Membrane Key Boards

A membrane key boards has two Screen printed polyester films with conductive ink to form the circuit layers of the keyboard. In between two circuits a die cut spacer at contact points is then sandwiched. To complete the circuits a touch of finger on the die-cut holes allows to close the contact. Up on release the circuit is broken. In put device user identifies the specific keyboard contacts through a graphic overlay. For interfacing with the customer's electronics the panel back is laminated with an adhesive for mounting to a backer or enclosure and can be terminated to a Male/ Female clincher connector.
Membrane switch is rapidly outdating the present type of the electronic switches i.e. micro switch, push button switches, silicon rubber keypads etc. It is gaining widespread popularity and use because of its various characteristics. It is dust-proof, humidity proof; heat proof (can work even at 100 ?C and -10?C). This is so because the membrane switches are completely sealed and polyester sheets are used to manufacture the membrane keyboard. Polyester sheets have the softening temperature of 125?C and melting temperature of 250?C. Membrane switches have contact life of more than 5 million contacts for non-tactile and more than 2 million contacts for the tactile type. It also ensures minimum mechanical movement, which means minimum chances of switch failure. It is economical and gives outstanding appearance.