CN110376808A - Array substrate, manufacturing method thereof and display panel - Google Patents

Abstract

The application discloses an array substrate, a manufacturing method thereof, and a display panel. The array substrate includes a substrate; a color-resist layer arranged on the substrate, and the color-resist layer includes a plurality of color-resistors, adjacent edges of the color-resist are overlapped to form an overlapping area; groove. In this application, a groove is set under the overlapping area of the color resistance, so that part of the color resistance in the overlapping area can be accommodated in the overlapping area without being too protruding, so that the surface of the entire color resistance layer is relatively flat, and the distribution of liquid crystals is very uniform , There will be no display problems such as light leakage.

Description

A kind of array substrate and its manufacturing method and display panel

technical field

The present application relates to the field of display technology, in particular to an array substrate, a manufacturing method thereof, and a display panel.

Background technique

Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or Laptop screens, etc., dominate the field of flat panel displays. A liquid crystal display panel is usually composed of a color filter substrate (Color Filter Substrate, CF Substrate), a thin film transistor array substrate (Thin FilmTransistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer) arranged between the two substrates. Composition, its working principle is to control the rotation of the liquid crystal molecules in the liquid crystal layer by applying a driving voltage on the two glass substrates, and refract the light from the backlight module to produce a picture.

During the deposition process of the color filter substrate or array substrate, the color resists tend to stack and protrude, resulting in uneven liquid crystal distribution, resulting in light leakage and affecting the display effect.

Contents of the invention

The purpose of the present application is to provide an array substrate, its manufacturing method and a display panel, so as to solve problems such as light leakage caused by color resist stacking.

The present application discloses an array substrate, which includes a substrate; a color-resist layer disposed on the substrate, the color-resist layer includes a plurality of color-resistors, and adjacent edges of the color-resistors are overlapped to form overlapping regions; A groove under the overlap area.

Optionally, the array substrate includes an insulating layer, the insulating layer is arranged between the color resist layer and the substrate, the groove is arranged on the insulating layer, and the opening of the groove faces the the overlapping area.

Optionally, the insulating layer includes a first insulating layer and a second insulating layer, the first insulating layer is arranged between the second insulating layer and the color resistance layer, and the groove is arranged in the on the first insulating layer.

Optionally, the materials of the first insulating layer and the second insulating layer are different.

Optionally, the insulating layer includes a first insulating layer and a second insulating layer, the first insulating layer is arranged between the second insulating layer and the color resistance layer, and the groove is arranged in the on the second insulating layer.

Optionally, the array substrate includes a first metal layer, the first metal layer is disposed between the first insulating layer and the second insulating layer, and corresponds to the position of the overlapping region, the A groove is disposed in the second insulating layer above the first metal layer.

Optionally, the array substrate includes a second metal layer, the second metal layer is disposed between the substrate and the second insulating layer, and corresponds to the color resistance in the color resistance layer; There is a notch between the groove and the adjacent second metal layer; the groove and the notch are separated by bumps.

Optionally, the top of the overlapping region is flush with the top of the color resist layer.

This application also discloses a method for manufacturing an array substrate, including steps:

form the substrate;

forming grooves on the substrate; and

forming a color-resist layer containing a plurality of color-resistors on the groove and overlapping edges of the color-resistors;

Wherein, edges of adjacent color resists overlap to form an overlapping area, and the groove is disposed below the overlapping area.

The present application also discloses a display panel, comprising the above-mentioned array substrate, a color filter substrate arranged opposite to the array substrate, and a liquid crystal layer arranged between the array substrate and the color filter substrate.

In this application, a groove is set under the overlapping area of the color resistance, so that part of the color resistance in the overlapping area can be accommodated in the overlapping area without being too protruding, so that the surface of the entire color resistance layer is relatively flat, and the distribution of liquid crystals is very uniform , There will be no display problems such as light leakage.

Description of drawings

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation of the present application, and explain the principle of the present application together with the text description. Apparently, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort. In the attached picture:

FIG. 1 is a schematic diagram of a display panel according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an array substrate according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an array substrate according to another embodiment of the present application;

FIG. 4 is a schematic diagram of an array substrate according to another embodiment of the present application;

FIG. 5 is a schematic diagram of an array substrate according to another embodiment of the present application;

FIG. 6 is a flow chart of a manufacturing method of an array substrate according to another embodiment of the present application.

Among them, 100, display panel; 200, array substrate; 210, substrate; 220, color resist layer; 230, overlapping area; 240, groove; 250, insulating layer; 251, first insulating layer; 252, second insulating layer layer; 260, first metal layer; 270, second metal layer; 280, notch; 290, bump; 300, color filter substrate; 400, liquid crystal layer.

Detailed ways

It should be understood that the terminology and specific structural and functional details disclosed herein are representative only for describing specific embodiments, but the application can be embodied in many alternative forms and should not be construed as merely Be limited by the examples set forth herein.

In the description of the present application, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating relative importance, or implicitly indicating the quantity of indicated technical features. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features; "plurality" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, possible presence or addition of one or more other features, integers, steps, operations, units, components and/or combinations thereof.

Also, Center, Horizontal, Top, Bottom, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer The terms indicating the orientation or positional relationship are described based on the orientation or relative positional relationship shown in the drawings, and are only for the convenience of describing the simplified description of the application, rather than indicating that the referred device or element must have a specific orientation. , are constructed and operate in a particular orientation and therefore are not to be construed as limiting the application.

In addition, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection , can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The application will be further described below with reference to the accompanying drawings and optional embodiments.

As shown in FIG. 1 , the embodiment of the present application discloses a display panel 100 , including an array substrate 200 and a color filter substrate 300 arranged opposite to each other, and a liquid crystal layer arranged between the array substrate 200 and the color filter substrate 300 400. As shown in FIG. 2, the array substrate 200 in the embodiment of the present application includes a substrate 210; The edges of the color resist are overlapped to form an overlapping region 230 ; the groove 240 is disposed below the overlapping region 230 . During the manufacturing process of the array substrate 200, the gap between each color resist in the color resist layer 220 is relatively small, and it is difficult to control the distance between each color resist in the process of depositing the color resist, which easily causes overlapping of the color resists. ; In addition, the shape of the color resistance is not stable just after deposition, and heating and other steps are required to solidify. Before these steps, the color resistance will flow around due to the unstable state, so that the edges of adjacent color resistances will also overlap. There may be other factors that lead to color resistance overlap, which will not be listed here. After overlapping, the color resists will protrude from other positions in the color resist layer 220, so that the surface of the color resist layer 220 is uneven, resulting in uneven thickness of the liquid crystal between the color filter substrate 300 and the array substrate 200, resulting in light leakage when the liquid crystal molecules are deflected. And other issues. Based on this, the present application sets corresponding grooves 240 below the overlapping area 230 of the color resistance to accommodate the color resistance of the partial overlapping area 230, so that the surface of the color resistance layer 220 changes evenly, so that the thickness of the liquid crystal layer 400 will become uniform. In addition, the top of the overlapping region 230 is flush with the top of the color-resist layer 220 , so that the overall thickness of the liquid crystal will remain consistent, achieving an ideal state without display problems.

Specifically, the display panel 100 adopts an integrated technology (Color Filter on Array, COA) that integrates the color filter and the array substrate 200 together. The color resistance layer 220 includes color resistances of at least three colors, and the color resistance layer 220 may include color resistances of three colors of red, green and blue, or four colors of red, green, blue and white, or may include red, green and blue color resistances. The color resistance of the four colors of blue and yellow is not limited here, because no matter what kind of color resistance is used, the overlap of the color resistance will not be affected; as for the substrate 210 , glass or plastic can be used.

