KR19990011149A - Cleaning system for plasma display panels - Google Patents

Abstract

The present invention relates to a PDP cleaning system that removes contamination present on the substrate before forming an electrode or partition on the substrate, and in particular, rotates a roll brush installed in close contact with the substrate to prevent contamination present on the substrate. A first cleaning bath performing a removing operation; an acid shower bath performing an operation of removing an contamination remaining on the substrate by spraying an acid toward the substrate past the first cleaning tank; and a roll provided to be in close contact with the substrate. By having a cleaning system for a PDP comprising a second cleaning tank for rotating the brush to remove the micro-contamination remaining on the substrate, it is possible to respond to the various contamination of the substrate at various angles PDP eliminates retrofitting, reduces additional equipment investment and improves product yield A cleaning system for

Description

Cleaning system for plasma display panels

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP) manufacturing system, and more particularly, to a PDP cleaning system for removing surface contamination of the glass substrate before forming electrodes or partitions on the glass substrate. It is about.

In general, PDP is a flat panel display device using a penning gas for a discharge phenomenon, and constitutes an information display unit of a plasma display device. The PDP is divided into an alternating current (AC) type and a direct current (DC) type according to a discharge method.

A typical AC PDP consists of a surface glass substrate 1 and a rear glass substrate 5 positioned opposite to each other as shown in Figs. 1A and 1B.

The surface glass substrate 1 may include a display electrode 2 formed on a bottom surface thereof, a dielectric layer 3 formed on the display electrode 2, and a magnesium oxide (MgO) film deposited on the dielectric layer 3. The back glass substrate 5 comprises an address electrode 6 formed on an upper surface thereof, and a partition wall 7 formed in a stripe shape between the address electrodes 6.

In addition, the partition wall 7 serves to separate the address electrode 6 into a plurality of discharge cells, and cover the address electrode 6 with red (R), green (G), and blue (B) shapes. Phosphor 8 is divided and applied, and discharge gas 9 such as neon, helium, and xenon is filled between the surface glass substrate 1 and the rear glass substrate 5. have.

In addition, the surface glass substrate 1 and the rear glass substrate 5 are frit sealed using a cured sealing material 10, so that the display electrode 2 and the address electrode 6 are perpendicular to each other. Are assembled.

The PDP configured as described above discharges the surface of the dielectric layer 3 and the protective layer 4 on the electrode by applying a voltage between the transparent electrodes to generate ultraviolet rays. By the ultraviolet rays, the phosphor coated on the back glass substrate 5 is excited and emits light, and color display is performed by the phosphor coated separately.

Referring to FIG. 2, a cleaning system for a PDP according to the related art is as follows.

First, reference numeral 110 denotes a disk brush tank for performing an operation of removing contamination on the glass substrate 100 by rotating a disk brush 111 installed to be in close contact with the upper surface of the glass substrate 100. Reference numeral 120 denotes a contamination remaining on the glass substrate 100 by rotating a roll brush 121 installed behind the disk brush bath 110 and installed in close contact with the upper surface of the glass substrate 100. Represents a roll brush bath to perform the operation to remove the.

At this time, the degree of removal of contamination present on the surface of the glass substrate 100 is the rotational force of the disk brush 111 and the roll brush 121, the adhesion of the glass substrate 100 and the disk brush 111, the glass It is determined by the adhesion between the substrate 100 and the roll brush 121, the moving speed of the glass substrate 100, and the like.

In addition, reference numeral 130 is an operation of removing the residual contamination remaining on the surface of the glass substrate 100 by spraying pure water through the nozzle 131 to the glass substrate 100 past the roll brush bath 120. A first shower bath is shown, and reference numeral 140 denotes an ultrasonic bath that performs an operation of removing fine contamination remaining on the glass substrate 100 past the first shower bath 130 using ultrasonic waves.

Here, the ultrasonic bath 140 includes a container 141 in which pure water is stored and an upper surface thereof is opened, and an ultrasonic oscillator 143 installed in the container 141. In the ultrasonic bath 140 configured as described above, when the glass substrate 100 is immersed in the pure water of the container 141, the aggregation and dispersion of sound waves occur by the ultrasonic oscillator 143. And by the dispersing action, fine contamination existing on the glass substrate 100 is peeled off, and cleaning is performed.

In addition, reference numeral 150 denotes an agent for spraying pure water through the nozzle 151 to the glass substrate 100 past the ultrasonic bath 140 to completely remove the suspended matter remaining on the glass substrate 100. 2 denotes a shower tank, and reference numeral 160 denotes a method of forcibly pushing moisture by injecting compressed air through an air knife 161 to the glass substrate 100 passing through the second shower tank 150. Represents a drying tank performing an operation of drying the glass substrate 100.

Here, the glass substrate 100 continues to move without stopping from the loader to the unloader through the conveyor 101 operated by the rotation of the roller.

However, in the cleaning system for the PDP configured as described above, since the glass substrate 100 proceeds directly to the disk brush bath 110 at the loader, external contaminants may penetrate into the disk brush bath 110. The glass substrate 100 may not adapt to the environment in the disc brush bath 110 due to a sudden change in the environment.

In addition, the cleaning system for a PDP according to the prior art is abrasion of the disk brush 111 in the disk brush tank 110, difficult to adjust the distance between the disk brush 111 and the glass substrate 100, the glass substrate ( Since the disc brush 111 is installed only on the upper side of the 100, the glass substrate 100 may be bent.

In addition, in the disk brush bath 110, damage may occur on the surface of the glass substrate 100 due to the rotation of the disk brush 111, and contaminants that have been removed once may be reattached. If the substrate 100 is bent, there is a problem that uniform cleaning of the entire surface of the glass substrate 100 is impossible.

In addition, the cleaning system for a PDP according to the related art is a glass substrate 100 in the roll brush tank 120 when the adhesion degree of the glass substrate 100 and the roll brush 121 is uneven or the bending occurs in the roll brush 121, the glass substrate There is a problem that uniform washing cannot be performed on the entire surface of (100).

In addition, in the ultrasonic bath 140 of the PDP cleaning system according to the related art, the lower surface of the glass substrate 100 is cleaned better than the upper surface of the glass substrate 100, and the organic contamination is not well cleaned. If the pure water inside is contaminated, there is a problem that the contaminants peeled off from the glass substrate 100 are reattached.

In addition, the glass substrate 100 is a variety and type of surface contamination of the glass substrate 100 according to the processing technology of the processing company, PDP cleaning system according to the prior art is the first shower bath 130 and the first 2 Since only the pure water is injected through the shower tank 150, various surface contaminations such as surface whitening, sludge, pinholes, debris, and residual abrasives, which are mainly a problem when purchasing the glass substrate 100, are removed. There is a difficult problem.

The present invention has been made to solve the above problems, and by having a cleaning system that can handle various types of surface contamination in a single equipment, it is possible to cope with the contamination of the glass substrate at various angles, the yield of the product It is an object to provide a cleaning system for PDP to be improved.

Figure 1a is a block diagram showing the structure of a typical PDP,

1B is a configuration diagram showing a partial cross section of the PDP;

2 is a block diagram showing a cleaning system for a PDP according to the prior art,

3 is a block diagram illustrating a cleaning system for a PDP according to the present invention;

4 is an operational state diagram of a roll brush according to the present invention;

5a to 5c is a block diagram showing a pipe shower according to the present invention,

Figure 6a is a block diagram showing an air curtain according to the present invention,

6b is an operational state diagram of the air curtain according to the present invention.

* Explanation of symbols for main parts of the drawings

500: glass substrate 510: first atmospheric tank

520: first cleaning tank 530: second atmospheric tank

540: acid shower bath 550: first shower bath

560: second cleaning tank 570: second shower tank

580: rinse tank 590: drying tank

600: air curtain 601: air inlet

603: Body 605: Slit

610: pipe shower 611: cleaning agent inlet

613: Body 615: Hole

620: Roll Brush

A feature of the PDP cleaning system according to the present invention for achieving the above object is a cleaning system for a PDP which removes contamination present on the substrate before forming an electrode or a partition on the substrate, wherein the PDP cleaning system is installed to be in close contact with the substrate. A first cleaning tank performing an operation of removing the contamination present on the substrate by rotating the roll brush; and spraying acid toward the substrate past the first cleaning tank to remove the contamination remaining on the substrate. An acid shower bath for performing an operation of performing an operation, a first shower tank for spraying pure water toward the substrate passing through the acid shower tank to remove acid and suspended matter remaining on the substrate, and a first shower tank passing through the first shower tank A second cleaning bath for rotating the roll brush provided to be in close contact with the substrate to remove fine contamination remaining on the substrate; A second shower bath for spraying pure water toward the substrate past the bath to remove fine suspended matter remaining on the substrate, and contamination remaining on the substrate by spraying pure water toward the substrate past the second shower bath And a rinsing tank for completely removing the rinse tank, and a drying tank for drying the substrate by spraying compressed air toward the substrate past the rinsing tank.

In addition, an additional feature of the present invention is that the front and rear of the first cleaning tank, respectively, the first atmospheric tank to perform the operation of adapting the substrate supplied from the outside to the environment inside the system, and the acid used in the acid shower bath A second atmospheric tank is installed to prevent the substrate from flowing into the first cleaning tank, and an inlet of the first cleaning tank, an inlet of the second waiting tank, an inlet and an outlet of the acid shower bath, and an inlet side of the drying tank are provided. An air curtain is installed, and the air curtain is composed of an air inlet port through which compressed air is supplied, a body connected to the air inlet port, and a slit coupled to the body to inject compressed air. .

In addition, another additional feature of the present invention is that the first cleaning tank and the second cleaning tank are provided with at least one roll brush on the upper side and the lower side of the substrate, respectively, the first cleaning tank and the second cleaning tank at the top thereof Pipe showers for spraying a cleaner toward the substrate are provided, respectively, and the pipe shower is configured of a cleaner supply port through which a cleaner is supplied, and a cylindrical body connected to the cleaner supply port and having a plurality of holes formed in a lower side thereof. It is.

In addition, another additional feature of the present invention is that the first cleaning bath is a neutral detergent supplied through the pipe shower, and the second cleaning bath is a pure water supplied through the pipe shower.

In addition, the present invention configured as described above is able to cope with various angles to the various contamination of the substrate, there is an advantage that the system does not need to be retrofitted, additional equipment investment is reduced and the yield of the product is improved.

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

3 is a configuration diagram showing a cleaning system for a PDP according to the present invention, Figure 4 is an operational state diagram of a roll brush according to the present invention, Figure 5a is a perspective view showing a pipe shower according to the present invention, Figure 5b is Figure 5a 5C is a bottom view of FIG. 5A, FIG. 6A is a configuration diagram showing an air curtain according to the present invention, and FIG. 6B is an operation state diagram of the air curtain according to the present invention.

Referring to Figure 3 describes a cleaning system for a PDP according to the present invention.

First, reference numeral 520 denotes a first cleaning tank for rotating the roll brush 620 installed to be in close contact with the glass substrate 500 to remove the contamination present on the glass substrate 500. 510 denotes a first atmospheric tank installed in front of the first cleaning tank 520 and adapted to adapt the glass substrate 500 supplied from the outside to the environment in the system.

In addition, reference numeral 540 denotes a surface whitening, sludge, residual abrasive, pinhole, surface on the glass substrate 500 by spraying an acid through the nozzle 541 onto the glass substrate 500 passing the first cleaning tank 520. An acid shower bath which performs an operation of removing surface contamination such as scratches is shown. At this time, the acid is sprayed in the form of a spray (conical spray) to be uniformly sprayed on the upper surface of the glass substrate 500.

Also, reference numeral 530 is provided between the first cleaning tank 520 and the acid shower tank 540 to perform the operation of blocking the first cleaning tank 520 and the acid shower tank 540. Reference numeral 550 denotes an operation of removing pure acid and suspended matter remaining on the glass substrate 500 by spraying pure water through the nozzle 551 to the glass substrate 500 passing the acid shower tank 540. The first shower bath is performed, and reference numeral 560 rotates the roll brush 620 installed to be in close contact with the glass substrate 500 passing through the first shower bath 550 and remains on the glass substrate 500. The 2nd washing tank which removes microcontamination is shown.

In addition, reference numeral 570 performs an operation of removing fine suspended matter remaining on the glass substrate 500 by spraying pure water through the nozzle 571 to the glass substrate 500 passing through the second cleaning tank 560. A second shower bath is shown, and reference numeral 580 denotes a glass substrate 500 passing through the second shower bath 570 to spray ultrapure water through the nozzle 581 to prevent contamination remaining on the glass substrate 500. A rinsing tank which performs an operation of removing completely, reference numeral 590 denotes a glass substrate 500 passing through the rinsing tank 580 and sprays compressed air through an air knife 591 to force moisture. Represents a drying tank that performs an operation of drying the glass substrate 500 by pushing.

Here, the first cleaning tank 520 and the second cleaning tank 560, at least one roll brush 620 is installed on the upper and lower sides of the glass substrate 500, respectively, as shown in Figs. In the upper part, a cleaner supply port 611 through which a cleaner is supplied to spray the cleaner toward the glass substrate 500, and a plurality of holes 615 connected to the cleaner supply port 611 and lower side thereof. A pipe shower 610 composed of the formed cylindrical body 613 is installed.

The first cleaning tank 520 and the second cleaning tank 560 configured as described above are rotated by the roll brush 620 in a direction opposite to the direction in which the glass substrate 500 moves, and cleaning is performed by the mutual rotational force. The roll brush 620 is installed to facilitate the rotational force of the roll brush 620 and the gap between the roll brush 620 and the glass substrate 500 to improve cleaning power.

