Method to prevent static destruction of an active element comprised in a liquid crystal display device
First Claim
1. An active matrix substrate, comprising:
- a scanning line;
a signal line;
a thin film transistor disposed in correspondence with intersections of the scanning line and the signal line;
a pixel electrode disposed in correspondence with the thin film transistor; and
a protective element to prevent static electricity destruction electrically connected between at least one of the scanning line and the signal line, and a common electric potential line, the protective element at least in part forming a pixel electrode material layer.
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Abstract
A liquid crystal display device which utilizes an active matrix substrate and its substrate, and which is provided with a novel method of manufacture which can reduce the manufacturing process of amorphous silicon thin film transistors of reverse stagger construction, and an electrostatic protection means which is created using this method of manufacture. In a thin film transistor manufacturing process, along with forming an aperture for connecting the contact hole and the external terminal in a manufacturing process for a thin film transistor, utilization is made of ITO film as the wiring. The electrostatic protection means is formed from a bidirectional diode (electrostatic protection element) which is composed utilizing an MOS transistor connected between the electrode (PAD) for connecting the external terminal, and the joint electric potential line. The electrostatic protection element is substantially a transistor, with great current capacity, and utilizing the TFT formation process of pixel components in their existent state, the process can be formed without any complications.
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Citations
11 Claims
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1. An active matrix substrate, comprising:
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a scanning line;
a signal line;
a thin film transistor disposed in correspondence with intersections of the scanning line and the signal line;
a pixel electrode disposed in correspondence with the thin film transistor; and
a protective element to prevent static electricity destruction electrically connected between at least one of the scanning line and the signal line, and a common electric potential line, the protective element at least in part forming a pixel electrode material layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification