Membrane Switch
Membrane switch is known as the touch panle which gather panel and switch function in one of the electronic switch.. Membrane switch Composed of three or more layers of different PET film together . has a small size, light weight, good sealing, nice appearance which  mainly used in toys, electronics instrumentation, CNC machine tools, medical equipment, communications, electronic weighing, refrigerators, washing machines, microwave ovens and other household appliances.