JPH06148415A - Manufacturing device for color filter - Google Patents

Abstract

PURPOSE:To provide the manufacturing device for the color filter which can reduce foreign matter electrostatically sticking on a substrate and a resin coating stuck on the substrate. CONSTITUTION:This device is equipped with a support 33 which mechanically support the substrate 31, having the resin coating 32 stuck on one surface directly or across another layer, on the reverse surface side of this substrate, a heat roller 38 which is arranged opposite the substrate support part of the support and rotates while heating and pressing the resin coating on the substrate surface, a means which supplies a thin resin film in between the resin coating on the substrate surface supported by the support and the heat roller, and a film peeling means which peels off the resin film stuck on the resin coating on the processed substrate surface; and the surface roughness of the support is set to >=Ra200mum, so the purpose is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter manufacturing apparatus used for a display panel such as a color liquid crystal display device, and more particularly to an improvement of a support for smoothing a resin film on a substrate. .

[0002]

2. Description of the Related Art Generally, the structure of a color liquid crystal display device is
A color filter is arranged on one side of the liquid crystal layer across the liquid crystal layer. As one of the methods for manufacturing this color filter,
There is a printing method. This printing method is a method of printing a colored ink dispersed in a pigment and a resin solvent in a dot shape or a stripe shape on the surface of a transparent glass substrate, and is a manufacturing method with low cost and high mass productivity.

That is, in this printing method, red (R), green (G), and blue (B) colored inks are printed on a glass substrate in a desired pattern by an intaglio offset printing method equipped with a pressure transfer blanket. To print in the shape of a screen. A cross section of the printed and dried state is shown in FIG. First, the glass substrate 31
A black light blocking layer BM is applied in a matrix on the surface of the. Next, the red color ink coating R is printed in stripes by moving the pressure-sensitive transfer blanket from one of the regions without the light blocking layer BM to the left in the same figure while rotating it. . Subsequently, a green colored ink film G and then a blue colored ink film B are printed on the adjacent region where the light blocking layer BM is not present. This is the resin coating 3
In the state where the primary color ink coating 32 is printed on the glass substrate 31, as shown in the figure, the coating surface has an arc shape within each color pixel. That is, the film thickness is minimum near the boundary of each colored ink film, and is maximum in the central portion.

If left as it is, color unevenness may occur, and a high quality color liquid crystal display cannot be obtained. Therefore, it is necessary to smooth the surface 32a of the colored ink coating 32 as shown in FIG. Therefore, conventionally, a step of performing a pressing process for smoothing the surface of the colored ink coating 32 has been indispensable.

[0005]

When this press treatment is performed, foreign matters such as human body peeled substances, chemical fibers such as dustproof wear, glass microcracks, metal fragments generated from machines and the like are deposited on the colored ink film 32. If the press treatment is applied to the colored ink while it is still attached, the foreign matter spreads out the colored ink, resulting in a white defect in that portion, which greatly reduces the yield.

The press treatment is generally carried out by placing a glass substrate on a heating platen which is a support and pressing it with a heating roller, but since the film surface of the micron order is pressed, In order to keep the pressure distribution uniform, the heating platen was processed flat with a fair degree of accuracy and with a small surface roughness and close to a mirror surface, so the heating platen and the glass substrate were given static electricity. It was still subjected to press processing. When the press treatment is performed by such a method, the foreign matter floating around the machine is attracted by static electricity, and a white defect is generated in that portion.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a color filter manufacturing apparatus capable of reducing foreign matters that are electrostatically adhered to a substrate and a resin film deposited on the substrate. And

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a support for mechanically supporting a back surface of a substrate having a resin coating adhered to one surface thereof directly or via another layer, and a support for the support. A heating roller arranged to face the substrate supporting portion of the body and provided to rotate while heating and pressing the resin coating on the substrate surface; a resin coating on the substrate surface supported by the support; and a heating roller. Means for supplying a thin resin film between the
An apparatus for manufacturing a color filter, comprising: a film peeling unit for peeling a resin film attached to a resin coating on the surface of a substrate to be processed, and having a surface roughness of a support set to Ra 200 μm or more.

[0009]

According to the present invention, the surface roughness is Ra 200 μm.
Since the above heating platen (support) is used, static electricity on this heating platen can be significantly suppressed. As a result, foreign substances attracted to the colored ink coating (resin coating) on the glass substrate vacuum-adsorbed on the heating platen are reduced, which can be useful for improving the yield. The surface roughness Ra is J
It is the center line average roughness specified by IS.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

The color filter manufacturing apparatus according to the present invention is constructed as shown in FIG. 1. Reference numeral 33 in the drawing is a fixed support, for example, a heating platen. In this embodiment, the heating platen 33 is The surface roughness is set to Ra 200 μm or more. On this heating platen 33, a glass substrate 31 having a colored ink coating 32, which is a resin coating, attached to one surface directly or via another layer is mechanically supported by vacuum suction. A heating roller 38 and a film peeling roller 48 are provided above the glass substrate 31 so as to be movable in the directions of arrows Fa and Fd, respectively. Heating roll
A roller 52 and a feed roller 45 forming a resin film supply section 45a are disposed diagonally above and to the left of the roller 38.
On the other hand, a pair of rollers 55 and 56 are arranged diagonally above and to the right of the film peeling roller 48, and then a film tension roller 53 is arranged so as to be movable in the direction of the arrow Fe. A film winding roller 47 is provided. Then, the feed roller 4 constituting the resin film supply unit 45a
The resin film 35 pulled out from No. 5 is passed through a roller 52 and stretched by a heating roller 38 and a film peeling roller 48, and further, rollers 55, 56 and a film tension roller 53.
The film is wound on the film winding roller 47 via the.

When smoothing a plurality of color filters, the heating platens 33, which are a plurality of supports to which the color filters are fixed, are placed on a belt conveyor that does not move up and down, one after another. The smoothing process may be performed by passing each heating platen 33 under the heating roller 38.

The material used for the heating platen 33 is not particularly limited as long as the surface roughness is specified, and commonly used Al, stainless steel, Fe or alloys thereof can be used. I can.

To smooth the colored ink coating 32 using this apparatus, first, as shown in the figure, the glass substrate 31 on which the colored ink coating 32 is printed is heated on the heating platen 3.
3 is vacuum-adsorbed with the colored ink coating 32 facing upward, and is constantly heated. The heating roller 38 and the film peeling roller 48 are located at the upper and 48a positions, respectively.
Then, the winding roller 47 is rotationally driven, and the resin film 35 advances to the right in the figure. Thereby, the unused release agent surface of the resin film 35 faces the colored ink film 32 to be smoothed. Then, the heating roller 3
8 and the film peeling roller 48 descend, and the colored ink coating 32 is crushed and smoothed by a predetermined pressure. Meanwhile, the resin film 35 travels in the right direction in the drawing together with the rotation of the heating roller 38. Appropriate tension is applied to the resin film 35 by the feed roller 45 and the take-up roller 47 to absorb the thermal expansion thereof.

Next, after the entire surface of the colored ink film 32 on the surface of the glass substrate 31 has been smoothed, the film peeling roller 48 is pushed up and the pulling roller 53 is moved from the original position 53a to the left in the drawing. Then, the resin film 35 is strongly pulled obliquely from one end of the colored ink coating surface to the other end on the heating roller side, and is instantaneously peeled off. Instead of using the pulling roller 53, the take-up roller 47 may be instantaneously strongly forwarded to apply a strong tension to the resin film 35 so that the resin film 35 is peeled off. The peeling speed of the resin film 35 is, for example, when the dimension from one end to the other end of the colored ink coating surface is 25 cm and the required time is in the range of 0.2 seconds to 1 second, the smoothed coloring ink coating surface is obtained. Good results were obtained without leaving streaky traces. Therefore, it is desirable that the peeling speed of the resin film 35 be in the range of 0.8 seconds to 4 seconds per 1 m.

In this way, after the resin film 35 has been peeled off, the pulling roller 53 is returned to its original position, and the heating roller 38 and the film peeling roller 48 are used.
Raise.

[0017]

According to the present invention, since the surface roughness of the heating platen is set to Ra 200 μm or more, the static electricity on the heating platen can be greatly suppressed, and as a result, the heating platen can be vacuumed. Foreign substances attracted to the adsorbed glass substrate and the resin coating on the glass substrate are reduced, which can contribute to an improvement in yield.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a color filter manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a color filter before a smoothing process.

FIG. 3 is a cross-sectional view showing a color filter after smoothing processing.

[Explanation of symbols]

31 ... Glass substrate, 32 ... Colored ink coating (resin coating), 33 ... Heating platen (support), 35 ... Resin film, 38 ... Heating roller, 45 ... Feed roller, 45a ... Resin film supply section , 47 ... Film winding roller, 48
... Roller for film peeling.

Claims (1)

[Claims] 1. A support body for mechanically supporting a back surface side of a substrate having a resin coating adhered to one surface thereof directly or through another layer, and a substrate support portion of the support member facing the substrate support portion. And a heating roller provided so as to rotate while heating and pressing the resin coating on the substrate surface, and a thin resin between the resin coating on the substrate surface supported by the support and the heating roller. In a color filter manufacturing apparatus comprising a means for supplying a film and a film peeling means for peeling a resin film adhering to the resin coating on the surface of the substrate to be treated, the surface roughness of the support is Ra 200 μm. An apparatus for manufacturing a color filter, which is configured as described above.