In the choice of thin film panel materials, the material physical chemistry performance index is good, its ink is also more extensive, is the thin film switch panel commonly used materials. Prestressed concrete materials differ from sand surfaces and smooth surfaces. The reason for choosing the sand surface material is that the use of the thin film switch is mostly electronic, and the panel as the control system does not want to be disturbed by the light. The sand surface only has diffuse reflection and will not produce bright reflection, at the same time, due to the disorder of the sand surface, it has the function of hiding scratches, on the contrary, the smooth surface material does not have the above characteristics. But as a smooth material, once printed on the back, the color will be bright and bold, and requires strong decorative requirements and do not need to touch the occasion, often choose a smooth material to make the panel, or because of certain display areas, if liquid crystal display is required, it may be advantageous to select a smooth surface material. The price of this thin film material is very low, about half of that of PC material. If we choose polyvinyl chloride materials, we can reduce the cost of production. At the same time, PVC material has good ductility, can be cold-pressed processing. Smooth polyvinyl chloride are generally over 0.5 mm thick and are protected on both sides by pet paper or gummed paper. Most of them are used for decorative panels, while polyvinyl chloride are usually less than 0.3 mm thick and are usually provided with fixed length paper without rolls.Because the general performance of polycarbonate film can be replaced by polycarbonate film, so it is not suitable for plate, except in some cases, such as insulation, elasticity, solvent resistance and other films can not meet the requirements, only a few applications. The screen printing of the membrane switch panel is similar to the normal plastic film screen printing, prior to the substrate film printing. The picture and text should be printed on the back of the panel, that is printed on the non-contact surface of the panel, to electronic film switch panel on the picture and text clear wear-resistant. The text on the panel is an indicator, an instruction delivery, a statement of content. It requires a smooth screen printing edge, stroke integrity. Therefore, the text screen film should have thickness, thickness, in order to print fine button layer, so that the handwriting is clear, bold, beautiful. Diaphragm of different thickness is suitable for different occasions.