In addition, the display panel 100 in the present application may be a flat display panel 100 or a curved display panel 100 (curved display), and the color resistance stacking in the curved display panel 100 will be more serious, because when the curved display panel 100 is not When in use, that is, when the display panel 100 is not bent, the color resists are already stacked, and when the display panel 100 is bent, the color resists are squeezed and stacked more seriously. Nowadays, the curved display panel 100 and the curved display are becoming more and more popular, because when watching the curved display, the distance between the viewer's eyes and each position of the curved display is about the same, regardless of whether it is the central area or the left and right edge areas. The displayed picture can be watched by the viewer at a viewing angle close to a right angle, so compared with the flat display panel 100 and the flat display, the curved display will not have problems such as brightness deviation and color deviation when viewed at a large viewing angle; in addition, the curved display also has Similar to three-dimensional visual effects. Therefore, the curved display has become a display product that attracts high attention. However, since the curved display is formed by bending the flat display panel 100 with an external force, there will be a relative positional deviation between the two substrates, including the aforementioned color-resist extrusion problem, which will cause light leakage and affect the curved surface The display quality of the monitor.

In the above display panel 100, the array substrate 200 further includes an insulating layer 250, the insulating layer 250 is arranged between the color resistance layer 220 and the substrate 210, and the groove 240 is arranged in the insulating layer 250 , the opening of the groove 240 faces the overlapping region 230 . An insulating layer 250 is provided between the color-resistive layer 220 and the substrate 210 to separate the color-resistive layer 220 from other structures, preventing other structures from affecting the color-resistive effect; in addition, the structure of the insulating layer 250 is very stable, and the color-resistive layer is deposited on the insulating layer There is no reaction on the 250. The groove 240 is provided on the insulating layer 250 because the area of the insulating layer 250 is large, and almost no etching or exposure and development steps are required after deposition, and the groove 240 corresponds to the overlapping area 230 of the color resist, and the adjacent color There is an overlapping area 230 between the color resistors, that is to say, there is a groove 240 between adjacent color resistors, so it can be seen that the number of grooves 240 is relatively large, but the structure that meets the requirements of setting grooves 240 without additional addition is very small. Therefore, the groove 240 is chosen to be provided on the insulating layer 250 .

As shown in FIG. 3 , the insulating layer 250 includes a first insulating layer 251 and a second insulating layer 252, the first insulating layer 251 is arranged between the second insulating layer 252 and the color resistance layer 220, and the The groove 240 is disposed on the first insulating layer 251 . The reason why two insulating layers 250 are set and the groove 240 is arranged on the first insulating layer 251 is because when the groove 240 is etched, if the first insulating layer 251 is etched through, there is also the second insulating layer 252 that can play a role. The etching function is blocked to prevent the etching liquid or etching gas from etching the structure under the insulating layer 250 , causing damage to the panel and affecting the display of the panel. Moreover, the materials of the first insulating layer 251 and the second insulating layer 252 can also be different, so that when the etching liquid or etching gas used to etch the first insulating layer 251 etches through the first insulating layer 251, it is not easy to etch the second insulating layer 251. The second insulating layer 252 can prevent the etching speed of the second insulating layer 252 from being too fast. Wherein, the first insulating layer 251 is a passivation layer (PV, Passivation layer), which is made of silicon nitride or silicon oxide. The reason why the first insulating layer 251 is set as a passivation layer is that the surface of the passivation layer is flat and the color After the resist layer 220 is deposited on the passivation layer, it will not be uneven, and the thickness of the liquid crystal layer 400 will be relatively uniform.

In addition, as shown in FIG. 4, the groove 240 can also be made on the second insulating layer 252, and the groove 240 is not formed on the first insulating layer 251, and the first insulating layer 251 is still arranged on the second insulating layer 252. Between the layer 252 and the color resist layer 220 , the opening of the groove 240 faces the first insulating layer 251 . After adopting the structure in which the groove 240 is arranged on the second insulating layer 252, when the depth of the groove 240 is not enough, the top of the color-resist overlapping region 230 will still protrude from other positions of the color-resist layer 220; When the depth is large, the top of the color-resist overlapping region 230 will be recessed compared to other positions of the color-resist layer 220 , both of which will make the thickness of the liquid crystal layer 400 uneven, causing problems such as display light leakage. However, after the structure of the groove 240 is first arranged on the second insulating layer 252, when the depth of the groove 240 is found to be large, the first insulating layer 251 can be deposited later, and the first insulating layer corresponding to the groove 240 The part 251 is made thicker, which can make up for the deep defect of the groove 240, so that the top of the color resist layer 220 is flush with the top of the overlapping region 230; and when the depth of the groove 240 is not enough, the first insulating layer can be deposited behind layer 251, make a gap 280 in the part of the first insulating layer 251 corresponding to the groove 240, or make a thicker part of the first insulating layer 251 not corresponding to the groove 240, so that the second insulating layer 252 After the groove 240 is stacked with the corresponding part of the first insulating layer 251 , the depth becomes larger, so that the top of the color resist layer 220 is flush with the top of the overlapping region 230 . Using the embodiment shown in FIG. 4, if there is a problem with the groove 240 formed in the previous step, the first insulating layer 251 can be adjusted in the next step, so that the present application has a greater fault tolerance rate and reduces production costs. Improve production yield.

