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

Title:

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

Document Type and Number:

WIPO Patent Application WO/2013/115616

Kind Code:

A1

Abstract:

The present invention relates to: a magnetic field shielding sheet for a digitizer which minimizes an influence on a geomagnetic sensor, shields the electromagnetic field generated from various constituent elements of a main body of a portable terminal device when preparing a digitizer function for the portable terminal device, and can simultaneously improve the sensitivity of an electronic pen; a manufacturing method thereof; and the portable terminal device using the same. The magnetic field shielding sheet of the present invention comprises: a thin magnetic sheet having at least one layer which is formed with a nano-crystalline alloy and is divided into a plurality of fine pieces by flake treatment; a protective film attached to one side of the thin magnetic sheet through a first adhesive layer; and double-sided tape attached to the other side of the thin magnetic sheet through a second adhesive layer formed on one side, wherein the thin magnetic sheet is characterized by heat-treating an amorphous ribbon formed with the nano-crystalline alloy at a temperature of 300℃ to 700℃.

Inventors:

JANG KIL JAE (KR)
LEE DONG HOON (KR)
LEE DONG KUN (KR)

Application Number:

PCT/KR2013/000870

Publication Date:

August 08, 2013

Filing Date:

February 04, 2013

Export Citation:

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Assignee:

AMOSENSE CO LTD (KR)

International Classes:

B32B27/06; H05K9/00; H04B1/38

Foreign References:

KR20080072556A	2008-08-06
KR101055488B1	2011-08-08
KR101088891B1	2011-12-07
KR101019963B1	2011-03-09
KR20110092833A	2011-08-18
KR20050037015A	2005-04-21

Other References: