JP2000243264A - Barrier rib forming method and roller for plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method that can form barrier ribs of a plasma display panel(PDP) with high accuracy, is suitable for enhancing the precision of the PDP and to increase the size thereof, allows a manufacturing device to be miniaturized and reduced in scale, and can improve the yield thereof without material loss, and reduce a manufacturing cost. SOLUTION: An unset barrier rib forming material layer 50 having flexibility is formed on a glass substrate 14, and projections 96 of the barrier rib forming material which corresponds to the barrier ribs are formed by pressing/rolling a roller having grooves corresponding to the barrier ribs formed against/on the barrier rib forming material layer 50. The projections are dried and baked. A black antireflection layer 94a can be formed simultaneously with the formation of the barrier ribs, by superposing a black rib forming material layer on the barrier rib forming material layer and by pressing and rolling the roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming barrier ribs (partition walls) in a plasma display panel (hereinafter abbreviated as PDP), particularly a plasma display panel suitable as a thin and large-screen high-definition color display. And a roller used to carry out the above.

[0002]

2. Description of the Related Art A PDP used for a thin, large-screen, high-definition color display device or the like is provided with a pair of electrodes regularly arranged on two opposing glass substrates, and an N-electrode therebetween.
It has a structure in which a gas mainly composed of e or the like is sealed. A large number of small discharge spaces called discharge cells are formed by fine barrier ribs (partitions) on the rear substrate of the two glass substrates (the front substrate and the rear substrate). Phosphors are lined on the inner walls of these discharge cells. An electrode facing the discharge cell space is provided on the facing front substrate. Plasma is generated by the discharge between the electrodes, and the phosphor in the discharge cell emits light by the plasma to be used as a light emitting element of a screen.

In general, as a method of manufacturing a barrier rib (partition) for forming a discharge cell of a PDP, a printing lamination method and a sand blast method are known. In the printing lamination method, a process of printing and drying a glass paste on a rear substrate by a screen printing method is repeated until a height required for the barrier rib is reached.

In the sand blast method, a thick film of a barrier rib forming material (glass paste) is formed on a rear substrate, a subtractive resist pattern is formed on the thick film by a lithographic method, and a barrier rib forming material at a resist opening is formed. This is a method of removing by sandblasting (injecting fine particles mixed with compressed air at high speed and performing physical etching). Here, the resist pattern is removed after forming the barrier ribs.

[0005]

In the printing lamination method,
Since the thickness of a film that can be formed by one printing is up to several tens of μm, printing and drying are performed many times, generally 10 to obtain the required height of 100 μm to 200 μm for the barrier rib.
It needs to be repeated about once. Therefore, there is a problem that productivity is extremely low. In addition, since the coating formed by screen printing is concave at the periphery and convex at the center,
When the coating is performed many times, dripping of the cross-sectional shape is accumulated, and the bottom of the barrier rib is widened. For this reason, there is a limit in increasing the density of the barrier ribs, and further, there is a limit in pitch accuracy due to distortion and life of the screen (printing plate), and it has been difficult to increase the size, increase the definition, and mass-produce the PDP. .

[0006] On the other hand, the sand blast method complicates steps such as formation and removal of a resist pattern, and particularly when the screen is enlarged, the size of an exposure apparatus and a sand blast apparatus becomes large, resulting in a significant increase in equipment cost. Furthermore, material loss due to sandblast etching is large. For this reason, there is a problem that the production cost increases.

Further, both the printing lamination method and the sand blast method have a common problem that the shape of the molded body is easily deformed by shrinkage during firing in a subsequent step. In general, the shrinkage during firing can be reduced to some extent by increasing the content of the glass powder contained in the barrier rib forming material. However, in this case, the flowability of the barrier rib forming material decreases. For this reason, there has been a problem that the moldability of the micromachined surface is reduced and the shape of the molded body, that is, the fidelity of the shape is deteriorated.

In order to solve the problems peculiar to the conventional printing lamination method and the sand blast method, a pressure molding method in which a flat mold is pressed against a thick film of a barrier rib forming material formed on a substrate, a thin film pattern forming method, and the like. It is conceivable to use a photolithography technique widely used in the art.

The pressure molding method using a flat mold is an excellent method for solving the problems of the printing method and the sand blast method. However, the basic problem is that when the flat mold is peeled off from the substrate, a glass paste is used. However, there is a problem that it is easy to be partially peeled off from the substrate. For this reason, various measures are required to improve the adhesion between the glass substrate and the glass paste. For this reason, it is necessary to restrict the selection of the material or to add a new process. Further, it is difficult to manufacture a large precision mold corresponding to an increase in the size of the substrate, and the cost of the apparatus becomes enormous.

