JPH07299403A - Coating applicator and image forming device produced by using the same - Google Patents

Abstract

PURPOSE:To realize coating applicator with excellent reproducibility and uniformity by providing a coating applying device for applying a pasty material on a member to be coated by relatively moving a dispenser and a stage with >=1 local heating mechanisms for drying and solidifying the applied pasty material. CONSTITUTION:The front surface plate or rear surface plate of an image forming device arranged with a spacer as the member 4 to be coated right under the dispenser 3 having a needle 2 for discharging frit 1 which is the pasty material is set on a stage 5. This stage 5 is driven in X-Y-Z directions by a stage driving mechanism 6, by which the frit 1 is applied at the suitable point. In such a case, an ultrasonic vibrating mechanism 7 constituting the local heating mechanism is disposed in the frit 1 within the dispenser 3. The frit 1 is vibrated by ultrasonic waves to prevent clogging when the application with the dispenser 3 is not executed. The ultrasonic waves are stopped and the frit 1 is applied on the member uniformly in the prescribed patterns with good reproducibility at the time of application.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for applying a paste-like material such as a frit glass mixture, and a flat type image forming apparatus for applying an electron source to form an image. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, two types of electron emitters, a thermoelectron source and a cold cathode electron source, are known. Among them, the cold cathode electron source includes a field emission type (hereinafter abbreviated as “FE type”), a metal / insulating layer / metal type (hereinafter abbreviated as “MIM type”), a surface conduction type electron emitting device, and the like.

As an example of the FE type, WPDyke & WWDol
an, "Field emission", Advance in Electron Physics, 8,
89 (1956) and CASpindt, "Physical properties of thin-
film field emission cathodes with molybdenum cone
s ", J. Appl. Phys., 47, 5248 (1976) and the like.

As an example of the MIM type, CAMead, "The tu
nnel-emission amplifier ", J.Appl.Phys., 32,646 (1961)
Etc. are known.

Examples of surface conduction electron-emitting devices include E.
I. Elinson, Radio Eng. Electron Phys., 10, 1290 (1965).

The surface conduction electron-emitting device utilizes a phenomenon in which electron emission occurs when a current is passed through a thin film of a small area formed on a substrate in parallel with the film surface.

As the surface conduction electron-emitting device, one using the SnO ₂ thin film by Erinson et al.
By thin film [G.Dittmer: "Thin Solid Films", 9,31
7, (1972)], In ₂ O ₃ / SnO ₂ thin film [M.Ha
rtwell and CGFonstad: "IEEE Trans. ED Conf.", 519,
(1975)], a carbon thin film [Hiraki Araki et al .: "Vacuum", Vol. 26, No. 1, p. 22 (1983)] and the like.

[0008]

FIG. 9 shows an image forming apparatus for forming an image by applying the above-mentioned electron-emitting device.
And it demonstrates based on FIG.

FIG. 9 is an exploded perspective view for explaining the structure of a conventional image forming apparatus, and FIG. 10 is a vertical sectional view of the image forming apparatus shown in FIG.

The image forming apparatus is generally shown in FIGS. 9 and 10.
As shown in FIG.
And a front plate 102, which is arranged opposite to the rear plate 103 and has an image forming member on which an image is formed by irradiation of an electron beam from an electron-emitting device group, the front plate 102 and the rear plate 103.
And a support frame 104 for supporting the peripheral edges of the front plate 102 and the rear plate 103 so as to surround the electron-emitting device group, and the front plate 102 and the rear plate 103.
The joint portion of the support frame 104 is fixed by frit glass.

Further, the inside of the image forming apparatus is 10 ⁻⁶ To
Since the electron-emitting device is operated in a vacuum of about rr or higher, it is necessary to have a structure that can withstand the atmospheric pressure at this time.

In particular, in a flat image forming apparatus using a large-area back plate and front plate, when the atmospheric pressure applied perpendicularly to the surfaces of the front plate and the back plate is to be supported, each plate is thickened. Therefore, the feasibility becomes poor in terms of weight and cost. Therefore, by disposing the spacer 101 as a support between the front plate 102 and the rear plate 103 inside the support frame 104, the atmospheric pressure resistant structure and the weight reduction are achieved.

The spacer 103 is a back plate 103.
It also has a function of accurately maintaining the distance between the electron-emitting device group formed in the above and the image forming member of the front plate 102 at the position facing the electron-emitting device group.

As described above, frit glass is used as a bonding material when airtightly bonding the front plate 102 and the rear plate 103 via the support frame 104.
Heat fusion is performed at 0 ° C to 550 ° C. For that reason,
The adhesive agent for fixing the spacer 103 arranged in the image forming apparatus is also required to have heat resistance capable of withstanding the temperature at the time of joining, and further, in the image forming apparatus in which the spacer 103 is arranged, as described above, ^It is necessary to maintain a vacuum of about ^-6 Torr or more, and the adhesive for fixing the spacer 103 is also required to have a characteristic that the outgas in the vacuum is as small as possible. Frit glass, which is a bonding material, can be used as an adhesive for the spacer 103 that satisfies the above conditions.

There are several types of frit glass, such as crystalline ones and amorphous ones, depending on the difference in the components, and they can be appropriately selected according to the temperature at the time of joining and the expansion coefficient of the members used. The frit glass simple substance is a powder, so when applying it, it is mixed with an organic solvent or an organic solvent whose viscosity is adjusted with a binder such as nitrocellulose or acrylic to form a paste-like frit glass mixture,
In consideration of workability during coating, a material that has viscosity at room temperature and is not quick-drying is actually used. The viscosity of this frit glass mixture (hereinafter referred to as "frit") at room temperature is about tens of thousands of cps although it varies depending on the coating conditions.

Further, as described above, the spacer 103
In the image forming apparatus, a thin spacer 103 having a width of several hundreds of μm is provided at a position in the front plate 102 and the rear plate 103 that does not interfere with the fluorescent screen and the electron source.
It is necessary to arrange them with a high accuracy of around μm, and for that purpose, the coating width of the frit for fixing the spacer 103 must be as thin as the spacer width, and the positional accuracy must also be increased with high accuracy. Also, the frit is spacer 1
In order to fix 03 with sufficient mechanical strength, it is desirable that the frit height is not less than the width.

A method for applying such a frit having a width of several hundreds of μm and an aspect ratio of 1 or more with high positional accuracy is as follows: a dispenser for ejecting the frit from a needle, and a position between the ejection portion and the member to be coated. It is possible to apply a dispenser robot that is combined with a robot that relatively accurately moves and controls the three-dimensional direction.

The dispenser robot is industrially widely used as a coating device for various paste materials such as cream solder, and is also commercially available.

However, in the case of applying the frit with the dispenser, the frit to be ejected is often in a paste state which has a viscosity of about tens of thousands cps at room temperature and is not quick-drying as described above, and the frit does not immediately solidify on the surface to be coated, and thus the frit is not solidified. Is drooping and widening, and the height is less than half the width. Therefore, it is impossible to obtain a height higher than the width by only one coating, and therefore multiple coatings must be performed. In this case, the frit is dried and solidified each time it is applied, which causes the following problems. (1) Since the entire member to be coated is heated to dry and solidify,
A drying oven in which the member to be coated is placed is required. (2) A heating step of 120 to 130 ° C. for 5 to 10 minutes in a drying furnace and a cooling step of 15 to 25 minutes from the time when the material is taken out of the oven to the time when the entire member to be coated cools are required. There are many wastes because the work cannot be done and the work time is prolonged. (3) Since it is necessary to remove the coated member that has been aligned with high precision on the stage of the coating device each time it is dried, and to set it again during the next overcoating,
Not only the work is complicated, but also the frit position accuracy is affected. (4) When removing the coated object from the coating device or moving it to the drying oven, there is a risk that the undried frit may be peeled off or the member itself may be damaged due to poor handling. .

As described above, in order to obtain a desired frit, a series of wasteful and time-consuming coating and drying operations as described above must be repeated 3 to 5 times, which is a very big problem. was there.

Further, since the frit to be discharged contains a glass component having a particle size of several hundreds of μm or less and the diameter of the discharge tip of the needle is about several hundreds μm, the frit aggregates and becomes clogged at the tip of the needle or inside. As a result, the frit is not ejected at the time of application, or the frit is not ejected during application and the ejection pattern is stepped, resulting in poor reproducibility and uniformity.

Therefore, in view of the above-mentioned problems of the prior art, the present invention does not interrupt the work of a series of coating to drying, which has been wasteful and time-consuming in the prior art, on the same apparatus, without interruption. It is a first object of the present invention to provide an efficient coating apparatus which can ensure coating accuracy and can be continuously performed, and an image forming apparatus manufactured using the coating apparatus.

Further, in view of the above-mentioned problems of the prior art, the present invention provides a coating apparatus for frit glass mixture or the like, which has less clogging, and has good reproducibility and uniformity, and an image forming apparatus manufactured using the coating apparatus. The second purpose is to provide.

[0024]

The present invention for achieving the above object comprises a dispenser for discharging a paste-like material and a stage for holding a member to be coated, and the dispenser and the stage are opposed to each other. In the coating device for moving the paste-like material onto the coating target member in a desired manner, one or more local heating mechanisms for drying and solidifying the paste-like material coating the coating target member are provided. Characterize.

In the above coating apparatus, the local heating mechanism may be spot-shaped or line-shaped.

Further, the dispenser is provided with a stirring mechanism for stirring the pasty material, the dispenser is further provided with an ultrasonic vibration mechanism for ultrasonically vibrating the pasty material, and the local heating mechanism is used. Instead, it is preferable to provide an ultrasonic vibration mechanism for ultrasonically vibrating the paste material.

The ultrasonic vibration mechanism may be provided inside the dispenser so as to come into contact with the paste-like material, or may be provided outside the dispenser.

In such a coating apparatus, the pasty material is preferably a frit glass mixture, and an image forming apparatus manufactured using such a coating apparatus using the frit glass mixture also belongs to the present invention.

[0029]

In the present invention configured as described above, the frit glass mixture which is a paste-like material is applied to the member to be coated, and immediately after that, the frit glass mixture is dried by the local heating mechanism provided in the same device. It becomes possible to solidify.

This eliminates the need for a drying oven for drying and solidifying. In addition, since the frit itself is directly dried and solidified in a short time because of the local heating mechanism, the entire member to be coated is not heated and the cooling step can be substantially omitted.

Since the drying operation is performed on the coating device, the coating can be successively performed without removing the member to be coated whose position is adjusted with high precision, and the automation can be achieved while ensuring the frit position accuracy. .

Further, since the member to be coated is not removed from the coating apparatus or moved to the drying oven, there is no risk of peeling the undried frit or damaging the member itself. .

In addition, the ultrasonic vibrating mechanism and the stirring mechanism allow the coating to be performed without causing clogging of the frit glass itself in the dispenser and causing clogging.

[0034]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a schematic structural view showing a first embodiment of the coating apparatus of the present invention.

In the coating apparatus of this embodiment, as shown in FIG. 1, a stage 5 for holding the member to be coated 4 in a horizontal plane (in the XY plane in the figure) and a stage 5 is moved in a three-dimensional direction in the horizontal plane. A stage drive mechanism 6 for controlling the stage drive mechanism 6, a drive control unit 8 for controlling the stage drive mechanism 6, and a needle 2 serving as a discharge port that is fixed above the stage 5 so as to face the member 4 to be coated. The dispenser 3 filled with the frit 1 which is, the air hose 9 fixed to the upper end of the dispenser 3 and sending air into the container of the dispenser 3, and the air sent through the air hose 9 are discharged from the needle 2. The dispenser controller 10 for controlling the amount of the frit 1 to be disposed and the frit 1 inside the dispenser 3 are arranged to apply ultrasonic vibration to the frit 1. The ultrasonic vibrating mechanism 7 is provided, an ultrasonic wave generating power source 11 for generating ultrasonic waves in the ultrasonic vibrating mechanism 7, and a computer 12 for centrally controlling operations such as driving and ultrasonic vibration. .

Next, referring to FIGS. 1, 9 and 10,
The operation of the coating apparatus having the above structure will be described.

In FIG. 1, in front of an image forming apparatus in which a spacer as shown in FIG. 9 and FIG. 10 is disposed as a member to be coated 4 just below a dispenser 3 equipped with a needle 2 for ejecting a frit 1. A face plate or a back plate is set on the stage 5. This stage 5
Can be freely driven in the XYZ directions in the figure by the stage drive mechanism 6, and the frit 1 discharged from the needle 2 can be applied onto the member 4 to be coated in an arbitrary pattern. The stage drive mechanism 6 is controlled by the drive controller 8, and the frit 1 is discharged by the dispenser 3 by controlling the supply of air pressure from the air hose 9 by the dispenser controller 10.

In the frit 1 inside the dispenser 3, an ultrasonic vibration mechanism 7 for vibrating the frit 1 by ultrasonic waves is used.
When the dispenser 3 is not applied, the frit 1 is vibrated by ultrasonic waves to prevent clogging, and when applying, the ultrasonic wave is stopped and the frit 1 is applied, so that the pattern Could be formed uniformly and with good reproducibility.

Further, the operations of frit application, stage drive, and ultrasonic application of frit described above can be automated by centrally controlling the dispenser controller 10, the drive control unit 8, and the ultrasonic power source 11 with the computer 12. Becomes

In the above structure, the dispenser 3 is not limited to the air type, but may be a mechanical type such as driving a piston in a syringe by a driving means combining a ball screw and a motor. It may be selected appropriately.

The position of the ultrasonic vibrating mechanism 7 may be the upper part, the middle part, or the needle in the container of the dispenser 3 as long as it contacts the frit and vibrates the frit.

Further, the same effect can be obtained not only when the ultrasonic wave is applied by the dispenser but also when the frit is applied by the dispenser.

In this embodiment, the frit glass mixture was vibrated by using ultrasonic waves, but the present invention is not limited to this.
It is only necessary to prevent the frit glass itself from aggregating and solidifying in the dispenser. For example, instead of the ultrasonic vibration mechanism, a stirring mechanism combining a motor and a screw may be provided.

(Second Embodiment) FIG. 2 is a perspective view showing the structure of a second embodiment of the coating apparatus of the present invention. Figure 3
It is a partially expanded view of the coating device shown in FIG.

As shown in FIGS. 2 and 3, the coating apparatus of the present embodiment has a stage 21 for holding the member 22 to be coated in a horizontal plane (in the XY plane in the figure) and one end surface of the stage 21 in the figure. X-axis drive linear slide 23 arranged in the X direction
A Y-axis drive linear slide 24, one end of which is fixed to the X-axis drive linear slide 23 and extends in the Y direction in the drawing,
Z-axis drive mechanism 2 fixed to the axis-drive linear slide 24
5, a dispenser 26 fixed to the Z-axis drive mechanism 25 so that the needle 2 serving as a discharge port is directed toward the coating target member 4, and a frit 31 is filled in the container, and an X-axis drive linear slide 25 for the dispenser 3. , A Y-axis drive linear slide 24 and a Z-axis drive mechanism 25, and an air hose 28 for sending air into the container of the dispenser 26, and a frit 31 discharged from a needle 32 by adjusting the air sent through the air hose 28. A dispenser controller 29 for controlling the amount of liquid, an ultrasonic vibrating mechanism 27 arranged outside the container of the dispenser 26 for applying ultrasonic vibration to the frit 31, and a computer 30 for centrally controlling the operation such as driving and ultrasonic vibration.
It consists of and.

Next, with reference to FIGS. 2, 3, 9 and 10, the operation of the coating apparatus having the above construction will be described.

In FIGS. 2 and 3, an image is formed in which a spacer as shown in FIG. 9 and FIG. 10 is disposed as a member 22 to be coated just below a dispenser 26 equipped with a needle 32 for ejecting a frit 31. The front plate or the back plate of the device is set on the stage 21. The stage 21 is fixed, and the dispenser 26 can be freely driven in the XYZ directions in the drawing by the X-axis drive linear slide 23, the Y-axis drive linear slide 24, and the Z-axis drive mechanism 25, and the frit 31 discharged from the needle 32. Can be applied in any pattern on the member 22 to be coated. The XYZ axis drive mechanism is controlled by a drive control unit incorporated in the apparatus, and the discharge of the frit 31 is performed by the dispenser 26 controlling the supply of air pressure from the air hose 28 by the dispenser controller 29.

An ultrasonic vibrating mechanism 27 for vibrating the frit 31 with ultrasonic waves is installed outside the container of the dispenser 26. While the dispenser 26 is not applying the ultrasonic vibrating mechanism 27, the frit 31 is vibrated by ultrasonic waves. By preventing clogging and stopping the ultrasonic wave and applying the frit at the time of application, the pattern could be formed uniformly and with good reproducibility.

Further, in the operations of frit application, stage drive, and ultrasonic application of frit described above, the computer 30 centrally controls the dispenser controller 12, the drive control unit and the ultrasonic power source incorporated in the apparatus. By doing so, automation becomes possible.

In the above structure, the dispenser is not limited to the air type, but may be a mechanical type such as driving a piston in a syringe by a driving means combining a ball screw and a motor. Just select it.

The position of the ultrasonic vibrating mechanism 27 is not limited to the outside of the dispenser 26 container as long as the frit 31 vibrates ultrasonically, but may be inside. In addition, the connection part 3 between the needle and the container is provided outside the dispenser 26 container.
A value of 3 is more effective.

In this embodiment, the frit glass mixture was vibrated by using ultrasonic waves, but the present invention is not limited to this.
It is only necessary to prevent the frit glass itself from aggregating and solidifying in the dispenser. For example, instead of the ultrasonic vibration mechanism, a stirring mechanism combining a motor and a screw may be provided.

(Third Embodiment) FIG. 4 is a schematic constitutional view showing a third embodiment of the coating apparatus of the present invention.

In the coating apparatus of this embodiment, as shown in FIG. 4, a stage 46 for holding the member 45 to be coated in a horizontal plane (in the XY plane in the figure) and a stage 46 moved in a three-dimensional direction in the horizontal plane. The stage drive mechanism 47, the drive controller 48 for controlling the stage drive mechanism 47, and the stage 4
6, a needle 42 serving as a discharge port is provided above the member 6
And a dispenser 43 that is fixed so that the frit 41 is filled in the container,
And a dispenser 4 which is attached to the stirrer 44 for stirring the frit 41 to prevent the frit 41 from aggregating.
An air hose 52 that is fixed to the upper end of 3 and sends air into the container of the dispenser 43, and a dispenser controller 53 that controls the amount of the frit 41 discharged from the needle 42 by adjusting the air sent through the air hose 52, A local heating mechanism 49 for guiding heat to the frit 41 immediately after being coated on the member 45 to be coated, a heat source 50 for generating heat to be guided to the local heating mechanism 49, and a heating power source 51 connected to the heat source 50. And a computer 54 that centrally controls operations such as driving, coating, and heating.

Next, referring to FIGS. 4, 9 and 10,
The operation of the coating apparatus having the above structure will be described.

In FIG. 4, just below a dispenser 43 having a needle 42 for discharging a frit 41,
As the coated member 45, the front plate or the rear plate of the image forming apparatus in which the spacers shown in FIGS. 9 and 10 are arranged is set on the stage 46. The frit 41 in the dispenser 43 is agitated by the agitation mechanism 44 to prevent the frit 41 from aggregating, if necessary.

The stage 46 can be freely driven in the XYZ directions in the figure by the stage drive mechanism 47, and the frit 41 discharged from the needle 42 can be applied on the member 45 to be coated in an arbitrary pattern. The stage drive mechanism 47 is controlled by the drive control unit 48, and the frit 41 is discharged by the dispenser 43 controlling the supply of air pressure from the air hose 52 by the dispenser controller 53.

A heat source 50 is provided near the dispenser 43.
A local heating mechanism 49 for guiding the heat generated by the applied frit 41 to the applied frit 41 is installed. The local heating mechanism 49 quickly dries the frit 41 immediately after being applied by the dispenser 43 on the same device. Can be solidified. The heat source 50 is driven by a heating power source 51. As a specific heating means for these, a xenon lamp is used as the heat source 5.
When the local heating mechanism 49 is set to 0 and the glass fiber constitutes the local heating mechanism 49, heating can be performed in a spot shape. Also,
This heating does not raise the temperature of the entire member to be coated.

Regarding overcoating, the drying and solidification of the frit 41 is completed almost at the same time as the application, and the member 45 to be coated need not be cooled, so that overcoating can be continuously performed.

Further, the operations of frit coating, stage drive, and frit heating described above are performed by centrally controlling the dispenser controller 53, the drive control unit 48, and the heating power source 51 by the computer 54, so that coating-drying-overcoating can be performed. A series of repetitive work can be automated.

In the above structure, the dispenser 43 and the local heating mechanism 49 side are fixed and the stage is driven, but conversely, the stage side is fixed and the dispenser 43 is fixed.
Also, it does not matter whether the local heating mechanism 49 side is three-dimensionally driven, the stage fixing can cope with a larger member to be coated, and the stage side driving and the dispenser and local heating mechanism side driving are used in combination. There is no problem at all, and the driving method may be appropriately selected in consideration of various conditions such as the size of the member to be coated.

The stirring mechanism may be applied when the paste components in the dispenser are severely separated, and any type such as a screw type may be used. Of course, the ultrasonic vibration mechanism described in the first and second embodiments may be provided.

Further, if there is a large time difference between the coating speed and the drying speed, the dispenser and the local heating mechanism can be driven independently so that the coating and the drying can be performed separately, and various frit coatings and dryings can be performed. And can respond flexibly.

The heating means is not limited to the spot heating by the combination of the above-mentioned "xenon lamp + glass fiber", and a hot air combining a heater and a fan is locally applied or a laser is used. Spot heating method such as, and infrared or halogen lamp single or multiple irradiation may be used to heat in a line, and any spot-shaped or line-shaped local heating method that does not heat the entire coated member is applied. it can.

From the above description, a fourth embodiment shows an apparatus in which the stage fixing / dispenser drive, the dispenser and the local heating mechanism are driven independently, and the local heating is performed in line.

(Fourth Embodiment) FIG. 5 is a perspective view showing the structure of a fourth embodiment of the coating apparatus of the present invention. Figure 6
It is a partially expanded view of the coating device shown in FIG.

As shown in FIGS. 5 and 6, the coating apparatus of the present embodiment has a stage 63 for holding the member 62 to be coated in a horizontal plane (in the XY plane in the figure), and one end surface of the stage 63 in the figure. X-axis drive linear slide 64 arranged in the X direction
A Y-axis drive linear slide 65 whose one end is fixed to the X-axis drive linear slide 64 and extends in the Y direction in the drawing,
Z-axis drive mechanism 6 fixed to the axis-drive linear slide 65
6 and Y fixed in the X-axis drive linear slide 64
The linear heating mechanism 69 extending in the direction parallel to the X-axis drive linear slide 64, and the needle 72 serving as a discharge port are fixed to the Z-axis drive mechanism 66 so as to face the coating target member 62, and the frit 71 is provided in the container. A filled dispenser 61, an air hose 67 connected to the dispenser 61 through an X-axis drive linear slide 64, a Y-axis drive linear slide 65, and a Z-axis drive mechanism 66, and sending air into the container of the dispenser 61, and an air hose 67. The dispenser controller 68 controls the amount of the frit 71 ejected from the needle 72 by adjusting the air sent through the computer, and the computer 30 that centrally controls the operation such as driving and ultrasonic vibration.

Next, with reference to FIGS. 5, 6, 9 and 10, the operation of the coating apparatus having the above construction will be described.

In FIG. 5 and FIG. 6, an image forming in which a spacer as shown in FIG. 9 and FIG. 10 is disposed as a member 62 to be coated just below a dispenser 61 equipped with a needle 72 for ejecting a frit 71. The front plate or back plate of the device is set on the stage 63. The frit 71 in the dispenser 61 is agitated by the agitation mechanism 73 as needed to prevent the frit 71 from aggregating.

