| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio IC device on which a radio IC chip can be easily and accurately mounted and in which the resonance frequency characteristic is not changed. <P>SOLUTION: The radio IC device includes: a radio IC chip 5; a feed circuit substrate 10 having the radio IC chip 5 mounted thereon and a built-in feed circuit 16 connected to the radio IC chip 5 via a solder bump 6; and an emission plate 20 attached to the lower surface of the feed circuit substrate 10 and electromagnetically coupled to the feed circuit 16. The feed circuit substrate 10 is formed by overlaying flexible sheets and the feed circuit 16 is formed by an LC resonance circuit having an inductance element L and a capacitance element C. <P>COPYRIGHT: (C)2008,JPO&INPIT |
