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Tactile keypads are momentary contact switches, meaning they are only active while being pressed. Tactile keypads provide physical feedback to the user through a metal dome or formed plastic dome beneath the overlay. When a tactile key is pressed, the dome collapses and contacts the conductive under layer, completing the circuit and creating an action sequence.
When the user removes pressure from the tactile key, the dome pops back up, eliminating the circuit connection and causing the action to stop. They are internally vented and sealed to prevent contamination.
Tactile keyboard switches are used for many household devices, like remote controls and appliances. They also work great in noisy environments where a physical response is a more efficient message than a sound or visual cue.
Non-tactile keypads are similar to a tactile switch, but when pressed, there is no tangible feedback response. Instead, non-tactile keypads require another way to alert the user that the switch has been activated. Typically, they rely on an audible or visual response from the unit.
Instead of a metal or plastic dome beneath the overlay, the non-tactile switch uses two layers of polyester with a conductive coating on each layer. When a user pushes a non-tactile key, the polyester layers flex and make contact closing the circuit and initiating an action.
Since they may utilize a thicker graphic overlay for increased ruggedization and protection, non-tactile keypads are frequently used for applications used in extreme environments. Non-tactile keypad constructions are exceptionally reliable and can be easily incorporated into complex user interfaces.
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 / 0.25 / 0.35 / 0.5 mm thickness |
| Matt | 0.175 / 0.25 / 0.35 / 0.5 mm thickness | ||
| PET (polyester) | Fine Texture | 0.15 / 0.20 mm thickness (Autotex F150/F200, imported) | |
| Velvet Texture | 0.15 / 0.20 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 / 0.22 / 0.28 mm thickness |
| Paper Double-sided Tape | 0.10 mm thickness | ||
| Transfer Tape | 0.06 / 0.12 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~Customized (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 °C | ||
| Storage Temperature | -10 ~ +85 °C | ||
| Humidity | 90%~95%, 240 hours | ||
| Atmospheric Pressure | 80~108 kPa | ||
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 15cm x 25cm x 30cm 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.
Sincerely welcome to visit our factory!
General membrane panel manufacturing considerations:
