A semiconductor device used as an ID chip is provided, of which operation
is terminated when its role is finished or expires. According to the
invention, an antenna circuit, a voltage detecting circuit, a current
amplifier circuit, a signal processing circuit, and a fuse are provided
over an insulating substrate. When large power is applied to the antenna
circuit, a voltage is detected by voltage detecting circuit and a
corresponding current is amplified by the current amplifier circuit,
thereby the fuse is melted down. Also, when an anti-fuse is used, the
anti-fuse can short an insulating film by applying an excessive voltage.
In this manner, the semiconductor device has a function for making it
invalid by stopping operation of the signal processing circuit when the
role of the device is finished or expires.