| 摘要 |
PROBLEM TO BE SOLVED: To provide an ID tag for being mounted on metal which is easily assembled and has enhanced productivity while made to be thin and small. SOLUTION: An antenna coil 16 is wound around the core part 15a of a magnetic core 15. The core part 15a is cylindrical formed, and in the core part 15a, a recessed part 15b for housing a control circuit 17 is formed at a bottom face part, and a flange part 15c and an erecting part are provided. A slit 18 is formed so as to notch the flange part 15c radially from the center of the core part 15a so as not to prevent a magnetic flux. The control circuit 17, while being connected to the antenna coil 16, can be easily attached to the recessed part 15b through the slit 18. The magnetic core 15 is housed in a plastic case 13 and sealed with resin. The magnetic flux from the coil 12a of a reader/writer is efficiently led to the antenna coil 16 by the magnetic core 15, and the ID tag can be made to be thin and small. |
