In the electronics industry, “gold” is often used on the surface of products. But do you know what hard gold, soft gold, electroplated gold, ENIG (Electroless Nickel Immersion Gold), and flash gold are in printed circuit boards? What are the differences between them, and what should be considered in their applications?
Workingbear wants to clarify that the information shared in this article is based solely on personal experience and knowledge. Since I haven’t worked directly in the PCB manufacturing industry, my understanding of hard gold, soft gold, and flash gold comes from years of interacting with PCB manufacturers and asking questions. If you notice any mistakes, please feel free to point them out.
