Semiconductor device and method of fabricating the same
View Patent ↗An active matrix display device having a pixel structure in which pixel electrodes, gate wirings and source wirings are suitably arranged in the pixel portions to realize a high numerical aperture without increasing the number of masks or the number of steps. The device comprises a gate electrode and a source wiring on an insulating surface, a first insulating layer on the gate electrode and on the source wiring, a semiconductor layer on the first insulating film, a second insulating layer on the semiconductor film, a gate wiring connected to the gate electrode on the second insulating layer, a connection electrode for connecting the source wiring and the semiconductor layer together; and a pixel electrode connected to the semiconductor layer.
1. A semiconductor device comprising:
a gate electrode, a first wiring and a first electrode over an insulating surface;
a first insulating film over the gate electrode, the first wiring and the first electrode;
a first semiconductor layer and a second semiconductor layer over the first insulating film; wherein the first semiconductor layer comprises a channel forming region, a first region and a second region,
a second insulating film over the first semiconductor layer and the second semiconductor layer;
a second electrode and a third electrode over the second insulating film; and
wherein the second electrode is electrically connected to the first region;
wherein the second electrode is electrically connected to the first wiring,
wherein the third electrode is electrically connected to the second region,
wherein the third electrode is electrically connected to the first electrode,
wherein the first electrode comprises a region overlapped with the second semiconductor layer to form a capacitor.
2. A semiconductor device according to claim 1 , wherein the gate electrode, the first wiring and the first electrode contain a same material.
3. A semiconductor device according to claim 1 , wherein the first insulating film and the second insulating film comprise a silicon nitride.
4. A semiconductor device comprising:
a gate electrode, a first wiring and a first electrode over an insulating surface;
a first insulating film over the gate electrode, the first wiring and the first electrode;
a first semiconductor layer and a second semiconductor layer over the first insulating film; wherein the first semiconductor layer comprises a channel forming region, a first region and a second region,
a second insulating film over the first semiconductor layer and the second semiconductor layer; and
a second electrode, a third electrode, and a second wiring over the second insulating film; and
wherein the second electrode is electrically connected to the first region,
wherein the second electrode is electrically connected to the first wiring,
wherein the third electrode is electrically connected to the third region,
wherein the third electrode is electrically connected to the first electrode,
wherein the second wiring is electrically connected to the gate electrode, and
wherein the first electrode is comprises a region overlapped with the second semiconductor layer to form a capacitor.
5. A semiconductor device according to claim 4 , wherein the gate electrode, the first wiring and the first electrode contain a same material.
6. A semiconductor device according to claim 4 , wherein the first insulating film and the second insulating film comprise a silicon nitride.
7. A semiconductor device comprising:
a first gate electrode, a first wiring, a second gate electrode and a first electrode over an insulating surface;
a first insulating film over the first gate electrode, the first wiring, the second gate electrode and the first electrode;
a first semiconductor layer, a second semiconductor layer and a third semiconductor layer over the first insulating film; wherein the first semiconductor layer comprises a first channel forming region, a first region and a second region, and the second semiconductor layer comprises a second channel forming region, a third region and a fourth region,
a second insulating film over the first semiconductor layer, the second semiconductor layer and the third semiconductor layer;
a second electrode and a third electrode over the second insulating film; and
a pixel electrode over the second insulating film;
wherein the second electrode is electrically connected to the first region,
wherein the second electrode is electrically connected to the first wiring,
wherein the third electrode is electrically connected to the second region,
wherein the third electrode is electrically connected to the second gate electrode and the first electrode,
wherein the pixel electrode is electrically connected to the fourth region, and
wherein the first electrode comprises a region overlapped with the third semiconductor layer to form a capacitor.
8. A semiconductor device according to claim 7 , wherein the first gate electrode, the first wiring, the second gate electrode and the first electrode contain a same material.
9. A semiconductor device according to claim 7 , wherein a portion of the pixel electrode is overlapped with the first wiring.
10. A semiconductor device according to claim 7 , wherein the first insulating film and the second insulating film comprise a silicon nitride.
11. A semiconductor device according to claim 7 , further comprising an organic light-emitting layer over the pixel electrode.
12. A semiconductor device according to claim 7 , wherein the third region is electrically connected to a power supply line over the second insulating film.
13. A semiconductor device according to claim 7 , wherein the first gate electrode is electrically connected to a second wiring over the second insulating film.
