Membrane switch is composed of multi-layer film, different material properties, play a different role in the completion of membrane switch in the electrical products on the function, which is the circuit layer is the main function layer, it is in accordance with the circuit product requirements. The function of the design of electronic circuits.
Membrane switch, also known as touch-type keyboard, the use of plane multi-layer combination of the overall structure of the seal is the key switch, panel, marking, symbol display and liner sealed together optical, mechanical and electrical integration New electronic components, electronic products, the appearance of fundamental changes in the structure, it can replace the conventional discrete components of the keys, more reliable implementation of the task of the operating system.
The most common problems in the design of membrane switch circuits are as follows:
1.The film switch drum package button shrapnel need to be placed properly, there can not be offset, otherwise it will affect the operation of the key to failure.
2.Color problem: the proportion of ink modulation, color deviation is caused by the main reason for serious, there is too strict for color requirements, the color range is too small, these factors are no matter what industry is more difficult to control the problem.
3.Embosses buttons should choose the correct area position to ensure the beauty of surface, backer adhesive doesn’t work well,In addition to the choice of raw materials, but also to confirm the shape of a good prototype, if the prototype include groove, it must choose good quality adhesive, backer adhesive just okay.