Patent ID: 7608877

Claim:
A circuit device having a field effect transistor and a capacitor, wherein the capacitor is connected to at least one of a gate electrode, a source electrode and a drain electrode of the field effect transistor, the field effect transistor has a channel comprised of a nano-wire, the capacitor comprises a capacitor core electrode comprised of a first electrode, the first electrode comprised of the nano-wire, a dielectric layer partly covering a peripheral face of the first electrode and a second electrode covering a peripheral face of the dielectric layer, and the composition of the nano-wire is changed between the transistor portion and capacitor portion, wherein the electro-conductivity of the nano-wire is made higher at the portion corresponding to the capacitor core electrode than at the portion corresponding to the transistor channel, and a display element is connected to the source electrode or the drain electrode of the field effect transistor of the circuit device.