Metal Dome (also known as metal dome or snap dome) is made of ultra-thin (0.05mm-0.1mm thick) and ultra-thick (generally higher hardness) stainless steel 301 or 304 materials. Metal Dome is an important part of the switch. Metal Dome is mainly used in film switches, contact switches, PCB boards, FPC boards, medical devices and other products.
Chinese name: metal fragment, foreign name: metal dome alias: pot slice
Working principle of metal spring piece: the Metal Dome piece on the film key is located at the conductive part on the PCB (most of it is located above the gold finger on the circuit board). When pressed, the center point of the spring piece is concave and touches the circuit on the PCB, thus forming a circuit. When the current passes, the whole product can work normally.
Conventional Metal Dome can be divided into round Metal Dome, cross Metal Dome, triangular Metal Dome and elliptical Metal Dome according to their different shapes. The diameter ranges from 3mm to 20mm, and the strength ranges from 100g to 600gf. Of course, if you have special requirements to make according to your drawings, there is no problem.
In addition, 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.