Electromagnetic wave shielding sheet for antenna, method for manufacturing same, antenna comprising same, and battery pack for portable terminal having said antenna
First Claim
1. An electromagnetic wave shielding sheet for an antenna, comprising:
- a ferrite sheet;
a heat dissipating layer attached to one side of the ferrite sheet; and
an adhesive layer between the ferrite sheet and the heat-dissipating layer via which the heat-dissipating layer is attached to the ferrite sheet,wherein the adhesive layer comprises an acryl-based adhesive,wherein the adhesive contains Ag and Ni powders in an amount of 10˜
30 volume %, based on a total volume thereof, so that the adhesive can function as a thermal conductor.
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Abstract
The present invention relates to an electromagnetic wave shielding sheet for an antenna, to a method for manufacturing same, to an antenna comprising same, and to a battery pack for a portable terminal having said antenna. The method for manufacturing the electromagnetic wave shielding sheet for the antenna may reduce a frequency variation, provide a heat-dissipating function, and prevent peel-off. The method comprises: a step of preparing a ferrite sheet; and step of placing a heat-dissipating layer on one side of the ferrite sheet. The present invention has advantages in that the adhesive forces of the ferrite sheet and the heat-dissipating layer are excellent and the heat-dissipating effects are excellent, the electromagnetic wave shielding sheet can be applied to various antenna products, and the frequency variation can be reduced when the antenna having the electromagnetic wave shielding sheet is mounted on the battery pack.
9 Citations
14 Claims
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1. An electromagnetic wave shielding sheet for an antenna, comprising:
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a ferrite sheet; a heat dissipating layer attached to one side of the ferrite sheet; and an adhesive layer between the ferrite sheet and the heat-dissipating layer via which the heat-dissipating layer is attached to the ferrite sheet, wherein the adhesive layer comprises an acryl-based adhesive, wherein the adhesive contains Ag and Ni powders in an amount of 10˜
30 volume %, based on a total volume thereof, so that the adhesive can function as a thermal conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing an electromagnetic wave shielding sheet for an antenna, comprising:
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preparing a ferrite sheet; and bonding a heat-dissipating layer to one side of the ferrite sheet, wherein the bonding step comprises; forming an adhesive on one side of the ferrite sheet; and disposing the heat-dissipating layer on the adhesive, wherein the adhesive comprises an acryl-based adhesive, wherein the adhesive contains Ag and Ni powders in an amount of 10˜
30volume %, based on a total volume thereof, so that the adhesive can function as a thermal conductor. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification