KR100947955B1 - Method for Forming Pattern of Plasma Display Panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter referred to as "PDP"), and more particularly, in order to reduce process number and material cost loss, a black electrode paste is coated on the entire surface including a transparent electrode, After forming the metal electrode paste in a slightly wider width than the pattern size, the metal electrode and the black stripe are formed at the same time through the photosensitive process, thereby reducing the material loss, the number of processes and the process cost by the conventional photosensitive process. It relates to a method of forming a pattern of a PDP substrate that brings about.

Description

Pattern forming method of plasma display panel substrate {Method for Forming Pattern of Plasma Display Panel}

1 is a cross-sectional view of a front substrate of a typical plasma display panel.

2A to 2G are manufacturing process diagrams of a front substrate of a conventional plasma display panel.

3A to 3D are manufacturing process diagrams of the front substrate of the plasma display panel of the present invention.

4A to 4D are manufacturing process diagrams of the front substrate of the plasma display panel of the present invention.

<Brief description of the main parts of the drawing>

1, 20, 30, 40: front substrate 2, 22, 31, 41: transparent electrode

3, 23-1, 32-1, 42-1: black electrode

4, 24-1, 33-1, 44-1: metal electrode

5, 26-1, 35, 43-1: Black stripe 6: Dielectric layer

23: black electrode paste 24: metal electrode paste

25: Photomask for Metal Electrode Pattern

26: black stripe paste                 

27 mask for black stripe pattern 32 paste for black electrode

33, 44: paste pattern for metal electrode 34, 45: exposure mask

42, 43: black electrode paste pattern

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter referred to as "PDP"), and more particularly, in order to reduce process number and material cost loss, a black electrode paste is provided on a front surface including a transparent electrode. After coating, forming a metal electrode paste slightly wider than the size of the pattern, and then forming a metal electrode and a black stripe at the same time through the photosensitive process, the loss of material and the number of processes and the process cost by the conventional photosensitive process The present invention relates to a method of forming a pattern of a PDP substrate, which brings about a reduction effect.

The PDP is composed of an array of discharge cells capable of independently discharging, and is a flat panel display capable of reproducing a predetermined image by discharging each discharge cell independently according to an electrical signal applied from the outside. . The PDP has the advantages of securing a large screen, ultra-thin, high-definition and wide viewing angle, and simple manufacturing process, and excellent fineness.

The PDP has a pattern in which the front substrate 1 on which the image is displayed and the rear substrate are formed in parallel at a predetermined distance, and the front substrate is indium tin on the front substrate 1 as shown in FIG. 1. a transparent electrode 2 formed of an oxide material, and a plurality of electrodes and a dielectric layer 6 having a metal electrode 4 made of a metal material such as silver (Ag) arranged on the transparent electrode. .

In this case, since the silver for the metal electrode 4 has a low transmittance with respect to light, external light is reflected and low contrast is obtained. Therefore, the black electrode is disposed between the transparent electrode 2 and the metal electrode 4. (3) is formed and solved.

In addition, a black stripe 5 is formed between each transparent electrode 2 in order to absorb external light generated from the front substrate and the outside to reduce reflection and to improve contrast.

In general, in order to manufacture the metal electrode of the front substrate of the PDP (a) a pattern printing the metal electrode paste at least once with a screen mask, and after performing a drying process, printing and drying the black stripe pattern between the structures Method and (b) front printing / drying the photosensitive black electrode with a screen mask, then front printing / drying of the silver electrode on the upper part of the structure, forming a metal electrode through exposure, developing and firing process, and then printing / The drying method has been disclosed (Korean Patent Publication Nos. 2003-13783, 2003-38866 and Republic of Korea Patent Publication No. 2002-329046).

However, in the method (a), since the pattern formed in the printing process is the final pattern, the material cost is excellent, but the high resolution is obtained because the linearity of the pattern, the degree of fine pattern formation and the alignment accuracy of the transparent electrode are low. It is difficult to obtain and has a disadvantage of additionally performing a black stripe forming process.

In addition, in the method (b), since the black electrode and the silver electrode are printed, dried, and exposed on the entire surface of the substrate, the metal electrode is formed by simultaneous development / firing, and then the black stripe patterning process is performed. The loss is large.

2A to 2G illustrate a method of forming a metal electrode and a black stripe of a typical PDP.

Referring to FIG. 2A, the transparent electrode 22 is formed on the front substrate 20, and then the black electrode paste 23 is coated on the front surface 22 including the transparent electrode.

The metal electrode paste 24 is sequentially applied to the black electrode paste 23 formed according to FIG. 2A as shown in FIG. 2B.

The upper portion of the metal electrode paste 24 formed according to FIG. 2B is exposed to ultraviolet rays using the photomask 25 for metal electrode patterns as shown in FIG. 2C.

The development and firing process is performed on the exposed product according to FIG. 2C to form the black electrode 23-1 and the metal electrode 24-1 as shown in FIG. 2D.

Thereafter, the black stripe paste 26 is applied to the entire surface of the metal electrode formed according to FIG. 2D as shown in FIG. 2E.

