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Silicone Keypad with Membrane Circuit

PRODUCT PARAMETERS

Design Options:

  • Various duramerers: from 20 to 80 Shore A
  • Printing and Graphic: Screen Printing or Laser Etching
  • Colours: Transparence, multicolour keys
  • Custom Shapes: tailored to fit specific device design
  • Various coatings: Silicone Coating, Polyurethane Coating or Epoxy Coating
  • Electrical contact: Conductive Carbon Pills or ink
  • IP Ratings and UV Resistance
  • Temperature and Chemical Resistance
  • LED Backlighting
  • Adesive Backing
  • Snap-Dome Integration
  • PET/FPC Circuit Integration
  • PCB Mounting
Description
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Description

What is Silicone Keypad?

A silicone keypad is a user interface component made from flexible, durable silicone rubber, providing tactile feedback when pressed. These keypads are highly customizable in shape, size, color, and surface texture, and can include features like backlighting and printed or molded graphics. They are used in various electronic devices such as remote controls, industrial machinery, medical equipment, and consumer electronics due to their resistance to wear, environmental factors, and chemicals. Silicone keypads offer a cost-effective, reliable solution for creating responsive, user-friendly control interfaces in a wide range of applications.

What are the Advantages of Membrane Switch?

Durability: Silicone keypads are highly resistant to wear and tear, making them suitable for devices that experience frequent use. They are resistant to extreme temperatures, UV radiation, water, dust, and various chemicals.

Customisation: Silicone keypads can be molded into various shapes, sizes, and configurations, allowing for customized designs tailored to specific device requirements. Available in multiple colors and finishes, including custom graphics and legends through screen printing, laser etching, or molded designs.

Tactile Feedback: They provide a satisfying tactile response when pressed, which can be customized to offer different levels of feedback depending on the application.

Cost-Effective: Silicone keypads are generally more cost-effective to produce, especially in large volumes, making them a practical choice for many electronic devices

Versatility: Suitable for various industries, including consumer electronics, automotive, medical devices, industrial controls, and telecommunications. Can include features like backlighting (LED or fiber optic), conductive carbon pills for reliable electrical contact, and protective coatings for enhanced durability.

Ease of Use: The tactile response and ergonomic design options make silicone keypads comfortable and intuitive to use. Compared to mechanical keys, silicone keypads often produce less noise, which can be advantageous in certain settings.

Hygiene and Safety: Silicone keypads are easy to clean and maintain, which is particularly beneficial in medical and industrial applications where hygiene is crucial. Made from non-toxic materials, making them safe for use in a wide range of environments.

Lightweight: Silicone keypads are lightweight, contributing to the overall reduction in the weight of portable electronic devices.

Ergonomics: Ergonomic designs enhance user comfort and efficiency, reducing the likelihood of user fatigue over extended periods of use.

Applications of Silicone Keypads

Silicone keypads are used in a wide range of applications, including but not limited to:

  • Consumer Electronics: Remote controls, calculators, game controllers.
  • Industrial Controls: Machinery control panels, handheld devices.
  • Medical Devices: Diagnostic equipment, handheld monitors.
  • Automotive: Dashboard controls, key fobs.
  • Telecommunications: Mobile phones, communication devices.
  • Home Appliances: Microwave ovens, washing machines.

Specifications of FPC

Material Selection
Polyamide Films: 0.5mil, 1mil, 1.5mils, 2mils
Themobond Adhesive: Polyamide/Polyester
Copper Foils(RA or ED): ED: 1/2 Oz, 1 Oz, 2 Oz or RA: 1/2 Oz, 1 Oz, 2 Oz
Surface Finished: Electroplate nick-gold, Chemical-plating nickel-gold, electroplate lead-in, electroplate tin unleaded. Chemical-plating tin. gushes out tin, anti-oxidant
Tape Fixing: Pressure Sensitive Adhesive(PSA)
Solder Resists: Coverlay, Photo-Imageable Resist(PIR)
Capabilities
Number of Layer: 1-2 layers
Minimum Trace and Space: 3 mil & 3 mil (1 oz copper)
Smallest Drill Size: 0.2mm
Min. Annular Ring Width: 4 mils
Total Thickness of Part: 45-300 um
PTH Wall Copper Thickness 0.025mm
Flexibility: R=7 180℃ no broken crease (single panel) at 100K times bending
Dielectric Performance: 1000V/mm
Soldering Performance: 260℃, 5s
Thermal Shack Resistance: 260℃, 5s
Peel-off strength: 1.0N/mm
Tolerance
Hole Dia. Tolerance(PTH): ±0.05mm
Hole Dia. Tolerance(NPTH): ±0.05mm
Outline Tolerance: ±0.1mm

Specification of Silicone Keypad

Durometer: 30-80 ± 5 Shore A
Tensile Strength: 55-77 Kg/cm^3
Compression Set: 11-22
Insulation Breakdown: 26 V/mm
Volume Resistivity: 3*10 to 14 power -10 to 15 power
Key Stroke: 0.60-3mm
Actuation Force: 50-350 grams
Operating Temperature: -20℃ ~ 180℃
Storage Temperature: -30℃ ~ 250℃
Contact Resistance: <200 ohms
Insulation Resistance: >100 ohms
Contact Bounce: <12 msec
Contact Rating: 30 mA@ 12V DC 0.5 sec
Dielectric Strength: >1 min. @500V RMS
Operating Life: 1 milliom

*The information & specification are for reference only

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