The stage 63 is fixed, the dispenser 61 can be freely driven in the XYZ directions by the X-axis drive linear slide 64, the Y-axis drive linear slide 65 and the Z-axis drive mechanism 66, and the frit 71 discharged from the needle 72 is It is possible to apply an arbitrary pattern on the member 62 to be coated. The XYZ axis drive mechanism is controlled by a drive control unit incorporated in the apparatus, and the discharge of the frit 71 is performed by the dispenser 61 controlling the supply of air pressure from the air hose 67 by the dispenser controller 68.

A linear heating mechanism 69 in which halogen lamps are linearly arranged is attached to the X-axis drive linear slide 64 so that it can be moved in the X-axis direction. By this mechanism, the surface of the coated member 62 in the Y direction in the figure can be sequentially heated, and the frit 71 immediately after being linearly coated by the dispenser 61 can be rapidly dried and solidified on the same device. In this case, since the dispenser 61 and the linear heating mechanism 69 can be driven independently, the coating speed and the drying speed can be set arbitrarily and finely. The power source of the linear heating mechanism 69 and the drive control unit of the XYZ axis drive mechanism are those built in the device.

With this heating, the temperature of the entire coating member does not rise, and with respect to overcoating, the drying and solidification of the frit is completed almost at the same time as the application, and the member to be coated is not required to be cooled. be able to.

Further, the operations of frit coating, stage driving, and frit heating described above are performed by centrally controlling the dispenser controller 68, the drive control unit and the heating power source built in the apparatus with the computer 70. -A series of repetitive operations of drying and recoating can be automated.

In this embodiment, the stirring mechanism is used to prevent the frit from aggregating, but of course, the ultrasonic vibration mechanism described in the first and second embodiments may be provided.

(Fifth Embodiment) FIG. 7 shows a modification of the dispenser shown in FIG.

In FIG. 7, the same parts as those described in the fourth embodiment are designated by the same reference numerals, and the description of the same parts as those in the fourth embodiment is omitted here.

In the present embodiment, as shown in FIG. 7, a multi-dispenser system in which a plurality of dispensers 74 (three in this case) are installed is adopted to improve the coating efficiency. The number of dispensers 74 may be arbitrarily selected according to the coating pattern.

With this structure, if it is operated in the same manner as in the fourth embodiment, more efficient coating becomes possible.

Although only one line-shaped heating mechanism is provided in this embodiment, a plurality of spot-shaped or line-shaped heating mechanisms may be provided depending on the number of dispensers.

(Sixth Embodiment) FIG. 8 shows a modification of the needle shown in FIG.

In FIG. 8, the same parts as those described in the fourth embodiment are designated by the same reference numerals, and the description of the same parts as those in the fourth embodiment is omitted here.

In the present embodiment, a multi-nozzle system in which a plurality of ejection ports of the needle 75 (five in this case) is used to efficiently draw a fine coating pattern.
The number of outlets of the needle 75 may be arbitrarily selected according to the coating pattern.

With this structure, if the same operation as in the fourth embodiment is performed, it becomes possible to efficiently apply a finer pattern.

Also in the case of this embodiment, a plurality of heating mechanisms can be provided in correspondence with the number of ejection openings of the multi-nozzle.

(Seventh Embodiment) Next, using the coating apparatus described in the third to sixth embodiments, frit coating is carried out to bond the spacer to the front plate or the rear plate, and the image forming apparatus is formed. An example of the case in which is created will be described.

Glass of 40 × 4 × 0.2 mm was used as a spacer, and LS-3081 (manufactured by Nippon Electric Glass) was used as a frit by dissolving it in terpineol.

When the series of operations for applying and drying the frit described above was repeated by the application apparatus of the third to sixth embodiments, the applied frit had a width and height of 0.2 mm, and the positional accuracy was within ± 5 μm. I was able to fit in.

As a result, it was possible to prepare an image forming apparatus in which a spacer was set up at a predetermined position in the image forming apparatus.

[0090]

As described above, according to the present invention, since at least one local heating mechanism for drying and solidifying the paste-like material applied on the member to be coated is provided, a drying furnace for drying and solidifying is provided. It is unnecessary.

Further, since the paste material itself can be directly dried and solidified in a short time by the local heating mechanism, and the entire coated member is not heated and the cooling step can be substantially omitted, the working time can be greatly shortened.

Further, since the drying work can be performed on the coating apparatus, the coating can be successively carried out without removing the member to be coated which is aligned with high accuracy, and the position automation can be ensured and the full automation can be carried out.

Further, since the member to be coated is not removed from the coating apparatus or moved to the drying oven, there is a risk of stripping the undried paste material or damaging the member to be coated itself. Sexuality can be avoided.

In addition, according to the present invention, since the dispenser is provided with the stirring mechanism and the ultrasonic vibration mechanism, the frit glass alone is not aggregated in the dispenser to cause clogging, and the coating is excellent in reproducibility and uniformity. Can be done.

The present invention is more effective when the paste material is a frit glass mixture, and is excellent in that the spacer can be fixed with high precision in the assembly of the image forming apparatus using this frit glass mixture. Produce the effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a coating apparatus of the present invention.

FIG. 2 is a perspective view showing the configuration of a second embodiment of the coating apparatus of the present invention.

3 is a partially enlarged view of the coating device shown in FIG.

FIG. 4 is a schematic configuration diagram showing a third embodiment of the coating apparatus of the present invention.

FIG. 5 is a perspective view showing the configuration of a fourth embodiment of the coating apparatus of the present invention.

6 is a partially enlarged view of the coating device shown in FIG.

FIG. 7 is a diagram showing a modification of the dispenser shown in FIG.

8 is a diagram showing a modification of the needle shown in FIG.

FIG. 9 is an exploded perspective view for explaining the configuration of a conventional image forming apparatus.

10 is a vertical cross-sectional view of the image forming apparatus shown in FIG.

[Explanation of symbols]

1, 31, 41, 71 Frit 2, 32, 42, 72, 75 Needle 3, 26, 43, 61, 74 Dispenser 4, 22, 45, 62 Member to be coated 5, 21, 46, 63 Stage 6, 47 Stage Drive mechanism 7,27 Ultrasonic vibration mechanism 8,48 Drive control unit 9,28,52,67 Air hose 10,29,53,68 Dispenser controller 11 Ultrasonic wave generation power source 12,30,54,70 Computer 23,64 X-axis drive linear slide 24,65 Y-axis drive linear slide 25,66 Z-axis drive mechanism 33 Connection part between needle and container 44,73 Stirring mechanism 49 Local heating mechanism 50 Heat source 51 Heating power supply 69 Line-shaped heating mechanism

Claims (9)

[Claims] 1. A dispenser for discharging a paste-like material, and a stage for holding a member to be coated,
In a coating device that relatively moves the dispenser and the stage to coat the paste-like material on the member to be coated, a local heating mechanism for drying and solidifying the paste-like material coated on the member to be coated is One or more coating devices are provided. 2. The coating apparatus according to claim 1, wherein the local heating mechanism has a spot shape or a line shape. 3. The dispenser is provided with a stirring mechanism for stirring the paste-like material,
The coating device according to claim 1 or 2. 4. An ultrasonic vibration mechanism for ultrasonically vibrating the paste material is further provided.
The coating device according to claim 1 or 2. 5. The coating apparatus according to claim 1, wherein an ultrasonic vibration mechanism for ultrasonically vibrating the paste-like material is provided instead of the local heating mechanism. 6. The coating apparatus according to claim 4, wherein the ultrasonic vibration mechanism is provided in the dispenser so as to be in contact with the paste-like material. 7. The coating apparatus according to claim 4, wherein the ultrasonic vibration mechanism is provided outside the dispenser. 8. The coating apparatus according to claim 1, wherein the paste material is a frit glass mixture. 9. An image forming apparatus manufactured using the coating apparatus according to claim 8.