JPH10294061A - Forming method for ceramic rib with phosphor layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply apply a phosphor layer on both the surface of each ceramic rib by heat treating it repeatedly very few times, and enhance adhesion between each ceramic rib and the phosphor layer. SOLUTION: Phosphor paste is applied to the upper and side surfaces of a plurality of thermal sublimation ribs 32b formed over a glass substrate 31 so as to be dried first. Next, dried phosphor layers 38 over a plurality of the thermal sublimation ribs 32b are removed, and ceramic paste containing glass powder is filled in each space 32a between the plural thermal sublimation ribs 32b and 32b up to a height identical to that of each thermal sublimation rib 32b. Furthermore, the ceramic paste is dried so as to allow a plurality of ceramic green ribs 39 to be formed, a plurality of the ceramic green ribs 39 and the phosphor layers 38 are sintered, and a plurality of the thermal sublimation ribs 32b are thereby sublimated simultaneously.

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 a ceramic rib serving as a cell partition of a light emitting layer of a plasma display panel. More specifically, the present invention relates to a method for forming a ceramic rib having a luminous body layer formed on a surface thereof.

[0002]

2. Description of the Related Art Heretofore, as a method for forming a ceramic rib with a phosphor layer of this kind, there has been disclosed a method capable of easily forming a phosphor screen on the rib (Japanese Patent Laid-Open No. 1-124929). In this method, a photosensitive resist layer is formed by filling a photosensitive resist into a gap between a plurality of ceramic ribs formed on a glass substrate to the same height as the ceramic ribs, and the resist layer is formed with a width adjacent to the ceramic ribs. A narrow gap is formed between the ceramic rib and the photosensitive resist layer by exposing and developing except for a narrow portion, and the gap between the ceramic rib and the photosensitive resist layer is filled with a phosphor paste. The resist is removed.

[0003]

However, in the above-mentioned conventional method, after firing to form the ceramic rib, the phosphor paste is dried in order to bring the phosphor layer into close contact with the ceramic rib, and the dried phosphor is further dried. The body paste needs to be heated or baked, and has a drawback that the number of heat treatments is large and the process is complicated. An object of the present invention is to provide a method for forming a phosphor layer-attached ceramic rib which can easily provide a phosphor layer on both side surfaces of the ceramic rib with a small number of heat treatments and can improve the adhesion between the ceramic rib and the phosphor layer. is there.
Another object of the present invention is a method of forming a ceramic rib with a phosphor layer, which can be accurately formed in a cell shape between a plurality of ceramic ribs.

[0004]

The invention according to claim 1 is
As shown in FIG. 1, after a ceramic green rib 12 having a dried phosphor paste layer 14 on both sides is provided on a glass substrate 11, the ceramic green rib 12 and the phosphor paste layer 14 are simultaneously fired to fluoresce. Body layer 16
This is a method for forming the attached ceramic ribs 17. In the method of forming the ceramic rib with the phosphor layer according to the first aspect, the dried ceramic green rib 12 that becomes the ceramic rib 17 and the dried ceramic green rib 12 that is formed on both sides of the ceramic green rib 12 and becomes the phosphor layer 16. Since the phosphor paste layer 14 is simultaneously fired, the phosphor layer 16 can be easily applied to both side surfaces of the ceramic rib 17 with a small number of heat treatments, and the adhesion between the ceramic rib 17 and the phosphor layer 16 is improved. it can.

As shown in FIG. 2, the invention according to claim 2 comprises a step of applying and drying a phosphor paste on the upper and side surfaces of a plurality of heat-dissipating ribs 32b formed on a glass substrate 31; Removing the dried phosphor paste layer 38 on the upper surface of the heat-dissipating rib 32b, and disposing the heat-dissipating rib 3 in the space 32a between the plurality of heat-dissipating ribs 32b.
2b, filling the ceramic paste containing glass powder to the same height as 2b, drying the ceramic paste to form a plurality of ceramic green ribs 39, and firing the plurality of ceramic green ribs 39 and the phosphor paste layer 38. And simultaneously erasing the plurality of heat-dissipating ribs 32b by this firing.

