JPH0519281A - Substrate for forming matrix type display panel - Google Patents

Abstract

PURPOSE:To improve the inspection in the manufacturing process of an LCD panel. CONSTITUTION:In this substrate for forming a matrix type display panel, in which plural matrix type display panels are placed like a matrix and formed integrally on a single substrate, each scan line 4 which plural matrix type display panels have is short-circuited separately to each scan line 4 which.the matrix type display panels being adjacent in the direction of the scan line 4 have, and each data line 5 is short-circuited separately to each data line 5 which the matrix type display panels being adjacent in the direction of the data line 5 have. Also, the one end of each data line 5 and the one end of each scan line are all short-circuited, and in the other end of each data line 5 and in the other end of each scan line 4, electrode pads 6, 7 for an inspection are provided separately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate for forming a matrix type display panel and a method for manufacturing the matrix type display panel, and more particularly to an active matrix type liquid crystal display (LCD) using a thin film transistor (TFT).
Used for etc.

[0002]

2. Description of the Related Art An LCD panel is drawing attention as a flat panel display device. This LCD panel is integrally formed on a substrate such as glass in a plurality of units such as 9 panels or 16 panels, and finally divided into each panel to mount a driver.

This is schematically shown in FIG. 3 in the case of 9 panels. 9 LCDs on the glass substrate 1
Panel 2 ₁ to 2 ₉ are adapted to be disposed in the 3 × 3 matrix, which is surrounded by a short line 3. FIG. 4A shows this in more detail. Conductive shorting line in a grid pattern on the glass substrate 1 is disposed integrally, scan line 4 and the data line 5 for each of the LCD panel 2 ₁ to 2 ₉ are wired in matrix therein . Further, one ends of the scan line 4 and the data line 5 are individually connected to the short circuit line 3, a scan inspection pad 6 is provided at the other end of the scan line 4, and a data inspection pad 7 is provided at the other end of the data line 5. There is. This will be shown in more detail in FIG. Picture elements 8 are formed in a matrix on each of the LCD panel 2 ₁ to 2 _9, this picture element is connected to a drain of TFT9 as a drive element. And TF
The scan line 4 is connected to the gate of T9, and the data line 5 is connected to the source thereof.

The inspection in the manufacturing process of such a matrix type display panel, especially the disconnection of the scan line 4 and the data line 5 and the inspection of the plug or the short circuit are conducted by using a probe card. That is, the probe or probe card needle is brought into contact with the scan inspection pad 6 and the data inspection pad 7, and the disconnection and short circuit thereof are inspected through the short-circuit line 3.

[0005]

However, when forming 9 panels or 16 panels on a single substrate, the number of scan inspection pads 6 and data inspection pads 7 is (640 + 480) × 9 or (640 + 48).
0) × 16, which requires a long time for the inspection of disconnection and short circuit. And this situation, as in FIG. 5, nine LCD panel 2 ₁ shorting line 3 for each to 2 _{9 1-3 9}
This is also the case when is provided.

By the way, the manufacturing technology of LCD panel has been remarkably advanced due to technological innovation, and the manufacturing yield is greatly improved as compared with the conventional technology. For this reason, the purpose of the inspection using the scan inspection pad 6 and the data inspection pad 7 has been to select a good panel in the past, but recently to extract a defective panel on a single substrate. Is changing. Therefore, which board in which substrate is defective is not the main concern, and therefore simplification of the inspection process has been demanded.

Therefore, it is an object of the present invention to provide a substrate for forming a matrix type display panel which can simplify the inspection process.

[0008]

The present invention provides a matrix type display panel forming substrate in which a plurality of matrix type display panels are arranged in a matrix and integrally formed on a single substrate. Each scan line of the display panel is individually short-circuited with each scan line of the matrix type display panel adjacent in the direction of the scan line, and each data line of the plurality of matrix type display panels is And each data line of the matrix type display panel adjacent to each other in the direction is individually short-circuited.
Here, one end of each data line and one end of each scan line are all short-circuited, and electrode pads for inspection are individually provided at the other end of each data line and the other end of each scan line. Is desirable.

[0009]

According to the present invention, each scan line is short-circuited between adjacent matrix type display panels on a single substrate, and each data line is also short-circuited between matrix type display panels. Therefore, a single inspection process can simultaneously inspect scan lines and data lines of adjacent matrix type display panels for short circuits and disconnection of a plurality of panels.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same elements will be denoted by the same reference symbols, without redundant description.

FIG. 1 is a plan view of a substrate for forming an active matrix type LCD panel according to an embodiment. As shown, the single glass substrate 1 nine LCD panel 2 ₁ -
2 ₉ are arranged in a matrix, all of which are surrounded by a short circuit line 3. The scan line 4 has LCD panels 2 ₁ to 2 ₃ and 2 ₄ to 2 which are horizontally adjacent to each other.
_6, 2 ₇ is formed commonly to to 2 _9, LCD panel 2 ₁ data line 5 vertically adjacent, 2 _4,
2 ₇ , LCD panels 2 ₂ , 2 ₅ , 2 ₈ and LCD panels 2 ₃ , 2 ₆ , 2 ₉ are formed in common. The left end of the scan line 4 and the upper end of the data line 5 are connected to the short circuit line 3, and the scan inspection pads 6 are individually provided at the right end of the scan line 4.
Data inspection pads 7 are individually provided at lower ends of the data lines 5.

According to the above embodiment, the scan line 4
Also, the inspection for disconnection and short circuit of the data line 5 can be greatly shortened. This is because the number of times the needles of the probe or probe card are brought into contact with each other is reduced. Here, according to the present invention, the inspection can be simplified, but it is not possible to specify which panel in the substrate 1 is the defective panel. But,
In the present situation where the yield has improved due to technological innovation, if several defects exist in a wide area of the substrate 1, it is better not to perform subsequent processing, so it is possible to determine the presence and number of defective panels. Just enough. In particular, in manufacturing an LCD panel, since a high-cost process is performed after the scan line 4 and the data line 5 are inspected, it is important to easily find the substrate 1 including the defective panel. To explain this in more detail, the LCD panel is shown in FIG.
It is manufactured through such steps.

First, the glass substrate 1 is received and washed (step 201), and the scan line 4 is formed on the entire surface (step 202). Then, the prober inspects the scan line 4 for disconnection and short circuit and separates it (step 203). At this time, if the number of defects in the scan line 4 exceeds a certain number, the process is returned to the previous step or removed from the next process without performing the post process. The number of operations of the prober in the inspection of the scan line 4 is significantly smaller than that of the conventional one,
This simple inspection allows subsequent steps (especially high cost T
It is possible to prevent unnecessary execution of the FT manufacturing process).

Next, the TFT is manufactured, its inspection and classification are performed (step 204), then the data line 5 is manufactured (step 205), and the inspection and classification of the scan line 4 and the data line 5 are performed using a prober. (Step 205). The inspection of this step 205 also includes the scan inspection pad 6 and the data inspection pad 7.
However, since the LCD panels 2 are commonly used, it can be greatly simplified. The glass substrate determined to have a certain degree of defects or more by the inspection of the scan line 4 and the data line 5 as described above is removed from the process or returned to the previous process, and the subsequent process is wasted. It never happens. In particular, the step of attaching the counter substrate (step 209) is very expensive, and the step of forming the pixel electrode (step 207) and the liquid crystal encapsulating step (step 210) are also very expensive. Further, the process of forming the alignment film (step 208) and the process of dividing the glass substrate into the LCD panel 2 (step 211) are also performed.
Although it requires a certain amount of cost, it is possible to eliminate waste by removing the glass substrate 1 including some defective panels from the process by a simple inspection in advance.

After the glass substrate is divided into the LCD panel 2 in step 211, inspection and sorting by lighting of all picture elements (step 212), mounting of drivers and TAB (step 213), and operation as an LCD panel. Drive inspection and classification (step 214) are performed.

[0016]

As described above, each scan line and each data line are short-circuited between adjacent matrix type display panels. Therefore, it is possible to simultaneously inspect a scan line and a data line for short-circuit and disconnection of adjacent matrix type display panels by a single inspection operation. Therefore, in accordance with the cost minimum set by the material cost and the number of processes in the process after inspection and sorting, the number of defects of the substrate to be removed from the subsequent process is obtained, and the substrate is selected based on this.
It is possible to obtain a matrix type display panel at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of an LCD panel according to an embodiment.

FIG. 2 is a flowchart showing a manufacturing process of an LCD panel according to an example.

FIG. 3 is a plan view of an LCD panel according to a conventional example.

FIG. 4 is a configuration diagram of a main part of the LCD panel of FIG.

FIG. 5 is a plan view of an LCD panel according to a conventional example.

[Explanation of symbols]

1 ... Glass substrate 2 ... LCD panel 3 ... Inspection line 4 ... Scan line 5 ... Data line 6 ... Scan inspection pad 7 ... Data inspection pad 8 ... Picture element 9 ... TFT

Claims (3)

[Claims] 1. A substrate for forming a matrix type display panel in which a plurality of matrix type display panels are arranged in a matrix and integrally formed on a single substrate, wherein each scan included in the plurality of matrix type display panels Lines are individually short-circuited with the respective scan lines of the matrix type display panel adjacent to each other in the direction of the scan line, and the respective data lines of the plurality of matrix type display panels are adjacent to each other in the direction of the data line. A substrate for forming a matrix type display panel, which is individually short-circuited with each of the data lines of the matrix type display panel. 2. One end of each of the data lines and one end of each of the scan lines are all short-circuited, and an electrode pad for inspection is provided at the other end of each of the data lines and the other end of each of the scan lines. The substrate for forming a matrix type display panel according to claim 1, which is provided individually. 3. The substrate for forming a matrix type display panel according to claim 1, wherein the matrix type display panel is an active matrix type display panel using a thin film transistor as a driving element.