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Magnetic sheet, electronic device using same, and method for manufacturing magnetic sheet

A manufacturing method and magnetic sheet technology, which is applied in the field of magnetic sheets, can solve the problems of large azimuth information errors and inability to obtain accurate directions, and achieve the effect of suppressing azimuth errors and accurate azimuth information

Active Publication Date: 2015-11-18
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it can be determined that if the electronic compass is placed close to the magnetic member, the error of its azimuth information will become larger, resulting in the inability to obtain an accurate direction

Method used

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  • Magnetic sheet, electronic device using same, and method for manufacturing magnetic sheet
  • Magnetic sheet, electronic device using same, and method for manufacturing magnetic sheet
  • Magnetic sheet, electronic device using same, and method for manufacturing magnetic sheet

Examples

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Embodiment

[0093] A long strip of PET film with a thickness of 25 μm is used as the base material, and an aluminum foil with a thickness of 30 μm is pasted on one side of the surface with a double-sided tape with a thickness of 3 μm, and an adhesive layer with a thickness of 20 μm is placed on the opposite side. Paste the sheet-shaped magnetic body. In addition, in order to allow the substrate and the like to be attached to the object to be attached, a double-sided adhesive tape integrally formed with an adhesive layer and a release liner is attached to the side of the sheet-shaped magnetic body that is not covered by the PET film. Then, the long laminated body was cut into the rectangle of 140 mm x 230 mm x 0.13 mm, and the magnetic sheet was produced. In addition, the cracking process was not given to the magnetic sheet, and the thin-plate-shaped magnetic body was made into the non-cracked state.

[0094] As the thin-plate-shaped magnetic body for the above-mentioned magnetic sheet, F...

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Abstract

A magnetic sheet in which a thin sheet-shaped magnetic body comprising an iron-group-metal magnetic material is held by a resin film with a pressure-sensitive adhesive layer interposed therebetween. By itself, the thin sheet-shaped magnetic body is between 15 and 35 µm thick, inclusive, and the AC relative permeability (µr) of the thin sheet-shaped magnetic body at a frequency of 500 kHz is between 220 and 770, inclusive.

Description

technical field [0001] The present invention relates to a magnetic sheet, an electronic device using the magnetic sheet, and a manufacturing method of the magnetic sheet, and the magnetic sheet is applied to an electronic device equipped with an electronic compass including a geomagnetic sensor, such as a cellular phone. Background technique [0002] In recent years, electronic devices such as smartphones, tablet-type information terminals, and mobile phones have rapidly spread. Figure 11 This is a perspective view of the appearance of an electronic device such as a smartphone. The electronic device 200 is provided with various functions other than the call function. As one of these functions, there is, for example, a map display function using GPS. The user can obtain accurate location information on the display 300 of the electronic device through the map information stored in the hard disk or integrated circuit memory (IC memory) and the map display function using GPS s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/16G01C17/38H01F1/00H05K9/00
CPCH01F1/16H01F1/14775H01F10/142H01F27/36H01F27/366G01C17/28H01F10/14H01F10/26
Inventor 渡边光弘三木裕彦中村真贵
Owner HITACHI METALS LTD
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