Patent ID: 7699232

Claim:
A semiconductor device comprising: a modulating circuit formed over an insulating substrate; a demodulating circuit formed over the insulating substrate; a logic circuit formed over the insulating substrate wherein the demodulating circuit is operationally connected to the logic circuit; a fuse memory circuit formed over the insulating substrate and comprising a thin film transistor and a fuse element wherein the fuse memory circuit has a function of storing an output signal of the logic circuit; and an antenna circuit, wherein the modulating circuit and the demodulating circuit are electrically connected to the antenna circuit, wherein the logic circuit comprises a switch and a volatile memory circuit, wherein a writing state storage bit is stored in the volatile memory circuit, wherein the logic circuit controls whether writing of the fuse memory circuit is possible or not by turning on/off the switch depending on data stored in the writing state storage bit, and wherein at least one of the modulating circuit, the demodulating circuit, and the logic circuit comprises a thin film transistor formed over the insulating substrate.