JPS61292101A - Production of multi-color filter - Google Patents

Abstract

PURPOSE:To easily obtain the controllability and uniformity of the spectral characteristics of respective colors by repeating stages for bringing a dyeable transparent base for filters into tight contact with a master and heating the same from the master side to sublimate and transfer a dye element for each of the respective colors. CONSTITUTION:A photosensitive layer 1 contg. a sublimatable dye having the 1st color is provided on the base 2 and UV rays hnu are exposed thereto via a mask 4 having a prescribed shape. The dyeing master 6 having the 1st dye element 5 is obtd. if such photosensitive layer is developed by a developing soln. which can dissolve the uncured photopolymer. The base 7 for the filter is then brought into tight contact with the dye element 5 surface and is heated from the master 6 side, then the 1st element 5 is sublimated and transferred onto the base 7. The 2nd dye element 9 is similarly transferred onto the base 7 in a manner as not to overlap on the element 5'. The 3rd dye element 11 is further transferred on the base 7 for the filter so as not to overlap on the 1st element 5' and the 2nd element 9'. A non-dyeable resin soln. is finally coated on the dye element 5', 9', 11' surfaces and is dried to provide a transparent protective layer 13 thereon.

Description

[Detailed Description of the Invention] Technical Field The present invention is used for applications such as oblique light flux limiting, displays, photoelectric conversion elements, facsimile machines, single-tube color cameras, solid-state color cameras, and color electrophotography. The present invention relates to a method for manufacturing a multicolor color filter.

Conventional multicolor color filters have multiple desired colors, such as red, red, etc., on a transparent support such as a glass plate or plastic film.
Blue and green color elements are arranged in a predetermined shape (usually in a mosaic shape) so that they do not overlap each other, and are used in various optical devices that require color. A method for manufacturing such a multicolor color filter is to coat a transparent filter support with a photopolymer solution consisting of a photosensitizer such as dichromium #jn, chromate, and a water-soluble polymeric substance such as gelate, PVA, etc. After drying and providing a photosensitive layer, this is exposed to UV/S through a mask of a predetermined shape, and then the exposed surface is developed with a developer capable of dissolving the photopolymer (unexposed areas are dissolved and removed) to form a predetermined shape. This pattern is then dyed with a red, blue or green dye to form the first ten color elements, and then a non-dyeable resin such as acrylic resin to form the second and third color elements. Forming a photosensitive layer on the color element surface via a layer (I-), similarly after nocetanization,
Dyeing method: A dyeable resin layer is provided on the support, the photopolymer solution is applied and dried to provide a photosensitive layer, and this is exposed to ultraviolet light through a mask of a predetermined shape.

Develop the optical surface with a developer that can dissolve the photopolymer.
(dissolve and remove non-exposed areas) and pattern it into a predetermined shape.
Next, photopolymers are not dyed.

The exposed dyeable resin layer is dyed with dyeable dyes (e.g., sublimable dyes) to form the first color element, and then the photopolymer pattern is removed with a strong alkaline solution, and then the second and second color elements are similarly dyed. Methods of forming three color elements are known.

However, in the former method, the dyed resin layer as a color element is partially formed, so even if a flat support is used, the dyed resin layer laminated next after the second layer will not have a uniform thickness. Therefore, it has been difficult to control and ensure uniformity of color spectral characteristics. On the other hand, the latter method requires a step of peeling off the dyed mask with a strong alkali after dyeing, which has disadvantages such as product loss due to poor peeling and poor workability.

Purpose The purpose of the present invention is to obtain each color element with uniformity, and without the need for a mask peeling process.Therefore, the spectral characteristics of each color can be easily controlled and uniform, and product loss due to poor peeling can be avoided. An object of the present invention is to provide a method for manufacturing a multicolor color filter which is free from color and has good workability.

Structure The method for producing a multicolor color filter according to the present invention includes a) providing a photosensitive layer consisting of a sublimable dye and a photopolymer having one of a plurality of desired colors on a transparent or opaque heat-resistant support A; b) creating a dyeing master having the one color element by exposing the photosensitive layer surface of the photosensitive material through a mask of a predetermined shape and developing the photosensitive layer with a developer capable of dissolving the photopolymer; The dyeable transparent support B for filter is brought into close contact with the color element surface of the dyeing master, and the step of sublimating and transferring the one color element onto this by heating from the master side is carried out for each color and in such a way that the color elements do not overlap each other. The method is characterized in that after a plurality of types of color elements are repeatedly formed on the support B, a non-dying resin solution is applied to the color element surface and dried to provide a transparent protective layer.

Method for manufacturing a multicolor color filter according to the present invention tl-3
An example of forming color elements of a color will be explained using rotation.