When the exposure and development processes are performed using the black stripe pattern photomask 27 as shown in FIG. 2F, the black stripes 26-1 as shown in FIG. 2G are formed.

However, as described above, after printing the lower black electrode paste and the upper metal electrode paste on the entire surface, the metal electrode and the black electrode are formed, and the black stripe paste is applied on the entire surface, and then the black In the process of forming the stripe, a material cost loss is large because 80% or more of the paste except for the actual pattern is removed. In addition, since the process for forming the black stripe has to be performed again, there is a disadvantage that the process step is complicated.

In the present invention, in order to overcome the above problems, it is an object of the present invention to provide a pattern forming method for forming a metal electrode and a black stripe at the same time, reducing the number of manufacturing process and material costs.

In order to achieve the above object, the pattern formation method of the present invention

A front substrate manufacturing process of a PDP, comprising: forming a transparent electrode on a portion of a front substrate; Forming a black electrode and a black stripe common paste on the front surface of the front substrate including the transparent electrode; Forming a primary pattern of a paste for a metal electrode on a portion of the black electrode and the black stripe common paste so as to be on a portion of the transparent electrode; Exposing the primary pattern of the metal electrode paste, the black electrode and the black stripe common paste using an exposure mask; And developing the first pattern of the exposed metal electrode paste, the black electrode and the black stripe common paste to form a black electrode and a metal electrode of a laminated structure on a portion of the transparent electrode, and simultaneously Forming a black stripe on the portion.

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In addition, another PDP substrate pattern forming method according to the present invention                     

A front substrate manufacturing process of a PDP, comprising: forming a transparent electrode on a portion of a front substrate;
A first pattern of a black electrode and a black stripe common paste is formed on the black electrode forming portion on the transparent electrode, and a first pattern of a black electrode and a black stripe common paste is formed on the black stripe forming portion on the front substrate between the transparent electrodes. Making;
Forming a primary pattern of a metal electrode paste on a portion of the primary pattern of the black electrode and the black stripe common paste formed on the black electrode forming portion on the transparent electrode;
Exposing a primary pattern of the metal electrode paste and a primary pattern of a black electrode and a black stripe common paste using an exposure mask; And
The first pattern of the exposed metal electrode paste and the first pattern of the black electrode and the black stripe common paste are developed to form a black electrode and a metal electrode having a laminated structure on the transparent electrode, and at the same time, a front substrate between the transparent electrodes. Forming a black stripe on the substrate.

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Hereinafter, an embodiment of a method of forming a pattern of a PDP panel substrate according to the present invention will be described with reference to FIGS. 3A to 3D.

Referring to FIG. 3A, a transparent electrode 31 is formed on a portion of the front substrate 30. Then, the black electrode and the black stripe common paste 32 are coated on the entire surface of the front substrate 30 including the transparent electrode 31.

A portion of the black electrode and the black stripe common paste 32 formed in accordance with FIG. 3A, for example, the portion of the metal electrode 33-1 shown in FIG. 3D is to be formed, as shown in FIG. 3B. To form a primary pattern.

In this case, the primary pattern of the metal electrode paste 33 controls the alignment of the electrodes when forming the electrodes and controls the formation of the structure, as shown in FIG. 3D, after the final development. It is preferable to form 1 to 10 times wider than the line width of 1).

The metal electrode paste 33 preferably uses silver (Ag).

The primary pattern of the metal electrode paste 33 formed according to FIG. 3B and the exposed black electrode and black stripe common paste 32 are exposed to ultraviolet rays using the exposure mask 34 as shown in FIG. 3C. Perform the exposure process.

In this case, the exposure mask 34 preferably has a pattern for simultaneously forming the metal electrode 33-1 and the black stripe 35 as shown in FIG. 3D. The reason why the exposure mask 34 has a pattern for forming the metal electrode 33-1 is that the primary pattern of the metal electrode paste 33 formed in the step of FIG. 3B is aligned with the electrode when forming the electrode. In order to control the structure and control the formation of the structure, as shown in FIG. 3D, the width of the metal electrode 33-1 to be formed after the final development is about 1 to 10 times wider.

3C, the first pattern of the metal electrode paste 33, the black electrode and the black stripe common paste 32 are developed and baked, and thus the transparent electrode 31 is exposed as shown in FIG. 3D. A black electrode 32-1 and a metal electrode 33-1 having a stacked structure are formed on a portion of the structure, and a black stripe 35 is formed on a portion of the front substrate 30 between the transparent electrodes 31 at the same time. .

In addition, another method of simultaneously forming the metal electrode and the black stripe of the present invention will be described with reference to FIGS. 4A to 4D.

Referring to FIG. 4A, a transparent electrode 41 is formed on a portion of the front substrate 40. Subsequently, a primary pattern 42 of a black electrode and a black stripe common paste is formed on a portion of the transparent electrode 41, for example, a portion where the black electrode is to be formed, and at the same time, the front substrate 40 between the transparent electrodes 41 is formed. The primary pattern 43 of the black electrode and the black stripe common paste is formed on a portion, for example, the portion where the black stripe is to be formed.