[0006] Even when the ceramic rib with the phosphor layer is formed by the method described in the second aspect, the both sides of the ceramic rib 34 are subjected to a small number of heat treatments in the same manner as in the formation method described in the first aspect. The phosphor layer 41 can be easily provided, and the adhesion between the ceramic rib 34 and the phosphor layer 41 can be improved. Further, the portion where the heat-dissipating rib 32b disappeared by firing becomes a cell 36 between the plurality of ceramic ribs 34, 34, and the cell 36 has substantially the same shape as the accurately formed heat-dissipating rib 32b. Therefore, the cell 36 can be accurately formed in a desired shape. As shown in FIG. 2, the plurality of heat-dissipating ribs are provided on the surface of the photosensitive resist layer 32 formed on the glass substrate 31 by the pattern mask 33.
Or by performing exposure and development, or by forming a thermosetting resin layer formed on a glass substrate by a thick film printing method so as to have a predetermined gap, and heating the resin layer Preferably, it is formed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a ceramic paste containing glass powder was first overlaid many times on a glass substrate 11 in a predetermined pattern by a thick film printing method. The above glass powder is SiO ₂ , Al
_It is a glass powder mainly containing ₂ O ₃ and PbO, and the viscosity of the ceramic paste is preferably 300 to 800 ps. In addition, the ceramic paste was repeatedly applied at a temperature of 150 to 200 ° C. each time the ceramic paste was applied many times, and this was repeated. Thus, the ceramic green ribs 12 were formed on the glass substrate 11 at predetermined intervals (FIG. 1A). Next, a screen plate 13 is provided with a predetermined gap above the upper surface of the ceramic green rib 12, and a phosphor paste is screen-printed to form a phosphor paste layer 1 on the upper surface and side surfaces of the ceramic green rib 12.
4 was formed (FIG. 1B). The screen plate 13 has a plurality of holes 13a opposed to the ceramic green ribs 12 and slightly larger than the ribs 12 (FIG. 1).
(A)) and the viscosity of the single color phosphor paste is 100
Since the thickness of the phosphor paste is about 1000 ps, the phosphor paste drips from the periphery of the upper surface of the rib 12 to the side surface of the rib 12, and is applied substantially uniformly to the upper surface and the side surface of the rib 12.

After the phosphor paste layer 14 is dried,
The dried phosphor paste layer 14 on the upper surface of the rib 12 was removed with a squeegee (FIG. 1C). Furthermore, the ceramic green rib 12 and the phosphor paste layer 14 are
Simultaneous firing at a temperature of ° C. resulted in a ceramic rib 17 having a phosphor layer 16 formed on the side surface (FIG. 1D). Thus, the phosphor layer 16 could be easily applied to both side surfaces of the ceramic rib 17 with a small number of heat treatments. In addition, since the ceramic green ribs 12 and the phosphor paste layer 14 were simultaneously fired, the adhesion between the ceramic ribs 17 and the phosphor layer 16 could be improved.

FIG. 2 shows a second embodiment of the present invention.
In this embodiment, a photosensitive resist layer 32 is first formed by laminating a photosensitive dry film to a predetermined thickness on a glass substrate 31 (FIG. 2A), and the surface of the photosensitive resist layer 32 is formed. Was covered with a pattern mask 33 and exposed and developed (FIGS. 2B and 2C). As a result, the resist layer 32 becomes
A plurality of spaces 32a formed by removing portions that become 4
And a plurality of heat-dissipating ribs 32 remaining in a portion that will later become a cell 36 between the ceramic ribs 34 and the ceramic ribs 34.
b (FIG. 2 (c)). Next, a screen plate 37 is installed with a predetermined gap above the upper surface of the heat-dissipating rib 32b (FIG. 2D), and a phosphor paste of a single color is screen-printed to perform an upper surface of the heat-dissipating rib 32b. 2 and a phosphor paste layer 38 was formed on the side surface (FIG. 2).
(E)). The screen plate 37 is provided with each heat-dissipating rib 32.
b and a plurality of holes 37a slightly larger than the ribs 32b (FIG. 2D), and the viscosity of the phosphor paste is 100 to 1000 ps. 32b from the upper edge of the upper surface
b, it was dripped on the side surface, and was applied substantially uniformly on the upper surface and the side surface of the rib 32b.

After the phosphor paste layer 38 is dried,
The dried phosphor paste layer 38 on the upper surface of the heat-dissipating rib 32b was removed with a squeegee (FIG. 2 (f)). Next, a space 32a between the plurality of heat-dissipating ribs 32b, 32b is filled with a ceramic paste containing glass powder up to the same height as the heat-dissipating ribs 32b.
By drying at 200 ° C., a ceramic green rib 39 was formed (FIG. 2G). The glass powder is a glass powder containing SiO ₂ , Al ₂ O ₃ , and PbO as main components as in the first embodiment, and the viscosity of the ceramic paste is 300.
It is preferably ~ 800 ps. The surface of the filled ceramic paste was smoothed with a squeegee (not shown). Further, the ceramic green rib 39 and the phosphor paste layer 38 were fired at 500 to 600 ° C., and the heat-dissipating ribs 32b were simultaneously eliminated by this firing to obtain the ceramic ribs 34 having the phosphor layers 41 formed on the side surfaces. (Figure 2
(H)).

