JP2000040472A - Plasma display member and manufacture therefor and plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve display contrast, and to prevent cross talk in a discharge space by setting a stimulation value in an XYZ display color system of a barrier rib not more than a specific value, and setting a lengthwise directional recess/ projection of the barrier rib top part to a specific value range. SOLUTION: A back face glass substrate for a plasma display forming a barrier rib is sealed with a front glass substrate in the top part of a barrier rib to constitute a PDP(plasma display panel). A lengthwise directional recess/ projection of the barrier rib top part is controlled in 0.5 to 10 μm, more desirably, 0.5 to 5 μm to prevent cross talk of the plasma display. A stimulation value Y in an XYZ display color system of the barrier rib is set not more than 20 to improve display contrast. An optical density (reflection OD) value of the black part of the barrier rib is set not less than 1.3, more desirably, not less than 1.5, further desirably, not less than 1.6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display suitably used for a large television, a computer monitor, and the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Plasma display panels (hereinafter referred to as P
DP) is capable of high-speed display compared to liquid crystal display panels and is easy to increase in size, so that it has penetrated into fields such as OA equipment and public information display devices. It is expected that progress in such fields will be very high.

With the expansion of such applications, attention has been paid to color PDPs having high definition and a large number of display cells. The PDP generates a plasma discharge between the opposed anode and cathode electrodes in a discharge space provided between the front glass substrate and the rear glass substrate, and generates ultraviolet light from a gas sealed in the discharge space. Is applied to the phosphor in the discharge space to perform display. In this case, partition walls (also referred to as barriers or ribs) are provided in order to suppress the spread of the discharge to a certain area, perform display in a specified cell, and secure a uniform discharge space.

In the PDP, a discharge space is formed by sealing the rear glass substrate on which the partition walls are formed and the front glass substrate. However, cracks and poor sealing due to warpage of the entire glass substrate are generated. It is known that the occurrence of malfunctions such as crosstalk caused by minute unevenness existing on the top of the partition wall is also a serious defect. Eliminating the occurrence of such defects is a very important issue for improving the yield of PDP production and realizing an increase in the size thereof.

[0005] Further, the partition has a function of reflecting display light emitted from the phosphor layer to increase luminance, and
In terms of display quality, it must also contribute to increasing the contrast. Thus, there is a strong demand for a plasma display having a black partition having good surface smoothness that does not cause a malfunction such as crosstalk while sufficiently improving the display contrast effect.

JP-A-8-255563 describes a black partition, and JP-A-6-150828 describes a black partition in which the composition of an upper layer and a lower layer is changed.

[0007]

However, all the partitions have insufficient display contrast and insufficiently prevent crosstalk.

An object of the present invention is to provide a plasma display which has excellent display contrast and does not cause crosstalk in a discharge space.

Another object of the present invention is to provide a plasma display manufacturing method for efficiently manufacturing the above plasma display.

[0010]

That is, the present invention relates to a plasma display having a partition on a substrate, wherein the partition has a stimulus value Y of 20 or less in an XYZ color system, and has longitudinal irregularities at the top of the partition. Is 0.5 to 10 μm.

The present invention also relates to a plasma display having a partition on a substrate, wherein the partition is composed of at least two layers, and the stimulus value Y in the XYZ color system of the upper part of the partition is 20.
The following is a member for a plasma display, wherein the lower part of the partition is white or transparent.

The member for a plasma display of the present invention further has the following preferred mode.

(1) The partition has a stripe shape.

(2) The line width at the top of the partition wall is 5 to 80 μm.

(3) The partition walls have a pitch of 100 to 250 μm.
m and the height is 50 to 170 μm.

(4) The black portion above the partition walls has a size of 5 to 50 μm.
m, and a white portion (white or transparent portion) below the partition wall is 20 to 150 μm.

(5) The chromaticity coordinate values x and y of the partition or the upper part of the partition are 0.3 to 0.36, respectively.

(6) The partition wall has a glass transition point of 450 to 55.
It is made of a glass material having 0 ° C. and a softening point of 500 to 600 ° C.

(7) The partition walls are made of a glass material having the following composition in terms of oxide. Lithium oxide: 3 to 15% by weight Silicon oxide: 10 to 30% by weight Boron oxide: 20 to 40% by weight Barium oxide: 2 to 15% by weight Aluminum oxide: 10 to 25% by weight

(8) The partition wall has a glass transition point of 450 to 5
Glass material 50 having a softening point of 50 to 600C
To 90% by weight and 10 to 50% by weight of a filler.

(9) The filler is at least one selected from the group consisting of titanium oxide, alumina, barium titanate, zirconia, cordierite, mullite, and a high melting point glass material.

(10) The high melting point glass material has the following composition in terms of oxide. Silicon oxide: 15 to 50% by weight Boron oxide: 5 to 20% by weight Aluminum oxide: 15 to 50% by weight Barium oxide: 2 to 10% by weight.

(11) The partition walls are made of Ru, Mn, Ni, Cr,
Fe, Ti, Cu, Pb, Bi, Co metals or oxides thereof in a total content of 3 to 20% by weight.

(12) The softening point of the glass powder contained in the upper part of the partition is lower by 10 to 50 ° C. than the softening point of the glass powder contained in the lower part of the partition. With the above configuration, the plasma display of the present invention can display with high contrast and can prevent crosstalk.

The present invention also relates to a method for manufacturing a member for a plasma display, wherein a partition is formed on a substrate using a glass paste comprising glass fine particles and an organic component, wherein the glass paste is made of Ru, Mn, Ni, Cr, Fe, Ti,
A method for producing a member for a plasma display, comprising a metal of Cu, Pb, Bi, Co or an oxide thereof in a total amount of 3 to 20% by weight.

The present invention also relates to a method for manufacturing a member for a plasma display, wherein a partition is formed on a substrate by using a glass paste comprising glass fine particles and an organic component. In the paste to be formed, Ru, Mn, Ni, Cr, Fe, Ti, C
A method for producing a member for a plasma display, comprising a metal of u, Pb, Bi, and Co or an oxide thereof in a total amount of 3 to 20% by weight.

In the method for manufacturing a member for a plasma display of the present invention, the softening point of the glass powder contained in the paste forming the upper part of the partition is 10 times lower than the softening point of the glass powder contained in the paste forming the lower part of the partition. A temperature lower by 態 様 50 ° C. is included as a preferred embodiment.

According to the present invention, there is provided a plasma display using the above-described plasma display member.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION The partition wall of the plasma display of the present invention is characterized in that the stimulus value Y in the XYZ color system is 20 or less, and the unevenness in the longitudinal direction at the top of the partition wall is 0.5 to 10 μm. Is what you do.

The rear glass substrate for a plasma display having the partition walls is sealed with the front glass substrate at the top of the partition wall to form a PDP. The unevenness in the longitudinal direction of the top of the partition wall is 0.5 to 10 μm, more preferably 0.5 to 5 μm.
By controlling m, the cross talk of the plasma display can be prevented. Unevenness is 10μ
When m exceeds m, complete sealing becomes difficult, crosstalk occurs in the discharge space, and the function as a display is impaired due to erroneous discharge. Also, it is technically quite difficult to control the unevenness to less than 0.5 μm.

As a method of measuring the unevenness at the top of the partition wall, a stylus type in which the unevenness is sensed with a stylus can be used. The measurement is performed by setting a needle on the top of the partition wall, scanning in the longitudinal direction of the partition wall, and calculating the difference between the highest value and the lowest value of the measured value within the measurement range (this corresponds to Rmax described in JIS B0601). Do). It is preferable that the range of one measurement is at least 1 mm to 10 cm along the top of the partition wall, since data is hard to be a local numerical value. In the present invention, this operation is performed at nine measurement points, and the average value is defined as unevenness.

The unevenness in the longitudinal direction of the top of the partition wall includes “waviness” -like unevenness in the longitudinal direction of the plane constituting the apex and partial unevenness in the form of protrusions. Cause. In the case of the “undulation” shape, there are a case where the height is higher than the average height and a case where the height is lower than the average height, but both are defects. Assuming that the average height of the partition walls is h1, the height h2 to the top of the "undulation" shape and the height h3 to the bottom of the valley are the difference (h2-h).
3) is a problem, and in the case of a projection, a difference (h4−h1) from the height h4 of a portion protruding from the top of the partition wall is a problem.

In the present invention, the unevenness is 0.5 to 10 μm.
Controlling within the range of m is an essential requirement for avoiding the occurrence of defects such as crosstalk, but the preferred range of the numerical value differs depending on the line width of the partition top.

The plasma display of the present invention is preferably applied to a high aspect ratio and high definition plasma display having a top line width of 5 to 80 μm, a pitch of 100 to 250 μm, and a height of 50 to 170 μm. As the line width becomes narrower, it is preferable that the control of the unevenness in the longitudinal direction of the top be made stricter.

That is, when the top line width of the partition is 5 μm, it is preferable to control the unevenness in the longitudinal direction of the top of the partition to 3 μm or less, and when the line width of the partition is 80 μm, the unevenness is allowed to be 10 μm.

When the line width at the top of the partition is plotted on the x-axis and the unevenness in the longitudinal direction of the partition top is plotted on the y-axis, 75y = 190 + 7
The range below the straight line represented by the relational expression of x is preferable.
For example, in the case of a partition top line width of 40 μm, it is preferable to control the irregularities in the partition top longitudinal direction to 6.3 μm or less.

The partition wall of the present invention has a pitch of 1 as described above.
00-250 μm, height 50-170 μm, line width 5-8
0 μm, and the irregularities in the top longitudinal direction depend on the line width, but have a high aspect ratio and high definition controlled to 0.5 to 10 μm to prevent erroneous discharge and crosstalk, Is characterized in that the stimulus value Y in the XYZ color system is 20 or less, which contributes to the improvement of display contrast.

The partition walls are made of an inorganic material such as glass powder or ceramics. In this case, when the partition layer is white, the light emitted from the plasma display is reflected by the partition walls to improve the brightness of the display light. it can. However, when the partition walls are white, contrast is reduced because external light incident on pixels that do not emit light is reflected. By making the color of the partition walls black, reflection of external light can be suppressed, so that the contrast of the display can be improved.

The tristimulus values XYZ of the light source colors and the chromaticity coordinates x and y obtained therefrom are based on JIS Z8722 (method for measuring object color), JIS Z8717 (method for measuring fluorescent object color), and JIS Z8701 (XYZ table). Color display method and color display method using X ₁₀ Y ₁₀ Z ₁₀ color system).

As a device for measuring these stimulus values and chromaticity coordinate values, a color computer manufactured by Suga Test Instruments Co., Ltd. is generally used. The measured values of the present invention were measured using a color computer SM-7-CH (optical conditions; 45 ° irradiation,
(0 ° light reception).

The measurement sample is 80 mm square and 1.3 mm thick.
Each of the glass pastes was applied to a soda glass substrate having a dry thickness of 50 μm and baked at 570 ° C. for 30 minutes. Using this solid film fired sample, a C light (north window light) 2 degree field of view, a white plate as a reference (barium sulfate as a standard product, X = 91.06, Y = 93.0)
1, Z = 106.90). Prior to the measurement, a white plate was placed only on the soda glass substrate, and zero adjustment was performed on the sample table. The measurement sample was placed on a sample table having a measurement hole of 12 mmφ with the fired sample surface facing the light irradiation direction, and a white plate was placed on the glass substrate side. In the present invention, three positions were measured while changing the position of the measurement sample, and the average value was used as the measured value.

The stimulus value Y must be 20 or less, preferably 2 to 20, and more preferably an upper limit of 10
Or less, more preferably 5 or less. Stimulus value Y is 20
If it exceeds, it becomes grayish, and the contrast and color purity decrease. When the chromaticity coordinates are obtained based on the tristimulus values XYZ, the values of x and y are 0.3 to 0.
By setting to 36, the color purity of the emission color of the plasma display can be improved.

The reflection OD value of the partition wall of the present invention is preferably 1.3 or more. Using the same sample as that used to measure the stimulus value Y value, the optical density (reflection OD) value of the black portion is 1.3 or more, more preferably 1.5 or more, and still more preferably 1.6 or more. Here reflection OD value, when the reflected light intensity incident light intensity and I ₀ was I -log (I /
I ₀ ). A Macbeth reflection densitometer RD-918, which is a densitometer for printing, can be used for the measurement. If the reflection OD value is 1.3 or less, the same problem as in the case where the stimulus value Y in the XYZ color system exceeds 20 occurs, which is not preferable.

The partition is formed by using a glass paste containing glass fine particles and an organic component. The glass paste is applied on the substrate in consideration of the height of the partition walls to be formed and the firing shrinkage, thereby forming a coating film having a predetermined thickness. Depending on the method of applying the glass paste, there are cases where a single application step can be completed and cases where a plurality of application steps are repeated to form a coating film having a predetermined thickness. To obtain a predetermined thickness by repeating the coating process,
It is also easy to change the properties of the glass paste used.

One of the objects of the present invention is to control the stimulus value Y in the XYZ color system of the baked partition to 20 or less in order to improve the contrast of the display, that is, to obtain a blackened partition. is there. As a method of blackening the partition walls in this way, there are a case where the entire partition walls are blackened and a case where only the upper part (part) of the partition walls is blackened, but the object of the present invention is achieved by any method. be able to.

When the entire partition is blackened, it is possible to use a single glass paste, or to use a plurality of glass pastes having different structures and particle size distributions of glass fine particles. It is also possible to form a coating film having a different thickness.

In order to realize, at the same time as the blackening, the restriction of the longitudinal direction of the top of the partition wall to 0.5 to 10 μm, which is another configuration of the present invention, it is necessary to control the particle size distribution of the glass fine particles and use the same. The control of the thermal properties of the glass material to be applied may be applied to the entire coating film, but may also be applied only to the upper coating film constituting the necessary partition top.

When only the upper part of the partition is blackened, the partition is composed of at least two layers, the stimulus value Y in the XYZ color system of the upper part of the partition is 20 or less, and the chromaticity coordinates x and y are each 0.3 to 0.3. 0.36, and the unevenness in the longitudinal direction at the top of the partition wall is 0.5 to 10 μm. That is, in order to form a partition with at least two layers, glass pastes having different compositions are used.

The simplest two-layer partition having a preferable structure is a stimulus value Y having a thickness of 5 to 50 μm and constituting the upper part.
Is 20 or less, and the lower layer 2
It consists of a white or transparent layer part having a thickness of 0 to 150 μm. When the thickness of the upper portion is 5 μm or less, the film becomes too thin and the degree of blackness is not sufficient, and the unevenness in the longitudinal direction of the top becomes too coarse. On the other hand, when the thickness exceeds 50 μm, it is difficult to completely match the thermal expansion coefficients of the upper layer and the lower layer, and disconnection (cutting) and cracks of the partition are generated during the cooling process after firing, which is not preferable.

Although it is possible to further increase the number of layers constituting the upper and lower portions, the thickness of the upper black layer is 5
It is preferably in the range of ５０50 μm.

The partition having such a structure exerts the effect of improving the display contrast in the black layer above the partition, and the white partition below reflects the light emitted from the phosphor layer to contribute to the improvement of the luminance. Thus, it is possible to obtain a plasma display having high luminance and good contrast.

The partition of the plasma display is manufactured by forming a partition pattern and then firing. The partition pattern is formed by a screen printing method, a sand blast method, a photosensitive paste method, or the like.
The production of the preferred partition wall of the present invention is not limited to the pattern formation method. However, it is preferable to use a photosensitive paste method as a method capable of producing a high-aspect-ratio, high-definition, rectangular or trapezoidal partition wall with good reproducibility and adapting to a large display.

Since the plasma display partition is formed on a glass substrate, it is necessary that the glass material serving as a component of the glass paste be melted at a temperature lower than the glass transition point of the glass substrate. Conventionally, as a glass material having such a temperature characteristic, lead oxide or bismuth oxide has been used.
Those containing 0% by weight or more have been used.

The partition wall of the present invention has a glass transition point of 450 to 450.
It is preferable to be made of a glass material having a softening point of 550 ° C and a softening point of 500 to 600 ° C. Examples of the glass material having such thermal characteristics include a glass material having the following composition in terms of oxide. Lithium oxide 3 to 15% by weight Silicon oxide 10 to 30% by weight Boron oxide 20 to 40% by weight Barium oxide 2 to 15% by weight Aluminum oxide 10 to 25% by weight Thus, a glass material containing 3 to 15% by weight of lithium oxide In addition to making it easier to control the softening point and the coefficient of thermal expansion, the use of a resin makes it possible to lower the average refractive index of glass. Can be easily reduced.

The amount of the alkali metal oxide added is 15
% By weight or less, more preferably 10% by weight or less. If it exceeds 15% by weight, the alkali metal evaporates during the discharge, causing a problem that the discharge characteristics are deteriorated, and the coefficient of thermal expansion of the glass becomes too high, so that the matching with the glass substrate becomes difficult.

In the above composition, sodium oxide or potassium oxide may be used instead of lithium oxide. However, lithium oxide is preferred in view of the pot life of the paste, heat characteristics, discharge characteristics, and little evaporation during sintering. In the case of using potassium oxide, there is an advantage that the refractive index can be controlled with a relatively small amount of addition. Therefore, among the alkali metal oxides, addition of lithium oxide and potassium oxide is effective.

The silicon oxide is preferably blended in the range of 10 to 30% by weight, and if less than 10% by weight, the denseness, strength and stability of the glass layer are reduced, and the thermal expansion coefficient is desired. The value deviates from the value, and a mismatch with the glass substrate easily occurs. On the other hand, if it exceeds 30% by weight, the softening point becomes too high, and there is a problem that it is difficult to bake the glass substrate.

It is preferable that boron oxide is blended in the range of 20 to 40% by weight. If it exceeds 40% by weight, the stability of the glass is reduced. Boron oxide is used to make glass powder 80
It melts at a temperature of about 0 to 1200 ° C., and even if it contains a large amount of silicon oxide, the baking temperature can be controlled in the range of 530 to 580 ° C. by blending boron oxide, and the electrical insulation, strength, coefficient of thermal expansion, insulation It does not impair the electrical, mechanical and thermal properties such as the denseness of the layer.

The barium oxide is preferably blended in the range of 2 to 15% by weight. If it is less than 2% by weight, it is difficult to control the glass baking temperature and the electrical insulation. On the other hand, if the content exceeds 15% by weight, the stability and the denseness of the glass layer decrease.

The aluminum oxide is preferably blended in the range of 10 to 25% by weight. Aluminum oxide is added to increase the strain point of the glass, stabilize the glass composition, and extend the pot life of the paste. 10% by weight
If it is less than 10, the strength of the glass layer decreases. If it exceeds 25% by weight, the heat-resistant temperature of the glass becomes too high, so that it is difficult to bake on the glass substrate. In addition, the dense insulating layer
It becomes difficult to obtain at the following temperatures.

In addition to these components, zinc oxide, calcium oxide or magnesium oxide may be added in terms of oxide.

In this case, it is preferable to add zinc oxide in a range of 2 to 15% by weight. If it is less than 2% by weight, there is no effect on improving the denseness of the insulating layer. If it exceeds 15% by weight, the temperature for baking on the glass substrate becomes too low to control, and the insulation resistance is undesirably low.

The calcium oxide is preferably blended in the range of 2 to 13% by weight. It is added to facilitate melting of the glass and control the coefficient of thermal expansion. If it is less than 2% by weight, the strain point will be too low. If it exceeds 13% by weight, the baking temperature becomes too high, which is not preferable.

The magnesium oxide is preferably blended in the range of 1 to 15% by weight. Magnesium oxide is added to facilitate melting of the glass and control the coefficient of thermal expansion. If it exceeds 15% by weight, the glass tends to be devitrified, which is not good.

The glass material may contain titanium oxide, zirconium oxide and the like, but the amount is preferably less than 5% by weight. Zirconium oxide is effective in controlling the softening point, glass transition point, and electrical insulation of glass.

As the inorganic fine particles used in the glass paste, in addition to 50 to 90% by weight of the glass material having the above-mentioned characteristics, the softening point as a filler has a softening point of 550 to 120%.
High melting point glass or ceramics at 0 ° C, more preferably 650 to 800 ° C, can be added in an amount of 10 to 50% by weight. By adding these filler components, the shrinkage ratio during firing is reduced, and the shape retention and accuracy of the partition pattern are improved. Further, the addition of these fillers is preferable in maintaining the strength of the obtained partition walls. When the amount of the filler is less than 10% by weight, the effect of reducing the firing shrinkage and controlling the thermal expansion coefficient is small. On the other hand, if the filler content exceeds 50% by weight, the partition walls after firing will be inferior in terms of denseness, the strength of the partition walls will decrease, and defects such as peeling or falling off of the partition walls may occur. Further, adsorption of a small amount of moisture and organic components remain in the partition walls, which causes deterioration of discharge characteristics.