The photolithography method uses a photosensitive glass paste, and is characterized in that high resolution and precise rib formation is possible. However, this method involves the application / drying of photoresist, UV exposure, development, cleaning,
The drying and process are complicated and long, require extra materials such as photoresist and developer, require expensive and large floor occupancy equipment such as exposure equipment, developing equipment, and cleaning equipment. As compared with the photosensitive glass paste, the ratio of the resin to the glass is increased and the shrinkage ratio during firing is increased, the amount of material loss is large, and the like, resulting in an increase in cost.

The present invention has been made in view of the above circumstances, and can form a barrier rib (partition) for forming a discharge cell of a PDP with high precision, and is suitable for increasing the definition and size of a PDP. Simplify the process and downsize the manufacturing equipment
Enables downsizing, prevents material loss, improves yield, and reduces manufacturing costs.
A first object is to provide a method for forming a barrier rib of a PDP. It is a second object of the present invention to provide a roller used for carrying out this method.

[0012]

According to the present invention, a first object is to provide a method for forming a barrier rib of a plasma display panel having a large number of discharge cells separated by barrier ribs between a pair of glass substrates on which electrodes are formed. Forming a flexible uncured barrier rib forming material layer on at least one surface of the glass substrate on which the electrodes are formed; (b) forming grooves corresponding to barrier ribs on the outer peripheral surface of the barrier rib forming material layer Forming ridges corresponding to the barrier ribs on the glass substrate by rolling the applied roller; (c)
Drying the barrier rib forming material processed into the ridge in the step (b), and firing the material to form a barrier rib;
And a method of forming barrier ribs of a plasma display panel.

That is, a roller having an uneven pattern (groove pattern) formed by inverting the unevenness of the barrier rib on the outer peripheral surface is pressed against the barrier rib forming material while rotating. As the barrier rib forming material, a material which satisfies the required properties for forming a barrier rib by adding an additive such as alumina, tin oxide, titanium oxide, or zirconium oxide to a glass paste can be used. There are various types of PDPs such as an AC surface discharge type, a DC discharge type, and a hybrid type. According to the method of the present invention, a rib parallel to a stripe-shaped electrode, It is possible to form a rib having an appropriate structure corresponding to the PDP method, such as a rib perpendicular to the electrode or a grid-like rib.

The surface of the barrier rib forming material layer is preferably coated with a release material for improving the releasability from the roller. As the release material, for example, talc powder or powder of a Teflon-based additive, a paste containing these powders, a spray liquid in which these powders are dispersed in oil, or the like is suitable, and is thinly applied with a spray or a roll coater. . Further, it is preferable that the barrier rib forming material layer is softened by being immersed in the solvent vapor for a certain period of time and adjusted to an optimum hardness before rolling by a roller. The release agent may be applied after softening by the solvent vapor.

Here, the solvent may be any as long as it is compatible with the resin binder contained in the glass paste. For example, an aromatic solvent such as toluene or a higher alcohol is used. The softening of the glass paste by this solvent vapor
When the release material is coated, it is preferable to perform the coating before the coating for uniform softening. However, when the release material has a property of passing a solvent, the coating may be performed after the coating of the release material.

The barrier rib forming material layer is conveniently formed by laminating a glass paste sheet for ribs previously formed in a sheet shape on a glass substrate. However, it may be formed by applying and drying a liquid glass paste for ribs. The glass paste for ribs used in these is preferably white. This is because the light emitted in the discharge cells is reflected and guided to the PDP surface to improve the light use efficiency.

The barrier ribs are usually formed on the rear glass substrate. However, when the ribs are formed on the front glass substrate by the PDP method, the method of the present invention can be applied to the front glass substrate. Since the ribs can have various forms such as stripes and lattices, it goes without saying that the groove pattern on the surface of the roller corresponds to this. For example, an annular groove is formed in a roller when forming a striped rib, and a grid-shaped groove is formed in a roller when forming a grid-shaped rib.

The peripheral surface of the roller and the glass substrate need to move at the same speed without slippage at the contact portion. For this purpose, the two are relatively linearly moved while keeping the peripheral speed of the roller equal to the relative linear movement speed of the glass substrate relative to the roller. The roller may be relatively moved only once in one direction, or may be reciprocated once or a plurality of times through the same path (path). By passing the same path a plurality of times in this manner, the groove can be formed gradually deeper in the rib forming material layer, and the rib forming material can be prevented from adhering to the roller and peeling off from the glass substrate.

The pressing force of the roller against the glass substrate is:
20 to 200 kg / c based on the axial contact width of the roller
should be m. The pressing force should be changed depending on conditions such as the diameter of the roller, that is, the radius of curvature, and the hardness of the rib forming material layer. If the pressing force is 20 kg / cm or less, the convex portion of the roller cannot enter the rib forming material layer sufficiently deep, and it becomes difficult to increase the height of the barrier rib. If it is 200 kg / cm or more, the roller shaft is distorted, and the difference in pressing force between the vicinity of the center in the width direction of the roller and both sides becomes large, making it difficult to form a uniform rib.

