Four common surface treatment methods for PCB prototyping—HASL (Tin Plating), Chemical Nickel Gold, Electroplated Nickel Gold, and Nickel Palladium—highlighting their distinct advantages such as cost-effectiveness, lead-free soldering compatibility, and suitability for fine circuit patterns and various PCB applications.
Four Types of Surface Finishes for PCB Prototyping Read More »
The article explains the distinctions between hard gold, soft gold, and flash gold in PCB manufacturing, emphasizing their compositions, applications, and electroplating processes, while clarifying common misconceptions in the industry.
PCB factories use various surface treatment methods for PCB prototyping, each with unique characteristics. Chemical silver is recommended for lead-free soldering and SMT, while HASL offers complete wetting of the copper surface and is suitable for lead-free soldering and visual inspection. Nickel gold is suitable for lead-free soldering, SMT, and resistance to environmental attacks. Electroplated nickel-gold is widely used for contact switch design, gold wire binding, and electrical testing. Nickel-Palladium-Gold is suitable for bonding gold and aluminum wires, lead-free soldering, and is cheaper compared to ENIG.
The electroless nickel/immersion gold process provides a thick protective layer for PCBs, enhancing electrical properties and offering environmental tolerance. Immersion silver falls between organic coating and electroless nickel/immersion gold in complexity, providing good electrical performance. Immersion tin shows promise but faces issues such as tin whisker formation and migration. Other widely used surface treatment processes include nickel-gold electroplating and electroless palladium plating for enhanced welding reliability and surface smoothness.
Characteristics and Development Trends in PCB Surface Treatment Processes Read More »
The electroless nickel/immersion gold process provides a thick protective layer for PCBs, enhancing electrical properties and offering environmental tolerance. Immersion silver falls between organic coating and electroless nickel/immersion gold in complexity, providing good electrical performance. Immersion tin shows promise but faces issues such as tin whisker formation and migration. Other widely used surface treatment processes include nickel-gold electroplating and electroless palladium plating for enhanced welding reliability and surface smoothness.
Characteristics and Development Trends in PCB Surface Treatment Processes Read More »
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