JP3463347B2 - Transfer sheet for color filter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet for producing a color filter used in a color liquid crystal display device or the like, and more particularly to a transfer substrate on which a color filter layer composed of colored layers of a plurality of colors is provided. The present invention relates to a color filter transfer sheet (hereinafter, simply referred to as “transfer sheet”) that can be collectively transferred to easily manufacture a color filter.

[0002]

2. Description of the Related Art A color liquid crystal display device has many advantages not found in a light emitting display device, such as thinness, low power consumption, and light weight. It is widely used as a display device for various devices such as a portable computer such as a book-type computer, and in recent years, there has been a strong demand for an increase in size thereof. In this color liquid crystal display device, a color filter for expressing full color is used. In this color filter, a transparent colored layer colored in at least one of red (R), green (G), and blue (B) is usually formed on a transparent substrate made of glass, as shown in FIG. As a dot-shaped pixel pattern as shown in FIG.
As a stripe pattern as shown in (c), different colors are arranged adjacent to each other.

In order to manufacture this color filter, generally, a color filter layer is directly formed on a glass substrate by a method such as a photolithography method, a printing method, an electrodeposition method or the like. However, all of these methods require an operation of forming a colored layer pattern that is repeated for a single transparent substrate for the number of colors of the color filter layer, and the process is extremely complicated and requires many steps and time. However, precise alignment is required for each individual forming operation, and even slight misalignment and pixel loss are defective, so especially in the manufacturing of large-sized products where the probability of misalignment or pixel loss increases, the yield is extremely high. Is bad. In addition, large-sized products have a high breakage rate because the substrate is glass, which makes mass production difficult.

In particular, if the manufacturing process of the color filter is to be incorporated into the integrated manufacturing process of the color liquid crystal display device, the complexity of the above-mentioned process and the poor yield are combined, and the production efficiency of the whole process is remarkably reduced. To do. Therefore, a production method has been adopted in which the color filter is produced in another factory, and the color filter is carried into the assembly factory of the color liquid crystal display device and incorporated therein. However, since the color filter has the color filter layer formed on the glass substrate as described above, it is heavy and easily damaged. In particular, in a large-sized color liquid crystal display device, the color filter also has a large area, which causes the problem of deformation and displacement due to bending or the like. For this reason, even if the color filters are produced at another factory, they are stored and transported in a sturdy box with the color filters separated from each other. It is required, and it is difficult to automate loading / unloading, so that it is not always necessary to improve production efficiency.

Therefore, recently, the transfer method has attracted attention. The transfer method is a method of using a transfer sheet in which a colored layer pattern is formed on a support sheet in advance, and transferring the colored layer pattern onto a transfer target substrate. Since the transfer sheet is lightweight and flexible, it can be manufactured in another factory and rolled and stored / transported, for example, and it can be easily introduced into the automatic process of the color filter manufacturing factory. It has an advantage that it can be easily transferred to a transfer target substrate, and is suitable for mass production of color filters.

[0006]

However, it has been difficult in the prior art to use a transfer sheet in which colored layer patterns of a plurality of colors are collectively formed on a support sheet. This is because, when transferring the color filter layer from the transfer sheet to the transfer substrate, it is practical that all the pixels forming the pattern of the colored layers of a plurality of colors are collectively transferred to the transfer substrate without loss. It was because it was difficult.
Further, when the transfer sheet is rolled for the convenience of transportation and storage, there is a problem that the support sheet and the color filter layer rub against each other and the color filter layer is damaged. In particular,
If an adhesive layer for transfer is provided on the color filter layer for the purpose of improving the efficiency of the manufacturing process, the adhesiveness prevents the roll winding. The present invention has been made to solve these problems, and therefore an object thereof is to be able to collectively transfer colored layer patterns of a plurality of colors onto a transfer target substrate without defects and roll the film. Is to provide a transfer sheet which does not cause any trouble.

