In the human-computer interaction interface development process of a kind of technology called membrane keyboards on many occasions to replace the touch buttons. Film button can according to the requirement of the user to embed the multiple metal contact is composed of several layers of thin film membrane panel, and adopt the method of printing metal wires and metal by a FPC connection terminals of the contacts with the outside. Membrane keyboards feel small. Can realize multiple keys at the same time. At the same time in the beautiful simplifies and plate machine design. In addition, it also have certain waterproof performance. And was welcomed by many customers. But as a result of thin-film button need to customize. Its complicated craftsmanship. Lead to its high cost. At the same time. Its mechanical contact limiting factors such as life. Make it application has also been a certain limit.