WO2006030508A1 - スペーサ散布装置及びスペーサ散布方法 - Google Patents
スペーサ散布装置及びスペーサ散布方法 Download PDFInfo
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- WO2006030508A1 WO2006030508A1 PCT/JP2004/013547 JP2004013547W WO2006030508A1 WO 2006030508 A1 WO2006030508 A1 WO 2006030508A1 JP 2004013547 W JP2004013547 W JP 2004013547W WO 2006030508 A1 WO2006030508 A1 WO 2006030508A1
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- WIPO (PCT)
- Prior art keywords
- spacer
- circulation
- containing liquid
- head
- opening
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
Definitions
- the present invention relates to a spacer spraying device and a spacer spraying method.
- a spacer-containing liquid including a number of spacers is sprayed upward from an opening of a head container forming a head chamber, and the substrate is disposed on a substrate disposed so as to face the opening.
- a device for spraying spacers is known.
- Such an apparatus is provided with an agitation tank for agitating the spacer-containing liquid in order to sufficiently disperse the spacer in the spacer-containing liquid.
- the spacer-containing liquid is circulated between the head chamber and the stirring tank by a pump. With the spacer-containing liquid circulating between the head chamber and the stirring tank, the spacer-containing liquid is ejected from the head chamber, and the ejected droplets adhere to a desired position on the substrate.
- the droplet of the spacer-containing liquid includes one or more spacers. Then, the spacer is fixed on the substrate by drying the droplet.
- Patent Document 1 Japanese Patent Laid-Open No. 2002-341352
- Patent Document 2 Japanese Patent Laid-Open No. 2003-121854
- the present invention has been made in view of the above problems, and provides a spacer spraying device and a spraying method capable of stably spraying a spacer to a desired place on a substrate. aimed to.
- the amount of circulation of the spacer-containing liquid between the head chamber and the stirring tank when the spacer-containing liquid is ejected by the opening force that is, the spacer in the head chamber.
- the circulation speed of the contained liquid is high, the straightness of the liquid droplets of the spacer-containing liquid ejected from the opening of the head chamber is likely to be impaired due to turbulence of the flow in the head chamber. It was found that the spraying accuracy deteriorated.
- the dispersibility of the spacer in the spacer-containing liquid may deteriorate. If the distance between the head chamber and the agitation tank is relatively long and the pipe line between the head chamber and the agitation tank is relatively long, such as when spraying a spacer on a large substrate, Even if the circulation rate is recovered after reducing the circulation rate of the spacer-containing liquid in the pipeline, it takes a lot of time to restore the dispersibility of the spacer-containing solution in the entire pipeline. Also, troubles such as clogging of piping and head chambers due to spacers may occur.
- the spacer spraying device includes a head container in which an opening that communicates the inside and outside of the head chamber is formed and a spacer-containing liquid that is held in the head chamber.
- Injection means for injecting the liquid from the opening to the outside of the head chamber, a stirring tank for stirring the spacer-containing liquid, a main circulation line having both ends connected to the stirring tank, and a main circulation line provided in the main circulation line A circulation pump; a sub-circulation line branched from the main circulation line and joined to the main circulation line via the head chamber; and a sub-circulation pump provided in the sub-circulation line.
- the spacer spraying method according to the present invention sprays a spacer-containing liquid from a head container that forms a head chamber and has an opening that communicates the inside and outside of the head chamber.
- the spacer-containing liquid is obtained by a main circulation step in which the spacer-containing liquid stirred in the stirring tank is extracted from the stirring tank by the main circulation line and then returned to the stirring tank, and the auxiliary circulation line. Is extracted from the main circulation line, passed through the head chamber, and then returned to the main circulation line, and a spraying process for spraying the spacer-containing liquid in the head chamber to the outside of the head chamber is performed. Prepare.
- the circulation amount of the spacer-containing liquid in the secondary circulation line that is, the circulation flow rate of the spacer-containing liquid in the head chamber
- the circulation flow rate of the spacer-containing liquid in the head chamber It can be reduced independently of the circulation flow rate.
- the flow of the spacer-containing liquid is less disturbed in the head chamber, and the straightness of the droplets ejected from the opening of the head chamber is increased. Therefore, droplets can be attached to a desired portion of the substrate, whereby the spacer can be accurately distributed to the desired position of the substrate.
