JP2001202884A - Fluorescent substance copying film and method of copying the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a phosphor copying film and method of copying the phosphor which can get a good quality of fluorescent face using a simple process, in manufacturing a display using a phosphor as displaying media. SOLUTION: In this phosphor copying film, there are orderly laminated cushion layers containing thermoplastic high molecular compound as a main component, photosensitive phosphor contained layer containing at least phosphor and high molecular compound, and photosensitive adhesive layer containing photosensitive high molecular compound and high molecular compound having adhesiveness as a main component. The copying is carried out in atmosphere of relative humidity above 65% under heating and pressurizing conditions to obtain a copying stability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a phosphor transfer film used for forming phosphor pixels in a manufacturing process of a display using a phosphor as a display medium, and a transfer method thereof.

[0002]

2. Description of the Related Art In the recent information society, technical development of information transmission means has been remarkable. Along with this, technical progress has been remarkable in a display for displaying the transmitted information. The role of a display is important in how quickly and accurately information can be displayed and transmitted.

[0003] Depending on the type of display, the type of display depends on the type of display, such as a cathode ray tube (CRT) and a liquid crystal display (LC).
D), a plasma display (PDP), a plasma addressed liquid crystal display (PALC), an electroluminescence (EL), a field emission display (FED), and the like. Both methods basically use a phosphor (LC
D, PALC are used for backlight).

In particular, CRT, PDP, EL, and FED are systems in which color display is performed by the self-luminous color of the phosphor, so that the type of phosphor suitable for each system is required, and the formation state of the phosphor pixels is required. It greatly affects display performance. Further, since the method of forming the phosphor pixels affects the display price, the method of manufacturing the phosphor pixel is also important.

The development and improvement of the phosphor itself have been actively pursued so that the performance of the phosphor according to the characteristics of each display can be exhibited. There are still many problems to be solved in the cathode ray tube phosphor, which is said to be a mature product, and improvements are being made to improve performance such as luminance and color characteristics.

[0006] Regarding the method of forming the phosphor-containing layer, in the case of a CRT, a polyvinyl alcohol-ammonium dichromate (PVA-ADC) photosensitive agent or a polyvinyl alcohol-sodium dichromate (PVA-S) is used.
DC) Phosphor slurries prepared by dispersing phosphors of each color emitting red, green and blue in a photosensitive agent are directly applied to the entire surface of a glass substrate one by one and patterned (exposure / development / drying) Is repeated to form a phosphor pixel, and finally, baking is performed to remove an organic substance and form a patterned phosphor layer on a glass substrate.

[0007] In the case of PDP, a phosphor paste obtained by dispersing phosphors for emitting red, green, and blue light in polyvinyl alcohol, an acrylic polymer compound, or a cellulose polymer compound is used as a mass production means. The phosphor pixels are formed by printing. Furthermore, a photo method (photosensitive paste method) is used as a more accurate pixel formation method. In this case, a phosphor pixel is formed by performing patterning similar to that of a CRT using a photosensitive agent to which PVA-bichromate or diazonium salt used in the phosphor slurry method is added. In the case of the FED, the phosphor layer is formed by a similar patterning method.

[0008]

As described above, a phosphor slurry method or a phosphor paste method is used for producing a phosphor screen of a display using a phosphor. When using the phosphor slurry, the next phosphor slurry is applied on the first formed pixel, so the next color phosphor remains on the previously formed color pixel, which is also called background fog or fog. May occur. When the pixel in the background stain portion emits light, the pixel emits light of a mixed color, and the color purity is reduced, so that a clear image cannot be obtained.
This is a major problem in display performance.

In the case of the phosphor slurry method, the steps of slurry application, drying, patterning (exposure, development), and drying must be performed for each color phosphor in the manufacturing process. However, there has been a problem that the linearity is deteriorated, chipping occurs, and a defect occurs due to mixing of dust and foreign matter.

