WO2019075900A1

WO2019075900A1 - Liquid crystal display panel and fabrication method therefor

Info

Publication number: WO2019075900A1
Application number: PCT/CN2017/117234
Authority: WO
Inventors: 潘于新
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2017-10-17
Filing date: 2017-12-19
Publication date: 2019-04-25
Also published as: CN107728389A

Abstract

A liquid crystal display panel, comprising an upper substrate and a lower substrate; the upper substrate or the lower substrate comprises a color resistance layer (1) and a black matrix (2) arranged between various color resistances of the color resistance layer (1); a spacer (3) is provided on the black matrix (2); and the spacer (3) comprises a cushion block (6) made of the same photo-resistance material as the color resistance layer (1) and an outer layer (7) provided outside the cushion block (6). A fabrication method for the liquid crystal display panel, wherein the fabrication of an upper substrate or a lower substrate comprises the following steps: providing a substrate; successively forming a black matrix (2) and a color resistance layer (1) on the substrate; and forming a spacer (3) in the process of forming the color resistance layer (1). Compared with the prior art, by fabricating a spacer (3) while fabricating a color resistance layer(1) on an upper substrate or a lower substrate, a half-tone or gray-tone photomask is omitted, ensuring the stability of the fabricating process, saving on cost and also being able to achieve accuracy in the fabricating process.

Description

Liquid crystal display panel and manufacturing method thereof

Technical field

The invention relates to a liquid crystal display panel technology, in particular to an array substrate and a display panel.

Background technique

The fabrication of a TFT-LCD (Thin Film Transistor, Liquid Crystal Display, Liquid Crystal Display) is very complicated, and needs to be fabricated through an array substrate (TFT substrate), a color filter substrate (CF substrate), and respectively on the array substrate and the color filter substrate. After coating the PI (alignment film), after the PI coating is completed, the liquid crystal and the sealant are dropped on the array substrate or the color filter substrate, and the array substrate and the color filter substrate of the liquid crystal and the sealant are dropped, and after being cured by the sealant. Finish the production. In the process of aligning the array substrate and the color filter substrate, the accuracy of the group and the degree of shrinkage of the surface of the two substrate films may cause slight deviation between the upper and lower substrates (the upper substrate may be a color film substrate or a general one). The cover plate and the lower substrate are array substrates), so that light leakage is poor. The current solution is to control the accuracy of the group and control the shrinkage of the layers of the upper and lower substrates. This method sacrifices the monitoring production time of each site during the operation and cannot completely solve the light leakage problem.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a liquid crystal display panel and a manufacturing method thereof, thereby simplifying the process and saving cost.

The present invention provides a liquid crystal display panel comprising an upper substrate and a lower substrate, the upper substrate or the lower substrate comprising a color resist layer and a black matrix disposed between the color resists of the color resist layer, wherein the black matrix is provided with a spacer comprising a spacer made of the same photoresist material as the color resist layer and an outer layer disposed outside the spacer.

Further, the spacer includes a primary spacer and a secondary spacer, and the heights of the primary spacer and the secondary spacer are different.

Further, the main spacer is composed of a spacer made of a photoresist material having the same color resistance of two colors of the color resist layer and an outer layer disposed outside the spacer.

Further, the secondary spacer is made up of a spacer made of a photoresist material having the same color resistance as that of the color resist layer and an outer layer disposed outside the spacer.

The present invention also provides a method for fabricating a liquid crystal display panel, comprising the fabrication of an upper substrate, the fabrication of the upper substrate comprising the following steps:

Providing a substrate;

Forming a black matrix and a color resist layer on the substrate in sequence;

A spacer is simultaneously formed in the process of forming the color resist layer.

Further, simultaneously forming the spacer in the process of forming the color resist layer comprises:

Forming a first spacer on the black matrix while forming a color resistance of one of the colors;

Forming a second spacer on a portion of the first spacer while forming a color resistance of another color;

Making an outer layer outside the first spacer and the second spacer;

Wherein the first spacer and the outer layer of the second spacer are not formed to constitute the secondary spacer; the first spacer, the second spacer and the outer layer formed with the second spacer constitute the main spacer.

Further, the outer layer is made of a photoresist material for making spacers.

The present invention also provides a method for fabricating a liquid crystal display panel, comprising the fabrication of a lower substrate, the fabrication of the lower substrate comprising the following steps:

Providing an array substrate;

Forming a black matrix and a color resist layer sequentially on the array substrate;

Making an outer layer outside the first spacer and the second spacer;

Further, the outer layer is made of a photoresist material for making spacers.

Compared with the prior art, the invention makes spacers while fabricating the color resist layer on the upper substrate or the lower substrate, thereby eliminating the half-tone or gray-tone mask, ensuring process stability and cost saving. Can achieve the accuracy of the process.

DRAWINGS

Figure 1 is a schematic view of a first embodiment of the present invention;

2 is a schematic view showing the fabrication of a black matrix of the present invention;

Figure 3 is a schematic view of one of the spacers of the present invention;

Figure 4 is a schematic view of another spacer formed by the present invention;

Figure 5 is a schematic view showing the outer layer of the present invention outside the spacer;

Figure 6 is a plan view of the present invention;

Figure 7 is a schematic illustration of a second embodiment of the invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 1 and FIG. 6 , a liquid crystal display panel of the present invention includes an upper substrate and a lower substrate, and the upper substrate or the lower substrate includes a color resist layer 1 and a color resistance layer disposed between the color resist layers 1 . The black matrix 2 is provided with a spacer 3 on the black matrix 2, and the spacer 3 includes a spacer 6 made of the same photoresist material as the color resist layer and an outer layer 7 provided outside the spacer 6.

The spacer 3 includes a primary spacer 4 and a secondary spacer 5, the heights of the primary spacer 4 and the secondary spacer 5 being different, wherein:

The main spacer 4 is composed of a spacer 6 made of a photoresist material having the same color resistance of the two colors of the color resist layer 1, and an outer layer 7 provided outside the spacer 6;

The secondary spacer 5 is made up of a spacer 6 made of a photoresist material having the same color resistance as that of the color resist layer 1 and an outer layer 7 provided outside the spacer 6.

In the constitution of the primary spacer 4 and the secondary spacer 5, the color resistance of one of the colors is made of a photoresist of the same color of color resistance, for example:

The spacer 6 constituting the main spacer 4 is a first spacer 61 and a second spacer 62 made of a photoresist material having the same color resistance as red and blue color resistance; The spacer 6 is a first spacer 61 made of a photoresist material having the same color resistance as red. However, the present invention is not limited thereto, and the spacers may be formed by using color resists of other colors according to the fabrication of the color resist layer.

In the liquid crystal display panel described above, the outer layer 7 is made of a conventional photoresist material for forming spacers, and the light passing through the position of the outer layer 7 is 100%, and the fluidity of the photoresist and the spacer itself are utilized. The height difference is such that spacers of different heights are formed, and the outer layer 7 has a thickness of 2 to 4 um.

The manufacturing method of the liquid crystal display panel of the present invention comprises the following steps:

A black matrix 2 and a color resist layer 1 (shown in FIGS. 2, 3, and 4) are sequentially formed on the upper substrate or the lower substrate, and the black matrix 2 and the color resist layer 1 are fabricated by using the prior art. method;

The spacer 3 is simultaneously formed in the process of forming the color resist layer 1 (as shown in FIGS. 3 and 4).

Specifically, simultaneously forming the spacer 3 in the process of forming the color resist layer 1 includes:

Forming a first spacer 61 on the black matrix 2 while forming a color resistance of one of the colors;

Forming a second spacer 62 on a portion of the first spacer while forming a color resistance of another color;

An outer layer 7 (shown in Figure 5) is formed outside the first spacer 61 and the second spacer 62.

Wherein, the portion of the first spacer 61 and the outer layer 7 that are not formed with the second spacer 62 constitute the secondary spacer 5; the portion of the first spacer 61 and the second spacer 62 that are formed with the second spacer 62 and The outer layer 7 constitutes the main spacer 4.

The outer layer 7 is made of a photoresist material for making spacers. Specifically, the outer layer 7 is formed on the outer surface of the first spacer 61 and the second spacer 62 to apply a photoresist material for forming spacers on the first spacer 61 and the second spacer 62. a process of etching the photoresist material other than the first spacer 61 and the second spacer 62 to form an outer layer 7 outside the first spacer 61 and the second spacer 62; in the photolithography process, The light at the first pad 61 and the second pad 62 can pass 100%.