After the groove 240 is made on the first insulating layer 251, the groove 240 can penetrate the first insulating layer 251, so that the depth of the groove 240 can be increased, so that the part of the overlapping region 230 protruding from the surface of the color resist layer 220 can be accommodated in the groove. In the groove 240; if the groove 240 that runs through the first insulating layer 251 is still not enough to accommodate the protruding part of the overlapping region 230, the second insulating layer 252 can be etched downwards, so that the depth of the groove 240 increases until the top of the overlapping region 230 It is flush with the top of the color resist layer 220 .

As shown in FIG. 5, the array substrate 200 includes a first metal layer 260, the first metal layer 260 is disposed between the first insulating layer 251 and the second insulating layer 252, and overlaps with the The location of the region 230 corresponds to that the groove 240 is disposed in the second insulating layer 252 above the first metal layer 260 . Since the overlapping area 230 is composed of color resists of two colors, it can play a light-shielding function. However, due to the uneven distribution of the color resists in the overlapping area 230, there is still a risk of light leakage. A metal wire is used to enhance the light-shielding effect. Of course, the first metal layer 260 can also be replaced with other light-shielding materials, which is not limited here. The first metal layer 260 is disposed between the first insulating layer 251 and the second insulating layer 252 to prevent the first metal layer 260 from being oxidized. At the same time, in order to prevent the first metal layer 260 from being disposed between the first insulating layer 251 and the second insulating layer 252 from causing the bottom of the groove 240 to become thicker, thereby making the depth of the groove 240 shallower, the first The thickness of the first insulating layer 251 above the metal layer 260 is reduced, so that the depth of the groove 240 will not become shallower. Of course, an opening can also be provided on the second insulating layer 252, and the first metal layer 260 is placed in this opening. In this way, the first metal layer 260 will not affect the groove 240 either.

The array substrate 200 further includes a second metal layer 270, the second metal layer 270 is arranged between the substrate 210 and the second insulating layer 252, and the second metal wire and the color resistance layer 220 Each color resistance corresponds; there is a gap 280 between the groove 240 and the adjacent second metal layer 270 . In this way, the height of the insulating layer 250 above the second metal layer 270 is the largest, while the height of the insulating layer 250 in other parts is intersecting. Specifically, there are two gaps 280 and a groove 240 between two adjacent second metal layers 270, which can There are many overlapping areas 230 to be accommodated; the reason why the gap 280 is added is that the thickness of the insulating layer 250 is relatively thin, and the depth and area of the groove 240 arranged in the insulating layer 250 may not be enough to accommodate the protrusion of the overlapping area 230. Therefore, the gap 280 is provided to share the pressure of the groove 240 , so that even if adjacent color resists overlap more, the overlapping region 230 will not protrude from the surface of the color resist layer 220 .

There are two protrusions 290 at both ends of the groove 240 in Fig. 5, which are formed after the groove 240 is made on the first insulating layer 251. The two protrusions separate the groove 240 from the left and right two gaps 280, which can Prevent the flow range of the color resist from being too large after deposition, and flow from the groove 240 to the gap 280 next to it, resulting in a larger cross-section of the color resist overlap, because a color resist of one color can only transmit light of one color , when the color resists of the two colors overlap, the light will not pass through and play the role of shading. Therefore, in order to prevent the overlapping area 230 from having a large cross-sectional area, the bumps 290 at both ends of the groove 240 are deliberately reserved to limit the color. If the area of flow resistance is too large, the cross-sectional area of the overlapping region 230 becomes larger, resulting in a decrease in the aperture ratio of the display panel 100 . Specifically, the second metal layer 270 is the gate line, and the second insulating layer 252 is the gate insulating layer 250 .

