JP2008091177A - Manufacturing method of spacer used for image display device, manufacturing method of image display device, and spacer forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a spacer capable of forming a spacer with high aspect ratio easily and with high precision, and capable of increasing use efficiency of a material, a manufacturing method of an image display device, and a spacer forming device. <P>SOLUTION: This is the manufacturing method of the spacer used for an image display device. A spacer forming material is injected from a dispenser 38 at a spacer forming position of a forming object, the dispenser is pulled up in a separation direction from the forming object in a state of contacting the injected spacer forming material, and the spacer forming material is extended to a prescribed height to form the spacer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spacer manufacturing method, an image display device manufacturing method, and a spacer forming apparatus used in an image display device having an envelope and a spacer disposed in the envelope.

  In recent years, as a lightweight and thin image display device, a liquid crystal display (hereinafter referred to as LCD) that controls the intensity of light using the orientation of liquid crystal, a plasma display panel (hereinafter referred to as LCD) that emits phosphors by ultraviolet rays of plasma discharge. (Referred to as PDP), field emission display (hereinafter referred to as FED) that emits a phosphor with an electron beam of a field emission electron emitter, and surface conduction electron that emits a phosphor with an electron beam of a surface conduction electron emitter. Emission element displays (hereinafter referred to as SEDs) have been developed.

  For example, the FED includes a first substrate and a second substrate that are arranged to face each other at a predetermined interval, and these substrates constitute a vacuum envelope by bonding peripheral portions to each other through a rectangular side wall. is doing. Three-color phosphor layers are formed on the inner surface of the first substrate, and a large number of electron-emitting devices are provided on the inner surface of the second substrate as electron emission sources that excite the phosphors to emit light.

In the FED as described above, it is important that the space between the first substrate and the second substrate, that is, the inside of the vacuum envelope, is maintained at a high degree of vacuum of about 10 ⁻⁴ Pa. When the degree of vacuum is low, the lifetime of the electron-emitting device, and hence the lifetime of the device, is reduced. Since the vacuum is between the first substrate and the second substrate, atmospheric pressure acts on the first substrate and the second substrate. Therefore, in order to support an atmospheric pressure load acting on these substrates and maintain a gap between the substrates, a large number of plate-like or columnar spacers are arranged between the two substrates.

  In order to dispose the spacers over the entire surfaces of the first substrate and the second substrate, an extremely thin plate or an extremely thin columnar shape is used so as not to contact the phosphor of the first substrate and the electron-emitting device of the second substrate. A spacer is required. At the same time, when considering thinning the first substrate and the second substrate, more spacers are required.

  For example, Patent Document 1 discloses an image display device including a large number of columnar spacers. As a method of forming and arranging a large number of independent columnar spacers, after the independent spacers are formed, each spacer is fixed between the phosphor layers of the substrate or between the electron-emitting devices using an adhesive such as frit glass. The method is used.

Alternatively, as another method, a method using a mold is provided. In this method, a mold having a large number of spacer forming holes is prepared, and the spacer forming holes are filled with a spacer forming material such as glass paste. Then, the molding die is aligned with and adhered to a desired substrate, the spacer forming material is cured, and then the mold is released to transfer the spacer onto the substrate. According to the above method, a large number of spacers can be formed and arranged at a time.
JP 2006-054151 A

  However, in the case of the former method, fixing a large number of spacers one by one on the substrate with an adhesive is not suitable for mass production and the manufacturing cost is also high. In addition, when an adhesive is used, there are problems such as spacer peeling that occurs in the thermal process during manufacturing, disturbance of the electric field due to the protrusion of the adhesive, contamination of the phosphor, and the like. Furthermore, it is difficult to ensure the strength as the spacer unless the spacer is ensured to be vertical.

  In the latter method, a large number of spacers can be aligned with respect to the substrate at the same time, but it is difficult to accurately form a spacer having a high aspect ratio due to insufficient release. Further, when filling the mold with the spacer forming material, the material is wasted and the use efficiency of the spacer forming material is lowered.

  The present invention has been made in view of the above points, and an object of the present invention is to manufacture a spacer capable of easily and accurately forming a spacer having a high aspect ratio and increasing the use efficiency of the material. A method, a manufacturing method of an image display device, and a spacer forming device are provided.

  In order to achieve the above object, a spacer manufacturing method according to an aspect of the present invention is characterized in that a spacer forming material is discharged from a dispenser to a spacer forming position of an object, and the dispenser is in contact with the discharged spacer forming material. The spacer is pulled up in a direction away from the object to be formed, and the spacer forming material is stretched to a predetermined height to form a spacer.

  According to another aspect of the present invention, there is provided a method of manufacturing an image display device, wherein a plurality of first substrates on which a display surface is formed and the first substrate are arranged to face each other with a predetermined gap therebetween and excite the display surface. A second substrate provided with a plurality of electron emission sources, and a plurality of envelopes provided between the first and second substrates and supporting an atmospheric pressure load acting on the first and second substrates. In a manufacturing method of an image display device comprising a spacer, a spacer forming material is discharged from a dispenser to a spacer forming position on a substrate, and the dispenser is separated from an object in contact with the discharged spacer forming material. The spacer is formed by pulling up in a direction and extending the spacer forming material to a predetermined height.

  A spacer forming apparatus according to another aspect of the present invention includes a support base for positioning and holding a substrate, a dispenser for discharging a spacer forming material, a spacer for the substrate held on the support base, which supports the dispenser movably. A movement mechanism for moving and positioning to a formation position; and a spacer formation material is discharged from the dispenser to a spacer formation position of the substrate, and the dispenser is brought into contact with the discharged spacer formation material by the head movement mechanism. And a controller that forms the spacer by pulling the spacer forming material up to a predetermined height.

  According to the aspect of the present invention, a spacer manufacturing method, an image display device manufacturing method, and a spacer manufacturing method capable of forming a spacer having a high aspect ratio easily and with high accuracy and increasing the use efficiency of the material, and A spacer forming apparatus can be provided.

A spacer manufacturing method, an image display device manufacturing method, and a spacer forming apparatus according to embodiments of the present invention will be described below with reference to the drawings.
First, an SED will be described as an example of a flat-type image display device having a spacer to be manufactured.

As shown in FIGS. 1 and 2, the SED includes a first substrate 11 and a second substrate 12 each made of a rectangular glass plate, and these substrates have a gap of about 1.0 to 3.0 mm. Opposed. The first substrate 11 and the second substrate 12 are flat rectangular shapes whose peripheral portions are bonded to each other through a rectangular frame-shaped side wall 13 made of glass, for example, and the inside is maintained at a high vacuum of about 10 ⁻⁴ Pa or less. A shape envelope 10 is formed. The side wall 13 functioning as a bonding member is sealed to the peripheral edge of the first substrate 11 and the peripheral edge of the second substrate 12 by a sealing material such as low melting glass or low melting metal, for example. It is joined.

  A phosphor screen 16 that functions as an image display surface is formed on the inner surface of the first substrate 11. The phosphor screen 16 includes phosphor layers R, G, and B that emit red, green, and blue light and a light shielding layer 17 that is formed between the phosphor layers. The phosphor layers R, G, and B are formed in a dot shape or a stripe shape. On the phosphor screen 16, for example, a metal back 20 mainly composed of aluminum is formed, and a getter film 22 is formed on the light shielding layer 17.

  On the inner surface of the second substrate 12, a number of surface-conduction electron-emitting elements 18 that emit electron beams are provided as electron emission sources for exciting the phosphor layers R, G, and B of the phosphor screen 16. ing. These electron-emitting devices 18 are arranged in a plurality of columns and a plurality of rows corresponding to the pixels. Each electron-emitting device 18 includes an electron emitting portion (not shown) and a pair of device electrodes for applying a voltage to the electron emitting portion. On the inner surface of the second substrate 12, a large number of wirings 21 for supplying a potential to the electron-emitting devices 18 are provided in a matrix shape, and end portions thereof are drawn out of the vacuum envelope 15.

  A plurality of columnar spacers 14 are provided inside the envelope 10 in order to support an atmospheric pressure load applied to the first substrate 11 and the second substrate 12. These spacers 14 are erected on the second substrate 12, for example. The plurality of spacers 14 are arranged at a predetermined pitch in the longitudinal direction and the width direction of the second substrate 12. In the present embodiment, each spacer 14 is erected on the wiring 21 between adjacent electron-emitting devices 18. Each spacer 14 is formed by directly adhering to the second substrate 12 by baking a vitreous spacer forming material mainly composed of glass as an insulating substance. The extended end of the spacer 14 is in contact with the first substrate 11 at a position overlapping the light shielding layer 17 of the phosphor screen 16. Thereby, the spacer 14 supports the atmospheric pressure load acting on the first and second substrates, and maintains the interval between the substrates at a predetermined value.

