JPS6067903A - Manufacture of colored resin film of microcolor filter - Google Patents

Abstract

PURPOSE:To obtain an excellent resin film which is securely dyed and maintains the spectral transmission characteristic without deterioration in the succeeding stage by treating the cured resin film in an aq. soln. contg. Al or Cr ion prior to or simultaneously with dyeing of the cured resin film formed on a base plate. CONSTITUTION:A photosetting resin film which is bichromated gelatin or the like formed on a base plate is exposed and developed to form a cured resin into a mosaic shape or the like in order to manufacture a colored resin film of a color filter for the photodetecting part of a color image pickup device. The resin film is treated in an aq. soln. contg. Al ion or Cr ion at 0.001-1.0M concn. and is then immersed in a dyeing bath consisting of a cyan acidic dye or is dyed in the same dyeing bath contg. the above-mentioned ion. The colored resin film obtd. in the above-mentioned way does not elute the fixed dye in the succeeding rinsing stage and maintains the spectral transmission characteristic without deterioration in a treating stage for preventing color staining. The excellent filter is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a micro color filter 71 color resin film for a color imaging device. More specifically, the present invention relates to a method for manufacturing a six-color microcolor filter resin film with excellent spectral transmission characteristics (or spectral absorption characteristics), which is attached to a light receiving section of a color imaging device.

For example, in VTR cameras and the like, color image pickup tubes in which a light receiving section is provided with a micro color filter have been commonly used in order to extract color signals corresponding to color images.

In other words, a color image pickup tube is made of colored resin in the form of minute mosaics or stripes colored with a dye selected from a dye system consisting of red, green and blue, or a dye system consisting of cyan, magenta and yellow. It has a configuration in which a buiklo color filter, which is made up of a combination of multiple layers of films (color separation filters), was previously installed on the surface of the light receiving section of the image pickup tube.

Recently, it has been used as a device to replace the image pickup tube.

As various solid-state imaging devices such as CCD, BBD, and MOS have been developed, 1. With the main purpose of miniaturizing the V T RII+ camera mentioned above, the practical application of a color solid-state image sensor that combines a solid-state image sensor and a micro color filter is being considered, and some have already put it into practical use. has been done.

Color solid-state image sensors generally consist of nine-dimensional conversion elements called pixels and a flat image sensor integrated circuit (IC) that integrates a scanning circuit. It has a structure in which a micro color filter is attached, which is made up of a plurality of layers of colored resin 11 (color separation filter elements) in the form of minute mosaics or stripes colored with dyes corresponding to the pixels.

In order to provide a color imaging device as described above by attaching a micro color filter to an imaging device such as an image pickup tube or a solid-state imaging device, the following method is generally used.

Imaging′! A photocurable resin solution such as dichromate gelatin is coated on the light receiving part (for example, the light receiving part of an image pickup tube or solid-state image sensor) in position A or on a transparent support such as glass attached to the light receiving part. Form a photocurable resin film,
Light that has passed through the exposure pattern is irradiated onto the surface of the resin film to generate a mosaic or stripe-like hardened portion on the resin film.

Next, this partially cured resin film is washed with an appropriate solvent to dissolve and remove the uncured portion, resulting in a mosaic or striped cured resin film. ! ) Then, this cured resin film is dyed with one of red, green, old, cyan, magenta, or yellow dyes to form a colored resin film.

Next, a color contamination prevention film (intermediate layer) is formed on the colored resin film 1- formed in this way, or a color contamination prevention treatment (color mixing prevention treatment) is applied to the colored resin film. A photocurable resin film is formed in the same manner as above, and the surface thereof is irradiated with light that has passed through another exposure pattern to generate another mosaic-like or stripe-like cured portion on the resin film. Then, remove the uncured resin part in the same way, dye the cured resin film with another dye, and make colored resin II.
form.

Furthermore, if necessary, such coloring v! After repeating the operations of forming 4 resins + 1'2 to form the desired multi-layer colored resin film, the formation of the micro color filter is completed by finally installing the surface coating film. During or before and after each operation of the foot, operations such as exposing the bonding pad part necessary for forming a circuit may be included, but these operations are not directly related to the present invention. The explanation will be omitted.

In recent years, with the spread of color imaging devices, the purposes for which they are used have become more diverse.Therefore, improvements in color image pickup tubes or color solid-state imaging devices, in other words, improvements in the performance of color imaging devices such as sensitivity, resolution, and color reproducibility, are needed. improvement is required.

One of the factors that influences the performance of these color imaging devices is the spectral transmission characteristics of the micro color filter colored resin film that constitutes the color imaging device. This spectral transmission characteristic means the transmission performance of incident light in a predetermined wavelength range of the colored resin film. That is,
In order to reproduce excellent color images, each colored resin film needs to exhibit high light transmission performance in a predetermined wavelength range.

Various types of dyes have been studied for forming colored resin films, and the dye itself has excellent spectral transmission in a predetermined wavelength range. We have obtained products showing the characteristics. However, depending on the type of dye, special conditions may be required to dye the resin film sufficiently, or when colored resin S is formed through a process of dyeing the resin film. In some cases, there are some that do not meet the prescribed spectral transmission characteristics (4 characteristics), so is there a solution to that problem? Central power ζ is required.

In addition, when multiple layers of colored resin films are stacked, an intermediate layer for color prevention is not provided, and tannic acid or the like is used to prevent color contamination between each colored resin film. A chemical color stain prevention treatment is used, but this treatment may change the light transmission properties of the colored resin, and a solution to this problem is desired.

For example, a cyan acidic dye is usually used to form a cyan-colored resin film;
Examples include phthalocyanine acid dyes that have strong absorption in the wavelength range of 00 to 700 nm and have excellent storage stability.

Dyeing of a resin film with the phthalocyanine acid dye described in item 1- is usually carried out in an acidic bath having a pH of about 3.0 to 5.5. However, a one-color resin film dyed using an acidic bath having a pH in such a range may be affected by the environmental pH of the colored resin 1jQ due to the resistant substances transferred from the acidic bath into the colored resin film. Since it becomes clearly acidic, the excellent spectral transmission characteristics in a predetermined wavelength range that the cyan-based butyric dye I itself has tended to deteriorate. In contrast, 1A is aimed at improving the spectral transmission characteristics of cyan acidic dyes in colored resin films.
As a target, the pH of the dyeing bath should be set to a neutral side (for example, pH 5,
5 to 8.0), the problem arises that the dye tends to adhere to the resin film, making it impossible to achieve high-density dyeing.

Alternatively, staining can be carried out at pH 3.0 to 5.5.
By rinsing the dyed resin film in a moderately acidic bath and then rinsing it overnight with a rinse having a pH around neutral, there is a means to bring the LW boundary pH of the colored resin film to the neutral side. It is conceivable that even with this method, the cyan acidic dye contained in the colored resin film tends to be easily eluted into the above-mentioned rinse solution 11. The problem is that the dye concentration in the colored resin film decreases.

If the dye content of the colored resin film is not sufficiently high6), increase the film thickness to increase the dye content per unit area of the colored resin film, thereby achieving improved spectral transmission characteristics. However, in that case, a problem arises in that the resolution of the colored resin 11 is lower due to the increased thickness of the colored resin film, so it is not practical. ) will be disadvantageous.

In the case where a 7I color resin film colored with a cyan acid dye is subjected to color stain prevention 11JIP using tannic acid etc., this treatment changes the absorption spectrum of the cyan colored resin film to the yellow side. There is a tendency for the spectral transmission characteristics of the cyan colored resin film to change from a predetermined characteristic, which is also a practical disadvantage.

The present inventor has developed a method for treating the cured resin film with a treatment liquid containing aluminum ions and/or chromium ions before or at the same time as dyeing the cured resin film, thereby reducing the adhesion of the dye to the cured resin film. The present inventors have discovered that it is possible to effectively achieve both the improvement of the properties and the prevention of changes in the spectral transmission characteristics of the colored resin film due to the subsequent color stain prevention treatment, and have thus arrived at the present invention.

The present invention provides a method for producing a colored resin film for a micro color filter, which comprises immersing a cured resin film attached to a support or a light receiving part of a color imaging device in a dyeing bath to obtain a colored resin film. A method for producing a micro color filter colored resin film for a color imaging device, characterized in that the cured resin film is treated with a treatment liquid containing aluminum ions and/or chromium ions before or at the same time as the dyeing. It is something.

However, especially acidic phthalocyanine dyes,
pHgA range suitable for dyeing on cured resin films.

It is highly useful when producing a micro color filter colored resin film using a dye that does not match the pH range suitable for expressing excellent spectral transmission characteristics. By utilizing the present invention, a micro color filter colored resin film having excellent spectral transmission characteristics can be obtained.

Next, the present invention will be explained in detail.

Imaging devices to which the micro color filter colored resin film manufactured according to the present invention is attached include image pickup tubes, solid-state imaging devices, and the like.

The image pickup tube is not particularly limited in its type, structure, etc., and various known image pickup tubes can be used.

There are no particular restrictions on the type or structure of the solid-state image sensor; for example, the known CCD, BB
Various solid-state image sensors such as D, MOS, etc. can be used.

The micro color filter colored resin film of the present invention basically consists of: I) Step of forming a photocurable 4#l oil film: ■) Step of forming a cured resin film; ■) Step of forming a colored resin film; Manufactured by a process consisting of:

The method for producing a colored resin film for a color filter described above is carried out, for example, by the following method.

First, the protective film on the light-receiving part of the image pickup tube and the light-receiving part of the solid-state image sensor (if there is another film such as a smooth film on the protective film, on the topmost film) 1 , or a transparent support (e.g.,
A photocurable resin film is formed by applying a photocurable resin solution onto the glass. As photocurable resins, dichromate or protein materials containing chromic acid are generally used, such as dichromate gelatin, chromium gelatin, dichromate casein, chromium butylene glue, etc. Other types of photocurable synthetic materials may also be used, such as photocurable polyvinyl alcohol.

Next, the surface of the photocurable resin film is irradiated with light through a mosaic or stripe-like exposure pattern to generate a mosaic or stripe-like cured portion on the resin film that corresponds to the exposure pattern. . Then, this partially cured resin film is washed with a suitable solvent, for example, warm water when dichromate gelatin is used as the photocurable resin, to dissolve and remove the uncured parts, resulting in a mosaic or A striped cured resin film is obtained.

In the conventional method for producing colored resin films for micro color filters, the formed cured resin film is then colored red and green as described below.

A colored resin film that functions as a color separation filter element is obtained by dyeing with one of blue, cyan, magenta, or yellow dyes.6 In the present invention, before or at the same time as the dyeing process, Processing liquid containing aluminum ions and/or chromium ions (hereinafter referred to as
The method is characterized in that the cured resin film is treated with an An/Cr-containing treatment liquid. For example, the treatment with the above-mentioned Al/Cr-containing treatment liquid may cause the cured resin film to be treated with Al/Cr containing treatment liquid.
/ Methods such as immersion in a Cr-containing treatment solution and then carrying out a normal dyeing process, or methods in which the cured resin film is dyed with a dyeing solution containing aluminum ions and/or chromium ions. can be used.

The preferred method for 1F is the former method, in which treatment with an Al/Cr-containing treatment liquid and staining are performed separately in this order.

”The bipedal A fL/Cr-containing treatment solution is capable of converting aluminum ions and/or chromium ions into o, ooiM-
It is preferably contained at a concentration of 1.0M,
In addition, the Al/Cr-containing treatment liquid described in "t", which is particularly preferably contained at a concentration of 0.01M to 0.2M, is a mixture of water-soluble salts of the respective metals. Alternatively, it can be easily prepared by dissolving it in an aqueous organic solvent. However, as the aluminum ion and/or chromium ion used in the present invention, M
Summer 2 (SOa)g ・M! , 2 SOa I+24H
20 (wherein M'' represents AM or cr, and M represents Na or NH4).

