Rubber Membrane Switch is Ideal for harsh environments

24 Aug, 2022

By hqt

What is a rubber membrane switch?

Electrical switches with a human interface to control machinery and equipment are called membrane switches, membrane panels, or membrane keypads.

The Membrane Switch Construction:

They can make membrane switches to order in various ways, and a typical switch has 4–6 layers to work effectively. The layers consist of.

  • Graphic or Presentation Layer:

The top layer of a membrane switch, sometimes referred to as a graphic interface, enables visual communication between the user and the machine.

  • Adhesive or Sticky Layers:

Adhesive glue is often used in 5 layers to bind the component together.

  • Spacer/Separation Layer:

Polyester is frequently used to create this layer.
This layer establishes a gap between the top and lower circuits in a non-tactile switch so that they can close and make contact when the user presses down.
This layer of a tactile switch features a metal dome that is positioned in the area. Without a spacer layer, the dome would be pre-actuated and lack a satisfying “snap.”

  • Circuit Layer:

A circuit is necessary to transfer electricity (electron) from one location to another. As a result, this layer enables the transmission of orders to the machine. To do this, a circuit, normally composed of polyester, is printed with conductive silver ink.
This layer may occasionally contain surface-mount components like resistors and LEDs.

Standards for Membrane Switch Indicator Lights: 

When it comes to indicator lights on rubber membrane switch and printed circuit board assemblies, there are a variety of different standards (PCBA). Here are a few common colour descriptors.

  • Red indicates that something is turned off or closed.

  • Green: open or on

  • Yellow: beginning or transitional

Additionally, the lights could flash, normally denoting a change in condition.
Another crucial factor is the location of the indicator lights. They are often offset from the key on a membrane switch to provide tactile sensation. Using a metal dome behind the graphic layer produces the tactile sense. Metal, of course, does not transmit light, but there are metal domes with an open core where an LED may radiate light. This is a possibility. However, they cost more than regular domes.
Light guide film technology (LGF) is the optimum option for lighting the full key for indication. With LGF, the LED produces light across the switch’s plane in a horizontal direction, and various depths that have been laser carved in the plane catch the light. LGF could be wise for keypads that must be illuminated in low-light conditions.

The design of a rubber membrane:

  • The rubber membrane switch keypads are made up of several foil layers. The exterior, which is constructed of polyester or polycarbonate, is intended to shield the inside from outside influences.

  • Since the impression of the symbols, characters, or numbers is on the inside, heavy use will not cause harm to it. The polyester foil contact bears the impression of the tracks and contact pads.

  • Depending on the design, the signal flow after pressing the key is caused by contact between the printed layers of foil or a metal element and the foil; at that point, the system is galvanically shorted. Using spacer foils and adhesive-coat fixing, the separate layers are joined together.

The layout of the rubber membrane’s buttons:

The rubber membrane keypad’s letters are positioned consistently, while can move control buttons  around, have varying sizes, or even be missing entirely. Remember where the keys were on the previous keypad and select comparable ones. Consequently, you won’t need to relearn anything or become anxious due to the strange layout.
You need to pay attention to the separation between the buttons separately. They will type more often with errors if they are close. Additionally, there is a significant chance of pushing two keys simultaneously.

A digital block is present on the rubber membrane keypad.

  • Working with numbers and words is more comfortable when using a numeric keypad. They can ignore digital blocks if the computer is frequently used for web browsing or as a multimedia center.

  • You may always purchase the numeric keypad separately if you truly like the keyboard without one. But doing so will be more expensive and require a different port.

How membrane do switches function?

Image for information on rubber membrane switches. Typically, a membrane switch operates by maintaining an open circuit through the conductive inks of the bottom circuitry. The full circuit contacts the bottom open circuit when an operator presses a button, briefly shorting it. The brief instructs the device to take the requested action.

Strength of rubber membrane switches:

  • Resistance to moisture and weather:

Membrane switches provide excellent weather and moisture resistance. Mechanical switches, on the other hand, typically suffer harm when exposed to dampness. The top layer of waterproof material that covers all the keys is how membrane switches are made. Moisture cannot, therefore, enter the underlying circuitry. Consider using a membrane switch if you want to use the switch outdoors or in other locations where moisture is an issue.

  • Tactile Feedback:

Membrane switches can give audible, tactile feedback to lower the possibility of typing and input mistakes, even though they normally produce less tactile feedback than mechanical switches. Typically, tactile feedback is produced by embedding a membrane switch’s top layer or placing snap dome keys beneath the top layer. Both approaches are quite good at providing tactile feedback.

  • Reliability:

Rubber membrane switch are quite trustworthy. A membrane switch can frequently withstand hundreds of thousands of touches. This is due to their usage of a top layer, a bottom layer, and a middle spacer layer in a straightforward yet efficient design. The membrane switch can distinguish a key press by forcing the top layer into the bottom layer when a key is pressed.


Rubber Membrane Switch is an electronic device that protects the body from harmful electromagnetic radiation. It has been used by many people who have experienced negative effects from cell phones. We have an excellent track record of providing top-notch products for our customers. With many years of experience, we know what it takes to create durable, reliable rubber membrane keypads. Please visit our website NICEONE today for more information on rubber membrane keypads. 


Write to Us And We Would Be Happy to Advise You.

    l have read and understood the privacy policy

    Do you have any questions, or would you like to speak directly with a representative?