Further, in the phosphor slurry method, since it is difficult to control the thickness of the phosphor applied, it is necessary to provide a phosphor-containing layer with an optimum thickness in continuous production, but this causes variations in quality. I was Furthermore, in the phosphor slurry method, not only is the manufacturing apparatus itself large and expensive, but also the manufacturing process becomes very complicated,
There is a problem that the manufacturing cost increases.

In the case of the phosphor paste method, if a photosensitive paste is used, a problem similar to that of the phosphor slurry method occurs. In a screen printing method using a non-photosensitive phosphor paste, printing accuracy (position accuracy, shape, etc.) is used. Accuracy, film thickness accuracy), and there is a major problem that the color development characteristics deteriorate as in the case of the phosphor slurry method due to the non-uniformity of the phosphor pixel thickness and the contamination of other color pixels by the phosphor paste.

Therefore, in the present invention, a process which is simpler than the above-mentioned manufacturing method, and which is capable of manufacturing a phosphor screen free from variations in the thickness of the phosphor application and contamination of dust and foreign matter, is described below.
An object of the present invention is to provide a phosphor transfer film and a transfer method thereof.

[0013]

An object of the present invention is to provide a cushion layer mainly composed of a thermoplastic polymer compound on a support, a phosphor emitting a predetermined color and a photosensitive polymer compound. And a phosphor transfer film in which a photosensitive polymer compound and a photosensitive adhesive layer mainly composed of a tacky polymer compound are sequentially laminated.

Further, the phosphor-containing layer has a visible light region (450 to 7).
By adjusting the transmittance (50 nm) to 10 to 30%, it was found that the dispersion of the phosphor density was small and a high-quality phosphor surface could be produced.

Further, in consideration of the environment and workability, it is preferable that the adhesive polymer compound is a water-soluble or water-dispersible polymer compound. Furthermore, when the phosphor transfer film of the present invention is transferred to an adherend, the step of transferring and imparting the photosensitive phosphor-containing layer onto the adherend via the photosensitive adhesive layer is performed at a relative humidity of 65% RH or more. By transferring under an atmosphere and under heating and pressing conditions, a phosphor screen of stable quality can be manufactured.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The phosphor transfer film of the present invention comprises:
As shown in FIG. 1, a cushion layer 4, a phosphor-containing layer 3, and a photosensitive adhesive layer 2 are sequentially formed on a support 5, and a cover film 1 is provided to protect the photosensitive adhesive layer. The antistatic layer 6 may be provided on at least one surface of the support. The phosphor-containing layer and the adhesive layer have photosensitivity.

The phosphor transfer film of the present invention is used in one or more colors according to the characteristics of the display to be manufactured.
When manufacturing a display with two or more colors of phosphor screen,
After transferring and patterning the first color phosphor transfer film on the adherend, the second and subsequent colors are transferred and patterned, respectively.

As the support of the present invention, a conventionally known plastic film can be used. For example, polyethylene terephthalate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polycarbonate, triacetate and the like can be mentioned. Particularly, a polyethylene terephthalate (PET) film having high mechanical strength and excellent heat stability is preferable. The thickness of the support is not particularly limited.
A thickness of １５０150 μm is appropriate.

The plastic film has a surface resistivity of 108 to prevent dust from entering due to peeling charging.
It is preferably from 10 to 1010 Ω / cm ² . For this reason, it is preferable to use an antistatic treatment film as a support or to provide an antistatic layer 6 as shown in FIG. In the present invention, a cushion layer is provided between the support and the phosphor-containing layer. The cushion layer is provided on the adherend, and the light-absorbing layer, or the phosphor pattern or the like is already provided, and irregularities are present on the adherend surface. In this case, it is for surely transferring to the concave portion.

When a display having two or more colors of phosphor screens is manufactured, the second color is transferred onto the first color phosphor pattern. At this time, since the thickness of the phosphor pattern of the first color is usually 10 to 20 μm, depending on the material properties, it is necessary for the phosphor-containing layer to be uniformly transferred between the previous phosphor patterns by a cushion layer. Has a thickness of 10 to 100 μ
m is suitable. If it is less than 10 μm, it is difficult to transfer uniformly between patterns, and poor transfer (tenting) occurs at the bottom of the pattern. If it exceeds 100 μm, the thermal conductivity from the transfer roll is inferior, so that the cushion layer cannot be sufficiently softened at the time of transfer work, which causes transfer failure.

