الوصف

Membrane switch is also called Touch Keypad, it utilizes PET, PC, FPC and other flexible materials and screen printing technology, which is an entirely sealed plastic electronic
product that combines graphics, keys, signs, conductivity, and switch function.
2：Product's direction:
　　To analyze products in current market, most of them are getting to be short, small,
　　lightweight and thin. Membrane switch is just in accordance with this design, which
　　is an electronic component that in combination of art and technology.

3：Type of membrane switch:
　　Main types: There are many different types and layouts of membrane switch, its
　　　　　　　　basic function like travel, operating force, life time mainly depend on
　　　　　　　　type of key and material. The main types can be sorted as follows:
　　　　　　　　Membrane switch with flat keys, membrane switch with embossed keys
　　　　　　　　(rectangle or dome), membrane switch with metal dome or polydome,
　　　　　　　　tactile or non-tactile, membrane switch with LCD window or embedded
　　　　　　　　LED,and so on...

4：According to the tactile feeling, it can be classified to 3 types.
　* Metal dome keypad: it has metal domes inside, with contacts above them, the
　　　　　　　　　　　electric loop is generated by finger operating.
　　　Advantage:  1) Good tactile feeling.
　　　　　　　　　2) Long lifetime even being used in high temperature condition.
　* Polydome keypad: Poly dome is an embossed dome in the circuitry layer of
　　　　　　　　　　membrane switch, it is quite durable, and the travel is a
　　　　　　　　　　little shorter than metal dome keypad. In some applications,
　　　　　　　　　　the polydome can be processed in top overlay layer, this reduces
　　　　　　　　　　numbers of layer. Operating force is influenced by material
　　　　　　　　　　thickness, diameter and height of the keys.
　　　Advantage:  1) Quite durable.
　　　　　　　　　2) It can be well operated for millions of times.
　* Non-tactile keypad: no tactile feeling, for non-tactile membrane switch, it generally
　　　　　　　　　　　　utilizes other way to show what the Keys’ status is.
　　　Advantages: 1) Available in big area.
　　　　　　　　　2) Lowest cost among all kinds of membrane switches.

5： At TCF, we manufacture complete line of membrane switches, our experienced
　　design team are ready to work with you to design membrane switches to meet
　　your unique needs of your project.
　　1) Graphic overlay with or without embossing.
　　2) Tactile with metal dome or polydome or non-tactile
　　3) Embedded LED or other surface mount components.
　　4) Waterproof or UV resistant.
　　5) Electroluminescent backlighting.
　　6) ESD shielding (Aluminum foil or whole layer with silver and carbon coated).
　　7) Tail with or without connector (male or female pin).