Because the membrane switch uses a good pressure-sensitive adhesive layer and the stable performance of Polyester, Lexan, Polycarbonate one of the materials together. Membrane switch can be designed to meet NEMA 4 and IP 67, some products can even reach IP68.
First, it is not easy to be invaded by dust, and secondly, it reduces the space of the product.
Membrane switches are easier to clean the surface than other mechanical keyboards.
Compared with touch keyboard and silicone rubber keyboard, membrane switch cost will be more affordable.
The topmost panel of the membrane switch can be the most conventional screen printing or digital printing. Niceone-tech can design the product to achieve the best visual effect. At the same time display the company logo and key functions on the panel.
Through the design of membrane switches can achieve antibacterial, anti-ultraviolet and other effects.
Overlay-Polyester is usually the first choice for membrane switch panel materials, because its life will be a little longer than Polycarbonate. If it is simply a panel instead of a membrane switch, Lexan and Polyester are also good choices. The overlay is the most intuitive form of human-machine interface. Niceone-tech will screen print or digital print on the back of the material, and they can also be used in combination. Special requirements such as mirror silver effect are also feasible.
As the first layer of adhesive paper under the panel, the Acrylic adhesive is usually used, generally the thickness is between 0.125-0.225mm. If it is
LGF membrane switch structure, the thickness sometimes reaches 0.64mm.
This layer usually has three functions: 1. As the Dome Retainer, it ensures that the Snap dome of the circuit layer will not form shrapnel movement due to triggering and closing, resulting in circuit failure and circuit wear. 2. Use 0.1-0.125mm Polyester printing conductive ink, carbon oil, and UV ink as the upper line. This layer structure can also be convex to make tactile feedback better. 3. Can be used as an ESD shielding layer.
Both upper and lower lines are printed with conductive ink, usually thicker tape is used to separate the upper and lower lines to avoid direct conduction of the membrane switch. If the upper circuit is only used as a fixed layer, then the general thickness of the Overlay adhesive + Top Circuit Layer + Lower Circuit Layer should be greater than 0.4mm, otherwise, the panel will squeeze the shrapnel to make them feel worse. Unless the panel is convex, the four-layer structure is less than 0.4mm.
The thickness of this layer circuit is usually 0.1-0.188mm. It can be printed with ink, carbon oil, and UV ink. LEDs can also be installed. Some membrane switch panels will choose the copper flex or Printing circuit Board as the circuit. Compared with Polyester, their performance will be more stable. More often applied to the medical and military industries. If it is copper flex or Printing circuit Board as a line, Niceone-tech can even install a variety of components on the line.
There are many choices, but the most commonly used are 3M200MP series or 3M300LSE. According to the different products of membrane switch lamination, Niceone-tech will recommend 3M300LSE if it needs higher viscosity.
This layer structure is generally used as the last layer of the membrane switch, which can make the structure of the membrane switch component more complete. Usually, the choice of materials is AL, FR4, PC, or steel. If AL is selected, nuts or feet may sometimes be added to the back of the product.
Many working environments and machines will be used in low light or dark conditions. At this time, the customer asked us if we could solve this problem. At this time we will recommend the use of membrane switches with internal lighting. Choose EL film as the light guide plate, Fiber Optics, and the newer light guide film (LGF) structure. Niceone-tech recommends LGF, which uses side LEDs and light guide panels to make the product have a lower loss and longer life relative to the EL membrane switch. Also available in different colors.
The thickness of the LGF membrane switch provided by Niceone-tech can even be 0.8mm. The brightness of buttons and logos is not only uniform and long-lasting but more importantly, we can also make them illuminate each button individually. Sometimes you can also use two-color or RGB
three-color lights to enter.
One step makes the product more beautiful.
*If the customer wants the product to be more novel and beautiful, then we can sometimes use Epoxy in combination with the keys. Makes it an Epoxy LGF membrane switch.
If you are interested in Backlit Membrane Switch, please feel free to contact Niceone-tech, we will send samples as soon as possible.
There are three other types of illuminating membrane switches below:
Fiber optic membrane switches are also a good choice for backlighting. The optical fiber material is very thin and can be used as a fixed layer of the membrane switch. At the same time, tactile feedback is better without adding a touchpoint. Life expectancy is up to 50,000 to 100,000 hours. The main light source is from LEDs.
Through the optical fiber transmission in the membrane switch needs to light up. And can be larger than the surface-mounted LED backlight area. Click the fiber optics membrane switch for more information.
EL backlight is driven by high frequency and low power. EL is very thin, it is a substitute for traditional lighting technology, and is widely used in various electronic accessories. The life of EL backlight products mainly depends on the driving voltage, frequency, temperature, and humidity. But most EL membrane switches can reach a life of 4000 hours or more. The brightness of the EL membrane switch will attenuate linearly from the initial power-on. This is also an unavoidable disadvantage relative to other backlight membrane switch panels.
The EL backlit membrane switch provided by Niceone-tech will not cause heat, electricity, and EMI problems. Mainly EL is more often a "cold" lighting medium.
A common Light Emitting Diodes membrane switch with relatively low cost. Since this technology membrane switch cannot meet the lighting of a large area, it is mostly used for indication purposes. It is a relatively old technology. But the service life is long and deep customers love it.
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