As the material for the cushion layer, any thermoplastic polymer compound may be used. For example, a saponified product of ethylene and an acrylate copolymer or a saponified product of styrene and an acrylate copolymer may be used. Examples of the copolymer include a copolymer, an ethylene-vinyl acetate copolymer, a low-density polyethylene, an ethylene ethyl acrylate copolymer, a copolymer of styrene and isoprene, and a copolymer of styrene and butadiene. These polymer compounds can be used alone, mixed in an appropriate combination, or laminated in an appropriate combination. If necessary, a plasticizer may be added for use.

Various auxiliaries can be added to the cushion layer as long as the effects of the present invention are not impaired. In particular, when the cushion layer is provided by coating, a leveling agent and various fillers (calcium carbonate, silica powder, titanium dioxide, etc.) can be added.

As the phosphor used in the phosphor-containing layer of the present invention, the following phosphors can be used according to the excitation energy of each display. As phosphors for CRT, ZnS: Ag, Cl, ZnS: Ag, Al
And the like, as green color phosphors, ZnS: Cu, Al, ZnS: Cu, A
u, Al, Zn ₂ SiO ₄ : Mn, etc., and Y ₂ O ₂
S: Eu, Zn ₃ (PO ₄ ) ₂ : Mn or the like can be used.

As a phosphor for PDP, BaMgAl ₁₄ O ₂₃ : Eu, BaMgAl ₁₀ O ₁₇ : Eu, etc. are used as blue light-emitting phosphors, and BaAl ₁₂ O ₁₉ : Mn, Zn ₂ SiO ₄ are used as green light-emitting phosphors. Mn, (Ba, S
_{r, Mg) O · aAl 2} O 3: Mn, (Zn, etc. Mn) ₂ SiO _4, as the red-emitting phosphor _{(Y, Gd) BO 3:} Eu, and the like (Y, Eu) ₂ O ₃ Can be used. As an inorganic EL phosphor, ZnS: Mn or the like is used as an orange light-emitting phosphor, and ZnS: Tb is used as a green light-emitting phosphor.
For example, CaGa ₂ S ₄ : Ce can be used as the blue light emitting phosphor.

As the phosphor for FED, ZnS: Ag, Y ₂ SiO ₅ : Ce or the like is used as a blue light-emitting phosphor, and ZnS: Cu, Al, ZnS: Au, Al, (ZnCd) is used as a green light-emitting phosphor. S: Cu, Al, ZnGa ₂ O ₄ : M
n, etc., as red-coloring phosphors, Y ₂ O ₃ : Eu, Y ₂ O ₂ S: Eu,
SrTiO ₃ : Pr or the like can be used.

As the photosensitive polymer compound referred to in the present invention, any polymer compound can be used as long as its solubility in water or a solvent changes before and after exposure to ultraviolet light or visible light. Considering the influence, it is preferable to use a polymer compound whose solubility in water changes. As long as it has such a property, even if a photosensitive group is present in the polymer compound molecule, a photosensitive agent is mixed with a non-photosensitive polymer compound having a crosslinking group. There may be.

Specific examples of the photosensitive polymer compound are shown below. (1) A composition comprising a water-soluble polymer compound such as gelatin, fish glue, gum arabic, and polyvinyl alcohol, and ammonium bichromate, potassium dichromate, and ammonium chromate. (2) A composition comprising a photosensitive ferric ion that gives ferrous ions upon exposure, such as ammonium ferric citrate and ammonium ferric oxalate, and a water-soluble polymer compound such as gelatin. (3) A composition comprising a diazo compound such as p-diazodiphenylamine and a diazo polymer compound obtained by condensing paraformaldehyde. (4) Gelatin, fish glue, gum arabic, polyvinyl alcohol, polyacrylamide, carboxymethylcellulose, hydroxyethylcellulose and other water-soluble polymer compounds, and p-aminodiphenylamine, benzine, dianisidine, tetrazonium salts of diisocyanate and other diamino compounds, or A composition comprising a p-diazodiphenylamine and a diazo polymer compound obtained by condensing paraformaldehyde.

