In the field of optical materials, there is a thin film—just 0.1 to 0.125 millimeters thick—that is quietly transforming the way people interact with electronic devices: the LGF light guide film.
Dome switch, also known as metal dome, are miniature electronic components made from ultra-thin stainless steel (typically SUS301 or SUS304) with a thickness of just 0.05–0.1 mm. They have gradually expanded into high-end fields such as the automotive, medical, industrial, smart home, and even aerospace and defense sectors.
Hongmao’s mainstream panel and circuit substrate materials are primarily polyester (PET) and polycarbonate (PC). Thanks to its excellent chemical resistance, outstanding resistance to flexural fatigue, and dimensional stability, PET has become the preferred choice for circuit layers.
One might say that a ruler, being such a commonplace item in daily life, is hardly remarkable. Surely anyone in their right mind should know how to use one. Yet I've discovered that in the manufacturing process of membrane switches, more than just a ruler is required.
LGF light-guiding film/sheet achieves superior light distribution by incorporating an LGF layer onto conventional dual-layer or EMI-structured conductive films. Its operating principle leverages the principles of light reflection and refraction, combined with specialised optical software design, to apply microstructural processing onto the fibre-optic film.
A membrane switch key that remains depressed and fails to spring back is also known as a dead key phenomenon, which is fatal for the membrane switch; it directly causes the entire product to malfunction. So why does the dead key phenomenon occur? Let us briefly analyse the causes below:
