KR20000021037A - Method for fabricating black matrix for liquid crystal display - Google Patents

Abstract

PURPOSE: A method for fabricating a black matrix for a liquid crystal display is provided to reduce process steps by forming a black matrix having an intermittent pattern to use a mask for a patterned black matrix and to scan a laser beam. CONSTITUTION: A method for fabricating a black matrix for a liquid crystal display comprises the steps of: preparing a transparent substrate(11); adhering a film(31) for a black matrix formation on an upper part of the transparent substrate; installing a mask(32) for a black matrix formation having a pattern of an intermittent black matrix on the upper part of the film; and scanning a laser beam on the mask to form a black matrix on the transparent substrate. In the step of forming the black matrix, the laser beam is continuously scanned on the mask so as to pass through a portion except the pattern of the intermittent black matrix, so that the black matrix is formed on the substrate.

Description

Formation method of black mattress for liquid crystal display

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a black mattress, and more particularly, to a method of manufacturing a black mattress for liquid crystal display, in which the method of forming a black mattress on a substrate is improved.

In general, color filters used in color LCDs can be classified into various types such as dyeing color filters, pigment dispersion color filters, printing color filters, and electrodeposition color filters depending on the manufacturing method.

The basic structure of the color filter includes a transparent substrate, a black mattress, a color filter layer, a transparent conductive film, and the like. Specifically, the glass is mainly used for the transparent substrate, the thickness is about 0.5 to 1 millimeter. Although black chromium is the mainstream metal chromium, low reflection and low cost are required in recent years, and the type which disperse | distributes pigments, such as carbon, is mass-produced in part. The color filter layer has shifted from the dye type to the pigment type, and has become a color filter excellent in resistance. In addition, a protective film and a transparent conductive film are formed on an upper surface of the color filter layer. The latter may be formed and patterned as necessary. Indium tin oxide (ITO) is used for the transparent conductive film. Representative arrangements of color filters include stripe type, triangle type and mosaic type.

In the conventional method of manufacturing a color filter, a transparent substrate is provided, and a black mattress is formed on a substrate in a predetermined pattern. Subsequently, a red, green, and blue color filter layer is formed between the black mattresses, and a protective film and a transparent conductive film are laminated thereon.

Here, the black mattress serves to prevent light incident on the TFT, suppress light loss from outside the effective area, and improve display characteristics. A photolithography process is mentioned as such a black mattress patterning system. That is, the glass substrate is cleaned and subjected to etching and peeling to form exposure, development, and patterned black mattress.

Recently, a black mattress is formed by a laser transfer method. A laser transfer method is a dry process in which a pigment applied to a film is heated by a laser to be transferred onto a glass substrate. Therefore, it is very advantageous in terms of cost reduction and shortening of the number of manufacturing processes.

However, since the black mattress exists in various patterns, it is mainly formed by the photolithography process. This is because the laser transfer method adopts a method of continuously scanning on a substrate with an oscillated laser beam, and therefore it is impossible to apply to a black mattress having an intermittent pattern except in the case of stripe type. Therefore, even in the case of a black mattress having a pattern of any form, it is required to improve the method so that it can be formed by the laser transfer method.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method of manufacturing a black mattress for liquid crystal display, in which a method is improved to form a black mattress having an intermittent pattern on a substrate by a laser transfer method. There is a purpose.

1 is a cross-sectional view showing a conventional color filter,

2 is a plan view of the black mattress of FIG.

3A is a cross-sectional view illustrating that the black mattress of FIG. 2 is formed;

3B is a cross-sectional view illustrating a state after the black mattress of FIG. 2 is formed.

<Brief description of symbols for the main parts of the drawings>

11. Substrate

12. Black Mattress

13. Color filter layer

14. Red color filter layer

15. Green color filter layer

16. Blue color filter layer

17. Shield

18. Transparent conductive film

In order to achieve the above object, a method of manufacturing a black mattress for a liquid crystal display according to an aspect of the present invention,

Preparing a transparent substrate;

Attaching a film for forming a black mattress to an upper surface of the transparent substrate;

Providing a black mattress forming mask having an intermittent black mattress pattern on the film; And

And forming a black mattress on the substrate by scanning a laser beam on the mask.

Here, in the step of forming the black mattress, the laser beam is continuously scanned on the black mattress forming mask, characterized in that the black mattress is formed on the substrate through a portion other than the pattern of the intermittent black mattress. .

Hereinafter, a method of manufacturing a black mattress for a liquid crystal display according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a color filter 10 according to the present invention.

Referring to the drawings, the color filter 10 is provided with a transparent glass substrate 11. On the glass substrate 11, a black mattress 12 such as chromium metal is formed. Red, green, and blue color filter layers 13 are formed between the black mattresses 12. That is, the red color filter forming material is exposed and developed only in a specific region to form the red color filter layer 14, and the above process is performed using the green color filter layer forming material and the blue color filter forming material. Each green color filter layer 15 and blue color filter layer 16 are formed in a specific area on the black mattress 12 repeatedly. A passivation layer 17 and a transparent conductive layer 18 are sequentially stacked on the black mattress 12 and the color filter layer 13.

Here, as shown in FIG. 2, a plurality of black mattresses 21 may be formed on the substrate 11 at predetermined intervals. The black mattress 21 having such an intermittent pattern can be patterned by the laser transfer method according to the features of the present invention.

That is, as shown in FIG. 3A, the black mattress forming film 31 is attached onto the substrate 11.

Subsequently, on the substrate 11 to which the film 31 is attached, a black mattress forming mask 32 having a pattern of the black mattress 21 is provided to be spaced apart by a predetermined interval. The black mattress forming mask 32 may be a glass component such as quartz or a transparent acrylic resin. In addition, the mask 32 maintains a distance of 100 to 150 micrometers from the substrate 11 to which the film 31 is attached.

Next, the laser beam 33a oscillated from the laser 33 is continuously scanned on the upper surface of the mask 32 on which the pattern of the black mattress 21 is formed. At this time, the portion having the shape of the intermittent black mattress 21 on the mask 32 is not transmitted through the laser beam 33a or is absorbed by the mask 32, and the black mattress 21 is The laser beam 33a is transmitted to portions other than the formed portion, thereby transferring the shape of the black mattress 21.

Subsequently, the film 31 and the black mattress forming mask 32 on the substrate 11 are removed to form the black mattress 31 having an intermittent pattern as shown in FIG. 3B.

After the black mattress 31 is formed, a color filter layer having a red, green, and blue color, a protective film, and a transparent conductive film is sequentially formed to complete the color filter.

As described above, the manufacturing method of the black mattress for liquid crystal display of the present invention is not formed by a photolithography process such as exposure, development, and etching, but scans a laser beam using a patterned black mattress forming mask. Therefore, by forming a black mattress having an intermittent pattern, there is an advantage in that the number of manufacturing steps is reduced, which is advantageous in terms of cost.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (2)

Preparing a transparent substrate; Attaching a film for forming a black mattress to an upper surface of the transparent substrate; Providing a black mattress forming mask having an intermittent black mattress pattern on the film; And And forming a black mattress on the substrate by scanning a laser beam on the mask. The method of claim 1, In the forming of the black mattress, the laser beam is successively scanned on the black mattress forming mask to pass the portions other than the intermittent black mattress pattern to form the black mattress on the substrate. Method for producing a black mattress for use.