The product design has two touch buttons, as shown in the actual pictures in Figure 1 and Figure 2, the keycap and the PCB are connected by springs, the thickness of the keycap is 2.1mm, and the surface of the keycap is 25um UV coating. Figure 3 is a schematic diagram of the structure.
When using Makrolon® 2805 as the material of the keycap, it is found that when the finger touches the keycap lightly, the touch is not very sensitive, as shown in the attached Makrolon® 2805 specification.
When we change the material of the keycap to ESD-300EM, when the finger touches the keycap lightly, the touch will be very sensitive, as shown in the attached ESD-300EM specification.
Could you please confirm whether the keycap made of ESD-300EM can be used?