14. A semiconductor device comprising:
a first gate electrode, a first wiring, a second gate electrode and a first electrode over an insulating surface;
a first insulating film over the first gate electrode, the first wiring, the second gate electrode and the first electrode;
a first semiconductor layer, a second semiconductor layer and a third semiconductor layer over the first insulating film; wherein the first semiconductor layer comprises a first channel forming region, a first region and a second region, and the second semiconductor layer comprises a second channel forming region, a third region and a fourth region
a second insulating film over the first semiconductor layer, the second semiconductor layer and the third semiconductor layer;
a second electrode, a third electrode and a second wiring over the second insulating film; and
a pixel electrode over the second insulating film;
wherein the second electrode is electrically connected to the first region,
wherein the second electrode is electrically connected to the first wiring,
wherein the third electrode is electrically connected to the second region,
wherein the third electrode is electrically connected to the second gate electrode and the first electrode,
wherein the pixel electrode is electrically connected to the fourth region,
wherein the second wiring is electrically connected to the first gate electrode, and
wherein the first electrode comprises a region overlapped with the third semiconductor layer to form a capacitor.
15. A semiconductor device according to claim 14 , wherein the first gate electrode, the first wiring, the second gate electrode and the first electrode contain a same material.
16. A semiconductor device according to claim 14 , wherein a portion of the pixel electrode is overlapped with the first wiring.
17. A semiconductor device according to claim 14 , wherein the first insulating film and the second insulating film comprise a silicon nitride.
18. A semiconductor device according to claim 14 , wherein the second electrode comprises a semiconductor layer.
19. A semiconductor device according to claim 14 , further comprising an organic light-emitting layer over the pixel electrode.
20. A semiconductor device according to claim 14 , wherein the second region is electrically connected to a power supply line over the second insulating film.
21. A semiconductor device comprising:
a first gate electrode, a first wiring, a second gate electrode over an insulating surface;
a first insulating film over the first gate electrode, the first wiring, and the second gate electrode;
a first semiconductor layer and a second semiconductor layer over the first insulating film; wherein the first semiconductor layer comprises a first channel forming region, a first region and a second region, and the second semiconductor layer comprises a second channel forming region, a third region and a fourth region,
a second insulating film over the first semiconductor layer and the second semiconductor layer;
a first electrode and a second electrode over the second insulating film; and
a pixel electrode over the second insulating film;
wherein the first electrode is electrically connected to the first region,
wherein the first electrode is electrically connected to the first wiring,
wherein the second electrode is electrically connected to the second region,
wherein the second electrode is electrically connected to the second gate electrode,
wherein the pixel electrode is electrically connected to the fourth region, and
wherein the second gate electrode comprises a region overlapped with part of the third region to form a capacitor.
22. A semiconductor device according to claim 21 , wherein the first gate electrode, the first wiring, and the second gate electrode contain a same material.
23. A semiconductor device according to claim 21 , wherein a portion of the pixel electrode is overlapped with the first wiring.
24. A semiconductor device according to claim 21 , wherein the first insulating film and the second insulating film comprise a silicon nitride.
25. A semiconductor device according to claim 21 , further comprising:
an organic light-emitting layer over the pixel electrode.
26. A semiconductor device according to claim 21 , wherein the third region is electrically connected to a power supply line over the second insulating film.
27. A semiconductor device according to claim 21 , further comprising the first gate electrode is electrically connected to a second wiring over the second insulating film.
28. A semiconductor device comprising:
a first gate electrode, a first wiring, a second gate electrode over an insulating surface;
a first insulating film over the first gate electrode, the first wiring, and the second gate electrode;
a first semiconductor layer and a second semiconductor layer over the first insulating film; wherein the first semiconductor layer comprises a first channel forming region, a first region and a second region, and the second semiconductor layer comprises a second channel forming region, a third region and a fourth region,
a second insulating film over the first semiconductor layer, the second semiconductor layer;
a first electrode, a second electrode, and a second wiring over the second insulating film; and
a pixel electrode over the second insulating film;
wherein the first electrode is electrically connected to the first region,
wherein the first electrode is electrically connected to the first wiring,
wherein the second electrode is electrically connected to the second region,
wherein the second electrode is electrically connected to the second gate electrode,
wherein the pixel electrode is electrically connected to the fourth region,
wherein the second wiring is electrically connected to the first gate electrode, and
wherein the second gate electrode comprises a region overlapped with part of the third region to form a capacitor.
29. A semiconductor device according to claim 28 , wherein the first gate electrode, the first wiring, and the second gate electrode contain a same material.
30. A semiconductor device according to claim 28 , wherein a portion of the pixel electrode is overlapped with the first wiring.
31. A semiconductor device according to claim 28 , wherein the first insulating film and the second insulating film comprise a silicon nitride.
32. A semiconductor device according to claim 28 , further comprising:
an organic light-emitting layer over the pixel electrode.
33. A semiconductor device according to claim 28 , wherein the third region is electrically connected to a power supply line over the second insulating film.