Patent ID: 8123131

Claim:
An antenna-containing substrate wherein a first substrate is provided with an IC chip and an antenna, wherein the antenna is mounted on a surface of the first substrate and is connected to the IC chip, and the first substrate and a second substrate are fixed and laminated such that a reverse surface of the second substrate is opposed to the surface of the first substrate, wherein the first substrate has an opening and the IC chip is fitted in the opening, and there is provided a wiring pattern for electrically connecting the IC chip to a component to be mounted on at least one of a reverse surface of the first substrate and a surface of the second substrate, the IC chip further comprising: a power supply circuit that generates the power to be supplied to the IC chip on the basis of a radio wave signal received by the antenna, a data interface circuit that establishes data communication to and from the component to be mounted, a determination circuit that determines whether the power generated by the power supply circuit is supplied to the IC chip or the power applied through the wiring pattern is supplied to the IC chip, and a power supply control circuit that controls the supply of the power so as to continue to supply the power to the data interface circuit in response to the determination by the determination circuit that the power is supplied to the IC chip through the wiring pattern, while stopping supplying the power to the data interface circuit in response to the determination by the determination circuit that the power generated by the power supply circuit is supplied to the IC chip.