JP2000353468A - Forming die for plasma display panel back plate and forming method of back plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate enlargement of a screen by obtaining barrier ribs high in dimensional accuracy and uniform in height, by alternately layering plates of the same thickness as the barrier ribs and plates of the same thickness as the width of cells and causing the plates of the same thickness as the width of the cells to project by the height of the barrier ribs to form groove parts in stripes. SOLUTION: Metallic plates A of the same thickness as barrier ribs and metallic plates B of the same thickness as the width of cells are machined into linear shapes, and the metallic plates A and the metallic plates B are alternately placed one on another. This is fixed so that no gaps are produced and that linearly machined edges of the metallic plates B uniformly project, thus forming a stripe forming die. Groove parts in the stripe forming die so obtained are filled with a paste-like barrier-rib forming material comprising a low melting-point glass powder, a butyral resin, a solvent, a dispersant, etc., and this is bonded under pressure to a glass substrate fitted with electrodes. Then, the stripe forming die is peeled off. The glass substrate with a barrier-rib molding thus formed thereon is retained at a fixed temperature to remove a binder and baked, thus forming desired barrier ribs of good shapes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the formation of a back plate of a plasma display panel.

[0002]

2. Description of the Related Art A plasma display panel used for a thin large-screen color display device or the like is provided with opposing electrodes in a space surrounded by partition walls called minute display cells, and discharges rare gas or the like into the space. It has a structure in which a possible gas is sealed, generates plasma by discharge between opposing electrodes, and emits a phosphor by the plasma to be used as a light emitting element of a screen.

In a specific structure, a large number of barriers are formed on one surface of a back plate, and a cell is provided between the barriers. A back plate is provided with electrodes on the bottom surface of the cell. A phosphor is applied to the inner wall surface of the cell with respect to the back plate, and a front plate provided with electrodes is joined to a partition of the back plate, and a gas is sealed in the cell to form a plasma display device. I do. Note that the electrodes are arranged so as to be orthogonal.

In general, as a method of manufacturing a barrier on a back plate of a plasma display panel, a paste made of a composition for forming a barrier is repeatedly printed and dried on a back plate by a screen printing method to laminate a barrier pattern to a predetermined height. After the barrier shape is formed, a method of baking and solidifying is known.However, this method has a large number of repeated steps, and the barrier bottom is disturbed due to sagging and the mesh of the screen printing plate, and printing is performed. Due to misalignment at the time and deformation due to elongation of the screen printing plate itself, good dimensional accuracy cannot be obtained, and it is difficult to cope with high definition.

As another barrier forming method instead of the screen printing method, a barrier forming material is formed in a required thickness on a back plate, and unnecessary portions are ground and removed by sandblasting using a mask pattern. There is known a method of forming a barrier shape by using such a method. However, this method has a problem in that a barrier material other than a barrier forming portion is deleted, thereby increasing a manufacturing cost, and also in order to cope with higher definition. However, when trying to form a narrow barrier at a fine pitch, the higher the barrier, the more the unnecessary part is ground by sandblasting, and the side of the barrier is also ground, so the barrier is damaged during processing. Or it may cause barrier breakage during firing, making it difficult to respond to high definition.

Therefore, as shown in Japanese Patent Application Laid-Open No. 9-134676, a molding material obtained by filling a molding material having a mixture of ceramics or glass powder and a binder into a molding die having an inverted pattern of the dividing walls. A method has been proposed in which a partition is formed by joining and integrating a body and a back plate.

Further, as disclosed in JP-A-10-302614, a partition wall forming material comprising a mixture of ceramics or glass powder and a binder is applied to a back plate, and is applied on the surface of a roll provided with a plurality of grooves. There has also been proposed a method in which a partition is formed in a circumferential groove of a roll by rotating a surface while applying pressure to plastically deform a partition forming material.

In these methods, it is possible to form a partition having good shape and dimensional accuracy, and it is possible to reduce the production cost without wasting the material for forming the partition.

[0009]

In these methods, since the shape of the partition is determined by the mold having the stripe-shaped grooves in which the shape of the partition is inverted, the required width of the partition is reduced and the height is reduced. As the height gets higher, narrow and deep grooves must be machined in stripes when making molds, but when making molds by cutting, it is necessary to use a tool with a fine tip shape When cutting deep grooves, tool breakage is likely to occur, and if the required partition wall width and pitch are changed, it is necessary to re-create from the tool to be used. Tools are difficult and expensive to make.

Further, when a photosensitive material such as a dry film is used for forming a mold, it is extremely difficult to produce a fine pattern having a high aspect ratio due to poor exposure or poor development. Had the drawback that it could not cope.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a partition wall having no distortion or deformation and having good dimensional accuracy and uniform height is provided on a back plate for plasma display at a low cost. It is an object of the present invention to provide a method of manufacturing a rear panel for a plasma display, which can easily realize a large screen and can realize high definition with a display cell pitch of 0.2 mm or less. I do.

[0012]

According to the present invention, two types of plates, a plate A having the same thickness as the partition walls and a plate B having the same thickness as the cell width, are alternately laminated. and,
Provided is a mold for a back plate of a plasma display panel having a stripe-shaped groove formed by projecting a plate B more uniformly than a plate A by a height of a partition wall.

Further, in the present invention, the mold of claim 1 is filled with a mixture of a ceramic powder or a glass powder and a binder, and is brought into contact with a substrate made of ceramic or glass to form a partition on the substrate. A method for forming a back plate of a plasma display panel is provided.

Further, in the present invention, the molding die of claim 1 is brought into close contact with a mixture of a ceramic powder or a glass powder and a binder applied on a substrate made of ceramic or glass while applying pressure to the mixture. A method of forming a back plate of a plasma display panel, comprising forming a partition.

Further, in the present invention, two types of plates, a plate A having the same thickness as the partition and a plate B having the same thickness as the cell width, are alternately laminated, and the height of the partition is higher than that of the plate B. Provided is a mold for a back plate of a plasma display, which is obtained by inverting and duplicating a stripe-shaped groove portion formed by uniformly projecting the same by electroforming, resin, wax, or the like.

Further, the present invention is characterized in that the mold of claim 4 is filled with a mixture of ceramic powder or glass powder and a binder and is brought into contact with a substrate made of ceramic or glass to form partition walls. And a method for forming a back plate of a plasma display panel.

Further, in the present invention, two kinds of disks, a disk A having the same thickness as the partition wall and a disk B having the same thickness as the cell width and having a shorter radius than the disk A by the height of the partition wall, are used. The present invention provides a mold for a back plate of a plasma display panel having a cylindrical stripe-shaped groove formed by alternately stacking the discs A and B with their centers aligned.

Further, in the present invention, the molding die according to claim 6 is filled with a mixture of ceramic powder or glass powder and a binder, and the cylinder is brought into contact with a substrate made of ceramic or glass, and is rotated. A method of forming a back plate of a plasma display panel, wherein a partition is formed thereon is provided.

Further, in the present invention, the molding die of claim 6 is rotated while pressing the mixture of the ceramic powder or glass powder and the binder applied on the substrate made of ceramic or glass, while pressing the mixture on the substrate. A method of forming a back plate of a plasma display panel, comprising forming a partition.

Further, in the present invention, claim 1, claim 4,
The present invention provides a mold for a back plate of a plasma display panel, wherein at least two kinds of thicknesses of the plate B are used.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for forming a plasma display panel back plate according to the present invention will be described.

Example 1 A metal plate A having a thickness of 50 μm
Only 073 sheets and 3073 metal plates B having a thickness of 100 μm are prepared. At this time, for each of the metal plates A and B,
At least one side is processed into a straight line having a length of 400 mm.

Next, the metal plate A and the metal plate B are
The sides a and b processed in a straight line are directed in the same direction,
.. B, A, B, A, B...

With respect to the side a of the metal plate A which has been processed linearly, the side b which has been processed linearly of the metal plate B is uniformly 2.
The side a of the metal plate A and the side b of the metal plate B are aligned so as to protrude by 00 μm, and are fixed so that no gap is formed between the metal plates, thereby forming a striped mold. At this time, electroforming the striped mold with the laminated metal plate,
The strength may be increased by integrating the respective metal plates.

Next, A was screen-printed on a 23-inch soda-lime glass substrate having a thickness of 2.8 mm.
g was formed over the entire surface at a pitch of 150 μm using an electrode paste containing g as a main component at a pitch of 150 μm, followed by firing to produce a glass substrate with electrodes.

