Patent ID: 7224032

Claim:
An electronic device, comprising: a signal supplying section; a signal receiving section; a first switching element for switching an electrical connection between the signal supplying section and the signal receiving section; and a second switching element as a spare, wherein the second switching element includes a semiconductor film and a gate electrode, the semiconductor film including a source electrode and a drain electrode, the gate electrode being provided on the semiconductor film with a gate insulation film interposed therebetween, the electronic device includes an interlayer insulation film between the signal supplying section and the semiconductor film of the second switching element, the interlayer insulation film being thicker than the gate insulation film, the signal supplying section is electrically connectable to the source electrode of the semiconductor film by forming a contact hole in the interlayer insulation film, the electronic device includes an interlayer insulation film between the signal receiving section and the semiconductor film of the second switching element, the interlayer insulation film being thicker than the gate insulation film, the signal receiving section is electrically connectable to the drain electrode of the semiconductor film by forming a contact hole in the interlayer insulation film, and when the first switching element is unusable, the electrical connection between the signal supplying section and the signal receiving section is rendered switchable by the second switching element by forming a contact hole in the interlayer insulation film.