On the primary pattern 42 of the black electrode and the black stripe common paste formed in accordance with FIG. 4A, the primary pattern 44 of the metal electrode paste is formed as shown in FIG. 4B.

At this time, the first pattern 42 of the black electrode and the black stripe common paste precisely controls the alignment of the electrode when forming the electrode, and the black to be formed after the final development as shown in FIG. 4D to control the formation of the structure. It is preferable to form about 1 to 10 times wider than the line width of the electrode 42-1 and the black stripe 43-1.

As shown in FIG. 4D, the first pattern 44 of the metal electrode paste may be formed to be about 1 to 10 times wider than the line width of the metal electrode 44-1 to be formed after the final development.

According to FIG. 4B, the primary pattern 44 of the metal electrode paste sequentially formed on the display surface, the primary pattern 42 of the black electrode and the black stripe common paste, and the primary pattern 43 of the black electrode and the black stripe common paste ), An exposure process is performed with an exposure mask 45 using ultraviolet rays.

In this case, the exposure mask 45 preferably has a pattern capable of simultaneously forming the metal electrode 44-1 and the black stripe 43-1 as shown in FIG. 4D. The reason why the exposure mask 45 has a pattern for forming the metal electrode 44-1 is that the primary pattern 44 of the metal electrode paste formed in the step of FIG. 4B is final as shown in FIG. 4D. This is because it is formed to be about 1 to 10 times wider than the line width of the metal electrode 44-1 to be formed after development.

Subsequently, the results exposed in FIG. 4C, that is, the primary pattern 44 of the metal electrode paste, the primary pattern 43 of the black electrode and the black stripe paste, and the primary of the black electrode and the black stripe paste The pattern 42 is developed and baked to form a black electrode 42-1 and a metal electrode 44-1 having a stacked structure on a portion of the transparent electrode 41 as shown in FIG. 4D. The black stripe 43-1 is formed on the front substrate 40 of the non-discharge area between the portions 41).

As described above, in the present invention, the black electrode and the black stripe common paste are coated on the entire surface of the front substrate including the transparent electrode, and the first pattern of the metal electrode paste is formed to be slightly wider than the pattern size of the metal electrode. After that, by forming the metal electrode and the black stripe at the same time through the photosensitive process, it is possible to bring about the material loss and the number of processes and the process cost reduction by the existing process.

In addition, since the black electrode and the black stripe can be formed at the same time using the paste for the black electrode, it is not necessary to perform a separate black stripe forming process, thereby preventing the consumption of mask manufacturing costs such as a screen mask and a photo mask. This can simplify the process and reduce the production cost of equipment operation.

Claims (7)

In the front substrate manufacturing process of the plasma display panel, Forming a transparent electrode on a portion of the front substrate; Forming a black electrode and a black stripe common paste on the front surface of the front substrate including the transparent electrode; Forming a primary pattern of a paste for a metal electrode on a portion of the black electrode and the black stripe common paste so as to be on a portion of the transparent electrode; Exposing the primary pattern of the metal electrode paste, the black electrode and the black stripe common paste using an exposure mask; And The first pattern of the exposed metal electrode paste, the black electrode and the black stripe common paste are developed to form a black electrode and a metal electrode having a laminated structure on a portion of the transparent electrode, and at the same time a portion of the front substrate between the transparent electrodes. And forming a black stripe on the plasma display panel substrate. The method of claim 1, The pattern forming method of the plasma display panel substrate, characterized in that the primary pattern of the metal electrode paste is formed 1 to 10 times wider than the line width of the metal electrode. The method of claim 1, And the exposure mask has a pattern for simultaneously forming the metal electrode and the black stripe. In the front substrate manufacturing process of the plasma display panel, Forming a transparent electrode on a portion of the front substrate; A first pattern of a black electrode and a black stripe common paste is formed on the black electrode forming portion on the transparent electrode, and a first pattern of a black electrode and a black stripe common paste is formed on the black stripe forming portion on the front substrate between the transparent electrodes. Doing; Forming a primary pattern of a metal electrode paste on a portion of the primary pattern of the black electrode and the black stripe common paste formed on the black electrode forming portion on the transparent electrode; Exposing a primary pattern of the metal electrode paste and a primary pattern of a black electrode and a black stripe common paste using an exposure mask; And The first pattern of the exposed metal electrode paste and the first pattern of the black electrode and the black stripe common paste are developed to form a black electrode and a metal electrode having a laminated structure on the transparent electrode, and at the same time, a front substrate between the transparent electrodes. And forming a black stripe on the plasma display panel substrate. The method of claim 4, wherein And the first pattern of the black electrode and the black stripe common paste is formed 1 to 10 times wider than the line width of the black electrode and the black stripe. The method of claim 4, wherein The pattern forming method of the plasma display panel substrate, characterized in that the primary pattern of the metal electrode paste is formed 1 to 10 times wider than the line width of the metal electrode. The method of claim 4, wherein And the exposure mask has a pattern for simultaneously forming the metal electrode and the black stripe.

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