JP2002367523A - Plasma display panel and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve higher definition through a further reduction in row pitch by preventing a decrease in the accuracy of positioning barrier ribs on a back substrate and positioning marks. SOLUTION: The barrier ribs 4 and the positioning marks 5 are formed at the same time so as to reduce errors in the dimensional accuracies of the barrier ribs 4 and the positioning marks 5. The positioning marks 5 formed at the same time as the barrier ribs 4 on the back base 1 enable a reduction in the distance between the positioning mark 5 and another positioning mark 7 on a front base 2, that is, a distance in thickness direction of the PDP(plasma display panel), and the need for adjusting the focus of a positioning mark microscope to the positioning mark 7 on the front substrate 2 and to the positioning mark 5 on the back substrate 1, as would be required with a positioning device for the front substrate 2 on the back substrate 1, is eliminated whereby the accuracy of positioning can be enhanced. Also, the positioning device for the front substrate 2 and the back substrate 1 can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color display device which is thin and capable of realizing a large screen, and comprises a surface discharge type plasma display panel (hereinafter referred to as "PDP") and a PDP.
And a method for producing the same.

[0002]

2. Description of the Related Art As a color display device, a three-electrode surface discharge type AC PDP has been put to practical use. The term “surface discharge type” as used herein refers to A which maintains a lighting state using wall charges.
In this type, the first and second main electrodes, which alternately serve as an anode or a cathode in the C drive, are arranged in parallel to one inner surface of the substrate pair. In a surface discharge type PDP, the main electrode extends in the same direction as a row electrode that defines a row of a screen, so that a third electrode (column electrode) for selecting an individual cell in each row and a discharge space are arranged in columns. A partition (barrier rib) for partitioning each time is required. With respect to the arrangement of the partition walls, a form in which a partition wall having a height corresponding to the gap size of the discharge space is provided on one substrate is mainly used.

The basic form of the three-electrode structure is to arrange a pair of main electrodes for each row of the screen. The arrangement interval (surface discharge gap) of the main electrode pairs in each row is 150 to 200.
The thickness is selected from several tens to several hundreds of micrometers so that a discharge is generated by applying a voltage of about volt. On the other hand, the electrode spacing (reverse slit) between adjacent rows has a value (about several times) sufficiently larger than the surface discharge gap in order to prevent unnecessary surface discharge between rows and reduce capacitance. is necessary.

In such a basic form, it is difficult to achieve high definition by reducing the row pitch. Therefore, Japanese Patent Laid-Open No. 2000-22
A plurality of protrusions extending in the row direction from the base at the arrangement position of the main electrode in the column direction are provided on a partition wall that partitions the discharge space for each column as described in JP-A-3034. Means for preventing erroneous discharge between adjacent discharge spaces by devising a structure in which the column space, which is the discharge space of the above, is periodically narrowed has been devised.

[0005]

However, in the above-described configuration in which the partition walls are provided with a plurality of projections projecting from the base in the row direction at the positions of the main electrodes in the column direction, the row is maintained while maintaining the luminance. In order to realize high definition by reducing the pitch, high-precision positioning in the column direction between the main electrode and the protrusion of the partition is required. In other words, high-precision positioning between the front-side substrate on which the main electrode is disposed and the rear-side substrate on which the partition wall is disposed and subsequent fixing of the substrate by sealing are essential.

Generally, the positioning mark on the front substrate on which the main electrode is arranged is formed simultaneously with the main electrode by a photolithography method (photosensitive paste printing on the substrate → exposure → development → baking). The dimensional accuracy between the positioning mark and the main electrode can be suppressed to an error of about the manufacturing accuracy of the photomask (± 3 to 5 μm).

The positioning marks on the rear substrate on which the partition walls are arranged are formed by photolithography.
Are formed at the same time as the electrodes (column electrodes), but the barrier ribs on the back side substrate are formed in the next step by the sandblast method (rib material die coating on the substrate → photoresist printing → exposure → development → sandblast → separation → firing). (See FIG. 4).
For this reason, the positional accuracy between the positioning mark and the partition wall is particularly increased due to the accuracy of the exposure mask itself, its positioning reproducibility and the firing process (maximum temperature of about 600 ° C.). ± 20-30μ
m. Then, even if the positioning marks on the front substrate and the positioning marks on the rear substrate are positioned with high accuracy, there is a problem that a displacement in the column direction occurs between the main electrode and the protrusion of the partition wall.

The present invention is directed to solving the above-mentioned problems of the prior art, and prevents a deterioration in the positional accuracy between the partition wall and the positioning marks on the rear substrate, and achieves a higher definition by further reducing the line pitch. It is an object of the present invention to provide a PDP and a method of manufacturing the PDP that realize the above.

