MXPA97006601A - Flat panel display device and my elaboration method - Google Patents

Abstract

A flat panel display device is provided, particularly, a liquid crystal display (LCD) and a plasma display panel (PDP), and methods of making them. A laser transcription method is used to form the spacers or walls of the barrier that are located between the upper and lower substrates of the LCD or PDP to maintain the space between the two substrates at a predetermined distance. That is, a donor film that includes a base film, a light absorbing layer and a transcription layer is placed on the lower LCD substrate, in which a transparent substrate a transparent electrode and an alignment layer are stacked in sequences, or on the lower substrate of the PDP, in which a transparent substrate, a directing electrode and a dielectric layer are stacked in sequence, and then a laser beam is transcribed thereon to form the barrier spacers having height and uniform width. Therefore, the space between the two substrates is uniform, so that the presentation characteristics on the screen can be improved by a simple process of elaboration.

Description

FLAT PANEL DISPLAY DEVICE AND METHOD OF ELABORATION OF THE SAME BACKGROUND OF THE INVENTION The present invention relates to a flat panel display device, and more particularly, to a flat panel display device and method of making the same, wherein the characteristics of the screen are uniformly improved by maintaining a Intermediate cell between the upper and lower substrates. The cathode ray tube (CRT), and a flat panel display device such as a liquid crystal display (LCD), a plasma screen (PDP), electro-luminescent screen (ELD), a field emission device (FED) and a light emitting device (LED) are commonly used as image display devices. The CRT has excellent image quality and brightness compared to other devices. However, the volume and weight of the CRT is greater, such that it is difficult to use it for a large screen. In contrast, the flat panel display device is now widely used due to its light weight and small volume. Also, the research of the flat panel display device as a screen for the next generation has been actively developed.

REF: 25573 Particularly, the LCD is a display device that uses peculiar properties of liquid crystal. The liquid crystal is advantageous in advantageous handling and has a characteristic in that the arrangement of the liquid crystals is changed according to the application of an external electric field. In this way, liquid crystal is widely used in the ferroelectric liquid crystal device (FLCD), screwed-in LCD (TN-LCD), thin-film transistor (TFT-LCD) LCD and plastic LCD. FIG. 1 is a sectional view showing the structure of a conventional LCD. First, the ITO electrodes 12 and 12 ', the alignment layers 13 and 13' are stacked sequentially on the transparent substrates 11 and 11 ', respectively, to form the first and second substrates 10 and 10'. Then, a spacer 14 is dispersed between the alignment layers 13 and 13 'of the first and second substrates 10 and 10'. Then, the first and second substrates 10 and 10 'are sealed using the sealant 16, resulting in an intermediate cell between them. Finally, the liquid crystal is introduced into the intermediate cell to form a liquid crystal layer 15. The LCD having the above structure employs a feature that the alignment of the liquid crystals is changed by the application of external voltage, and thus the light incident on the liquid crystal layer is blocked or transmitted. So that, when an electric field is formed in the liquid crystal layer by applying a voltage to the transparent electrode, the liquid crystals are aligned in a predetermined direction, and thus the incident light on the liquid crystal layer is blocked or transmitted according to the alignment pattern of liquid crystals. Such orientation characteristics of the liquid crystals are greatly influenced by the separation of the liquid crystal intermediate cell from the LCD. Thus, since the physical-chemical reaction of the liquid crystals is determined according to the intensity of the applied voltage and the distance between the two electrodes, the physical-chemical reaction of the liquid crystals with respect to the crystals changes and the ratio of transmittance is not uniform, if the thickness of the liquid crystal layer is not uniform. In this way, it is very important to maintain the separation of the intermediate cell in the LCD at a predetermined level to obtain a liquid crystal layer having a uniform thickness in the LCD processing. However, in a conventional LCD, circular or cylindrical spacers having diameters larger than the spacing of the projected intermediate cell are stacked in the alignment layer of one of the two substrates in which a transparent substrate, a transparent electrode and an alignment layer are deposited sequentially. Then, the other substrate is placed on the substrate such that the alignment layers of the two substrates are face to face, and then a sealant such as an adhesive material is applied to the edges of the two substrates. Therefore, the two substrates are sealed under pressure while heat or ultraviolet ray irradiation is applied, forming an intermediate cell. However, if the separation of the intermediate cell is controlled by the above form, several problems arise. First, since the spacers are stacked irregularly, they could be partially agglomerated, resulting in a deviation in the separation of the intermediate cell. In addition, the diameters of the spacers are uneven, such that it is difficult to uniformly control the separation of the intermediate cell. Also, since the spacers are not fixed within the intermediate cell, they flow during the injection of the liquid crystal. Therefore, the alignment layer could be damaged. In addition, the electrodes could be damaged by the spacers when the two substrates are sealed under pressure. Thus, the resulting LCD does not have good light blocking and transmittance characteristics due to the above problems. To solve the above problems, a method of forming the spacer using a photolithographic technique has been suggested. According to this method, a photosensitive material is deposited on the substrate to form a photosensitive layer and then the photosensitive layer is exposed to light and is developed, resulting in spacers having the projected pattern. However, this method could cause damage to the alignment layer. On the other hand, a color LCD includes a first substrate that includes red, green and blue color filters as the three main colors of light, a second substrate that includes an active circuit portion with a thin film transistor, and a liquid crystal layer between the two substrates. FIGS. 2 and 3 show the structure of the first substrate including a color filter layer on a color LCD. The process of forming the first substrate will now be described. First, a black matrix as a light shield 22a (see FIG 2) is formed on a transparent substrate 21. Then, a photosensitive acrylic resin including a dye with a spectroscopic property of red is deposited on the entire surface of the substrate 21, and then a red filter 23 is formed by stove drying, exposure to light and development process. A green filter 24 and a blue filter 25 are formed in the same manner as that of the red filter 23, thereby resulting in a color filter. The color filter could be bands, dots or mosaic. FIG. 3 shows a substrate in which the black matrix 22b is formed after the step of forming a color filter layer 20. Then, a protective film 26 could be formed of a transparent resin having strong surface hardness and excellent light transmittance to protect the black matrix 22a or 22b and the color filter layer 20 from external impact. Then, a transparent electrode layer 27 is formed to orient the liquid crystal and then an alignment layer 28 is formed on the transparent electrode layer, completing the first substrate. In the color filter of the LCD prepared according to the previous process, three wavelength lights are emitted from the fluorescent lamp passed to a filter layer to selectively transmit only a light of predetermined wavelength via a panel of liquid crystal that is opened or closed by an electrical signal, thus achieving a predetermined color (image). On the other hand, the plasma screen panel displays an image using a gas discharge phenomenon, which is excellent in screen capacity, luminance and contrast. As well, there is little residual image and the angle of view is wide. Thus, the plasma screen panel attracts attention as a next generation screen device. In general, the plasma screen panel is made by means of the following steps: first, two transparent substrates made of a transparent material such as glass are prepared. On one of the transparent substrates, a transparent electrode in the form of a band with a predetermined spacing, a collective conductor electrode in the form of a band whose width is narrower than that of the transparent electrode, and a dielectric layer covering the transparent electrode and the conductive electrode collective is formed sequentially to complete a frontal substrate. In the other transparent substrate, a band-shaped steerable electrode that is orthogonal to that of the transparent electrode and a dielectric layer covering the steerable electrode are sequentially formed to form a substrate at the back. Also, the walls of the barrier to maintain a separation between the two substrates at a predetermined level are formed between the two dielectric layers of the front and rear substrates. In a conventional plasma screen panel, the walls of the barrier are formed by repeating a screen printing process several times until the height of the wall of the barrier reaches a predetermined level. However, the height of the barrier wall obtained by this method is not uniform, so that the intermediate cell between the upper and lower substrates is not uniform. Accordingly, an electrical and optical blocking effect between the adjacent cells is not achieved. In addition to the above printing method, a sandblasting method is used. The method of sandblasting however is complicated, and the performance of it is very low. On the other hand, the laser transcription method has been developed in the fields of printing, typographic and photographic composition thirty years ago or more. According to the method of laser transcription, a transcription substance, e.g. ex. , dye or pigment, included in a layer formed on a base film as a support is transcribed in a receiving film (glass film or polymer) according to a projected film pattern (US Patent Nos. 3,787,210 and 5,326,619). Referring to U.S. Pat. No. 3,787,210, a mixture of the transcription material such as dye and pigment and nitrocellulose decomposed by light is deposited on a base film. As a result, the pigment or dye can be transcribed onto the substrate by the explosive force of the gas generated from the nitrocellulose by means of thermal decomposition. However, since such a transcription process consumes a lot of energy, a more effective and stable transcription process is required. As a result, a donor film has been developed. Here, the structure of the donor film is dependent on the thickness and physical properties of the transcription substance and its energy source. The donor film has a structure in which a light absorbing layer to provide the transcription energy by means of a thermal decomposition reaction absorbing light, and a transcription layer including a transcription substance are stacked in a film that functions as support. Here, the light absorption layer having a thickness of about 1,000 A absorbs light and transcribes the transcription substance using the explosive force of the nitrogen gas or hydrogen generated during the thermal decomposition reaction. The above laser transcription method will now be described in detail with reference to FIG. 4 schematically showing a transcription apparatus used in a general method of laser transcription. In FIG. 4, a high-power laser beam is emitted from a power source 41. As the power source that emits power at a speed of 0.1-4W, a high power solid laser such as Nd / YAG, laser gas such as C02 and CO, or a coupled Nd / YAG diode can be used. The emitted laser beam is divided into a plurality of rays having the same intensity via a beam splitter 42. If the intensity of the beam is controlled by dividing the beam into a plurality of rays, a substance can be transcribed in the desired way (Patent No. 4,796,038). The intensity of the plurality of the divided laser beams is controlled by means of a modulator 43 according to a projected shape, and then the laser beam is irradiated on a donor film 46 on which the transcription substance is deposited, via an optical condensation system 44. Here, only the substance deposited on a light receiving portion of the donor film is transcribed onto a substrate 47. The movement of a circuit 48 is controlled together with a grid to control the beam intensity of the beam according to the shape of the desired pattern. The inventors of the present invention have conducted research in a method for forming a flat panel display device from which an intermediate cell between the upper and lower substrates is uniformly maintained using the transcription method described above to thereby improve the characteristics screen display of the flat panel display device.