- the spacer spraying device has a plurality of head chambers, and a sub circulation line and a sub circulation pump are provided for each head chamber.
- the spacer-containing liquid is extracted from the main circulation pipe through a plurality of sub-circulation pipes and provided corresponding to each sub-circulation pipe. It is preferable to pass through each of the head chambers and then return to the main circulation line.
- the above-mentioned effects can be suitably exerted, and furthermore, the circulation flow rate in the head chamber can be finely controlled.
- a tank is connected in the middle of the main circulation line, and each sub-circulation line is separated from this tank. It is preferable to join this tank via the branch head chamber.
- the spacer-containing liquid stirred in the stirring tank is extracted from the stirring tank by the main circulation pipe connected to the tank in the middle, and then returned to the stirring tank.
- the spacer-containing liquid is extracted from each tank force, passed through each head chamber, and then returned to the tank.
- the spraying means is driven to spray the spacer-containing liquid from the opening, and the auxiliary circulation pump is controlled to drive the spraying means. It is preferable to provide a control means for reducing the circulation amount of the spacer-containing liquid in the secondary circulation line.
- control means further controls the auxiliary circulation pump to increase the amount of circulation in the auxiliary circulation line after the injection of the spacer-containing liquid by the injection means.
- the circulation amount control step it is further preferable to increase the circulation amount in the auxiliary circulation line after the injection step.
- the spacer-containing liquid is circulated in a sufficient amount again in the auxiliary circulation pipe, and the dispersion of the spacer-containing liquid in the head chamber is dispersed.
- the characteristics can be kept extremely high to prepare for further injection.
- control means drives the injection means a plurality of times to inject the spacer-containing liquid a plurality of times from the opening, and controls the sub circulation pump to drive the sub circulation before the injection means is driven. It is preferable to reduce the circulation amount in the circulation line while increasing the circulation amount in the auxiliary circulation line after driving the spacer-containing liquid a plurality of times by the injection means.
- the spacer-containing liquid is injected a plurality of times from the opening, and in the circulation amount control step, the circulation amount of the spacer-containing liquid in the secondary circulation line is reduced before the injection step.
- the circulation amount in the auxiliary circulation line is increased after the spraying of the spacer-containing liquid in the injection process a plurality of times.
- control means stops the auxiliary circulation pump before driving the injection means.
- the circulation amount control step it is preferable to reduce the circulation amount in the auxiliary circulation pipe to the outlet before performing the injection step.
- the circulation amount of the spacer-containing liquid in the sub-circulation conduit when driving the injection means becomes zero, that is, the flow velocity in the head chamber becomes extremely small.
- the diameter of the liquid droplets can be controlled with higher accuracy, and the spacer can be dispersed more accurately at a desired location.
- the opening is formed in the upper wall of the head chamber, and the spraying means sprays the spacer-containing liquid with the opening force upward.
- the opening is formed in the upper wall of the head chamber, and it is preferable that the spacer-containing liquid is jetted upward in the jetting step.
- a spacer can be accurately and stably distributed to a desired location on a substrate.
- FIG. 1 is a schematic configuration diagram showing a spacer spraying device according to a first embodiment.
- FIG. 2 is a top view of the head assembly of FIG.
- FIG. 3 is a top view of the head device of FIG. 2.
- FIG. 4 is a view taken along arrows IV-IV in FIG.
- FIG. 5 is a view taken along arrows V—V in FIG.
- FIG. 6 is a diagram showing a substrate on which spacers are spread, (a) is a cross-sectional view of this substrate, (b) is a substrate on the opposite side of the glass substrate 121 from (a).
- FIG. [FIG. 7] FIG. 7 is a flowchart showing the operation of the spacer spraying device.
- Fig. 8 is a schematic diagram of the spacer spraying device, (a) is a schematic side view of the spacer spraying device, (b) is a schematic diagram of the lower surface of the substrate in (a), and (c) is It is a top schematic diagram of the head device of (a).
- FIG. 9 is a schematic diagram showing a state in which a spacer-containing liquid is jetted onto a substrate, (a) is a schematic side view, and (b) is a schematic bottom view of the substrate in (a).
