Application of amorphous ribbon in electromagnetic touch screen

The sensor of electronic products needs to be underlaid with a metal sheet as a magnetic shielding material. From the 1980s to the present, the shielding materials used on such devices have undergone the evolution of aluminum (or copper) sheet - ordinary silicon steel sheet - high permeability silicon steel sheet (Si content between 4 and 7%) - amorphous ribbon and low permeability sheet. Because the thickness of amorphous alloy ribbon is too thin, it cannot be used as a shielding material alone, but it is used with low permeability aluminum foil. Things flow from finger to finger.