Method for manufacturing liquid crystal display device with particular pad protection layers
First Claim
1. A method of manufacturing an LCD panel, comprising:
- forming a TFT substrate having an active region and a pad region, wherein the active region has a signal line and a signal electrode, and the pad region has a signal pad having an electrical connecting portion;
forming a light-shielding material layer over the active region and the pad region;
patterning the light-shielding material layer to form a matrix pattern in the active region and an erosion barrier film in the pad region, wherein the erosion barrier film substantially covers the electrical connecting portion of the signal pad and is formed as an island separated from the matrix pattern; and
forming a color filter in the active region after patterning the light-shielding material layer.
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Accused Products
Abstract
A method of manufacturing an LCD panel that avoids erosion of a transparent conductive film. The method includes forming a TFT substrate with an active region and with a pad region having a transparent conductive film. The TFT substrate is covered with a light-shielding material. That light shielding material is patterned to form a black matrix in the active region and an erosion barrier film over the transparent conductive film in the pad region. Beneficially, the black matrix and the erosion barrier film are formed of the same material, using the same mask. Color filters are electrodeposited from an aqueous solution without erosion of the transparent conductive film in the pad region.
7 Citations
18 Claims
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1. A method of manufacturing an LCD panel, comprising:
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forming a TFT substrate having an active region and a pad region, wherein the active region has a signal line and a signal electrode, and the pad region has a signal pad having an electrical connecting portion; forming a light-shielding material layer over the active region and the pad region; patterning the light-shielding material layer to form a matrix pattern in the active region and an erosion barrier film in the pad region, wherein the erosion barrier film substantially covers the electrical connecting portion of the signal pad and is formed as an island separated from the matrix pattern; and forming a color filter in the active region after patterning the light-shielding material layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An LCD panel, comprising:
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a TFT substrate having an active region, a gate pad region having a first electrical connecting portion, and a data pad region having a second electrical connecting portion; a matrix pattern in said active region; a first erosion barrier film substantially covering the first electrical connecting portion in said gate pad region; a second erosion barrier film substantially covering the second electrical connecting portion in said data pad region, wherein the matrix pattern is made of the same material as the first and second erosion barrier films and the first and second erosion barrier films are formed as an island separated from the matrix pattern; and color filters in said active region. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of manufacturing an LCD panel, comprising:
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forming a TFT substrate having a gate line, a data line, a thin film transistor and a pixel electrode in an active region and a data pad and a gate pad in a pad region, wherein the thin film transistor includes a drain electrode and a source electrode on a semiconductor layer; forming a light-shielding material layer over the TFT substrate; removing the light-shielding material layer where a color filter and a sealant are to be located to form a matrix pattern in the active region and an erosion barrier film in the pad region, wherein the light-shielding material layer substantially remains over the data pad and the gate pad and the erosion barrier film is formed as an island separated from the matrix pattern; electrodepositing the color filter, wherein the light-shielding material layer remaining substantially over the data pad and gate pad prevents the data pad and gate pad from being exposed to an aqueous solution during the electro-deposition of the color filter; locating the sealant on the TET substrate; attaching an opposing substrate to the TFT substrate; and interposing a liquid crystal layer between the TFT substrate and the opposing substrate. - View Dependent Claims (17, 18)
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Specification