The filler used in the present invention is at least one selected from the group consisting of titanium oxide, alumina, barium titanate, zirconia, cordierite, mullite, and high melting point glass powder. As the high melting point glass powder, one containing the following composition in terms of oxide is preferably used. Silicon oxide: 15 to 50% by weight Boron oxide: 5 to 20% by weight Aluminum oxide: 15 to 50% by weight Barium oxide: 2 to 10% by weight.

As the high melting point glass powder, a glass powder containing 15% by weight or more of silicon oxide and aluminum oxide is preferable, and the total content of these should be 50% by weight or more in the glass powder. It is effective to give.

In the case of a photosensitive paste, when a high melting point glass powder is used as a filler, if the difference in refractive index from the glass material is large, matching with the average refractive index of the organic component becomes difficult, and the pattern formability deteriorates. The difference between the refractive index of the high melting point glass powder and the refractive index of the low melting point glass material is preferably in the range of ± 0.05, and it is important to consider it in the composition of the composition.

The partition of the present invention is made of Ru, Mn, Ni, C
r, Fe, Ti, Cu, Pb, Bi, or Co metal or a black pigment composed of an oxide thereof in a total amount of 3 to
It is preferred to contain 20% by weight. These black metals or oxides are components added to make the partition walls have a desired stimulus value of Y20 or less. As constituents of the glass fine particles for forming partition walls, in the same powder state as glass materials and fillers, etc. They may be mixed and used, or may be melted at the same time as the production of the glass material and used as a uniform and homogeneous molten mixture.

The glass paste used for forming the partition walls is
Glass transition point 450-550 containing lithium oxide
When only the glass material having a softening point of 500 to 600 ° C. is contained, a transparent partition wall is formed, and when the glass material and the filler component are contained, a white partition wall is obtained. Further, when the above-mentioned metals or oxides thereof are added, a blackened partition wall can be obtained.

The particle size of the glass material used in forming the partition wall of the present invention is selected in consideration of the line width and height of the partition wall to be manufactured and the smoothness of the top of the partition wall. As a result of intensive studies on the particle size and distribution of the glass material, the particle size distribution of the glass material was plotted as frequency (%) on the vertical axis and particle size (μm) on the horizontal axis.
When the particle size distribution is not a mere normal distribution but has at least two peaks, the filling property is good and the coating property is excellent. Further, when the photosensitive paste is used, light scattering in the film is suppressed,
It has been found that the total light transmittance is high and the pattern formability is excellent.

The glass material is produced through the steps of adjusting the prepared raw materials, melting, pulverizing, classifying, and drying. Its particle size distribution is controlled in the milling and classification process.
For the pulverization, a method such as a ball mill or a jet mill is used. Classification is performed by dry classification such as sieving or airflow classification. The particle size distribution of the obtained fine particles can be measured by a laser diffraction scattering method. For example, a particle size distribution analyzer HRA9320 manufactured by Microtrac Co., Ltd.
The measurement conditions when using -X100 are as follows. Sample amount: 1 g Dispersion condition: Ultrasonic dispersion in purified water for 1 to 1.5 minutes. If it is difficult to disperse, it is performed in a 0.2% sodium hexametaphosphate aqueous solution. Particle refractive index: changed depending on the type of glass (1.6 for lithium) Solvent refractive index: 1.33 Number of measurements: 2 times.

Generally, the adhesion of particles depends on the surface area. The smaller the particle size, the easier it is to agglomerate, so the smaller the particle size, the more difficult it is to disperse uniformly in the paste, and when forming a coating film, voids are likely to be formed and the desired pattern characteristics cannot be obtained. On the other hand, if the particle size is too large, depending on the firing temperature, irregularities may occur at the tops of the partition walls after firing, and a gap may be formed between the partition and the front plate at the time of sealing, causing crosstalk.
A paste having good filling properties into the paste and little cohesiveness is obtained, and the particle size of the glass material having no problem of unevenness or foreign matter on the top of the partition wall after firing is 1.5 to 7 μm, and the maximum particle size is 7 to 40 μm. When the average particle size is less than 1.5 μm, the powder has high cohesiveness, and the filling property, coating property, and pattern forming property are deteriorated. On the other hand, if it is larger than 7 μm, the unevenness of the top of the partition wall after firing becomes large, so that there is a problem that crosstalk occurs. The average particle size is 1.5 to 7 μm, more preferably 2 to 5 μm. In particular, the average particle size of the glass material when used for forming the upper part of at least two-layered partition walls is 4
It is preferable that the thickness be not more than μm.

If the maximum particle diameter is less than 7 μm, the filling property, the coating property and the pattern formability are deteriorated. If the maximum particle diameter is more than 40 μm, there arises a problem that irregularities at the top of the partition wall after firing and foreign matters remain in the discharge space. It is desirable that the maximum particle diameter is 7 to 40 μm, more preferably 10 to 30 μm, because the filling property to the paste, the coating property, and the pattern forming property are good. However, it is preferable that the maximum particle diameter of the glass material when used for forming the upper portion of the partition having at least two layers is kept at 10 μm or less.

The unevenness in the longitudinal direction at the top of the partition wall is 0.5 to 10
As a problem on the glass material side which is a composition factor of the glass paste for controlling to μm, it is preferable to control the average particle size and the maximum particle size of the glass material and to lower the softening point of the glass material. .

That is, the average particle size of the glass powder preferably applied to the glass paste for forming the partition walls is 1.5 to 7 μm.
m, and more preferably 2 to 5 μm. In order not to generate irregularities of 10 μm or more at the tops of the partition walls, considering the distribution of the particle size of the glass powder, the average particle size of the glass material added to at least the glass paste forming the upper portions of the partition walls is preferably 4 μm or less. The maximum particle size is 10 μm
The following is preferred.

As described above, the particle diameter of the glass material contained in the coating film of the glass paste forming the top of the partition wall is controlled because not all of these low melting glass materials are completely melted in the firing step. It is because of that. In the firing process, it is considered that the organic components of the glass paste volatilize due to thermal decomposition, etc., and the glass materials undergo a process of melting and fusing with each other to be integrated. In this case, a glass material having a large particle size may be fused without being completely melted, and if this occurs on the surface, poor adhesion may occur, which may cause unevenness.

Further, in the present invention, the softening point of the glass material contained in the glass paste forming the top of the partition is preferably 10 to 50 ° C., more preferably 10 to 50 ° C. than the glass material contained in the glass paste forming the lower part of the partition. 10
It is desirable to lower the temperature by 30 ° C. The glass material preferably used for forming the partition walls has a glass transition point of 450
The softening point is in the range of 500 to 600 ° C. in the range of 〜550 ° C., but the glass paste of the upper layer applied to form the top of the partition is more preferable than the glass material of the paste forming the lower part of the partition in these ranges. It is preferable to set the softening point of the glass material to be low so as to prevent the occurrence of agglomeration due to insufficient melting in the firing step as described above. The setting of the temperature in the firing step is an important condition, but defects such as insufficient melting due to a slight difference in temperature and excessively shrinking or shrinking of the partition wall shape due to excessive firing occur. Usually, firing is performed at a temperature 30 to 70 ° C. higher than the softening point of the glass material contained in the paste. A glass material having a low softening point is used for forming the top of the partition wall, and the difference between the softening point and the softening point is increased at a set firing temperature so that complete melting can be performed to form a smooth top. Of course, it is necessary to set the temperature while paying sufficient attention to the occurrence of dripping.

