Membrane switches are thin and flexible electronic switches that have a similar function to electric switches . They are typically low-voltage and are continually replacing the older push-button types of switches. A membrane switch works by permitting the momentary opening and closing of a circuit. Activation of the circuit is accomplished by touching the preferred keypad button on the device that uses membrane switches. This causes the switch contacts to connect and permit continuity and current flow. The connection or circuit is broken as soon as the finger is released, making it a momentary switch.
There are two main types of membrane switches: tactile and non-tactile switches. Tactile switches basically include all switches that have a metal dome or a polydome to achieve the "snap" action that is created by pressing. Non-tactile switches are all those that do not have these domes underneath the top layers. Membrane switches have many layers. The top layer, the graphic overlay, is the decorative layer that shows the visual functions of the membrane switch.
There are two main types of membrane switches: tactile and non-tactile switches. Tactile switches basically include all switches that have a metal dome or a polydome to achieve the "snap" action that is created by pressing. Non-tactile switches are all those that do not have these domes underneath the top layers. Membrane switches have many layers. The top layer, the graphic overlay, is the decorative layer that shows the visual functions of the membrane switch.
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Last Updated: June 16, 2007
Last Updated: June 16, 2007
What are Membrane Switches?
After that is the membrane layer, which carries one of the poles of the switch or a conductive shorting pad. Next is the tactile layer which has the domes in tactile switches, the static layer that has one or more poles of the switch and then the rigid backer which is attached to the instrument housing. Despite these layers, membrane switches are very thin.
Membrane switches are used in many different applications in industrial and commercial fields. Everyday items like ATM keypads, cell phones, computer keyboards, organizers, gasoline pump keypads and microwave ovens use these switches. In industrial settings, membrane switches are integrated into numerous devices, like control panels, numerical keypads and graphical keypads. Examples of the wide variety of industries that membrane switches are used in include medical, toys, gaming, aviation, boating, banking, test equipment, appliances, computers and printers and public information panels.
Membrane switches have many advantages over other switches. They are thin and compact, have a low cost, are versatile and durable, user friendly and are moisture and dirt resistant. Additionally, they come in many visually-pleasing styles and colors suitable for any need. However, one of the most common problems associated with membrane switches is inadequate sealing, which causes malfunction when contaminants like moisture, chemicals and extreme temperatures interfere. Because of this, it is important to have good water- and air-tight seals on membrane switches to ensure accurate performance. Some membrane switches have such good seals that they are even able to operate underwater, which increases the number of available applications for them.
Membrane switches are used in many different applications in industrial and commercial fields. Everyday items like ATM keypads, cell phones, computer keyboards, organizers, gasoline pump keypads and microwave ovens use these switches. In industrial settings, membrane switches are integrated into numerous devices, like control panels, numerical keypads and graphical keypads. Examples of the wide variety of industries that membrane switches are used in include medical, toys, gaming, aviation, boating, banking, test equipment, appliances, computers and printers and public information panels.
Membrane switches have many advantages over other switches. They are thin and compact, have a low cost, are versatile and durable, user friendly and are moisture and dirt resistant. Additionally, they come in many visually-pleasing styles and colors suitable for any need. However, one of the most common problems associated with membrane switches is inadequate sealing, which causes malfunction when contaminants like moisture, chemicals and extreme temperatures interfere. Because of this, it is important to have good water- and air-tight seals on membrane switches to ensure accurate performance. Some membrane switches have such good seals that they are even able to operate underwater, which increases the number of available applications for them.