First, in FIG. 1, a surface of a photosensitive layer 1 of a photosensitive material 3 in which a photosensitive layer 1 containing a sublimable dye having a first color is provided on a support 2 is exposed to ultraviolet rays hv through a mask 4 having a predetermined shape.

[Figure 1(a)]. The mask 4 has, for example, a mosaic-like open arm turn (M is one piece of the mosaic) as shown in FIG. The photopolymer in the exposed area is cured by this exposure, so when the photosensitive layer 1 is then developed with a developing solution capable of dissolving the uncured photopolymer, the unexposed area is dissolved and removed, forming the first color element 5. A staining master 6 is obtained [Fig. 1(b)]. Next, the filter support 7 is brought into close contact with the color element 5 surface of the dyeing master 6, and heated from the master 6 side with, for example, a hot plate 8 [Fig. 1 (C)]
], the second color element 5 on the master 6 is sublimated and transferred onto the filter support 7 as shown at 5' [FIG.
d)].

Next, a photosensitive dye containing a sublimable dye having a second color is used, and the second color element 9 to be finally transferred onto the filter support 7 has already been transferred onto the same support 7. After creating a dyeing master 10 having a second color element 9f in the same manner as in the case of the first color element except for shifting the mask 4 so as not to interfere with the second color element 5' [FIG. 1(e)] ], the second color element 9 on this dyeing master IO is transferred onto the filter support 7 having the transferred first color element 5' in the same manner as in the case of the first color element [FIG. (f) and (g
), ” is the transferred second color element].

Furthermore, when forming a third color element, the same method as in the case of the first color element is repeated. In other words, a photosensitive material containing a sublimable dye having a third color is used, and the third color element 11 to be finally transferred onto the filter support 7 is applied to the first color element 11 which has already been transferred onto the same support 7. After creating the dyeing master 12 having the third color element 11 in the same manner as for the first color element except for shifting the mask 4 so as not to overlap the color element 5' and the second color element 9', Figure (h)], the third color element 11 on this dyeing master 12.

The first color element 5' and the second color element 9' thus transferred are transferred onto the filter support 7 in the same manner as in the case of the first color element (FIG. 10).

As described above, the first color element 5', the second color element 9', and the third color element 11' are formed on the filter support 7 (see FIG. 1(j)). Since the dye sublimates and the transmittance changes, a non-dying resin solution is finally applied and dried on the color element s', i', and 11'' surfaces to form a transparent protective layer 13. A multicolor filter 14 is obtained [Fig. 1 (k)]
. In addition, in such a multicolor color filter 14, color elements! ', 9', 11' layer thickness Fio, s ~ 5μ
The degree is appropriate, and the thickness of the tumor layer 13 is 1-10μ.
The degree is appropriate. - Next, the materials used in the method of the present invention will be explained.

First, any sublimable dye used in photosensitive materials can be used, including disperse dyes, basic dyes, oil-soluble dyes, etc. Among them, sublimation temperature 20
A temperature of 0° C. or lower is preferable from the viewpoint of thermal transfer workability.

On the other hand, the photopolymer may be of negative type or positive type, but negative type is generally preferred, and specific examples thereof include the following.

Summer chromate and albumin, casein, glue, gelatin, gum arabic, shellac.

A mixed system with water-soluble polymer substances such as pv^.

2) Diazo resin (condensate of p-diazodiphenylamine and formaldehyde) and PVA.

Mixture system with resin such as PVA + polyvinyl acetate.

3) p-phenylenebisazide, 4,4'-diazidobenzophenone, 4,4'-diazidodiphenylmethane, 4,4'-cyacytostilbene di4,4'-diazidocalcoy,z,a-di(4 '-azidobenzal) cyclohexane, 2゜6-di(4'-azidobenzal)
-4-Methylcyclohexanone, sodium 4,4'-diazidostilbene-2,2'-disulfonate.

Azide compounds such as sodium l,B-diazidnaphthalene-3,7-disulfonate and natural rubber, synthetic rubber, cyclized rubber, PVA, polyvinylpyrrolidone, diacetone acrylamide, methylcellulose, vinyl alcohol-maleic acid copolymer, etc. A mixed system with resin.

4) Azide group-containing polymers such as polyazidovinyl benzoate, polyazidophthalene vinyl, polyvinylazidobenzalua heptatal, etc.

5) Polymers containing cinnamic acid groups such as vinyl cinnamate, polyvinyl cinnamate phthalate, polyvinyl cinnamylidene acetate, polyvinyl acetate and cinnamylidene acetate.

6) Hetamines and oligomers with ethylenically unsaturated bonds such as acrylic acid, methacrylic acid, methyl methacrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, pentaerythritol triacrylate, and trimetherolzorono(trimethacrylate) A mixed system with a photopolymerization initiator such as , lj, /9 mertohenzoin, heV'/in methyl ether, benzophenone, Hyler's ketone, thioxanthone, and anthraquinone sulfonate.