The thermal characteristics of the glass powder constituting the glass paste can be controlled by optimizing the types and amounts of the components, and can be adjusted within the respective preferable ranges.

The effect of lowering the softening point of the glass material contained in the glass paste forming the top of the partition can be enhanced by using together with the condition of controlling the average particle size of the glass powder to 4 μm or less.

The partition shape includes a stripe shape and a lattice shape. The plasma display according to the present invention, which has good contrast and does not generate crosstalk during discharge, is applicable to any type of partition.
In particular, in the case of having a stripe-shaped partition, the degree of unevenness in the longitudinal direction of the partition top has a significant influence on the display performance of the plasma display.

The plasma display of the present invention having a partition having a stimulus value Y of 20 or less in the XYZ color system of the partition and having a vertical unevenness at the top of the partition of 0.5 to 10 μm has the above-mentioned thermal characteristics and It is manufactured using a glass paste composed of glass particles having a particle size distribution and an organic component. The glass particles include Ru, Mn, Ni,
It is characterized in that a metal of Cr, Fe, Ti, Cu, Pb, Bi or Co or an oxide thereof is preferably contained in a total amount of preferably 3 to 20% by weight. As described above, these metals or oxides thereof may be used in combination with a glass material or a filler component to form glass fine particles, but may be used by melting and mixing when forming a glass material. it can.

The black partition walls of the present invention include the shape, particle size distribution, and content of glass fine particles in the partition paste, the type, amount, and method of black pigment, and the type and content of organic components contained in the paste. It is obtained by strictly controlling the amount and the like in a well-balanced manner. Since the evaporating property (debinding property) of the organic component during firing and the firing shrinkage rate have a subtle effect, it is necessary to select the glass fine particles, the black pigment, and the organic component, and to select the firing conditions.

The feature of the present invention is that, at the stage of the glass fine particles containing the black pigment component and the paste containing them as a component, they exhibit a white or gray color. The partition shown is obtained. Therefore, even in the case of a photosensitive paste using these glass particles as a component, it is white or gray at the coating film stage, so that it is possible to sufficiently transmit ultraviolet rays for patterning. It can be light cured to the bottom.

The present invention is based on the finding of a black pigment which turns black after firing. Black pigments having such characteristics are Ru, Mn, Ni, Cr, Fe, T
Metals of i, Cu, Pb, Bi, Co or oxides thereof. The mechanism of blackening after firing is not clear. Even if several types of these metals or oxides are contained in the glass fine particles, in the state of fine particles, light is scattered due to the powder, and the white or gray color is exhibited. However, it is presumed that light is absorbed and blackened when the dense partition walls are formed by firing.

In order to function as a black pigment, the above-mentioned metals or their oxides can be mixed with a mixture of glass powder and filler. Further, a powder produced by adding and melting a black pigment component in the process of producing the glass powder can also be used. In the case of a melt-mixed powder, it is easy to control the particle size distribution of the glass fine particles. Further, the addition amount of the black pigment is smaller than that in the case of simple mixing, and it is preferable because a uniform black partition wall without unevenness can be obtained.

These metals or their oxides to be simply mixed and melt-mixed may be used not only in one kind but in several kinds. However, the total of 3 to 20% by weight can maintain the function of the paste and obtain it. It is preferable because it is excellent in controlling the blackness of the partition walls. More preferably, 5
１５15% by weight. If the content is less than 3% by weight, the blackness of the partition walls becomes weak and looks gray, and there is no contrast improving effect. On the other hand, if it is more than 20% by weight, it becomes difficult to increase the softening point of the glass or to match the coefficient of thermal expansion with the glass substrate.

The partition intended for the present invention can be manufactured by various methods. Means for blackening the partition walls (blackening) for setting the stimulus value Y in the XYZ color system to 20 or less (blackening) and means for controlling the unevenness in the longitudinal direction of the top of the partition walls to 0.5 to 10 μm (smoothing) are realized. All of the methods can be applied in combination.

By using a single paste that satisfies the conditions of blackening and smoothing, it is possible to form a partition in which the entire partition is black and the top of the partition is smooth. In this case, although the entire partition is black, it is also possible to apply glass fine particle conditions for smoothing the partition top only to the paste forming the partition top.

As a means for efficiently imparting and separating functions as described above, it is preferable to comprise at least two layers, and in particular, to provide a blackening function and a partition on the upper layer having a thickness of 5 to 50 μm which forms the top. It is preferable to impose a function of controlling the unevenness in the longitudinal direction of the top.

That is, the glass paste forming the lower part of the partition wall, which is a layer having a thickness of 20 to 150 μm, is a glass material having a particle size and a distribution which provide the above-mentioned preferable thermal characteristics, excellent filling properties, coating properties and pattern forming properties. Alternatively, it is composed of glass fine particles composed of a glass material and a filler and an organic component, and is applied by a known method. This forms a pattern or sintering together with the upper layer of the partition applied thereon to form a transparent or white partition layer.

The black portion at the upper part of the partition wall is 5 to 50 μm, and the glass paste forming this layer is made of Ru, Mn, N
Glass fine particles containing a metal of i, Cr, Fe, Ti, Cu, Pb, Bi or Co or an oxide thereof in a total amount of 3 to 20% by weight are contained. Furthermore, the black portion forming this upper part has irregularities in the longitudinal direction of the top of the partition wall of 0.5 to
In order to function as a layer controlling the thickness to 10 μm, it is important to adjust the average particle size and the maximum particle size of the glass material to be used within the above preferable ranges.

Furthermore, in order to control the unevenness in the longitudinal direction of the top of the partition wall to a preferable range, the softening point of the glass material contained in the glass paste forming the upper part is 10 to 50 ° C. lower than the softening point of the glass material forming the lower part. , More preferably lower by 10 to 30 ° C.

When the partition pattern is formed by a screen printing method, a glass paste containing a glass material for forming the lower portion and a filler is applied to a thickness of 20 to 150 μm, dried, and then the particle size is controlled and the softening point is further reduced. Material, filler and Ru, Mn, N
A glass paste containing a metal of i, Cr, Fe, Ti, Cu, Pb, Bi, Co or an oxide thereof in a total amount of 3 to 20% by weight is applied to a thickness of 5 to 50 μm, dried, and fired. The stimulus value Y in the desired XYZ color system is 20 or less, and the unevenness in the longitudinal direction of the partition wall is 0.5 to
It is possible to obtain a partition of 10 μm. However, there is a problem that it is difficult to manufacture a high-aspect-ratio, high-definition partition wall due to a precision problem inherent in the screen printing method.

