A graphic overlay is a top layer of a membrane switch, which typically contains a printed design that represents the user interface. The design may include graphics, text, symbols, and other visual elements that communicate information to the user.
Graphic overlays are typically made of materials such as polyester or polycarbonate, which are durable and resistant to wear and tear. They may be printed using a variety of printing techniques, including screen printing, digital printing, and lithographic printing, depending on the complexity of the design and the materials used.
In addition to providing a visual interface for the user, graphic overlays also protect the underlying layers of the membrane switch from damage and provide a barrier against moisture, dust, and other contaminants. They may be designed to be chemically resistant, UV resistant, or weather resistant, depending on the application.
Graphic overlays are commonly used in a wide variety of applications, including consumer electronics, medical devices, automotive controls, and industrial equipment. They may be customized to meet the specific requirements of a particular application, including size, shape, color, and design.