Membrane Switches | Membrane Keypads | Membrane Keyboards
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Membrane Switches

A membrane switch is a thin-layered (membrane) switch produced with polyester and adhesive components. It can also be made upon a P.C. Board and it can have surface mount components such as L.E.D.'s incorporated into the assembly. Membrane switches can be produced with or without a Graphic Overlay. The Graphic Overlay can have many options included in it such as windows and L.E.D. apertures, embossed keypads, and special finishes, to name just a few.

Membrane switches are electrical input devices that are manufactured by integrating a polyester screen printed circuit and adhesive layers. The typical membrane switch assembly consists of graphic overlay, graphic adhesive, top circuit, circuit spacer, bottom circuit and rear adhesive.

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Membrane switch is fastly outdating the present type of the electronic switches i.e. micro switch, push button switches, silicon rubber keypads etc. Membrane Switch is gaining widespread popularity and use because of its various characteristics. Membrane Switch is dust-proof, humidity proof, heat proof (can work even at 100 °C and -10°C). This is so because the membrane switches are completely sealed and polyester sheets are used to manufacture the membrane switches. Polyester sheets has the softening temperature of 125°C and melting temperature of 250°C. Membrane switches have contact life of more than 5 million contacts for non-tactile and more than 2 million contacts for the tactile type.

Membrane Switches classification
Tactile Membrane Switch : Tactile are those having the positive sensation of the key pressing. They give a good physical and audible feedback of the pressing of the key. They have contact life of more than 2 million contacts. The tactile points generate the tactile effects. The switch is a custom, tactile array of normally open single pole single throw (SPST) switches. The design employs individual tactile point for both tactile feedback and electrical contact. Pressure applied to the top layer partially inverts the tactile point to complete the circuit. Tactile points provide consistent electrical and mechanical operation in applications requiring low current momentary tactile switches.
 
Non Tactile Membrane Switch : These do not have any sensation of the key pressing. They have contact life of more than 5 million contacts. These are also known as the feather touch membrane switches and micromotion membrane switches. The switches are custom, non tactile array of normally open single pole single throw (SPST). The design consists of a top and bottom circuit, an insulation spacer and an optional graphic overlay.
 
Membrane Keypad Switches
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ASM Circuits Pvt. Ltd. is one of the leading manufacturers and exporters of membrane keypad in India. The organization also exports premium quality highly durable membrane switch, keyboard overlays, control panel overlays, key board and labels for electronic industry.

ASM Circuits Pvt. Ltd. manufactures membrane keypad to provide absolute reliability, even in the most hostile operating environments. All materials for membrane keypads are obtained from leading manufacturers including Autotype International, GE Plastics and 3M. They are carefully selected for each application to provide the required specification, which may include scratch or chemical resistance, flexibility or low cost.
An established leader in production of membrane switches , Nelson specializes in applications with stringent cosmetic and reliability requirements. Our state-of-the-art screen printing, color matching, die cutting and laminating processes, combined with environmental and life cycle testing, assure that each membrane switch meets or exceeds our customers' requirements.
Membrane Keyboard Switches
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At ASM Circuits Pvt. Ltd., we specialise in providing a comprehensive service. From the design stage, through development, to final manufacture, we aim to give you constructive technical advice and practical assistance.
Tactile Membrane switch: These are momentary-contact membrane keyboards, which are designed specially for carrying voltage signals by using metal domes or poly domes. The life expectancy of these keys is 2 million operators.

Non-Tactile Membrane switches: Non-Tactile Keyboard is momentary contact membrane keyboards designed to carry low voltage signals. These keyboards are made without metal domes and need less pressure to activate key. The life expectancy of each key in these keyboards are very high at over 50,00,000 cycles.

 
 
 
 
 
 
 
 
 
 
 
 
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