- FIG. 10 is a schematic diagram showing a state of drying the droplets on the substrate, (a) is a schematic side view when the droplets are dried, and (b) is a diagram of the substrate when the droplets are dried. Side view (c) is a bottom view of (b).
- FIG. 11 is a schematic configuration diagram showing a spacer spraying apparatus according to the first embodiment. Explanation of symbols
- FIG. 1 is a schematic diagram of a spacer spraying apparatus according to this embodiment.
- the spacer spraying device 1 sprays the spacer-containing liquid from the head devices 41 of the head assembly 40 to the upper substrate 86, respectively, and drops droplets of the spacer-containing liquid on the lower surface of the substrate 86. It is a device to attach.
- the spacer spraying device 1 mainly includes a stirring tank 20 that stirs the spacer-containing liquid 12, and a plurality of sprayers that spray the spacer-containing liquid 12 toward the upper substrate 86.
- Head Equipment 41 main circulation line LO for extracting the spacer-containing liquid 12 from the stirring tank 20 and returning it to the stirring tank 20 again, and the spacer-containing liquid in the main circulation line LO 30, a sub-circulation line L1 for passing the head device 41 and the discharge holder 32 and returning to the main circulation line L0 again, a substrate moving unit 80 for moving the substrate 86 above the head assembly 40, And a controller (control means) 90 for controlling the head device 41, the substrate moving unit 80, and the like.
- the head device 41 includes a head container 42 and an ejecting unit (ejecting means) 50.
- the head container 42 includes a thin plate 103 in which an opening 37 is formed, and a head chamber forming member 104 that forms head chambers 43A and 43B communicating with the opening 37.
- the ejection unit 50 includes a hammer 52 and a piezo element 54 that eject the spacer-containing liquid in the head chambers 43A and 43B from the opening 37. Further, a plurality of head devices 41 are assembled to form a head assembly 40. These are described in detail below.
- FIG. 2 is a detailed top view of the head assembly 40
- FIG. 3 is a top view of one head device 41
- FIG. 4 is a view taken along arrows IV-IV in FIG. 3
- FIG. 5 is a view taken along arrows V-V in FIG. is there.
- a number of head devices 41 are arranged in a row in a predetermined horizontal direction (the left-right direction in FIG. 2; hereinafter, this direction is referred to as the head device arrangement direction) on a horizontally installed surface plate 29. Fixed to panel 29.
- the head device 41 includes a box-shaped head container 42 in which head chambers 43A and 43B are formed.
- the head container 42 has one side 42A on one side (upper side in the figure) in the horizontal direction (vertical direction in FIG. 3, hereinafter referred to as the substrate movement direction) orthogonal to the head device arrangement direction, It is mainly composed of the other part 42B on the other side (illustrated side) of the substrate moving direction.
- the one part 42A and the other part 42B each have a box-shaped outer shape, and the one part 42A is shifted to the other side (the right side in the figure) in the head device arrangement direction with respect to the other part 42B. It is integrally formed.
- the end surfaces 42a, 42b of the one side 42A of the head container 42 in the head device arrangement direction and the end surfaces 42c, 42d of the other side 42B of the head container 42 in the head device arrangement direction are respectively the head device.
- the surface is perpendicular to the arrangement direction, and steps M in the head arrangement direction are generated between the end faces 42a and 42c and between the end faces 42b and 42d.
- each head container 42 as shown in FIGS. 2 to 3, a pair of elongated head chambers 43A and 43B that extend in the head device arrangement direction are spaced apart in the direction of moving the substrate and are parallel to each other. Each is formed. The sizes of the head chambers 43A and 43B are substantially the same.
- the head chamber 43A is formed in one part 42A of the head container 42, and the head chamber 43B is formed in the other part 42B of the head container 42,
- the chamber 43A is displaced from the head chamber 43B by a distance M on the other side (right side in the drawing) in the head device arrangement direction.
- the head container 42 is mainly formed by three members, ie, a lower member 101, an upper member 102, and a thin plate (plate) 103, which are vertically stacked. It has been done.
- the lower member 101 is a plate-like member whose upper surface 101a is substantially flat, and the upper surface 101a of the lower member 101 mainly provides the bottom walls 43b of the head chambers 43A and 43B.
