What are FPC circuit membrane keyboards
Time of issue：
FPC circuit membrane keyboards is an operating system that integrates key functions, indicator elements, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer, and lower circuit. When the membrane switch is pressed, the contact of the upper circuit deforms downward, and it is in contact with the plate of the lower circuit. After the finger is released, the contact of the upper circuit bounces back, the circuit is disconnected, and the circuit triggers a signal. FPC circuit membrane keyboards have rigorous structure, beautiful appearance and good airtightness. It has the characteristics of moisture resistance and long service life. It is widely used in electronic communication, electronic measuring instruments, industrial control, medical equipment, automobile industry, smart toys, household appliances and other fields.
FPC circuit membrane keyboards, also known as touch keyboards, are made of soft materials such as FPC and double-sided tape, using screen printing technology to produce a multi-plane combined sealed set of graphics, buttons, symbol display, conductive and electronic switches Plastic electronic products with functions in one.
The materials used in FPC circuits are insulating films, adhesives and conductors. The insulating film forms the base layer of the circuit, and the adhesive bonds the copper foil to the insulating layer. In a multi-layer design, it is then bonded to the inner layer. They are also used as a protective cover to insulate the circuit from dust and moisture and to reduce stress during flexing. The copper foil forms a conductive layer.
In some FPC circuit membrane keyboards, rigid members formed of aluminum or stainless steel are used, which can provide dimensional stability, provide physical support for the placement of components and wires, and release stress. The adhesive bonds the rigid component and the flexible circuit together. In addition, another material is sometimes used in FPC circuit membrane keyboards. It is the adhesive layer, which is formed by coating the two sides of the insulating film with adhesive. The adhesive layer provides environmental protection and electrical insulation functions, and can eliminate a layer of film, and has the ability to bond multiple layers with a small number of layers.