The diameter of the roller is suitably 30 to 500 mm.
If the diameter is less than 30 mm, the roller is easily distorted,
If it is 0 mm or more, the contact area of the roller with the rib forming material layer becomes large, and this contact portion becomes close to surface contact, so that the rib forming material remains in the groove of the roller and easily peels off from the glass substrate.

The relative linear movement speed of the roller with respect to the glass substrate is preferably equal to the relative peripheral speed of the roller with respect to the glass substrate, and is 0.02 to 2.0 m / min (meter / m).
Minutes). When the speed is set to 0.02 m / min or less, productivity is significantly deteriorated, and when the speed is set to 2.0 m / min or more, the rib forming material is easily peeled from the glass substrate,
The groove of the roller cannot be deepened, and the rib cannot be made sufficiently high.

A groove formed in the roller, that is, a circumferential ring
Grooves and grid-like grooves are easily separated from the rib forming material layer
Should be. For example, a cut perpendicular to the length of the groove
The surface should be trapezoidal or chevron with a wide opening.
No. That is, the opening width of the groove is W_T, Bottom width W_BThe depth
H, pitch (pitch in the width direction of the groove) is L_PAs 0 <
W _B/ W_T<1.0, 0.1 <H / W_T<3.0, 0.1
<(W_T+ W_B) / 2L_PIt is better to be <1.0.

The first object is to provide a method for forming a barrier rib of a plasma display panel having a large number of discharge cells separated by barrier ribs between a pair of glass substrates on which electrodes are formed, wherein (a) at least one of the glass substrates Forming an uncured barrier rib forming material layer having flexibility on the surface on which the electrodes are formed; (b) forming a black anti-reflection layer at a position corresponding to the top of the barrier rib on the surface of the barrier rib forming material layer Step: (c) A roller having a groove formed on the outer peripheral surface corresponding to the barrier rib is rolled to the barrier rib forming material layer by aligning the groove with the black antireflection layer, thereby forming a ridge corresponding to the barrier rib. Step of forming on a glass substrate; (d) Drying and baking the barrier rib forming material with the black rib forming material processed into the ridge in the step (c) to form a black on the top. Forming a barrier rib provided with a color anti-reflection layer; and a barrier rib forming method for a plasma display panel, comprising the steps of:

In this case, a black antireflection layer can be simultaneously formed on the top surface of the barrier rib in the barrier rib forming step. For this reason, processing of the black antireflection layer (black mask) formed on the front glass substrate becomes unnecessary or simple.

This black anti-reflection layer can be formed on the rib forming material layer by screen printing corresponding to the pattern of the ribs such as stripes and lattices. Instead of screen printing, a sheet made of a white rib forming material and a black rib forming material corresponding to the position of the rib may be laminated on the rib forming material layer.

A first object is to provide a method for forming a barrier rib of a plasma display panel having a large number of discharge cells separated by barrier ribs between a pair of glass substrates on which electrodes are formed, and (a) at least one of the glass substrates (B) forming a flexible uncured barrier rib forming material layer on the surface on which the electrodes are formed; (b) uniformly coating a photosensitive black rib forming material on the surface of the barrier rib forming material layer; Forming a ridge corresponding to the barrier rib on the glass substrate by rolling a roller having a groove corresponding to the barrier rib formed on the outer peripheral surface of the barrier rib forming material layer coated with the photosensitive black rib forming material; (d) a step of leaving the black rib forming material only on the upper surface of the ridge by photolithography and removing the others; (e) forming the black rib processed into the ridge in the step (d). Drying the barrier rib forming material per step of forming a barrier rib by firing; it can be achieved by.

A second object of the present invention is a roller used in the method according to any one of claims 8 to 20, wherein two kinds of disks having different outer diameters are alternately brought into close contact in the axial direction and fixed. This is achieved by a roller characterized in that: In this case, the cross-sectional shape of the groove can be made trapezoidal or mountain-shaped by chamfering the outer peripheral edge of the disk having a large outer diameter. If a large disk is provided with a large number of cuts, a grid-like rib can be formed.

[0028]

FIG. 1 is an exploded perspective view showing an example of the structure of a PDP.
FIG. 2 is a view showing an embodiment of an apparatus used to carry out the method of the present invention, FIG. 3 is a view for explaining the principle, FIG. 4 is a partially enlarged view of the roller, and FIGS. FIG. 8 is a diagram showing a cross section different from FIG.
FIG. 4 is a perspective view showing a grid-like groove pattern of a roller. First, the structure of the PDP will be described with reference to FIG.

The PDP 10 shown in FIG. 1 is of the AC surface discharge type. In this PDP 10, first, data electrodes (address electrodes) 14 are formed in a stripe shape (interdigital shape) on a rear glass substrate 12, and the upper surface of the data electrode (address electrode) 14 is formed thereon.
6 covered with an insulating layer. A barrier rib (barrier) 18 having a height of about 0.1 mm (100 μm) is formed on the back dielectric layer 16 by a method described later. Here, the electrode 14 is formed in the vertical direction of the PDP 10 and the barrier rib 1
Reference numeral 8 is located between two electrodes 14 which are parallel to and adjacent to the electrode 14.

Next, a phosphor 22 is applied to the side surface of the barrier rib 18 and the groove 20 surrounded by the data electrode 14. In the case of the PDP 10 for color display, the phosphors 22 applied to the adjacent grooves 20 are arranged so as to be red, green, and blue. This vertically long groove 20 becomes a discharge space.

On the front glass plate 24, transparent electrodes 26 are formed in stripes (interdigital) in the horizontal direction. The entire surface of the glass substrate 24 including the transparent electrode 26 is covered with a transparent dielectric layer 28, and an MgO protective film 30 is further deposited thereon. In this PDP 10, the MgO protective film 30
A black mask 32 made of a black dielectric is formed in a lattice shape on the substrate to increase image contrast and improve image quality. That is, portions other than the openings of the discharge cells corresponding to the pixels are covered with the black mask 32.

The following method according to the present invention, that is, a method for forming the barrier ribs 18 on the rear glass substrate 12 is shown in FIGS.
8 will be described. According to the present invention, as shown in FIG. 3, an electrode 14 is formed in advance and a glass substrate 1 covered with a dielectric layer 16 is formed.
2, a rib forming material layer 50 is formed and is moved while being held by the carrier 52, and a roller 54 placed in a direction perpendicular to the moving direction of the carrier 52 is pressed against the rib forming material layer 50. Thus, the groove pattern formed on the roller 54 is transferred to the rib forming material layer 50. The barrier ribs 18 are formed by drying and firing.

In FIG. 3, reference numeral 56 denotes a motor for rotating the roller 54.
Of the transfer speed V. That is, when the radius of the roller 54 (for example, the average value of the radius of the outermost circumference and the radius with respect to the bottom of the groove) is R, and the rotational angular velocity is ω (radian / second), Rω = V.

An apparatus for performing the method can be configured as shown in FIG. In FIG. 2, reference numeral 58 denotes a carriage for moving the carrier 52. The carriage 58 is movable on a horizontal rail 60, and the carrier 52 is fixed horizontally on the upper surface thereof. Trolley 5
8 is linearly moved by a feed screw 64 rotated forward and reverse by a motor 62. In addition, the suction negative pressure sucked by the suction air pump 66 is guided to the surface of the transfer table 52, and the glass substrate 12 is held on the upper surface of the transfer table 52 by the suction negative pressure.

The roller 54 and the motor 56 are supported by a support shaft 68.
It is held at one end of a support arm 70 held swingably. The other end of the support arm 70 is pressed downward from above by a balance spring 72, and is pressed upward from below by a piston rod 74a of an air cylinder 74. The pressurized air of a pressurized air pump 76 is guided to the air cylinder 74 via a control valve 78,
The pressing force of the support arm 70 of FIG.
Can be controlled by Therefore, the pressing force of the roller 54 against the rib forming material layer 50 can be controlled by the control valve 78.

The groove pattern of the roller 54 used here is as follows.
It is needless to say that it corresponds to the shape of the rib 18 to be formed.
When the stripe-shaped ribs 18 shown in FIG. 1 are formed, an annular groove 80 formed at the same interval (pitch) as the ribs 18 is used as shown in FIG. Such rollers 54 have different diameters, for example, as shown in FIGS.
The seed disks 82 and 84 can be manufactured by alternately stacking the center disks 86 so as to coincide with each other.

When a rectangular groove 80 is formed as shown in FIG. 5, the difference in radius between the small-diameter disk 82 and the large-diameter disk 84 becomes the depth of the groove, that is, the height H. the thickness of the groove 80 opening width W _T and bottom width W _B next to both discs 82,
The total thickness of 84 is the pitch L _P of the grooves 80.

