What is a flexible membrane switch keypad?

Flexible Membrane Switch keypad

Flexible membrane switches are a special category of membrane switches. The reason why this type of membrane switch is called flexible is because the membrane panel layer, isolation layer and circuit layer of the membrane switch are all composed of flexible films with different material properties. The circuit layer of the flexible membrane switch uses polyester membrane (PET) with good electrical performance as the carrier of the switch membrane circuit pattern. The PET material glossy or matt surface has good chemical resistance, and has excellent mechanical properties, electrical properties, rigidity, Hardness and maximum toughness in thermoplastics. This layer also assembles the touch feel metal dome, upper circuit and lower circuit. Due to the influence of the properties of polyester film, the membrane switch has good insulation, heat resistance, folding resistance and high resilience. Membrane switch circuit graphics, including switch connections and lead-out tail circuits, are printed with low-resistance, low-temperature-cured conductive paint. Therefore, the composition of the entire membrane switch has a certain flexibility, which is not only suitable for use on a flat body, but also can be matched with a curved body. The lead-out circuit of the flexible membrane switch is a whole with the switch itself. When making the circuit connection of the switch, it is collected in a certain place of the membrane switch, and extends outward according to the position specified by the design and the standard line spacing, as a soft, The lead wire that can be bent freely and sealed is connected to the circuit of the whole machine.

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