- the upper member 102 is a plate-like member, and is placed and fixed on the upper surface 101a of the lower member 101.
- the upper member 102 is formed with a pair of left and right cavities 102a that open upward and downward, and the cavities 102a mainly provide the side walls 43s of the head chambers 43A and 43B.
- the lower member 101 and the upper member 102 constitute a head chamber forming member 104.
- the thin plate 103 is provided on the upper surface of the upper member 102 so as to cover the upper opening surface 102b of the cavity 102a, and mainly provides the upper walls 43c of the head chambers 43A and 43B.
- a large number of openings 37 are formed in the thin plate 103. Specifically, as shown in FIG. 3, in the thin plate 103, openings 37 communicating with the head chamber 43A are formed in a row in the head device arrangement direction to form an opening row 39A. Further, in the thin plate 103, a large number of openings 37 communicating with the head chamber 43B are formed in a line in the head device arrangement direction to form an opening line 39B.
- Each opening row 39A, 39B has n opening groups 38 (n> 2 and an integer, for example, 4 in the figure). That is, the number of aperture groups 38 is the same in each aperture row 39A, 39B.
- the aperture group 38 has m (m> 2 and integer) apertures 37 over the length K in the head device arrangement direction. Are arranged side by side. In the drawing, for the sake of simplicity, the number of openings 37 in the opening group 38 is reduced, but the number of openings 37 in the opening group 38 can be, for example, about 50 to 150.
- the aperture groups 38 are arranged alternately in the two aperture rows 39A and 39B.
- staggered means that the aperture groups 38 are alternately arranged in two rows along the head device arrangement direction, and when viewed from the substrate moving direction, the aperture groups 38 of the aperture row 39A and the aperture rows 39A It says that it is arranged so that it does not overlap with the aperture group 38.
- the distance between the opening groups 38 is the same at the distance L.
- the openings 37 are equally spaced in one row.
- a wide-spaced portion is formed between the aperture groups 38 of the aperture rows 39A and 39B, and the strength of the thin plate 103 is sufficiently ensured.
- the aperture groups 38 are alternately arranged in two rows, the spacers 10 can be evenly distributed in the row direction on the substrate 86 by the combination of the two aperture rows 39A and 39B.
- two head chambers 43A and 43B are formed in the head container 42.
- One head chamber 43A communicates with the opening 37 of the other opening row 39A
- the other head chamber 43B Since it communicates with the opening 37 of the opening row 39B, the inside of the head container 42 is horizontally divided into two. Accordingly, since the thin plate 103 is also supported by the downward force by the partition portion 42i (see FIG. 5) between the head chambers 43A and 43B, the thin plate 103 becomes a stagnation.
- the distance between the end surface 42a of the head container 42 and the opening group 38 closest to the end surface 42a in the opening row 39A is Dl.
- the distance between the end surface 42b of 2 and the aperture group 38 closest to the end surface 42b in the aperture row 39A is D2
- the distance between the end surface 42c of the head container 42 and the aperture group 38 closest to the end surface 42c in the aperture row 39B is D3
- D4 the distance between the end surface 42d of the head container 42 and the opening group 38 closest to the end surface 42d in the opening row 39B is D4
- (D1 + D2) ⁇ L and (D3 + D4) ⁇ L are satisfied.
- the head containers 42 having such a shape are arranged in a row so that the steps are fitted in the direction of arrangement of the head devices, so that the entire head assemblies 40 arranged in a row! :
- the opening group 38 is powerful against 2 ⁇ IJ! Different! Intense, strong, head, container 42, 42f3 ⁇ 4! / ⁇
- they can be arranged alternately so as to be the spacing force of the aperture group 38.
- the width 86 in the head device arrangement direction of the thin plate 103 of one head container 42 does not have to be increased so much.
- the spacer-containing liquid can be sprayed to a desired position of the large W substrate 86. Therefore, the spacer-containing liquid can be sprayed with high accuracy onto the wide substrate 86 while suppressing the stagnation of the thin plate 103 of the head container 42.
- the diameter of the opening 37 is, for example, about 10-50 m. Further, the interval between the openings 37 in the opening group 38 is set to be approximately the same as the width 122W of the colored resins 122R, 122G, and 122B described later.
