2002-246828 is referenced by 58 patents.

PROBLEM TO BE SOLVED: To prevent the characteristics of the antenna of a transponder from being deteriorated even when this transponder is placed in a relatively high temperature atmosphere, and to surely operate the transponder even when an article on which the transponder is mounted is made of any material.SOLUTION: An electromagnetic masking shield plate 13 is formed by spreading soft magnetic powder or soft magnetic flake in heat-resistant plastic, and a coil 14 formed on the surface of the electromagnetic masking shield plate 13 is spirally formed with an axial line orthogonal crossing the electromagnetic masking shield plate 13 as a center. An IC chip 16 mounted on the surface of the electromagnetic masking shield plate 13 is electrically connected to the coil 14, and specific information different for each mounting article 12 is stored in the IC chip 16. The heat-resistant plastic is provided with heat resistance to its softness or deterioration in a heating atmosphere which is at least 200°C, and the electric resistivity of the electromagnetic masking shield plate 13 is set so as to be not less than 1×106 Ωcm.

Title
Antenna for transponder
Application Number
2001-038615
Publication Number
2002-246828
Application Date
February 15, 2001
Publication Date
August 30, 2002
Inventor
Ishiyama Koichi
Nakazato Minoru
Takahashi Eiji
Soe Takeshi
Assignee
Mitsubishi Materials
IPC
H05K 09/00
H01Q 01/40
H01Q 01/38
H01Q 01/24
G06K 19/077
G06K 19/07
H01Q 07/00