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Magnetic field shielding sheet for digitizer and method of manufacturing the same and portable terminal device using the same

  • US 9,392,735 B2
  • Filed: 06/04/2013
  • Issued: 07/12/2016
  • Est. Priority Date: 06/04/2012
  • Status: Active Grant
First Claim
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1. A magnetic field shielding sheet for a digitizer, the magnetic field shielding sheet comprising:

  • at least one layer thin magnetic sheet which is flake-treated so as to be separated into a plurality of fine pieces;

    a protective film that is adhered on one surface of the thin magnetic sheet via a first adhesive layer provided therebetween; and

    a double-sided adhesive tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided therebetween,wherein the thin magnetic sheet is obtained by heat treating an amorphous ribbon sheet made of a Fe-based alloy at a temperature less than a crystallization temperature.

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