Note that the compound from which aluminum ions and/or chromium ions are derived preferably does not contain alkali metals as constituent atoms or as impurities. Alkali metals.

The micro color filter colored resin film attached to the solid-state image sensor must not contain alkali metals, even if there is a shielding layer between them, because if it is mixed into the solid-state image sensor, the function of the solid-state image sensor will be degraded. It is desirable to avoid this as much as possible.

When the Al/Cr-containing treatment liquid used in the present invention contains an alkali metal, a portion of the alkali metal naturally permeates into the colored resin film together with AU and/or Cr in the treatment liquid. Therefore, when using alum as described above as a source of aluminum ions and/or chromium ions, ammonium alum is used. It is particularly preferable.

The treatment of the cured resin film with the A/Cr-containing treatment liquid in the present invention is performed by treating the cured resin film with the treatment liquid (a treatment liquid containing aluminum ions, a treatment liquid containing croto ions, or an aluminum ion-containing treatment liquid, as described by Fiij). It is desirable to carry out the method of immersion in a treatment solution containing both ions and chromium ions, and the immersion time in that case is usually selected from a range of about 1 second to 30 minutes.

The cured resin +19 treated with the A l /Cr-containing treatment liquid is then dyed. Dyeing of the cured resin film is usually carried out by a method of immersing the cured resin in a dyeing bath for a certain period of time, and the dyeing of the cured resin film in the present invention can also be carried out by a known method.

Dyes used for dyeing cured resin films include various acid dyes, basic dyes, and direct dyes. It is also possible to use dyes arbitrarily selected from known dyes or dyes having properties equivalent to those known dyes. However, as mentioned above, the method for producing the colored resin film of the micro color filter of the present invention is suitable for the PH region suitable for dyeing cured resin films and the expression of excellent spectral transmission characteristics, such as phthalocyanine-based acid dyes. This is particularly effective when using dyes whose PH regions do not match.

A cured resin film treated with an Al/Cr-containing treatment solution according to the present invention is more easily dyed with dyes, especially cyan dyes such as phthalocyanine acid dyes*1, than an untreated cured resin film. Ru.

In other words, when a cured resin film is generally dyed using a cyan dye such as a 7-talocyanine acid dye in a dye bath with a pH of 5.5 or higher, the amount of dye dye 1 becomes insufficient. However, even under such conditions, the dye adheres sufficiently quickly to the cured resin film that has been subjected to the An/Cr containing treatment according to the present invention.

Further, the dyed resin film obtained by dyeing the cured resin film may be dried as it is to form a colored resin film, but is generally subjected to a -H rinse treatment with a rinsing liquid. This rinsing process is a process in which the dyed cured resin film is rinsed by immersing it in a rinsing bath for a short period of time to remove components other than dyes from the dyeing bath that have been mixed into the dyed resin film. .

However, if the pH is lower than 5.5 (for example, pH 4) containing cyan dyes such as acidic phthalocyanine dyes,
, Q~5. When dyeing a cured resin film using the dyeing bath o), it is preferable to set the environmental pH in the dyed resin film to 5.5 or higher for the above-mentioned reasons.
It is desirable to rinse the dyed resin film using a rinsing liquid having a pH of 5.5 to 7.0. Also in the rinsing treatment for this purpose, An/Cr
Since the elution of the dye from the resin film that has been treated with the containing treatment solution and then dyed is highly suppressed, the dye concentration of the resulting colored resin film is not significantly reduced, and the spectroscopic properties of the colored resin film are Since the transmission characteristics are as desired, the colored resin film of the microcolor filter obtained is extremely advantageous for practical use.