(5) A composition comprising an azide compound such as 4,4'-diazidostilbenzene and sodium 2,2'-disulfonate and a water-soluble polymer compound such as polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone and gelatin. . (6) 4,4'-diazidostilbenzene, 4,4'-
A composition comprising a cyclized rubber of an azide compound such as diazide chalcone. (7) A composition of a quinonediazide compound such as naphthoquinone- (1,2) -diazidesulfonic acid ester and an alkali-soluble phenol formaldehyde polymer compound. (8) A composition comprising a polymer having a cinnamic acid group introduced into a molecule such as a cinnamic acid ester of polyvinyl alcohol and a sensitizer such as nitroacenaphthene, 1,2-benzoanthraquinone, and Michler's ketone. (9) A modified polyvinyl alcohol composition obtained by adding a photosensitive group such as a stilvinylilium group, a stilbazolium group, and a stilquinolium group to polyvinyl alcohol.

Although all of these photosensitive polymer compounds can be used, the photosensitive polymer compounds of (2) to (9) are considered as systems which do not generate pollutants such as chromium ions in consideration of environmental problems. It is preferred to use

The mixing ratio of the phosphor and the photosensitive polymer in the phosphor-containing layer of the present invention and the thickness of the phosphor-containing layer need to be changed depending on the type of the phosphor used.
In the present invention, the visible light region (450 nm to 7
These can be determined by adjusting the transmittance at 50 nm) to be 10 to 30%.

When the phosphor-containing layer is formed with a transmittance of less than 10%, the phosphor is present in an excessive amount.
At the time of baking, peeling of the phosphor pixel occurs, and the emission luminance of the phosphor pixel is reduced. This decrease in light emission luminance occurs because when the phosphor screen is viewed from the glass substrate side, light emission from near the phosphor pixel surface irradiated with the electron beam is prevented by phosphor excessively present inside the phosphor pixel. .

When a phosphor-containing layer having a transmittance of more than 30% is formed, the phosphor-containing layer is in a state where the phosphor is sparse, so that a pinhole defect occurs in the phosphor pixel or a sufficient light emission occurs. Brightness cannot be obtained.

Further, the blending ratio of the phosphor and the photosensitive polymer in the phosphor-containing layer of the present invention may be such that the phosphor / photosensitive polymer = 95/5 to 80/20 by weight. preferable. If the blending ratio of the phosphor is out of this range, the layer strength after photo-curing becomes weak, which may cause abrasion of the pixel surface during the development process or cause poor linearity of the pixel edge after the development. Become. Further, when the blending ratio of the photosensitive polymer compound is higher than this range, when forming the phosphor-containing layer having a predetermined transmittance, the phosphor-containing layer becomes thicker. When transferring the layer, defective transfer of the layer occurs, and defective firing or peeling of the phosphor pixels occurs during the firing process after forming the pixel.

The photosensitive adhesive layer in the present invention contains the above-mentioned photosensitive polymer compound and a tacky polymer compound as main components. When the photosensitive adhesive layer contains one or more kinds of polymer compounds having tackiness together with the photosensitive polymer compound, stable transferability and image reproducibility after development can be obtained. Originally, the adhesion between the phosphor layer and the adhesive layer is weak, and the phosphor layer and the adhesive layer are easily peeled off during the development. However, when the phosphor layer and the adhesive layer are photo-cured, the adhesion between the phosphor layer and the adhesive layer is increased, so that the image tends to remain.

