Design of membrane switch and working principle of buttons

Before understanding the working principle of the membrane switch, we should first understand which parts the membrane switch is composed of. Only by understanding the composition of the membrane switch can we better understand its working principle. We invite the staff of the membrane switch manufacturer to introduce it to everyone.

Generally speaking, common membrane switches are mainly composed of 6 layers of materials, which are in the order from the top to the bottom: panel, surface adhesive, upper circuit, isolation layer, lower circuit, and bottom adhesive.

The basic working principle of a membrane switch is as follows: when the panel is not pressed, the membrane switch is in a normal state, and its upper and lower contacts are in a disconnected state. The isolation layer acts as an isolation layer for the upper and lower circuits; When the panel is pressed, the contacts of the upper circuit deform downwards, coincide with the lower circuit, and make the circuit conductive. The conductive circuit sends a signal to the external connecting instrument (substrate) to achieve its corresponding function; When the finger is released, the upper circuit contact bounces back, the circuit is disconnected, and the circuit triggers a signal.

Dongguan Xufeng Electronic Technology Co., Ltd. is a professional manufacturer of film switches, mainly providing touch module solution development, ITO button film, touch display module, medical equipment film switch, capacitive film switch, silicone film switch, color film functional film, filling hole film switch, etc