PCBA Tech - What is solder mask sliver?

Solder mask sliver is a manufacturing process for printed circuit boards, which uses a chemical or thermosetting resin to coat a thin film on the circuit board, 

effectively forming a reliable protective layer to avoid unnecessary short circuits and leakage, and improve the reliability and electrical performance of the circuit board.

The function of solder mask sliver

1) Protect the circuit. Solder mask sliver can protect circuit circuits from external environmental and operational interference and damage, 

thereby improving the reliability and lifespan of circuit boards.

2) Isolate circuit lines. Solder mask sliver can isolate circuit lines, reduce interference and noise on the circuit board, and improve the stability and reliability of the circuit board.

3) Prevent short circuits and leakage. Solder mask sliver can prevent short circuits and leakage between various components, ensuring the stability of the circuit.

4) Improve welding quality. Solder mask sliver can create obstacles in areas that do not require welding, ensuring that the solder paste only adheres to the solder pad 

and avoiding errors during assembly.

5) Prevent solder paste from overflowing. Solder mask sliver can prevent the solder paste from overflowing after semi curing and avoid short circuits between components.

6) Convenient maintenance and testing. The presence of solder mask layer can reduce the visibility of welding points, making it easier for subsequent maintenance and inspection.

7) Prevent corrosion. Solder mask sliver can reduce the damage of oxygen, moisture and other factors to circuit boards, and alleviate copper corrosion.

8) Easy to weld. The surface of the circuit board after solder mask, with clear solder pad positions, facilitates welding.

9) Beautify the circuit board. The color and brightness of the solder mask layer can be controlled to beautify the appearance of the circuit board.

The solder mask sliver on the PCB board plays a crucial role in protecting and optimizing circuit performance. It can improve the reliability of circuits, protect components, 

improve welding quality, and facilitate maintenance and debugging work.