| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a circuit substrate that allows accurately matching the impedance between an antenna coil and an electronic component electrically connected to the antenna coil.SOLUTION: A circuit substrate includes: a first substrate portion and a second substrate portion composed of an insulator layer of a flexible material; an antenna coil constituted from a coil conductor provided on the insulator layer in the first substrate portion; a wiring conductor provided on the insulator layer in the second substrate portion and electrically connected to the antenna coil; and a magnetic material layer. The first substrate portion and the second substrate portion are arranged so as to have opposite portions to each other. The magnetic material layer is provided in the first substrate portion, and is arranged between the coil conductor of the first substrate portion and the wiring conductor of the second substrate portion.</p> |
