CN114594625A - Display panel and manufacturing method thereof - Google Patents

Display panel and manufacturing method thereof Download PDF

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Publication number
CN114594625A
CN114594625A CN202210166719.7A CN202210166719A CN114594625A CN 114594625 A CN114594625 A CN 114594625A CN 202210166719 A CN202210166719 A CN 202210166719A CN 114594625 A CN114594625 A CN 114594625A
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China
Prior art keywords
groove
layer
display panel
protective layer
insulating layer
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Granted
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CN202210166719.7A
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Chinese (zh)
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CN114594625B (en
Inventor
戴复山
刘冰萍
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Spectroscopy & Molecular Physics (AREA)

Abstract

The invention discloses a display panel and a manufacturing method thereof, the display panel comprises a substrate base plate, an insulating layer, a protective layer, a display area and a non-display area surrounding the display area, wherein the protective layer comprises a first protective layer and a second protective layer, the barrier layer is positioned between the second protective layer and the first protective layer, the barrier layer comprises a plurality of hollow areas, an alignment film is positioned on one side of the protective layer far away from the substrate base plate, the display panel also comprises the display area and the non-display area surrounding the display area, the non-display area comprises at least one groove, the hollow areas are positioned in the grooves, the grooves penetrate through the protective layer, at least part of the grooves extend to the insulating layer, a first sub-groove in each groove comprises a first part and a second part, the first part is positioned on one side of the barrier layer far away from the substrate base plate, the second part is positioned on one side of the barrier layer near the substrate base plate, the maximum size of the second part is larger than the maximum size of the first part along a second direction, the maximum size of the second part is ensured that the alignment film can be broken at the groove when the alignment film is formed on the protective layer, prevent water vapor from entering and corroding peripheral circuits, and improve the reliability of the display panel.

Description

Display panel and manufacturing method thereof
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a manufacturing method thereof.
Background
With the continuous development of display technology, the application scenarios of display panels are also more and more extensive. In some application scenarios (e.g., vehicle-mounted display scenarios, outdoor scenarios, etc.) where the environment is harsh (high temperature or high humidity environment), the stability of the display panel in the high temperature and high humidity environment is particularly important.
However, in the practical application process, it is found that in a reliability (Reliable, RA) test of the display panel with the existing structure under a high-temperature and high-humidity condition, because the alignment film is difficult to be completely disconnected, it is difficult to completely block moisture from entering the display panel, and the moisture entering the display panel can corrode surrounding circuits and affect the display quality.
Therefore, how to completely disconnect the alignment film and prevent water vapor from entering the display panel to improve the display effect is a technical problem to be urgently solved by those skilled in the art.
Disclosure of Invention
In view of this, embodiments of the present invention provide a display panel and a method for manufacturing the same, in which at least a portion of the groove is disposed to extend to the insulating layer, and the structure of the groove is further optimized, so that the alignment film is ensured to be broken at the groove, and water vapor is prevented from entering the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
a substrate base plate;
the insulating layer is positioned on one side of the substrate base plate;
the protective layer is positioned on one side, away from the substrate base plate, of the insulating layer and comprises a first protective layer and a second protective layer, and the second protective layer is positioned on one side, away from the insulating layer, of the first protective layer;
a barrier layer located between the second protective layer and the first protective layer, the barrier layer comprising a plurality of hollowed-out areas;
the alignment film is positioned on one side of the protective layer far away from the substrate base plate;
the display panel further includes a display region and a non-display region surrounding the display region, the non-display region including at least one groove where the alignment film is broken;
along a first direction, the groove penetrates through the protective layer, at least part of the groove extends to the insulating layer, the groove comprises a first sub-groove located on the protective layer and a second sub-groove located on the insulating layer, the first sub-groove comprises a first part and a second part, the first part is located on one side, away from the substrate base plate, of the barrier layer, the second part is located on one side, close to the substrate base plate, of the barrier layer, the maximum size of the second part is larger than that of the first part, and the hollowed-out area is located in the groove;
the first direction is a direction perpendicular to the display panel, and the second direction is a direction in which the non-display area points to the display area.
In another aspect, based on the same inventive concept, an embodiment of the present invention provides a method for manufacturing a display panel, which is used for any one of the display panels provided in the present application; the method comprises the following steps:
providing a substrate base plate;
forming an insulating layer on one side of the substrate, and performing grooving treatment on the insulating layer to form a second sub-groove;
forming a first protective layer on the insulating layer;
the display panel further comprises a display area and a non-display area surrounding the display area, a barrier layer is formed on the first protective layer of the non-display area, and the barrier layer comprises a hollow-out area;
forming a second protective layer on the barrier layer;
performing grooving treatment on the first protective layer and the second protective layer corresponding to the hollowed-out area to form a first sub-groove, wherein the first sub-groove comprises a first part positioned on the first protective layer and a second part positioned on the second protective layer, and the first sub-groove is communicated with the second groove to form a groove;
providing an etching solution, and adjusting the shape of the groove by using the etching solution so that the maximum size of the second part is larger than that of the first part along a second direction;
and forming an alignment film on one side of the second protective layer, which is far away from the substrate base plate, wherein the alignment film is disconnected at the groove.
Compared with the related art, the display panel and the manufacturing method thereof provided by the embodiment of the invention at least realize the following beneficial effects:
the display panel and the manufacturing method thereof provided by the embodiment of the invention are characterized in that the non-display area is grooved, the groove comprises a first sub-groove positioned on the protective layer and a second sub-groove positioned on the insulating layer, the first sub-groove comprises a first part and a second part, the first part is positioned on one side of the barrier layer far away from the substrate, the second part is positioned on one side of the barrier layer close to the substrate, the groove penetrates through the protective layer along the first direction, at least part of the groove extends to the insulating layer, the depth of the groove can be effectively deepened, the alignment film positioned above the protective layer can be conveniently controlled to be disconnected at the groove, the subsequent hollow area of the barrier layer between the first protective layer and the second protective layer is arranged in the groove, namely the barrier layer extends into the groove, when the etching solution etches to the second part, the barrier layer enables the etching solution to etch the second protective layer along the second direction, the groove width of the second part is expanded, so that the alignment film can be cut off at the groove when being formed on the protective layer, the water vapor is prevented from entering the inside of the display panel to corrode circuits around the display panel, the reliability of the display panel is improved, and the display effect of the display panel is effectively guaranteed.
Meanwhile, the manufacturing method of the display panel provided by the embodiment of the invention can share a mask with the existing structure in the display panel when the groove and the barrier layer are formed, namely, can ensure that the alignment film can be disconnected at the groove when formed on the protective layer on the basis of not increasing the mask, thereby preventing water vapor from entering the interior of the display panel along with the alignment film to corrode the peripheral circuit of the display panel, realizing the effect of effectively preventing the water vapor from invading the interior of the display panel, improving the reliability of the display panel and effectively ensuring the display effect of the display panel.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a display panel in the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line N-N' of FIG. 2;
FIG. 4 is an enlarged view of a portion T of FIG. 3;
FIG. 5 is a further sectional view taken in the direction N-N' of FIG. 2;
FIG. 6 is a further sectional view taken in the direction N-N' of FIG. 2;
FIG. 7 is a further sectional view taken in the direction N-N' of FIG. 2;
FIG. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a display panel according to another embodiment of the present invention;
FIG. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view taken along line M-M' of FIG. 11;
FIG. 13 is a further sectional view taken in the direction N-N' of FIG. 2;
fig. 14 is a flowchart of a method for manufacturing a display panel according to an embodiment of the invention;
fig. 15 is a structural flow chart of a method for manufacturing a display panel according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the corresponding claims (the claims) and their equivalents. It should be noted that the embodiments provided in the embodiments of the present invention can be combined with each other without contradiction.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a display panel in the prior art, and is shown in fig. 1. The prior art provides a display panel 100, which includes a display area AA and a non-display area BB surrounding the display area AA, and further includes a substrate 00, and an insulating layer 01, a protective layer 02 and an alignment film 03 sequentially disposed on one side of the substrate 00, where the protective layer 02 at a position corresponding to the non-display area BB includes a groove 021, and the alignment film 03 is disposed on the protective layer 02, and in the research process, it is found that the alignment film 03 may be unbroken at the position of the groove 021, which results in unbroken reasons, on one hand, because the thickness of the protective layer 02 in the direction perpendicular to the substrate 00 is small, i.e., the depth of the groove 021 is small, which results in unbroken of the alignment film 03 at the position of the groove 021, on the other hand, because the slope of the sidewall of the groove 021 is gentle, which results in unbroken of the alignment film 03 at the position of the groove 021, and because the alignment film 03 is unbroken at the position of the groove 021, the water vapor enters the display panel 100 along with the alignment film 03 from the edge of the non-display area BB away from the display area AA, and the water vapor entering the inside of the display panel 100 may corrode the peripheral circuit at the position of the non-display area BB, resulting in abnormal display.
In order to solve the above technical problems, the present invention provides a display panel and a method for manufacturing the same. Embodiments of the display panel and the method for fabricating the same according to the present invention will be described in detail below.
Referring to fig. 2 to 4, fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, fig. 3 is a cross-sectional view taken along the direction N-N' in fig. 2, and fig. 4 is a partial enlarged view of T in fig. 3. The present embodiment provides a display panel 200 including: a base substrate 10; an insulating layer 20, the insulating layer 20 being located on one side of the substrate 10; the protective layer 30, the protective layer 30 is located on one side of the insulating layer 20 away from the substrate 10, the protective layer 30 includes a first protective layer 31 and a second protective layer 32, and the second protective layer 32 is located on one side of the first protective layer 31 away from the insulating layer 20; the barrier layer 40, the barrier layer 40 is located between the second protective layer 32 and the first protective layer 31, and the barrier layer 40 includes a plurality of hollow-out areas Q; the alignment film 50, the alignment film 50 is located on one side of the protection layer 30 far away from the substrate base plate 10; the display panel further includes a display area AA and a non-display area BB surrounding the display area AA, the non-display area BB including at least one groove W where the alignment film 50 is broken; in the first direction X1, the groove W penetrates through the protective layer 30, and at least a portion of the groove W extends to the insulating layer 20, the groove W includes a first sub-groove W1 located in the protective layer 30 and a second sub-groove W2 located in the insulating layer 20, the first sub-groove W1 includes a first portion W11 and a second portion W12, the first portion W11 is located on a side of the barrier layer 40 away from the substrate 10, the second portion W12 is located on a side of the barrier layer 40 close to the substrate 10, in the second direction X2, a maximum dimension of the second portion W12 is greater than a maximum dimension of the first portion W11, and the hollow-out region Q is located in the groove W; the first direction X1 is a direction perpendicular to the display panel 200, and the second direction X2 is a direction in which the non-display area BB points to the display area AA.
It is understood that the present embodiment provides the display panel 200 including the insulating layer 20, the protective layer 30 and the alignment film 50 disposed in sequence on one side of the substrate 10, and the groove W disposed in the non-display area BB, in order to ensure that the alignment film 50 is broken at the position of the groove W, the groove W is disposed along the first direction X1, the groove W penetrates through the protective layer 30, and at least a portion of the groove W extends to the insulating layer 20, the groove W includes a first sub-groove W1 located on the protective layer 30 and a second sub-groove W2 located on the insulating layer 20, the first sub-groove W1 includes a first portion W11 and a second portion W12, the first portion W11 is located on one side of the barrier layer 40 away from the substrate 10, and the second portion W12 is located on one side of the barrier layer 40 close to the substrate 10, compared with the prior art in which the groove is disposed only on the protective layer 30, the depth of the groove W can be effectively deepened, so that the alignment film 50 located above the protective layer 30 can be broken at the groove W, meanwhile, the barrier layer 40 may be disposed between the first protection layer 31 and the second protection layer 32 while deepening the groove W, where the barrier layer 40 includes a plurality of hollow-out regions Q, and the hollow-out regions Q are located in the groove W, that is, the barrier layer 40 extends into the groove W, so as to further optimize the structure of the groove W, when the etching solution is etched to the second portion W12, the barrier layer 40 causes the etching solution to etch the second protection layer 32 along the second direction X2, that is, the groove width of the second portion W12 is expanded, so that when the alignment film 50 is formed on the protection layer 30, the alignment film 50 flows into the groove W, on one hand, the alignment film 50 is cut off after flowing into the groove W due to deepening the groove W, on the other hand, the barrier layer 40 extends into the groove W, and the groove width of the second portion W12 is expanded below the barrier layer 40, so that the sidewall of the groove W forms a concave-convex structure, meanwhile, the gradient steepness of the side wall of the groove W is increased, so that the alignment film 50 can be cut off at the position of the second part W12 of the groove W when flowing into the groove W, and the alignment film 50 can be cut off at the position of the groove W when being formed on the protective layer 30, thereby preventing water vapor from entering the inside of the display panel 200 to corrode lines around the display panel 200, improving the reliability of the display panel 200, and effectively ensuring the display effect of the display panel 200.
In some alternative embodiments, shown in conjunction with fig. 2 and 5, fig. 5 is a further cross-sectional view in the direction N-N' of fig. 2. The display area AA of the display panel 200 provided in this embodiment includes a common electrode layer C, the common electrode layer C is located between the first protective layer 31 and the second protective layer 32, and the barrier layer 40 and the common electrode layer C are on the same layer.
The display area AA of the display panel 200 provided in this embodiment includes a common electrode layer C, and a common voltage is applied to the common electrode layer C to form an effective electric field with the pixel electrode P, so as to drive a liquid crystal (not shown) to rotate, thereby enabling the display panel 200 to display an image. In fig. 5, the pixel electrode P is only located on the side of the common electrode C away from the substrate 10, but not limited thereto, and may be located on the side of the common electrode C close to the substrate 10, and may be specifically configured according to the requirement of the actual display panel 200. The common electrode layer C is located between the first protective layer 31 and the second protective layer 32, and the first protective layer 31 and the second protective layer 32 can be used to prevent the common electrode layer C from being short-circuited with other adjacent film layers, which affects the display of the display panel 200. Because the alignment film 50 is located above the protection layer 30, the groove W is disposed at the position of the protection layer 30 corresponding to the non-display area BB, and the structure of the groove W is further optimized, the barrier layer 40 can be disposed in the film layer through which the groove W passes, so that the groove W expands in size in the film layer through which the groove W passes, thereby increasing the probability of disconnection of the alignment film 50 in the non-display area BB, the common electrode layer C is located between the first protection layer 31 and the second protection layer 32, and the groove W passes through the first protection layer 31 and the second protection layer 32, and further the barrier layer 40 and the common electrode layer C can be disposed in the same layer, the barrier layer 40 satisfies the condition of optimizing the groove W, the barrier layer 40 can make the groove width of the second portion W12 expand when the etching solution etches the second protection layer 32 along the second direction X2, and make the alignment film 50 flow into the groove W to be disconnected when the alignment film 50 is formed on the protection layer 30, the water vapor is prevented from entering the display panel 200 to corrode the circuits around the display panel 200, the reliability of the display panel 200 is improved, and the display effect of the display panel 200 is effectively ensured. On the other hand, the barrier layer 40 and the common electrode layer C are disposed on the same layer, and the barrier layer 40 does not need to be separately disposed, and the same process as the common electrode layer C is performed, so that the process of the display panel 200 can be simplified, and the cost can be saved.
Optionally, the barrier layer 40 and the common electrode layer C are made of the same material, and may be made of a transparent conductive material, such as an indium tin oxide semiconductor transparent conductive material. Due to the fact that the transparent conductive material is different from the protective layer 30 and the insulating layer 20 in material, the corrosion rates of the insulating layer 20, the protective layer 30 and the barrier layer 40 are different, and further when the etching solution etches to the second portion W12, the barrier layer 40 enables the etching solution to etch the second protective layer 32 along the second direction X2, namely the width of the groove of the second portion W12 is expanded, the structure of the groove W is optimized, and the alignment film 50 is convenient to break at the groove W.
In some alternative embodiments, continuing with fig. 2-4, the present implementation provides a display panel 200: the maximum dimension of the first portion W11 on the side away from the second portion W12 in the second direction X2 is greater than or equal to the maximum dimension of the second sub-groove W2 on the side away from the first portion W11.
It can be understood that, in the display panel 200 provided in this embodiment, along the second direction X2, the maximum dimension F1 of the side of the first portion W11 away from the second portion W12 is greater than or equal to the maximum dimension F2 of the side of the second sub-groove W2 away from the first portion W11, that is, the maximum dimension of the end of the opening of the groove W is greater than the maximum dimension of the end of the groove bottom of the groove W, so as to facilitate the manufacturing of the groove W. The present invention does not limit the difference between the maximum dimension of the first portion W11 on the side away from the second portion W12 and the maximum dimension of the second sub-groove W2 on the side away from the first portion W11, and it is sufficient to ensure that the side wall of the groove W is inclined outward, and the steeper the side wall of the groove W is inclined outward, the more easily the alignment film 50 is broken when flowing into the groove W when forming the alignment film 50 on the protection layer 30.
In some alternative embodiments, and as shown in continued reference to FIGS. 2 and 6, FIG. 6 is a further cross-sectional view taken in the direction N-N' of FIG. 2. In the display panel 200 provided in this embodiment, the display area AA includes a semiconductor layer POLY, a first metal layer M1, and a second metal layer M2 sequentially disposed on the substrate 10; the insulating layer 20 includes a first insulating layer 21 and a second insulating layer 22, the first insulating layer 21 is located between the semiconductor layer POLY and the first metal layer M1, the second insulating layer 22 is located between the first metal layer M1 and the second metal layer M2, the insulating layer 20 further includes a connection hole R, and the second metal layer M2 and the semiconductor layer POLY are electrically connected through the connection hole R; wherein, the second sub-groove W2 and the connecting hole R are in the same layer.
It is understood that the display panel 200 provided by the present embodiment includes a semiconductor layer POLY, a first metal layer M1, and a second metal layer M2 sequentially disposed on the substrate 10; the insulating layer 20 includes a first insulating layer 21 and a second insulating layer 22, the first insulating layer 21 is located between the semiconductor layer POLY and the first metal layer M1, and the second insulating layer 22 is located between the first metal layer M1 and the second metal layer M2, in order to electrically connect the second metal layer M2 and the semiconductor layer POLY, a connection hole R needs to be formed in the first insulating layer 21 and the second insulating layer 22, when the second metal layer M2 is formed, the connection hole R can be electrically connected with the semiconductor layer POLY, and since at least a portion of the groove W extends into the insulating layer 20, the second sub-groove W2 is located in the insulating layer 20, the second sub-groove W2 and the connection hole R are arranged in the same layer, and the second sub-groove W2 and the connection hole R are manufactured in the same process, which is beneficial to simplifying the process of the display panel 200 and saving cost.
In some alternative embodiments, shown in conjunction with fig. 2 and 7, fig. 7 is a further cross-sectional view in the direction N-N' of fig. 2. The display panel 200 provided in this embodiment further includes a buffer layer 60, the buffer layer 60 is located between the substrate 10 and the insulating layer 20, and at least a portion of the groove W extends to the buffer layer 60.
It can be understood that, in the display panel 200 provided in this embodiment, the buffer layer 60 is further included, the buffer layer 60 is located between the substrate 10 and the insulating layer 20, after the groove W sequentially penetrates through the protective layer 30 and the insulating layer 20, at least a part of the groove W extends to the buffer layer 60, the depth of the groove W in the first direction X1 can be further deepened, and further when the alignment film 50 is formed on the protective layer 30, the alignment film 50 flowing into the groove W is more easily broken in the groove W due to the increase of the depth of the groove W, so as to prevent water vapor from entering the inside of the display panel 200 to corrode a circuit around the display panel 200, improve the reliability of the display panel 200, and effectively ensure the display effect of the display panel 200.
In some optional embodiments, referring to fig. 8 to 10, fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, fig. 9 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and fig. 10 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. The display panel 200 provided in this embodiment: the grooves W comprise a first type groove Wa and a second type groove Wb; the first-type grooves Wa include a plurality of first grooves Wa1 arranged along a third direction, the plurality of first grooves Wa1 at least partially surround the display area AA, the second-type grooves Wb extend along the third direction, the second-type grooves Wb at least partially surround the display area AA, and the third direction intersects with the first direction X1 and the second direction X2 respectively; the non-display area BB includes the first-type groove Wa and/or the second-type groove Wb.
Fig. 8 only shows that the non-display area BB includes the first type of groove Wa, fig. 9 only shows that the non-display area BB includes the second type of groove Wb, and fig. 10 only shows that the non-display area BB includes the first type of groove Wa and the second type of groove Wb, where the number of the first type of groove Wa and/or the second type of groove Wb is not limited in the present invention, and may be set according to a space of the non-display area BB.
It is understood that the present embodiment provides the display panel 200: the grooves W include first-type grooves Wa and second-type grooves Wb, and the non-display area BB includes the first-type grooves Wa and/or the second-type grooves Wb. When the non-display area BB only includes the first-type grooves Wa, the first-type grooves Wa include a plurality of first grooves Wa1 arranged in the third direction, and the plurality of first grooves Wa1 at least partially surround the display area AA, the first-type grooves Wa belong to a square groove, belong to a plurality of small grooves that are dispersed, and are disposed around the display area AA, the first-type grooves Wa1 function to block the alignment film 50, and further may include a plurality of rows of the first-type grooves Wa such that the first grooves Wa1 in the plurality of rows of the first-type grooves Wa are staggered in a direction in which the non-display area BB is directed to the display area AA, and front projections of the first grooves Wa1 in the plurality of rows of the first-type grooves Wa1 are connected to each other to be disposed around the display area AA, so as to ensure that the non-display area BB also functions to block the alignment film 50 when only the first-type grooves Wa are disposed. When the non-display area BB only includes the second-type groove Wa, the second-type groove Wb belongs to a long groove, and extends around the display area AA to half-surround the display area AA, and the second-type groove Wb is provided to block the alignment film 50; in addition, the non-display area BB can be set to include the first type grooves Wa and the second type grooves Wb, when the non-display area BB includes two types of grooves, the number of the first type grooves Wa is not required due to the existence of the second type grooves Wb, and the first type grooves Wa and the second type grooves Wb are not limited, the first type grooves Wa can be set to be located on one side of the near display area AA, the second type grooves Wb can be set to be located on one side of the near display area AA, and the above can be adjusted according to actual requirements. Moreover, the invention does not limit the type of the groove W included in the non-display area BB, and the first type groove Wa or the second type groove Wb can be independently set, or both types can play a role of blocking the alignment film 50, and the specific type included in the non-display area BB can be adjusted according to the actual requirement of the display panel 200.
In some alternative embodiments, continuing with fig. 2, the present embodiment provides a display panel 200: the non-display region BB further includes a first region BB1, a second region BB2, a third region BB3, and a fourth region BB4 connected to one another in this order; the first region BB1 includes the driving chip IC, and along the first direction X1, the projection of the groove W and the first region do not overlap.
It can be understood that the non-display area BB of the display panel 200 provided in this embodiment further includes a first area BB1, a second area BB2, a third area BB3, and a fourth area BB4 connected to each other in sequence, wherein the first area BB1 is a lower frame area of the display panel 200, and includes a driver chip IC and some lines (not shown in the figure), since the lines are arranged relatively densely at the position of the first area BB1, and holes are dug at the line gaps to form grooves W, on one hand, the space is relatively narrow, the grooves are not easy to be prepared, on the other hand, the problem of disconnection of the lines is easily caused, and further, the grooves W can be arranged in the second area BB2, the third area BB3, and the fourth area BB4 with relatively few lines, which not only can be realized that the grooves W are partially arranged around the display area AA, and play a role of blocking the alignment film 50 to prevent moisture from entering the inside of the display panel 200 to corrode the lines around the display panel 200, thereby improving the reliability of the display panel 200, the display effect of the display panel 200 is effectively ensured, the influence on the circuit design at the lower frame position can be avoided, and the manufacturing is convenient.
In some alternative embodiments, referring to fig. 11 and fig. 12, fig. 11 is a schematic structural diagram of another display panel provided in an embodiment of the present invention, and fig. 12 is a cross-sectional view along direction M-M' in fig. 11. The display panel 200 provided in this embodiment: the second area BB2 and the fourth area BB4 are left and right frames, respectively, where the left and right frames are generally provided with traces such as a gate driving circuit (not shown in the figure) on a side close to the display area AA for controlling and driving the display of the display area AA pixels, and the side of the gate driving circuit away from the display area AA is provided with an esd device K and/or an esd trace, optionally, when the esd device K and/or the esd trace are arranged relatively close to the gate driving circuit, a plurality of grooves W may be provided on a side of the esd device K and/or the esd trace away from the display area AA, and a first type groove and/or a second type groove may be provided, and on a side of the esd device K and/or the esd trace close to the display area AA, because of being closer to the gate driving circuit and the display area AA, the space where the grooves W may be provided is insufficient, the second type of groove may be only provided to further block the alignment film 50, prevent water vapor from corroding peripheral circuits such as the gate driving circuit, and improve the display effect of the display panel 200.
In some alternative embodiments, shown in conjunction with fig. 2 and 13, fig. 13 is a further cross-sectional view taken in the direction N-N' of fig. 2. The display panel 200 provided in this embodiment: the non-display area BB further comprises a glue frame 70, and the projection of the groove W and the glue frame 70 at least partially overlap in the first direction X1.
It can be understood that the non-display area BB in the display panel 200 provided by the present embodiment further includes a glue frame 70, and the glue frame 70 is located at an edge position of the display panel 200 for encapsulating the display panel 200. The arrangement is along first direction X1, and the projection of recess W and gluey frame 70 at least partly overlap, can make full use of gluey frame 70 correspond the space of non-display area BB on first direction X, need not to increase the proportion of non-display area BB in display panel 200, simultaneously because the circuit that glues frame 70 corresponding position department and set up is less relatively, sets up recess W and can also reduce to dodge design such as walking the line in this position department, the preparation of being convenient for.
In some optional embodiments, referring to fig. 14 and fig. 15, fig. 14 is a flowchart of a manufacturing method of a display panel according to an embodiment of the present invention, and fig. 15 is a structural flowchart of the manufacturing method of the display panel according to the embodiment of the present invention. The present application provides a method for manufacturing a display panel, which is used to form the display panel described in any of the above embodiments, and includes:
step S1: providing a substrate base plate;
step S2: forming an insulating layer on one side of the substrate, and performing grooving treatment on the insulating layer to form a second sub-groove;
step S3: forming a first protective layer on the insulating layer;
step S4: the display panel further comprises a display area and a non-display area surrounding the display area, a barrier layer is formed on the first protective layer of the non-display area, and the barrier layer comprises a hollow-out area;
step S5: forming a second protective layer on the barrier layer;
step S6: grooving the first protective layer and the second protective layer corresponding to the hollowed-out area to form a first sub-groove, wherein the first sub-groove comprises a first part positioned on the first protective layer and a second part positioned on the second protective layer, and the first sub-groove is communicated with the second groove to form a groove;
step S7: providing an etching solution, and adjusting the shape of the groove by using the etching solution so that the maximum size of the second part is larger than that of the first part along the second direction;
step S8: and forming an alignment film on one side of the second protective layer, which is far away from the substrate, wherein the alignment film is disconnected at the groove.
It can be understood that, in the manufacturing method of the display panel provided in this embodiment, a substrate is provided, when an insulating layer is formed on the substrate, a groove is formed in the insulating layer to form a lower half portion of a groove, that is, a second sub-groove, a protective layer is formed on the insulating layer, and a barrier layer is formed between the first protective layer and the second protective layer, where the barrier layer includes a hollow area, and in a direction perpendicular to the substrate, an orthographic projection of the hollow area and the second sub-groove are at least partially overlapped, and a groove is formed in the protective layer by performing a groove digging process on the protective layer to form a first sub-groove, where the first sub-groove includes a first portion located on the first protective layer and a second portion located on the second protective layer, and the first sub-groove and the second sub-groove are communicated to form a groove for effectively deepening a depth of the groove, and compared with the prior art, deepening the depth of the groove can facilitate control an alignment film located above the protective layer to be broken at the groove, follow-up further optimizes the recess, can utilize etching solution to optimize the recess, because the fretwork area that sets up the barrier layer is located the recess, also extend the barrier layer to the recess in, when etching solution sculpture to second part, the barrier layer makes etching solution follow second direction sculpture second protective layer, expand the groove width of second part outward, can break off at the groove when further ensuring to form on the protective layer to join in marriage the membrane, prevent that steam from following to join in marriage the inside of membrane entering display panel and corroding circuit around the display panel, improve display panel's reliability, effectively guarantee display panel's display effect.
