Magnetic field shielding sheet for digitizer, manufacturing method thereof, and portable terminal device using same
US9507390B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2013 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Oct 5, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/838
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is a magnetic field shield sheet for a digitizer, which blocks an effect of a magnetic field generated from various components of a main body of the portable terminal device and at the same time improves the sensitivity of an electronic pen when a digitizer feature is implemented in the portable terminal device, while minimizing an influence upon a geomagnetic sensor. The magnetic field shield sheet includes: at least one layer thin magnetic sheet made of a nanocrystalline alloy and 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 on one side of the protective film; and a double-sided tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided on one side of the double-sided adhesive tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.