JPH0615224A - How to apply colored resin - Google Patents

Abstract

(57) [Summary] [Purpose] Regarding a method for applying a colored resin having fluidity,
The purpose is to make the resin film thickness uniform. [Structure] The substrate 2 is fixed to the rotating disc 1, the fluid colored resin droplets 4b are dropped on a plurality of positions on the surface of the substrate 2, and the rotating disc 1 is rotated to form a colored resin film 51 on the surface of the substrate 2. . The substrate 2 is fixed to the rotating disk 1, and the fluid coloring resin droplets 4b are continuously dropped on the surface of the substrate 2 while rotating the rotating disk 1 to form a colored resin film 51 on the surface of the substrate 2.
The substrate 2 is fixed to the rotating disk 1, and the fluid coloring resin dropping nozzle 3 is moved from the center of the substrate 2 to the outside or the opposite direction while rotating the rotating disk 1, and from the moving nozzle 3. The fluid colored resin droplets 4b are continuously dropped to form a colored resin film 51 on the surface of the substrate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a colored resin having fluidity, and more particularly to a method for applying a colored resin film having a uniform thickness to a glass substrate by spin coating to manufacture a color filter.

[0002]

2. Description of the Related Art As a method of forming a color filter in a liquid crystal display panel, there are an electrodeposition method, a printing method, a photolithography method and the like. The photolithography method is the best method for obtaining a pixel pattern accuracy and a uniform film thickness. The spin coating method is used for forming the photosensitive colored resin film in the method.

In a liquid crystal display panel, a panel substrate on which a color filter is formed has a black mask pattern formed on a glass substrate, and a red (R) pixel, a green (G) pixel,
Blue (B) pixels are sequentially formed by patterning, unevenness due to formation of a large number of three-color pixels is flattened by a top coat layer, and a transparent electrode is formed on the top coat layer.

The color pixel has a thickness of 1 to 2 μm.
Second pixel resin film after the pixel formation, and the first and second pixel films
The third pixel resin film after the pixel formation is applied on a substrate on which a large number of irregularities of 1 to 2 μm are formed.

FIG. 6 is an explanatory view of a conventional method for applying a colored resin, in which a glass substrate 2 is fixed to a rotary disk 1 and an appropriate amount of a fluid colored resin 4 is dropped from a dispenser nozzle 3 at the center of the glass substrate 2. After that, when the rotating disk 1 is rotated, the resin film 5 is formed on the surface of the glass substrate 2.

[0006]

FIG. 7 is an explanatory view of a problem of a colored resin film applied by a conventional method, (A) is a plan view of a resin film in which a circular thin portion called a great circle is formed, (B)
FIG. 4C is a cross-sectional view of a resin film having a great circle formed therein, and FIG. 8C is a plan view illustrating the spread of the resin film applied to the glass substrate having the first or first and second pixels formed therein.

In FIGS. 7A and 7B, 5a is a protrusion formed in the central portion of the resin film, and 5b is a circular thin portion formed on the resin film 5 and generally called a great circle. It is considered that the protrusions 5a and the great circles 5b, which are problematic because they are easily formed, become dry and become highly viscous at the opening of the nozzle 3 before the resin is dropped, and the resin affects them. That is, when the colored resin 4 is dropped onto the glass substrate 2, the first resin droplet 4a having high viscosity is wrapped with the subsequent dropped resin 4 as shown in FIG. The protrusion 5a remains in the center of the resin, and the other portion of the resin droplet 4a spreads with the resin 4. In other words, the resin 4 hinders the spreading and a great circle 5b is formed.

In FIG. 7C, the spread of the resin 4 dropped on the central portion of the glass substrate 2 is caused by the first pixel or the first and second pixels which are formed before that and which protrude in a regular arrangement. It is disturbed and spreads in a semicircular shape as shown in the figure, and the effect thereof is unevenness in the thickness of the resin film.

The projections 5a, the large circles 5b, and the semi-circular thickness unevenness described above contribute to the color unevenness of the liquid crystal display panel and deteriorate the display quality.

[0010]

FIG. 1 is an explanatory view of the basic constitution of the method of the present invention. In FIG. 1 (A), a glass substrate 2 is fixed to a rotating disk 1, colored resin droplets 4b having fluidity are dropped on a plurality of points on the surface of the glass substrate 2, and then the rotating disk 1 is rotated to rotate the glass. A resin film having a uniform thickness is formed on the surface of the substrate 2.

In FIG. 1 (B), the glass substrate 2 is fixed to the rotating disc 1, and while the rotating disc 1 is rotated, a plurality of resin droplets 4b are continuously dropped from the dispenser nozzle 3 onto the central portion of the glass substrate 2. A resin film having a uniform thickness is formed on the surface of the glass substrate 2.

In FIG. 1 (C), the glass substrate 2 is fixed to the rotary disc 1, the rotary disc 1 is rotated, and the dispenser nozzle 3 is moved outward from the center of the glass substrate 2. When the dispenser nozzle 3 drops a plurality of resin droplets 4b on the glass substrate 2 while moving,
A resin film having a uniform thickness is formed on the surface of the glass substrate 2.

In FIG. 1D, the glass substrate 2 is fixed to the rotating disk 1, the rotating disk 1 is rotated, and the dispenser nozzle 3 is moved from the outside of the glass substrate 2 toward the center of the substrate 2. . When the dispenser nozzle 3 drops a plurality of resin droplets 4b onto the glass substrate 2 while moving, a resin film having a uniform thickness is formed on the surface of the glass substrate 2.

[0014]

In the above means, the method for forming a colored resin film described with reference to FIGS. 1 (A) and 1 (B) is a means for forming a resin film on a smooth substrate, and the resin dropped first from the nozzle Centrifugal force acts on the droplets without causing damage to the resin droplets dropped on other positions or the following resin droplets, and the droplets spread widely.

Accordingly, the protrusion 5a shown in FIGS. 7 (A) and 7 (B) is eliminated, and at the same time, even if a great circle which is a problem in the conventional method is formed, the great circle has a larger diameter than that of the conventional large circle 5b. Therefore, it is possible to spread the resin film outside a required region, for example, a region where pixels are formed.

In the above means, the method of forming the colored resin film described with reference to FIGS. 1 (C) and 1 (D) is the same as the method described with reference to FIGS. 1 (A) and 1 (B). Conventional projection 5 for the reason
At the same time as eliminating a and making the great circle harmless, resin is dropped while moving the nozzle in the radial direction of the rotating disk, so the effect of unevenness on the glass substrate surface is suppressed, and the spread of resin shown in Fig. 7 (C) is suppressed. It has the effect of eliminating unevenness.

[0017]

FIG. 2 is an explanatory view of the first embodiment of the method of the present invention,
FIG. 3 is a plan view of a second embodiment of the method of the present invention, FIG. 4 is an explanatory view of a third embodiment of the method of the present invention, and FIG. 5 is an explanatory view of a fourth embodiment of the method of the present invention.

In FIG. 2 (A), the glass substrate 2 is fixed to the rotating disk 1, and the colored resin droplets 4b having fluidity are dropped on a plurality of points on the surface of the glass substrate 2. Then, when the rotating disk 1 is rotated at a predetermined speed, a centrifugal force acts on the resin droplet 4b, and a resin film 51 having a uniform thickness is formed on the surface of the glass substrate 2 as shown in FIG. 2 (B). To be done.

In FIG. 3A, the glass substrate 2 is rotated by fixing the glass substrate 2 to the rotating disc 1 and rotating the rotating disc 1. Therefore, when a plurality of resin droplets 4b are continuously or intermittently dropped from the dispenser nozzle 3 to the central portion of the glass substrate 2 while rotating the glass substrate 2, centrifugal force acts on the dropped resin droplets 4b, and the glass substrate 2 A resin film 51 having a uniform thickness is formed on the surface of No. 2 as shown in FIG.