In addition, in the above description, the method was mainly described in which the cured resin film is first treated with an A/Cr-containing treatment liquid and then dyed. The treatment with the treatment liquid can be carried out at the same time as the staining, and in that case, the specific operation can be carried out by someone who is similar to the above-mentioned operation.

Furthermore, the treatment with the Al/Cr-containing treatment liquid according to the present invention can be carried out not only before the dyeing process but also after the dyeing process. Namely.

After dyeing the cured resin film that has been treated with the Al/Cr-containing treatment liquid, it is dyed again with Al/Cr-containing treatment solution 5.
When a method of treating with a treatment liquid and then rinsing the treated liquid is used, the elution of the dyed gel into the rinsing liquid can be more effectively suppressed.

The dyed resin film or the resin film further rinsed after dyeing is then dried by a known method to obtain the desired colored resin film.

When another colored resin film is formed on top of the colored resin film formed as described above, 77 may be subjected to color mixing prevention treatment to prevent color mixing as described above.

A typical example of color mixing prevention treatment is known to be a treatment in which a tannic acid-containing resistant aqueous solution and a tartaric resistant alkali metal salt aqueous solution are sequentially used, and the micro color filter colored resin film produced according to the present invention is also treated in this way. A known color mixing prevention treatment can be applied. however,
Even in this color mixture prevention treatment, it is rare to mix alkali metals into the colored resin film, so it is preferable to use a salt of antimonyl tartrate and an organic base instead of the above-mentioned antimonyl tartrate alkali metal salt. .

When a colored resin film manufactured by a conventional method is subjected to color mixing prevention treatment as described above, changes may occur such that the colored resin film no longer exhibits a predetermined absorption spectrum. There is a tendency for an undesirable phenomenon called reticulation to occur on the surface of the resin film.

On the other hand, colored resin films treated with a treatment solution containing aluminum ions and/or chromium ions according to the present invention are inhibited from causing undesirable phenomena such as changes in the absorption spectrum or occurrence of reciprocation. There is also the advantage of

The colored resin film produced through the processing steps described above is coated with an intermediate film to prevent color contamination if necessary, and then a photocurable resin solution is applied to form a photocurable resin film. A micro color filter is formed by repeating the same steps of forming a colored resin film, color stain prevention treatment, or attaching an intermediate film as necessary, and then providing a surface protective film.

Next, Examples and Comparative Examples of the present invention will be shown.

[Example 1] A transparent glass substrate was coated with dichromium distilled gelatin, and the film thickness was 0.5p, kn, 0.751Lm, l.

Six types of photocurable resin films of Opm, 1.25 μm, 1.5 μm, and 2.5 pm were separately provided, and a mask (exposure) (turn) consisting of a mosaic pattern was placed on top of them for contact exposure. . Next, the exposed resin film was washed with hot water to elute and remove the uncured portions of the resin film, thereby forming a cured resin relief pattern consisting of mosaic-like convex portions.

Next, these hardened trees WJll'j! was treated with chromium by immersing it in a 42mM ammonium chromate solution adjusted to pH 4.0 for 10 minutes, and then washing it with pure water for 5 minutes.

These chromium-treated cured resin films are dyed with a dye bath (pH 6.0) containing cyan acid dye (Kayanoor Milling Turquoise 3G, manufactured by Nippon Kayakuyaku) and dried to form a colored resin film. Prepared.

The results of measuring the cyan dyeing density as the optical density at 630 nm for the above six types of colored resin films are shown as A in FIG.

Comparative Example 1] The cyan staining density of the six types of colored resin films was measured in the same manner as in Example 1, except that the cured resin films were not subjected to chromium treatment. - The results are shown as B in Figure 1.

Comparing the respective cyan dyeing densities of Example 1 and Comparative Example 1 shown in Figure 1, it is found that by performing chromium treatment before dyeing, the amount of cyan dye dyed onto the colored resin film was significantly increased. It is clear that

[Example 2] In the same manner as in Example 1, the film thickness was 0.75 gm, t, oJ.
Three types of cured resin films of Lm and 1.25 gm were obtained.