[0007]

Means for Solving the Problems The above-mentioned problem is that a release layer made of photo-curing polyvinyl alcohol is formed on a support sheet, the color filter layer is formed on the release layer, and the color filter layer is protected. The problem can be solved by providing a transfer sheet for a color filter coated with a sheet. The above support sheet is preferably made of either a heat resistant synthetic resin or a nickel-iron based alloy. It is preferable that alignment marks are formed on the support sheet for aligning the colored layers of the color filter layer or for aligning the colored layers with the transfer substrate. Further, it is preferable that an adhesive layer for adhering the color filter layer to the transfer substrate is formed between the color filter layer and the protective sheet. This adhesive layer is preferably made of an ultraviolet curable adhesive.

[0008]

The release layer made of photocurable polyvinyl alcohol adheres well to the support sheet and has good release properties from the color filter layer. Therefore, the colored layers of a plurality of colors are collectively transferred without loss. The protective sheet protects the color filter layer from rubbing when it is rolled. Further, even when the adhesive layer is formed on the color filter layer, it is possible to roll and rewind.

The present invention will be described in detail below with reference to the drawings. FIG. 1 shows a preferred embodiment of the transfer sheet of the present invention. In FIG. 1, the transfer sheet 10 has a release layer 2 made of photocurable polyvinyl alcohol formed on a support sheet 1, and three colored layers 3R, 3G, and 3B (hereinafter, generally referred to as a release layer 2). "Coloring layer 3")
Is formed, and the color filter layer 4 is covered with a protective sheet 5. The color filter layers 4 are two-dimensionally arranged so that the colored layers 3 of different colors are adjacent to each other.

An example of a method of manufacturing a color filter using this transfer sheet 10 is shown in FIGS. First, as shown in FIG. 2A, the transfer substrate 20 is prepared. The transfer target substrate 20 has an adhesive layer 6 made of an ultraviolet curable adhesive on one surface of a glass substrate 21. Next, the protective sheet 5 of the transfer sheet 10 is peeled off to expose the color filter layer 4, the adhesive layer 6 of the transferred substrate 20 and the color filter layer 4 on the transfer sheet side are adhered to each other, and the glass substrate 21 side Ultraviolet rays are irradiated to cure the adhesive layer 6. Next, as shown in FIG. 2B, when the support sheet 1 is peeled off from the transferred substrate 20, the interface between the color filter layer 4 and the peeling layer 2 is peeled off, and only the color filter layer 4 is on the transferred substrate 20 side. And the color filter 22 is obtained.

The supporting sheet 1 of the transfer sheet 10 can be formed of a heat resistant synthetic resin. If the support sheet 1 is made of a heat-resistant synthetic resin, the color filter layer can be formed with high accuracy because it is resistant to heat and chemicals applied in the step of forming the color filter layer 4, etc. However, the substrate to be transferred 2 is deformed by it.
There will be no positional deviation from 0.

Examples of heat resistant synthetic resins that can be used for the support sheet 1 include polyethylene naphthalate, polyether sulfone, polyparabanic acid, polyethylene terephthalate, polyimide and polycarbonate. Laminate films of these or these and other synthetic resins can also be used.

The support sheet 1 can also be formed from a nickel-iron alloy. The nickel-iron alloy is an alloy that contains nickel and iron as essential components, and may also contain cobalt, manganese, carbon, etc.,
It has excellent corrosion resistance and a low coefficient of linear expansion, and is about the same as that of low-expansion glass (coefficient of linear expansion: 30 to 60 × 10 ⁻⁷ ) used as a glass substrate of a color filter. Therefore, the transfer sheet using this as the support sheet 1 is
Even if it is heated during the transfer, it does not cause a positional deviation with respect to the transferred substrate 20.