When the photosensitive adhesive layer contains only a photosensitive polymer, the transferability to the adherend is not stable, so that the insufficiently adhered portion is peeled off in the developing step at the time of patterning. Image reproducibility of phosphor pixels is not stable. When containing only a polymer compound having adhesiveness,
Although the transferability to the adherend is stable, the adhesive layer in the non-image area is not removed. In addition, during patterning, the adhesive layer at the exposed portion is not photocured, and the adhesion to the adherend and the adhesion between the phosphor layer and the adhesive layer are poor, and the phosphor pixels flow down due to development. Increasing the adhesiveness of the resin in order to increase the adhesion of the image area to the adherend and the adhesion between the phosphor layer and the adhesive layer will result in thin phosphor stains on the surface of the adhesive layer remaining after development. Then, it becomes soil.

As the polymer compound having an adhesive property, any resin may be used as long as the phosphor transfer film of the present invention can be adhered to an adherend. High molecular compounds are preferably used. For example, as an index, the glass transition point (Tg) is about −40 ° C.
A polymer compound at a temperature of about 20 ° C. is preferable. When a polymer compound having a Tg in this range and a photosensitive polymer compound are used as main components, transfer stability can be improved, and background fouling due to a fluorescent substance can be achieved. And good image reproducibility can be obtained. Considering the step of removing organic matter at a high temperature after preparing the phosphor surface (baking removal), it is more preferable to use a polymer compound having excellent burning removal properties.

Examples of such high molecular compounds include acrylic acid resin, vinyl acetate resin, ethylene-vinyl acetate copolymer resin, styrene-acrylate copolymer resin, acrylate ester resin, vinyl acetate-acrylic acid copolymer resin. And so on. Further, it is preferably water-soluble or water-dispersible in consideration of miscibility with the photosensitive polymer compound, environment and workability.

The type of the polymer compound having tackiness is Tg.
The adhesive force differs depending on the difference, and the transfer performance, image reproducibility and the like change. Therefore, the compounding ratio to the photosensitive adhesive layer is appropriately adjusted. A preferred compounding ratio is 40/60 to 60/40 in terms of weight ratio of photosensitive polymer compound / adhesive polymer compound.

When the compounding ratio of the polymer compound having tackiness is increased, the unexposed portion of the photosensitive adhesive layer is inferior in development removal property, and the adhesive layer remains on the adherend. However, at this time, since the photosensitive polymer compound component has been completely removed by the developer, as long as a polymer compound having good sintering removability as described above is used, all of the photosensitive polymer compound is burned off during firing. Does not adversely affect the color development of the pixels.

The thickness of the photosensitive adhesive layer is preferably about 1 to 5 μm. When the thickness is in this range, transfer failure and firing failure are not substantially generated, and a uniform transfer layer can be obtained.
Various auxiliaries such as a leveling agent can be added to the phosphor-containing layer and the photosensitive adhesive layer to such an extent that the effect of the present invention is not impaired.

As the cover film of the present invention, similarly to the support, a conventionally known plastic film can be used. In order to stably peel the cover film when using the phosphor transfer film, a release layer may be provided on the surface in contact with the photosensitive adhesive layer. At this time, the peeling force between the photosensitive adhesive layer and the cover film releasing layer was 180 ° at a peeling speed of 300 mm / min for the cover film of the sample having a width of 25 mm.
° Measure the load when peeled, the value is 1.0 ~ 1
It is preferably 0.0 g / 25 mm.

The above-mentioned release layer can be formed of a urethane resin, a melamine resin, a silicone resin, or a copolymer or mixture thereof. The coating amount of the release layer is not particularly limited, but is preferably 0.5 to
It is preferably 5.0 g / m ² .

In the present invention, the phosphor transfer film is sufficiently softened in an atmosphere having a relative humidity of 65% RH or more, preferably 80% RH or more, and is sufficiently softened, and then heated and heated. When the image is transferred to the adherend by the transfer device under the pressure condition, it is possible to surely perform the good transfer.

In an atmosphere where the relative humidity is less than 65% RH, the transfer conditions (pressure, heating) need to be more tight.
Poor transfer stability. In particular, at 40% RH or less, uniform and stable transfer cannot be performed under practical conditions. By providing sufficient humidity to the photosensitive adhesive layer, good transfer can be performed under more practical and stable transfer conditions.