  In the SED, when displaying an image, the electron-emitting device 18 is driven to emit electrons, and an anode voltage of, for example, 10 kV is applied to the phosphor screen 16 and the metal back 20, and the electrons are emitted from the electron-emitting device 18. The electron beam is accelerated by the anode voltage and collides with the phosphor screen. As a result, the corresponding phosphor layers R, G, and B of the phosphor screen 16 are excited to emit light and display a color image.

Next, a spacer forming apparatus used for forming the above-described SED spacer will be described.
As shown in FIG. 3, the spacer forming apparatus includes a support base 40 having a flat placement surface 40a. On the mounting surface 40a of the support table 40, a flat rectangular plate-shaped support plate 42, a positioning mechanism 44 for positioning the object on which the spacer is formed on the support plate 42, and a spacer forming material on the object to be formed And a head moving mechanism 48 for moving and positioning the dispenser relative to the object to be formed.

  On the support plate 42, the second substrate 12 or the first substrate 11 to which the side wall 13 described above is sealed is placed as an object to be formed. The positioning mechanism 44 has, for example, three fixed positioning claws 50 that respectively contact two orthogonal sides of the second substrate 12 placed on the support plate 42 and the other two sides of the second substrate 12. Two presser claws 52 that are in contact with each other and elastically press the second substrate 12 toward the positioning claws 50.

  As shown in FIGS. 3 and 4, the dispenser 38 includes a discharge head 46 supported by a head moving mechanism 48. The discharge head 46 is provided around a syringe 54 as a reservoir for storing a spacer forming material, which will be described later, a nozzle 55 for discharging the spacer forming material sent from the syringe to a predetermined position of the second substrate 12, and the syringe 54. And a heater 56 for heating the spacer forming material to a desired temperature and maintaining the desired viscosity. The nozzle 55 has a discharge port with an inner diameter of 150 μm, for example. For example, a Peltier element is used as the heater 56. A discharge pump 70 that supplies compressed air is connected to the syringe 54 via a supply pipe 72.

  The spacer forming device includes an irradiation device 74 that irradiates the spacer forming material discharged from the nozzle 55 of the dispenser 38 with ultraviolet rays. The irradiation device 74 includes a light source 76 that supplies ultraviolet light, and a plurality of, for example, two optical fibers 78 that guide the ultraviolet light supplied from the light source to the vicinity of the nozzle 55. The optical fiber 78 is supported by the ejection head 46 and extends to the vicinity of the nozzle 55 of the ejection head 46. The emission ends 78 a of these optical fibers 78 are positioned toward the spacer forming material discharged from the nozzle 55. The emission ends 78a of the optical fibers 78 are located on both sides of the nozzle 55, and are arranged 180 degrees apart from each other with the nozzle 55 as the center.

As shown in FIG. 5, the head moving mechanism 48 has the ejection head 46 perpendicular to the placement surface 40 a of the support base 40, that is, perpendicular to the second substrate 12 placed on the support plate 42. A Z-axis drive robot 62 supported so as to be movable up and down along the Z-axis direction, and a Y-axis supported such that the Z-axis drive robot 62 can be driven back and forth along the Y-axis direction parallel to the short side of the second substrate 12. And an axis drive robot 64. Further, the Y-axis drive robot 64 is supported by an X-axis drive robot 66 and an auxiliary rail 67 fixed on the placement surface 40 a so as to be reciprocally driven along the X-axis direction parallel to the long side of the second substrate 12. Has been.
The spacer forming apparatus includes a controller 80 that controls operations of the discharge pump 70, the light source 76, the head moving mechanism 48, and the dispenser 38 as a control unit.

Next, a method for manufacturing a SED and a method for manufacturing a spacer using the spacer forming apparatus will be described.
First, the phosphor screen 16 is formed on the plate glass to be the first substrate 11. Subsequently, a metal back layer 20 made of an aluminum film or the like is deposited on the phosphor screen 16, and a getter film 22 is formed on the light shielding layer 17 of the phosphor screen 16. Next, as a sealing material, for example, a low-melting glass having a softening temperature of about 350 to 450 ° C. is applied in a rectangular frame shape along the outer periphery of the inner surface of the first substrate 11 to form a sealing layer. The low melting point glass is temporarily fired in the atmosphere to remove the organic solvent and the resin.