[0009]

In order to achieve the above object, a plasma display panel according to the present invention and a method for manufacturing the same are characterized in that a plurality of main electrodes defining screen rows are adjacent main electrodes. A plasma display in which a discharge space in a screen is divided for each column by a surface-side substrate arranged and formed so as to be able to generate a surface discharge with each other as an electrode pair, and a plurality of partition walls spaced apart from each other in a row direction. The rear substrate on which the partition walls of the panel are disposed, and the positioning mark formed simultaneously with the partition walls on the rear substrate used for adjusting the bonding position of the front substrate on which the main electrode is disposed. Features.

In addition, a plurality of main electrodes defining rows of a screen are spaced apart from a front-side substrate formed and arranged so that surface discharge can be generated using adjacent main electrodes as an electrode pair. The discharge space in the screen is divided for each column by a plurality of partition lines arranged in the direction, and at least one of a pair of partition walls corresponding to each column of the screen has a base in a plan view band shape extending over the entire length of the screen and a main electrode in the column direction. A partition wall of a plasma display panel having a structure including a plurality of protrusions projecting in the row direction from the base at the disposition position and having a structure in which a column space as a discharge space for one column is periodically narrowed by the protrusions is disposed. And a positioning mark formed at the same time as the partition wall on the rear substrate used for adjusting the bonding position of the front substrate on which the main electrode is arranged. And wherein the door.

Further, the present invention is characterized in that the projection of the partition is extended and used as a positioning mark for adjusting the bonding position between the front substrate and the rear substrate.

In the method of manufacturing a plasma display panel according to the present invention, a plurality of main electrodes defining a row of a screen are arranged so that surface discharge can be generated by using adjacent main electrodes as an electrode pair. And a rear side substrate on which a partition wall of a plasma display panel in which a discharge space in a screen is partitioned for each column by a plurality of partition walls arranged in a row direction apart from each other, and a front side substrate on which a main electrode is disposed. The positioning mark used for adjusting the bonding position is formed simultaneously with the partition.

Further, in the rear substrate, the protrusion of the partition used for adjusting the bonding position with the front substrate is formed simultaneously with the partition as an extended positioning mark.

According to the plasma display panel having the above-described structure and the method of manufacturing the same, the positioning mark for adjusting the bonding position with the front substrate is formed simultaneously with the partition on the rear substrate on which the partition is arranged. And the dimensional accuracy between the partition wall and the high definition, and the distance in the thickness direction of the PDP between the positioning mark of the front side substrate and the positioning mark formed by the partition wall,
Positioning marks The positioning accuracy of each of the positioning marks on the front substrate and the rear substrate by the microscope can be improved, and the projection marks on the partition walls are extended to provide positioning marks, so that the rear substrate and the front substrate can be aligned. And the accuracy of the alignment can be improved.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram showing a flow of a manufacturing process for forming partition walls and positioning marks on a rear substrate of a PDP according to an embodiment of the present invention. As shown in FIG. 1, the third electrodes (column electrodes) are formed on a glass substrate by photolithography (photosensitive paste printing → exposure → development → baking). Next, the partition wall and the positioning mark are simultaneously subjected to the sandblasting method (rib material die coating → photoresist printing → exposure → development → sandblasting → peeling →
(Firing).

As described above, by forming the positioning mark simultaneously with the partition, the dimensional accuracy between the partition and the positioning mark can be suppressed to an error of about ± 10 μm. If the partition and the positioning mark are simultaneously manufactured by photolithography (photosensitive paste printing → exposure → development → baking), the dimensional accuracy between the partition and the positioning mark is about the same as the photomask manufacturing accuracy (± 3 to 5 μm). Error can be suppressed.

FIG. 2A is a plan view showing a positioning mark of a PDP having a positioning mark formed simultaneously with a partition, FIG. 2B is a partial plan view, and FIG. 2C is a partial sectional view. It is. 2, reference numeral 1 denotes a rear substrate, 2 denotes a front substrate, 3 denotes a third electrode (column electrode) formed on the rear substrate 1, 4 denotes a partition formed on the rear substrate 1, and 5 denotes a rear surface. A positioning mark formed simultaneously with the partition 4 on the side substrate 1, a main electrode 6 composed of first and second electrodes formed on the front substrate 2, and a main electrode 6 on the front substrate 2 simultaneously with the main electrode 6. It is a positioning mark to be formed.

As shown in FIG. 2, by forming the partition walls 4 and the positioning marks 5 at the same time, errors in the dimensional accuracy of the partition walls 4 and the positioning marks 5 are reduced. Further, a positioning mark 5 formed at the same time as the partition wall 4 of the rear substrate 1 is formed.
As a result, the distance between the positioning mark 5 and the positioning mark 7 of the front substrate 2 in the thickness direction of the PDP can be reduced (see FIG. 2C). In the positioning apparatus of (1), the focus adjustment of each of the positioning mark 7 of the front substrate 2 and the positioning mark 5 of the rear substrate 1 of the positioning mark microscope becomes unnecessary, and the positioning accuracy can be improved.
The alignment device for the front substrate 2 and the rear substrate 1 can be simplified.

FIG. 3A is a plan view showing another example of a positioning mark of a PDP having a positioning mark formed by extending a protrusion of a partition wall according to the present embodiment.
(B) is a partial plan view. Here, components having substantially the same functions as those described with reference to FIG. 2 are denoted by the same reference numerals.

In FIG. 3, reference numeral 10 denotes a protrusion 4a of the partition wall 4 of the rear substrate 1 as a positioning mark used for positioning the main electrode 6 with respect to the front substrate 2.
Is a positioning mark formed by elongating. This partition 4
By forming the positioning marks 10 by extending the projections 4a, it is possible to more accurately cope with the modification of the exposure mask for forming the partition walls 4, and to use a film forming apparatus having a small area. Cost can be reduced.

The extended shape of the partition wall may be any shape as long as it is suitable for the positioning mark, and the extended portion may be any place suitable for the positioning device. Further, in general, a plurality of positioning marks are arranged, and the more distant between the positioning marks, the more accurate the positioning becomes possible.

[0023]

As described above, according to the present invention,
A positioning mark used for adjusting the bonding position between the rear substrate and the front substrate is formed simultaneously with the partition on the rear substrate, and the dimensional accuracy between the positioning mark and the partition is improved, and the partition of the rear substrate is formed. The distance in the thickness direction of the PDP between the positioning mark on the front side substrate and the positioning mark on the front side substrate is shortened by the positioning mark formed in step 2, and it is not necessary to adjust the focus of each of the positioning marks on the front side substrate and the rear side substrate using a positioning mark microscope As a result, the positioning accuracy can be improved and the positioning device can be simplified.

Further, the projections of the partition walls on the rear substrate are extended to provide positioning marks used for positioning the front substrate and the rear substrate, thereby enabling the alignment between the rear substrate and the front substrate. In addition to improving the accuracy, it is possible to more accurately cope with the modification of the exposure mask for forming the partition wall, and it is possible to reduce the cost by using a small-area film forming apparatus.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flow of a manufacturing process for forming a partition wall and a positioning mark on a rear substrate of a PDP according to an embodiment of the present invention.

2A is a plan view showing a positioning mark of a PDP provided with a positioning mark formed simultaneously with a partition in the present embodiment, FIG. 2B is a partial plan view, and FIG.

FIG. 3A is a plan view showing a positioning mark of a PDP provided with a positioning mark formed by extending a protrusion of a partition wall, which is another example of the present embodiment, and FIG. Figure

FIG. 4 is a diagram showing a flow of a manufacturing process for forming a partition wall and a positioning mark on a back side substrate of a conventional PDP.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 back substrate 2 front substrate 3 third electrode 4 partition 4 a projection 5, 7, 10 positioning mark 6 main electrode

Continuation of the front page F term (reference) 5C012 AA09 BB07 5C040 FA01 GB03 GB14 JA40 MA02 MA24 5C058 AB01 BA25 BA35 5G435 AA17 BB06 HH14 HH18 KK03 KK05

Claims (5)

[Claims] 1. A front-side substrate in which a plurality of main electrodes defining a row of a screen are arranged and formed so that surface discharge can be generated using adjacent main electrodes as an electrode pair.
A rear substrate on which the partitions of the plasma display panel in which the discharge space in the screen is partitioned for each column by a plurality of partitions separated from each other in a row direction, and a front substrate on which the main electrodes are disposed. A plasma display panel, comprising: a positioning mark used for adjusting a bonding position and formed on the rear substrate at the same time as the partition wall. 2. A front-side substrate in which a plurality of main electrodes defining rows of a screen are arranged and formed so that surface discharge can be generated using adjacent main electrodes as an electrode pair.
The discharge space in the screen is partitioned for each column by a plurality of partition walls arranged in a row direction apart from each other, and at least one of a pair of partition walls corresponding to each column of the screen has a base and a column in a plan view band extending over the entire length of the screen. A plasma display having a structure in which a plurality of protrusions projecting in the row direction from the base at the arrangement position of the main electrode in a direction and a column space as a discharge space for one column is periodically narrowed by the protrusions. A rear substrate on which the partition walls of the panel are arranged,
A plasma display panel comprising: a positioning mark used for adjusting a bonding position with a front substrate on which the main electrode is arranged; and a positioning mark formed simultaneously with the partition on the rear substrate. 3. The plasma display panel according to claim 2, wherein the projection of the partition wall is extended to serve as a positioning mark used for adjusting a bonding position between the front substrate and the rear substrate. 4. A plurality of main electrodes defining a row of a screen are arranged so that surface discharge can be generated by using adjacent main electrodes as an electrode pair, and a plurality of partition walls arranged apart from each other in a row direction. A positioning mark used for adjusting a bonding position with a front substrate on which the main electrode is disposed on a rear substrate on which the partition walls of a plasma display panel in which a discharge space in a screen is partitioned for each column by the Is formed simultaneously with the partition walls. 5. The back side substrate, wherein a projection of a partition used for adjusting a bonding position with the front substrate is formed simultaneously with the partition as an extended positioning mark. Of manufacturing a plasma display panel.