As an example of this nickel-iron alloy, 42
Alloy (42 wt% Ni, balance Fe, coefficient of linear expansion: 37 to
40 × 10 ^-7 ), Fernico or Kovar (both are trade names, Ni 30% by weight, Co 13% by weight, balance Fe,
Linear expansion coefficient: 36-38 × 10 ^-7 ), amber (Ni3
6 wt%, Mn 0.7 wt%, C <0.20 wt%, balance Fe, linear expansion coefficient: 10 to 20 × 10 ⁻⁷ ) and the like.

Whether the support sheet 1 is made of a heat-resistant synthetic resin or a nickel-iron alloy, it has a thickness of 50 μm.
It is preferably in the range of m to 200 μm, and it is preferable to form a roll sheet that can be rolled. If the support sheet 1 is a roll sheet, a large number of color filter layers can be rolled and conveyed by forming a plurality of filter layer units for one color filter in a tandem or continuously. Further, by using this roll, continuous transfer work can be automatically performed in the manufacturing process of the color liquid crystal device.

The support sheet 1 is preferably provided with alignment marks for alignment. This alignment mark can be conveniently used for aligning each colored layer of the color filter layer 4, aligning each colored layer 3 with the transferred substrate 20, and the like. That is, in general, in order to form the color filter layer 4, each colored layer 3R,
Since 3G and 3B are sequentially formed by a photolithography method or a printing method, precise alignment between them is extremely important. By forming the reference mark for the alignment on the support sheet 1, the color filter layer 4 having good dimensional accuracy can be efficiently formed. In addition, particularly when the support sheet 1 is formed of a roll sheet as described above, each color filter unit formed on the roll sheet is read and precisely aligned with the transfer target substrate 20, and then transferred. There is a need to. The alignment mark can be conveniently used for reading the color filter unit. This alignment mark is formed on the portion of the support sheet 1 where the release layer 2 is not applied, by photolithography or laser, prior to the formation of each colored layer 3.

Release layer 2 formed on support sheet 1
Is a photo-curable polyvinyl alcohol.
The release layer 2 is formed by applying a mixture of polyvinyl alcohol and a photocrosslinking agent such as dichromate, chromate, or diazo compound evenly on the support sheet 1 and irradiating it with ultraviolet rays to cure the mixture. Can be formed by the above method. Curing of the uncured release layer is carried out by irradiation of ultraviolet rays, but at this time, it is preferable to use heating in combination in order to complete the curing. This heating is, for example, 1
It is carried out at 20 ° C to 170 ° C for 30 minutes to 2 hours.
Alternatively, a method in which the uncured release layer is entirely exposed to light and then brought into contact with an aqueous solution of chromic anhydride, and then subjected to heat treatment at 100 ° C. for 10 minutes is also a preferable method because the surface of the release layer 2 is further hardened. is there.

The peeling layer 2 adheres well to the support sheet 1 by the above hardening treatment and adheres to the color filter layer 4 with a relatively weak adhesive force. by this,
When the support sheet 1 is peeled off from the transferred substrate 20 after the transfer, the release layer 2 is peeled off along with the support sheet 1, and the color filter layer 4 is collectively transferred to the transferred substrate 20 side without any pixel defect. Become. It is preferable that the release layer 2 has a thickness of about 1 μm to 15 μm and a surface smoothness of about 0.1 μm or less.

The photocured polyvinyl alcohol is insoluble in water and oil, has heat resistance, is stable to heat and chemicals when forming a color filter layer, and is formed on the release layer 2. Even if the material of the color filter layer 4 to be used is a water-soluble resin or an oil-soluble resin, the coatability is good.