In some alternative embodiments, with reference to fig. 14 and fig. 15, in the manufacturing method of the display panel provided in this embodiment, the display region includes the common electrode layer, and the barrier layer and the common electrode layer are formed through a single mask.
In the manufacturing method of the display panel provided by this embodiment, after the common electrode layer is formed on the first protective layer, the second protective layer and the alignment film are continuously formed on the common electrode layer, in order to ensure that the alignment film can be disconnected in the non-display area, a groove needs to be formed in the film layer below the adjacent alignment film, where the groove can be provided with a barrier layer in the film layer through which the groove passes, so that the groove is subjected to size expansion in the film layer through which the groove passes, that is, the barrier layer and an etching solution are used to perform partial shape adjustment on the groove side wall, a concave-convex structure is formed at the groove side wall, and the steepness of the groove side wall is increased at the same time, the optimization of the groove structure is performed by adjusting the shape of the groove side wall, thereby increasing the disconnection probability of the alignment film in the non-display area. And the public electrode layer is located between first protective layer and the second protective layer, and the recess runs through first protective layer and second protective layer, and then can set up barrier layer and public electrode layer with the layer, the barrier layer satisfies the condition of optimizing the recess, the barrier layer extends to in the recess, when etching solution sculpture to second portion, the barrier layer makes etching solution when sculpture second protective layer along the second direction, expand the groove width of second portion outward, further ensure that the joining in marriage membrane that forms can break off at the groove on the protective layer, prevent that steam from following the inside of joining in marriage the membrane and getting into display panel and corroding circuit around the display panel, improve display panel's reliability, effectively guarantee display panel's display effect. On the other hand, the barrier layer and the common electrode layer are arranged on the same layer, and the barrier layer and the common electrode layer are formed through a mask, so that the mask is not required to be added for forming the barrier layer, the process of the display panel is simplified, and the cost is saved.
In some optional embodiments, with continued reference to fig. 14 and fig. 15, the method for manufacturing a display surface provided in this embodiment includes: forming a semiconductor layer on the substrate corresponding to the display region; forming a first insulating layer on one side of the semiconductor, which is far away from the substrate; forming a first metal layer on one side of the first insulating layer, which is far away from the substrate base plate; forming a second insulating layer on one side of the first metal layer far away from the substrate base plate; forming a connection hole in the first insulating layer and the second insulating layer, the second metal layer and the semiconductor layer being electrically connected through the connection hole; the second sub-groove and the connecting hole are formed through a mask.
It can be understood that, in the manufacturing method of the display panel provided in this embodiment, in order to deepen the depth of the groove, the groove is disposed to penetrate through the protective layer, and at least a part of the groove extends to the insulating layer, that is, the first sub-groove penetrates through the protective layer, the second sub-groove is located in the insulating layer, because the insulating layer is also located between the second metal layer and the semiconductor layer, in order to enable the second metal layer and the semiconductor layer to achieve electrical connection, a connection hole needs to be disposed in the insulating layer, the second sub-groove and the connection hole can be formed through one mask, a manufacturing process of the display panel is not increased while the deepening of the groove is achieved, a process flow is simplified, and cost is saved.
As can be seen from the foregoing embodiments, the display panel and the manufacturing method thereof provided in the embodiments of the present invention at least achieve the following beneficial effects:
the display panel and the manufacturing method thereof provided by the embodiment of the invention are characterized in that the non-display area is grooved, the groove comprises a first sub-groove positioned on the protective layer and a second sub-groove positioned on the insulating layer, the first sub-groove comprises a first part and a second part, the first part is positioned on one side of the barrier layer far away from the substrate, the second part is positioned on one side of the barrier layer close to the substrate, the groove penetrates through the protective layer along the first direction, at least part of the groove extends to the insulating layer, the depth of the groove can be effectively deepened, the alignment film positioned above the protective layer can be conveniently controlled to be disconnected at the groove, the subsequent hollow area of the barrier layer between the first protective layer and the second protective layer is arranged in the groove, namely the barrier layer extends into the groove, when the etching solution etches to the second part, the barrier layer enables the etching solution to etch the second protective layer along the second direction, the groove width of the second part is expanded, so that the alignment film can be cut off at the groove when being formed on the protective layer, the water vapor is prevented from entering the display panel and corroding circuits around the display panel, the reliability of the display panel is improved, and the display effect of the display panel is effectively guaranteed.
