Membrane switch is fastly 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 switches. Polyester sheets has the softening temperature of 200°C and melting temperature of 250°C.