A color filter layer 4 is formed on the cured release layer 2. In general, the color filter layer 4 has at least the transparent colored layers 3R, 3G, and 3B colored in at least one of red (R), green (G), and blue (B),
Colored layers of different colors are arranged in a plane so as to be adjacent to each other. If the colored layers are dot-shaped, the pattern of this array is, for example, as shown in FIG. 3A, a so-called mosaic array in which each colored layer 3 is arranged in a square, or shown in FIG. 3B. As described above, a set of colored layer groups including 3R, 3G, and 3B is arranged in a triangle to form a so-called triangle array. Further, a coloring layer having a stripe shape as shown in FIG. 3C and arranged in parallel is often used as a stripe arrangement. The selection of these array patterns is made in response to the demands of the color liquid crystal display device to be manufactured. The color filter layer 4 includes the colored layers 3R, 3G, 3
It is preferable that B are arranged apart from each other.
That is, the gap 7 is formed between the adjacent colored layers.

As a method of molding the color filter layer 4, any of the conventionally known photolithography method, printing method, electrodeposition method and the like can be adopted. As the photolithography method, either a pigment dispersion method or a dyeing method can be adopted.

In the pigment dispersion method, first, a resist (R resist) in which, for example, a red (R) pigment is dispersed is applied on the above-mentioned release layer, and after prebaking, an R pattern is exposed, developed and postbaked to form a colored layer. 3R is formed. Next, for example, a green (G) resist is applied thereon, and after prebaking, the G pattern is exposed, developed and postbaked to form the colored layer 3G. Further, similarly, a blue colored layer 3B is formed.

In the case of the dyeing method, for example, an R pattern layer is formed using a resist containing no pigment, and is dyed red in an R dyeing bath to form a colored layer 3R. Next, the coloring layer 3R is subjected to a dye-proof treatment, and thereafter, the coloring layers 3G and 3B are sequentially formed in the same manner.

In the case of the printing method, screen printing, letterpress printing, lithographic printing, intaglio printing, etc. can all be adopted as in the case of ordinary multicolor printing. Intaglio printing is preferable from the viewpoint that fine printing is possible and the thickness of the colored layer 3 to be printed can be adjusted.

In the case of the electrodeposition method, first, an electrically insulating layer is formed on the support sheet 1, and electrodes corresponding to the patterns of the colored layers 3R, 3G, 3B are formed on the electrically insulating layer by photolithography or the like. . The release layer 2 described above is formed on this. Then, this is immersed in, for example, an R electrodeposition bath containing an R dye, and only the R electrode is energized to electrodeposit the R dye on the R electrode. This operation is repeated for the G electrodeposition bath and the B electrodeposition bath to form the respective colored layers. In the case of the electrodeposition method, since it is necessary to switch the R, G, and B electrodes, it is difficult to apply it to a dot type pattern, and it is mainly used for a stripe type color filter.

The protective sheet 5 is provided to protect the color filter layer 4, and during transportation and storage,
Any material may be used as long as it can protect the color filter layer 4. The protective sheet 5 prevents the color filter layer 4 from being damaged by friction due to roll winding, and also protects the color filter layer 4 from external force when it is rewound and handled.

As the protective sheet 5, for example, polyethylene terephthalate film, cellophane film, silicone coated paper, etc. can be conveniently used. The thickness of the protective sheet 5 is preferably about 10 μm to 100 μm. If the thickness is less than 10 μm, the protective performance is insufficient and wrinkles are likely to occur. When the thickness exceeds 100 μm, not only is the roll diameter increased when wound into a roll, but also when the roll is wound or unwound, a deviation due to a difference in the roll diameter with the color filter layer 4 is generated, which is not preferable. It is preferable that the color filter layer 4 is covered with the protective sheet 5 not by using an adhesive or the like, but by adhesion by simple deaeration or electrostatic adhesion.

In the transfer sheet of the present invention, as shown in FIG. 4, an adhesive layer 6 for adhering the color filter layer 4 to the transferred substrate 20 is formed between the color filter layer 4 and the protective sheet 5. It may have been done. In the transfer sheet 11 having the adhesive layer 6, the protective sheet 5 is peeled off to expose the adhesive layer 6, and the transfer sheet 11 having no adhesive layer is pressure-bonded with the substrate to be cured to cure the adhesive. When 1 is peeled off, the color filter layer 4 is transferred to the transferred substrate 20 side through the adhesive layer 6. Therefore, it is not necessary to form the adhesive layer on the glass plate which is the substrate to be transferred, and the manufacturing process of the color filter is further simplified.

