JPS5990818A - Manufacture of color filter - Google Patents

Abstract

PURPOSE:To execute an electrodeposition painting onto each electrode in different colors, and to form a fine pattern by painting each electrode separately in multi-color, by selecting an electrode by a conductive transparent thin film, which is provided on a transparent substrate, applying the voltage, and repeating the electrodeposition painting. CONSTITUTION:A stripe-like electrode 11 is formed by a conductive transparent thin film on a transparent substrate 10, a lead wire 12 is connected by selecting suitably, and thereafter, it is immersed into an electrodepositing paint containing resin, a pigment and other additives, and a direct current is made to flow by applying an electric field between said electrode and an opposed electrode 14. As a result, the resin which is dissolved or dispersed in the electrodepositing paint 13 becomes insoluble in water and is deposited on an object to be painted, namely, the electrode 11. Subsequently, the substrate 10 is drawn up from a bath 16, washed with water, and thereafter, the lead wire 12 is connected to an electrode selected suitably out of the electrodes 11 which are not painted, it is immersed into an electrodepositing paint containing different pigments, and other color is painted by electrodeposition. By repeating said process, painting layers of various colors are electrodeposited respectively on the electrodes, and a color filter is obtained.

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a color filter.

More specifically, the present invention relates to a method of manufacturing a color filter that can be applied to an electro-optical device using liquid crystal or the like to obtain a color display.

Conventionally, the manufacturing method for this type of color filter has been to use red, #J! , a colored layer was provided by screen printing a W dye, and a colored layer was provided using a photoringraph process as shown in FIG.

However, although the former method is relatively simple to manufacture, it has the disadvantage of making it difficult to form fine patterns, while the latter method allows for easy formation of fine patterns, but requires high manufacturing costs. The graphing process is required as many as four times, and as the pattern becomes finer, more accurate pattern alignment is required, making manufacturing difficult and resulting in high costs.

In order to solve these drawbacks, the present invention has developed a cuff with a fine pattern by repeatedly applying electrodeposition coating to a plurality of display electrodes provided on a transparent substrate in multiple colors. - The filter can be obtained at low cost.

Examples will be described in detail below.

Figures 2 and 3 show an embodiment of the present invention, in which a stofib-like structure is formed on a transparent substrate 10 such as Pyrex glass using a conductive transparent thin film such as In20B or To (fi, O, +8 nυ2). After forming the electrode 11 and connecting the lead wire 12 with an appropriate selection, it is immersed in an electrodeposition coating 13 containing resin, pigment, and other additives, and an electric field is applied between the opposite side and the electrode 14. to flow direct current.

There are anionic and cationic electrodeposition coatings,
Depending on the method, positive polarity (anionic electrodeposition coating) or negative polarity (cationic electrodeposition coating) is applied to the object to be coated.

When an electric field is applied, the resin dissolved or dispersed in the electrodeposition coating material (charged) moves toward the object to be coated (
In other words, near the electrode 11), hydrogen ions react with scrap metal ions (in the case of anionic electrodeposition coating) or hydroxyl group ions (in the case of cationic electrodeposition coating) released from the anode, making them insoluble in water and forming a coating on the object to be coated. It precipitates out. (FIG. 3, 15) Next, the substrate lO is lifted out of the bathtub 16, and after washing off the water-soluble thin layer sticking to the surface with water, an appropriate selection is made from the unpainted electrodes 11 and the IJ-do wires 12 are connected. Connect it and immerse it in an electrodeposition paint containing a different pigment to apply another color.

By repeating the above steps, a multicolored paint layer is electrodeposited on each electrode, heated to form a crosslinked coating film, and then a protective film layer is formed to complete the color filter.

According to the method of the present invention, in order to deposit the paint on the electrode, it is necessary to apply an N1 field to the electrode, and the paint will not be deposited on other electrodes to which no electric field is applied. Therefore, a color filter with a fine pattern can be obtained by simply making the electrode pattern finer, and there is no need to perform a photolithography process as in the conventional example, making manufacturing easier and lowering costs.

In addition, the deposited paint has electrical resistance, and as the paint film becomes thicker, the first flow will not flow, and the increase in film thickness will be automatically suppressed.As a result, the thickness of the paint film will be the same color. It is uniform on the electrode, and there is little occurrence of multicolored unevenness.

In the above embodiment, a stofib-shaped electrode was described, but the present invention can be applied as long as each electrode can be selected independently. For example, in the case of an active matrix system in which a switching element such as a TFT is connected to each pixel electrode, each electrode can be selected independently. A filter layer of any color can be provided on the pixel electrode.

As explained above, by using the present invention, it is possible to easily manufacture a color filter with a fine pattern, and by combining it with a matrix panel with a high multiplicity, it is possible to display not only color graphics but also full-color images. This will expand the field of application of electronic devices in each building, and also make it possible to install TVs such as TVs.

[Brief explanation of the drawing]

FIGS. 1α) to 1gl are drawings showing a conventional color filter manufacturing process 8. l...Φ...Glass substrate 2...Transparent electrode 3...Animal protein (Guriyu, gelatin, etc.) 4.5...ΦPhotomask 6...Photoresist 7.Fist -.Pigment 8...Protective layer 2. Figures 1 and 3 are drawings showing examples of the present invention. IO...Transparent substrate 11...ψ/electrode 12611 e Command lead wire 13...-〇Electrodeposition paint 14...Counter electrode 15...Electrodeposited coating]6・・１１−・Bathtub and above Applicant: Suwa Seikosha Co., Ltd. LLV Figure 2

Claims (1)

[Claims] The feature is that an electrode made of a conductive transparent thin film divided into multiple areas is provided on a transparent substrate, and each electrode is divided into 49 multi-colors by selectively applying a voltage to each electrode and repeating electrodeposition coating. A method for manufacturing a color filter.