A waterproof insulating layer is coated on the surface of the conductive circuit so that the conductive circuit does not directly contact the pressure-sensitive adhesive layer, including the release paper layer and the bottom adhesive layer that are sequentially adhered from bottom to top: LED circuit layer, LED key sheet layer, button circuit layer, line key layer, fixed layer, fixed adhesive layer, LGF backlight film layer, surface key layer, panel layer, and LED between the LED circuit layer and fixed adhesive layer.