KR20060058430A - Forming method of barrier lib in plasma display panel - Google Patents

Abstract

The partition wall forming method of the plasma display panel according to the present invention comprises the steps of: preparing a soft mold having a plurality of intaglio shapes, and a PDP lower plate on which address electrodes and dielectric layers are formed; Coating a curable paste for partition walls between the soft mold and the PDP lower plate provided with the address electrode and the dielectric layer; Inserting the barrier curable paste into the plurality of intaglio shapes provided in the soft mold; Curing the barrier curable paste; The soft mold is released, characterized in that it comprises a step of forming a partition on the PDP lower plate.

According to the present invention, the process for manufacturing the PDP partition wall is simplified, the process time and cost can be reduced, and by forming the partition wall through simple soft mold production, it is easy to apply to high resolution and large screens. There is an advantage.

Description

Forming method of barrier lib in plasma display panel

1 is a cross-sectional view of a plasma display panel in a multi-layered format.

Figures 2a to 2e is a cross-sectional view showing a soft mold manufacturing process according to the present invention used in forming a PDP partition wall.

3A to 3D are cross-sectional views illustrating a process of forming a partition wall of a PDP through a soft mold manufactured through FIG. 2.

4 is a view schematically showing an apparatus used in the manufacturing process of PDP partition wall formation according to the present invention.

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

260: soft mold 300: PDP lower plate

380: bulkhead

The present invention relates to a method for forming a partition wall of a plasma display panel, and more particularly, to a method for forming a partition wall of a plasma display panel using an intaglio soft mold corresponding to the partition shape.

Recently, the field of display and circuit materials has been rapidly growing, and devices have been developed that require larger and more integrated substrates.

Among them, Plasma Display Panel (PDP) is the most popular among the flat panel displays such as LCD (Liquid Crystal Display), FED (Field Emission Display) and ELD (Electro Luminescence Display). As a display device having suitable advantages, active technology development is required.

1 is a cross-sectional view of a plasma display panel in a multilayer structure format.

As shown in FIG. 1, the plasma display panel (hereinafter referred to as PDP) is formed by coating several films on the two flat glass substrates forming the top panel 10 and the bottom panel 20, and then bonding them together. Device.

More specifically, after the auxiliary electrode 12 and the transparent electrode 13 are provided below the first flat glass substrate 11, the dielectric layer 14 is formed, and indium tin oxide (Indiun-Tin Oxide) below : A protective film 15 made of ITO is formed to complete the top panel 10, the address electrode 22 is provided on the second flat glass substrate 21, and a dielectric layer 23 is formed. After the partition wall 24 is formed to distinguish the surface of the dielectric layer 23 and the fluorescent material 25 around the partition wall 24, the lower panel 20 is completed, and then the upper panel 10 and the lower surface are completed. By attaching the panel 20 with a small gap, the production of the PDP is completed. Of course, a discharge gas that is an inert gas must be inserted between the upper panel 10 and the lower panel 20.                         

In this case, the phosphor 25 is excited by ultraviolet rays during the discharge of each cell to emit visible light so that the user can see the image.

That is, the PDP is an element for displaying an image by using a plasma generated during gas discharge, filling the discharge gas of Ne, Xe, etc. between the upper plate and the lower plate of the glass material, the ultraviolet rays generated through the gas discharge is red, It excites green and blue phosphors to generate visible light.

In the structure of the lower plate of the conventional PDP, the upper plate and the lower plate form a sealed structure filled with discharge gas. In this case, a partition wall 24 for forming discharge space of discharge gas is formed on the lower plate as described above.

At this time, since the partition wall 24 performs an important function of partitioning the discharge space to block electrical and optical cross-talk between them, a very careful process is required to form the partition wall.

Conventional methods include a screen printing method, a sand blasting method, a photosensitive glass method, etc. as a method of manufacturing a partition on the PDP lower plate.

In the screen printing method, a barrier rib-forming paste is printed on a glass substrate using a screen on which a barrier rib pattern is formed, and then dried and then repeatedly printed and dried to form a barrier rib having a desired width and height. However, when the screen printing method is used, the process is very complicated since 5-10 times or more repetitive printing is required to form a partition wall having a desired height, and a very accurate alignment is required for forming the partition wall.                         

On the other hand, the sand blasting method is a forming method widely applied in recent years by applying a barrier forming paste, which is a partition material on the lower plate to a certain thickness and drying, and then covering the protective film formed in the desired partition shape on the bottom plate or abrasion-resistant sand By inserting a certain size of sand particles at a high pressure while the blast mask is inserted, the partition material is removed to obtain a partition of a desired shape.

However, when the sand blasting method is used, since the loss of the partition forming paste is very large, the production cost is increased and the partition is damaged by the physical force by the sand particles. In addition, there is a possibility of environmental pollution due to the waste paste and sand particles generated during the partition formation process, there is a problem that the additional cost for its treatment is increased.

The present invention provides a method for forming a partition wall of a plasma display panel that can simplify a process, reduce production cost, and improve productivity by forming a partition wall using an intaglio soft mold and a curable resin material corresponding to a partition shape formed on a PDP lower plate. The purpose is to provide.

In order to achieve the above object, a method of forming a partition wall of a plasma display panel according to the present invention includes the steps of preparing a soft mold having a plurality of intaglio shapes, a PDP lower plate having an address electrode and a dielectric layer; Coating a curable paste for partition walls between the soft mold and the PDP lower plate including the address electrode and the dielectric layer; Inserting the barrier curable paste into the plurality of intaglio shapes provided in the soft mold; Curing the barrier curable paste; The soft mold is released, characterized in that it comprises a step of forming a partition on the PDP lower plate.

In addition, when the soft mold is released to form a partition wall, a predetermined process for the partition wall is additionally performed.

Here, the partition curable paste may be a thermosetting resin, a photocurable resin, an ultraviolet curable resin, and when the partition curable paste is an ultraviolet curable resin, it is an oligomer of a soft segment and a soft or hard segment. And a binder, a plasticizer, and a solvent, wherein the compound is one or more materials selected from the group consisting of.

In addition, the intaglio formed in a number of the soft mold is characterized in that it is formed in a pattern of various shapes such as a stripe shape or an ellipse shape.

In addition, the soft mold is a step of applying a photoresist of a predetermined thickness on a transparent substrate; Laminating a photo mask on a predetermined position of the photoresist and then performing an exposure and development process; Forming a primitive mold having the same shape as the partition wall to be formed on the lower surface of the PDP through the exposure and development processes; Applying a predetermined UV curable resin to the transparent support made of the raw mold and the transparent material to closely contact each other, and irradiating ultraviolet (UV) through an upper portion of the transparent support; Curing the ultraviolet curable resin by irradiation of ultraviolet rays and then releasing it in the raw mold; The soft mold having a plurality of intaglios corresponding to the partition shape to be provided in the lower surface of the PDP is formed through the mold release from the raw models.

Here, the components of the UV curable resin has a soft or hard segment (soft or hard segment), has a viscosity of 200 ~ 2,000 cps at room temperature, polyester (polyester), urethane (urethane), epoxy It comprises an oligomer or monomer having an epoxy, silicone and acrylate functional group.

In addition, the material of the transparent support is characterized in that the polycarbonate (polycarbonate), polyethersulfone (polyethersufone), polyetherimide (polyetherimide), it is selected from polyester (polyester).

In addition, the thickness of the photoresist is characterized in that formed at least the same or larger than the height of the partition wall of the PDP lower plate to be actually formed.

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

2A to 2E are cross-sectional views illustrating a soft mold manufacturing process according to the present invention used in forming a PDP partition wall.

First, FIGS. 2A to 2C illustrate a process of forming a primitive mold having the same shape as a PDP barrier rib, and an intaglio soft mold corresponding to a barrier rib actually formed using the primitive mold is manufactured. This is illustrated by FIG. 2E.                     

As shown in FIG. 2A, first, a photoresist 110 having a predetermined thickness is coated on a transparent substrate 100 such as a glass substrate.

At this time, the thickness of the photoresist 110 should be formed at least equal to or greater than the height of the PDP partition wall to be actually formed.

2B, the photomask 120 is laminated on a predetermined position of the photoresist 110, followed by an exposure and development process.

Here, when the photoresist 110 is a positive type, the photo mask is positioned on a region where the photoresist is to be removed. When the exposure and development processes are performed, the photoresist is exposed as shown in FIG. 2C. Only the part is cured, and the area not exposed by the photo mask 120 is removed.

That is, the raw mold 200 having the same shape as the partition wall of the PDP is formed through the process of FIG. 2C.

This primitive mold has the effect of smoothing its surface to favor release properties with the soft mold to be formed later.

Subsequently, a predetermined UV curable resin 240 is coated between the raw mold 200 and the transparent support 220 made of a transparent material through the process up to FIG. 2C, which is illustrated in FIG. 2D. In addition, after the predetermined UV curable resin 240 is applied and brought into close contact, ultraviolet rays (UV) are irradiated with an appropriate amount through the upper portion of the transparent support.

At this time, the predetermined UV curable resin 24 according to the present invention has good releasability with the primitive mold 200 and has good adhesiveness with the transparent support 220. In addition, the viscosity is low, and the primitive mold has excellent wettability.

The predetermined UV curable resin 240 has a soft or hard main chain (soft or hard segment), has a viscosity of 200 ~ 2,000 cps at room temperature, and also has a polyester (polyester), urethane (urethane), It is characterized by including an oligomer or monomer (epoxy) having a epoxy (silicone) and acrylic (acrylate) functional group (monomer).

In addition, the material of the transparent support 220 is selected from polycarbonate, polyethersufone, polyetherimide, polyester, and the like, which is a deformation against heat or an external force at room temperature. It is preferable to have the characteristic that there is not much deformation | transformation by.

In addition, if the transparent support 220 of the material is not used, the mold may be deformed by an external force, which may cause a problem later in alignment with the addressing electrode provided on the lower plate.

Finally, as shown in FIG. 2E, when the ultraviolet curable resin is cured by irradiation of ultraviolet rays and then released from the primitive mold, the shape of the primitive mold is UV cured provided on the transparent support 220. Transferring to the resin 250 results in the production of the soft mold 26 for forming the PDP partition wall according to the present invention.

Here, the intaglio 270 formed in the soft mold 260 is not shown in the cross-sectional view, but may be formed in a pattern of various shapes such as a stripe shape or an ellipse shape.

Hereinafter, a method of forming a PDP partition wall using the soft mold will be described with reference to FIG. 3.

3A to 3D are cross-sectional views illustrating a process of forming a barrier rib of a PDP through a soft mold manufactured through FIG. 2.

First, as shown in FIG. 3A, the lower plate 300 of the PDP on which the soft mold 260 described above, the address electrode 310, and the dielectric layer 320 are formed is prepared.

At this time, the soft mold 260 is in the shape of the intaglio 270 to correspond to the partition wall to be formed on the lower plate 300, the intaglio 270 formed in a number of the soft mold is not shown in the cross section shown However, it may be formed in a pattern of various shapes such as a stripe shape or an ellipse shape.

That is, the soft mold 260 is provided with the intaglio 270 having a shape corresponding to the pattern of the partition wall to be formed on the PDP lower plate 300.

Next, referring to FIG. 3B, a barrier rib curable paste 340 is coated between the soft mold 260 and the PDP lower plate 300 provided with the address electrode 310 and the dielectric layer 320. The barrier rib curable paste 340 is inserted into the plurality of intaglio shapes of the soft mold by pressing the soft mold 260.

Here, the partition curable paste 340 may be a thermosetting resin, a photocurable resin, an ultraviolet curable resin, or the like. Hereinafter, an ultraviolet curable resin will be described as an example.

That is, when the barrier rib curable paste 340 is inserted into the intaglio shape of the soft mold 260 as described above, as shown in FIG. 3C, the barrier rib curable through a predetermined ultraviolet light exposure apparatus (not shown). The paste is cured.

At this time, the components of the curable paste for partition walls are photoinitiator radicals formed by ultraviolet rays, and these radicals have soft or hard segments and oligomers having double bonds in functional groups. It hardens by reacting with (Oligomer) or monomer (Monomer). In addition, the glass powder contains elements such as Pb, B, Si, Al, O, and the like, and includes a cellulose binder and an alcohol solvent.

When the hardening paste for the partition is cured, the soft mold is released as shown in FIG. 3D to form the partition wall 360 before the predetermined partition. When the partition wall is finally subjected to a predetermined process for the partition, the partition wall as shown in FIG. 3E ( It is possible to obtain a PDP lower plate is formed 380.

4 is a view schematically showing an apparatus used in a PDP barrier rib manufacturing process according to the present invention.

An embodiment of the PDP barrier rib manufacturing process according to the present invention will be described with reference to FIGS. 3 and 4 as follows.

First, the soft mold 480 prepared on the PDP lower plate 490 to which the addressing electrode (not shown) and the dielectric layer (not shown) are continuously manufactured is made into a roll 410 to enable a continuous process.

In addition, the two rolls 460 and 470 in contact with the flat plate are intended to increase the adhesion between the soft mold 480 and the PDP lower plate 490, and one of the rolls 460 is a hardening paste supplying device 430 for partition walls. Moving horizontally in the direction of helps to insert the curable paste for partition into the shape of the soft mold.

In addition, the other roll 470 serves to support the barrier curable paste so as not to be detached from the PDP lower plate until it is cured by ultraviolet light by the UV supply device 420. It helps to release.

The soft mold 480, contaminated using one or several times, is wound onto another roll 450 through transfer, and this series of operations is performed continuously.

According to the present invention, the process for manufacturing the PDP partition wall is simplified, there is an effect of reducing the process time and cost.

In addition, by forming the partition wall through a simple soft mold manufacturing, there is an advantage that it is easy to apply to high resolution and large screen.

Claims (10)

Preparing a soft mold having a plurality of intaglio shapes, and a PDP lower plate on which address electrodes and dielectric layers are formed; Coating a curable paste for partition walls between the soft mold and the PDP lower plate provided with the address electrode and the dielectric layer; Inserting the barrier curable paste into the plurality of intaglio shapes provided in the soft mold; Curing the barrier curable paste; And forming a barrier rib on the PDP lower plate by releasing the soft mold. The method of claim 1, The process of forming a partition of the plasma display panel, wherein the soft mold is released to form a partition. The method of claim 1, The barrier rib forming method of the plasma display panel, wherein the curable paste for barrier ribs comprises a thermosetting resin, a photocurable resin, or an ultraviolet curable resin. The method of claim 3, wherein When the curable paste for partition walls is an ultraviolet curable resin, it is selected from a group of compounds comprising oligomers, binders, plasticizers, and solvents of soft and hard segments. The barrier rib forming method of the plasma display panel, characterized in that at least one material. The method of claim 1, A plurality of intaglio formed in the soft mold is formed in a pattern of various shapes such as a stripe shape or an ellipse shape. The method of claim 1,  The soft mold, Applying a photoresist having a predetermined thickness on the transparent substrate; Laminating a photo mask on a predetermined position of the photoresist and then performing an exposure and development process; Forming a primitive mold having the same shape as the partition wall to be formed on the lower surface of the PDP through the exposure and development processes; Applying a predetermined UV curable resin to the transparent support made of the raw mold and the transparent material to closely contact each other, and irradiating ultraviolet (UV) through an upper portion of the transparent support; Curing the ultraviolet curable resin by irradiation of ultraviolet rays, and then releasing it in the raw mold; And forming a soft mold having a plurality of indentations corresponding to the shape of the partition wall to be provided in the lower surface of the PDP through the release of the primitive models. The method of claim 6, The predetermined UV curable resin component has a soft or hard segment (soft or hard segment), the viscosity of the plasma display panel, characterized in that it has a 200 ~ 2,000 cps at room temperature. The method of claim 6,  The predetermined UV curable resin includes an oligomer or monomer having polyester, urethane, epoxy, silicone and acrylate functional groups. A partition wall forming method of a plasma display panel, characterized in that. The method of claim 6, The material of the transparent support is formed of polycarbonate, polyethersulfone, polyetherimide, polyester, polyester. The method of claim 6, And the thickness of the photoresist is formed to be at least equal to or larger than the height of the barrier rib of the PDP lower plate to be formed.

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