[0045]

By using the phosphor transfer film provided by the present invention in a display using a phosphor as a display medium, the production process can be greatly simplified and the production cost can be greatly reduced. Further, the accuracy of the obtained pattern is good, and the occurrence of defects can be remarkably improved.

Further, by using a phosphor transfer film provided with a phosphor-containing layer with an optimum film thickness in accordance with the display characteristics, the kind of the phosphor, and the characteristics, the conventional problems when applying the phosphor-containing layer are eliminated. The use of a transfer device also greatly simplifies the process of coating the adherend with the use of a transfer device to prevent unevenness in the thickness of the applied phosphor, dust, and foreign matter. In addition, phosphor pixels can be easily obtained with target characteristics controlled in advance with uniform performance.

According to the structure of the phosphor transfer film of the present invention, the phosphor-containing layer and the photosensitive adhesive layer of a predetermined color can be uniformly transferred onto the adherend. Then, by providing a photosensitive adhesive layer mainly composed of a photosensitive polymer and a polymer compound having tackiness, the adhesiveness between the adherend and the photosensitive adhesive layer, and the photosensitive adhesive layer and the phosphor-containing layer The adhesion of the solid becomes strong, pixels of stable quality are obtained by patterning,
Finally, a high quality phosphor surface can be manufactured.

In the phosphor transfer film according to the present invention, both the phosphor-containing layer and the adhesive layer have photosensitivity, a pattern can be reliably obtained in an exposed portion (necessary pixel portion) without defects, and a photo-exposed portion is not exposed. Since the reactive polymer compound component is completely removed in the developing step, there is no problem at all in the background color on the other color phosphor pixels and deterioration of the baking property.

[0049]

Hereinafter, the present invention will be described with reference to Examples.
The present invention is not limited to this.

Example 1 Here, an example of a method for producing a phosphor transfer film for a phosphor generally used for a CRT will be described. [Preparation of phosphor transfer film] 75 μm PET for support
Film (an antistatic layer is provided on the back surface: surface specific resistance 1)
08 Ω / cm 2) and an ethylene-vinyl acetate polymer compound (Elvacs EV550:
A layer made of Mitsui DuPont Polychemical Co., Ltd.) was provided on the support with a thickness of 40 μm by a melt extrusion method using a T-die.

Next, on one side of the 50 μm PET film, a melamine polymer compound (TESFINE 32) was used as a release layer.
4: Hitachi Chemical Polymer Co., Ltd.) at 2 g / m 2 to prepare a cover film. On the release layer of this cover film, a photosensitive adhesive layer made of the following composition 1 was provided in a thickness of 2 μm.

[0052]

[Table 1]

Subsequently, a phosphor-containing layer was provided on the adhesive layer. An organic photosensitizer (SBQ-modified PVA: stilbazolium group introduction rate 2.1 mol%, average degree of polymerization 1100, degree of saponification 80) is used as the photosensitive polymer compound, and the phosphor emits blue, green, and red light, respectively. A phosphor was used. Table 1 shows the types of phosphors and the composition ratio (weight ratio) between the photosensitive polymer compound and the phosphor.
Shown in The photosensitive polymer compound and the phosphor are mixed with a dispersant (Plus Coat RY-1: manufactured by Yoyo Chemical Industry Co., Ltd.) and water with a mixer (TK HOMO DISPER, manufactured by Tokushu Kika Kogyo Co., Ltd.) at 1500 rpm. The coating solution dispersed for 30 minutes under the conditions was applied and dried. At this time, in the phosphor-containing layer after drying, the visible light range (450 to 750 nm) measured by a colorimetric spectrophotometer (MCPD-2000: manufactured by Otsuka Electronics Co., Ltd.)
The amount of coating was adjusted so that the transmittance was within the range of 10 to 30%.

[0054]

[Table 2]

Then, the surface of the phosphor-containing layer and the surface of the cushion layer of the support prepared above were brought into contact with a roll surface temperature of 110.
A phosphor transfer film was prepared by laminating at 6 ° C. and a pressure of 6 kgf / cm 2 with a laminator.

(Preparation of phosphor screen of color cathode ray tube) Using the phosphor transfer film obtained as described above, a phosphor screen of a color cathode ray tube was prepared. A black light absorbing layer was formed on the inner surface of the panel glass by a conventionally known method. Next, the cover film of the blue light-emitting phosphor transfer film was peeled off, and the adhesive layer surface was humidified under a relative humidity of 80% RH.
Lamination was performed at f / cm2 using a laminator. At this time, the temperature of the panel glass was controlled at 60 ° C. Then, the support and the cushion layer were separated from the phosphor-containing layer, and a blue phosphor-containing layer for emitting blue light was provided on the black light absorbing layer via an adhesive layer. Next, the blue pixel portion was exposed through a shadow mask, and the unexposed portion was entirely removed from the adhesive layer by water development to obtain a blue pixel pattern.

Next, the cover film of the phosphor transfer film for emitting green light was peeled off, and transferred onto a blue pixel under the same conditions as for blue. After peeling off the support and the cushion layer, the green pixel portion was exposed through a shadow mask and developed with water to obtain a green pixel pattern.

Finally, the cover film of the red light emitting phosphor transfer film was peeled off and transferred onto the blue and green pixels under the same conditions as in the case of blue and green. After the support and the cushion layer were peeled off, the red pixel portion was exposed through a shadow mask and developed with water to obtain a red pixel pattern. In this way, a phosphor screen in which phosphors emitting blue, green, and red light were patterned on the black light absorbing layer was produced.

Then, an acrylic polymer compound as an intermediate film was applied on the phosphor surface to form a metal back layer of aluminum or the like. Thereafter, at the stage of heat bonding with the funnel glass, the organic matter was removed by firing to obtain a target color cathode ray tube. At this time, firing failure did not occur. The obtained color cathode ray tube was capable of uniformly forming high-luminance phosphor pixels, and was of good uniformity and high quality.

(Example 2) Except that only the photosensitive adhesive layer was changed to the following composition 2, composition 3, and composition 4 in the method of manufacturing a phosphor transfer film for CRT, the same configuration as in Example 1 was used. A phosphor transfer film was produced by the following steps: materials, and manufacturing processes. The composition 2 used was the same as the photosensitive polymer compound and the sticky polymer compound used in the example, but the blending weight ratio of the photosensitive polymer compound / the sticky polymer compound was 80/20. And the ratio of the photosensitive polymer compound is high.

Composition 3 is a photosensitive polymer compound used,
The type of the adhesive polymer compound is the same as that in the example, but the compounding weight ratio of the photosensitive polymer compound / adhesive polymer compound =
The ratio was 30/70, and the ratio of the adhesive polymer compound was high.

Composition 4 contains T as a sticky polymer compound.
The same as composition 1 except that only those having g = 37 ° C. were used.

[0063]

[Table 3]

[0064]

[Table 4]

[0065]

[Table 5]

With the phosphor transfer film using the composition 2, a color cathode ray tube could be produced without any problem similarly to the case where the composition 1 was used. Transfer of Phosphor-Containing Layer to Inner Surface of Panel Glass Under the same conditions as in Example 1, partial transfer failure occurred. Further, in patterning, the pixels in the exposed portions are easily loosened by the development process, and the pixels may be partially peeled off from the panel glass. Therefore, the transfer condition of the phosphor-containing layer is set to 140 ° C., 1.5 kgf / cm
By setting it to 2, a favorable phosphor-containing layer could be formed and a uniform pixel pattern could be obtained.

The phosphor transfer film using the composition 3 was able to produce a color cathode ray tube without any problem as in the case of using the composition 1. The transfer of the phosphor-containing layer to the inner surface of the panel glass was successfully performed without any problem under the same conditions as in Example 1. However, during patterning, the adhesive layer of the unexposed portion remained, and with this, the background of the phosphor was stained. By increasing the developing conditions, background stains were improved, but some pixels were thinned or peeled off.

As in the case of using the phosphor transfer film composition 1 using the composition 4, a color cathode ray tube could be manufactured without any problem. Good transfer could be performed under the same conditions as when the transfer composition 2 of the phosphor-containing layer to the inner surface of the panel glass was used. At the time of patterning, a background stain was generated. When the developing conditions were enhanced, pixel peeling was observed.

Comparative Example 1 A phosphor transfer film was prepared in the same manner as in Example 1 except that the ethylene vinyl acetate polymer compound serving as the cushion layer was not provided. The phosphor layer cannot be bonded,
A phosphor transfer film could not be manufactured.

Comparative Example 2 A phosphor transfer film was produced in the same manner as in Example 1 except that the photosensitive adhesive layer was not provided on the cover film. When the phosphor transfer film was heated and pressed under the same conditions as in Example 1 on the inner surface of the panel glass provided with the black light absorbing layer,
The phosphor layer could not be transferred. Various lamination conditions were examined, but none of them could be transferred. This is because the phosphor layer is in direct contact with the panel glass inner surface,
In addition, despite having to transfer, it does not have the adhesiveness required for panel glass transfer.

Comparative Example 3 A coating material was prepared from the composition 1 without blending a photosensitive polymer compound, and a phosphor transfer film was prepared. When heat and pressure were laminated on the inner surface of the panel glass provided with the black light absorbing layer under the same conditions as in Example 1, good transferability was obtained, and the phosphor could be uniformly applied to the inner surface of the panel glass. . However, exposure
In the development, unexposed portions were seriously soiled, and various development conditions were examined to improve this. However, practically usable pixels could not be obtained.

(Comparative Example 4) In Composition 1, a coating material was prepared without blending an adhesive polymer compound, and a phosphor transfer film was prepared. When heat and pressure were laminated on the inner surface of the panel glass provided with the light absorbing layer under the same conditions as in Example 1, the transferability was unstable as a whole. Condition.

As shown in the comparative examples above, the phosphor transfer film produced by deviating from the content of each layer of the phosphor transfer film specified in the present invention has a transfer performance to an adherend,
It has been found that this has an adverse effect on image reproducibility in pixel formation, and that it is difficult to stably form a good phosphor pixel pattern.

[0074]

[Brief description of the drawings]

FIG. 1 shows one embodiment of a phosphor transfer film provided by the present invention.

[0075]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover film 2 Photosensitive adhesive layer 3 Phosphor containing layer 4 Cushion layer 5 Support 6 Antistatic layer

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor, Yuki Suzuki 1551, Higashimatsuyama, Higashimatsuyama-shi, Saitama Prefecture Nippon Paper Industries Co., Ltd.Higashimatsuyama Office (72) Inventor, Norio Yabe 1551, Higashimatsuyama-shi, Higashimatsuyama, Saitama Prefecture, Japan F term (reference) 5C028 FF01 FF11 HH08 HH14

Claims (4)

[Claims] 1. A cushion layer mainly composed of a thermoplastic polymer compound on a support, a phosphor layer mainly composed of a phosphor emitting a predetermined color and a photosensitive polymer compound, and a photosensitive polymer. A phosphor transfer film in which a compound and a photosensitive adhesive layer mainly composed of an adhesive polymer compound are sequentially laminated. 2. The visible light region (450 to 750 nm) of the phosphor-containing layer.
The phosphor transfer film according to claim 1, wherein the transmittance of the phosphor is 10 to 30%. 3. The phosphor transfer film according to claim 1, wherein the adhesive polymer compound comprises at least one of a water-soluble or water-dispersible polymer compound having an adhesive property. 4. A process for transferring and applying a photosensitive phosphor-containing layer onto an adherend using a phosphor transfer film according to claim 1 through a photosensitive adhesive layer. Is transferred to an adherend under heating and pressurizing conditions in an atmosphere having a relative humidity of 65% RH or more.