Brief Description of the Invention It is an object of the present invention to provide a flat panel device such as the liquid crystal display (LCD) and a plasma display panel (PDP), in which an intermediate cell between the upper and lower substrates lower is uniform, improving the presentation characteristics on the screen. It is another object of the present invention to provide a method for making the flat panel display panel. In another aspect of the present invention, there is provided a liquid crystal display including first and second substrates in which a transparent substrate, a transparent electrode and an alignment layer are stacked sequentially, and a liquid crystal layer of which the The thickness is maintained uniformly by means of spacers formed between the alignment layers of the first and second substrates, wherein the height of each spacer and the spacing between the two adjacent spacers is constant. In another aspect of the present invention, there is provided a method for producing a liquid crystal display, comprising the steps of: (a) forming the first and second substrates wherein the transparent substrates, the transparent electrodes and the layers of alignment are stacked sequentially, respectively; (b) placing a donor film including a base film, a light absorbing layer and a transcription layer in a deferred position of the alignment layer of the first substrate by a predetermined distance; (c) transcription of the polymer forming the spacer of the transcription layer on the first substrate irradiating an energy source towards the base film of the donor film to form the spacers, each spacer has equal height and the spacing between two adjacent spacers is uniform; (d) stacking the second substrate on the first substrate wherein the spacers are transcribed to place the face of the alignment layers of the two substrates against each other; and (e) sealing the two substrates by stiffening the spacers by providing light or heat to at least one of the first and second substrates to fix the spacers between the alignment layers of the first and second substrates. In yet another aspect of the present invention, there is provided a plasma screen panel that includes a first substrate in which a transparent substrate, a directing electrode and a dielectric layer are stacked in sequence, a second substrate in which a transparent electrode , a collective conductor electrode and a dielectric layer are stacked in sequence, and barrier walls formed between the first and second substrates to separate the first and second substrates by a certain distance, wherein each wall of the barrier has uniform height and width. In a further aspect of the present invention, there is provided a method for manufacturing a plasma screen panel comprising the steps of: (a) forming a first substrate in which a transparent substrate, a lead electrode and a layer dielectric are stacked in sequence; (b) forming a second substrate in which a transparent substrate, a transparent electrode, a collective conductive electrode and a dielectric layer are stacked in sequence; (c) placing a donor film including a base film, a light absorbing layer and a transcription layer in a position separated from the dielectric layer of the first substrate by a predetermined distance; (d) transcription of a material forming the barrier wall of the transcription layer on the first substrate by irradiation of a light source on the base film of the donor film to form the walls of the barrier, each wall of the barrier has uniform height and width; (e) stacking the second substrate on the first substrate to place the face of the dielectric layers of the two substrates against each other.

