KR20050094666A - Glass substrate cutting machine and plasma display panel manufacturing method - Google Patents

Abstract

The present invention provides a method of manufacturing a plasma display panel that improves the quality of a product by making the depth of the scribing line uniform when cutting the back of the glass substrate.

In the method of manufacturing a plasma display panel according to the present invention, a first glass substrate manufacturing step of forming a film portion of a laminated structure such as a discharge sustaining electrode, a dielectric layer, and a protective film on a first glass substrate and cutting the first glass substrate is performed. ; A second glass substrate manufacturing step of forming a film portion having a stacked structure such as an address electrode, a dielectric layer, a partition wall, and a phosphor layer perpendicular to the discharge sustaining electrode on a second glass substrate, and cutting the second glass substrate; And a sealing step of aligning and sealing the first and second glass substrates. In the first and second glass substrate fabrication steps, the glass substrate side on which the film is formed is supported by rolling movement of the rolls. A scribing line is formed on the rear surface of the glass substrate while moving the wheel cutter like a roll on the opposite side of the opposing glass substrate.

Description

Glass substrate cutting machine and plasma display panel manufacturing method {GLASS SUBSTRATE CUTTING MACHINE AND PLASMA DISPLAY PANEL MANUFACTURING METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass substrate cutting machine and a method for manufacturing a plasma display panel, and more particularly, to a glass substrate cutting which improves the quality of a product by uniformizing the depth of a scribing line when cutting the back of the glass substrate. The present invention relates to a machine and a plasma display panel manufacturing method.

In general, a plasma display panel (PDP, hereinafter referred to as PDP) is used to display an image using a gas discharge phenomenon, and has excellent display capability such as display capacity, brightness, contrast, afterimage, viewing angle, and the like. The PDP generates a gas discharge between the electrodes by a direct current or an alternating voltage applied to the electrode, and excites the phosphor by the radiation of ultraviolet rays that accompanies the light, thereby emitting light.

The AC PDP, which is distinguished from the direct current type according to the driving method, forms an X electrode and a Y electrode corresponding to the discharge sustaining electrode on the inner surface of the front glass substrate, and forms an address electrode and a partition on the inner surface of the rear glass substrate. The X and Y electrodes are arranged in pairs in one discharge cell to generate sustain discharge therebetween during PDP operation. In general, the X electrode, the Y electrode and the address electrode are each formed in a stripe shape on the inner surface of the front and rear glass substrates, and cross each other at right angles when the front and rear glass substrates are assembled to each other.

A dielectric layer and a protective film are sequentially stacked on the inner surface of the front glass substrate to cover the X and Y electrodes. Dielectric layers and barrier ribs are sequentially stacked on the inner surface of the back glass substrate to form discharge cells. Phosphors are applied to the inner surface of the partition wall forming each discharge cell and the surface of the dielectric layer to form a phosphor layer. An inert gas such as neon (Ne) and xenon (Xe) is filled in the discharge cell in which the phosphor layer is formed.

When the operation of the PDP is schematically explained, first, when an address voltage and a scan voltage are applied to the address electrode and the Y electrode, respectively, address discharge occurs and wall charges are formed in the discharge cell. Next, when a discharge sustain voltage is applied between the Y electrode and the X electrode, a sustain discharge occurs in the discharge cell when the discharge start voltage is added to the wall voltage formed by the wall charge. In the sustain discharge state, the light in the ultraviolet region of the discharge light impinges on the phosphor to emit visible light, and accordingly, each pixel formed for each discharge cell implements an image.

As described above, the X, Y electrodes, the dielectric layer, and the protective film are formed on the inner surface of the front glass substrate, and the address electrode, the dielectric layer, the phosphor layer, and the partition wall are formed on the inner surface of the rear glass substrate, and then the two glass substrates are mutually sealed. Then, the air in the space formed between the two glass substrates thus sealed is removed, and then the PDP is completed by injecting an inert gas into the space.

The front and back glass substrates are subjected to a process of being cut by a glass substrate cutting machine before being sealed to each other in a multi-layered PDP production process, in the state of forming multilayer films on the inner surface as described above. do.

6 is a perspective view of a process of cutting a glass substrate of a plasma display panel with a glass substrate cutting machine according to the prior art.

Referring to the drawings, this glass substrate cutting machine is used to cut the glass substrate 51 in order to cut the glass substrate 51 while preventing contamination of the film portion 51a in the glass substrate 51 which is formed of a multi-sided surface (for example, two surfaces). A back cutting method of cutting the glass substrate 51 by forming a scribing line on the opposite side of 51a) is applied. A suction 53 is provided below the glass substrate 51, and a straight line is disposed thereon. A bar 55 in a state is provided, and a wheel cutter 57 is provided on a lower surface of the glass substrate 51 facing the bar 55.

The glass substrate cutting machine lifts and lifts the suction 53 on the lower surface of the glass substrate 51 to fix the glass substrate 51 firstly, and lowers the bar 55 to lower the glass substrate 51 from the upper surface. This scribing line is formed by moving the wheel cutter 57 to form a scribing line on the bottom surface of the glass substrate 51 by fixing it to the lower surface of the glass substrate 51 by fixing the upper and lower sides of the glass substrate 51. This makes it possible to finally break the glass substrate 51.

Such a glass substrate cutting machine moves the wheel cutter 57 while pressing the portion 51b where the film 51a is not formed on the glass substrate 51 with the bar 55 which is lifted and operated. In order to press 51 to a stable structure and to make the depth of the scribing line uniform, a bar 55 having a length that spans the entire width W of the glass substrate 51 is required.

In addition, since the glass substrate cutting machine is pressed by the bar 55 having the above length, when the wheel cutter 57 moves, the descending force and the wheel cutter 57 which are the combined force of the bar 55 and the suction 53 are moved. The difference in force is generated between the upward forces of and the depth of the scribing line fluctuates due to the fluctuation of the force difference, which is the quality of the glass substrate 51 and moreover the PDP using the same. In order to prevent this, it is required to include a sensor (not shown) in the wheel cutter 57 to prevent this. This sensor senses the depth of the scribing line first formed by the wheel cutter 57 and allows to control the depth of the scribing line to be formed later on this basis.

In addition, since the glass substrate cutting machine moves the wheel cutter 57 while the bar 55 is fixed when the glass substrate 51 is cut, the bar 55 and the wheel cutter (after cutting the glass substrate 51) The operation mismatch between the two causes the operation interference between the two, and when breaking after scribing, glass particles are generated due to the bar 55 having a considerable length.

The present invention has been made to solve the above problems, the object is to produce a glass substrate cutting machine and plasma display panel to improve the quality of the product by uniformizing the depth of the scribing line when cutting the back of the glass substrate To provide a way.

Plasma display panel manufacturing method according to the present invention in order to achieve the above object,

A first glass substrate manufacturing step of forming a film portion having a laminated structure such as a discharge sustaining electrode, a dielectric layer, and a protective film on the first glass substrate, and cutting the first glass substrate;

A second glass substrate manufacturing step of forming a film portion having a stacked structure such as an address electrode, a dielectric layer, a partition wall, and a phosphor layer perpendicular to the discharge sustaining electrode on a second glass substrate, and cutting the second glass substrate; And

And a sealing step of aligning and sealing the first and second glass substrates.

In the first and second glass substrate fabrication steps, the glass substrate side on which the film is formed is supported by rolling movement of the roll, and the wheel cutter is moved like a roll on the opposite side of the glass substrate against the roll, and the rear surface of the glass substrate is moved. To form a scribing line.

Rolling movement of the roll proceeds in a state in which the roll is elastically supported in the vertical direction with respect to the glass substrate.

It is preferable that the rolling speed of the roll coincides with the scribing line forming speed of the wheel cutter.

Rolling movement lines of the roll are formed at equal intervals on both sides with a scribing line therebetween.

The rolling movement line of the roll is preferably formed on the same line as the scribing line.

In addition, the glass substrate cutting machine according to the present invention,

In manufacturing the PDP by sealing the first and second glass substrates, the first glass substrate is formed by forming a film portion of a laminated structure such as a discharge sustaining electrode, a dielectric layer, and a protective film, and an address electrode, a dielectric layer, a partition wall, and a phosphor layer. In order to cut the 2nd glass substrate which formed the film part of the same laminated structure,

A plurality of suctions having a lifting structure to suck and support the rear surface of the glass substrate with an equal suction support force;

A wheel cutter located between the plurality of suctions and located on opposite sides corresponding to the membrane portions; And

And a roll against the wheel cutter and positioned to be cloudable between the membrane portions.

The roll has a structure supported by the elastic member to apply a force in the vertical direction toward the glass substrate.

It is preferable that the said roll is formed in the part which opposes the tip of a wheel cutter in concave shape.

The said roll may be formed convex in the part which opposes the front-end | tip of a wheel cutter.

The roll is preferably formed of a material having a hardness lower than the hardness of the glass substrate.

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

1 is a partially exploded perspective view schematically showing a part of a plasma display panel manufactured by the method of manufacturing a plasma display panel according to the present invention.

Referring to the drawings, the PDP forms an X electrode 3 and a Y electrode 5 on the inner surface of the front glass substrate 1 (hereinafter referred to as a 'first glass substrate') and serve as discharge sustaining electrodes, and the rear glass An address electrode 9 and a partition 11 are formed on the inner surface of the substrate 7 (hereinafter referred to as a “second glass substrate”). The X and Y electrodes 3 and 5 are composed of a plurality of pairs, and a sustain discharge occurs during the operation of the PDP between the X electrode 3 and the Y electrode 5. The X electrode 3, the Y electrode 5, and the address electrode 9 are formed in a stripe shape on the inner surfaces of the first glass substrate 1 and the second glass substrate 7, respectively, to form the first glass substrate 1. ) And the second glass substrate 7 cross each other at right angles to each other.

The dielectric layer 13 and the protective film 15 are sequentially stacked on the inner surface of the first glass substrate 1. On the other hand, the partition 11 is formed on the upper surface of the dielectric layer 17 in the second glass substrate 7, and the discharge cell 19 is formed by the partition 11. Inside the partition 11 forming each discharge cell 19, a phosphor 21 emitting light of any one of three primary colors red (R), green (G), and blue (B) is coated. The discharge cell 19 is filled with an inert gas such as neon (Ne) and xenon (Xe).

In the PDP, the X and Y electrodes 3 and 5 are formed in a stripe shape, but are not limited thereto, and may be variously formed, such as a protrusion structure toward the discharge cell 19. The partition 11 to be formed is also formed in an open form of a stripe shape, but is not limited thereto, and may be formed in various ways such as being formed in a closed form such as a lattice form. The characteristic configuration of the first and second glass substrates 1 and 7 in this PDP will be described in detail through the following PDP manufacturing method.

2 is a flowchart of a method of manufacturing a plasma display panel according to the present invention.

Referring to the drawings, this PDP manufacturing method produces a first glass substrate (1), and separately a second glass substrate (7) to seal the first and second glass substrates (1, 7) to each other After the gas in the space in the sealed first and second glass substrates 1 and 7 is exhausted, an inert gas is injected into the space to complete the PDP.

In the preparing of the first glass substrate 1, the X and Y electrodes 3 and 5 are arranged in parallel on the inner surface of the first glass substrate 1 to form a pair, and the X and Y electrodes 3, 5) A plurality of pairs are formed, and the X and Y electrodes 3 and 5 pairs thus formed are filled with the dielectric layer 13 and the protective film 15.

In the manufacturing step of the second glass substrate 7, the address electrode 9 is formed on the inner surface of the second glass substrate 7 and then embedded in the dielectric layer 17, and the partition 11 is formed on the dielectric layer 17. After forming the film, the phosphor layer 21 is formed on one side of the partition wall 11.

In the production of the multi-faceted PDP, the first and second glass substrates 1 and 7 which have undergone the manufacturing process separately are subjected to the first and second glass substrate cutting processes before they are sealed to each other. In order to collectively explain this 1st, 2nd glass substrate cutting process, the 1st, 2nd glass substrate 1, 7 is collectively called the glass substrate 1, 7 below for convenience.

Although the first glass substrate 1 has the X, Y electrodes 3 and 5, the dielectric layer 13, and the protective film layer 15 formed on the inner surface thereof in a multilayer structure, the second glass substrate 7 ) Forms an address electrode 9, a dielectric layer 17, a partition 11, a phosphor layer 21 and a discharge cell 19 in a multi-layered structure on the inner surface thereof. Since it is not necessary to distinguish these multilayer structures in particular in a cutting process, the multilayer structure part formed in the inner surface is called the membrane parts 1a and 7a below.

3 is a front sectional view of a process of cutting a glass substrate of a plasma display panel with the glass substrate cutting machine of the first embodiment according to the present invention, and FIG. 4 is a glass substrate of the plasma display panel with the glass substrate cutting machine according to the present invention. It is a side sectional view of a process to cut | disconnect.

Referring to the drawings, the glass substrate cutting machine used for backside cutting of these glass substrates 1 and 7 is demonstrated as follows. Since the glass substrate cutting machine can be made in various configurations, only the main part is shown and only the illustrated part will be described. The suction of the glass substrate 1 and 7 with the film parts 1a and 7a formed thereon can be cut. 23, a wheel cutter 25, and a roll 27.

The suction 23 is provided under the glass substrates 1 and 7 in such a manner as to be able to adsorb and support the rear surfaces of the glass substrates 1 and 7 evenly, and the glass substrates 1 and 7 continuously supplied and supplied. It is preferable that the lifting structure is configured to facilitate mounting of the). The suction 23 is configured to seat the glass substrates 1 and 7 by its suction force and to support the weight of the seated glass substrates 1 and 7.

The wheel cutter 25 is provided between the lower suctions 23 of the glass substrates 1 and 7 so as to cut the glass substrates 1 and 7 supported by the suctions 23 from the rear side. In other words, the wheel cutter 25 is located on the opposite side corresponding to the membrane portions 1a and 7a of the multifaceted glass substrates 1 and 7. The wheel cutter 25 is moved as shown in FIG. 4 to form a scribing line S by scratch on the back surface of the glass substrates 1 and 7 to finally break. do.

When the suction 23 and the wheel cutter 25 are mutually operated as described above, the roll 27 provides a downward force against the upward force received by the glass substrates 1 and 7 so that the scribing line S Is positioned so as to be able to move between the membrane portions (1a, 7a) so that the depth (Ds) of the constant.

That is, the roll 27 is provided in a state where no force is applied above the glass substrates 1 and 7, and the glass substrates 1 and 7 are lifted upward by the upward force of the wheel cutter 25. Only when it is in close contact with each other to support the glass substrate (1, 7). In this way, when the glass substrates 1 and 7 are subjected to upward force, the rolls 27 are elastic so as to exert a force in the vertical direction toward the glass substrates 1 and 7 vertically above the glass substrates 1 and 7. The member 29 is interposed. The elastic member 29 absorbs the difference between the upward force of the wheel cutter 27 and the downward support force of the roll 27 in the glass substrates 1 and 7, so that the scribing line S of the scribing line S by the wheel cutter 25 is absorbed. Make the depth Ds constant.

The roll 27 may be formed in various shapes in order to stably support the glass substrates 1 and 7, and a portion opposed to the tip of the wheel cutter 27 is formed to be concave (see FIG. 3). The rolling movement line L1 of the roll 27 by this roll 27 is formed in the same space | interval on both sides with the scribing line S in between.

5 is a front sectional view of a process of cutting a glass substrate of a plasma display panel with the glass substrate cutting machine of the second embodiment according to the present invention. Since the structure of this second embodiment except for the roll 27 is the same as that of the first embodiment, the detailed description of the same portion will be omitted and only the other portions will be described.

Referring to the drawings, the roll 27 supports the glass substrates 1 and 7 stably while opposing portions of the roll 27 against the tip of the wheel cutter 27 so that the cutting force of the wheel cutter 27 can be transmitted more reliably. It is formed convexly. The rolling movement line L2 of the roll 27 by this roll 27 is formed in the same position as the scribing line S. FIG.

As described above, the rolls 27 of the first and second embodiments may be formed of a material having a hardness lower than that of the glass substrates 1 and 7 so as to protect the glass substrates 1 and 7. Thus, the roll 27 made of a material of low hardness does not cause scratches on the glass substrates 1 and 7 during rolling movement, and contacts the glass substrates 1 and 7 only at one point even when breaking. Since most ranges of the glass substrates 1 and 7 are non-contact, glass particles can be prevented from being splashed by the rolls 27, thereby preventing contamination of the film portions 1a and 7a by the glass particles.

The plasma display panel manufacturing method using the glass substrate cutting machine configured as described above includes the steps of manufacturing the first and second glass substrates as described above.

In this step, the roll 27 is elastically responsive to the force that the glass substrates 1 and 7 try to lift, i.e., upward force, while rolling on the side of the glass substrates 1 and 7 on which the film portions 1a and 7a are formed. On the back side of the glass substrates 1 and 7, the wheel cutter 25 moves with the rolls 27 on the opposite side of the glass substrates 1 and 7 against the rolls 27. (S) is formed.