Since the cross-sectional shape of the groove 80 corresponds to the cross-sectional shape of the rib 18, the cross-sectional shape of the rib 18 can be changed by changing the cross-sectional shape. FIG.
According to the groove 80 having a rectangular cross section, the rib 18 having a substantially rectangular cross section is used.
Can be formed. FIG. 6 shows an inverted trapezoidal groove 80A.
FIG. 7 shows an inverted chevron groove 80B. The groove 80A can be formed by performing linear chamfering on both sides of the trapezoidal circular plate 84A to form a slanted peripheral portion, and alternately stacking this with the small-diameter circular plate 82A. Similarly, the grooves 80B may be formed by chamfering the peripheral edges of both surfaces of the large-diameter disk 84B in a circular shape in cross section, and alternately stacking them with the small-diameter disks 82B.

When the ribs 18 are formed in a lattice, a roll 54 having a groove pattern shown in FIG. 8 is used. That is, the groove frusto pyramidal projection 88 having a pitch L _P and the opening width W _T and the bottom width W _B corresponding to the discharge cell formed on the outer peripheral surface, perpendicular to each other between the projection 88 80C ,
The roll 54 on which 80C 'is formed is used.

Next, the rib forming step will be described with reference to FIGS. FIG. 9 is a flowchart of this process, and FIG. 10 is an explanatory diagram of each process. First, as described above, the back glass substrate 12 on which the electrodes 14 and the back dielectric layer 16 are formed is prepared (Step 500 in FIG. 9). FIG. 10A shows the glass substrate 12. On the surface of the glass substrate 12, FIG.
As shown in (A), a rib forming material layer 50 (see FIGS. 2 and 3).
Is formed (Step 502).

As a method for forming the rib-forming material layer 50, laminating a green sheet for a rib on the surface of the glass substrate 12 is convenient for good workability and for achieving a uniform thickness. This green sheet is a sheet in which a glass paste for ribs is sandwiched between protective sheets in the form of a sheet of uniform thickness. The protective sheet is peeled off and used. Instead of a green sheet,
Liquid rib glass paste may be applied to the glass substrate 12 to a uniform thickness and dried (step 5).
02A).

The glass paste for ribs used here has glass powder and a resin binder as main components, and an appropriate additive and solvent are added thereto to obtain desired characteristics. The glass powder contains sulfur (S), selenium (Se), and alum in addition to the silicate, and particularly contains lead oxide for the purpose of lowering the melting point. Various sintering aids are also added. The particle size of the powder is set to several tens of microns (μm) to sub-micron. As the resin binder, vinyl ether, methacrylate, urea resin, phenol resin, epoxy resin, unsaturated polyester resin, etc., and their precursors are used. The amount of the resin binder is 10 to 20 parts by weight based on 100 parts by weight of the glass powder.

Examples of the additives include a curing accelerator, a plasticizer, a dispersant, a wetting improver, a leveling agent, an antifoaming agent, an antioxidant, and an ultraviolet absorber. The solvent only needs to be compatible with the resin binder, and toluene, xylene,
Aromatic solvents such as phthalic acid esters, higher alcohols such as hexanol, octanol and oxyalcohol, and esters such as acetic acid esters are used.

The glass substrate 12 on which the rib forming material layer 50 is formed as described above is left in a solvent vapor for a certain period of time to soften the rib forming material layer 50 and improve the workability by the roll 54 (step 504). . Then, a release agent 90 is applied to the surface of the rib forming material layer 50 (see FIG. 10B).
After spraying (Step 50)
6) Roll the roller 54 (Step 508). Since a groove pattern is formed on the roller 54, the rib forming material flows and collects in the grooves 80 (80A to 80C, see FIGS. 4 to 8) of the groove pattern, as shown in FIG. A ridge 92 having a cross-sectional shape corresponding to the shape of the groove 80 of the roller 54 is formed.

The roller 54 may be rolled only once,
The same path (path) may be reciprocated once or plural times (step 510). Since the release agent 90 is applied to the rib forming material layer 50, the rib forming material does not adhere to the roll 54. Note that the release agent 90 may be applied to the surface of the roller 54 in advance. Further, it may be applied to both the roller 54 and the rib forming material layer 50. The thickness of the rib forming material layer 50 should be determined in consideration of the cross-sectional area of the groove 80 of the roller 54. The cross-sectional area of the groove 80 should be determined in consideration of the amount of shrinkage of the rib forming material after firing so that the shape of the ridge 92 after firing becomes the rib 18 having a desired height and width.

After the ribs 92 are formed by the rolling of the roller 54, the glass substrate 12 is sequentially placed in a drying furnace and a firing furnace (step 512). The drying furnace and the baking furnace may be the same, and the drying and the baking may be performed by sequentially raising the temperature according to a preset program. Here, the rib forming material forming the ridges 92 is dried and further fired to form a glass substrate with the barrier ribs 18 (step 514). Before drying and firing, ridges 92
If a black anti-reflective material is applied to the upper surface of the substrate by screen printing, the black anti-reflective layer serving as a black mask can be dried and fired simultaneously with the ribs 18.

[0047]

FIG. 11 is a flow chart of a rib forming step according to another embodiment, and FIG. 12 is an explanatory view of each step. In this embodiment, a black anti-reflection layer, that is, a black mask is formed on each rib at the same time when the ribs are formed.

First, a back glass substrate 12 on which an electrode 14 and a back dielectric layer 16 are formed is prepared (FIG. 12A, FIG. 1).
1 step 600). A glass paste for a rib is applied on the glass substrate 12 and dried to form a rib forming material layer 50 (FIG. 12B, step 602). Instead of applying and drying the glass paste, a green sheet of the glass paste may be laminated on the surface of the glass substrate 12. On the rib forming material layer 50 thus formed,
The black antireflection layer 94 is formed so as to correspond to the position of the rib (FIG. 12C, step 604). For example, a black dielectric liquid is applied by printing and dried.

Then, similarly to the process of FIG. 9, the paste softening process (step 606) and the release agent application (step 6)
08) to roll the roller 54 (step 61).
0). As a result, it is formed into a ridge 96 as shown in FIG. On the upper surface of the ridge 96, a layer 94A obtained by rolling the black anti-reflection layer 94 is formed. If necessary, the roller 54 is reciprocated (Step 612), and dried and fired (Step 614) to obtain the glass substrate 12 with ribs (Step 616). This rib has a black mask on the upper surface.

[0050]

FIG. 13 is an explanatory view of a rib forming step according to another embodiment. In the embodiment shown in FIG. 12, the rib forming material layer 50 is provided only at positions corresponding to the ribs on which the black antireflection layer 94 is directly printed on the surface of the rib forming material layer 50.
It is formed in. On the other hand, in the embodiment shown in FIG. 13, the green sheet 1 separate from the rib forming material layer 50 is provided.
Sheet 10 on which black anti-reflection layer 102 is printed
0A is laminated on the entire surface of the rib forming material layer 50.

That is, a green sheet 100 (FIG. 13B) of a glass paste for a rib is prepared (step 618 in FIG. 11), and a black anti-reflection layer 102 is printed thereon at a position corresponding to the top surface of the rib. (Step 62
0). The green sheet 100A with the black anti-reflection layer 102 is laminated on the glass substrate 12 with the electrodes 14 shown in FIG. 13A (step 622, FIG. 13).
(C)). Then, paste softening treatment (step 60)
6) If the roller 54 is rolled after the release agent is applied (step 608), the ribs 104 of the rib forming material are formed as shown in FIG. Due to the rolling pressure of the roller 54, the rib forming material and the black antireflection layer 102 sandwiched between the ridges on the surface of the roller 54 and the surface of the glass substrate 12 (the back dielectric layer 14) cause the grooves 80 ( (See FIGS. 4 to 8)
Gathered in. Therefore, the black anti-reflection layer 102 is collected on the upper surface of the ridge 102 to form the layer 102A.

[0052]

[Other Embodiment] FIG. 14 is an explanatory view of a process in another embodiment. In this embodiment, a white rib forming material layer 50 is formed on a glass substrate with electrodes 12 (FIG. 14A) (FIG. 14B). On the other hand, a stripe sheet 114 in which black rib-forming members 110 and white rib-forming members 112 are alternately arranged in a stripe shape is prepared (FIG. 14).
(C)) The sheet 114 is laminated on the rib forming material layer 50 of the glass substrate 12 (FIG. 14D). Then, the roller 54 is pressed to form the ridge 116.

Here, the black rib forming material 110 of the stripe sheet 114 is located at every interval between the ribs 18 to be formed. When laminating the stripe sheet 114 to the rib forming material layer 50, the black rib forming material 110
4 (see FIGS. 4 to 8). As a result, the black rib forming material 110 becomes a layer 110A that covers the upper surface of the ridge 116.

[0054]

FIG. 15 is an explanatory view of a process in another embodiment. This embodiment uses a photosensitive black rib forming material,
The black rib forming material is formed only on the upper surface of the ridge by using a photolithography technique. That is, FIG.
A rib forming material layer 50 is formed on the electrode-attached glass substrate 12 shown in FIG. 15A (FIG. 15B), and a photosensitive black rib forming material 120 is applied thereon with a uniform thickness (FIG. 15).
(C)).

When the roller 54 is pressed, the white glass paste of the rib forming material layer 50 is applied to the groove 20 of the roller 54.
(See FIGS. 4 to 8) to form the ridge 122. At this time, a white glass paste of the rib forming material layer 50 and a thin layer of the black rib forming material 120 remain between the ridges 122. The black rib forming material 120 is also provided on both side surfaces of the ridge 122.
A thin layer of remains. Next, ultraviolet exposure is performed through a photomask 124 to develop and cure only the black rib forming material 120A at a position corresponding to the top surface of the rib (FIG. 15D). Is removed, the black rib forming material 120A is formed on the upper surface as shown in FIG.
Ridges 122 of a white rib forming material having

[0056]

According to the present invention, a roller in which a flexible uncured barrier rib forming material layer 12 is formed on a glass substrate, and a groove pattern corresponding to the barrier rib is formed, is used as the barrier rib forming material layer. Is formed by forming the ribs of the barrier rib forming material corresponding to the barrier ribs, and then drying and firing the barrier ribs to form the barrier ribs. Therefore, the barrier ribs can be formed with high precision, and the PDP can be highly defined. And suitable for upsizing.

Further, the number of steps is reduced, and the manufacturing apparatus can be reduced in size and size. Further, since all the materials of the barrier rib forming material layer formed on the glass substrate are gathered together on the ridges and used as the barrier ribs, the material loss of the barrier rib forming material does not occur and the number of processes is small, so that the production yield is increased. In addition, the manufacturing cost can be reduced.

According to the seventeenth to twentieth aspects of the present invention, the black antireflection layer is simultaneously formed on the upper surface of the rib in the barrier rib forming step. Productivity is further improved. According to the twenty-first aspect, a roller used in the present invention is obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a structural example of a PDP.

FIG. 2 shows an embodiment of an apparatus used to carry out the method of the present invention.

FIG. 3 is a diagram illustrating the principle.

FIG. 4 is a partially enlarged view of a roller.

FIG. 5 is a cross-sectional view of a cross-sectional shape of a roller groove taken along a roller central axis.

FIG. 6 is a cross-sectional view of another cross-sectional shape of the groove of the roller taken along the central axis of the roller.

FIG. 7 is a cross-sectional view of another cross-sectional shape of the groove of the roller taken along the central axis of the roller.

FIG. 8 is a perspective view showing a grid-like groove pattern of a roller.

FIG. 9 is a flowchart of a rib forming step.

FIG. 10 is an explanatory view of each step.

FIG. 11 is a flowchart of a rib forming step according to another embodiment.

FIG. 12 is an explanatory view of each step.

FIG. 13 is a flowchart of a rib forming step according to another embodiment.

FIG. 14 is a process explanatory view of another embodiment.

FIG. 15 is a process explanatory view of another embodiment.

[Explanation of symbols]

Reference Signs List 10 PDP (Plasma Display Panel) 12 Back glass substrate 14 Data electrode 16 Back dielectric layer 18 Barrier rib 20 Barrier rib groove (discharge space) 24 Front glass substrate 50, 100 Barrier rib forming material layer 54 Roller 56 Roller driving motor 80, 80A-C, 80C Roller groove 82, 84 Disk 90 Release agent 92, 96, 104, 116, 122 Ridge 94, 94A, 102, 102A, 110A, 120A
Black antireflection layer 100 Green sheet 100A Sheet with black antireflection layer 110, 120 Black antireflection material 114 Stripe sheet

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinya Yamazaki 1005 Koizono, Ayase-shi, Kanagawa Fuji Micrographics Co., Ltd. (72) Inventor Takashi Utsumi 1005 Koizono, Ayase-shi, Kanagawa Fuji Micrographics Co., Ltd. (72) Inventor Toru Kubo 1005 Koizono, Ayase-shi, Kanagawa F-term in Fuji Micrographics Co., Ltd. 5C027 AA09 5C040 FA01 GB03 GB14 GF02 GF13 GF19 GH07 JA19 JA40 MA25 MA26

Claims (21)