In addition, in the first cleaning tank 520, the pipe shower 620 may be prevented to prevent contamination of the roll brush 620 and scattering of the removed contaminants and to remove organic pollution on the glass substrate 500. Neutral detergent is sprayed through, and the second cleaning tank 560 sprays pure water to remove fine organic and metal contamination.

In addition, the inlet of the first cleaning tank 520, the inlet of the second atmospheric tank 530, the inlet and outlet of the acid shower tank 540, the inlet side of the drying tank 590 as shown in Figure 6a It is composed of an air inlet 601 is supplied, the body 603 is connected to the air inlet 601, the compressed air is introduced, and the slits 605 are coupled to the body 603 to inject the compressed air Thus, the air curtain 600 for injecting compressed air toward the glass substrate 500 is provided so as to be located on the upper and lower sides of the glass substrate 500.

The air curtain 600 configured as described above is sprayed compressed air to the glass substrate 500 through the slits 605 as shown in FIG. Neutral detergent, acid, pure water, etc. sprayed toward) serves as a blocking film to prevent the glass substrate 500 from flowing into another working tank.

In the cleaning system configured as described above, the glass substrate 500 continues to move without stopping from the loader to the unloader through the conveyor 501 operated by the rotation of the roller 503.

PDP cleaning system according to the present invention configured and operated as described above is one of various surface contamination such as surface whitening, inorganic pollution, organic pollution, sludge, pinhole, residual abrasive, debris existing on the glass substrate 500 By providing a cleaning system that can handle all of the equipment in the equipment can be coped with a multi-angle response to contamination of the glass substrate 500, there is no need to modify the system, additional equipment investment is reduced and the yield of the product is improved.

In addition, since the present invention can cope with all kinds of contamination, it is not necessary to perform the overhaul required when the glass substrate 500 is imported, and the price of the glass substrate 500 can be diversified to reduce the cost. There is an advantage.

Claims (9)

In the cleaning system for PDP to remove the contamination present on the substrate before forming an electrode or partition on the substrate, A first cleaning tank performing an operation of removing contamination present on the substrate by rotating a roll brush provided to be in close contact with the substrate, and an acid is sprayed toward the substrate past the first cleaning tank to remain on the substrate; An acid shower bath for removing contamination; a first shower bath for spraying pure water toward a substrate past the acid shower tank to remove acid and suspended matter remaining on the substrate; and the first shower A second cleaning tank that rotates a roll brush installed to closely adhere to the substrate passing through the tank to remove fine contamination remaining on the substrate, and fine water remaining on the substrate by spraying pure water toward the substrate past the second cleaning tank; A second shower bath which performs an operation of removing floating matter, and pure water is sprayed toward the substrate past the second shower bath, A rinse tank for completely removing any contaminants, and a drying tank for drying the substrate by spraying compressed air toward the substrate past the rinse tank. . The method of claim 1, In front of and behind the first cleaning tank, respectively, a first atmospheric tank which performs an operation of adapting the substrate supplied from the outside to the environment inside the system, and an acid used in the acid shower bath flows into the first cleaning tank via the substrate. A cleaning system for a PDP, characterized in that a second atmospheric tank is installed to perform an operation of preventing the same. The method of claim 2, PDP cleaning system, characterized in that the air curtain is installed on the inlet of the first cleaning tank, the inlet of the second atmospheric tank, the inlet and outlet of the acid shower tank, the inlet of the drying tank. The method of claim 3, The air curtain is a cleaning system for a PDP, characterized in that the compressed air is supplied with an air inlet, the body connected to the air inlet, and the body is combined with the slitting to inject compressed air. The method of claim 1, And at least one roll brush is provided at the upper side and the lower side of the substrate, respectively, in the first and second cleaning tanks. The method of claim 5, The cleaning system for a PDP, wherein the first cleaning tank and the second cleaning tank are respectively provided with pipe showers for injecting a cleaning agent toward the substrate. The method of claim 5, The pipe shower is a cleaning system for a PDP, characterized in that consisting of a cylindrical body having a plurality of holes formed in the lower side and connected to the cleaner supply port, the cleaning agent supply port. The method of claim 5, The first cleaning tank is a cleaning system for a PDP, characterized in that the cleaning agent supplied through the pipe shower is a neutral detergent. The method of claim 5, The second cleaning tank is a cleaning system for a PDP, characterized in that the cleaning agent supplied through the pipe shower is pure water.