Rubber Keypad

Luphi Electronics is a global leader in the custom design and manufacture of elastomer switches and custom silicone rubber keypads.

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What is Rubber Keypad?

Luphi Electronics is a global leader in the custom design and manufacture of elastomer switches and custom silicone rubber keypads. Silicone rubber keypads are widely used in testing instruments, handheld terminals, mechanical equipment, military equipment, measuring instruments, boats and yachts, rail transportation, and other fields due to their excellent heat resistance, cold resistance, environmental resistance, electrical insulation, fatigue resistance, and other characteristics. When developing and designing silicone keypads, it is necessary to consider the diameter, length, width, height, thickness, key travel distance, actuation force requirements, product hardness, color, and conductive requirements of silicone rubber products.

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Regular Technical Parameters of Silicone Keypad

Key Actuation Force: 20 to 500 grams

Contact Resistance: less than 150 ohms

Key’s Life: 1 million to 30 million times

Operating Temperature: -20°C to 180°C

Storage Temperature: -30°C to 250°C

Insulation Resistance: more than 10^{12}, ohms at 500V DC

Insulation Capacity: 25 to 30 kV/mm

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Application Suggestions for Silicone Rubber Keypads With Different Actuation Forces

Approximately 50-80g: generally suitable for silicone keypads on computer keyboards and calculators. This range has low pressure, making it easy to press, suitable for buttons that are frequently clicked.
Approximately 80-120g: generally suitable for electrical buttons and remote control buttons. The pressure is moderate, providing a comfortable feel and good rebound.
Approximately 120-180g: generally suitable for impact devices, industrial instruments, and mechanical remote controls. The pressure is significantly higher, suitable for larger silicone keypads, providing superior rebound but not ideal for products with very frequent clicks.
Above 180g: these silicone keypads with higher pressure are less common and are suitable for special industries such as medical, aviation, industrial control, marine and mechanical equipment. Frequent use in a short period can cause finger fatigue.

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Luphi Electronics' Capabilities In Silicone Keypad Processing

Molded silicone button products using hot-press molding

Liquid injection silicone products

Screen printing of characters and patterns

Spraying characters and patterns in different colors

Surface spraying of PU, touch feeling oil, UV-resistant coating

Laser etched backlit characters and patterns

Planting conductive carbon pills or gold pills on the back of buttons

Joystick/rocker silicone keypads

P+R silicone rubber keypads

Integration of electronic circuits to form silicone keypad switch subassemblies

Silicone Keypad Switch Subassemblies

A silicone keypad switch(also called rubber keypad switch) is an electronic component composed of an upper silicone rubber keypad and a bottom electronic circuit layer. The silicone keypad itself does not have any functionality, it is purely an input device. To transmit the "press-button" signal to the client control board, a circuit is needed as the carrier for signal transmission. In a silicone switch, the electronic circuit can be PET, PCB, or FPC, with PCB being the most common. Generally, the back of the silicone keypad has conductive carbon pills. When the button is pressed, the conductive carbon pills contact the keys’ conductive pads on the circuit below, becoming an electrical circuit loop. In addition to conductive carbon pills, metal domes from membrane switches can also be used for electrical connection. By assembling LEDs on the circuit and using laser etched backlit characters, a backlit silicone keypad subassembly can be created. Additionally, PET graphic overlays can be attached to the surface of the silicone keypads, exposing only the buttons. The edges of the silicone keypads can also be designed with edging to enclose the circuit layer below, achieving better waterproofing.

A Customer’s Words Mean More Than Ours

Of course , I am an Electronic designer, after we design our own electric circuit and graphic overlay , so we ask our business partner , luphitouch, to complete our designing conception, they can finish our task perfectly, thanks for them very much !

Jassica Mara
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The most of our membrane switches are from LuphiTouch, their quality is so well , delivery time is rightly , but also our client feedback his control panel is so easy and convenient to operate, of cousre , we like them so much !

Robin Ton
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I am happy that I can introduce our good supplier to everyone. We freqency buy some membrane switches and printed electric circuit and graphic overlay from luphitouch, although I haven't a new order every month, we feel their service is so good !

Henry Sam
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I trust our business partner very much, that is Luphitouch , I have visited their factory four times, their workshop is clear , and dity, and have an around production management system, I have a ease rest that our product can be produced in this factory !

Magar Faw
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