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Membrane Keyboards On the Basis Of Flexible Circuit Boards

Membrane Keyboards are realized on the flexible circuit boards on the basis of polyester film by thickness of 0.125-0.150 mm. Conductors on the flexible bottom layer are formed by two main methods.

  • Screen printing of conducting inks with graphite, nickel or silver fillers or with their combinations in the capacity of the conducting material. Circuit resistance up to 300 ohm.
  • Conductors etching of the circuit board on the lamination to the polyester or polyamide film to copper foil with the following local galvanic nickel plating of the contact areas at the places of membranes’ installation. Tactile effect on the membrane keyboards is reached at the expense of frontal plate’s film forming or at the expense of the cast-in switching metallic membranes installation.

Membrane Switches Advantage

  • Embossed Overlays (for tactile feel)

  • Mylar Dome and Metal Domes (for tactile feel)

  • UV Hard coating flat key on surface

  • EMI, RFI and ESD shielding

  • Materials of overlays: Polyester or Poly-carbonate

  • Any Shape of key

  • Transparent and Female connector attachment

  • LED Sticker

  • Multi-color, reverse side printing

  • A wide variety of textured overlays including mat gloss overlays

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Chemical Resistance of Membrane Keyboards

Chemicals: Acetone, Metyl ethyl ketone (MEK), Toluene, Dichlorotehane, Isopropyl Alcohol, Cyclohexanone, Ethyl acetate, Xylene, Sodium hydoxide( 40%), Hydrochloric Acid( conc.), Petrol, Potassium Chloride, Butyl Cellosolve

Houshold Products: Coffee, Tea, Mustard, Ketchup, Tomato juice, Grape juice, Vinegar, Milk and Milk Products, Mild Household detergents, Blood

Specifications

  • Guaranteed life expectancy
  • Conductive path resistance
  • Path width
  • Contact key resistance *
  • Insulation Resistance
  • Operation Voltage
  • Operation Current
  • Ambient Humidity
  • Operating Temperature
  • External dimensions
  • Graphic lines width
  • Distance between center of keys
  • Colors (without Restraint)
  • Number of fonts
  • Graphic Design
  • 3D Keys
  • Embossed Keys
  • EL lamp
  • LEDs
  • Distance between Connectors **

Standard Membrane Keyboards

  • 300.000.000 cycles ( U < 30V, I < 25mA )
  • ≤ 1 Ω/cm
  • 1.25 mm
  • ≤ 50,100,200,500,100 Ω
  • ≤ 10 Ω/cm
  • Max 30 V
  • Max 25 mA
  • Max 95%
  • -40°C / +70 °C
  • Max 350 x 700
  • ≥ 0.2 mm
  • ≥ 10 mm
  • RAL, PANTONE
  • Approximately 1000
  • As Requested
  • Yes*
  • No
  • 130 V / 400 Hz / 5000 h / pracy
  • Specified Colors
  • 0.1”, 1mm lub inny

Membrane Keyboard (with embossing or metal dome)

  • 5.000.000 cycles ( U < 30V, I < 25mA )
  • ≤ 1 Ω/cm
  • 1.25 mm
  • ≤ 50,100,200,500,100 Ω
  • ≤ 10 Ω/cm
  • Max 30 V
  • Max 25 mA
  • Max 95%
  • -40°C / +70 °C
  • Max 350 x 700
  • ≥ 0.2 mm
  • ≥ 12 mm
  • RAL, PANTONE
  • Approximately 1000
  • As Requested
  • Yes*
  • Yes
  • 130 V / 400 Hz / 5000 h / pracy
  • Specified Colors
  • 0.1”, 1mm lub inny

* Depending on keyboards design and costumer’s requirements.

** Connectors are not provided for paths whose raster differs from that given above

We offer the following cooperation terms


  • Orders are processed according to the following schedule: Order-Confirmation. Project design, technical documentation-negotiations (1-5 days)
    Approval
    Preparation of ready products (2-3 weeks)


  • The following documents should be submitted with the order.

    A drawing or construction draft – dimensions , tolerance.
    A circuit diagram
    Design requirements


  • The quality of our services and products matches that offers by renowned world companies.


  • Our offer also includes


  • The design of the membrane keyboards products ordered.
    Technical consultations for construction and technologies.
    Flexible dates and quantities of the delivery
    Prices dependent on the size of the order and type of  product.

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