BRIEF DESCRIPTION OF THE DRAWINGS The above objects and advantages of the present invention will become more understandable by describing in detail a preferred embodiment thereof with reference to the drawings appended thereto: FIG. 1 is a sectional view of a conventional liquid crystal display (LCD); FIG. 2 is a sectional view showing an example of the color filter layer of the color LCD; FIG. 3 is a sectional view showing another example of the color filter layer of the color LCD; FIG. 4 is a diagram schematically showing a general apparatus used for a laser transcription method; FIG. 5 is a perspective view showing one embodiment of the present invention; FIG. 6 is a diagram illustrating a method for transcribing a material that forms the spacer; and FIG. 7 is a sectional view of an LCD showing another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the appendix of drawings, however, the present invention is not limited to the following.

FIG. 5 shows a mode of a liquid crystal display (LCD) according to an aspect of the present invention. In FIG. 5, the reference numerals 51 and 51 'represent the first and second substrates, the reference numbers 52 and 52' represent the transparent substrates, the reference numbers 53 and 53 'represent the transparent electrodes, the reference numerals 54 and 54 'represent the alignment layers, the reference number 55 represents a spacer formed by the transcription method, and the reference number 56 represents a liquid crystal layer, respectively. As can be seen from FIG. 5 the spacers having a uniform height are formed at predetermined intervals. The LCD shown in FIG. 5 is formed according to the following stages. First, two transparent substrates 52 and 52 ', and the transparent electrodes 53 and 53' and the alignment layers 54 and 54 'are stacked sequentially on each transparent substrate, to form the first and second substrates 51 and 51'. Then, a donor film (not shown) including a base film, a light absorbing layer and a transcription layer are placed separate from the alignment layer 54 of the first substrate 51 by a predetermined spacing. Then, a light source is radiated to the base film of the donor film to transcribe a material that forms the spacer of the transcription layer on the first substrate. Then, the second substrate 51 'is stacked on the first substrate 51 such that the alignment layers 54 and 54' of the first and second substrates 51 and 51 'are placed face to face. Then, the two substrates are sealed by applying light or heat to one of the first and second substrates, therefore an LCD is completed. FIG. 6 is a diagram illustrating the step of transcribing the material forming the spacer in detail. First, a transparent substrate 67, a transparent electrode 66, and an alignment layer 65 are stacked sequentially to form a first substrate. Then for transcription, a light absorbing layer 63 and a transcription layer 64 are sequentially deposited on a base film 62 to make a donor film. Then, after placing the face of the alignment layer 65 towards that of transcription 64, a light source 61 is irradiated towards the base film 62. The irradiated energy activates the light absorption layer 63 via a laser transcription device. 60 and the base film 62, so that the transcription energy is emitted by the thermal decomposition reaction. By means of the explosive force of the transcription energy, the material forming the spacer is transcribed on the alignment layer. As described above, the donor film has a structure in which the base film, the light absorbing layer and the transcription layer are stacked in sequence. In detail, as preferred, the base film is formed of a material having light transmittance of 90% or more, such as polyethylene terephthalate (PET) and polycarbonate.

The light absorbing layer acts as a layer to convert the received light into transcription energy, and could include polymer or metal material. The transcription layer includes a polymer that forms the spacer as the main component, an initiator and hardening agent. Thus, the two substrates can be sealed by hardening the spacers transcribed by the next hardening step. That is, an extra step of sealing the substrate without the need to use a sealant, so that the process is simplified. Here, the polymer could be selected from the group consisting of polyacryl, polyimide, polyvinylalcohol (PVA), polyvinylpyrrolidone (PVP), epoxy resin, phenol-formaldehyde resin and an unsaturated polyester resin. The initiator could also be an organic substance having an unstable functional group such as the azo (-N = N-), disulfide (-S-S-) and peroxide (-0-0-) groups. In detail, the benzoyl peroxide could be used as an optical initiator, and benzophenone and imidizol could be used as a thermal initiator. The hardening agent could be any that can be used in the field related to the present invention. On the other hand, a damping layer could also be included between the light absorption layer and the transcription layer, which is to prevent irregularities of the transcription layer, caused by the transmitted energy of the light absorption layer, and partial transcription of the transcription layer together with the light absorption layer.

Also, as a light source that can be used to transcribe the transcription layer, a UV / VIS light source such as a laser beam, xenon lamp or halogen lamp, or a thermal head could be used. The substrate could be sealed by hardening the spacers by providing light or heat energy from an appropriate light source. Here, the source of light or heat energy used to harden the spacers could be the same as that used for transcription, preferably, a high pressure mercury lamp, a xenon lamp or a flash lamp. In the elaboration of the LCD by means of the processing method described above, preferably, the height of each spacer is 0.5-10 μm, and the spacing between two adjacent spacers is 10-1000 μm. On the other hand, a color LCD could be made by also forming a color filter layer consisting of color filters (red, green and blue filters) on one of the two substrates. If required, a protective film could also be formed in the color filter layer. In this case, the spacers are formed in the liquid crystal layer corresponding to each portion among all the color filters adjacent to each side, e.g. ex. , a portion in which the black matrices will be formed, in a size to cover the portion between the two adjacent color filters. Also, each spacer has an absorbance of 2 or more and a height of 0.5-10 μm. An LCD having the above structure is shown in FIG. 7. In FIG. 7, the reference numbers 71 and 71 'represent the transparent substrates, the reference number 72 represents the color filter layer, the reference numbers 73, 74 and 75 represent the red, green and blue filters, respectively, the number reference 76 represents the protective film, reference numbers 11 and 11 * represent the transparent electrodes, reference numerals 78 and 78 'represent the alignment layers, and reference numerals 79 represent the opaque spacers formed in the positions where the black matrices will be formed, respectively. As can be seen in FIG. 7, the opaque spacers are formed in the positions where the black matrices will be formed such that the opaque spacers act as a black matrix as well as a spacer. Therefore, there is no need to form extra black matrices. As well, the height of each opaque spacer formed by the above method is 0.5-10 μm which is higher than that of the conventional black matrix (1400 A), for the improved effect of preventing the mixing of colors and can be achieved by improving the high characteristics luminance A plasma screen panel (PDP) according to the present invention is made by the following method: First, two transparent substrates are prepared. A routing electrode and a dielectric layer are formed sequentially on one of the transparent substrates, and a transparent electrode, a collective conductive electrode and a dielectric layer are formed sequentially on the other transparent substrate, thereby resulting in the first and second substrates. Then, a donor film including a base film, a light absorbing layer and a transcription layer is placed separately from the dielectric layer of the first substrate at a predetermined distance. Then, a light source is irradiated on the donor film to transcribe a material that forms the wall of the barrier on the first substrate, and the second substrate is then stacked on the first substrate such that the faces of the dielectric layers of the first and second second substrate are against each other, thus completing the PDP. In the above processing method for the PDP of the present invention, the donor film has a structure in which the base film, the light absorbing layer and the transcription layer are stacked in sequence. In detail, the base film and the light absorption layer are the same as those described in the method of making the LCD, and the transcription layer could include a material that forms the wall of the barrier, such as alumina (Al -03) or glass powder. Also, as described above, a damping layer included between the light absorbing layer and the transcription layer could also be included. On the other hand, the light source used for the transcription is the same as that described in the method of making the LCD. Also, the method of making the PDP could also include the step of forming the walls of the multilayer barrier by repeating the transcription steps several times before the second substrate is stacked on the first substrate. As a result, the walls of the barrier having the projected height can be obtained. In the PDP obtained by means of the above steps, preferably, the height and width of each wall of the barrier are several hundred of 10 μm and 20-300 μm, respectively. The present invention provides the following advantages. First, in the LCD, the material forming the spacer having a predetermined height is transcribed in a projected position, so that the spacers do not agglomerate as in the conventional spacer deposition method, resulting in an even intermediate separation cell. Also, the two substrates are sealed by hardening the transcribed separators, so that an additional substrate sealing process is not required.