In the present invention, the upper substrate may be a color film substrate, the lower substrate may be a BOA substrate, when the upper substrate is a color film substrate, the lower substrate is a general TFT (thin film transistor) substrate; and when the lower substrate is a BOA substrate, the upper substrate As the cover glass, an ITO film is coated on the surface of the cover glass opposite to the lower substrate.

Embodiment 1:

The liquid crystal display panel of the first embodiment includes an upper substrate and a lower substrate, wherein the upper substrate is a color film substrate 100, and the lower substrate is a prior art TFT (thin film transistor) substrate. Since both are prior art, only For the improvement of the present invention, the differences of the color filter substrate 100 will be described with reference to FIG.

As shown in FIG. 1 and FIG. 6 , the color filter substrate 100 includes a substrate 101 , a color resist layer 1 disposed on the substrate 101 , a black matrix 2 disposed between the color resists of the color resist layer 1 , and a spacer 3 . Wherein: the spacer 3 is disposed on the black matrix 2, where the spacer 3 is disposed in the prior art, and the position of the spacer is not limited herein; the spacer 3 includes the same photoresist material as the color resist layer. The prepared spacer 6 and the outer layer 7 disposed outside the spacer 6; the color filter substrate 100 further includes an ITO film layer (not shown), and the arrangement of the ITO film layer is the same as the existing arrangement. , do not give specific instructions here.

The main spacer 4 is composed of a spacer 6 made of a photoresist material having the same color resistance of the two colors of the color resist layer 1 and an outer layer 7 provided outside the spacer 6;

The manufacturing method of the liquid crystal display panel in the first embodiment includes: the fabrication of the upper substrate and the fabrication of the lower substrate, wherein the fabrication of the upper substrate comprises the following steps:

A substrate 101 is provided.

A black matrix 2 is formed on the substrate 101 (as shown in FIG. 2); specifically, a black photoresist material is coated on the substrate 101, and the black matrix 2 is formed by one photolithography process.

A color resist layer 1 is formed in a pixel region between the black matrices 2 (as shown in FIGS. 2, 3, and 4); specifically:

As shown in FIG. 2, a red photoresist material is coated, a red color resist is formed by a mask process, and a first spacer 61 is formed on the black matrix 2 at a position of the spacer 3; 3 is a primary spacer 4 and a secondary spacer 5;

As shown in FIG. 3, a green photoresist material is coated, and a green color resist is formed by a mask process;

As shown in FIG. 4, a blue photoresist material is coated, and a blue color resist is formed by a single mask process while forming a second on the first spacer 61 at the position of the main spacer 4 on the brown matrix 2. Pad 62;

As shown in FIG. 5, the outer layer 7 is formed outside the pad in which only the first spacer 61 and the first spacer 61 and the second spacer 62 are formed, and finally the secondary spacer 5 and the main spacer 4 are formed. Specifically, a photoresist material for forming a spacer is coated on the first spacer 61, the second spacer 62, and the color resist layer 1 and the black matrix 2, and the first spacer 61 is removed by a single mask process. The photoresist material other than the second spacer 62 is etched away to form the outer layer 7 outside the first spacer 61 and the second spacer 62.

The fabrication of the lower substrate is prior art and will not be described in detail herein.

Embodiment 2

As shown in FIG. 6 and FIG. 7 , in the liquid crystal display panel of the second embodiment, the lower substrate adopts a BOA substrate, and the BOA substrate includes: an array substrate, and the array substrate may include a data line, a scan line, a thin film transistor, and a pixel electrode. Etc., since the improvement in the second embodiment does not involve improvements such as data lines, scan lines, thin film transistors, and pixel electrodes, this part will not be described in detail herein. It is only necessary to know that the structure of the BOA substrate is no different from the prior art. .

The lower substrate includes an array substrate 200, a color resist layer 1, a black matrix 2 disposed between the color resists of the color resist layer 1, and a spacer 3, wherein the color resist layer 1 and the black matrix 2 are disposed on the array substrate 200. The spacer 3 is disposed on the black matrix 2, where the spacer 3 is disposed at a position prior to the prior art, and the position is not limited herein; the spacer 3 includes the same photoresist as the color resist layer A spacer 6 made of a material and an outer layer 7 provided outside the spacer 6.

