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Thin-film panel switches classified by structure: 1. Flat, non-tactile type: Long lifespan but lacks tactile feedback. 2. Film-embossed tactile type: Offers excellent tactile feel but has a relatively shorter service life.
2022-12-02
Introduction to Specific Types of Membrane Panel Switches Flexible Membrane The flexible membrane panel switch is a typical form of membrane switch. It is referred to as "flexible" because its key components—the mask layer, isolation layer, and circuit layer—are all constructed from flexible films with distinct properties. In the circuit layer of the soft film switch, an electrically high-performance PET film serves as the substrate for the switch's circuit pattern. This layer also incorporates tactile feel domes and connects both the upper and lower circuit layers.
The keys on the membrane panel switches are typically indicated by color to denote their position, shape, and size. Consequently, operators must rely solely on visual inspection to ensure operational accuracy, as there is no feedback mechanism available. This lack of feedback can undermine confidence in machine monitoring and slow down operational efficiency. Therefore, during the panel design phase, careful layout planning is essential, including the provision of process holes that allow precise positioning during molding. Additionally, the height of any three-dimensional protrusions should generally not exceed twice the thickness of the substrate material.
The medical device membrane switch is a multi-layered (planar) non-locking key switch constructed from an insulating material layer with inherent elasticity. It integrates the functions of a button, indicator element, and dashboard into a single unit. Its operation relies entirely on the elastic deformation of the flexible membrane in the vertical direction.
The material thickness of the IP68-rated, waterproof membrane switch. Plastic substrates with a thickness of 0.25 mm or less are classified as films and are primarily used as the panel layer in membrane switches. The backside of these films is printed with various indicative patterns and text to clearly mark the operational areas corresponding to each key position. When selecting the appropriate film thickness, consideration should be given to both the size of the panel and the dimensions of the individual keys.