Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MAGNETIC SHEET, ANTENNA DEVICE, AND METHOD FOR MANUFACTURING ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/018211
Kind Code:
A1
Abstract:
This invention provides an antenna device that can realize high rigidity while using a fragile ferrite sinter and can realize excellent communication properties. In this antenna device, an antenna module comprises a magnetic core member (20) comprising a plurality of flat-shaped ferrite sinters (21) spread so as to cover an antenna coil mounted on an antenna substrate. The ferrite sinter (21) has a size satisfying requirements of 2 < D/A, 0 < L1 < 5 Œ 21/2, and 1 ≤ L1/L2 ≤ 2 wherein D represents the thickness of the ferrite sinter (21), µm; A represents the area of a main plane, mm2; L1 represents the length of major axis, mm; and L2 represents the length of minor axis, mm.

Inventors:
ARAMAKI, Keisuke (12-3 Satsuki-cho Kanuma-sh, Tochigi 02, 3228502, JP)
荒巻 慶輔 (〒02 栃木県鹿沼市さつき町12-3 ソニーケミカル&インフォメーションデバイス株式会社 鹿沼事業所 第二工場内 Tochigi, 3228502, JP)
SUGITA, Satoru (12-3 Satsuki-cho Kanuma-sh, Tochigi 02, 3228502, JP)
杉田 悟 (〒02 栃木県鹿沼市さつき町12-3 ソニーケミカル&インフォメーションデバイス株式会社 鹿沼事業所 第二工場内 Tochigi, 3228502, JP)
Application Number:
JP2007/058232
Publication Date:
February 14, 2008
Filing Date:
April 16, 2007
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SONY CHEMICAL & INFORMATION DEVICE CORPORATION (Gate City Osaki East Tower 8F, 11-2 Osaki 1-chome, Shinagawa-k, Tokyo 32, 1410032, JP)
ソニーケミカル&インフォメーションデバイス株式会社 (〒32 東京都品川区大崎一丁目11番2号 ゲートシティ大崎イーストタワー8階 Tokyo, 1410032, JP)
ARAMAKI, Keisuke (12-3 Satsuki-cho Kanuma-sh, Tochigi 02, 3228502, JP)
荒巻 慶輔 (〒02 栃木県鹿沼市さつき町12-3 ソニーケミカル&インフォメーションデバイス株式会社 鹿沼事業所 第二工場内 Tochigi, 3228502, JP)
SUGITA, Satoru (12-3 Satsuki-cho Kanuma-sh, Tochigi 02, 3228502, JP)
International Classes:
H01Q7/06; G06K19/00; G06K19/02; H01Q7/00; H01Q7/00; G06K19/00; G06K19/02
Attorney, Agent or Firm:
SATO, Masaru (SATO AND ASSOCIATES, 3-1 Ariak, Kouto-ku Tokyo 71, 1358071, JP)
Download PDF: