JP2004057928A - Injection coating device for pattern forming material and injection coating method of pattern forming material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an injection coating device for a pattern forming material capable of enhancing the utilization efficiency of a material while simplifying the step and enhancing a processing accuracy, and an injection coating method for the pattern forming material. <P>SOLUTION: The injection coating device 60 has a placement base 62 on which a base plate 41 coated with the pattern forming material 61 is placed and has a gate type frame 63 arranged so as to straddle the placement base 62 and a delivery head 64 installed on the gate type frame 63. Since the pattern forming material 61 just after delivered onto the base plate from a nozzle 66 is irradiated with a light or heat, an irradiation part 72 is provided on the back side of the nozzle 66 with respect to the advancing direction (Y axis direction) of the delivery head 64. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pattern forming material injection coating apparatus and a pattern forming material injection coating method for forming an electrode pattern for a display panel on a substrate.
[0002]
[Prior art]
First, as an example of a display panel, a structure of a general plasma display panel (hereinafter, referred to as PDP) will be described. FIG. 1 is an exploded perspective view showing an internal structure of the PDP, and FIG. 2 is a plan view schematically showing a structure of a row electrode pair 2 (X, Y) of the PDP.
[0003]
In FIG. 1, a plurality of row electrode pairs 2 (X, Y), a dielectric layer 3 covering the row electrode pairs 2 (X, Y), a dielectric layer 3, a protective layer 4 made of MgO is formed in order. The row electrode pair 2 is composed of a transparent electrode 2a made of a transparent conductive film such as ITO having a large width, and a metal electrode (bus electrode) 2b made of a metal film having a small width to supplement the conductivity.
[0004]
On the other hand, on rear glass substrate 5 on the rear side opposed to discharge space 8, column electrodes 6, which are arranged in a direction orthogonal to row electrode pairs X and Y and form a display cell at each intersection, The three primary color phosphor layers 7R, 7G, and 7B are provided in a strip shape between 6 to partition the discharge space 8 and to cover the side surfaces of the column electrodes 6 and the partition 9 with respect to the discharge space 8. Is formed. A rare gas is injected and sealed in the discharge space 8.
[0005]
As shown in FIG. 2, each row electrode pair 2 (X, Y) corresponds to one line (row) L in a matrix display, and alternates in the column direction so as to be adjacent to each other with a discharge gap G interposed therebetween. Are arranged. In each line L, a display cell (discharge cell) is defined in the unit light emitting region E by each row electrode pair 2 (X, Y).
[0006]
Next, the display operation of the display in the above PDP will be described.
First, by performing an address operation by selective discharge between the column electrode 6 and the row electrode pair 2 (X, Y) shown in FIG. 2, a lighted cell (a cell on which wall charges are formed) and a light-off cell (a wall charge is formed). Cell that was not performed) is selected. After the address operation, by applying a sustaining pulse to all the lines L simultaneously and alternately to the row electrode pairs X and Y, a surface discharge is generated in the lighting cell every time the sustaining pulse is applied. The phosphor layers 7R, 7G, and 7B are excited by the ultraviolet light generated by the surface discharge to emit visible light.
[0007]
[Problems to be solved by the invention]
The electrodes such as the metal electrodes (bus electrodes) 2b and the column electrodes 6 are formed by coating an electrode material layer on the entire surface of the substrate by thick film coating or vapor deposition, or by patterning by photolithography or the like. I have. However, in such a method, there is a problem that the use efficiency of the material is poor, the number of steps is increased, and the processing takes time.
[0008]
Therefore, a pattern forming method by injection coating of a pattern forming material by an ink jet method, a dispenser method, or the like has been studied. Correspondingly, a method of maintaining the shape by applying a temperature of about 100 ° C. immediately after the injection and drying the solvent of the paste to maintain the pattern shape has been considered.
[0009]
In the above method as well, since processing such as drying is performed after all the injection coatings of the pattern forming material are completed, as shown in FIG. 3, the applied material layer spreads over time and the film thickness and width change. However, it may be difficult to form an accurate pattern.
[0010]
The present invention has been made in view of the above circumstances, and provides a pattern forming material injection coating apparatus and a pattern forming material injection apparatus that can simplify a process, improve processing accuracy, and improve material use efficiency. It is intended to provide a coating method.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is an apparatus for injection-coating a pattern-forming material for forming a predetermined pattern for a display panel on a substrate by injection-coating a pattern-forming material, A discharge head having a discharge hole for linearly applying and coating a pattern forming material on a substrate, an irradiation unit for irradiating light or heat to the pattern forming material discharged from the discharge hole onto the substrate, and the discharge head And a relative movement drive unit for relatively moving the substrate with respect to the substrate.
[0012]
According to a ninth aspect of the present invention, there is provided a method of injection-coating a pattern-forming material for forming a predetermined pattern for a display panel on a substrate by injection-coating the pattern-forming material. The method further includes a step of forming a predetermined pattern by moving an irradiating unit for irradiating the pattern forming material with light or heat immediately relative to the substrate.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the outline of the structure of a PDP as an example of a display panel manufactured by the pattern forming material injection coating apparatus and the pattern forming material injection coating method according to the embodiment will be described. FIG. 4 is a sectional view of the PDP.
[0014]
The PDP 40 has a front substrate 41a on the display surface side. On the front substrate 41a, a transparent electrode 42 as a row electrode and a bus electrode 43 are provided at predetermined intervals.
[0015]
Further, a black stripe layer 44 is provided between the bus electrodes 43. A dielectric layer 45 is formed to cover the transparent electrode 42, the bus electrode 43, and the black stripe layer 44. In some cases, a dielectric raised portion 46 may be formed on the dielectric layer 45.
[0016]
On the other hand, a back substrate 41b is also provided on the back side, and a plurality of column electrodes 47 arranged at predetermined intervals are provided in parallel on the inner surface side of the back substrate 41b. Further, a column electrode protection layer (dielectric layer) 48 for protecting the column electrode 47 is formed, and a phosphor layer 49 is provided.
[0017]
The front substrate 41a and the rear substrate 41b are separated from each other so that the row electrodes and the column electrodes 47 are orthogonal to each other. A discharge space 50 is formed between the two substrates 41a and 41b.
[0018]
Next, with reference to FIGS. 5 to 7, the injection coating apparatus 60 for the pattern forming material will be described. FIG. 5 is a view schematically showing a configuration of an injection coating device 60 for a pattern forming material. FIG. 6 is a diagram showing the relative movement of the ejection head. FIG. 7 is a view showing an irradiation operation for ejection and shape retention by the injection coating apparatus.
[0019]
As shown in FIGS. 5 and 6, the injection coating apparatus 60 has a mounting table 62 on which a substrate 41 (for example, a front substrate 41 a) to which a pattern forming material 61 is applied is mounted. And a discharge head 64 provided on the gate-shaped frame 63.
[0020]
The ejection head 64 can be moved in the X-axis direction (see FIG. 6) with respect to the portal frame 63 by an X-axis moving mechanism (not shown). The gate-shaped frame 63 is moved in the Y-axis direction with respect to the substrate 41 by a Y-axis moving mechanism (see FIG. 5) such as wheels that move along guide rails provided on the side surface of the mounting table 62, for example. it can.
[0021]
Therefore, after positioning the ejection head 64 at a predetermined position of the portal frame 63, the portal frame 63 can be moved with respect to the substrate 41.
[0022]
Further, the discharge head 64 is provided with a nozzle 66 (discharge hole) for linearly injecting and applying the pattern forming material 61 onto the substrate 41 mounted on the mounting table 62. The nozzle 66 is connected to a pump 68 by a pipe 67a.
[0023]
The nozzle 66 is connected to a pattern forming material tank 70 via a control valve 69 by a pipe 67b. The pump 68 and the control valve 69 are controlled by a pattern forming material discharge amount control unit 71 a provided in the control device 71, and the discharge amount of the pattern forming material 61 from each nozzle 66 is adjusted.
[0024]
The ejection head 64 is provided with an irradiation section 72 for irradiating the pattern forming material 61 ejected from the nozzle 66 onto the substrate 41 with light (such as ultraviolet rays) or heat (such as infrared rays).
[0025]
As shown in FIGS. 5 and 7, the irradiation unit 72 irradiates light or heat to the pattern forming material 61 immediately after being discharged onto the substrate from the nozzle 66, and therefore, the traveling direction (Y-axis direction) of the discharge head 64. Is provided on the rear side of the nozzle 66. Irradiation of light and heat by the irradiation unit 72 is controlled by an irradiation control unit 71b provided in the control device 71 controlling a light source 72a (a light source such as ultraviolet light or infrared light).
[0026]
In addition, the nozzles 66 may be configured to be arranged in a plurality of rows linearly at a predetermined pitch in a direction (X-axis direction) intersecting with the traveling direction of the ejection head 64. Thus, by moving the gate-shaped frame 63 in the Y-axis direction while the position of the ejection head 64 in the gate-shaped frame 63 in the X-axis direction is determined, the pattern forming material 61 can be applied to a plurality of rows at a time. .
[0027]
Next, an injection coating method of the pattern forming material will be described with reference to FIGS. First, the substrate 41 is mounted on the mounting table 62, and the ejection head 64 is positioned at a predetermined position in the X-axis direction of the portal frame 63.
[0028]
The gate-shaped frame 63 is moved in the Y-axis direction while controlling the amount of the pattern forming material 61 discharged from the nozzle 66 under the control of the pattern forming material discharge amount control unit 71a of the control device 71.
[0029]
At the same time, the irradiation control section 71b of the control device 71 controls the irradiation section 72 to irradiate the pattern forming material 61 immediately after being applied onto the substrate 41 with light or heat to maintain the pattern shape. Thus, a predetermined pattern is formed on the substrate 41.
[0030]
Next, the gate-shaped frame 63 is returned to the origin position, the ejection head 64 is positioned at the next pattern position in the X-axis direction, and the gate-shaped frame 63 is advanced in the Y-axis direction as described above to form the next pattern. .
[0031]
The bus electrode 43 can be formed by using a material in which a formation holding component is added to a silver paste or the like as the pattern forming material 61 described above. And, as the formation holding component, an ultraviolet curable resin, a thermosetting resin, or the like can be used.
[0032]
For example, when a silver paste or the like containing an ultraviolet curable resin is used, the irradiation unit 72 irradiates ultraviolet rays. Alternatively, when a silver paste or the like containing a thermosetting resin is used, the irradiating section 72 irradiates heat rays (such as infrared rays).
[0033]
When the thermosetting resin is contained as described above, the pattern may be formed by discharging the pattern forming material 61 while heating the substrate 41.
In this case, the solvent is immediately volatilized from the applied pattern, the flowability is reduced (the viscosity is increased), and the shape can be maintained.
[0034]
Alternatively, a silver paste or the like containing no shape-retaining component is discharged and irradiated with a laser beam or a heat ray (by a spot heater or the like) so that the pattern-forming material 61 is sintered at the same time as the application to maintain the pattern shape. You may.
[0035]
As described above, the pattern formation material 61 discharged onto the substrate 41 from the nozzles 66 of the discharge head 64 is immediately irradiated with light or heat by the irradiation unit 72. Therefore, as shown in FIG. The shape immediately after the injection of 61 can be maintained, and the target pattern can be formed with the minimum dimensional error.
[0036]
In particular, by providing the irradiation section 72 integrally with the ejection head 64, the pattern forming material 61 immediately after the injection can be easily irradiated with light or heat to maintain the shape.
[0037]
Further, by providing the ejection head 64 with a plurality of nozzles 66 linearly at a predetermined pitch in a direction intersecting with the traveling direction of the ejection head 64, a pattern of a plurality of rows can be accurately dimensioned in one reciprocation of the portal frame 63. Can be formed.
[0038]
Note that the pattern forming material injection coating apparatus and the pattern forming material injection coating method of the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
[0039]
For example, the bus electrode 43 using the electrode forming material as the pattern forming material has been described in the above-described pattern forming material injection coating apparatus and pattern forming material injection coating method.
[0040]
Further, when a dielectric paste is used as a pattern forming material, a raised portion 46 of the dielectric layer 45 is formed on the bus electrode 43 and / or on the dielectric layer 45 between the bus electrodes 43, 43, or when a black pigment is used. The present invention can also be applied to a case where the black stripe layer 44 is formed between the bus electrodes 43 using the containing paste.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an internal structure of a general PDP.
FIG. 2 is a plan view schematically showing a structure of a row electrode pair in the PDP of FIG.
FIG. 3 is an explanatory view showing problems in a conventional injection coating apparatus for a pattern forming material and a conventional injection coating method for a pattern forming material.
FIG. 4 is a cross-sectional view schematically showing the structure of a PDP as an example of a display panel manufactured by the pattern forming material injection coating apparatus and the pattern forming material injection coating method according to the embodiment of the present invention.
FIG. 5 is a diagram illustrating a configuration of an injection coating apparatus according to an embodiment of the present invention.
FIG. 6 is a perspective view showing a pattern forming material injection coating apparatus according to the embodiment of the present invention.
FIG. 7 is a diagram illustrating a pattern forming material applied to a substrate by an ejection hole and a state where the applied pattern forming material is stabilized by an irradiation unit;
FIG. 8 is an explanatory diagram showing the effects of the pattern forming material injection coating apparatus and the pattern forming material injection coating method according to the embodiment of the present invention.
[Explanation of symbols]
40 PDP (Display Panel)
41 Substrate 60 Injection coating device for pattern forming material 61 Pattern forming material 63 Portal frame (relative movement drive unit)
64 Discharge head 66 Nozzle (discharge hole)
71a Pattern forming material discharge amount control unit 72 Irradiation unit

Claims (10)

A pattern forming material injection coating apparatus for forming a predetermined pattern for a display panel on a substrate by injection coating a pattern forming material,
An ejection head having an ejection hole for linearly applying and applying a pattern forming material on the substrate,
An irradiation unit that irradiates light or heat to the pattern forming material discharged onto the substrate from the discharge holes,
A relative movement drive unit that relatively moves the ejection head with respect to the substrate,
An injection coating device for a pattern forming material, comprising: 2. The apparatus according to claim 1, wherein the pattern forming material is an electrode forming material. 2. The apparatus according to claim 1, wherein the pattern forming material is a dielectric layer forming material. The injection coating apparatus for a pattern forming material according to any one of claims 1 to 3, wherein the pattern forming material contains an ultraviolet curable resin, and the irradiation unit is capable of irradiating an ultraviolet ray. 4. The pattern forming material injection coating apparatus according to claim 1, wherein the pattern forming material contains a thermosetting resin, and the irradiation unit is capable of irradiating a heat ray. The said irradiation part is integrally formed with the said discharge head, and irradiates the light or heat with respect to the said pattern formation material immediately after being discharged on the board | substrate from the said discharge hole. 3. An injection coating device for a pattern forming material as described in 1. above. A pattern forming material discharge amount control for controlling a discharge amount of the pattern forming material discharged from the plurality of discharge holes, wherein the discharge holes are arranged in a plurality of rows in a straight line at a predetermined pitch in a direction intersecting with the traveling direction of the discharge head; The injection coating apparatus for a pattern forming material according to claim 1, further comprising a unit. 8. The apparatus according to claim 7, wherein the pattern forming material discharge amount control unit is capable of adjusting discharge amounts of the plurality of discharge holes. An injection coating method for forming a predetermined pattern for a display panel on a substrate by injection coating a pattern forming material from a discharge head,
Forming, with the ejection head, an irradiation unit for applying light or heat to the pattern forming material immediately after ejection, relative to the substrate, to form the predetermined pattern. Injection coating method of pattern forming material. Positioning the ejection head at the next pattern position, together with the ejection head, moving an irradiation unit for applying light or heat to the pattern forming material immediately after ejection, relative to the substrate, The method for injection-coating a pattern-forming material according to claim 9, further comprising a step of forming the pattern.

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