KR20080067811A - Plasma display panel and manufacturing method thereof - Google Patents

Abstract

A plasma display panel and a manufacturing method thereof are provided to enhance a ventilating property of the PDP(Plasma Display Panel) by coupling discharge spaces of adjacent discharge cells with each other. A PDP includes a first substrate(11), a second substrate(13), and a barrier rib(12). The first substrate includes a first electrode, a first dielectric material(14), and a protective film(18). The second substrate includes a second electrode(15), a second dielectric material(17), and a fluorescent material. The first and second substrates are apart from each other with the barrier rib between them. The barrier rib defines discharge cells between the first and second substrates. Discharge spaces of adjacent discharge cells are coupled with each other.

Description

Plasma display panel and manufacturing method thereof {PLASMA DISPLAY PANEL AND MANUFACTURING METHOD THEREOF}

1 is a structural diagram showing the structure of a general plasma display panel.

2 to 3 are structural diagrams illustrating a barrier rib structure of a general plasma display panel.

4 is a cross-sectional view of a plasma display panel according to an embodiment of the present invention.

5 to 6 are top views illustrating a barrier rib structure of a plasma display panel according to an exemplary embodiment of the present invention.

7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel according to an embodiment of the present invention.

8 is a schematic block diagram illustrating a method of manufacturing a partition wall according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

11: first substrate (front substrate)

13: second substrate (rear substrate)

59 and 60: first electrode (sustain electrode pair)

X1, 15: second electrode (address electrode)

12: bulkhead

12a: upper and lower line separating bulkhead

The present invention relates to a method of manufacturing a plasma display panel, and more particularly, to a method of manufacturing a plasma display panel including a differential partition wall.

In general, in the plasma display panel, a partition wall formed between the front panel and the rear panel constitutes one discharge cell, and each discharge cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays (Vacuum Ultraviolet Rays) and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 is a block diagram showing the structure of a general plasma display panel.

As illustrated in FIG. 1, a plasma display panel includes an upper substrate on which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are formed on the front glass 101, which is a display surface on which an image is displayed. The lower substrate 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface and the rear surface is coupled in parallel with a predetermined distance therebetween. do.

The upper substrate 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge each other in one discharge cell and maintain light emission of the discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper dielectric layer 104 top surface. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The lower substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, partitions 112 of stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112. The upper surface of the lower substrate 110 is coated with R, G, and B phosphors 114 which emit visible light for image display during address discharge. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

Here, the above-described partition 112, the upper surface of the front glass 101 absorbs the external light generated from the outside to reduce reflection and improve the color purity (purity) and contrast of the front glass 101, etc. The black layer 116 functioning as an array is configured.

On the other hand, the partition wall 112 for forming a plurality of discharge spaces, that is, discharge cells on the lower substrate 110 is divided into a stripe type and a mesh type (well type) according to the structure. The partition structure 112 is variously designed in consideration of brightness characteristics, exhaust characteristics, phosphor coating area, and the like.

2 to 3 are structural diagrams illustrating a barrier rib structure of a general plasma display panel.

FIG. 2 is a stripe type structure in which the partition walls 21 formed on the lower dielectric layer 13b on the rear glass 20 are arranged in a row, and the partition walls 21 are scan electrodes (not shown) formed of a bus electrode and a transparent electrode. And perpendicular to the sustain electrode (not shown). The stripe-type barrier rib structure has a bus electrode exposed to the discharge space, so that the interaction with the address electrode of the rear glass 20 is smooth, the manufacturing process is simple, and gas such as residual air or impurity gas in the exhaust and gas injection process. Although there is an advantage that it can be easily exhausted, there is a problem that it is difficult to prevent cross-talk (cross-talk) in all directions.

FIG. 3 is a mesh type structure in which the partition wall formed on the lower dielectric layer 13b on the rear glass 20 has a lattice shape. As illustrated, the partition wall 21 is a scan electrode (not shown) formed of a bus electrode and a transparent electrode. And vertically arranged with the sustain electrode (not shown). The mesh type barrier rib structure has a large phosphor coating area of each discharge cell, which can increase luminance, and can prevent crosstalk in all directions. However, residual air or impurities in the exhaust and gas injection processes can be avoided. There is a problem in that gases such as gas cannot be easily exhausted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a plasma display panel including a partition structure having improved exhaust characteristics and a method of manufacturing the same.

It is another object of the present invention to provide a plasma display panel including a partition structure and a method of manufacturing the same, which can prevent crosstalk, reduce erroneous discharge, and improve image quality, thereby improving overall reliability. .

In order to achieve the above object, a plasma display panel according to the present invention includes a first substrate having a first electrode, a first dielectric, and a protective film, a second substrate having a second electrode, a second dielectric, and a phosphor, and the first substrate. The first and second substrates are spaced apart in parallel to partition the discharge cells, and at least one neighboring discharge cell and the discharge space are characterized in that they comprise a barrier rib structure.

Here, the partition wall has an open structure in which at least one of the upper and lower surfaces of the discharge cell line is open, and has a protrusion protruding toward the first electrode.

The protrusion has a width of 20 μm or less and is formed in at least one of a rhombus, a triangle, and an oval.

In addition, the partition wall has no structure of a line separation partition that is a boundary between the upper and lower discharge cell lines, and has a common exhaust path on one open side.

Furthermore, as the asymmetric structure of R (Red), G (Green), and B (Blue) discharge cells are different, the size of B (Blue) discharge cell is the largest and the ratio of these asymmetric structures is R: G: B = 0.9-1: 1: 0.9-1.1.

In order to achieve the above object, the manufacturing method of the plasma display panel according to the present invention,

(a) forming a first electrode, a first dielectric, and a protective film on the first substrate

(b) forming barrier ribs having a structure in which a second electrode, a second dielectric, at least one neighboring discharge cell, and a discharge space are connected to each other on a second substrate;

(c) bonding the first substrate and the second substrate to produce a panel.

The forming of the barrier rib in the step (b) may include forming a barrier layer on a second dielectric of the second substrate, and connecting the barrier layer to at least one neighboring discharge cell and a discharge space. Patterning with a mask, and developing and firing the patterned partition to form a partition.

The patterning of the barrier layer is patterned such that at least one of the top and bottom surfaces of the discharge cell line protrudes in the up and down direction in an open structure.

In this case, the protrusion is 20㎛ or less in width, patterned in at least one of the shape of a rhombus, triangle, ellipse.

The patterning of the barrier layer may be performed by patterning the structure without the line separation barrier that is a boundary between the upper and lower discharge cell lines, thereby having a common exhaust path on one open side of the upper and lower discharge cell lines.

In addition, the patterning of the barrier layer may include asymmetric structures having different sizes of R (Red), G (Green), and B (Blue) discharge cells, and pattern the largest size of the B (Blue) discharge cell.

The ratio of said different asymmetric structure is set to R: G: B = 0.9-1: 1: 0.9-1.1.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the accompanying drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. On the other hand, when a part such as a layer, film, region, plate, etc. is formed or positioned on another part, it is formed directly on the other part and not only in direct contact but also when another part exists in the middle thereof It should also be understood to include.

Here, the first substrate is an upper substrate of a plasma display panel in which a sustain electrode pair consisting of a transparent electrode and a bus electrode, an upper dielectric layer, and a passivation layer are sequentially formed, and the second substrate is an address electrode and a lower dielectric layer for generating a discharge electrode pair and a discharge electrode. The lower substrate of the plasma display panel is sequentially formed, and the electrode and dielectric provided in the first substrate are referred to as the first electrode and the first dielectric, and the electrode and dielectric provided in the second substrate are similar to the second electrode. It will be referred to as a second dielectric.

4 is a cross-sectional view of a plasma display panel according to an embodiment of the present invention.

As shown in FIG. 4, the plasma display panel includes a first electrode 59 which is a pair of sustain electrodes formed of transparent electrodes 59a and 60a and metal bus-type bus electrodes 59b and 60b on the first plate 11. And a protective film 18 including MgO having a thickness of 1 μm on the surface of the first dielectric layer 14 for AC driving and the first dielectric layer 14.

On the other hand, on the second substrate 13 facing the first substrate 11, the second electrode 15 serving as an address electrode disposed orthogonal to the first electrodes 59 and 60 of the first substrate 11. Is formed, and the second dielectric layer 17 is formed on the second electrode 15.

A plurality of partitions 12 are formed on the second dielectric layer 17 to form first, second, and third discharge cells, which are formed at predetermined heights and are discharge spaces R, G, and B, respectively.

The protective film 18 on the side of the first substrate 11 functions to protect the first dielectric layer 14 which is to be directly exposed to the plasma in the cell against ion shock, thereby damaging the first dielectric layer 14. To prevent them. In addition to this function, the protective film 18 also has a function of emitting secondary electrons for gas discharge when a voltage is applied between the electrodes, and a function of providing high insulation sufficient to accumulate and hold wall charges. Among them, the function of providing high insulation is important for lowering the discharge start voltage and obtaining a short response time of the plasma display panel.

In the plasma display panel according to the present invention, a plurality of partitions 12 are formed on the second dielectric layer 17 at a predetermined height to form first, second, and third discharge cells, which are discharge spaces R, G, and B, respectively. They are formed of LBR (Linked Barrier Rib) 12, which is a partition 12 having a structure in which at least one neighboring discharge cell and a discharge space are connected to each other, rather than the existing stripe type or mesh type.

The partition wall 12 can easily exhaust gases such as residual air or impurity gas in the exhaust and gas injection process of the plasma display panel, and can prevent crosstalk in all directions. Discharge can be reduced. Therefore, it is possible to provide a plasma display panel with improved overall reliability.

The above-described partition wall 12 structure will be described in detail according to the embodiments described below.

5 to 6 are top views illustrating a barrier rib structure of a plasma display panel according to an exemplary embodiment of the present invention.

5A to 5D show a structure in which a partition wall 12a is formed to form a boundary between an upper and a lower discharge cell line, and at least one neighboring discharge cell and a discharge space formed on a second substrate serving as a rear substrate of the plasma display panel. A structural view of the partition walls 12 connected to each other is seen from above.

As shown in FIG. 5A, the partition wall 12 having a structure in which at least one neighboring discharge cell and a discharge space are connected to each other according to the present invention forms a linked structure in the form of a spherical waveform along an up / down discharge cell line. have. The linked structure is an open structure in which at least one of the upper and lower surfaces of the discharge cell line is open, and easily exhausts gases such as residual air or impurity gas toward the open side in the exhaust and gas injection process of the plasma display panel. In addition, since crosstalk in all directions can be prevented, erroneous discharge of the plasma display panel can be reduced.

Here, the partition 12 may have a protrusion protruding in an up / down direction, which is a direction overlapping with the first electrodes 14 and 16, and the protrusion may have a width of 20 μm or less. In addition, the partition wall 12 may be easily performed without additional processes by patterning the partition wall 12 using a mask having a partition structure shown in FIG. 5A during the partition wall manufacturing process.

The protrusion may be formed in various ways according to the structure of the mask used during the barrier rib manufacturing process, and may be any one selected from a rhombus, a triangle, and an oval.

5b to 5d are structural views showing various shapes of protrusions of the partition 12 having at least one neighboring discharge cell and a discharge space connected to each other, and FIG. 5b is patterned in a rhombus pattern to form protrusions of a rhombus shape. 5C is a structural diagram in which the protrusions are triangular by patterning in a triangular pattern, and FIG. 5D is a structural diagram in which the protrusions are oval in patterned with an elliptical pattern.

In addition, the partition wall 12 of the structure in which at least one neighboring discharge cell and the discharge space are connected to each other according to the present invention has a size of a discharge cell of R (Red), G (Green), and B (Blue) to correct a color temperature difference. May have different asymmetric structures.

The asymmetry maximizes the size of the B (Blue) discharge cell, and the ratio of the asymmetric structure is R: G: B = 0.9 to 1: 1: 0.9 to 1.1, so that the most suitable color can be realized for Asian vision. have. Therefore, the plasma display panel excellent in visibility can be implemented.

6A to 6D show a structure in which there is no line separation barrier 12a that is a boundary between an upper and a lower discharge cell line, and at least one neighboring discharge cell and a discharge formed on a second substrate serving as a rear substrate of the plasma display panel. The structure of the partition 12 of a space connected with each other is the structural view seen from the top.

As illustrated in FIG. 5A, at least one neighboring discharge cell and a partition 12 having a discharge space connected to each other according to the present invention have a structure in which the upper and lower discharge cell lines are linked in a spherical wave form. The linked structure is an open structure in which at least one of the upper and lower surfaces of the discharge cell line is open, and easily exhausts gases such as residual air or impurity gas toward the open side in the exhaust and gas injection process of the plasma display panel. The structure has a common exhaust path on one open side of the up / down discharge cell line.

That is, not only the adjacent adjacent discharge cells, but also the remaining air or the discharge cells of the discharge cells Blue Cell (61), Green Cell (62), Red Cell (63) with the upper and lower lines separated as shown in Figure 6a It is a structure that can prevent gases such as impurity gas and crosstalk with adjacent cells at the same time.

Therefore, it is possible to easily exhaust gases such as residual air or impurity gas along the common exhaust path, and to prevent crosstalk in all directions, thereby reducing misdischarge of the plasma display panel.

Likewise, the partition 12 may have a protrusion protruding in an up / down direction, which is a direction overlapping with the first electrodes 14 and 16, and the protrusion may have a width t of 20 μm or less. . In addition, the partition wall 12 may be easily performed without a further process by patterning the mask 12 using at least one neighboring discharge cell and a discharge space connected to each other in the partition fabrication process.

The protrusion may be formed in various ways according to the structure of the mask used during the barrier rib manufacturing process, and may be any one selected from a rhombus, a triangle, and an oval.

6B to 6D illustrate various shapes of protrusions of the partition 12 having a structure in which at least one neighboring discharge cell and a discharge space are connected to each other. FIG. 6B is patterned in a rhombus pattern to form protrusions. 6C is a structural diagram in which the protrusions are triangular by patterning in a triangular pattern, and FIG. 6D is a structural diagram in which the protrusions are oval in patterned with an oval pattern.

In addition, the partition wall 12 of the structure in which at least one neighboring discharge cell and the discharge space are connected to each other according to the present invention has a size of a discharge cell of R (Red), G (Green), and B (Blue) to correct a color temperature difference. May have different asymmetric structures.

The asymmetry increases the size of the B (Blue) discharge cell, and the ratio of the different asymmetric structures is set to R: G: B = 0.9 to 1: 1: 0.9 to 1.1 to realize the most suitable color for the Asian vision. Can be.

7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel according to an embodiment of the present invention.

The manufacturing method of the plasma display panel according to the present invention includes the manufacturing process of the first substrate to be the front panel listed on the right side of FIG. 7, the manufacturing process of the second substrate to be the rear panel listed on the left side, and the sealing process listed below. Including assembly process.

First, the manufacturing process of the first substrate listed on the right side of FIG. 7 will be described. First, after preparing the first substrate which is the glass substrate used as a base material (71), the 1st electrode used as a some sustain electrode pair is formed in order on the said 1st board | substrate. Next, a first dielectric layer is formed on an upper surface of the first electrode, and a protective layer made of magnesium oxide (Mgo) for protecting the first electrode is formed (72).

Next, the manufacturing process of the second substrate to be the rear panel listed on the left side of FIG. Similarly to the first substrate, the second substrate is prepared by preparing a second substrate, which is a glass substrate to be a substrate (73), and glassing the second electrodes, which are a plurality of address electrodes, so as to face and cross the first electrode formed on the first substrate. It is formed on a substrate. Thereafter, a second dielectric layer is formed on an upper surface of the second electrode, and at least one neighboring discharge cell and a discharge space of the structure are connected to each other on the upper surface of the second dielectric layer (LBR: Linked Barrier Rib) ( 12) (74). Next, a phosphor is coated on the formed partition wall to form a phosphor layer (75).

Next, the first substrate and the second substrate thus manufactured are sealed to each other and bonded (76).

Next, the gas or gas existing in the plasma display panel is completely exhausted and then removed, and then discharge gas such as Xe, Ne, Ar, etc. is injected into the plasma display panel through an exhaust port (76), and the torch is The manufacturing of the plasma display panel is completed by melting and sealing the middle portion of the exhaust port (77).

FIG. 8 is a schematic block diagram illustrating a step 74 of forming a partition wall having a structure in which at least one neighboring discharge cell and a discharge space are connected to each other.

First, a barrier rib layer is formed on a second dielectric of the second substrate (81), and then the barrier rib layer is patterned using at least one neighboring discharge cell and a discharge structure as a mask of a structure LBR connected to each other ( 82) Next, the patterned partition wall is developed and baked to form a partition wall in which at least one neighboring discharge cell and a discharge space are connected to each other (83).

Herein, the method 82 for patterning the at least one neighboring discharge cell and the discharge space as a mask having a structure in which the discharge spaces are connected to each other has a single open structure in which at least one of the upper and lower surfaces of the discharge cell line is open. Pattern to protrude downward.

In this case, the protrusion may have a width t of 20 μm or less, and the protrusion may be patterned to have any one of a rhombus, a triangle, and an ellipse.

In addition, the patterning of the barrier layer may be patterned into a structure in which there is no line separation barrier that is a boundary between the upper and lower discharge cell lines.

At this time, the patterning of the structure without the line separating partition wall is patterned into a structure having a common exhaust path on one open side of the upper and lower discharge cell lines, R (Red), G (Green), B (Blue) discharge cells Patterns can be patterned into different asymmetric structures.

Such asymmetrical patterning causes the ratio of the asymmetrical structure to be the largest in the size of the B (Blue) discharge cell so that R: G: B = 0.9 to 1: 1: 0.9 to 1.1.

Here, the method of manufacturing a barrier rib having a structure in which the at least one neighboring discharge cell and the discharge space are connected to each other may be patterned using at least one of a photosensitive method, an etching method, a sand blasting method, and a laser imaging method. The photosensitive method of patterning is most preferable as a mask on which the pattern of the structure shown in FIGS. 5 to 6 is drawn.

Meanwhile, terms used in the present invention are terms defined in consideration of functions in the present invention, which may vary according to the intention or customs of those skilled in the art, and the definitions are used throughout the present disclosure. It should be based on.

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention.

According to the plasma display panel and the method for manufacturing the same according to the present invention as described above, to provide a plasma display panel and a method for manufacturing the same comprising at least one neighboring discharge cell and the partition wall structure connected to each other, There is an effect of improving the exhaust characteristics of the plasma display panel.

In addition, according to the plasma display panel and the method of manufacturing the same according to the present invention, it is possible to prevent crosstalk, to reduce erroneous discharge and to improve image quality, thereby improving overall reliability of the plasma display panel.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (25)

A first substrate having a first electrode, a first dielectric, and a protective film; A second substrate having a second electrode, a second dielectric, and a phosphor; And And partitioning the discharge cells by separating the first substrate and the second substrate in parallel and partitioning the at least one neighboring discharge cell with the discharge space. The method of claim 1, wherein the partition wall, And at least one of the top and bottom surfaces of the discharge cell line has an open structure. The method of claim 1 or 2, wherein the partition wall, And a protrusion protruding in the up / down direction. The method of claim 3, wherein the protrusions, A plasma display panel having a width of 20 µm or less. The method of claim 3, wherein the protrusions, Plasma display panel, characterized in that the rhombus. The method of claim 3, wherein the protrusions, Plasma display panel, characterized in that the triangle. The method of claim 3, wherein the protrusions, An oval plasma display panel. The method of claim 1 or 2, wherein the partition wall, A plasma display panel, characterized in that there is no line-separating partition wall that borders an upper / lower discharge cell line. The method of claim 8, wherein the partition wall, And a cavity exhaust path on one open side of the upper and lower discharge cell lines. The method of claim 1 or 2, wherein the partition wall, A plasma display panel having an asymmetric structure having different sizes of R (Red), G (Green), and B (Blue) discharge cells. The method of claim 10, wherein the asymmetry, A plasma display panel characterized by having the largest size of a B (Blue) discharge cell. The method of claim 10, wherein the ratio of the different asymmetric structures, R: G: B = 0.9-1: 1: 0.9-1.1, The plasma display panel characterized by the above-mentioned. (a) forming a first electrode, a first dielectric and a protective film on the first substrate; (b) forming a barrier rib having a structure in which a second electrode, a second dielectric, at least one neighboring discharge cell, and a discharge space are connected to each other on a second substrate; And (c) bonding the first substrate and the second substrate to produce a panel. The method of claim 13, wherein the forming of the partition wall in the step (b), Forming a barrier layer on a second dielectric of the second substrate; Patterning the barrier layer as a mask having a structure in which at least one neighboring discharge cell and a discharge space are connected to each other; Developing and firing the patterned partition wall to form a partition wall having a structure in which at least one neighboring discharge cell and a discharge space are connected to each other. The method of claim 13 or 14, wherein the patterning of the partition layer, A method of manufacturing a plasma display panel, characterized by patterning at least one of the upper and lower surfaces of the discharge cell line in an open structure. The method of claim 13 or 14, wherein the patterning of the partition layer, A method of manufacturing a plasma display panel characterized in that the patterning so as to project in the up / down direction. The method of claim 16, wherein the protrusion, A plasma display panel manufacturing method, characterized in that the width is 20㎛ or less. The method of claim 16, wherein the protrusion, A method of manufacturing a plasma display panel, characterized by patterning as a rhombus. The method of claim 16, wherein the protrusion, A plasma display panel manufacturing method comprising patterning into triangles. The method of claim 16, wherein the protrusion, A method of manufacturing a plasma display panel, characterized by patterning in an elliptical shape. The method of claim 13 or 14, wherein the patterning of the partition layer, A method of manufacturing a plasma display panel, characterized by patterning the structure without a line separation partition that is a boundary between an upper and a lower discharge cell line. The method of claim 21, wherein the patterning of the structure without the line separation partition wall, A method of manufacturing a plasma display panel, characterized by patterning a structure having a common exhaust path on one open side of an up / down discharge cell line. The method of claim 13 or 14, wherein the patterning of the partition layer, A method of manufacturing a plasma display panel comprising patterning an asymmetric structure having different sizes of R (Red), G (Green), and B (Blue) discharge cells. The method of claim 23, wherein the asymmetry is, A method of manufacturing a plasma display panel, characterized in that the size of the B (Blue) discharge cell is patterned the largest. The method of claim 23, wherein the ratio of the different asymmetric structures, R: G: B = 0.9-1: 1: The manufacturing method of the plasma display panel characterized by patterning by 0.9-1.1.

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