membrane switch,

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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. 1：Membrane switch has below main advantages. 　　　　1）Small and portable. Generally a membrane switch is several or dozens 　　　　　 grams, it is quite convenient to carry or disassemble. 　　　　2）Aesthetic appearance. It adopts advanced silk screen printing technology, 　　　　　 with special design; we can provide any custom solution you need. 　　　　3）Sealing. To meet customer's unique needs of the program, we can design 　　　　　 the membrane switch to be water- proof, grease proofing, dust-proof, and 　　　　　 static-free... with unique technologies, the membrane switch can endure a 　　　　　 high voltage. 　　　　4）Good conductivity. The circuitry is printed with carbon, silver, copper foil and 　　　　　 so on, it can be freely folded, and the resistance can be limited according to 　　　　　 customer's specification. 　　　　5）Low cost. Membrane switch is low price, some even costs only cents. 　　　　　 Compare to other electronic components which have same function, it is 　　　　　 exactly cheap price. 　　　　6）Long lifetime. The materials are with high isolation, thermal resistance, fold 　　　　　 resistance and rebound resilience. Moreover, the graphic can not be 　　　　　 damaged because of its second surface printing; the lifetime is usually 　　　　　 above 3 years. 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

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Shenzhen Tongchuangfa Electronics CO., LTD

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