Important properties of membrane touch switch

24 Aug, 2022

By hqt

What is meant by membrane touch switch?

  • Touch switches or membrane switches are other names for membrane touch switches. A membrane touch switch is often an electrical momentary on/off switch for turning on and off a circuit. Because they function in generally open, push to shut, and immediate opening situations, these switches are regarded to have transitory action. To close the circuit, the switch’s two poles must make direct contact, pressing the switch with an actuator or a finger. The poles quickly detach, and the switch returns to its initial open position when the touch button is released.

  • A membrane touch switch is a switch that shuts off an electrical circuit by touching a thin, flexible membrane. The circuit is finished, and the current can flow when the membrane is squeezed. The switch, which is frequently found on computer keyboards and other electronic devices, can be used to regulate electrical circuits. 

  • Typically, silicone, PVC, or other flexible materials create the membrane. A membrane touch switch is utilized in electrical circuits as a mechanical switch or contactor. It comprises two membranes spaced apart by a tiny air gap. 

Working of membrane touch switches:

The membrane touch switch is a type of switch that shuts off an electrical circuit by applying pressure to an adhesive layer. The circuit is complete, and the current can flow when the glue is pressed. The membrane may be constructed from various substances, including polyester, polycarbonate, and metal foil. A circuit is completed when a membrane touch switch is activated, sending a signal to the object it controls. A signal is sent to the device. A membrane touch switch is controlled when you complete a circuit by pressing it. The capacitive touch switch is the most popular kind of membrane touch switch.

  • An upper layer of conductive material called the membrane.

  • a middle layer of insulating material called the dielectric.

  • A lower layer of conductive material.

These layers make up the switch’s typical three layers. 

Design overlay of membrane touch switch:

Printing silver or carbon ink onto heat-stabilized polymer material produces membrane touch switches. The switch’s first surface receives an overlay as the graphic user interface. These top substrates are called “membranes” or “graphic overlay films” since they are constructed from thin, malleable materials. They are employed in various sectors, including consumer markets, medical applications, and aerospace. Systems for industrial control may also employ them. Membrane touch switches are frequently found in phone handsets, computer keyboards, touch-sensitive toys, and appliance switches. Because they improve the aesthetics of human-machine interfaces while being less expensive and durable than other types of switches, membrane touch switches are increasingly common in manufacturing and engineering.

What purpose does a membrane switch serve?

Benefits of membrane switches include their low profile, sealing prowess, and simplicity of cleaning. Membrane switches can be used with various control systems like touch screens, keyboards, and lighting. They can also be intricate, like membrane keyboards and switch panels in computers and mobile devices. These types of switches have been around since the early days of technology, but they’ve seen a resurgence recently. This touch switch is a common term in electronics that refers to a switch with a membrane covering its contact points. They work based on capacitance and are also known as membrane switches. 

Important Characteristics of Membrane Touch Switches:

The production of these touch switches can be done with several materials. These materials impact the characteristics of the touch switch. Because of its endurance and high-temperature capabilities, polyester is widely utilized as the film for creating membrane touch switches, for instance. Hard-coated polyester films are an additional choice when building membrane touch switches because they may be created specifically for the graphical overlay layer on membrane switches. Key characteristics of touch switches often include:

  • increased conductivity

  • Dexterity

  • Carbon and silver conductors

  • Strong stickiness

  • Rapid cure

  • Dependable

What are the plus points of the membrane touch switch?

  • Minimal Profile:

Membrane switches have a lower profile than other electrical switches because they are built with printed circuits and a flexible substrate. Their small, slender shape enables manufacturers to utilize Tactile Responses.

  • Tactile responses:

Tactile feedback can be designed into membrane switches. Of course, when we talk about tactile feedback, we’re talking about the physical sensation produced when a user activates an electrical switch or another device. Membrane switches that deform when pressed and snap back into place when released can use snap-style domes to produce tactile feedback. Them in remote controls, appliance buttons, and other low-profile design-required applications.

  • Backlit display:

Membrane switches frequently install backlighting to enhance functionality by illuminating knobs and keys. Electroluminescent backlighting is one of the various backlighting types offered for membrane switches (EL). EL bulbs can illuminate the front of a membrane switch by using colored phosphor compounds. LEDs are a different kind of backlighting for membrane switches (LED). LED bulbs have a longer lifespan and use less energy than EL bulbs. The possibility of producing bright spots is the only drawback of employing LED backlighting in membrane switches.


Membrane touch switch include advantages such as low profile, excellent sealing, and ease of cleaning. They can use it with various control mechanisms, including touch screens, keyboards, and lighting. NICEONE  has been manufacturing keypads for many years. We have extensive experience in designing and developing membrane switches for various applications. Our membrane switches are used in many industries such as medical devices, automotive, and the military. Our high-quality products and excellent service have established a steady relationship with many customers from different countries. They are commonly found in hospitals, clinics, labs, and other healthcare facilities and are used in industrial and commercial environments where they are exposed to extreme conditions. These switches provide reliable operation under harsh environmental conditions. Buy yours today!


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