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The metal dome membrane switch is made up of several layers of materials, including a metal dome, a spacer layer, and a circuit layer. The metal dome is the top layer of the switch and is responsible for providing tactile feedback when pressed. The spacer layer is located below the metal dome and is used to separate the metal dome from the circuit layer. The circuit layer is the bottom layer of the switch and is responsible for conducting electricity when the switch is pressed.
A metal dome membrane switch consists of several components, including:
The metal dome membrane switch is a popular choice for electronic devices because it is durable, reliable, and provides tactile feedback to the user. Additionally, it is easy to manufacture and can be customized to fit the specific needs of your device. Overall, if you’re looking for a switch that is both reliable and provides a good user experience, then a metal dome membrane switch might be the perfect choice for you.
Acrylic (or PMMA – Polymethyl Methacrylate) is a rigid and transparent material that is often used as an alternative to using glass as it is often cheaper and slightly more flexible. It can be printed on the front or backside to change its color and add graphics or instructional information. Acrylic is often used as an overlay with cutouts for rubber switches or without cutouts for capacitive sensing applications.
Silver Flex membrane switch panels utilize screen-printed silver and carbon conductive inks printed on flexible polyester layers separated by an adhesive spacer. This is the most common design used in flexible, custom membrane keypads, offering a slim, space-saving design.
Silver Flexible circuity is also more cost-effective when compared to electromechanical switch assemblies and the process of screen-printing conductive silver inks onto a flexible, film substrate poses less potential threat to the environment compared to chemically etched copper.
Silver Flex membrane switches offer you a variety of design options:
Additionally, a Silver Flex membrane switch uses a graphic overlay, which also has a number of design options:
| Membrane Switch Keyboard Construct | |||
| Description | Finish | Specification | |
| Graphic Overlay | PC (polycarbonate) |
Gloss | 0.175/.25/.35/.5 mm thickness |
| Matt | 0.175/.25/.35/.5 mm thickness | ||
| PET (polyester) | Fine Texture | 0.15/.20 mm thickness (Autotex F150/F200, imported) | |
| Velvet Texture | 0.15/.20 mm thickness (Autotex V150/V200, imported) | ||
| Gloss with Hard Coat | 0.18 mm thickness | ||
| Top Adhesive | PET Double-sided adhesive | 3M467 / 468MP / 200MP / 9080MP / 55280MP / 300MP / 9648MP / 4951 | 0.10/.22/.28 mm thickness |
| Paper Double-sided Tape | 0.10 mm thickness | ||
| Transfer Tape | 0.06/.12 mm thickness | ||
| Electrical Properties | |||
| Operating Voltage | ≤50VDC | ||
| Working Current | ≤100 mA | ||
| Loop Resistance | <200 Ω | ||
| Expected Life (Flat) | ≥5 Million times | ||
| Expected Life (Metal dome) | ≥1 Million times | ||
| Mechanical Properties | |||
| Operation Force (Flat) | 57~284g (2~10oz) | ||
| Operation Force (Tactile) | 130g~Customerized (Metal dome can accept customized as request) | ||
| Operation Height (Flat) | 0.1~0.5mm | ||
| Operation Height (Tactile) | 0.6~1.5mm (related of chosen metal dome force) | ||
| Environment Parameter | |||
| Operation Temperature | -40~+80 degree centigrade | ||
| Storage Temperature | -10~+85 degree centigrade | ||
| Humidity | 90%~95%, 240 hours | ||
| Atmospheric Pressure | 80~108kda | ||
Packing: 10-25 pcs per PE bag which is based on the product feature and Foam around Bags, Then in Carton. The carton box size is 15cmx25cmx30cm or as per customer request.
Shipping: FedEx / DHL / UPS / TNT / EMS.
Our factory design and manufacture cutting edge Membrane Switches, Membrane Keypads, Integrated Touch Screens, Flexible Circuits, Graphic Overlays, Rubber Keypads, PCB Designs, Sense Touch Technology, Durable switch products and more.
We pride ourselves on the reliability and quality of our Membrane Switch innovations. China based engineering support combined with domestic quick turn manufacturing enable tiantai to provide the range of technologies and lead times needed to bring quality and competitive pricing to your project.
