The pro and con of the gold finger and its application on the PCB.
- Gold finger is the metal connector on the PCB, and gold finger is also known as Gold tips or Gold tabs.
- Gold fingers are the gold plated connectors on the edge of PCB that arranged like fingers. During PCB manufacture process, gold finger will be coated with a layer of gold through a special process on the copper cad lamination. However, today, many PCB designer has replacing the surface finish of gold finger by tin plating.
- For PCB designer, the aim of gold finger is to connect the PCB by compressing the corresponding slots with connector, which allows its to communicate with one device to another.
- The advantages of using plating gold on gold fingers for the PCB: The gold finger can resist oxidation and it is durable with high conductivity.
- The disadvantages of gold finger on the PCB: it has relatively uneven surface, the needs of connecting line and the price of gold finger is extremely expensive.
- The difference between applying immersion gold and plating gold on the gold fingers is that immersion gold is easier to solder compare to plating gold and will not affect the signal, it is also hard to get oxidized. However the immersion gold is less durable.
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