MAGNETIC FIELD SHIELDING SHEET FOR DIGITIZER, METHOD FOR MANUFACTURING SAME, AND PORTABLE TERMINAL DEVICE USING SAME

摘要

The present invention relates to a magnetic field shielding sheet for a digitizer that is capable of minimizing effects on a terrestrial magnetism sensor, providing shielding for a magnetic field that is generated from various components in a main body of a portable terminal device when the portable terminal device is provided with a digitizer function, and improving the sensitivity of the digitizer function, a method for manufacturing same, and a portable terminal device using same. The magnetic field shielding sheet according to the present invention includes: an at least one-layered thin plate magnetic sheet that is formed of an Fe-based amorphous alloy and flake-treated to be divided into multiple fine fragments; a protective film that is bonded to one side surface of the thin plate magnetic sheet by using a first bonding layer; and a double-sided tape that is bonded to the other side surface of the thin film magnetic sheet by using a second bonding layer provided on the one side surface, the thin plate magnetic sheet being an amorphous ribbon sheet formed of an Fe-based amorphous alloy which is heat-treated between 300°C and 480°C.