Also, there is no damage to the electrode by the spacers, presented during the conventional process of sealing the substrate under heat and pressure. Also, the material forming the spacer is hardened by light (or heat) and then fixed between the two substrates, so that damage to the alignment layer during injection of the liquid crystals, caused by the flow of the particles, can be prevented. spacers In the case of the color LCD, the opaque spacers function as a light protection as well as the conventional black matrix. In this way, an additional process is not required to form the black matrix. That is, in the method of manufacturing the LCD according to the present invention, the mixing of colors between pixels is prevented, providing high luminance characteristics by a simple processing process. As described above, the LCD and the method of making the same according to the present invention could be applied to the manufacture of FLCD, STN-LCD, TFT-LCD, TN-LCD and plastic LCD. In addition, in the case of the PDP, each wall of the barrier having uniform height and width is formed, the electric and optical blocking effect between adjacent cells, and the resolution are markedly improved, thereby improving the quality of presentation on an image screen. Also, the manufacturing method for PDP is simpler than the conventional method, and the inferiority ratio is also low.

Claims (19)

1. Claims 1. A liquid crystal display, characterized in that it includes first and second substrates in which a transparent substrate, a transparent electrode and an alignment layer are stacked sequentially, and a liquid crystal layer whose thickness is uniformly maintained by means of spacers formed between the alignment layers of the first and second substrates, wherein the height of each spacer and the spacing between two adjacent spacers are constant.
2. 2. A liquid crystal display as claimed in claim 1, characterized in that the height of each spacer is 0.5-10 μm.
3. 3. A liquid crystal display as claimed in claim 1, characterized in that the spacing between the two adjacent spacers is 10-1,000 μm.
4. A liquid crystal display as claimed in claim 1, characterized in that any of the first and second substrates includes a color filter layer formed of color filters R, V, A formed between the transparent substrate and the transparent electrode, and the opaque spacers and formed in the liquid crystal layer corresponding to each portion between all the adjacent color filters in a size such that it covers the portion between two adjacent color filters.
5. 5. A liquid crystal display as claimed in claim 4, characterized in that it also contains a protective film in the color filter layer.
6. 6. A liquid crystal display as claimed in claim 4, characterized in that the height of each spacer is 0.5-10 μm.
7. 7. A liquid crystal display as claimed in claim 4, characterized in that the absorbance of each spacer is 2 or more.
8. 8. A method for producing a liquid crystal display, characterized in that it comprises the steps of: (a) forming the first and second substrates in which the transparent substrates, the transparent electrodes and the alignment layers are stacked sequentially, respectively; (b) placing a donor film including a base film, a light absorbing layer and a transcription layer in a deferred position of the alignment layer of the first substrate by a predetermined distance; (c) transcription of the polymer forming the spacer of the transcription layer on the first substrate irradiating an energy source towards the base film of the donor film to form the spacers, each spacer has equal height and the spacing between two adjacent spacers is uniform; (d) stacking the second substrate on the first substrate wherein the spacers are transcribed to place the face of the alignment layers of the two substrates against each other; and (e) sealing the two substrates by stiffening the spacers by providing light or heat to at least one of the first and second substrates to fix the spacers between the alignment layers of the first and second substrates.
9. 9. A method for producing a liquid crystal display as claimed in claim 8, characterized in that the base film used in step (b) is at least one selected from the group consisting of polyethylene terephthalate (PET) and polycarbonate.
10. A method for producing a liquid crystal display as claimed in claim 8, characterized in that the polymer forming the spacer of the transcription layer is at least one selected from the group consisting of polyacryl, polyimide, polyvinyl alcohol ( PVA), polyvinylpyrrolidone (PVP), epoxy resin, phenol-formaldehyde resin and an unsaturated polyester resin.
11. 11. A method for producing a liquid crystal display as claimed in claim 8, characterized in that the energy source used in step (c) is at least one selected from the group consisting of a laser beam., xenon lamp, halogen lamp and thermal head.
12. 12. A method for producing a liquid crystal display as claimed in claim 8, characterized in that it further comprises the step of forming a color filter layer that includes red, green and blue filters in one of the two transparent substrates of stage (a) above.
13. A method for producing a liquid crystal display as claimed in claim 12, characterized in that it further comprises the step of forming a protective film in the color filter layer.
14. 14. A plasma screen panel, characterized in that it includes a first substrate in which a transparent substrate, a directing electrode and a dielectric layer are stacked in sequence, a second substrate in which a transparent electrode, a collective conductive electrode and a dielectric layer are stacked in sequence, and the walls of the barrier formed between the first and second substrates to separate the first and second substrates by a predetermined distance, wherein each wall of the barrier has uniform height and width.
15. 15. A plasma screen panel according to claim 14, characterized in that the height and width of each wall of the barrier are several hundred of 10 μm and 20-300 μm, respectively.
16. 16. A method for producing a plasma screen panel, characterized in that it comprises the steps of: (a) forming a first substrate in which a transparent substrate, a directing electrode and a dielectric layer are stacked in sequence; (b) forming a second substrate in which a transparent substrate, a transparent electrode, a collective conductive electrode and a dielectric layer are stacked in sequence; (c) placing a donor film including a base film, a light absorbing layer and a transcription layer in a position separated from the dielectric layer of the first substrate by a predetermined distance; (d) transcription of a material forming the barrier wall of the transcription layer on the first substrate by irradiation of a light source on the base film of the donor film to form the walls of the barrier, each wall of the barrier has uniform height and width; (e) stacking the second substrate on the first substrate to place the face of the dielectric layers of the two substrates against each other.
17. 17. A method for producing a plasma screen panel as claimed in claim 16, characterized in that the material forming the wall of the barrier is alumina or glass powder.
18. 18. A method for producing a plasma screen panel as claimed in claim 16, characterized in that it further comprises the step of forming the walls of the multilayer barrier by repeating steps (c) and (d) several times, between stages (d) and (e).
19. 19. A method for manufacturing a plasma screen panel as claimed in claim 16, characterized in that the light source used in step (d) is at least one selected from the group consisting of laser beam, lamp xenon, halogen lamp and thermal head.