Adjusted the pH to 5.0-6.0 with ammonia and acetic acid 4
A 0mM ammonium aluminum sulfate (IN) aqueous solution was prepared, and the cured resin film was immersed in this aqueous solution at room temperature for 2 minutes to carry out aluminum treatment, and then washed with pure water for 1 minute. A cured resin +1'i' was obtained.

The aluminum-treated cured resin film of I- is treated with phthalocyanine acid dye: Cu-[Pc-(SO3-P3'') 4] (However, P
Dyeing was carried out using a dyeing bath (pH 6.0) containing (c represents a phthalocyanine skeleton and Py" represents a pyridinium ion), and three types of colored resin films having different film thicknesses were prepared.

The cyan dyeing density of three types of colored resin films of "-2" was measured in the same manner as in Example 1, and the results are shown as C in FIG.

[Comparative Example 2] Three types of colored resin films were prepared by dyeing the cured resin films with a phthalocyanine-based acid dye in the same manner as in Example 2, except that the aluminum treatment was not performed.

The cyan dyeing density of three types of colored resin films was measured in the same manner as in Example 1, and the results are shown as D in FIG.

Comparing the cyan dyeing density of 1 4 H 2)-Ryuuga 9 small work pattern 1 shown in Figure 2, it is found that the phthalocyanine dye is dyed into the colored resin film by performing the Fluminilum treatment before dyeing. It is clear that the amount is significantly increased.

[Example 3] A cured resin film having a film thickness of 1.0 pm was obtained in the same manner as in Example 1.

Next, this cured resin film was coated with 42m
After chromium treatment by immersing it in M chromium sulfate (llF) ammonium aqueous solution for 10 minutes, it was washed with pure water for 1 minute.

This chromium-treated cured resin film was dyed in a dye bath containing the phthalocyanine acid dye shown in Example 2 (pH 6).
, 0) for dyeing and drying for 1° to prepare a colored resin film.

The transmission spectrum of this colored resin film in the wavelength range of 400 to 700 nm was measured. The titted transmission spectrum is shown as E in FIG.

Next, this colored tree! 114m was subjected to color mixing prevention treatment consisting of the following tannic acid treatment and antimonyl potassium tartrate treatment.

First step: The colored resin film is immersed in an aqueous solution of 2 g of tannic acid and 10 m of acetic acid dissolved in 1M ice at 40° C. for 3 minutes, and then washed with water for 1 minute.

2nd step: 5g of potassium 7thmonyl tartrate and 2.5ml of acetic acid are dissolved in water IQ to create an aqueous solution.

Colored resin film treated with tannic acid at 40℃ for 3 minutes11
After immersion in X1, the colored resin film is washed with water for 1 minute.

Wavelength range 40 of the colored resin film subjected to this color mixture prevention treatment
The transmission spectrum in the range from 0 to 700 nm was measured in the same manner as in Example 3. The obtained transmission spectrum is shown as F in FIG.

Comparing the spectra of E and F in Figure 3, the transmission spectrum of the colored resin film treated with chromium shows that after the color mixture prevention treatment, the transmission in the blue region decreases slightly as a whole, but the measured It can be seen that there is no significant change in the shape of the spectrum over the entire wavelength range.

[Comparative Example 3] The thickness of the cured resin film was 1.511. A colored resin film was prepared in the same manner as in Example 3, except that the cured resin film was not subjected to chromium treatment.

The transmission spectrum of this colored resin film in the wavelength range of 400 to 700 nm was measured. The obtained transmission spectrum is shown as G in FIG.

After the colored resin film was subjected to the same color mixture prevention treatment as in Example 3, the transmission spectrum of the colored resin film subjected to the color mixture prevention treatment in the wavelength range of 400 to 700 nm was measured. The obtained transmission spectrum is shown as H in FIG.

