Surface finish involves applying various coatings to a PCB to enhance its solderability and protect it from corrosion. This crucial step affects both the assembly process and the long-term reliability of the board.

Techniques such as HASL, ENIG, and OSP are commonly used to ensure consistent high quality. The optimal finish depends on the application requirements, providing a reliable base for soldering and environmental protection.

Key benefits of a superior surface finish include:

• Enhanced solderability and stable electrical connections.
• Protection against corrosion and oxidation.
• Extended lifespan of the printed circuit board.

Ongoing advances in material science and application-specific demands continue to drive improvements in surface finish technology, ensuring robust performance in critical electronic systems.