Next, after filling the groove of the striped mold with a paste-like partition wall forming material comprising a low melting point glass powder, a bratyl resin, a solvent and a dispersant, pressure bonding is performed on the glass substrate with electrodes. After that, only the striped mold was peeled off to form a partition wall formed body on the glass substrate.
At this time, an adhesive or an adhesive may be applied between the partition wall forming material and the glass substrate with electrodes. At this time, if the partition wall forming material is cured before the striping mold is released, the partition wall forming material can be transferred onto the glass substrate with electrodes without any chipping. As a method of curing the partition wall forming material, curing by drying of a solvent, light curing by ultraviolet rays, heat curing, and the like are considered depending on the resin component of the partition wall forming material.

Next, the glass substrate on which the partition wall forming body has been formed is debindered while maintaining the glass substrate at a predetermined temperature, and the firing atmosphere is appropriately changed according to the main components of each material. 150 μm in width, 50 μm in width,
The partition walls having a pitch of 150 μm could be formed in a good shape.

<Embodiment 2> A metal plate A having a thickness of 50 μm
Only 073 sheets and 3073 metal plates B having a thickness of 100 μm are prepared. At this time, for each of the metal plates A and B,
At least one side is processed into a straight line having a length of 400 mm.

Next, the metal plate A and the metal plate B are processed in a straight line so that the sides thereof are oriented in the same direction.
A and B are alternately superposed in this order.

With respect to the side a of the metal plate A which has been processed linearly, the side b which has been processed linearly of the metal plate B is uniformly 2.
The side a of the metal plate A and the side b of the metal plate B are aligned so as to protrude by 00 μm, and are fixed so that no gap is formed between the metal plates, thereby forming a striped mold. At this time, electroforming the striped mold with the laminated metal plate,
The strength may be increased by integrating the respective metal plates.

Next, a glass substrate with electrodes was prepared in the same manner as in Example 1, and a paste-like partition wall made of low-melting glass powder, a bratyl resin, a solvent, and a dispersant was formed on the glass substrate with electrodes by a roll coater. The forming material is uniformly applied to a thickness of 100 μm.

The stripe-shaped mold is press-compressed to the rib material layer applied on the glass substrate, the rib-forming material layer is deformed by composition, and the stripe-shaped mold is peeled off. A partition forming body was formed on the substrate. At this time, if the partition wall forming material is cured before the striping mold is released, the partition wall forming material can be transferred onto the glass substrate with electrodes without any chipping.
Depending on the resin component of the partition wall forming material, a method of curing the partition wall forming material may be, for example, curing by drying a solvent, light curing by ultraviolet rays or the like, thermal curing, or the like.

Next, the glass substrate on which the partition wall forming body has been formed is debindered at a predetermined temperature, and the firing atmosphere is appropriately changed according to the main components of each material. A partition having a thickness of 150 μm and a width of 50 μm could be formed with a good pitch at a pitch of 150 μm.

<Embodiment 3> A metal plate A having a thickness of 50 μm was
Only 073 sheets and 3073 metal plates B having a thickness of 100 μm are prepared. At this time, for each of the metal plates A and B,
At least one side is processed into a straight line having a length of 400 mm.

Next, the metal plate A and the metal plate B are
The sides a and b processed in a straight line are directed in the same direction,
.. B, A, B, A, B...

With respect to the side b of the metal plate B which has been processed linearly, the side a which has been processed linearly of the metal plate A is uniformly 2.
The side a of the metal plate A and the side b of the metal plate B are aligned so as to protrude by 00 μm, and fixed so that no gap is formed between the metal plates. Fill and cure.

After the silicone rubber has been cured, it is peeled off from the laminate of metal plates to form a striped mold. The mold at this time is not limited to silicon rubber, and may be a metal mold by electroforming, a mold by wax, or the like.

Next, a glass substrate with electrodes was prepared in the same manner as in Example 1, and a paste-like partition wall forming material comprising a low-melting glass powder, a bratyl resin, a solvent, and a dispersant was placed in the recesses of the striped mold. Was filled and pressed on a glass substrate with electrodes, and then only the striped mold was peeled off to form a partition wall formed body on the glass substrate. At this time, an adhesive or an adhesive may be applied between the partition wall forming material and the glass substrate with electrodes. At this time, if the partition wall forming material is cured before the striping mold is released, the partition wall forming material can be transferred onto the glass substrate with electrodes without any chipping. Depending on the resin component of the partition wall forming material, a method of curing the partition wall forming material may be, for example, curing by drying a solvent, light curing by ultraviolet rays or the like, thermal curing, or the like.

