Semiconductor device with organic compound layer

A semiconductor device comprising:

• first and second semiconductor layers each comprising a source, a drain, and a channel region;
• a third semiconductor layer;
• a gate insulating film over the first, second, and third semiconductor layers;
• a source wiring and a current supply line over the gate insulating film;
• first and second gate electrodes over the gate insulating film, and overlapping channel regions of the first and second semiconductor layers through the gate insulating film, respectively;
• an insulating film over the source wiring, the current supply line, the first gate electrode, and the second gate electrode;
• plural connection wirings and a first electrode over the insulating film;
• an organic compound layer over the first electrode;
• and
• a second electrode formed over the organic compound layer,
• wherein the current supply line has a first width portion and a second width portion wider than the first width portion,
• wherein the third semiconductor layer and the second width portion of the current supply line overlap each other so that a capacitor is formed,
• the plural connection wirings are formed in opening portions formed in the insulating film and in the gate insulating film, and establish electrical connections between the source wiring and the source of the first semiconductor layer, between the drain of the first semiconductor layer and the second gate electrode, and between the current supply line and the source of the second semiconductor layer,
• wherein the first electrode is electrically-connected with the drain of the second semiconductor layer, and
• wherein the connection wirings and the first electrode are formed of the same material on the same film deposition surface.