  On the other hand, the electron-emitting device 18 and the wiring 21 are formed on the plate glass for the second substrate 12. Next, a low-melting glass as a sealing material is applied in a rectangular frame shape along the inner periphery of the second substrate 12 to form a sealing layer. The second substrate 12 is temporarily fired in the atmosphere. Subsequently, after aligning the side wall 13 on the sealing layer, the temperature is raised to the crystal precipitation temperature of the low-melting glass in the atmosphere, and the side wall 13 is sealed to the second substrate 12 by maintaining the temperature. Thereafter, the electron-emitting device 18 is activated.

  Next, a columnar spacer 14 is formed on the wiring 21 of the second substrate 12 by a spacer forming apparatus. First, the second substrate 12 formed as described above is placed on the support plate 42 of the spacer forming apparatus with the electron-emitting device 18 side facing up, and is positioned at a predetermined position by the positioning mechanism 44. The syringe 54 of the discharge head 46 set at the initial position is filled with a spacer forming material in advance, and the bubbles are removed by a defoaming device.

  As the spacer forming material, a glass paste containing an ultraviolet curable binder and a glass filler having a glass particle diameter of 2 to 3 μm is used. The specific gravity and viscosity of the glass paste are appropriately selected. The controller 56 operates the heater 56 to maintain the spacer forming material 47 at a desired temperature, for example, 30 ° C., and to maintain a predetermined viscosity of 300 to 800 dPa · s, for example, about 600 dPa · s.

  Subsequently, the X-axis driving robot 66 and the Y-axis driving robot 64 of the head moving mechanism 48 move the ejection head 46 in the X direction and the Y direction, and move to a position facing the spacer formation position on the second substrate 12. , Positioning. Here, the ejection head 46 is positioned facing a predetermined position of the wiring 21. Next, as shown in FIGS. 4 and 5A, the discharge head 46 is lowered by the Z-axis drive robot 62, and the discharge end of the nozzle 55 faces the wiring 21 with a predetermined interval, for example, 100 μm. Position it to the state you want.

  In this state, 0.2 MPa of compressed air is supplied from the discharge pump 70 to the syringe 54, and the glass paste 82 is discharged from the nozzle 55 onto the wiring 21 for 0.02 seconds. Each time the glass paste 82 is discharged once, the nozzle 55 is raised by a predetermined distance by the Z-axis drive robot 62, and the discharged glass paste 82 is extended. That is, the nozzle 55 is moved in a direction away from the second substrate along a direction perpendicular to the surface of the second substrate 12. The pulling speed of the nozzle 55 is, for example, 50 to 100 mm / s. As shown in FIGS. 5A to 5D, for example, the nozzle 55 is raised by 150 μm after each discharge, and the distance between the tip of the nozzle 55 and the wiring 21 is changed to 250 μm and 400 μm. Repeat the discharge and pull up. During this time, the discharge of the glass paste 82 is intermittently performed at the same place, and the glass paste and the nozzle 55 are always in contact with each other. The amount of one rise of the nozzle 55 is set to about 50 to 500 μm.

  After sequentially laminating and stretching the glass paste 82 as described above, as shown in FIG. 5D, for example, 2000 mJ of ultraviolet light is emitted from the light source 76, and the glass paste 82 is emitted from the emission end 78 a of the optical fiber 78. Irradiate ultraviolet rays. By this UV irradiation, the glass paste 82 discharged from the nozzle 55 is UV cured. It is desirable to irradiate the entire glass paste 82 with UV rays as uniformly as possible.

After the glass paste 82 is cured with ultraviolet rays to form a spacer body, the nozzle 55 is pulled up by the head moving mechanism 48 and the tip of the nozzle is separated from the spacer body. At this time, the distance from the tip of the spacer body to the surface of the second substrate 12, here, the wiring 21 was 1450 μm.
Subsequently, the ejection head 46 is sequentially moved to another spacer formation position on the second substrate 12 by the head moving mechanism 48, and a spacer body is sequentially formed by the same process as described above.

After forming a desired number of spacer bodies on the second substrate 12, the second substrate 12 is passed through a drying path at 90 ° C. to thermally cure the spacer bodies. Subsequently, the second substrate 12 on which the spacer body is formed is heat-treated in a heating furnace, the binder is blown from the spacer forming material, and then the spacer body is baked at about 500 to 550 ° C. for 30 minutes to 1 hour. Vitrify. Thereby, the spacer 14 is formed. Each spacer 14 is directly fixed to the wiring of the second substrate 12 by the adhesive force of the spacer forming material itself, and is integrally formed with the second substrate. Since the binder is removed in vitrification, the height of the formed spacer 14 contracts to about 80% after thermosetting.
By the above method, a cylindrical spacer 14 having a diameter of about 250 μm and a height of about 1160 μm could be formed.

