First, let's understand what PCB is. PCB stands for Printed Circuit Board, which is one of the core components in electronic devices. It connects various electronic components such as chips, resistors, capacitors, etc. through conductive paths on one or more layers of insulating substrates to realize the function of the circuit. And these electronic components usually need to be connected to the outside world, which is where the gold fingers come into play.
The name of the gold finger comes from its appearance, which usually has a layer of metal coating such as gold, nickel or tin. This helps to provide a good electrical connection, reduce resistance and improve corrosion resistance. The choice of metal coating usually depends on the specific application and cost factors. Gold fingers are usually located at the edge or specific position of the PCB. They are some metal contacts or contacts that coincide with the slots of other devices or connectors. This design makes it easier to plug or unplug electronic devices without complicated soldering or connections. Gold fingers are often likened to the "interface" of electronic devi