Meanwhile, the manufacturing method of the display panel provided by the embodiment of the invention can share a mask with the existing structure in the display panel when the groove and the barrier layer are formed, namely, on the basis of not increasing the mask, the alignment film formed on the protective layer can be ensured to be disconnected at the groove, so that water vapor is prevented from entering the interior of the display panel along with the alignment film to corrode the peripheral circuit of the display panel, the effect of effectively preventing the water vapor from invading the interior of the display panel is realized, the reliability of the display panel is improved, and the display effect of the display panel is effectively ensured.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A display panel, comprising:
a substrate base plate;
the insulating layer is positioned on one side of the substrate base plate;
the protective layer is positioned on one side, away from the substrate base plate, of the insulating layer and comprises a first protective layer and a second protective layer, and the second protective layer is positioned on one side, away from the insulating layer, of the first protective layer;
a barrier layer located between the second protective layer and the first protective layer, the barrier layer comprising a plurality of hollowed-out areas;
the alignment film is positioned on one side of the protective layer far away from the substrate base plate;
the display panel further includes a display region and a non-display region surrounding the display region, the non-display region including at least one groove where the alignment film is broken;
along a first direction, the groove penetrates through the protective layer, at least part of the groove extends to the insulating layer, the groove comprises a first sub-groove located on the protective layer and a second sub-groove located on the insulating layer, the first sub-groove comprises a first part and a second part, the first part is located on one side, away from the substrate base plate, of the barrier layer, the second part is located on one side, close to the substrate base plate, of the barrier layer, the maximum size of the second part is larger than that of the first part, and the hollowed-out area is located in the groove;
the first direction is a direction perpendicular to the display panel, and the second direction is a direction in which the non-display area points to the display area.
2. The display panel according to claim 1, wherein the display region includes a common electrode layer between the first protective layer and the second protective layer;
the barrier layer and the common electrode layer are on the same layer.
3. The display panel according to claim 1, wherein a maximum dimension of the first portion on a side away from the second portion in the second direction is greater than or equal to a maximum dimension of the second sub-groove on a side away from the first portion.
4. The display panel according to claim 1, wherein the display region comprises a semiconductor layer, a first metal layer, and a second metal layer sequentially disposed on a substrate base plate;
the insulating layer comprises a first insulating layer and a second insulating layer, the first insulating layer is positioned between the semiconductor layer and the first metal layer, the second insulating layer is positioned between the first metal layer and the second metal layer, the insulating layer further comprises a connecting hole, and the second metal layer is electrically connected with the semiconductor layer through the connecting hole;
wherein the second sub-groove and the connecting hole are in the same layer.
5. The display panel of claim 1, further comprising a buffer layer between the substrate base plate and the insulating layer, at least a portion of the groove extending to the buffer layer.
6. The display panel according to claim 1, wherein the grooves include a first type groove and a second type groove;
the first type grooves comprise a plurality of first grooves arranged along a third direction, the plurality of first grooves at least partially surround the display area, the second type grooves extend along the third direction, the second type grooves at least partially surround the display area, and the third direction is respectively intersected with the first direction and the second direction;
the non-display area includes the first type groove and/or the second type groove.
7. The display panel according to claim 6, wherein the non-display region further comprises a first region, a second region, a third region, and a fourth region which are sequentially connected to each other;
the first region comprises a driving chip, and along the first direction, the projection of the groove and the first region are not overlapped.
8. The display panel according to claim 1, wherein the non-display area further comprises a glue frame, and a projection of the groove and the glue frame at least partially overlap in the first direction.
9. A method for manufacturing a display panel according to any one of claims 1 to 8, comprising:
providing a substrate base plate;
forming an insulating layer on one side of the substrate, and performing grooving treatment on the insulating layer to form a second sub-groove;
forming a first protective layer on the insulating layer;
the display panel further comprises a display area and a non-display area surrounding the display area, a barrier layer is formed on the first protective layer of the non-display area, and the barrier layer comprises a hollow-out area;
forming a second protective layer on the barrier layer;
performing grooving treatment on the first protective layer and the second protective layer corresponding to the hollowed-out area to form a first sub-groove, wherein the first sub-groove comprises a first part positioned on the first protective layer and a second part positioned on the second protective layer, and the first sub-groove is communicated with the second groove to form a groove;
providing an etching solution, and adjusting the shape of the groove by using the etching solution so that the maximum size of the second part is larger than that of the first part along a second direction;
and forming an alignment film on one side of the second protective layer, which is far away from the substrate base plate, wherein the alignment film is disconnected at the groove.
10. The method of claim 9, wherein the display region comprises a common electrode layer, and the barrier layer and the common electrode layer are formed by a single mask.
11. The method for manufacturing a display panel according to claim 9, comprising:
forming a semiconductor layer on the substrate corresponding to the display region;
forming a first insulating layer on one side of the semiconductor, which is far away from the substrate base plate;
forming a first metal layer on one side of the first insulating layer, which is far away from the substrate base plate;
forming a second insulating layer on one side of the first metal layer far away from the substrate base plate;
forming a connection hole in the first insulating layer and the second insulating layer, the second metal layer and the semiconductor layer being electrically connected through the connection hole;
the second sub-groove and the connecting hole are formed through a mask.
CN202210166719.7A 2022-02-23 2022-02-23 Display panel and manufacturing method thereof Active CN114594625B (en)

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