- the upper member 102 and the lower member 101 are fixed to each other by screws (not shown) so that they can be attached to and detached from each other. Improve maintainability such as cleaning of the house.
- each head container 42 includes a first protrusion 33a provided on an end surface 42e on one side (upper side in the drawing) of the substrate movement direction, and an end surface on the other side (lower side in the drawing) in the substrate movement direction.
- Each has a second protrusion 33b provided on 42f.
- each of the surface plates 29 is provided with a plunger 35a for pressing each first protrusion 33a toward the other side (downward in the figure) in the substrate moving direction with a predetermined panel pressure.
- the surface plate 29 is provided with a micrometer 35b that extends and contacts the second protrusion 33b in one direction (upward in the drawing) in the substrate moving direction. Then, the head container 42 is sandwiched from both sides in the substrate moving direction by the plunger 35a and the micrometer 35b, and the micro device 35b is adjusted in the amount of expansion / contraction, thereby finely aligning the head device 41 in the substrate moving direction. Is possible.
- the one side 42A of the head container 42 has a supply pipe 46 that opens to one end (left end in FIG. 3) of the head chamber 43A and opens to the end face 42e in the substrate moving direction.
- a discharge pipe 47 is formed which opens at the other end (right end in FIG. 3) of the head chamber 43A and opens at the end face 42e.
- the other portion 42B of the head container 42 has a supply pipe 46 that opens to one end portion (left end in FIG. 3) of the head chamber 43B and opens to the end face 42f in the substrate moving direction, and the other end portion of the head chamber 43B.
- a discharge pipe 47 is formed which opens at the right end of FIG. 3 and opens at the end face 42f.
- one supply pipe 46 extends from the head chamber 43A in the upper member 102 in the substrate moving direction, and then proceeds downward to enter the lower member 101. Thereafter, the inside of the lower member 101 is advanced again in the substrate moving direction, and an opening is formed on the end surface 42e of the lower member 101 in the substrate moving direction.
- the other supply pipe 46 is also formed in the same manner although not shown.
- one discharge pipe 47 also extends in the substrate moving direction in the upper member 102 by the force of the head chamber 43B, and then moves downward to enter the lower member 101, and then enters the lower member 101. Is again opened in the substrate moving direction, and is opened in the end face 42f of the lower member 101 in the substrate moving direction.
- the other discharge pipe 47 is also formed in the same manner although not shown.
- a connecting pipe 48 is further connected to the end of each supply pipe 46, and the end of this connecting pipe 48 is connected to the hold tank 23 as shown in FIG. Further, as shown in FIG. 3, a connecting pipe 49 is provided at the end of each discharge pipe 47, and the end of the connecting pipe 49 is connected to the mold tank 25 as shown in FIG.
- the supply pipe 46 and the discharge pipe 47 are formed from the end faces 42 e and 42 f of the lower member 101 to the head chambers 43 A and 43 B of the upper member 102, respectively. Since the connecting pipe 49 is connected to the supply pipe 46 and the discharge pipe 47 that open to the lower member 101 instead of the upper member 102, it is easy to remove the upper member 102 from the lower member 101, thereby improving the maintainability of the head container 42. To do.
- the supply pipe 46 and the discharge pipe 47 are connected to the head chamber 43A, 43B force.
- the upper member 102 may be formed so as to pass only the upper member 102 up to the end surface, and the connection pipe 48 and the connection pipe 49 may be connected to the supply pipe 46 and the discharge pipe 47 that open to the upper member 102. In this case, the disturbance of the flow of the spacer-containing liquid in the head chamber is reduced.
- the supply pipe 46 and the connection pipe 48 constitute a pipe L4
- the discharge pipe 47 and the connection pipe 49 constitute a pipe L6.
- the inner diameter of the pipe L4 is made larger than the inner diameter of the pipe L6.
- the pipe diameters of the pipe L4 and the pipe L6 for example, the pipe L4 has an inner diameter of 10-6 mm, and the pipe L6 has an inner diameter of 8-4 mm.
- a piezo cavity 44 corresponds to each opening group 38. Are formed respectively.
- the piezo cavity 44 is opened downward, and a piezo element 54 is inserted into the piezo cavity 44 with a downward force.
- the bottom of the piezo element 54 is fixed to the lower member 101 by a fixing portion 55.
