JP2576668B2 - Repair liquid for repairing fine colored patterns - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a correction liquid for repairing a defective pattern portion such as a pinhole or a chip on a finely colored pattern such as a color filter for an LCD (liquid crystal display).

(Related Art) Conventionally, an aqueous solution soluble in water or alcohol has been used as a correction liquid for repairing a coloring pattern of a color filter, and is quick-drying in terms of workability. Therefore, due to the large surface tension and rapid drying, it is necessary to repair a fine colored pattern at a defective pattern,
When the correction liquid is dropped or applied, the applied correction liquid swells and dries as it is, so that the color film of the correction pattern becomes thicker than the color film of the normal pattern, causing a step. In general, it is necessary to maintain a uniform thickness of the color filter over the entire surface of the color filter, and the thickness of the normal color pattern is about 1.0 to 2.0 μm. Is repaired using a conventional correction fluid, the pattern of the repaired part may be 4 μm depending on the repair method.
The film thickness may be more than the above.

(Object of the Invention) In the present invention, when a defective pattern portion of a fine colored pattern such as a color filter is repaired by filling with a correction liquid, a large step is generated in the film thickness between the normal colored pattern and the colored pattern at the repaired portion. The purpose is to be able to repair without any repairs.

(Constitution of the Invention) The present invention relates to a repair solution for repairing a finely colored pattern, comprising a coloring material, a binder composed of polyvinyl alcohol, a drying inhibitor, a viscosity modifier, an antifoaming agent, and an appropriate amount of an aqueous solvent. A colorant of 1 to 15 parts, a binder of 30 to 70 parts of polyvinyl alcohol, a drying inhibitor of 5 to 15 parts of butyl carbitol, a viscosity modifier of 20 to 40 parts of ethylene glycol, 0.5 It is a correction solution for repairing a finely colored pattern, comprising -2.0 parts of a defoaming agent by a surfactant and an appropriate amount of an aqueous solvent.

(Effect of the Invention) In the present invention, since a viscosity adjusting agent such as ethylene glycol and a drying inhibitor such as butyl carbitol are mixed in the correction fluid, the viscosity is higher than that of the conventional correction fluid,
In addition, the surface tension can be appropriately reduced, and the drying can be appropriately delayed. Therefore, wetting of the repair pattern becomes better, the swelling of the repair station attached to the repair portion can be reduced as compared with the conventional case, and the repair solution swells in the repair portion by dropping and applying the repair solution as in the conventional case. It is possible to repair the pinholes and chips of the finely colored pattern relatively flat and satisfactorily, without drying and solidifying immediately in the state.
In addition, the drying property is such that the quick drying property is not extremely reduced as compared with the conventional correction liquid, and the workability is not affected.

The correction fluid of the present invention is prepared so that the surface tension can be appropriately obtained, and is viscous, so that the correction fluid spreads excessively more than necessary, and a bleeding phenomenon of the liquid other than at the repair location may occur. In addition, the repair can be performed without causing a large step at a repair portion having a minute pinhole or a chip.

(Examples) The present invention will be described in detail according to examples.

The correction liquid of the present invention is prepared by adding three primary colors of an addition method used for a coloring pattern such as a color filter, for example, each color pigment having a color tone to be repaired such as blue (B), green (G), and red (R), It is mixed with a binder made of polyvinyl alcohol dissolved by an alcohol solvent such as isopropyl alcohol. A small amount of butyl carbitol as a drying inhibitor and a surfactant as an antifoaming agent are added thereto, and an appropriate amount of pure water or / and an alcohol as an aqueous solvent is added as a diluent.
Note that a dye can be used as the coloring material.

Appropriate allowable values in the present invention for the composition ratio of the correction fluid of the present invention are shown below.

<Allowable value> ・ Coloring agent 1-15 parts of pigment and dye ・ Binder polyvinyl alcohol 30-70 parts ・ Aqueous solvent water 0-50 parts Alcohol 5-30 parts ・ Viscosity modifier Ethylene glycol 20-40 parts (or cyclohexanol) -Drying inhibitor butyl carbitol 5 to 15 parts-Antifoaming agent (antifoaming, stringing prevention) Surfactant 0.5 to 2.0 parts However, in the present invention, the present invention is not necessarily limited to the above-mentioned allowable value. The amount of the colorant is appropriately increased or decreased according to the required spectral curve.

Next, an example of the composition ratio of the correction fluid in the present invention is shown below.

<Example 1> Colorant Color pigment (average particle size 2 μm) 6.4 parts ((B) or (G) or (R)) Binder polyvinyl alcohol 53.4 parts Aqueous solvent isopropyl alcohol 10 parts Water 29.5 parts Defoaming Agent Surfactant (SF-170C Gokyo Pharmaceutical Co., Ltd.) 0.7 parts Viscosity modifier Ethylene glycol 30 parts (or cyclohexanol) Drying inhibitor Butyl carbitol 10 parts <Example 2> Colorant Color pigment 10 parts Binder Polyvinyl alcohol 55 parts ・ Aqueous solvent isopropyl alcohol 10 parts Water 25 parts ・ Defoaming agent Surfactant (manufactured by SF-170C Gokyo Chemical) 0.7 parts ・ Viscosity modifier cyclohexanol 35 parts ・ Drying inhibitor butyl carbitol 5 parts (Effects of the Invention) The correction liquid of the present invention is a correction liquid for repairing a fine colored pattern such as a color filter, and is used for repairing a repaired part. The film thickness can be repaired to be relatively flat without causing a step to be produced between the film thickness of the normal coloring pattern and the film thickness being extremely thickened, and the repair of the pattern of a minute portion can be performed. It is effective for

Claims (1)

(57) [Claims] 1. A repairing solution for repairing a finely colored pattern, comprising a coloring material, a binder comprising polyvinyl alcohol, a drying inhibitor, a viscosity modifier, an antifoaming agent, and an appropriate amount of an aqueous solvent. Parts of a coloring agent, a binder composed of 30 to 70 parts of polyvinyl alcohol, a drying inhibitor of 5 to 15 parts of butyl carbitol, and a viscosity modifier of 20 to 40 parts of ethylene glycol, and 0.5 to 2.0 parts of A repair solution for repairing a finely colored pattern, comprising a defoaming agent made of a surfactant and an appropriate amount of an aqueous solvent.