JP4840299B2 - Coating liquid coating method, plasma display panel substrate manufacturing method - Google Patents

Description

  The present invention relates to a die for applying a coating liquid, and a coating liquid coating apparatus and method for applying a paste-like coating liquid to the surface of a substrate using the die. The present invention is particularly applicable to the field of manufacturing plasma display panels (hereinafter sometimes abbreviated as PDP), liquid crystal color filters (hereinafter sometimes abbreviated as LCM), optical filters, printed circuit boards, semiconductors and the like. Application of coating liquid that forms a thin film pattern while discharging the coating liquid in a non-contact manner onto the surface of the object to be coated, such as a glass substrate, particularly in a PDP manufacturing process for applying a high-viscosity coating liquid. It is suitable for the application die and the coating liquid coating apparatus and coating method.

  In recent years, displays have become increasingly diversified in their methods. One thing that is currently attracting attention is a plasma display that is larger, thinner and lighter than conventional cathode-ray tubes. This causes a discharge in the discharge space formed between the front plate and the back plate, and this discharge generates ultraviolet rays centering on a wavelength of 147 nm from the xenon gas, and the ultraviolet rays excite the phosphor to cause display. It becomes possible. Full-color display can be supported by causing the driving circuit to emit light by separately emitting discharge cells in which phosphors emitting red (R), green (G), and blue (B) are separately applied.

  In addition, the AC type plasma display that has been actively developed recently has a front glass plate on which display electrodes / dielectric layers / protective layers are formed and address electrodes / dielectric layers / partition layers / phosphor layers. It has a structure in which a mixed gas of He—Xe or Ne—Xe is sealed in a discharge space that is bonded to a back glass plate and partitioned by stripe-shaped barrier ribs.

  Further, in recent years, in the field of plasma displays, in order to meet demands for improvement in luminance and contrast and power saving, the coating liquid application direction (arrow direction in FIG. 1) extends as shown in FIG. A substrate 100 in which a horizontal partition wall 102 having a height lower than that of the vertical partition wall 101 is formed in a direction substantially orthogonal to the vertical partition wall 101 is also employed (for example, Patent Documents 1 and 2). In such a base material 100, since the horizontal barrier ribs 102 are disposed between the vertical barrier ribs 101, the grooves 110 between the vertical barrier ribs 101 are formed in a lattice shape having concave portions 103 and 104.

  In addition, the coating liquid coating method as described above is to apply a paste-like coating liquid 108 containing a phosphor to the groove 110 and dry and cure to form a phosphor layer. In order for the substrate to emit light between the barrier ribs 101 satisfactorily, the discharge generated between the barrier ribs 101 must be made to act on the phosphor efficiently, and the light generated by the phosphor must be efficiently extracted. As a shape of the phosphor layer for that purpose, it is preferable that the phosphor layer exists in a wide range over the entire wall surface of the partition wall 101 and the bottom of the groove portion. Therefore, it is preferable to fill the coating liquid 108 into the groove 110.

However, if the conventional apparatus and method for applying a coating liquid to a substrate having a stripe-shaped groove are applied to the application of a coating liquid to a substrate having a lattice-shaped groove as it is, the following problems arise. There is a fear. That is, as shown in FIG. 2, when a paste-like coating liquid is applied to the grooves 110 formed between the vertical partition walls, the coating liquid discharged from the discharge holes 106 of the base 105 passes over the horizontal partition walls 102. Although the clearance between the top of the horizontal partition wall 102 and the surface 109 of the discharge hole forming plate 107 having the discharge holes 106 of the base 105 is small, the coating liquid (paste) 108 is indicated by a dotted line in FIG. As such, there is a risk of adhering to the surface 109 of the discharge hole forming plate 107. Once the coating liquid adheres to the vicinity of the discharge hole 106 of the discharge hole forming plate 107 during application, the coating liquid discharged from the discharge hole 106 is attracted there, and the discharge behavior is disturbed, so that the coating liquid is not applied to the groove 110. There is a risk of missing coating liquid, so-called color loss.
JP 11-213896 A, JP 2000-123747 A

  Therefore, the object of the present invention is to prevent coating omission (color omission) and reliably draw a desired paste pattern on the surface of the substrate even when applying a coating liquid to a substrate having a lattice-like groove on the surface. An object of the present invention is to provide a coating liquid coating apparatus and coating method that can be formed, and a plasma display panel substrate manufacturing apparatus and manufacturing method.

To solve the above problem,
In addition, the coating method of the present invention includes a base material in which vertical barrier ribs are formed in a stripe shape on the surface, and horizontal barrier ribs having a height equal to or less than the height of the vertical barrier ribs are formed in a direction substantially perpendicular to the vertical barrier ribs. The coating liquid is discharged from a plurality of discharge holes provided in the base while relatively moving the base provided opposite to the base, and applied to the grooves between the selected vertical partition walls of the base. A method of applying a liquid, which is surrounded by a diameter (D) of a discharge hole of the die, a height (Hh) of the transverse partition, a surface having the discharge hole of the die, and a vertical partition and a transverse partition of a base material In this method, the distance (C) between the groove bottom surface formed in this way satisfies the condition of D + Hh <C.

  Further, in the case where the discharge hole of the base is formed in a non-circular shape, the opening dimension (B) in the direction along the application direction of the coating liquid in the discharge hole may satisfy the condition of B + Hh <C. .

  In addition, in order to solve the above-mentioned problem, another coating method of the present invention includes a base material on which vertical partition walls are formed in a stripe shape on a surface, and a die provided to face the base material. A method of discharging a coating liquid from a plurality of discharge holes provided in a base while relatively moving, and applying a coating liquid to a groove portion between selected vertical partition walls of the base material. The relative speed (V) and the discharge speed (v) of the coating liquid from the discharge hole of the die satisfy the condition of 0 <V / v ≦ 1. In addition, the said base material may have the horizontal partition below the height of a vertical partition formed in the direction substantially orthogonal to a vertical partition.

  In order to solve the above-mentioned problem, another coating method of the present invention includes a base material in which vertical barrier ribs are formed in a stripe shape on the surface, and a base provided opposite to the base material. The coating liquid is discharged from a plurality of discharge holes provided in the base while relatively moving the base and the coating liquid is applied to the grooves between the selected vertical partition walls of the base material. This is a method characterized in that the area (a) of the holes and the cross-sectional area (A) of the groove formed between the vertical partition walls satisfy the condition of 0 <a / A ≦ 1.

  In order to solve the above-described problem, another coating method of the present invention includes a method in which vertical barrier ribs are formed on the surface in stripes, and the height of the vertical barrier ribs in a direction substantially perpendicular to the vertical barrier ribs. The substrate is formed by discharging a coating liquid from a plurality of discharge holes provided in the base while relatively moving a base material on which the following horizontal partition walls are formed and a base provided to face the base material. A method of applying a coating liquid to the grooves between the selected vertical partition walls, the area (a) of the discharge holes of the die, the cross-sectional area (A) of the groove portions formed between the vertical partition walls and between the horizontal partition walls, Vertical barrier rib height (H), length in the coating direction between horizontal barrier ribs (L), horizontal barrier rib height (Hh), length of one horizontal barrier rib in the coating direction (Lh), and substrate with horizontal barrier ribs The method is characterized in that the ratio (k) of the coating amount of the substrate without the horizontal partition satisfies the following formulas (1) and (2).

k = 1− (Hh / H) · (Lh / (L + Lh)) (1)
0 <a / (k · A) ≦ 1 (2)
In order to solve the above problems, the coating liquid coating apparatus according to the present invention has a vertical barrier rib formed on the surface in the form of stripes and having a height equal to or less than the height of the vertical barrier rib in a direction substantially perpendicular to the vertical barrier rib. The coating liquid was discharged from a plurality of discharge holes provided in the base while relatively moving the base formed on the base and the base provided to face the base, and the base was selected. In a coating liquid coating apparatus for coating a coating liquid in a groove between vertical partition walls, a diameter (D) of the discharge holes of the die, a height (Hh) of the horizontal partition walls, a surface having the discharge holes of the die and a base material The diameter (D) and the interval (C) are defined so that the partition wall (C) between the vertical partition walls on the surface and the bottom surface of the groove formed between the horizontal partition walls satisfies the condition of D + Hh <C. Consists of.

  In addition, another coating liquid coating apparatus of the present invention for solving the above-described problem is a base material in which vertical barrier ribs are formed in a stripe shape on the surface, and a die provided to face the base material. A coating liquid application apparatus that discharges the coating liquid from a plurality of discharge holes provided in the base while relatively moving the coating liquid, and applies the coating liquid to the grooves between the selected vertical partition walls of the substrate, The area (a) is defined so that the area (a) of the discharge hole of the die and the cross-sectional area (A) of the groove formed between the vertical partition walls satisfy the condition of 0 <a / A ≦ 1. Consists of things.

  Furthermore, another coating liquid coating apparatus according to the present invention for solving the above-mentioned problem is that the vertical barrier ribs are formed in a stripe shape on the surface, and the vertical barrier ribs are formed in a direction substantially perpendicular to the vertical barrier ribs. Discharging the coating liquid from the plurality of discharge holes provided in the base while relatively moving the base material on which the horizontal partition wall of the height or less is formed and the base provided to face the base material, In the coating liquid application apparatus for applying a coating liquid to the grooves between the selected vertical partition walls of the base material, the area (a) of the discharge holes of the die, the cross-sectional area of the grooves formed between the vertical partition walls and between the horizontal partition walls (A), vertical partition wall height (H), horizontal partition wall application direction length (L), horizontal partition wall height (Hh), single horizontal partition wall coating direction length (Lh), horizontal The area (a) so that the ratio (k) of the coating amount of the substrate with the partition wall and the substrate without the horizontal partition wall satisfies the following conditions (1) and (2): Consisting of those characterized by defining.

k = 1− (Hh / H) · (Lh / (L + Lh)) (1)
0 <a / (k · A) ≦ 1 (2)
The coating liquid coating method and apparatus of the present invention can be applied to a wide range of technical fields. In particular, the light emitting substrate for plasma display includes a phosphor in any one color of red, green, and blue. This is an optimum apparatus and method for applying the coating liquid.

  In the coating liquid application method and apparatus as described above, the diameter (D) of the nozzle discharge hole and the height of the horizontal partition wall (Hh), and between the vertical partition wall of the base discharge hole forming plate and the substrate It is necessary to satisfy the condition of D + Hh <C with respect to the distance (C) from the bottom of the groove formed between the partition walls. The paste-like coating liquid discharged from the discharge holes maintains the shape as it is, that is, the shape of the discharge holes, immediately after application. Therefore, if the diameter (D) of the discharge hole is the sum of the diameter (D) and the height (Hh) of the horizontal partition wall is not smaller than the interval (C), the coating liquid after application is discharged from the die. The possibility of adhering to the hole forming plate is eliminated. Further, when the discharge hole of the die is non-circular, if the opening dimension (B) in the direction along the application direction of the coating liquid of the discharge hole satisfies the relationship of B + Hh <C, the discharged paste is Problems that adhere to the discharge hole forming surface can be prevented.

  Further, the relative movement speed (V) between the base and the base material and the discharge speed (v) of the coating liquid from the discharge holes need to satisfy 0 <V / v ≦ 1. The paste-like coating liquid discharged from the discharge holes bends in the direction of relative movement between the die and the substrate. Further, the coating liquid may spread on the discharge hole forming surface due to the relationship between the bending of the paste and the wettability of the surface having the discharge hole of the discharge hole forming plate of the die. However, once the coating liquid wets and spreads on the discharge hole forming plate, the coating liquid discharged from the discharge holes may further spread on the discharge hole forming surface. In order to apply the coating liquid on the substrate against this wetting action, it is necessary to adjust the discharge angle of the coating liquid. As shown in FIG. 3, the discharge angle (θ) is tan θ depending on the moving speed (V) of the substrate 100 or the base 105 in the application direction (arrow direction) and the discharge speed (v) of the paste 108 from the discharge hole 106. = V / v. That is, the smaller the θ is, the lower the possibility of the coating liquid 108 adhering to the surface 109, and it has been experimentally found that the adhesion of the coating liquid 108 to the surface 109 can be prevented if θ = 45 °. Therefore, it is necessary to satisfy the condition of 0 <V / v ≦ 1.

  Further, the coating liquid 108 needs to be filled in the groove portion 110 as a whole. When the area (a) of the discharge hole of the die and the cross-sectional area (A) of the groove portion formed between the vertical partition walls, the coating amount per unit time ( Since Q) is Q = a · v = A · V, it can be expressed as tan θ = V / v = a / A. Therefore, it is necessary to satisfy the condition of 0 <a / A ≦ 1.

  Further, the amount of application to the groove of the substrate having the horizontal barrier ribs may be less by the volume of the horizontal barrier ribs than that of the substrate having no horizontal barrier ribs. Since the paste is uniformly applied to the substrate with the horizontal barrier ribs as well as the substrate without the horizontal barrier ribs, the paste is deposited on the horizontal barrier ribs immediately after the application. However, by leaving (leveling) for a certain period of time, the paste on the horizontal barrier ribs flows down into the grooves between the horizontal barrier ribs, and the filling amount of the coating grooves between the horizontal barrier ribs becomes a necessary amount (full).

Here, the application amount per unit length to the groove portion of the substrate having the horizontal barrier rib is Qh, and the application amount to the groove portion of the substrate having no horizontal barrier rib is Q. In FIG. 4, when the groove width is W, Qh per unit length (Lh + L) is
Qh = W / H / L + W / (H-Hh) / Lh
Q when there is no horizontal partition is
Q = W · H · (Lh + L)
Therefore, the ratio k of the coating amount Qh to the groove portion of the substrate with the horizontal partition wall and the coating amount Q to the groove portion of the substrate without the horizontal partition wall is
k = Qh / Q
= [W · H · L + W · (H−Hh) · Lh] / [W · H · (Lh + L)]
= 1- (Hh / H). (Lh / (L + Lh))
It can be expressed as. Also in this case, the discharge angle (θ) needs to be set to θ = 45 ° or less, and therefore the condition of 0 <a / (k · A) ≦ 1 needs to be satisfied.

According to the coating liquid coating method and apparatus of the present invention, it is possible to reliably prevent the paste from adhering to the surface where the discharge holes of the die are formed. Can be applied.

  The present invention is a die having a plurality of discharge holes for applying a coating liquid to an object to be applied and arranged in a substantially straight line and having a coating liquid reservoir inside, and the discharge hole is formed in the coating liquid reservoir. It is a base provided with struts extending in a direction substantially orthogonal to the arrangement direction.

  A plurality of coating liquid supply ports are provided to supply the coating liquid to the coating liquid reservoir of the base, and the flow of the coating liquid from the upstream coating liquid supply source is branched to each coating liquid supply port. It is a base connected to a tournament channel for supplying the coating liquid to each coating liquid supply port.

  Then, when the supply flow rate of the coating liquid from each coating liquid supply port is changed over time, or the application of the coating liquid to the substrate and the supply of the coating liquid into the coating liquid reservoir of the base are repeated. The position where the coating liquid supplied from each coating liquid supply port merges in the coating liquid reservoir is changed by changing the supply flow rate of the coating liquid from each coating liquid supply port for each supply. It is preferable to apply the coating liquid by supplying the coating liquid so that it does not remain in the area.

  Further, a vertical barrier rib is formed on the surface in a stripe shape, and a base material in which a horizontal barrier rib having a height equal to or less than the height of the vertical barrier rib is formed in a direction substantially orthogonal to the vertical barrier rib, and provided facing the base material. When the coating liquid is discharged from a plurality of discharge holes provided in the base while the base is relatively moved, and the coating liquid is applied to the grooves between the selected vertical partition walls of the base, the discharge of the base is performed. The hole diameter (D), the height of the horizontal partition wall (Hh), the distance between the surface of the base having the discharge holes and the bottom surface of the groove formed between the vertical partition wall and the horizontal partition wall (C) Is preferably defined such that the diameter (D) and the interval (C) satisfy the condition of D + Hh <C.

  Then, the coating liquid is discharged from a plurality of discharge holes provided in the base while relatively moving the base material on which the vertical barrier ribs are formed on the surface and the base provided to face the base material. , A method of applying a coating liquid to a groove between selected vertical partition walls of a base material, the relative speed (V) between the base material and the base, and the discharge speed (v) of the coating liquid from the discharge hole of the base Preferably satisfies the condition of 0 <V / v ≦ 1.

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

  FIG. 5 is a perspective view of a die according to the present invention and a coating liquid coating apparatus using the die. This coating apparatus is an apparatus that forms a plurality of rows of striped coating liquid coating portions in a predetermined direction on the upper surface of the substrate 1 to be coated (in this embodiment, a light emitting substrate for plasma display). In FIG. 5, the coating apparatus has X slide rails 3 a and 3 b extending on the machine base 2 in the X-axis direction. An X slide table 4 is provided on the X slide rails 3a and 3b so as to be slidable in the X axis direction. The X slide table 4 is engaged with a drive shaft 5 for sliding the table 4 in the X axis direction. The X slide table 4 is slid in the X axis direction by the X axis motor 6. The substrate 1 is positioned on the X slide table 4 and is adsorbed and supported in a detachable manner.

  Above the machine base 2, a gate-type support machine base 7 is provided so as to straddle the machine base 2. The support machine base 7 has Y slide rails 8a and 8b extending in the Y-axis direction on the side surface 7a on the front side. A Y slide table 9 is provided on the Y slide rails 8a and 8b so as to be slidable in the Y-axis direction. A drive shaft 10 for sliding the table 9 in the Y-axis direction is engaged with the Y slide table 9. The Y slide table 9 is slid in the Y axis direction by the Y axis motor 11. The X slide table 4, the Y slide table 9, etc. constitute a first moving means 29 a that relatively moves the base 18 and the substrate 1 to be coated in the coating direction (X axis, Y axis direction).

  On the Y slide table 9, Z slide rails 12a and 12b extending in the Z-axis direction are provided. A Z slide table 13 is provided on the Z slide rails 12a and 12b so as to be slidable in the Z-axis direction. A drive shaft 14 for sliding the table 13 in the Z-axis direction is engaged with the Z slide table 13. The Z slide table 13 is slid in the Z-axis direction, that is, the direction in which the base 18 approaches and separates from the base material 1 by the Z-axis motor 15 connected to the Z-axis direction position control means 41. In this way, the second moving means 29b is configured.

  A base 18 is attached to the Z slide table 13. A position sensor 17 for detecting the position of the base 18 in the Y-axis direction is attached to the Y slide table 9. The position sensor 17 is movably supported on a sensor support shaft 16 provided in the Y-axis direction on the upper surface of the support machine base 7. A Y-axis direction speed control means 20 for changing the moving speed of the Y slide table 9 is connected to the Y-axis motor 11.

  The base 18 is moved in the Y-axis direction of FIG. 5, and the coating liquid is discharged from a plurality of discharge holes 18 a provided substantially linearly at predetermined intervals on the discharge hole forming member 32 of the base 18. A plurality of rows of coating stripes 19 are formed on 1. The discharge holes 18a can be arranged at equal intervals, but can also be formed by changing the intervals at a predetermined period.

  FIG. 6 shows the periphery of the base 18 when the coating apparatus shown in FIG. 5 is viewed from the X-axis direction. The camera 22 attached to the Z slide table 13 images the representative recess 21 in the substrate 1, and the X slide table 4 is moved by the X axis position control unit 24 via the image position processing unit 23. Then, the center of the representative recess 21 is controlled so that the center of the representative discharge hole 18a in the base 18 corresponding to the representative recess 21 substantially coincides. That is, as shown in FIG. 7, the difference ΔX between the image of the recess 21 as a representative of the base material 1 and the center of the cursor 50 for image processing is corrected by moving the X slide table 4 in the X axis direction. ing.

  The representative recess 21 is the recess 21 in the center of the recess arrangement direction. The representative discharge hole 18a is the discharge hole 18a at the center in the arrangement direction. If the representative concave portion 21 and the representative discharge hole 18a are set to the concave portion 21 and the discharge hole 18a at the center in the arrangement direction, respectively, the positional deviation at the center between the concave portion 21 and the discharge hole 18a at the end in the arrangement direction is minimized. Can be suppressed.

  FIG. 8 is a longitudinal sectional view of the base 18. The base 18 includes a coating liquid reservoir forming member 31 in which a coating liquid reservoir 30 is formed, a discharge hole forming member 32 and a lid member 33 that are joined to the member 31. The members 31, 32, and 33 can be firmly joined to each other by welding, diffusion bonding, adhesion, fastening with bolts, or the like. The lid member 33 has a coating liquid supply port 35 that supplies the coating liquid 34 into the coating liquid reservoir 30 and a compressed air that feeds compressed air into a space 36 formed in the upper part of the coating liquid reservoir 30. A supply port 37 is provided.

  The compressed air supply port 37 is connected to one end of a gas pressure conduction path 38 formed of a pipe line. The other end of the gas pressure conducting path 38 is opened to a gas pressure source 40 having a pressure maintained at a set pressure. The gas pressure conduction path 38 is provided with an opening / closing means 39 formed of a direction switching valve, and the opening / closing switching of the opening / closing means 39 allows the space portion 36 and the gas pressure source 40 to communicate with each other. When the space portion 36 and the gas pressure source 40 are communicated with each other, compressed air is sent into the space portion 36, and the internal pressure of the space portion 36 rises. Along with this, a certain amount of the coating liquid 30 is discharged from the discharge hole 18a. It is designed to be discharged. The opening / closing means 39 detects the position of the discharge hole 18a of the base 18 and the relative position of the substrate 1, and controls the timing of the opening / closing means 39 so that the opening / closing timing is controlled by a position detection / discharge control means (not shown). It has become.

  In the coating liquid reservoir 30, as shown in FIGS. 8 and 9, a support column 41 extending in a direction orthogonal to the arrangement direction of the discharge holes 18a is provided. A plurality of columns 41 are arranged at equal intervals along the arrangement direction of the discharge holes 18a. In this embodiment, the cross-sectional shape of the support column 41 is circular. However, the cross-sectional shape is not limited to this, and it can be formed in an elliptical shape, a triangular shape, a quadrangular shape, a wing shape, or the like. Moreover, the support | pillar 41 and the coating liquid reservoir formation member 31 can also be fastened with the volt | bolt 48, as shown in FIG. An O-ring 49 is interposed on the joint surface between the support column 41 and the member 31 to ensure the sealability of the portion. In this embodiment, the type in which the space portion 36 is formed inside the base 18 is shown. However, for the type of base in which there is no space portion 36 and the coating liquid 34 is filled inside the base. The present invention can also be applied.

  FIG. 11 shows details of the recess 21 formed on the substrate 1 as seen from above. The recesses 21 are filled with phosphor paste 27 (coating liquid 34) of any one of red, blue and green, and the recesses 21 formed at a predetermined pitch by the partition walls 25 (vertical ribs) are the end portions of the display unit. It is not formed in the non-display portion 26. In this embodiment, as shown in FIG. 12, the same color coating liquid can be applied to every second recess 21. Therefore, the pitch of the discharge holes 18a is three times the pitch of the partition walls 25. In addition, the base material 1 may have a horizontal rib perpendicular to the partition wall 25 and the concave portions 21 may be formed in a lattice shape.

  In the present embodiment, since the strut 41 extending in the direction orthogonal to the arrangement direction of the discharge holes 18a is provided in the coating liquid reservoir 30 of the base 18, the arrangement direction of the discharge holes 18a of the base 18, in other words, The pressure strength against the internal pressure in the width direction of the base 18 can be greatly improved, the deformation of the base 18 can be effectively prevented, and the coating liquid can be uniformly applied onto the substrate 1.

  Further, since the columns 41 are arranged at equal intervals in the direction along the arrangement direction of the discharge holes 18a, the pressure resistance against internal pressure can be improved uniformly over the entire length direction of the base 18.

  Moreover, according to the structure which provides the support | pillar 41 like this embodiment, compared with the structure which thickens each member which forms a nozzle | cap | die in order to improve the pressure-proof intensity | strength with respect to the internal pressure of a nozzle | cap | die, a cost increase can be reduced significantly. Further, an increase in weight can be suppressed, and the attaching / detaching work of the base 18 can be facilitated.

  13 and 14 show a base according to the second embodiment of the present invention. In the present embodiment, the base 42 includes a coating liquid reservoir forming member 44 that forms the coating liquid reservoir 43, a discharge hole forming member 45 and a lid member 46 that are joined to the member 44. . A column 47 that extends in a direction perpendicular to the arrangement direction of the discharge holes 42 a is provided in the coating liquid reservoir 43. The support columns 47 are formed integrally with the coating liquid reservoir forming member 44, and a plurality of columns 47 are arranged along the arrangement direction of the discharge holes 42a.

  Also in this embodiment, the pressure strength against the internal pressure of the base 42 can be improved uniformly along the direction in which the discharge holes 42a are arranged, so that deformation of the base 42 can be prevented while suppressing an increase in weight and cost. .

  In this embodiment, since the support column 47 is formed integrally with the coating liquid reservoir forming member 44, an increase in the number of parts constituting the base 42 can be prevented, and handling properties when the base 42 is assembled can be prevented. Can also be improved.

  Next, another preferred embodiment of the present invention will be described with reference to the drawings.

  First, an example of an overall configuration of a coating liquid coating apparatus according to the present invention, particularly an overall configuration of a coating liquid coating apparatus for an uneven base material (for example, a plasma display panel base material) will be described.

  FIG. 15 is an overall perspective view of the coating liquid coating apparatus according to one embodiment of the present invention, and FIG. 16 is a schematic view around the table 206 and the base 220 in FIG.

  First, the overall configuration of the coating liquid coating apparatus will be described. FIG. 15 shows an example of a coating apparatus applied to manufacture of the plasma display panel according to the present invention. This apparatus includes a base 202. A pair of guide groove rails 208 is provided on the base 202, and a table 206 is disposed on the guide groove rails 208. The upper surface of the table 206 is provided with a plurality of suction holes 207 so that the base material 204 having irregularities formed on the surface in a striped pattern in one direction can be fixed to the table surface by vacuum suction. Yes. The base material 204 is moved up and down on the table 206 by lift pins (not shown). Further, the table 206 can reciprocate in the X-axis direction on the guide groove rail 208 via the slide leg 209.

  A feed screw 210 constituting a feed screw mechanism shown in FIG. 16 extends through a nut-like connector 211 fixed to the lower surface of the table 206 between the pair of guide groove rails 208. Both ends of the feed screw 210 are rotatably supported by a bearing 212, and an AC servo motor 216 is connected to one end of the feed screw 210 via a universal joint 214.

  As shown in FIG. 15, above the table 206, a base 220 that discharges the coating liquid is connected to an elevating mechanism 230 and a width direction moving mechanism 236 via a holder 222. The elevating mechanism 230 includes an elevating bracket 228 that can be moved up and down, and is attached to a pair of guide rods inside the casing of the elevating mechanism 230 so as to be movable up and down. In the casing, a feed screw (not shown) made of a ball screw is also rotatably disposed between the guide rods, and is connected to the lifting bracket 228 via a nut-type connector. . Further, an AC servo motor (not shown) is connected to the upper end of the feed screw, and the lifting bracket 228 can be arbitrarily moved up and down by the rotation of the AC servo motor.

  Further, the elevating mechanism 230 is connected to the width direction moving mechanism 236 via a Y-axis moving bracket 232 (actuator). The width direction moving mechanism 236 moves the Y-axis moving bracket 232 so as to reciprocate in the width direction of the base, that is, the Y-axis direction. Guide rods, feed screws, nut type connectors, AC servo motors and the like necessary for operation are arranged in the casing in the same manner as the lifting mechanism 230. The width direction moving mechanism 236 is fixed on the base 202 by a support column 234. With these configurations, the base 220 can be freely moved in the Z-axis and Y-axis directions.

  Further, referring to FIG. 15, an inverted L-shaped sensor column 238 is fixed to the upper surface of the base 202, and the position (height) of the top of the convex portion of the base material 204 on the table 206 is measured at the tip. A height sensor 240 is attached. Next to the height sensor 240, a camera 272 that detects the position of the uneven portion of the base material 204 is attached to the support column 270. As shown in FIG. 16, the camera 272 is electrically connected to the image processing device 274 and can quantitatively determine the change in the uneven portion position.

  Further, a sensor 266 that detects the position of the lower end surface (discharge hole surface) where the discharge hole 244 of the base 220 is provided with respect to the table 206 is attached to one end of the table 206 via the sensor bracket 264.

  Here, one embodiment of the coating apparatus of the present invention is shown in FIG. 16 for the portion for supplying and discharging the coating liquid and the compressed air to the base 220. The base 220 has a coating liquid reservoir 277 for storing the coating liquid therein, and a space 276 at the upper surface of the coating liquid. A compressed air supply hose 281, a compressed air control valve 282, a pressure reducing valve 284, and a compressed air source 286 are connected to the space portion 276 so that compressed air of an arbitrary pressure can be supplied. The pneumatic control valve 282 is controlled to be opened and closed by the overall controller 260. The pneumatic control valve 282 is controlled to be open when the coating liquid is applied, and the coating liquid 242 is discharged from the discharge hole 244 by the pressing force of the compressed air supplied to the space portion 276 in the base 220. The discharge hole 244 may have a hole diameter of 10 to 500 μm depending on the application width of the coating liquid.

  It is preferable that the base 220 has a configuration in which the inside of the base can be opened by removing the lid 280 and a cleaning operation can be performed.

  The amount of coating liquid in the base 220 is detected every time the coating operation is stopped. The coating apparatus of the present invention has a detecting means for detecting the coating liquid amount in the base 220 in a non-contact manner with respect to the coating liquid. For the detection of the coating liquid amount in the coating liquid reservoir 277 of the base 220, contamination by the coating liquid can be prevented by using a non-contact detection means. As this non-contact detection means, a sensor 288 for detecting the liquid level of the coating liquid is provided. The sensor 288 is electrically connected to the general controller 260, and the general controller 260 controls the supply device controller 258 according to the detection signal. In addition, the sensor may not be directly fixed to the base 220 but may be fixed to a sensor bracket (not shown) which is a separate member. In this manner, the sensor 288 is always a separate member even when the base 220 is replaced. There is no need to adjust the sensor position or the like every time the base is replaced. The sensor bracket is preferably one that can adjust the position of the sensor 288 in the height direction and can be fixed at an arbitrary position in consideration of the fact that the detected liquid surface height level varies depending on the shape specification of the base 220. In the present invention, the sensor 288 can be applied as long as it is a sensor capable of non-contact detection such as a laser type and an ultrasonic type. Among them, a laser displacement meter is most preferable from the viewpoint of detection accuracy and wide detection range. In this case, it is preferable to attach a transparent plate to the base 220 so that the liquid level can be detected.

  A filter 247, a coating liquid supply hose 246, a coating liquid supply flow rate adjustment control valve 248, and a coating liquid tank 297 are connected to the base 220. A coating liquid 242 is stored in the coating liquid tank 297 and is connected to a pressurized air source 250 via a compressed air control valve 254.

  In the above embodiment, the motor controller 262 includes the AC servo motor 216 that drives the table 206, the actuators 291 and 293 (for example, AC servo motors) of the elevating mechanism 230 and the width direction moving mechanism 236, and the table 206. A signal from a position sensor 268 for detecting the movement position of the nozzle 220, a signal from each of Y and Z axis linear sensors (not shown) for detecting the operating position of the base 220, and the like are input. Instead of using the position sensor 268, it is also possible to incorporate an encoder in the AC servo motor 216 and detect the position of the table 206 based on a pulse signal output from the encoder.

  In the overall configuration of the above-described coating liquid coating apparatus, the height sensor 240 is a non-contact measurement type using a laser, ultrasonic wave, or the like, or a contact measurement type using a dial gauge, a differential transformer, or the like. Any material having a measurable principle may be used.

  Further, the detection means for detecting the relative position where the discharge hole 244 of the die corresponds to the recess may be configured by an image processing apparatus using a camera that separately detects the recess and the discharge hole of the base material.

  Next, each embodiment is shown regarding the nozzle | cap | die of this invention. That is, the above-described base 220 and the coating liquid supply unit connected thereto can employ the following various configurations.

  FIG. 17 shows a longitudinal sectional view of a base 301 according to an embodiment of the present invention. A plurality of coating liquid supply ports 302 are provided in the base 301, and the plurality of coating liquid supply ports 302 are connected to a pipe that forms a tournament-shaped flow path 303 upstream thereof. Thereby, when supplying the coating liquid 305 to the coating liquid reservoir 304 of the base 301, the coating liquid 305 from the coating liquid supply source is evenly distributed and supplied from each coating liquid supply port 302 into the coating liquid reservoir 304. can do. The lid 306 of the base 301 is provided with a pressurized air supply port 309 that supplies pressurized air for discharging the coating liquid 305 stored in the coating liquid reservoir 304 from the discharge hole 307 to the upper space 308. The plurality of discharge holes 307 are arranged in a straight line, and the plurality of coating liquid supply ports 302 are arranged in a straight line substantially parallel to the arrangement direction of the discharge holes 307.

  FIG. 18 shows a base 311 in which the tip of the coating liquid supply port 312 has a pipe shape and the tip is immersed in the coating liquid 305. Thereby, it is possible to prevent bubbles from being mixed into the coating liquid when the coating liquid is supplied. In addition, in these bases 301 and 311, it is desirable that the intervals between the adjacent coating liquid supply ports are all equal in consideration of the flatness of the coating liquid level. Also, when the intervals between the coating liquid supply ports cannot be made equal, or when the number of coating liquid supply ports is an odd number, or even an even number can only be a multiple of 3, and a uniform tournament type flow path cannot be formed. In order to make the supply amounts from the respective coating liquid supply ports uniform, for example, the flow loss can be made uniform by changing the flow path length or changing the flow path diameter and adjusting the supply flow rate.

  FIG. 19 shows a base 321 in which a tournament-type flow path 323 upstream of the coating liquid supply port 322 is formed by bonding a plate material 324 having grooves. In the case of the pipe as described above, it becomes difficult to clean the inner wall of the pipe if the pipe becomes long. However, if the plate member 324 having the groove is formed, it can be disassembled and cleaned, so that the length of the flow path is increased. It is easy to clean.

  By supplying the coating liquid through the tournament type flow paths 303 and 323 as described above, the coating liquid can be evenly distributed in the coating liquid reservoir 304, and the uniform from each discharge hole 307. A discharge amount can be obtained.

  FIG. 20 shows a base 331 provided with a supply flow rate adjustment control valve 333 for adjusting and controlling the supply flow rate of the coating liquid upstream of the coating liquid supply port 332. The opening degree of the supply flow rate adjustment control valve 333 can be controlled by an electric signal, and the opening degree is controlled by the supply device controller 258. In the illustrated example, a supply flow rate adjustment control valve 333 is provided on one of the flow paths to the pair of coating liquid supply ports 332 branched by the tournament type flow path 334. As a result, as shown in FIG. 21, the supply liquid supply flow rate from each coating liquid supply port over time at every supply opportunity into the coating liquid reservoir 304 or even in one supply as shown in FIG. Therefore, the position where the coating liquid merges in the coating liquid reservoir 304 is shaken (moved) so that coating unevenness does not occur. As shown in the figure, the valve 333 can shake the joining position only with one of the adjacent coating liquid supply ports.

  FIG. 23 shows a base 341 in which a plurality of coating liquid supply ports 342 are divided into two groups (groups (1) and (2), (3) and (4)), and each is connected by a tournament channel 343. Is shown. Supply flow adjustment control valves 344a and 344b are provided in each of the two groups. The opening degree of these supply flow rate adjustment control valves 344a and 344b can be controlled by an electric signal, and the opening degree is controlled by the supply device controller 258. As a result, four locations can be supplied simultaneously at the timing shown in FIG. 24, only (1) and (2) of the coating liquid supply port 342, or only (3) and (4), It is also possible to repeat the supply from only one group. The supply flow rate adjustment control valves 344a and 344b are controlled in a pattern predetermined by the supply device controller 258.

  (1) (2) (3) (4) When supplying simultaneously, the location (boundary) where a coating liquid merges will generate | occur | produce between each coating liquid supply port 342, but as a countermeasure, first, If it is supplied only from 1) and (2), a confluence point is generated between (1) and (2), but since it is not supplied from (3) and (4), the coating liquid will gradually become (3 ) And (4), and the boundary where (1) and (2) meet also moves and blurs. This eliminates coating unevenness. However, if the supply liquid is supplied only from (1) and (2), it is difficult to flow if the coating liquid has a high viscosity. Therefore, the coating liquid on the (3) (4) side is lost or (1) ( The liquid surface height of the coating liquid is greatly different between the 2) side and the (3) (4) side, resulting in poor coating. Therefore, this time, switching from (3) and (4) is performed so as not to happen. That is, if the supply of only (1) and (2), only (3) and (4) is continued a certain number of times, for example, twice or more, and then this supply operation is repeated alternately in each group, The joining position moves each time, and coating unevenness does not occur. In consideration of the flatness of the coating liquid surface, it is better to periodically hold the opportunity to supply simultaneously from both groups, that is, (1), (2), (3), and (4).

  In FIG. 25, every other plurality of coating liquid supply ports 352 are divided into two groups (groups (1) and (3), (2) and (4)), and each is divided into a tournament flow path. A base 351 connected by 353a and 353b is shown. Supply flow rate adjustment control valves 354a and 354b are provided on each of the two groups and on the upstream side where they merge. These supply flow rate adjustment control valves 354a and 354b may be a supply flow rate adjustment control valve having a configuration as shown in FIG. 23. Alternatively, as shown in FIG. 25, the opening and closing of the valve is controlled by compressed air, and the compressed air is opened and closed by an electrical signal. It may be controlled by a pneumatic control valve 354a ′, 354b ′ for controlling the air pressure. As a result, it is possible to supply four locations at the same time, and it is possible to repeat the supply from only one group, such as only (1) and (3) or only (2) and (4). The difference from the embodiment shown in FIG. 23 is that the coating liquid supply port of the other group is near the joining position of the coating liquid of one group. As a result, when supplying from the coating liquid supply port of one group, a merging position of the coating liquid occurs between them, but if it is switched to supply from the other group before coating unevenness occurs, it occurs first. The approaching merging position is disturbed and coating unevenness does not occur. Further, in this embodiment, compared with the embodiment shown in FIG. 23, the flatness of the liquid level is advantageous. In particular, if the coating liquid supply port of the other group is arranged at the joining position of the coating liquid of one group, it is effective because the joining position can be further disturbed.

  FIG. 26 shows a base 361 provided with a sensor 362 for detecting the coating liquid amount (liquid level in this embodiment) in the coating liquid reservoir 304. Other configurations are substantially the same as those shown in FIG. The sensor 362 is electrically connected to the overall controller 60, and the overall controller 60 controls the supply device controller 58 in accordance with the electrical signal. The supply flow rate adjustment control valves 344a and 344b are application devices that are opened and closed by a supply device controller 258 to supply (replenish) the coating liquid.

  In this apparatus, as one method, an upper limit value and a lower limit value are set for the amount of coating liquid in the coating liquid reservoir 304, and supply is started when the lower limit is exceeded, and the upper limit is reached. Although this method depends on the difference between the upper limit value and the lower limit value, it is a method of supplying a relatively large amount of coating liquid in one supply operation. If the base is as shown in FIG. Since the supply flow rate from each coating liquid supply port can be changed over time during the supply operation, the joining position does not remain at a fixed position and coating unevenness does not occur.

  As another method, there is a method in which a management value is set for the amount of coating liquid in the coating liquid reservoir 304, and supply is started when the amount falls below the management value, and stopped when the amount exceeds the amount. This method is a method of supplying the coating liquid into the coating liquid reservoir 304 every time the coating operation is completed, although it depends on the coating amount on the base material (discharge amount from the base), as shown in FIG. With such a base, if the supply flow rate is changed every time the supply operation is performed, the joining position does not remain at a fixed position, and coating unevenness does not occur. 23 and 25, only (1) and (2) (or (1) and (3) only), (3) and (4) only (or (2) and If the supply of (4) only) is continued a certain number of times, for example, twice or more, and then this supply operation is repeated alternately in each group, the joining position moves each time, and coating unevenness does not occur. As the number of times of the continuous operation increases, the amount of movement at the joining position increases and coating unevenness does not occur. However, considering the flatness of the coating liquid surface, both grooves, that is, (1) (2) (3) (4) It is even better to narrow the opportunity to supply at the same time on a regular basis.

  In addition, as a sensor, there exist some which detect the liquid level height of a coating liquid non-contactingly as mentioned above, for example, there are non-contact displacement meters, such as a laser type and an ultrasonic type. Further, there is a method of measuring the weight of the base and detecting the amount of coating liquid in the coating liquid reservoir, and it is preferable to use a load cell capable of converting the detected weight into an electric signal as the weight detection sensor.

  Furthermore, another preferred embodiment of the present invention will be described with reference to the drawings.

  5, a plurality of vertical barrier ribs 101 extending in the coating liquid application direction and horizontal barrier ribs 102 extending in a direction orthogonal to the vertical barrier ribs 101 are formed on the surface of the substrate 1 in FIG. The relationship between the height (H) of the vertical partition wall 101 and the height (Hh) of the horizontal partition wall 102 is H ≧ Hh. Further, a lattice-shaped groove 110 is formed on the surface of the substrate 1 by the walls 101 and 102, and the groove 110 has recesses 104 and 103. The recess 104 is formed as a portion surrounded by the vertical partition wall 101 and the horizontal partition wall 102. On the other hand, the recess 103 is formed from the tops of the vertical partition walls 101 and the horizontal partition walls 102.

  FIG. 6 shows the periphery of the base 18 when the coating apparatus shown in FIG. 5 is viewed from the X-axis direction. A camera 22 attached to the Z slide table 13 captures an image of the representative groove 110 in the substrate 1, and the X slide table 4 is moved by the X axis position control unit 24 via the image position processing unit 23. The center of the representative groove portion 110 is controlled so that the center of the representative discharge hole 18a in the base 18 corresponding to the representative groove portion 110 substantially coincides.

  FIG. 27 is a schematic longitudinal sectional view of the coating liquid supply control device to the base 18 of the coating apparatus shown in FIG. In FIG. 27, a base 418 includes a housing 431, and discharge holes 418a for discharging a large number of coating liquids are formed in a row at predetermined intervals on the lower surface plate 432 of the housing 431. A space 433 inside the housing 431 is formed by a coating liquid storage part 434 in which the coating liquid 430 (phosphor paste 427) is stored and a gas space 435 positioned above the coating liquid storage part 434. The upper surface plate 436 of the housing 431 is provided with a gas pressure conduction hole 437, and one end of a gas pressure conduction path 438 formed of a pipe line is connected to the gas pressure conduction hole 437. The other end of the gas pressure conducting path 438 is opened to a gas pressure source 440 having a pressure maintained at a set pressure. The gas pressure conducting path 438 is provided with an opening / closing means 439 including a direction switching valve, and the gas space 435 and the gas pressure source 440 are communicated with each other by being opened / closed by the opening / closing means 439. The opening / closing means 439 detects the position of the discharge hole 418a of the base 418 and the relative position of the substrate 1, and the opening / closing timing is controlled by a position detection / discharge control means (not shown) that controls the timing of the opening / closing means 439. ing. In this embodiment, the paste 427 is applied with one of R (red), G (green), and B (blue).

  FIG. 28 shows details of the groove 421 formed on the substrate 1 as viewed from above. In this embodiment, as shown in FIG. 29, the same color coating liquid can be applied to every second groove 421. Therefore, the pitch of the discharge holes 418a is three times the pitch of the vertical partition walls 425a. In addition, as the board | substrate 1, as shown in FIG. 30, the thing without the horizontal partition 425b may be sufficient.

  In the present embodiment, there is a gap between the diameter (D) of the discharge hole 418a, the height (Hh) of the horizontal partition wall 425b, and the distance C from the bottom plate 432 of the base 418 to the bottom surface of the recess 421a of the groove 421. , D + Hh <C is established (FIG. 31). The paste 427 discharged from the discharge hole 418a immediately maintains the shape of the discharge hole 418a (FIG. 32). However, as long as the relationship of D + Hh <C is established, even if the paste 427 is applied to the top of the horizontal partition wall 421b, it does not adhere to the lower surface plate 432.

  When the discharge hole 418a is non-circular, the opening dimension (B) in the direction along the application direction of the discharge hole 418a satisfies the relationship B + Hh <C.

  In this embodiment, the relative movement speed (V) between the base 418 and the substrate 1 and the discharge speed (v) of the paste 427 from the discharge hole 418a need to satisfy 0 <V / v ≦ 1. As shown in FIGS. 32 and 33, the paste 427 discharged from the discharge hole 418 a bends in the moving direction of the base 418 or the substrate 1. Therefore, in order to prevent the discharged paste 427 from adhering to the lower surface plate 432, the discharge consisting of the discharge speed (v) and the moving speed (V) of the substrate 1 or the base 418 in the application direction (arrow direction). It is preferable to make the angle (θ) as small as possible. The discharge angle (θ) can be expressed by tan θ = V / v. Further, it has been experimentally found that the adhesion of the paste 427 to the lower surface plate 432 can be prevented in the range of 0 ° <θ ≦ 45 °. Therefore, if 0 <V / v ≦ 1, θ can be kept within the above range, so that the adhesion of the paste 427 to the lower surface plate 432 can be prevented.

  Further, in order to fill the recess 421a with the paste 427 as a whole, the application amount (Q) per unit time is expressed as tan θ = V / v = a / A because Q = a · v = A · V. Can do. Therefore, if 0 <a / A ≦ 1, θ can be kept within the above range, and adhesion of the paste 427 to the lower surface plate 432 can be prevented.

Further, the coating amount of the substrate having the horizontal partition wall 425b to the groove 421 may be less by the volume of the horizontal partition wall 425b than that of the substrate without the horizontal partition wall 425b. Since the paste 427 is uniformly applied to the substrate with the horizontal barrier ribs as well as the substrate without the horizontal barrier ribs, the paste 427 is deposited on the recesses 421b immediately after the application. However, when left standing (leveling) for a certain period of time, the paste 427 in the recess 421b flows down into the recess 421a, and the filling amount of the coating groove between the horizontal partition walls becomes a necessary amount (full). Here, the application amount per unit length to the groove portion of the substrate having the horizontal barrier rib is Qh, and the application amount to the groove portion of the substrate having no horizontal barrier rib is Q. In FIG. 4, when the groove width is W, Qh per unit length (Lh + L) is
Qh = W / H / L + W / (H-Hh) / Lh
Q when there is no horizontal partition is
Q = W · H · (Lh + L)
Therefore, the ratio k of the coating amount Qh to the groove portion of the substrate with the horizontal partition wall and the coating amount Q to the groove portion of the substrate without the horizontal partition wall is
k = Qh / Q
= [W · H · L + W · (H−Hh) · Lh] / [W · H · (Lh + L)] = 1− (Hh / H) · (Lh / (L + Lh))
It can be expressed as. Also in this case, since the discharge angle (θ) needs to be set to θ = 45 ° or less, in this embodiment, the condition of 0 <a / (k · A) ≦ 1 is satisfied. .

Reference Example 1 and Comparative Example 1
A substrate having only vertical partition walls is used, the width (W) between the vertical partition walls is 0.24 mm, the height of the vertical partition walls (H) is 0.12 mm, and the diameter (D) of the discharge port of the die is 0.1 mm. , 0.12 mm, 0.15 mm, and 0.22 mm of bases were used to apply paste (viscosity of about 600 poise) containing phosphor powder emitting blue light.
Reference Example 2 and Comparative Example 2
The paste was applied under the same conditions as in Reference Example 1 except that the width (W) between the vertical barrier ribs was changed to 0.28 mm.
Reference Example 3, Reference Example 4
The paste was applied under the same conditions as in Reference Example 1 except that the width (W) between the vertical barrier ribs was changed to 0.38 mm.
Example 1 and Comparative Example 3
Width between vertical barrier ribs (W) = 0.24 mm, vertical barrier rib height (H) = 0.12 mm, length between horizontal barrier ribs in coating direction (L) = 1 mm, horizontal barrier rib height (Hh) = 0.1 mm, length of one horizontal partition wall in the coating direction (Lh) = 0.08 mm, and the diameter (D) of the discharge hole of the die is 0.1 mm, 0.12 mm, 0.15 mm, 0.22 mm Using four types of caps, a paste containing a phosphor powder emitting blue light (viscosity of about 600 poise was applied).
Example 2 and Comparative Example 4
The paste was applied under the same conditions as in Example 1 except that the width (W) between the vertical barrier ribs was changed to 0.28 mm.
Example 3 and Example 4
The paste was applied under the same conditions as in Example 1 except that the width (W) between the vertical barrier ribs was changed to 0.38 mm.

The results of Reference Examples 1 to 4 and Comparative Examples 1 and 2 are shown in Table 1 and FIG. The results of Examples 1 to 4 and Comparative Examples 3 and 4 are shown in Table 2 and FIG. As a result, in Examples 1 to 4 , adhesion of the paste to the lower surface plate of the die was not observed, and the paste could be uniformly applied to the substrate without being discolored. On the other hand, in Comparative Examples 1 to 4, adhesion of the paste to the bottom plate of the die was observed. In addition, discoloration was observed on the substrate.

Where a = (D / 2) ² π
A = W · H
k = 1- (Hh / H). (Lh / (L + Lh))

It is a perspective view of the board | substrate which has a grid | lattice-like groove part. It is an expanded sectional view which shows the positional relationship of a nozzle | cap | die and a board | substrate of the coating device of the conventional coating liquid. It is sectional drawing for demonstrating the relationship between discharge speed and application | coating speed. It is an expanded sectional view of a substrate. It is a perspective view of the nozzle | cap | die which concerns on one embodiment of this invention, and the coating device of the coating liquid using this nozzle | cap | die. FIG. 6 is a schematic view of the periphery of the die when the coating apparatus shown in FIG. 5 is viewed from the X-axis direction. It is the schematic which shows the image of a recessed part, and the cursor of an image process. It is sectional drawing of the nozzle | cap | die of the coating device shown in FIG. It is sectional drawing which follows the VV line of the nozzle | cap | die of FIG. It is an expanded sectional view of the nozzle | cap | die which joined the support | pillar and the coating liquid reservoir formation member with the volt | bolt. It is the schematic which looked at the recessed part on a board | substrate from the upper surface. It is the schematic which shows the positional relationship of a discharge hole and a recessed part. It is sectional drawing of the nozzle | cap | die which concerns on another embodiment of this invention. It is sectional drawing which follows the XX line of the nozzle | cap | die of FIG. 1 is an overall perspective view of a coating liquid coating apparatus according to an embodiment of the present invention. It is a schematic diagram which shows the structure of the table of the apparatus of FIG. 15, and a nozzle | cap | die periphery. It is a schematic block diagram of the nozzle | cap | die which concerns on one embodiment of this invention. It is a schematic block diagram of the nozzle | cap | die which concerns on another embodiment of this invention. It is a schematic block diagram of the nozzle | cap | die which concerns on another embodiment of this invention. It is a schematic block diagram of the nozzle | cap | die which concerns on another embodiment of this invention. It is the figure which represented typically the supply flow volume of the coating liquid from each coating liquid supply port to the coating liquid reservoir part based on one embodiment of this invention. It is the figure which represented typically the supply flow volume of the coating liquid from each coating liquid supply port to another coating liquid reservoir part which concerns on another embodiment of this invention. It is a schematic block diagram of the nozzle | cap | die which concerns on another embodiment of this invention. It is the figure which represented typically the supply timing and flow volume of the coating liquid from each coating liquid supply port which concern on one embodiment of this invention to a coating liquid reservoir. It is a schematic block diagram of the nozzle | cap | die which concerns on another embodiment of this invention. It is a schematic block diagram of the nozzle | cap | die which concerns on another embodiment of this invention. It is the schematic of the supply control apparatus of the coating liquid to the nozzle | cap | die of the apparatus of FIG. It is the elements on larger scale of the board | substrate with which the coating liquid was apply | coated to the groove part. It is the schematic which shows the positional relationship of the discharge hole of a nozzle | cap | die, and a groove part. It is a partial enlarged plan view of a substrate. It is an expanded sectional view which shows the positional relationship of a nozzle | cap | die and a board | substrate of the apparatus of FIG. It is an expanded sectional view which follows the XI-XI line of FIG. It is an expanded sectional view which shows the application state of the coating liquid from the discharge hole of a nozzle | cap | die of FIG. It is a relationship figure which shows the relationship between the discharge hole area (a) of a nozzle | cap | die, and the cross-sectional area (A) of the groove part of the board | substrate which has a vertical partition on the surface. It is a relationship figure which shows the relationship between the discharge hole area (a) of a nozzle | cap | die, and the cross-sectional area (kA) of the groove part of a board | substrate which has a vertical partition and a horizontal partition on the surface.

Explanation of symbols

1 Substrate 418 Base 418a Discharge hole 421 Groove 421a Recess 421b Recess 425a Vertical partition 425b Horizontal partition 432 Bottom plate

Claims (4)

A vertical barrier rib is formed in a stripe shape on the surface, and a base material in which a horizontal barrier rib below the height of the vertical barrier rib is formed in a direction substantially orthogonal to the vertical barrier rib, and provided opposite to the base material A method of discharging a coating liquid from a plurality of discharge holes provided in the base while relatively moving the base, and applying the coating liquid to a groove portion between selected vertical partition walls of the base material. The area (a) of the discharge hole and the cross-sectional area (A) of the groove formed between the vertical partition walls satisfy the condition of 0 <a / A ≦ 1, the relative speed (V) between the base material and the base, and the base The discharge speed (v) of the coating liquid from the discharge holes satisfies the condition of 0 <V / v ≦ 1, and the diameter (D) of the discharge holes of the die, the height (Hh) of the horizontal partition walls, The distance (C) between the surface having the discharge holes and the bottom surface of the groove surrounded by the vertical and horizontal partition walls of the base material satisfies the condition of D + Hh <C. Coating solution method for coating according to claim Succoth. 2. The coating liquid according to claim 1, wherein the discharge hole of the base is formed in a non-circular shape, and an opening dimension (B) in a direction along a coating liquid application direction of the discharge hole satisfies a condition of B + Hh <C. Application method. The dimension of the direction perpendicular | vertical to the relative movement direction of the said nozzle | cap | die is longer than the application | coating area | region of the coating liquid of a base material, and application | coating of the coating liquid to a base material is completed by the said relative movement of the base once. Or the coating method of the coating liquid of 2. The said base material is a base material for plasma display panels, Comprising: The said coating liquid is a paste containing the fluorescent substance powder light-emitted in any color of red, green, and blue. The manufacturing method of the base material for plasma display panels characterized by including the process of apply | coating a coating liquid using the apply | coating method .

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