The present invention can also be applied to a method of forming a solid film having two layers by using a screen printing method or a known film forming coating method, and forming a pattern by a sandblast method. Further, at least two of the present invention are prepared by a photosensitive paste method.
The upper layer of the partition has a stimulus value Y of 20 or less in the XYZ color system, and the top of the partition has irregularities in the longitudinal direction of 0.5.
Partition walls having a size of 10 to 10 μm can be formed.

In the photosensitive paste used in the present invention, a preferred photosensitive organic component is a photo-insolubilized type which basically comprises a photosensitive monomer, a photosensitive oligomer or polymer, and a photopolymerization initiator. In contrast to such a photosensitive organic component, the glass fine particles serving as the partition wall component, in addition to the requirements for the filling property and the applicability, have additional problems such as consistency of the average refractive index for increasing the light transmittance. Thus, a glass material whose composition ratio is proportioned within the range described above can be blended. In this case, the entire partition may be formed using a photosensitive paste containing a black pigment. A photosensitive paste containing a glass material and a filler is applied to the lower layer of the partition, and Ru and Mn are formed on the upper layer. , Ni, Cr,
A method of applying a photosensitive paste containing a total of 3 to 20% by weight of a metal of Fe, Ti, Cu, Pb, Bi or Co or an oxide thereof may be used.

A photosensitive paste coating film having a simple one-layer structure or at least a two-layer structure is subjected to pattern exposure and development in a similar manner to form a partition pattern, which is baked to obtain a desired partition. it can. Ru, Mn, Ni, C
At this stage, the photosensitive paste containing a metal of r, Fe, Ti, Cu, Pb, Bi, Co or an oxide thereof in a total amount of 3 to 20% by weight is grayish at this stage. Therefore, it has sufficient sensitivity to function as a photosensitive paste. Through the firing step, the stimulus value Y reaches 20 or less and takes on a black color.

Further, by using a glass material having a lower softening point than that of the lower glass material for the glass paste forming the upper portion of the partition walls, the melting of the upper layer glass material proceeds more completely in the firing step, and the unevenness of the surface is improved. Can be further reduced, the contrast can be improved by blackening, and a plasma display capable of performing display without crosstalk can be manufactured.

[0100]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments. However, the present invention is not limited to these. In addition, the concentration (%) is% by weight unless otherwise specified.
It is.

(Example 1) As a glass material (A), the composition in terms of oxide was 6.7% of lithium oxide, 22% of silicon oxide, 32% of boron oxide, and 3.9 of barium oxide.
%, Aluminum oxide 19%, zinc oxide 5.5%, magnesium oxide 5.5%, and calcium oxide 4.1%. This glass powder has an average refractive index of 1.58,
Glass transition point 497 ° C., softening point 530 ° C., 50% by volume particle size (average particle size, referred to as D50) 2.2 μm, 10% by volume particle size (referred to as D10) 0.8 μm, 90% by volume particle size (D90) 6.8 μm and maximum particle size 22 μm
m. The specific surface area is 2.13 m
It is a glass powder having a tap density of 0.78 g / cc at ² / g.

Further, the same composition as described above, but with D
50 is 2.7 μm, D10 is 0.9 μm, and D90 is 7.
8 μm, maximum particle diameter 4.6 μm, specific surface area 1.93 m
² / g and a glass material (B) having a tap density of 0.85 g / cc were prepared.

The paste for forming the lower part of the partition walls includes 75% glass powder (A) and titanium oxide (manufactured by Ishihara Sangyo Co., Ltd.):
(TR-50, average particle size 1.6 μm) A glass fine powder composed of 25% was used. As the paste for forming the upper part of the partition walls, glass fine powder containing 90% of the glass material (B) and 10% of nickel oxide and cobalt oxide (1: 3 by weight) used as black pigment in total was used. .

The above glass powder mixture was dispersed in a 4% concentration polymer solution in which ethyl cellulose was dissolved in terpineol to prepare glass pastes for forming lower and upper partitions.

Stripe shape, pitch 230 μm, line width 6
Producing a screen printing plate having a pattern of 0 μm,
The coating and drying were repeated using this, firstly, a glass paste for forming the lower part of the partition was laminated to a dry thickness of 120 μm, and then a paste for forming the upper part of the partition was dried to a thickness of 30 μm.
m. 570 ° C in air
For 30 minutes to obtain a partition wall having a thickness of 110 μm.

The lower part of this partition is white, but the upper layer is black, and the stimulus value Y in the XYZ color system is 1
It was one. The chromaticity coordinates x and y calculated from the values of X, Y and Z were 0.31 and 0.32, respectively. Reflection O
The D value was 1.4.

Further, the line width of the obtained partition was 35 μm, and the irregularity in the longitudinal direction of the top of the partition was measured with a stylus type surface roughness meter (Kosaka Institute SE3300) in a measuring range of 3 mm and 9 points. The average was calculated to be 3.5 μm.

Next, a phosphor was applied between adjacent partition walls. (Y, Gd) BO ₃ : Eu for red and Z for green
n ₂ SiO ₄ : Mn, blue (Ba, Eu) MgAl
Using a phosphor of _{10 17,} a phosphor paste was prepared using these phosphor powders as a binder resin with ethyl cellulose as a solvent and terpineol as a solvent. The application of the phosphor is 25
It was formed by a dispenser method in which a phosphor paste was discharged from the tip of a nozzle having six holes (diameter: 130 μm). The phosphor has a thickness of 25 μm after firing on the side wall of the partition,
After firing, the film was applied to a thickness of 25 μm on the dielectric, and then fired at 500 ° C. for 10 minutes.

Further, the produced front substrate and rear substrate were sealed with a sealing glass, and a Ne gas containing 5% of Xe was sealed so as to have an internal gas pressure of 66500 Pa. Further, a driving circuit was mounted to produce a PDP.

The brightness at the time of full lighting was measured using a photometer MCP-200 manufactured by Otsuka Electronics Co., Ltd. Brightness is 400 cd /
m ² . In addition, Otsuka Electronics Co., Ltd. photometer MCPD-
The contrast ratio measured at 200 was 280: 1.

(Example 2) Glass material (A) of Example 1
As a glass material (C) having a lower softening point than that of, a glass powder having the following composition was used as a component of the paste for forming the partition wall upper part. That is, 8.6% of lithium oxide, 20.1% of silicon oxide, 31% of boron oxide, and 3.
8%, aluminum oxide 20.6%, zinc oxide 2.1
%, Magnesium oxide 5.9%, calcium oxide 4.2
% Glass powder.

This glass material has an average refractive index of 1.57,
It has a glass transition point of 472 ° C. and a softening point of 515 ° C. The glass powder has a D50 of 2.0 μm,
10 is 1.0 μm, D90 is 5.0 μm, maximum particle size 1
0 μm, specific surface area 1.9 m ² / g, tap density 0.80
g / cc.

As the glass powder mixture forming the lower part of the partition wall, a glass material (A) composed of 80% and a high melting point glass having the following composition of 20% was used.