The upper substrate 300 includes a cover glass 301 and an ITO film 302 coated on the cover glass.

The manufacturing method of the liquid crystal display panel in the second embodiment includes the fabrication of the upper substrate and the fabrication of the lower substrate, wherein the fabrication of the lower substrate includes the following steps:

An array substrate 200 is provided. The array substrate may include a data line, a scan line, a thin film transistor, a pixel electrode, and the like, and is not specifically limited herein.

A black matrix 2 is formed on the array substrate 200 (as shown in FIG. 2); specifically, a black photoresist material is coated on the array substrate 200, and the black matrix 2 is formed by one photolithography process.

The fabrication of the upper substrate includes:

Providing a glass cover plate 301;

An ITO film 302 is formed on the cover glass 301.

In the present invention, the lower substrate may also be a COA substrate. Here, the fabrication steps may be changed according to actual needs. The fabrication of the color resist layer and the black matrix may be replaced by the fabrication method of the second embodiment of the liquid crystal panel of the present invention.

In the manufacturing method of the present invention, the spacer is formed by a single photolithography process, and is formed by 100% exposure. Since the level of the photoresist at the pad position is different, the outer layer is formed outside the spacer, and finally a spacer is formed. This eliminates the need for a half-tone or gray-tone reticle to ensure process stability, cost savings and process accuracy.

While the invention has been shown and described with respect to the specific embodiments the embodiments of the embodiments of the invention Various changes in details.

Claims

A liquid crystal display panel comprising an upper substrate and a lower substrate, wherein: the upper substrate or the lower substrate comprises a color resist layer and a black matrix disposed between the color resists of the color resist layer, wherein the black matrix is provided with a spacer The spacer includes a spacer made of the same photoresist material as the color resist layer and an outer layer disposed outside the spacer.
The liquid crystal display panel according to claim 1, wherein the spacer comprises a main spacer and a sub spacer, and the heights of the main spacer and the sub spacer are different.
The liquid crystal display panel according to claim 2, wherein: said main spacer is composed of a spacer made of a photoresist material having the same color resistance as that of the color resist layer, and an outer layer provided outside the spacer. .
The liquid crystal display panel according to claim 2, wherein: said spacer is composed of a spacer made of a photoresist material having the same color resistance as that of the color resist layer, and an outer layer provided outside the spacer production.
A method for fabricating a liquid crystal display panel, comprising: fabricating an upper substrate, wherein: the fabricating the upper substrate comprises the following steps:

Providing a substrate;

Forming a black matrix and a color resist layer on the substrate in sequence;

A spacer is simultaneously formed in the process of forming the color resist layer.
The method of fabricating a liquid crystal display panel according to claim 5, wherein simultaneously forming the spacers in the process of forming the color resist layer comprises:

Forming a first spacer on the black matrix while forming a color resistance of one of the colors;

Forming a second spacer on a portion of the first spacer while forming a color resistance of another color;

Making an outer layer outside the first spacer and the second spacer;

Wherein the first spacer and the outer layer of the second spacer are not formed to constitute the secondary spacer; the first spacer, the second spacer and the outer layer formed with the second spacer constitute the main spacer.
The method of fabricating a liquid crystal display panel according to claim 6, wherein the outer layer is made of a photoresist material for forming a spacer.
A method for fabricating a liquid crystal display panel, comprising: fabricating a lower substrate, wherein: the fabricating the lower substrate comprises the following steps:

Providing an array substrate;

Forming a black matrix and a color resist layer sequentially on the array substrate;

A spacer is simultaneously formed in the process of forming the color resist layer.
The method of fabricating a liquid crystal display panel according to claim 8, wherein the simultaneously forming the spacers in the process of forming the color resist layer comprises:

Forming a first spacer on the black matrix while forming a color resistance of one of the colors;

Forming a second spacer on a portion of the first spacer while forming a color resistance of another color;

Making an outer layer outside the first spacer and the second spacer;

Wherein the first spacer and the outer layer of the second spacer are not formed to constitute the secondary spacer; the first spacer, the second spacer and the outer layer formed with the second spacer constitute the main spacer.
The method of fabricating a liquid crystal display panel according to claim 9, wherein the outer layer is made of a photoresist material for forming a spacer.