Patent ID: 7057691

Claim:
A semiconductor device, comprising: a thin film transistor including a semiconductor layer, a gate insulating layer, and a gate electrode; a first inter-layer insulating film provided above the thin film transistor; a source electrode and a piling electrode provided above the first inter-layer insulating film; a second inter-layer insulating film provided above the piling electrode; a picture element electrode provided above the second inter-layer insulating film; and an additional capacity for holding electrode charges of the picture element electrode provided between the first and second inter-layer insulating films; wherein the piling electrode electrically connects the semiconductor layer of the thin film transistor and the picture element electrode and the piling electrode extends in a direction of a thickness of said first inter-layer film, and herein the additional capacity includes a first electrode, a second electrode, and an inorganic insulating film provided between the first and second electrodes, the first electrode is the piling electrode, and the inorganic insulating film has a greater dielectric constant than at least one of the first and second inter-layer insulating films.