Comparing the transmission spectra of E in Figure 3 and G in Figure 4, the film thickness of the 7I color resin film is 1 in the former (chromium treated) and latter (not chromium treated).
．． Despite the large differences between O-m (former) and T, 5-m (latter), their transmission spectra are almost the same. That is, this comparison also shows that the amount of dye adhering to the chromium-treated resin film is large.

In addition, when comparing the transmission spectra of G and H in Figure 4, the colored resin film without chromium treatment has a slightly lower transmittance in the blue region (400 to 500 nm) after the color mixture prevention treatment; The wavelength showing a 50% transmission rate shifts to the longer wavelength side, the transmittance increases in the wavelength range of 600 to 630 nm, and there is a large change in the shape of the spectrum over the entire measurement wavelength range, indicating that chromium treatment has been applied. It can be seen that the spectral transmittance characteristics of the colored resin film, which does not contain any color, clearly fluctuates due to the color mixture prevention treatment as described above.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the results of measuring the cyan dyeing density of a colored resin film as an optical density at 630 nm;
is the optical density of the colored resin film treated with chromium, and B
indicates the optical density of the colored resin film without chromium treatment. Figure 2 shows the results of measuring the cyan dyeing density of the colored resin film as the optical density at 630 nm.
r--41ml-horse chestnut 1I par r%), bn:JI? l
-Hee-4kl&”-Ichimachi JJ. The optical density of the resin film, specifically D, indicates the optical density of the colored resin film that has not been subjected to aluminum treatment. FIG. 3 shows a transmission spectrum (E) of a chromium-treated colored resin film and a transmission spectrum (F) measured after the chromium-treated colored resin film was subjected to color mixing prevention treatment. Figure 4 shows the transmission spectrum (G) of a colored resin film that has not been subjected to chromium treatment and the transmission spectrum (f()) that was measured after the colored resin film that had not been chromium treated was subjected to color mixing prevention treatment. Yasuo Yanagawa, Patent Attorney, Fuji Photo Film Co., Ltd.

Claims (1)

[Claims] l. In a method for manufacturing a micro color filter colored resin film, which consists of immersing a cured resin film previously installed on the support or the light receiving part of a color imaging device in a dyeing bath to obtain a colored resin film, before dyeing the cured resin film, Alternatively, a method for producing a micro color filter colored resin film for a color imaging device, characterized in that the cured resin 11 is treated with a treatment liquid containing aluminum ions and/or chromium ions at the same time as dyeing. 2゜The treatment liquid containing aluminum ions and/or chromium ions described in 2.4 contains aluminum ions and/or chromium ions at a concentration of 0.001M to 1.0M, 4. ν fraudulent claim. A method for producing a micro color filter colored resin film according to item 1. 3. The above aluminum ions and/or chromium ions are derived from alum expressed by the general formula: A method for producing a micro color filter clear color resin I according to claim 1 or 2, characterized in that it is Micro color filter coloring tree III I+! according to claim 1 or 2, characterized in that the dye used for the 4° dyeing is an acid dye. ,! manufacturing method. 5. The method for producing a micro color filter colored resin film according to claim 4, wherein the acid dye is a cyan acid dye. 6. The method for producing a micro color filter colored resin film according to claim 5, wherein the cyan acid dye is a phthalocyanine derivative acid dye. 7. The micro color filter colored resin according to claim 6, characterized in that the cured resin film is treated with a treatment liquid containing aluminum ions and/or chromium ions before dyeing. II! A! manufacturing method. 8゜The pH of the dyeing bath for hardening resin dyeing is 3.0 to 5.
．． 5, and the dyed cured resin film has a pH of 5.5 to 8.
．． 8. The micro color filter colored resin film according to claim 7, further comprising a step of treating with a rinsing liquid of 0.0 or less. 9゜The pH of the dyeing bath for dyeing the cured resin film is 4.0 to 5.0.
and the dyed cured resin film at pH 5.5 to 7.0.
4. It includes a process of treatment with a rinsing solution. Preparation of a micro color filter colored resin film according to claim 8.