Membrane Switch

Waterproof flexible membrane switches  or more precisely a standard membrane switch assembly is comprised of several flexible layers that make up a complete switch package. This assembly can have as few as one active area (key or button) to several dozen active areas. A membrane switch and panel is an interface between man and machine, which enables an operator to communicate with equipment, instrumentation, or machinery. Subsequently, this allows the operator to communicate with the device, issuing commands and/or performing other operations. The operator presses the membrane control panel when he or she wants to control the device.

Construction of Membrane Switch

Graphic Overlay – PET/PC is usually the overlay material of choice due to its fantastic chemical resistance and flex property. We are professional membrane switch company in China.Komkey offers microwave membrane keypad customized design services such as digital printing, screen-printing, or apply both methods to ensure you get the right colors, textures and finish your design requirements.

Adhesive Overlay – This adhesive layer sticks the membrane overlay to the top circuit layer, and is usually an acrylic adhesive. The material is the same as the fourth layer. Only the thickness is maybe different according to the actual situation.

Top Circuit Layer – The material of this layer is specific. It is a 0.1mm thickness thermostable PET film printed with conductive silver ink and also dielectric oil, which used for fastening metal domes.

Circuit Spacer – This layer separates the top circuit from the bottom circuit so that the touch membrane remains normally break until the membrane switch keypad is pressed. The circuit spacer is a polyester spacer with adhesive on both sides.

Lower Circuit Layer – This layer is a 0.1mm-0.25mm thickness thermostable PET film printed with conductive silver ink and also dielectric oil. This layer terminates as a flexible tail that serves as an interconnector to controller PCBs or other IC.

Rear Adhesive – This adhesive layer bonds the entire membrane switch to the product surface, housing, or to a rigid support panel. Komkey, a membrane switch keypad supplier, can use the proper adhesive type and thickness to bond your membrane switch to your equipment.    

Membrane Switch Specification

Mechanical Properties:

Life Expectancy

Flat type ≥ 5 million times,

Tactile type ≥ 1 million times

Operation Force Flat Type 57-284g ,Tactile Type 170-397g

Dome Rebound Time ≤6ms

Tail Bending Performance ≤180 °

Switch Stroke Flat 0.1~0.5mm,Tactile 0.6~1.5mm

Vibration 20G's max.

Thickness 0.7~1.5 mm

Electrical Properties:

Rated Voltage ≤50V DC

Rated Current ≤ 100mA

Operating Power ≤1W

Insulation Resistance ≥100MΩ (250V DC)

Loop Resistance

10Ω ~ 2kΩ

(Depending on the design)

Contact Resistance

0.5 ~ 5Ω

(Depending on wire length and the materials)

Wire Lead Resistance <1Ω/cm

Base Material Voltage Withstand 1500V DC

Environmental Properties:

Operation Temperature -40°C to +80°C (-40°to 176°F)

Storage Temperature -40°C to +85°C (-40°to 185°F)

Atmospheric Pressure 86 ~ 106 kPa

Humidity +40°C, 90%~95%RH for 240 Hours

Why Choose Our Membrane Switch?

Our Membrane Switch Pad Advantages

Beautiful appearance, Variety color printing.

Small size, light in weight, good tactility, Long life span.

moisture-proof, dustproof, waterproof, anti-corrosion, and erosion of harmful gases proof.

Easy to operate, intuitive, safe and reliable

Cost-effective, convenient installation

Komkey is one of the reliable membrane switches manufacturers offering custom membrane switch panel design service  

Customized specification is available, the Smaller volume can be accepted.

Customized logo/Brand/Contact way can be printed in the overlay for advertisement.

If you wan to buy membrane switch,please contact us.