The high-melting glass has a composition in terms of oxide of 38.2% of silicon oxide, 9.2% of boron oxide, 5.1% of barium oxide, 34.5% of aluminum oxide, 4.8% of magnesium oxide, The composition is 4.4% calcium oxide and 2.1% titanium oxide. The glass transition point of this high melting point glass is 652 ° C., the softening point is 746 ° C., and the average refractive index is 1.5.
8, D50 is 2.1 μm, D10 is 1.0 μm, D90
Is 3.4 μm, the maximum particle diameter is 7.8 μm, and the specific surface area is 3.3.
It was a spherical powder having a tap density of 1.1 g / cc and a powder density of ² m ² / g.

As a glass powder mixture for forming the upper part of the partition wall, 90% of the glass material (C)
%, Cobalt oxide 3% and chromium oxide 3%
A mixed fine powder was used.

In this embodiment, since the partition wall pattern is formed by the photosensitive paste method, the glass powder mixture 70 is used.
Weight part, 15 parts by weight of a photosensitive polymer (X-4007) and 15 parts by weight of a photosensitive monomer (MGP400), and 7.2 parts by weight of a photopolymerization initiator (IC-369);
0.5 parts by weight of a polymerization inhibitor (HQME), 0.5 parts by weight of a dispersant (Nopcospars 092, manufactured by San Nopco) and 1.7 parts by weight of an ultraviolet absorber were added. As an ultraviolet absorber, 1.2 parts by weight of 1,2,3-benzotriazole and Uvinul3039 (manufactured by BASF Japan)
0.5 parts by weight was used. Also, γ-butyrolactone was used as an organic solvent for adjusting the viscosity of the paste.

The glass material (A) thus prepared
Was uniformly applied by a screen printing method to obtain a coating film having a dry thickness of 160 μm. Coating and drying were repeated several times to avoid pinholes and the like in the coating film. The drying was performed at 80 ° C. for 10 minutes, and after reaching a predetermined coating thickness, drying was performed at 80 ° C. for 90 minutes. Then, a photosensitive paste containing the glass material (C) for forming the upper part of the partition wall was laminated with a coating film having a dry thickness of 30 μm.

A single proximity exposure (interval between the coating film surface and the photomask of 100 μm) is performed on the laminated coating film via a photomask (striped pattern, pitch 130 μm, line width 20 μm). Was.
The exposure amount was 9 with an ultra-high pressure mercury lamp having an output of 15 mW / cm ^2.
It was 00 mJ / cm ² . Then, a 0.3% aqueous solution of monoethanolamine kept at 35 ° C. was showered for 1 hour.
Developing by applying for 80 seconds, washing with water, and forming a partition pattern on the glass substrate. Then 575 ° C in air
For 15 minutes to form a partition having a height of 100 μm, a pitch of 130 μm, and a line width of 25 μm. When measured in the longitudinal direction at the top of the obtained partition wall, the maximum value was 2.5 μm.

Further, the stimulus value Y of the obtained partition in the XYZ color system was 5, and the chromaticity coordinates x and y were 0.32 and 0.34, respectively. The reflection OD value was 1.5.

In the obtained plasma display panel constituted by using a substrate having a partition having a white lower part and a black upper part, crosstalk due to malfunction was not observed, and a display with good contrast was obtained. . The luminance of the panel was 400 cd / m ² . The contrast ratio measured with Otsuka Electronics photometer MCPD-200 is 20.
0: 1.

Example 3 The photosensitive glass paste containing the glass material (A) used in Example 2 was used for forming the lower part of the partition, and the paste for forming the upper part of the partition had a small D50 and a softening point. Example 2 was repeated using a lower glass material (D) than the glass material (A).

The glass material (D) has the same composition as the glass material (C) except that D50 is 1.6 μm, D10 is 0.7 μm, D90 is 3.5 μm, and the maximum particle diameter is 9.3.
μm, the specific surface area is 3.44 m ² / g, and the tap density is 0.4 μm.
It is 76 g / cc.

After forming a partition pattern in the same manner as in Example 2, the partition top obtained by baking has high smoothness.
The unevenness in the longitudinal direction was 1.9 μm on average. The stimulus value Y of the partition in the XYZ color system was 13, and the chromaticity coordinates x and y were 0.32 and 0.33, respectively.
The reflection OD value was 1.4. Further, a plasma display panel was manufactured under the same conditions as in Example 1. The brightness of the panel is 400 cd / m ² and the contrast ratio is 25.
0: 1.

Example 4 In Example 2, cordierite (average particle diameter 2.3 μm, refractive index 1.56) was used as a filler component instead of high melting point glass.

The unevenness in the longitudinal direction of the top of the partition wall is the same as in Example 2, the stimulus value Y of the partition wall in the XYZ color system is 15, the chromaticity coordinates x and y are 0.33, respectively.
0.34. The reflection OD value was 1.3. A plasma display panel was manufactured under the same conditions as in Example 1. The luminance of the panel was 360 cd / m ² and the contrast ratio was 250: 1.

Example 5 70% of glass material (B) as fine glass particles, 20% of alumina (average particle size 2.5 μm, refractive index 1.77) as a filler component, and 4% of iron sesquioxide as a black pigment , Cobalt oxide and 3% chromium oxide.

A photosensitive paste having the same composition as that shown in Example 2 was prepared using the glass fine particles, and a coating film having a dry thickness of 130 μm was obtained in the same manner. Further, exposure, development, and baking were performed by the method described in Example 2 to form a partition having a height of 100 μm and a line width of 25 μm, which was entirely black. The unevenness in the longitudinal direction at the top of the partition wall was 4.5 μm at the maximum. XY of the partition
The stimulus value Y in the Z color system is 15, and the chromaticity coordinates x,
y was 0.35 and 0.36, respectively. The reflection OD value was 1.4. A plasma display panel was manufactured under the same conditions as in Example 1. Brightness is 410 cd / m
^{At 2} , the contrast ratio was 280: 1.

(Example 6) At the time of mixing and producing a glass material, the composition of the glass material (A) was made to contain nickel oxide and cobalt oxide at a weight ratio of 1: 4 in terms of oxide and a content of 7% in the glass material. I tried to be. That is, a glass material was prepared by uniformly melting and mixing a black pigment component. The average particle size and the maximum particle size of this glass material were controlled at the same level as that of the glass material (B). This glass material 85
% And cordierite 15% as a filler component were mixed to obtain glass fine particles.

Using the glass fine particles, a photosensitive glass paste was prepared in the same composition as in Example 2, and a partition wall pattern was produced in the same manner as in Example 5. The partition walls were entirely blackened, and the stimulus value Y in the XYZ color system was 16. The average value of the irregularities in the longitudinal direction at the top of the partition wall is 3.8 μ.
m. The reflection OD value was 1.3. further,
A plasma display panel was manufactured under the same conditions as in Example 1. The luminance was 400 cd / m ² and the contrast ratio was 250: 1.

Example 7 Example 2 was repeated, except that the glass material obtained by melting and mixing the black pigment component used in Example 6 was mixed with the photosensitive paste for forming partition upper portions in Example 2. A partition having a black upper portion and a white lower portion was obtained. The stimulus value Y of the partition in the XYZ color system was 4.0.
The average value of the unevenness in the longitudinal direction at the top of the partition wall was 4.1 μm. The reflection OD value was 1.6. A plasma display panel was manufactured under the same conditions as in Example 1. The brightness is
At 370 cd / m ² , the contrast ratio was 400: 1.