As described above, the phosphor layer 41 can be easily applied to both side surfaces of the ceramic rib 34 with a small number of heat treatments.
Since the ceramic green rib 39 and the dried phosphor paste layer 38 are simultaneously fired, the ceramic rib 3
4 and the phosphor layer 41 can be improved in adhesion. Further, the portion where the heat-dissipating ribs 32b disappeared by the above-mentioned firing becomes the cells 36. Since the cells 36 have substantially the same shape as the accurately formed heat-dissipating ribs 32b, the cells 36 have the desired shape. Can be formed accurately. In this embodiment, the heat-dissipating rib is formed by exposing and developing the photosensitive resist layer formed on the glass substrate, but the thermosetting resin layer has a predetermined gap on the glass substrate. After being formed by the thick film printing method, the resin layer may be heated to form the heat-dissipating ribs.

FIG. 3 shows a third embodiment of the present invention.
3, the same reference numerals as those in FIG. 2 indicate the same parts. In this embodiment, a method for forming a ceramic rib with a phosphor layer for a plasma display which can emit light in a natural color will be described. First, similarly to the second embodiment, the plurality of heat-dissipating ribs 32b cover the surface of the photosensitive resist layer 32 formed on the glass substrate 31 with a pattern mask (not shown) to perform exposure and development. The first screen plate 51 was set above the upper surfaces of the heat-dissipating ribs 32b with a predetermined gap therebetween (FIG. 3A). A plurality of spaces 32a to be ceramic ribs are formed between the plurality of heat-dissipating ribs 32b, and the spaces 32a are formed at every third first space 32c and at the right of the first space 32c. And a third space 32e formed on the left of the first space 32c.

The first screen plate 51 has a plurality of first holes 5.
1a are formed, and these first holes 51a are formed in the first space 32.
The heat-dissipating rib 32b forming c is formed above the opposing side surface. A red phosphor paste having a viscosity of 100 to 1000 ps is screen-printed from the upper surface of the first screen plate 51, and the opposing side surfaces of the heat-dissipating ribs 32b forming the first space 32c and the heat connected to these opposing side surfaces are formed. A red phosphor paste layer 58a was formed on each half of the upper surface of the vanishing rib 32b (FIG. 3A).

Next, the first screen plate 51 is removed, and the second screen plate 5 is placed at the same position as the first screen plate 51.
2 was installed. A plurality of second holes 52a are formed in the second screen plate 52, and the second holes 52a are formed above opposing side surfaces of the heat-dissipating ribs 32b that form the second spaces 32d. A green phosphor paste having a viscosity of 100 to 1000 ps is screen-printed from the upper surface of the second screen plate 52, and the opposing side surfaces of the heat-dissipating ribs 32b forming the second space 32d and the heat connected to these opposing side surfaces are formed. A green phosphor paste layer 58b was formed on each half of the upper surface of the disappearing rib 32b (FIG. 3B).

Next, the second screen plate 52 is removed, and the third screen plate 53 is placed at the same position as the second screen plate 52.
Was installed. The third screen plate 53 includes a plurality of third screens.
Holes 53a are formed, and these third holes 53a are formed above opposing side surfaces of the heat-dissipating ribs 32b that form the third spaces 32e. A blue phosphor paste having a viscosity of 100 to 1000 ps is screen-printed from the upper surface of the third screen plate 53, and the opposite side surfaces of the heat-dissipating ribs 32b forming the third space 32e and the heat connected to these opposite side surfaces are formed. A blue phosphor paste layer 58c was formed on each half of the upper surface of the disappearing rib 32b (FIG. 3C).

The phosphor paste layers 58a, 58b, 5
8c was dried, and the dried phosphor paste layers 58a, 58b, 58c on the upper surface of the heat-dissipating rib 32b were removed with a squeegee. Thereafter, in the same process as in the second embodiment, a ceramic rib having a red phosphor layer, a green phosphor layer, and a blue phosphor layer, which are the three primary colors of light, formed on the side surfaces was obtained. When this ceramic rib is used for a plasma display panel, natural colors can be emitted.