If the adhesive layer 6 is transparent and has a strong adhesive force to the color filter layer 4 and hardly adheres to the release layer 2, the pressure-sensitive adhesive usually used in this field is used. Agent, heat-sensitive adhesive, or photo-curable adhesive can be used. UV curable adhesives in particular
It is preferable because it can be cured by irradiating ultraviolet rays from the back side of the glass substrate without requiring high temperature heating.

Examples of this adhesive include an acrylate resin, an epoxy resin, an ethylene-vinyl acetate resin,
Examples thereof include various compositions such as polyolefin resin, ethylene-carboxylic acid anhydride resin, and rubber resin. However, the same composition as the resist composition used for forming the colored layer of the color filter layer 4 can be used, except that a dye is used. It is preferable to use an ultraviolet-curable resin (acrylate resin) composition that does not contain such a composition. The adhesive layer 6 has a thickness of 1 μm to 50 μm.
The thickness is preferably in the range of μm, and is applied on the color filter layer 4 with a doctor knife coater, a roll coater or the like so that the film thickness becomes uniform. The applied adhesive layer 6 is
Subsequently, the protective sheet 5 shields the outside air and the outside light, so that it can be stored for a long time as a transfer sheet.

The support sheet 1 on which the color filter layer 4 has been transferred can be repeatedly used after producing the transfer sheet after removing the release layer 2.

[0032]

EXAMPLES The present invention will be described in more detail by way of examples. (Example 1) The transfer sheet 10 shown in FIG. 1 (without an adhesive layer) was manufactured by the following procedure. First step: A polyethylene terephthalate roll-wound sheet (thickness: 175 μm) was rewound in a dust-free chamber to obtain a support sheet 1. A mixture of polyvinyl alcohol 9 parts by weight diazo-based photosensitizer 1 part by weight water 90 parts by weight was applied to the support sheet 1 with a bar coater to a thickness of 0.1 μm, heated to 100 ° C. for 10 minutes, and then 200 mJ.
The peeling layer 2 was formed by irradiating with ultraviolet rays of / cm ² for hardening treatment.

Second step: The peeling layer 2 was removed in a rectangular shape for each color filter unit along both sides of the sheet facing each other, and an alignment mark was formed on the portion of the supporting sheet 1 without the peeling layer. The alignment mark is formed by applying R resist to a portion of the support sheet 1 from which the release layer is removed, prebaking at 70 ° C. for 20 minutes, and then performing R, G, and
A cross-shaped alignment mark corresponding to each B was exposed, and after development, post-baked at 150 ° C. for 30 minutes to form.

Third step: A pattern of the colored layer 3R (R pattern) was formed on the release layer 2. This pattern is R
After protecting the alignment mark with Kapton tape, apply R resist to the sheet surface using a bar coater.
After prebaking at 0 ° C. for 20 minutes, the alignment mark is exposed, and the R pattern is exposed in accordance with the alignment mark.
It was formed by post-baking at 0 ° C. for 30 minutes.

Fourth and fifth steps: Further, patterns of colored layers 3G (fourth step) and 3B (fifth step), G pattern and B pattern, respectively, were formed. The G pattern was formed by protecting the G alignment mark with a Kapton tape, applying G resist on the surface of the sheet on which the R pattern was formed, and treating in the same manner as in the case of the R resist. Then, the B pattern was formed in the same manner as the G pattern.

The color filter layer 4 of the obtained transfer sheet 10 has R, G, and B sides 200 on the release layer 2.
Pixels of square μm are formed at a distance of 20 μm from each other, and the colored layers 3R, 3G, and 3B are arranged in a triangle as shown in FIG. 3B so that colored layers of different colors are adjacent to each other. It was arranged. Each colored layer 3R, 3
The film thickness of G and 3B was 1.0 μm to 2.0 μm.

