KR0169365B1 - Display device and manufacturing method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel and a manufacturing method thereof, and more particularly, to a display panel for repairing open sources and gate lines by forming a redundancy ring at an edge where a lead is formed; The manufacturing method is related. A gate line is formed on the substrate and a redundancy ring is formed on the fan-out part and the OLB pad portion of the substrate, an insulating layer is formed on the substrate, and the data line crosses the gate line once and the redundancy ring twice. To form. Therefore, in the display panel and the method of manufacturing the same according to the present invention, even if a disconnection occurs in the data pad or the gate pad, the repair is performed by using the redundancy ring, thereby reducing the amount of defective processing, thereby reducing the cost and increasing the process yield. .

Description

Display panel and manufacturing method

FIG. 1 is a layout view illustrating pads formed on a display panel according to the related art.

2 (a) is a detailed view showing the portion X in FIG.

2 (b) is a detailed view showing the portion Y in FIG.

3 is a plan view illustrating a pad of a display panel according to an exemplary embodiment of the present invention.

4 is a cross-sectional view of portions A and B in FIG. 3,

5 and 6 are plan views illustrating pads of a display panel according to an exemplary embodiment of the present invention according to a process sequence thereof.

* Explanation of symbols for main parts of the drawings

1, 11 substrate 2, 21 gate line

3, 31: redundancy ring 4, 41: data line

51: three-layer film A, A1: active area

B1, B2: fan out part C, C1: OLB pad part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel and a manufacturing method thereof, and more particularly, to a display panel for repairing open sources and gate lines by forming a redundancy ring at an edge where a lead is formed; The manufacturing method is related.

With reference to the accompanying drawings will be described in detail with respect to the conventional display panel and its manufacturing method.

FIG. 1 is a layout view showing a pad formed on a display panel according to the related art. FIG. 2A is a detailed view of part X in FIG. 1, and FIG. 2B is a first view of FIG. Figure Y is a detailed view showing the portion.

As shown in FIG. 1, in a conventional display panel, a plurality of gate lines 2 parallel to each other are formed on a substrate 1, and a plurality of data lines 4 are perpendicular to the gate lines 2. It is formed while crossing. A pixel electrode (not shown) is formed in an area where the gate line 2 and the data line 4 intersect, and the redundancy ring 3 surrounds the entire area where the pixel electrode is formed. The redundancy ring 3 is referred to as an active region A, which includes an area in which the redundancy ring 3 intersects each gate line 2 and the data line 4 and is surrounded by the redundancy ring 3.

The plurality of data lines 4 passing through the active area A are curved and integrated in several parts. This part is called a pan out part (B).

The plurality of data lines 4 passing through the fan-out portion B are formed up to the edge end portion of the substrate 1 in parallel with the neighboring data lines 4. This part is attached to the pad of TAB-IC and is called OLB (out lead bonding) pad part (C).

The fan out portion B and the OLB pad portion C are referred to as pad portions.

2 (a) and 2 (b) show the X and Y portions in FIG. 1, and the data line 4 is disconnected.

In the conventional method of manufacturing a display panel, the gate electrode, the gate line 2 and the redundancy ring 3 are simultaneously formed, and an insulating film, a semiconductor layer, and a contact layer (hereinafter referred to as a three-layer film) are stacked, and the gate electrode and the gate line are stacked. (2) and the contact layer and the semiconductor layer of the remaining portions except on the redundancy ring 3 are etched, and then the data line 4 is formed. Thereafter, the insulating layer outside the active region A is also removed.

In the conventional display panel, a signal is transmitted through the gate line 2 and the data line 4.

However, in such a conventional display panel, although the trunk line of the gate line 2 and the data line 4 in the active area A can be repaired by the redundancy ring 3, the fan-out part B or the OLB pad part can be repaired. If disconnection occurs in (C), there is a problem that healing is impossible.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and to provide a redundancy ring in the fanout and OLB pad portions so as to be repaired when a disconnection occurs in the data line.

The display panel according to the present invention for achieving the above object is a display panel consisting of an active region and a pad portion in which a plurality of display elements are formed, and is formed in the same direction over the active region and the pad portion, A plurality of signal lines for driving an element and a plurality of redundancy rings formed to intersect the signal lines two or more times in the pad portion, the substrate for display device according to the present invention for achieving this object is an active region And a substrate comprising a pad region, a plurality of parallel gate lines formed on the substrate, an insulating layer formed to cover the gate lines, and intersecting and paralleling the gate line and the active region with the insulating layer therebetween. A plurality of data lines, formed between the substrate and the insulating layer, in the pad region; Double-byte line includes a plurality of redundant ring crossing.

In order to achieve the above object, a method of manufacturing a display panel according to the present invention includes forming a redundancy ring on a fan-out portion of the substrate and an OLB pad portion at the same time as forming a gate line on the substrate, and forming an insulating layer on the substrate. And forming a data line on the insulating layer, wherein the data line crosses the gate line once and the redundancy ring twice.

In the display panel according to the present invention, when a disconnection occurs in the data line at the fan out and the OLB pad portions, the data line is grounded using a laser at two portions crossing the redundancy ring and applied to the data line through the reader redundancy ring. Will carry a signal.

Next, an embodiment of a display panel according to the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

3 is a plan view illustrating a pad of a display panel according to an exemplary embodiment of the present invention, FIG. 4 is a cross-sectional view of portions A and B of FIG. 3, and FIGS. 5 and 6 are views according to an exemplary embodiment of the present invention. It is a top view which shows the pad of a panel according to the process sequence.

As shown in FIG. 3, in the display panel according to the exemplary embodiment of the present invention, gate lines 21 parallel to each other are formed on the substrate 11 in the active region A1, and a plurality of data lines 41 are formed. It is formed while crossing the gate line 21 perpendicularly. A pixel electrode (not shown) is formed in an area where the gate line 21 and the data line 41 intersect, and a redundancy ring 31 surrounds the entire area where a plurality of pixel electrodes are formed. The redundancy ring 31 is formed to cross each gate line 21 and the data line 41.

In the pan out portion B1, the plurality of data lines 41 passing through the active area A1 are curved and integrated in portions, and each of the plurality of data lines 41 intersects the plurality of data lines 41 twice. A plurality of rectangular redundancy rings 31 'are formed in a closed curve shape, and the OLB pad portion C1 also crosses a plurality of data lines 41 twice, respectively, and has a closed curved redundancy ring 31 ″. Many of these are formed. At this time, it is preferable that the redundancy rings 31 'and 31 "of the fan-out portion B1 and the OLB pad portion C1 are provided with respect to the data lines 41 gathered in one place. The redundancy rings 31 'and 31 "are formed in the same manner in the fan out portion B1 and the OLB pad portion C1 in which the gate lines 21 are formed.

4 is a cross-sectional view of portion A or B of FIG. 3, in which a redundancy ring 31 'is formed on the substrate 11, and an insulating film 51', a semiconductor layer 51 " The three-layer film 51, which is a layer 51 " ', is formed to cover the redundancy ring 31', and the OLB pad 41 'extending from the data line 41 on the three-layer film 51 is the redundancy ring 31. ′) And an ITO film 61 is formed on the OLB pad 41 ′.

The manufacturing method of the display panel according to the present invention is made as follows.

As shown in FIG. 5, the gate line 21, the gate electrode, and the redundancy ring 31 are formed on the substrate 11, and the redundancy ring 31 ′ and the OLB pad portion ( The redundancy ring 31 ″ is formed in C1).

The three-layer film 51 is formed to cover the gate line 21, the gate electrode, and the redundancy rings 31, 31 ′, and 31 ″. The data line 41 is formed to intersect the redundancy rings 31 'and 31 ". (See Figure 6)

Accordingly, in the display panel and the method of manufacturing the same according to the present invention, even if a disconnection occurs in the data pad or the gate pad, the redundancy ring is used to repair the defective processing, thereby reducing the cost and increasing the process yield.

Claims (12)

A display panel comprising an active region and a pad portion, in which a plurality of display elements are formed, a plurality of signal lines formed in the same direction across the active region and the pad portion and driving the display element, and the signal line on the pad portion. And a plurality of redundancy rings formed to intersect with each other two or more times. The display panel of claim 1, wherein the pad part comprises an OLB pad part which is a part where the plurality of signal lines form a plurality of groups and a fan out part gathered from the active area and the signal lines gathered in parallel. The display panel of claim 2, wherein the redundancy rings are respectively present in the fan out portion and the OLB pad portion. A substrate comprising an active region and a pad region, a plurality of parallel gate lines formed on the substrate, an insulating layer formed to cover the gate line, and intersecting the gate line with the active region with the insulating layer interposed therebetween A plurality of parallel data lines, and a plurality of redundancy ring formed between the substrate and the insulating layer and intersecting the gate line twice in the pad region. 5. The display device of claim 4, wherein the pad area comprises a fan out part, which is a part of the plurality of data lines parallel to each other, and an OLB pad part, in which the data lines gather in parallel. Board. The substrate of claim 4, wherein the redundancy ring is present in the fan out portion and the OLB portion, respectively. 5. The substrate of claim 4, wherein the redundancy rings exist one by one with respect to the group of data lines gathered at one point in the fan out portion. The substrate of claim 4, wherein the redundancy ring has a closed curve shape. The substrate of claim 4, wherein a semiconductor layer and a contact layer are sequentially formed on the insulating layer on the gate line and the redundancy ring. The display mounting substrate of claim 4, wherein the insulating layer is formed only in an active region. Forming a redundancy ring on the fan out portion and the OLB pad portion of the substrate at the same time as forming a gate line on the substrate, forming an insulating layer on the substrate, once with the gate line on the insulating layer, the redundancy ring And forming a data line intersecting twice. The method of claim 11, further comprising forming a semiconductor layer and a contact layer on the insulating layer to cover the gate line and the redundancy ring.