In this embodiment, a plurality of heat-dissipating ribs are exposed and patterned by covering the surface of a photosensitive resist layer formed on a glass substrate with a pattern mask in the same manner as in the second embodiment. The red, green, and blue phosphor paste layers were formed on these heat-dissipating ribs by performing development, and a plurality of heat-dissipating ribs were formed on the glass substrate in the same manner as in the first embodiment. A ceramic paste containing glass powder is aligned in a predetermined pattern by a thick-film printing method, and the paste is dried and coated a number of times each time one application is performed, thereby forming a plurality of ceramic green ribs. Red, green, and blue phosphor paste layers may be formed on these ceramic green ribs.
Further, a plurality of heat-dissipating ribs are formed by forming a thermosetting resin layer on a glass substrate by a thick film printing method so as to have a predetermined gap, and then heating the resin layer to form a heat-dissipating rib. Red, green, and blue phosphor paste layers may be formed on the conductive ribs.

[0018]

As described above, according to the present invention, after a ceramic green rib having a dried phosphor paste layer on both sides is provided on a glass substrate, the ceramic green rib and the phosphor paste layer are removed. Since the fired ceramic ribs with the phosphor layer were formed at the same time, the dried ceramic green ribs serving as the ceramic ribs and the dried phosphor paste layer serving as the phosphor layers were simultaneously fired. Phosphor layers can be easily provided on both side surfaces of the rib, and the adhesion between the ceramic rib and the phosphor layer can be improved.

After the phosphor paste is applied to the upper and side surfaces of the heat-dissipating rib formed on the glass substrate and dried, the dried phosphor paste layer on the upper surface of the heat-dissipating rib is removed. The space between the ribs is filled with a ceramic paste containing glass powder to the same height as the heat-dissipating ribs, dried to form ceramic green ribs, and the ceramic green ribs and the phosphor paste layer are simultaneously fired, and the fired heat is applied. If the elimination ribs are eliminated, the phosphor layers can be easily applied to both side surfaces of the ceramic ribs with a small number of heat treatments, and the adhesion between the ceramic ribs and the phosphor layer can be improved, similarly to the above-described forming method. . Further, since the portions having the heat-dissipating ribs lost by the firing become cells between the plurality of ceramic ribs, the cells can be accurately formed in a desired shape.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the formation of a ceramic rib according to a first embodiment of the present invention in the order of steps.

FIG. 2 is a sectional view showing the formation of a ceramic rib according to a second embodiment of the present invention in the order of steps.

FIG. 3 is a sectional view showing a step performed between FIG. 2D and FIG. 2E in a step of forming a ceramic rib according to a third embodiment of the present invention.

[Explanation of symbols]

11, 31 Glass substrate 12, 39 Ceramic green rib 14, 38, 58a, 58b, 58c Phosphor paste layer 16, 41 Phosphor layer 17, 34 Ceramic rib 32 Photosensitive resist layer 32a Space to be ceramic rib 32b Heat dissipation Rib 33 pattern mask

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Makoto Torikai 1-297 Kitabukuro-cho, Omiya-shi, Saitama Mitsubishi Materials Research Institute (72) Inventor Yuji Ota 1-297 Kitabukuro-cho, Omiya-shi, Saitama Mitsubishi Materials (72) Inventor Hideaki Sakurai 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Mitsubishi Materials Corporation (72) Inventor Akira Nishihara 1-297 Kitabukurocho, Omiya City, Saitama Mitsubishi Materials Corporation Inside the company research institute

Claims (4)

[Claims] 1. A dried phosphor paste layer on both sides.
After providing a ceramic green rib (12) having 58a, 58b, 58c) on a glass substrate (11), the ceramic green rib (12) and the phosphor paste layer (14, 58a, 58b, 58c) are simultaneously fired. Forming a ceramic rib with a phosphor layer. 2. A step of applying and drying a phosphor paste on upper and side surfaces of a plurality of heat-dissipating ribs (32b) formed on a glass substrate (31); Removing the dried phosphor paste layer (38, 58a, 58b, 58c) on the upper surface of the heat-dissipating ribs (32b) in the space between the plurality of heat-dissipating ribs (32b, 32b). Filling a ceramic paste containing glass powder to a height, drying the ceramic paste to form a plurality of ceramic green ribs (39), and the plurality of ceramic green ribs (39) and a phosphor paste layer ( 38, 58a, 58b, 58c), and simultaneously firing the plurality of heat-dissipating ribs (32b). 3. A plurality of heat-dissipating ribs (32b) are attached to a glass substrate.
3. The method for forming a ceramic rib with a phosphor layer according to claim 2, wherein the surface is formed by exposing and developing the surface of the photosensitive resist layer formed on the photosensitive resist layer with a pattern mask. 4. A plurality of heat-dissipating ribs are formed by forming a thermosetting resin layer formed on a glass substrate by a thick-film printing method so as to have a predetermined gap, and heating the resin layer. The method for forming a ceramic rib with a phosphor layer according to claim 2.