Sixth step: A polyethylene terephthalate film having a thickness of 50 μm was coated as a protective sheet 5 on the color filter layer 4, and the layer was placed inside to obtain a transfer sheet 10 product. In the obtained transfer sheet 10, the colored layers 3R, 3G, and 3B were arranged according to design values, the color filter layer was smooth, and a transport test was performed in a rolled state. As a result, the surface of the color filter layer was scratched. Was not recognized.

(Use Example 1) Using the transfer sheet of Example 1, the color filter layer 4 was transferred onto the transfer target substrate. 15
An adhesive layer 6 is formed on a low-expansion glass substrate (# 7059) 21 having a thickness of 0 mm × 150 mm × 1.1 mm, and a transfer target substrate 2 is formed.
It was set to 0. As the adhesive, an ultraviolet curable resin (acrylate resin composition) similar to the resist used for forming the colored layer 3 of Example 1 but containing no dye was used.
This adhesive was applied on the glass substrate 21 with a bar coater to a thickness of 3 μm and air-dried for 10 minutes to form an adhesive layer 6.

The color filter layer 4 was transferred onto the transferred substrate 20. Transfer sheet 10 obtained in Example 1
One unit of the color filter is cut off from the sheet, and the protective sheet 5 is peeled off while neutralizing with a static elimination brush, and the exposed color filter layer 4 is superposed on the adhesive layer 6 of the transferred substrate 20, and the roll is kept in this state. It was set on the hot plate of the press and preheated to 100 ° C. for 5 minutes. Then temperature 1
The adhesive layer 6 was cured by roll pressing at 00 ° C. and a pressure of 5 kg / cm ² and irradiating 800 mJ / cm ² of ultraviolet rays from the glass substrate surface.

When the support sheet 1 was peeled off, the peeling layer 2 was peeled off along with the support sheet 1, the color filter layer 4 having a high flatness was exposed, and the color filter 22 was obtained. In this color filter 22, all of the colored layers 3 were transferred without defects and showed good dimensional accuracy. Peeled support sheet 1
After the release layer 2 was removed, it could be used again for producing a transfer sheet.

Example 2 A transfer sheet 11 (having an adhesive layer 6) shown in FIG. 4 was manufactured. The first to fifth steps were performed according to the method described in Example 1 to form the color filter layer 4 on the support sheet 1 with the release layer 2 interposed therebetween.

Step 6: On this color filter layer 4, a UV curable resin (acrylate based resin) similar to the resist used for forming the colored layer 3 of Example 1 using a bar coater, but containing no dye is used. Resin composition) 3 μm thick
And was dried in air for 10 minutes to form an adhesive layer 6. Seventh step: A polyethylene terephthalate film having a thickness of 50 μm is coated as the protective sheet 5 on the adhesive layer 6, and the transfer sheet 1 is rolled with the layer inside.
It was set to 1.

(Use Example 2) Using the transfer sheet 11 of Example 2, the color filter layer 4 was transferred onto the transfer target substrate.
As the transfer target substrate, the transparent glass plate used in Use Example 1 was used as it was without applying an adhesive.

One unit of the color filter is cut out from the transfer sheet of Example 2, and the protective sheet 5 is peeled off while neutralizing with a static elimination brush, and the exposed adhesive layer 6 is superposed on the glass substrate to keep this state. Set on a hot plate of a roll press and preheated to 100 ° C. for 5 minutes. Next, the adhesive layer 6 was cured by roll pressing at a temperature of 100 ° C. and a pressure of 5 kg / cm ² and irradiating the surface of the glass substrate with ultraviolet rays of 800 mJ / cm ² .

When the supporting sheet 1 was peeled off after the irradiation of ultraviolet rays, the supporting sheet 1 and the peeling layer 2 were peeled together, and a color filter in which the color filter layer 4 was transferred onto the glass substrate was obtained. The peeled support sheet 1 could be used again for the production of the transfer sheet after removing the peeling layer 2.

In the transfer sheet 11 of Example 2, all the colored layers were transferred onto the transfer target substrate without defects during transfer. In addition, the color filter layer 4 may be damaged during storage, transportation, or the step of transferring to a glass substrate, or the colored layers 3R, 3 and 3 may be damaged.
The positions of G and 3B did not relatively shift.
Also, since it is not necessary to apply an adhesive to the glass substrate,
The manufacturing process of the color filter has been further simplified.

[0047]

EFFECT OF THE INVENTION In the transfer sheet for color filter of the present invention, since the release layer is made of photo-curing polyvinyl alcohol, it can be uniformly applied to the supporting sheet and has good adhesiveness with the supporting sheet, and moreover, it can be applied to the color filter layer. The releasability of is good. Therefore, each colored layer of the color filter layer can be transferred to the transferred substrate without loss. Further, since the color filter layer is covered with the protective sheet, the color filter layer is not damaged during rolling, storage, transportation and the like. If an adhesive layer for adhering the color filter layer to the transfer substrate is formed between the color filter layer and the protective sheet, there is no need to form an adhesive layer on the transfer substrate side, so that the manufacturing process Is further simplified. At this time, since the protective sheet is coated on the upper surface of the adhesive layer, the adhesive layer does not stick to the support sheet even when the transfer sheet is rolled. After transferring the color filter layer to the transparent substrate, the peeled support sheet can be reused in the production of the transfer sheet by removing the peeling layer without discarding.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a transfer sheet of the present invention.

2A to 2C are process diagrams showing an embodiment of a method of using the transfer sheet of FIG. 1 in the order of FIGS.

3A to 3C are plan views each showing an example of an array pattern of colored layers.

FIG. 4 is a cross-sectional view showing another embodiment of the transfer sheet of the present invention.

5A to 5C are plan views each showing an arrangement pattern of colored layers in a color filter.

[Explanation of symbols]

1 ... Support sheet, 2 ... Release layer, 3R, 3G, 3B ... Colored layer, 4 ... Color filter layer, 5 ... Protective sheet, 6 ... adhesive layer, 10, 11 ... Transfer sheet, 20 ... Transferred substrate, 22 ... Color filter.

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-2-176703 (JP, A) JP-A-4-75004 (JP, A) JP-A-5-341116 (JP, A) JP-A-5- 142410 (JP, A) JP-A-4-301602 (JP, A) JP-A-2-213849 (JP, A) JP-A-5-8345 (JP, A) JP-A-4-208940 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G02B 5/20-5/28

Claims (6)

(57) [Claims] 1. A transfer sheet for transferring a color filter layer in which colored layers of a plurality of colors are two-dimensionally arranged on a transfer substrate, and a release layer made of photocurable polyvinyl alcohol is formed on a support sheet. A transfer sheet for a color filter, in which the color filter layer is formed on the release layer, and the color filter layer is covered with a protective sheet. 2. The transfer sheet for a color filter according to claim 1, wherein the support sheet is made of a heat resistant synthetic resin. 3. The transfer sheet for a color filter according to claim 1, wherein the support sheet is made of a nickel iron alloy. 4. The support sheet is provided with an alignment mark for aligning each colored layer of the color filter layer or for aligning each colored layer with the transfer substrate. The transfer sheet for a color filter according to item 1. 5. The adhesive layer according to claim 1, wherein an adhesive layer for adhering the color filter layer to the transfer substrate is formed between the color filter layer and the protective sheet. Transfer sheet for color filters. 6. The transfer sheet for a color filter according to claim 5, wherein the adhesive layer is made of an ultraviolet curable adhesive.