Views: 18 Author: Site Editor Publish Time: 2021-02-26 Origin: Site
Button film, also known as metal dome array. It is a PET sheet containing metal shrapnel, which is used as a switch on a circuit board such as PCB or FPC. It plays an important role as a tactile switch between the user and the instrument.
The metal dome array on the membrane button is located on the conductive part of the PCB (mostly above the gold finger on the circuit board). When pressed, the dome's center point is depressed and touches the circuit on the PCB, thereby forming a loop, current Through, the whole product can work normally. Generally, conventional metal shrapnels are divided into round metal shrapnel, cross-shaped metal shrapnel, triangular metal shrapnel, and elliptical metal shrapnel according to their different shapes.
The working principle of the metal dome array is that the metal dome is located on the conductive part of the PCB/FPC board (mostly above the gold fingers on the circuit board). When pressed, the center point of the dome is depressed and touches the PCB The circuit forms a loop, and the current passes through, and the entire product can work normally.
The metal dome array is used as a switch on a circuit board such as PCB or FPC, which plays an important role as a tactile switch between the user and the instrument. Compared with traditional silicone buttons, the conductive film has better feel, longer life, and can indirectly improve the production efficiency of various types of switches using conductive films.