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Array substrate

a substrate and array technology, applied in the field of array substrates, can solve problems such as cracks generated at the area

Inactive Publication Date: 2012-03-01
CHUNGHWA PICTURE TUBES LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an array substrate that solves the problem of cracks in transparent conductive materials. The method of manufacturing the substrate involves forming an organic material layer covering the substrate and the thin film transistor, and then creating a via hole in the organic material layer to expose the drain electrode. A first inorganic material layer is then formed to cover at least a sidewall of the via hole and a part of the organic material layer, and to expose at least the drain electrode. A patterned transparent pixel electrode layer is then formed on the first inorganic material layer, which contacts the drain electrode through the via hole. The patterned transparent pixel electrode layer is disposed on the inorganic material layer, which helps prevent cracks from forming due to temperature variations."

Problems solved by technology

Because of the large difference in the coefficients of thermal expansion between the normal material of the planar layer and the transparent conductive material, there will be cracks generated at the area with weaker mechanical structure in the transparent conductive material after thermal treatment of the substrate, such as annealing.

Method used

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Embodiment Construction

[0018]Certain terms are used throughout the description and following claims to refer to particular components. As one skilled in the art will understand, electronic equipment manufacturers may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms “include” and “comprise” are used in an open-ended fashion, and thus should be interpreted to mean “include, but not limited to . . . .”

[0019]FIG. 1 is a schematic diagram illustrating a top view of an array substrate according to the preferred embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a cross-sectional view of the array substrate along the line AA′ and the line BB′ in FIG. 1 according to the first preferred embodiment of the present invention.

[0020]Please refer to FIG. 1 and FIG. 2, an array substrate 10 comprises a substrate 12 divided into a device area 1...

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Abstract

An array substrate includes a substrate, an organic layer, a via hole, an inorganic layer, and a patterned transparent pixel electrode layer. The thin film transistor is disposed on the substrate, and the thin film transistor comprises a drain electrode. The organic material layer covers the substrate and the thin film transistor. The via hole penetrates the organic material layer and exposes the drain electrode. The inorganic material layer covers at least a sidewall of the via hole and a part of the organic material layer, and exposes the drain electrode through the via hole. The patterned transparent pixel electrode layer is disposed on the first inorganic material layer and in the via hole, and the patterned transparent pixel electrode layer contacts the drain electrode.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an array substrate, and more particularly, to an array substrate with a structure to keep transparent electrodes from cracking.[0003]2. Description of the Prior Art[0004]Among current display technologies, liquid crystal displays are widely used in electronic devices because of their advantages, such as light weight, small volume, low power consumption, and radiation-free characteristics.[0005]In general, a plurality of scan lines and a plurality of data lines are disposed on an array substrate of a liquid crystal display panel. The scan lines and the data lines are arranged perpendicular to each other to divide the substrate into a plurality of pixel units. Each of the pixel units has a pixel electrode and a thin film transistor (TFT). The thin film transistor is electrically connected to the scan line and the data line, for being a switching device of the pixel electrode. The pixel ele...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L29/786
CPCH01L27/1248H01L27/1244
Inventor CHANG, HSI-MING
Owner CHUNGHWA PICTURE TUBES LTD