Next, the glass substrate on which the partition wall-formed body was formed was debindered while being kept at a predetermined temperature, and the firing atmosphere was appropriately changed according to the main components of each material. A partition having a thickness of 150 μm and a width of 50 μm could be formed with a good pitch at a pitch of 150 μm.

Embodiment 4 Only 3072 metal disks A having a thickness of 50 μm and 3073 metal disks B having a thickness of 100 μm are prepared. At this time, holes having the same diameter were made in the center of each of the metal disks A and B, and the radius of the metal disk B was larger than that of the metal disk A by 200 μm.

Next, the metal plate A and the metal plate B are passed through a round bar having the same diameter as the hole at the center of the disk, and B, A, B,
A, B... Were alternately superimposed in this order, fixed so that no gap was formed between the metal disks, and formed into a roll having stripe-shaped grooves. At this time, the rolls of the laminated metal disks may be subjected to electroforming to integrate the respective metal plates to increase the strength.

Next, a glass substrate with electrodes was prepared in the same manner as in Example 1, and a paste-like partition wall forming material comprising a low-melting glass powder, a bratyl resin, a solvent, and a dispersant was formed in the stripe-shaped grooves of the roll. Was filled and pressed under pressure while rotating on a glass substrate with electrodes, and the partition wall forming material was transferred onto the glass substrate to form a partition wall forming body. At this time, an adhesive or an adhesive may be applied between the partition wall forming material and the glass substrate with electrodes. Further, at this time, if the partition wall forming material is cured on a roll before being transferred onto the glass substrate with electrodes, the partition wall forming material can be transferred without any chipping. Depending on the resin component of the partition wall forming material, a method of curing the partition wall forming material may be, for example, curing by drying a solvent, light curing by ultraviolet rays or the like, thermal curing, or the like.

Then, the glass substrate on which the above-mentioned partition wall formed body was formed was debindered while being kept at a predetermined temperature, and the firing atmosphere was appropriately changed according to the main components of each material. A partition having a thickness of 150 μm and a width of 50 μm could be formed with a good pitch at a pitch of 150 μm.

Example 5 A roll having stripe-shaped grooves was produced in the same manner as in Example 4.

Next, a glass substrate with electrodes was prepared in the same manner as in Example 1, and a paste-like partition wall forming material comprising a low-melting glass powder, a bratyl resin, a solvent and a dispersant was formed thereon to a thickness of 100 μm. It was applied uniformly.

The rib material layer applied on the glass substrate is pressure-pressed while rotating the stripe-shaped groove portion of the roll, and the rib-shaped material is formed by compositionally deforming the partition wall forming material layer. A formed body was formed.

Next, the glass substrate on which the partition wall-formed body was formed was debindered at a predetermined temperature, and the firing atmosphere was appropriately changed according to the main components of each material, and fired at a temperature of 550 to 580 ° C. for 10 minutes. A partition having a thickness of 150 μm and a width of 50 μm could be formed with a good pitch at a pitch of 150 μm.

<Embodiment 6> A metal plate A having a thickness of 50 μm
072 sheets and 1024 metal plates B1 having a thickness of 80 μm,
1024 metal plates B2 having a thickness of 100 μm and a thickness of 120
Only 1024 μm metal plates B3 are prepared. At this time, at least one side of each of the metal plates A, B1, B2, and B3 is processed into a linear shape having a length of 400 mm.

Next, the metal plates A, B1, B2, B3
A, B1, A, B2, A, B3, A, B1, A,...
・ Lay them alternately in this order.

With respect to the side a of the metal plate A processed linearly, the side b of the metal plate B1, B2, B3 processed linearly projects uniformly by 200 μm. Side a of the metal plate B and the side b of the metal plate B are aligned and fixed so as not to form a gap between the metal plates to obtain a striped mold.

Using the above-mentioned stripe-shaped mold, partitions were formed on the glass substrate with electrodes in the same procedure as in Example 1. A partition having a height of 150 μm and a width of 50 μm was formed with a cycle of 130 μm, 150 μm and 170 μm in pitch. It was possible to form with good shape.

[0052]

According to the method for forming a plasma display panel of the present invention, as described above, a mixture of a ceramic powder or a glass powder and a binder is formed on a substrate by using a striped groove of a molding die. Since the partitioning method is used, the partition wall forming material is extremely wasteless, and the partition walls can be formed by a low cost and simple process.

Further, since the forming die for the back plate of the plasma display panel according to the present invention is formed by laminating thin plates having a uniform thickness, it has a finer and higher aspect ratio,
And it can be easily manufactured with good shape, high accuracy.

Further, the mold for the back plate of the plasma display panel according to the present invention can be obtained by changing the film thickness of the thin plate used for manufacturing the mold and the step at the time of lamination so that the partition walls have any width, height and pitch. Can be easily responded to.

[Brief description of the drawings]

FIG. 1 is a schematic diagram (cross-sectional view) of a first embodiment.

FIG. 2 is a schematic diagram (cross-sectional view) of the first embodiment.

FIG. 3 is a schematic diagram (cross-sectional view) of the first embodiment.

FIG. 4 is a schematic diagram (cross-sectional view) of the first embodiment.

FIG. 5 is a schematic diagram (cross-sectional view) of the second embodiment.

FIG. 6 is a schematic diagram (cross-sectional view) of the second embodiment.

FIG. 7 is a schematic diagram (cross-sectional view) of the second embodiment.

FIG. 8 is a schematic diagram (cross-sectional view) of the second embodiment.

FIG. 9 is a schematic diagram (cross-sectional view) of the third embodiment.

FIG. 10 is a schematic diagram (cross-sectional view) of Embodiment 3.

FIG. 11 is a schematic diagram (cross-sectional view) of a third embodiment.

FIG. 12 is a schematic diagram (cross-sectional view) of the third embodiment.

FIG. 13 is a schematic diagram (cross-sectional view) of the third embodiment.

FIG. 14 is a schematic diagram (cross-sectional view) of the third embodiment.

FIG. 15 is a schematic diagram of Example 4.

FIG. 16 is a schematic diagram of Example 4.

FIG. 17 is a schematic diagram of a fifth embodiment.

FIG. 18 is a schematic diagram of Embodiment 6.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Metal plate A 2 ... Metal plate B 3 ... Side a4 ... Side b5 ... Partition wall forming material 6 ... Electrode 7 ... Glass substrate 8 ... Silicon rubber 9 ... Metal disk A 10 ... Metal disk B 11 ... Circular bar 12 ... Metal plate B1 13 ... Metal plate B2 14 ... Metal plate B3

Claims (9)

[Claims] 1. A plate A having the same thickness as the partition and a plate B having a thickness equal to the cell width are alternately laminated, and the plate B is more uniform than the plate A by the height of the partition. Molding for back panel of plasma display panel by stripe-shaped grooves that can be made to protrude. 2. The method according to claim 1, wherein the mold is filled with a mixture of a ceramic powder or a glass powder and a binder, and is brought into contact with a substrate made of ceramic or glass to form a partition on the substrate. A method for forming a back plate of a plasma display panel. 3. A partition is formed on a substrate made of ceramic or glass by pressing the mold of claim 1 onto a mixture of a ceramic powder or glass powder and a binder applied on a substrate made of ceramic or glass while applying pressure. A method for forming a back plate of a plasma display panel. 4. A plate A having the same thickness as the partition walls and a plate B having the same thickness as the cell width are alternately laminated, and the plate A is more uniform than the plate B by the height of the partition walls. A mold for the back plate of a plasma display, which is obtained by inverting and duplicating a stripe-shaped groove formed by projecting into a groove by electroforming, resin, wax or the like. 5. The plasma as claimed in claim 4, wherein said mold is filled with a mixture of ceramic powder or glass powder and a binder, and is brought into contact with a substrate made of ceramic or glass to form partition walls. A method of forming a rear panel of a display panel. 6. A disk A having the same thickness as the partition wall and a disk B having the same thickness as the cell width and having a radius shorter than the disk A by the height of the partition wall. A mold for a back plate of a plasma display panel having a cylindrical stripe-shaped groove formed by alternately stacking the centers of A and B in alignment. 7. A molding tool according to claim 6, which is filled with a mixture of ceramic powder or glass powder and a binder, and said cylinder is brought into contact with a substrate made of ceramic or glass and rotated to form a partition on the substrate. Forming a back plate of a plasma display panel. 8. A partition formed on a substrate made of ceramics or glass by rotating the molding die of claim 6 on a mixture of a ceramic powder or glass powder and a binder applied on a substrate made of ceramics or glass while applying pressure. A method for forming a back plate of a plasma display panel. 9. The method according to claim 1, 4 or 6,
A mold for a back plate of a plasma display panel, wherein at least two types of the plate B are used.