  Subsequently, the second substrate 12 on which the plurality of spacers 14 are erected as described above, and the first substrate 11 are arranged to face each other, and the peripheral portions of these substrates are sealed together. In the present embodiment, the first substrate 11 and the second substrate 12 are aligned with each other, and placed in a heating furnace (not shown) in a state of being opposed to each other with a certain gap. Then, the first substrate 11 and the second substrate 12 are heated to about 450 ° C. By heating, melting of the low melting point glass previously applied starts. For example, the temperature is maintained at about 450 ° C. in an argon atmosphere over 30 minutes, and the low melting glass melts and crystal precipitation begins. Thereafter, crystal precipitation of the low melting point glass is almost completed, and the first substrate 11 and the second substrate 12 are sealed to each other via the side wall 13 by the low melting point glass.

  Subsequently, the temperature in the heating furnace is maintained at 400 to 450 ° C., and the first substrate 11 and the second substrate 12 are baked for about 1 hour. As a result, undesired gas components adsorbed on the first substrate 11, the second substrate 12, the phosphor screen, and the electron-emitting device are released to perform degassing. In order to prevent oxidation of the electron-emitting device, it is desirable to seal and bake the inside of the heating furnace in an inert atmosphere and a reducing atmosphere. The atmosphere can be selected according to time and temperature.

  During degassing by baking, the inside of the envelope 10 is exhausted through an exhaust hole (not shown) by an exhaust pump. As a result, gas components desorbed from the substrate, the phosphor screen, and the like are discharged from the envelope 10 to the outside, and the inside of the envelope 10 is in a clean vacuum state.

When the degree of vacuum inside the envelope 10 becomes, for example, 1 × 10 ⁻³ Pa or less, the first substrate 11 and the second substrate 12 are heated at about 350 to 400 ° C. for a predetermined time, for example, 2 hours. Activate the getter film. Thereafter, the temperature of the envelope 10 is lowered to a desired temperature, and the exhaust hole 29 of the envelope 10 is hermetically sealed. Next, the envelope 10 is removed from the heating furnace. The SED envelope 10 is completed through the above steps.

  According to the spacer manufacturing method, SED manufacturing method, and spacer forming apparatus configured as described above, a spacer can be formed directly on a substrate, and a spacer having a high aspect ratio can be formed relatively easily. Can do. In the spacer formation by the dispenser, it is not necessary to align with the adhesive application position, and the nozzle is pulled up perpendicularly to the substrate, so that the verticality of the spacer can be maintained. In addition, the use efficiency of the spacer forming material is high and the waste of the material can be greatly reduced as compared with a method using a mold or a forming method by printing. Furthermore, the spacer forming position can be easily set and changed, and a repair work can be easily performed when the spacer cannot be formed.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  In the above-described embodiment, the spacer forming material is discharged from the dispenser in a plurality of times, and the nozzle is lifted after each discharge. However, the number of discharges and the number of pulls are not limited to 10 and can be arbitrarily increased or decreased. is there. For example, as shown in FIG. 6, in a state where the nozzle 55 is separated from the second substrate 12 by a predetermined distance, a glass paste 82 as a spacer forming material is discharged onto the second substrate 12, and after discharging, the nozzle is formed once. It is good also as a structure which raises 55 to predetermined spacer height and forms a spacer.

In addition, the shape of the spacer, the material of the spacer forming material, and the like are not limited to the above-described embodiment, and can be appropriately selected as necessary. The discharge condition of the spacer forming material, the ultraviolet irradiation condition, and the nozzle lifting speed are not limited to the above-described embodiment, and can be changed as necessary. In the above-described embodiment, the spacer 14 is formed on the second substrate. However, the spacer 14 may be formed on the first substrate. The formation object of the spacer is not limited to the glass substrate described above,
Various structures formed of a material resistant to firing such as metal and ceramic can be used. In the spacer forming apparatus, a plurality of dispenser ejection heads may be provided, and a plurality of spacers may be formed simultaneously.

  The present invention is not limited to one using a surface conduction electron-emitting device as an electron source, but can also be applied to an image display apparatus using another electron source such as a field emission type or a carbon nanotube.

The perspective view which fractures | ruptures and shows SED which concerns on embodiment of this invention partially. The perspective view of said SED fractured | ruptured along line AA of FIG. The perspective view which shows the spacer formation apparatus which concerns on embodiment of this invention. The front view which shows schematically the board | substrate used as the discharge nozzle and spacer formation object of the said spacer formation apparatus. Schematic which shows the formation process of the spacer by the said spacer formation apparatus. Schematic which shows the formation process of the spacer by the said spacer formation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Envelope 11 ... 1st board | substrate 12 ... 2nd board | substrate 13 ... Side wall,
14 ... spacer, 16 ... phosphor screen, 17 ... metal back layer,
18 ... electron-emitting device, 38 ... dispenser, 46 ... discharge head,
48 ... Head moving mechanism, 54 ... Syringe, 55 ... Nozzle, 56 ... Heater,
76 ... Light source, 78 ... Optical fiber, 80 ... Controller

Claims (14)

A method of manufacturing a spacer used in an image display device,
Discharge the spacer forming material from the dispenser to the spacer forming position of the object,
A method for manufacturing a spacer, wherein the spacer is formed by pulling up the dispenser in a direction away from an object to be formed while being in contact with the discharged spacer forming material, and extending the spacer forming material to a predetermined height.   The method of manufacturing a spacer according to claim 1, wherein the discharging of the spacer forming material and the lifting of the dispenser are repeated a plurality of times at the spacer forming position, and the spacer forming material is stretched to a predetermined height while being stacked.   The method of manufacturing a spacer according to claim 1, wherein the dispenser is continuously pulled up to a predetermined height in a state in contact with the discharged spacer forming material, and the spacer forming material is extended to a predetermined height.   The manufacturing method of the spacer of Claim 1 which sets the viscosity at the time of discharge of the said glass paste to 300-800 dPa * s.   Using an ultraviolet curable glass paste as the spacer forming material, extending the spacer forming material to a predetermined height, irradiating the spacer forming material with ultraviolet rays, and curing the spacer forming material with ultraviolet rays, The method of manufacturing a spacer according to claim 1, wherein the dispenser is separated from the cured spacer forming material.   The method for manufacturing a spacer according to claim 5, wherein after the dispenser is cut off, the cured spacer forming material is baked and vitrified. A first substrate on which a display surface is formed; and a second substrate disposed opposite to the first substrate with a predetermined gap and provided with a plurality of electron emission sources for exciting the display surface. In a method of manufacturing an image display device, comprising: an envelope; and a plurality of spacers provided between the first and second substrates and supporting an atmospheric pressure load acting on the first and second substrates.
The spacer forming material is discharged from the dispenser to the spacer forming position on the substrate,
A manufacturing method of an image display device, wherein a spacer is formed by pulling up the dispenser in a direction away from an object to be formed while being in contact with the discharged spacer forming material, and extending the spacer forming material to a predetermined height.   The method for manufacturing an image display device according to claim 7, wherein the discharge of the spacer forming material and the lifting of the dispenser are repeated a plurality of times at the spacer forming position, and the spacer forming material is stretched to a predetermined height while being stacked.   9. The image display device according to claim 8, wherein the dispenser is continuously pulled up to a predetermined height in a state in contact with the discharged spacer forming material, and the spacer forming material is extended to a predetermined height. Method.   Using an ultraviolet curable glass paste as the spacer forming material, extending the spacer forming material to a predetermined height, irradiating the spacer forming material with ultraviolet rays, and curing the spacer forming material with ultraviolet rays, The method for manufacturing an image display device according to claim 7, wherein the dispenser is separated from the cured spacer forming material.   The manufacturing method of the image display apparatus of Claim 10 which maintains the viscosity of the glass paste at the time of the said discharge at 300-800 dPa * s. A spacer forming device for forming a spacer used in an image display device,
A support base for positioning and holding the substrate;
A dispenser for discharging the spacer forming material;
A movement mechanism that movably supports the dispenser and moves and positions the spacer on a substrate held on a support base; and
The spacer forming material is discharged from the dispenser to the spacer forming position of the substrate, and the dispenser is pulled up in the direction away from the substrate by the head moving mechanism in contact with the discharged spacer forming material, and the spacer forming material is removed. A control unit that extends to a predetermined height to form a spacer;
A spacer forming apparatus.   The spacer formation apparatus of Claim 12 provided with the irradiation apparatus which irradiates an ultraviolet-ray to the said spacer formation material discharged from the said dispenser, and hardens | cures an ultraviolet-ray.   The dispenser includes a discharge head supported movably by the moving function, the discharge head storing a spacer for storing the spacer forming material, a nozzle extending from the storage and having a discharge port, The spacer formation apparatus of Claim 11 or 12 provided with the heater which heats the said storage part and maintains the said spacer formation material to predetermined | prescribed viscosity.

Images