Semiconductor display device
First Claim
1. A semiconductor display device comprising:
- at least a first thin film transistor and a second thin film transistor;
a first interlayer insulating film formed so as to cover the first thin film transistor and the second thin film transistor;
first, second and third wirings formed over and within the first interlayer insulating film;
a second interlayer insulating film formed over the first interlayer insulating film;
fourth and fifth wirings formed over and within the second interlayer insulating film; and
a display element formed over the second interlayer insulating film and connected to the fifth wiring,wherein the first wiring is connected to a first terminal and a gate electrode included in the first thin film transistor through first and second contact holes formed in the first interlayer insulating film,wherein the second wiring is connected to a second terminal included in the first thin film transistor through a third contact hole formed in the first interlayer insulating film,wherein the third wiring is connected to a first terminal or a second terminal included in the second thin film transistor through a fourth contact hole formed in the first interlayer insulating film,wherein the fourth wiring is connected to the second wiring through a fifth contact hole formed in the second interlayer insulating film, andwherein the fifth wiring is connected to the third wiring through a sixth contact hole formed in the second interlayer insulating film.
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Accused Products
Abstract
It is an object of the present invention to provide a semiconductor display device using a protective circuit in which dielectric breakdown is prevented more effectively. In the invention, in the cases that a first interlayer insulating film is formed covering a TFT used for a protective circuit and a second interlayer insulating film, which is an insulating coating film, is formed covering a wiring formed over the first interlayer insulating film, a wiring for connecting the TFT to other semiconductor elements is formed so as to be in contact with the surface of the second interlayer insulating film so as to secure a path discharging charge accumulated in the surface of the second interlayer insulating film. Note that the TFT used for the protective diode is a so-called diode-connected TFT in which either of the first terminal or the second terminal is connected to a gate electrode.
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Citations
30 Claims
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1. A semiconductor display device comprising:
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at least a first thin film transistor and a second thin film transistor; a first interlayer insulating film formed so as to cover the first thin film transistor and the second thin film transistor; first, second and third wirings formed over and within the first interlayer insulating film; a second interlayer insulating film formed over the first interlayer insulating film; fourth and fifth wirings formed over and within the second interlayer insulating film; and a display element formed over the second interlayer insulating film and connected to the fifth wiring, wherein the first wiring is connected to a first terminal and a gate electrode included in the first thin film transistor through first and second contact holes formed in the first interlayer insulating film, wherein the second wiring is connected to a second terminal included in the first thin film transistor through a third contact hole formed in the first interlayer insulating film, wherein the third wiring is connected to a first terminal or a second terminal included in the second thin film transistor through a fourth contact hole formed in the first interlayer insulating film, wherein the fourth wiring is connected to the second wiring through a fifth contact hole formed in the second interlayer insulating film, and wherein the fifth wiring is connected to the third wiring through a sixth contact hole formed in the second interlayer insulating film. - View Dependent Claims (3, 5, 7, 9, 11, 13, 15, 16, 19, 21, 23, 25, 27, 29)
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2. A semiconductor display device comprising:
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at least first, second and third thin film transistors; a first interlayer insulating film formed so as to cover the first, second and third thin film transistors; first, second, third and fourth wirings formed over and within the first interlayer insulating film; a second interlayer insulating film formed over the first interlayer insulating film; fifth and sixth wirings formed over and within the second interlayer insulating film; and a display element formed over the second interlayer insulating film and connected to the sixth wiring, wherein the first wiring is connected to a first terminal and a gate electrode included in the first thin film transistor through first and second contact holes formed in the first interlayer insulating film, wherein the second wiring is connected to a second terminal included in the first thin film transistor and a first terminal and a gate electrode included in the second thin film transistor through third, fourth and fifth contact holes formed in the first interlayer insulting film, wherein the third wiring is connected to a second terminal included in the second thin film transistor through a sixth contact hole formed in the first interlayer insulating film, wherein the fourth wiring is connected to a first terminal or a second terminal included in the third thin film transistor through a seventh contact hole formed in the first interlayer insulating film, wherein the fifth wiring is connected to the second wiring through eighth and ninth contact holes formed in the second interlayer insulating film, and wherein the sixth wiring is connected to the fourth wiring through a tenth contact hole formed in the second interlayer insulating film. - View Dependent Claims (4, 6, 8, 10, 12, 14, 17, 18, 20, 22, 24, 26, 28, 30)
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Specification