In FIG. 4 (A), the glass substrate 2 is fixed to the rotating disc 1, the rotating disc 1 is rotated, and the dispenser nozzle 3 located at the center of the glass substrate 2 drops the resin droplet 4b. The glass substrate 2 is moved toward the outside.

Then, centrifugal force acts on the dropped resin droplet 4b, and a resin film 51 having a uniform thickness is formed on the surface of the glass substrate 2 as shown in FIG. 4 (B). In addition, in the third embodiment of the method of the present invention described with reference to FIG. 4, when the first or first and second pixels are already formed on the glass substrate 2 and there is unevenness of about 2 μm, In order to reduce the influence of unevenness, it is desirable to suppress the drying of the resin liquid at the initial stage of resin application.

Therefore, the rotation speed of the rotary disk 1 is set to be slower than that during spin coating, and the dispenser nozzle 3 which moves while dropping the resin droplet 4b is separated from the center of the glass substrate 2 by a distance of about 1/3 of the required area of the resin film. After moving to
The rotation speed of the rotating disk 1 was switched to the high-speed rotation necessary for forming the resin film, and good results were obtained.

In FIG. 5 (A), the glass substrate 2 is fixed to the rotary disk 1, the rotary disk 1 is rotated, and the dispenser nozzle 3 located outside the glass substrate 2 is preferably the first resin droplet 4b. Is dropped to a position outside the glass substrate 2, and then the resin droplet 4b is dropped and moved toward the center of the glass substrate 2.

Then, a centrifugal force acts on the dropped resin droplet 4b, and a resin film 51 having a uniform thickness is formed on the surface of the glass substrate 2 as shown in FIG. 5 (B).

[0025]

As described above, according to the method of the present invention, it is possible to eliminate the protrusion formed in the central portion of the substrate in the conventional method, to make the great circle harmless, and to eliminate the influence of the uneven spread of the resin. The present invention has the effect of improving display quality when applied to the production of color filters for liquid crystal display panels.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a basic configuration of a method of the present invention.

FIG. 2 is an explanatory diagram of the first embodiment of the method of the present invention.

FIG. 3 is a plan view of a second embodiment of the method of the present invention.

FIG. 4 is an explanatory diagram of a third embodiment of the method of the present invention.

FIG. 5 is an explanatory diagram of a fourth embodiment of the method of the present invention.

FIG. 6 is an explanatory view of a conventional colored resin coating method.

FIG. 7 is an explanatory diagram of a problem of a colored resin film applied by a conventional method.

[Explanation of symbols]

 1 is a rotary disk for spin coating 2 is a substrate on which a colored resin film is formed 3 is a nozzle for dropping a fluid colored resin 4b is a fluid colored resin droplet 51 is a colored resin film

Claims (4)

[Claims] 1. A substrate (2) is fixed to a rotating disc (1), a fluid colored resin droplet (4b) is dropped on a plurality of locations on the surface of the substrate (2), and the rotating disc (1) is rotated. A method for applying a colored resin, characterized in that the colored resin film (51) is formed on the surface of the substrate (2). 2. A substrate (2) is fixed to a rotating disc (1), and a fluid colored resin droplet (4b) is continuously dropped on the surface of the substrate (2) while rotating the rotating disc (1). Then, the colored resin coating method is characterized in that the colored resin film (51) is formed on the surface of the substrate (2). 3. A nozzle for dropping a fluid coloring resin from a central portion of the substrate (2) outward while fixing the substrate (2) to the rotating disc (1) while rotating the rotating disc (1). (3) is moved, and a fluid colored resin droplet (4b) is continuously dropped from the moving nozzle (3), and a colored resin film (5) is formed on the surface of the substrate (2).
1. A method for applying a colored resin, which comprises forming 1). 4. A nozzle for dropping a fluid coloring resin from the outside of the substrate (2) toward the center while the substrate (2) is fixed to the rotating disc (1) while rotating the rotating disc (1). (3) is moved, and a colored resin droplet (4b) is continuously dropped from the moving nozzle (3) to form a colored resin film (51) on the surface of the substrate (2). Method of applying colored resin.