| 摘要 |
<p>To improve electronic part packaging efficiency without sacrificing the transmission distance of a radio IC tag, a recess is formed in the front side surface of a printed wiring board. An IC chip is placed in the recess so that the IC chip does not protrude from the front side surface, a first major surface la and a second major surface of the printed wiring board. Antenna elements of an antenna are formed on the front side surface on the opposite sides, respectively, of the IC chip, and the antenna is connected to the IC chip. The antenna is a dipole antenna of a length equal to half the wavelength of radio waves to be radiated by the antenna.</p> |
