MAGNETIC ISOLATION SHEET, COIL MODULE, AND ELECTRONIC DEVICE

A magnetic isolation sheet, a coil module, and an electronic device are provided. The magnetic isolation sheet is used in a coil module in a wireless charging device. The magnetic isolation sheet includes a first nanocrystalline layer. The first nanocrystalline layer includes a first region in a shape of a non-closed ring. A material of the first region is a nanocrystal on which magnetic crushing has not been performed. Because the first region is in the shape of a non-closed ring, i.e., the first region is provided with a notch penetrating the first region, through the notch, a change in magnetic flux when magnetic lines of force in a magnetic field pass through the nanocrystal can be avoided, and the heating of a nanocrystalline material during wireless charging is avoided.