The metal dome / snap dome is an important part of the switch. Metal dome are mainly used in membrane switches, contact switches, PCB boards, FPC boards, medical equipment and other products. The metal dome on the membrane button is located on the conductive part of the PCB. When pressed, the center point of the dome is concave and touches the circuit on the PCB to form a loop. The current passes through and the entire product can work normally. Dongchen is a professional metal dome manufacturer, which can custom metal domes that meet customer requirements according to the customer's requirements for resistance. Our metal dome also has various surface treatments such as nickel plating, silver plating and gold plating.