At this time, the roll 27 is elastically supported while being elastically supported by the elastic member 29 with respect to the vertical direction of the glass substrate (1, 7). It is preferable that the rolling movement speed of this roll 27 is matched with the formation speed of the scribing line S of the wheel cutter 25. As shown in FIG. The speed coincidence between the two moves the roll 27 and the wheel cutter 25 in parallel at the same position with the glass substrates 1 and 7 interposed therebetween, thereby eliminating the operation interference between the two.

The first and second glass substrates 1 and 7 manufactured in the above-described process are sealed to each other in the next process to discharge the air therein, and then inert gas is sealed to complete the PDP.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, the present invention elastically supports the glass substrate in a state in which the inner surface of the glass substrate on which the film portion is formed is elastically supported by the roll and the back surface of the glass substrate facing the roll is suction-supported by the suction. By simultaneously moving the roll and the wheel cutter to form a scribing line on the back of the glass substrate, the depth of the scribing line can be formed uniformly, thereby improving the quality of the PDP to which the glass substrate is applied. It works.

1 is a partially exploded perspective view schematically showing a part of a plasma display panel manufactured by the method of manufacturing a plasma display panel according to the present invention.

2 is a flowchart of a method of manufacturing a plasma display panel according to the present invention.

3 is a front sectional view of a process of cutting a glass substrate of a plasma display panel with the glass substrate cutting machine of the first embodiment according to the present invention.

4 is a side cross-sectional view of a process of cutting a glass substrate of a plasma display panel with a glass substrate cutting machine according to the present invention.

5 is a front sectional view of a process of cutting a glass substrate of a plasma display panel with the glass substrate cutting machine of the second embodiment according to the present invention.

6 is a perspective view of a process of cutting a glass substrate of a plasma display panel with a glass substrate cutting machine according to the prior art.

Claims (10)

A first glass substrate manufacturing step of forming a film portion having a laminated structure such as a discharge sustaining electrode, a dielectric layer, and a protective film on the first glass substrate, and cutting the first glass substrate; A second glass substrate manufacturing step of forming a film portion having a stacked structure such as an address electrode, a dielectric layer, a partition wall, and a phosphor layer perpendicular to the discharge sustaining electrode on a second glass substrate, and cutting the second glass substrate; And And a sealing step of aligning and sealing the first and second glass substrates. In the first and second glass substrate fabrication steps, the glass substrate side on which the film is formed is supported by rolling movement of the roll, and the wheel cutter is moved like a roll on the opposite side of the glass substrate against the roll, and the rear surface of the glass substrate is moved. A plasma display panel manufacturing method for forming a scribing line in the. The method of claim 1, Rolling movement of the roll is a plasma display panel manufacturing method in which the roll is in a state in which the elastic support in the vertical direction with respect to the glass substrate. The method of claim 2, And rolling speed of the roll and forming speed of the scribing line of the wheel cutter are consistent with each other. The method of claim 1, Rolling movement line of the roll is a plasma display panel manufacturing method which is formed at equal intervals on both sides with a scribing line therebetween. The method of claim 1, The rolling movement line of the roll is formed on the same line as the scribing line. In manufacturing the PDP by sealing the first and second glass substrates, the first glass substrate is formed by forming a film portion of a laminated structure such as a discharge sustaining electrode, a dielectric layer, and a protective film, and an address electrode, a dielectric layer, a partition wall, and a phosphor layer. In order to cut the 2nd glass substrate which formed the film part of the same laminated structure, A plurality of suctions having a lifting structure to suck and support the rear surface of the glass substrate with an equal suction support force; A wheel cutter located between the plurality of suctions and located on opposite sides corresponding to the membrane portions; And And a roll against the wheel cutter and positioned to be cloudably movable between the membrane portions. The method of claim 6, And the roll is supported by the elastic member to exert a force in the vertical direction toward the glass substrate. The method of claim 6, The roll substrate is a glass substrate cutting machine in which a portion opposed to the tip of the wheel cutter is formed concave. The method of claim 6, The roll substrate is a glass substrate cutting machine in which a portion opposed to the tip of the wheel cutter is formed convex. The method of claim 6, The roll is a glass substrate cutting machine is formed of a material of a hardness lower than the hardness of the glass substrate.