board and ultimately lead to corrosion of the copper circuit. Poor insulation properties can cause short circuits due to accidental electrical continuity/arcing. High-reliability PCB factories will strictly define solder mask materials to ensure compliance with IPC-SM-840ClassT requirements.

8. High-reliability PCBs will strictly define the tolerances of appearance, holes and other mechanical features, which will greatly improve the dimensional quality of the product - improving fit, appearance and function.

9. A thin solder mask layer can cause adhesion, flux resistance and hardness problems. NCAB, a high-reliability PCB factory, specifies the thickness of the solder mask layer, although the IPC does not have relevant regulations.

10. High-reliability PCB factories have defined appearance requirements and repair requirements, and carefully cared for and carefully created safety during the manufacturing process to avoid various scratches, small damages, repairs and repairs.