[Claims] 1. A method for forming a barrier rib of a plasma display panel having a large number of discharge cells separated by barrier ribs between a pair of glass substrates on which electrodes are formed, comprising: (a) forming the electrode on at least one of the glass substrates; Forming an uncured barrier rib forming material layer having flexibility on the formed surface; (b) corresponding to the barrier rib by rolling a roller having a groove corresponding to the barrier rib on the outer peripheral surface of the barrier rib forming material layer Forming a ridge on the glass substrate; and (c) drying and firing the barrier rib forming material processed into the ridge in step (b) to form a barrier rib. A method for forming a barrier rib of a plasma display panel, comprising: 2. The method of forming a barrier rib of a plasma display panel according to claim 1, further comprising: (a-1) a step of coating the surface of the barrier rib forming material layer with a release material after the step (a). . 3. The method according to claim 1, wherein the glass substrate is left in a solvent vapor of the barrier rib-forming material for a certain time to reduce the hardness of the barrier rib-forming material. Adjusting the barrier ribs of the plasma display panel. 4. The method according to claim 2, wherein the step (a-1) is followed by the following step: (a-3) leaving the glass substrate in a solvent vapor of the barrier rib forming material for a certain period of time to harden the barrier rib forming material. Adjusting the barrier ribs of the plasma display panel. 5. The plasma display panel according to claim 1, wherein the barrier rib forming material layer in step (a) is formed by laminating a green sheet of a glass paste for a rib on a glass substrate. Barrier rib forming method. 6. The method according to claim 1, wherein the barrier rib forming material layer in the step (a) is formed by applying a glass paste for a rib on a glass substrate and drying the glass paste. Forming method. 7. The method according to claim 1, wherein the barrier rib is formed on a rear glass substrate. 8. The plasma display panel according to claim 1, wherein the electrodes are formed in a stripe shape on the glass substrate, and the roller has a plurality of annular grooves on its outer peripheral surface to form striped barrier ribs. Barrier rib forming method. 9. The method according to claim 8, wherein the roller is rolled with an annular groove formed between the striped electrodes. 10. The method according to claim 8, wherein the roller is rolled with the annular groove in a direction perpendicular to the stripe-shaped electrodes. 11. The roller according to claim 1, wherein the roller is provided with grooves orthogonal to each other in a circumferential direction and an axial direction on an outer peripheral surface thereof, and the roller is rolled to a barrier rib forming material layer to form a grid-like barrier rib. A method for forming a barrier rib of such a plasma display panel. 12. The method according to claim 1, wherein the roller in step (b) is reciprocally moved reciprocally through the same path while making its peripheral speed coincide with the relative linear movement speed of the glass substrate. A method for forming a barrier rib of a display panel. 13. The pressing pressure of the roller against the glass substrate is set to 20 to 200 with respect to the axial contact width of the roller.
The method for forming a barrier rib of a plasma display panel according to any one of claims 1 to 12, wherein the barrier rib is kg / cm. 14. The method according to claim 1, wherein the roller has a diameter of 30 to 500 mm. 15. The method according to claim 1, wherein a relative movement speed of the glass substrate with respect to the roller and a relative peripheral speed of the roller with respect to the glass substrate are 0.02 to 2.0 m / min. . 16. The method according to claim 1, wherein the groove of the roller is provided.
Sets the opening width to W _T, Bottom width W_B, Depth H, pitch
To L_PAs 0 <W_B/ W_T<1.0, 0.1 <H / W_T
<3.0, 0.1 <(W_T+ W_B) / 2L_P<1.0, and
To form barrier ribs for plasma display panels
Law. 17. A method for forming a barrier rib of a plasma display panel having a large number of discharge cells separated by barrier ribs between a pair of glass substrates on which electrodes are formed, comprising: (a) forming the electrode on at least one of the glass substrates; Forming a flexible uncured barrier rib-forming material layer on the surface thus formed; (b) forming a black anti-reflection layer at a position corresponding to the top of the barrier rib on the surface of the barrier rib-forming material layer; (c) A roller having a groove corresponding to the barrier rib formed on the outer peripheral surface is formed on the glass substrate by aligning the groove with the black antireflection layer and rolling the barrier rib forming material layer on the glass substrate. (D) drying and firing the barrier rib-forming material with the black rib-forming material processed into the ridge in the step (c) to form a black anti-reflection layer on the top. Barrier ribs forming method of a plasma display panel, comprising the steps of: forming a labeled the barrier ribs. 18. The method of claim 17, wherein step (b)
The black antireflection layer is formed by screen printing. 19. The method of claim 17, wherein step (b)
The black anti-reflection layer is formed by laminating a sheet in which a white rib forming material and a black rib forming material arranged at positions corresponding to the barrier ribs are formed in a sheet shape on the rib forming material layer, and forming a barrier rib of the plasma display panel. Method. 20. A method of forming a barrier rib of a plasma display panel having a large number of discharge cells separated by barrier ribs between a pair of glass substrates on which electrodes are formed, comprising: (a) forming the electrodes on at least one of the glass substrates; Forming a flexible uncured barrier rib-forming material layer on the surface of the barrier rib-forming material; (b) uniformly coating a photosensitive black rib-forming material on the surface of the barrier rib-forming material layer; (c) the photosensitive black color A step of forming, on a glass substrate, ridges corresponding to the barrier ribs by rolling a roller having grooves corresponding to the barrier ribs formed on an outer peripheral surface of the barrier rib forming material layer to which the rib forming material is applied; (d) photolithography A step of leaving the black rib forming material only on the upper surface of the ridge and removing the others by the method of (e); (e) a burr with the black rib forming material processed into the ridge in the step (d). Forming a barrier rib by the rib forming material is dried and calcined; 21. A roller used in the method according to claim 8, wherein two kinds of disks having different outer diameters are alternately brought into close contact in the axial direction and fixed.