(Example 8) At the time of preparing and blending the glass material, the composition of the glass material (A) was adjusted so that the ruthenium oxide content was 6%. Next, a glass material was prepared by uniformly melting and mixing the black pigment component. This glass material was blended with the photosensitive paste for forming the upper partition walls in Example 2, and Example 2 was repeated. A partition having a black upper portion and a white lower portion was obtained. The stimulus value Y of the partition in the XYZ color system was 5.0. The average value of the unevenness in the longitudinal direction at the top of the partition wall was 3.5 μm. The reflection OD value is
1.5. A plasma display panel was manufactured under the same conditions as in Example 1. Brightness is 400 cd / m
^{In 2} , the contrast ratio was 350: 1.

(Example 9) At the time of blending and manufacturing of glass material, the composition of glass material (A) was changed to manganese oxide and cobalt oxide in a weight ratio of 2: 2 in terms of oxide and the content in the glass material was 7%. It was blended so that That is, a glass material was prepared by uniformly melting and mixing a black pigment component. The average particle size and the maximum particle size of this glass material were controlled at the same level as that of the glass material (B). Example 2 was repeated by blending the glass material with the photosensitive paste for forming the upper partition walls in Example 2. A partition having a black upper portion and a white lower portion was obtained. Stimulus value Y of partition wall in XYZ color system
Was 3.5. The average value of the irregularities in the longitudinal direction at the top of the partition wall was 4.3 μm. The reflection OD value was 1.6. A plasma display panel was manufactured under the same conditions as in Example 1. The brightness was 380 cd / m ² and the contrast ratio was 250: 1.

The meanings of the abbreviations used in the above embodiments are as follows. X-4007: a copolymer consisting of 40% methacrylic acid, 30% methyl methacrylate, and 30% styrene was subjected to an addition reaction of 0.4 equivalent of glycidyl methacrylate, and a weight average molecular weight of 4
3,000, a photosensitive polymer having an acid value of 95. _{MGP400: X 2 H-CH (} CH 3) -CH 2 - (OCH 2 CH (CH 3)) n-NX 2 _{wherein, X = -CH 2 CH (OH} ) -CH 2 O-CO-C (CH ₃ ) = CH ₂ , n = 2-10 IC-369: Irgacure 369 (manufactured by Ciba-Geigy)
-Benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone-1 HQME: hydroquinone monomethyl ether

[0134]

According to the present invention, the stimulus value Y of the partition in the XYZ color system is 20 or less, and the unevenness in the longitudinal direction at the top of the partition is controlled to 0.5 to 10 μm, whereby the display contrast is improved. It is possible to obtain a plasma display which is stable and has stable display without malfunction such as crosstalk in a discharge space.

Claims (20)

[Claims] 1. A plasma display having a partition on a substrate, wherein the partition has a stimulus value Y of 20 or less in an XYZ color system, and the partition has an irregularity of 0.
A member for a plasma display, which has a thickness of 5 to 10 μm. 2. A plasma display having a partition on a substrate, wherein the partition comprises at least two layers, and a stimulus value Y in an XYZ color system of the upper part of the partition is 20 or less,
A member for a plasma display, wherein the lower part of the partition is white or transparent. 3. The member for a plasma display according to claim 1, wherein a reflection OD value of the partition wall is 1.3 or more. 4. The member for a plasma display according to claim 1, wherein the partition has a stripe shape. 5. The member for a plasma display according to claim 1, wherein the line width at the top of the partition wall is 5 to 80 μm. 6. The plasma display member according to claim 1, wherein the partition walls have a pitch of 100 to 250 μm and a height of 50 to 170 μm. 7. The method according to claim 1, wherein the thickness of the black portion at the upper part of the partition in the height direction is 5 to 50 μm, and the thickness of the white or transparent part of the lower part of the partition in the height direction is 20 to 150 μm. 3. The member for a plasma display according to 2. 8. The member for a plasma display according to claim 1, wherein the chromaticity coordinate values x and y of the partition walls are respectively 0.3 to 0.36. 9. The chromaticity coordinate values x and y of the upper part of the partition wall are respectively 0.3 to 0.36.
The member for a plasma display according to the above. 10. The partition wall has a glass transition point of 450 to 550.
The member for a plasma display according to any one of claims 1 to 9, wherein the member is made of a glass material having a softening point of 500 to 600 ° C. 11. The partition according to claim 1, wherein the partition is made of a glass material having the following composition in terms of oxide.
0. The member for a plasma display according to any one of the above. Lithium oxide: 3 to 15% by weight Silicon oxide: 10 to 30% by weight Boron oxide: 20 to 40% by weight Barium oxide: 2 to 15% by weight Aluminum oxide: 10 to 25% by weight 12. The partition wall has a glass transition point of 450 to 550.
Glass material having a softening point of 500 to 600 ° C.
The member for a plasma display according to any one of claims 1 to 11, comprising 0% by weight and 10 to 50% by weight of a filler. 13. The filler, titanium oxide, alumina,
The member for a plasma display according to claim 12, wherein the member is at least one selected from the group consisting of barium titanate, zirconia, cordierite, mullite, and a high melting point glass material. 14. The member for a plasma display according to claim 13, wherein the high melting point glass material has the following composition in terms of oxide. Silicon oxide: 15 to 50% by weight Boron oxide: 5 to 20% by weight Aluminum oxide: 15 to 50% by weight Barium oxide: 2 to 10% by weight 15. The partition is made of Ru, Mn, Ni, Cr, F.
The member for a plasma display according to any one of claims 1 to 14, wherein a metal of e, Ti, Co, Cu, Pb, or Bi or an oxide thereof is contained in a total amount of 3 to 20% by weight. 16. The method according to claim 1, wherein the softening point of the glass powder contained in the upper part of the partition is lower than that of the glass powder contained in the lower part of the partition by 10 to 50 ° C. Member for plasma display. 17. A method for manufacturing a member for a plasma display in which a partition is formed on a substrate using a glass paste comprising glass fine particles and an organic component, wherein the glass paste is made of Ru, Mn, Ni, Cr, Fe, Ti. , Cu, P
A method for producing a member for a plasma display, comprising a total of 3 to 20% by weight of a metal of b, Bi, Co or an oxide thereof. 18. A method for producing a member for a plasma display, wherein a partition is formed on a substrate using a glass paste comprising glass fine particles and an organic component, wherein the paste comprises at least two layers and forms an upper part of the partition. inside,
Ru, Mn, Ni, Cr, Fe, Ti, Cu, Pb, B
i, Co metal or their oxides in a total of 3 to 2
A method for producing a member for a plasma display, comprising 0% by weight. 19. The softening point of the glass powder contained in the paste forming the upper part of the partition wall is lower by 10 to 50 ° C. than the softening point of the glass powder contained in the paste forming the lower part of the partition wall. The manufacturing method of the member for plasma displays of the description. 20. A plasma display using the plasma display member according to claim 1. Description: