What are the benefits of using FPC membrane switches
Time of issue：
The difference between FPC membrane switches and ordinary membrane switches is that the circuit is no longer a pasted printed circuit, but a more stable FPC circuit information, which is more resistant to high temperature and corrosion. FPC membrane switches circuit layer with flexible circuit board. The circuit has high precision, output interval of 1.0mm, low resistance value, stable and reliable performance and long service life. This type of membrane switch is called a flexible membrane, because the membrane switch mask layer, isolation layer and circuit layer are composed of various properties of the soft membrane. The circuit layer of FPC membrane switches is made of pet with good electrical properties, which is used as a carrier for switching circuit patterns. This layer is also divided into induction shrapnel and upper and lower loops. Due to the properties of polyester film, FPC membrane switches enable membrane switches with good insulation, heat resistance, folding resistance and high resilience. The circuit of the switch circuit, including the switch connections and their leads, is printed with a low resistance conductive coating and cured at low temperature.
A critical part of the protrusion of the FPC membrane switches is to press the critical body area on the mask layer with a roller press. According to the natural characteristics and concave-convex characteristics of membrane switch materials, there are strict requirements on temperature and pressure. The basic form is as follows:
(1) Wire slot: switch the side slot when in use.
(2) Flat protrusion: used when the entire switch is located above the panel surface. Bulbous: Used to handle spherical keys.
(3) Protrusion + protrusion: not commonly used.
The advantages of the raised button of the membrane switch are: (1) The decorative effect of the appearance of the membrane switch is improved. (2) The operator's tactile sense is more sensitive. (3) The exact range of a given key body. (4) Speed up the recognition speed. The following factors should be considered when designing FPC membrane switches: (1) Special mold processing is required. (2) The limit temperature of the improved polyester is 50°C (3), and the expansion height cannot exceed 1.5 times the thickness of the material. (4) The plane projection is at least 3 mm or 5 mm from the edge. (5) Raised keys on the frame line are at least 5 mm from the edge. (6) Excessive force will reduce the mechanical life.