As shown in FIG. 6, as another embodiment of the present application, a method for manufacturing an array substrate 200 is disclosed, including steps:

S1: forming a substrate;

S2: forming grooves on the substrate;

S3: forming a color-resist layer containing a plurality of color-resistors on the groove and overlapping edges of the color-resistors;

Wherein, edges of adjacent color resists overlap to form an overlapping area, and the groove is disposed below the overlapping area.

It should be noted that the limitations of the steps involved in this plan are not considered as limiting the order of the steps without affecting the implementation of the specific plan. The steps written in the front can be executed first. It can also be performed later, or even at the same time, as long as the solution can be implemented, it should be considered as belonging to the protection scope of the present application.

The technical solution of the present application can be widely used in various display panels, such as twisted nematic (TwistedNematic, TN) display panels, in-plane switching (In-Plane Switching, IPS) display panels, vertical alignment (Vertical Alignment, VA) Display panels, multi-quadrant vertical alignment (Multi-Domain Vertical Alignment, MVA) display panels, of course, can also be other types of display panels, such as organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panels, all of which can be applied to the above Program.

The above content is a further detailed description of the present application in conjunction with specific optional implementation modes, and it cannot be deemed that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, some simple deduction or substitutions can be made without departing from the concept of this application, which should be deemed to belong to the protection scope of this application.

Claims (10)

1. a kind of array substrate characterized by comprising

Substrate；

Color blocking layer, over the substrate, the color blocking layer includes multiple color blockings for setting, and shape is arranged in the adjacent color blocking imbricate At overlay region；And

Groove is arranged below the overlay region.

2. a kind of array substrate as described in claim 1, which is characterized in that the array substrate includes insulating layer, described exhausted Edge layer is arranged between the color blocking layer and the substrate, and the groove is arranged on the insulating layer, the slot opening court To the overlay region.

3. a kind of array substrate as claimed in claim 2, which is characterized in that the insulating layer includes the first insulating layer and second Insulating layer, first insulating layer are arranged between the second insulating layer and the color blocking layer, and the groove is arranged described On first insulating layer.

4. a kind of array substrate as claimed in claim 3, which is characterized in that first insulating layer and the second insulating layer Material it is different.

5. a kind of array substrate as claimed in claim 2, which is characterized in that the insulating layer includes the first insulating layer and second Insulating layer, first insulating layer are arranged between the second insulating layer and the color blocking layer, and the groove is arranged described In second insulating layer.

6. a kind of array substrate as claimed in claim 5, which is characterized in that the array substrate includes the first metal layer, institute It states the first metal layer to be arranged between first insulating layer and the second insulating layer, and the position pair with the overlay region It answers, the groove is arranged in the second insulating layer above the first metal layer.

7. a kind of array substrate as claimed in claim 6, which is characterized in that the array substrate includes second metal layer, institute It states second metal layer to be arranged between the substrate and the second insulating layer, and corresponding with the color blocking in the color blocking layer；

Contain a notch between the groove and the adjacent second metal layer；

It is separated between the groove and the notch by convex block.

8. a kind of array substrate as described in claim 1, which is characterized in that the top of the overlay region and the color blocking layer Top is concordant.

9. a kind of production method of array substrate, which is characterized in that comprising steps of

Form substrate；

Groove is formed over the substrate；And

It is formed on the groove and contains multiple color blockings, and the color blocking layer of the color blocking imbricate；

Wherein, the imbricate of the adjacent color blocking forms overlay region, and the groove is arranged below the overlay region.

10. a kind of display panel, which is characterized in that including the array substrate as described in claim 1 to 8 any one, with institute State the color membrane substrates that array substrate is arranged oppositely, and the liquid crystal being arranged between the array substrate and the color membrane substrates Layer.