The weight ratio of the photopolymer to the sublimable dye in the photosensitive layer is preferably about 1/(0,1-1).

Further, the appropriate thickness of the photosensitive layer is about 1 il - 10 .mu.m.

As the support for photosensitive materials, heat-resistant, transparent or opaque materials can be used, such as polyester, polyimide, polysulfone, or polycarbonate-stopped plastic films; metal foils laminated with the above films; ceramic bases; gold. Examples include maple boards, but those that are difficult to dye with ascending dyes are preferred. Therefore, in the case of the plastic film, it is preferable to use it by coating it with a non-dying resin such as gelatin or PVA.

On the other hand, as a support for a color filter, any dyeable and transparent material can be used, such as plastic films made of polyester, polyimide, polysulfone, polycarbonate, acrylic resin, vinyl chloride resin, styrene resin; Examples include coated glass plates.

The developing solution may vary depending on the type of photopolymer used, but examples include water; aqueous alkali solutions; and organic solvents such as trichlorethylene and alcohol.

& The non-staining resin for forming one layer is the same as the resin used for the non-staining layer of Caninae.

The present invention will be explained below by way of examples. Note that S is a one-segment standard.

Example Photosensitive solutions a, b, and C having the following compositions were cracked.

Next, photosensitive solutions a (red), b (blue), and a (green) were applied onto a 100 μm polyester film with a 1 μm thick gelatin layer on the optical surface and dried to form a 5 μm thick photosensitive layer. By providing three types of photosensitive materials a, b, and o, three types of photosensitive materials were created. Next, on the photosensitive layer surface of photosensitive material a, a mosaic pattern as shown in FIG.
rIt) - ultraviolet m through a mask with a rono arm turn
After exposure, it was developed with a developer consisting of trichlorethylene to prepare a dyeing master phosphor having red element R. Similarly, photosensitive materials A and C are used, respectively, and the masks are shifted so that the color elements ultimately transferred onto the filter support do not overlap with each other, so that a dyeing master b having a blue element B and a dyeing master b having a green element G are obtained. Staining master C was created.

Next, a 100μ thick polyester film was closely attached to the red color R side of dyeing master a as a filter support.
A hot plate heated to 150° C. was applied to the master a side and heated for 30 seconds to transfer the red element R onto the filter support. Similarly, for dyeing masters b and C, blue element B and green element G were transferred onto this support, respectively. The thickness of each transferred color element was approximately uniform and approximately 2 μm. Next, apply 1 layer of gelatin on this color element surface.
By applying a 0% aqueous solution with a wire parser and drying it to provide a transparent protective layer with a thickness of 5 μm, a three-color color filter consisting of a red element R, a blue element B, and a green element G as shown in FIG. 3 was manufactured.

When we measured the transmittance of each color element for this multicolor color filter, we found that there was almost no variation in transmittance for each color.
It was confirmed that the spectral characteristics of each color element were uniform.

Effects As described above (according to the method of the present invention, each color element can be obtained with a uniform thickness, and there is no need for a mask peeling process, the spectral characteristics of each color can be easily controlled and uniform, and There is no product loss due to poor peeling, and the process is simplified, resulting in good workability.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the manufacturing process in the method of the present invention, FIG. 2 is a plan view of an example of a mask used in the method of the present invention, and FIG.
The figure is a plan view of a multicolor filter manufactured in a disaster example. l...Photosensitive layer 2...Support for photosensitive material 3...Photosensitive material 4...Mass 5.9.11
...Color element 5', 9%11'...Transferred color element 6.10.12-Dyeing master 7
...filter support 8...hot silage)
13...Transparent protective layer 14...Multicolor color filter M...One piece of mosaic or open pattern R...Red element B...Blue element G...Green enhancement 3 (2 )

Claims (1)

[Claims] 1.a) A photosensitive material comprising a photosensitive layer made of a sublimable dye and a photopolymer having one of a plurality of desired colors on a transparent or opaque heat-resistant support A. After exposing the surface of the photosensitive layer to light through a mask of a predetermined shape, developing the photosensitive layer with a developer capable of dissolving the photopolymer to create a dyeing master having the one color element, and b) the color of this dyeing master. The dyeable transparent support B for filters is brought into close contact with the element surface, and the step of sublimation-transferring the one color element onto this by heating from the master side is repeated for each color and so that the color elements do not overlap each other. After forming multiple types of color elements on the support B,
A method for manufacturing a multicolor color filter, which comprises applying and drying a non-staining resin solution to the color element surface to provide a transparent protective layer.