- Each of the piezo elements 54 is connected to the controller 90 and extends upward in response to a signal from the controller 90.
- the piezo cavity 44 and the head chambers 43A and 43B are communicated with each other through an opening 45.
- a hammer 52 is provided in the head container 42 so as to extend from the inside of the head chambers 43A and 43B through the opening 45 to the inside of each piezoelectric cavity 44.
- the hammer 52 and the piezo element 54 constitute an injection unit 50.
- the hammer 52 has a plate-like part 52a and a columnar part 52b in order of the upper force.
- the plate-like portion 52a is a plate-like member arranged vertically in the head chambers 43A and 43B, and its upper end surface 52d is arranged horizontally. As shown in FIG. 3, the upper end surface 52d has an elongated rectangular shape whose longitudinal direction is parallel to the head device arrangement direction, and the upper end surface 52d is longer than the length K of the opening group 38.
- the upper end surface 52d which has a width larger than the diameter of the opening 37, faces the entire opening 37 of each opening group 38 with a lower force.
- the columnar part 52b is a vertical cylindrical body extending downward, and is fixed to the lower end of the plate-like part 52a.
- the columnar portion 52b has a step with a large diameter portion and a narrow diameter portion in order, and the columnar portion 52b has a sealing O-ring 53 attached to the outer periphery in the vicinity of the step of the small diameter portion.
- the small diameter portion of 52b is inserted into the piezo cavity 44 through the opening 45.
- the upper end of the piezo element 54 is adhered to the lower end of the columnar part 52b of the hammer 52 !.
- the spacer-containing liquid 12 can be sprayed upward from the opening group 38 having a large number of openings 37 with one piezo element 54.
- the spacer-containing liquid 12 is sprayed upward in this way, the spacer-containing liquid is prevented from sagging on the opening isotropic substrate.
- the agitation tank 20 includes an agitation blade 17 rotated by a motor 17a, agitates the spacer-containing liquid 12, and disperses the spacer 10 in the liquid.
- the spacer for example, silicon oxide particles such as silica having a particle diameter of about 17 ⁇ m, plastic particles such as silicon-modified polymer, and the like can be used.
- the spacer carrier liquid 11 in which the spacer 10 is dispersed a mixed liquid of water and IPA can be used as the spacer carrier liquid 11 in which the spacer 10 is dispersed.
- the stirring vessel 20 may employ an ultrasonic dispersing device instead of the stirring blade 17, and the stirring blade 17 and the ultrasonic dispersing device may be used together if necessary. Also, as a stirring tank, you can use a so-called static mixer with a fixed stirring blade in the container.
- the stirring tank 20 is immersed in the thermostatic chamber 26 so that the temperature of the spacer-containing liquid 12 can be kept almost constant. Further, the height of the stirring tank 20 is freely variable in the vertical direction so that the position of the water surface of the spacer-containing liquid 12 can be adjusted.
- the main circulation line LO is a pipe line connected to the stirring tank 20 at both ends.
- a main circulation pump 71 is provided in the main circulation line LO.
- the main circulation pump 71 extracts the spacer-containing liquid 12 circulated in the agitation tank 20 from the agitation tank 20, passes the main circulation line LO, and returns it to the agitation tank 20.
- the main circulation line LO preferably extends from the agitation tank 20 to a position close to the head device 41 as long as the length of the auxiliary circulation line L1 should be shortened. [0087] (Sub-circulation line)
- the sub-circulation pipe L1 has a pipe L2, a supply holder 30, a discharge holder 32, a pipe L8, and a pipe L10.
- the sub-circulation pipe L1 is connected to the main circulation pipe LO and the head container 42. Form a circulation path to circulate the spacer-containing liquid between them!
- the supply hold 30 has a hold tank 23 and a pipe L4 branched from the hold tank 23 and opened to the head chambers 43A and 43B of the head devices 41.
- the discharge hold 32 has a hold tank 25 and a pipe L6 branched from the hold tank 25 and opened to the head chambers 43A and 43B of the head devices 41.
- the pipe L4 includes the supply pipe 46 and the connection pipe 48 (see FIG. 2).
- the pipe L6 includes a discharge pipe 47 and a connection pipe 49.
- the lengths of the pipes L4 are all the same length and the same inner diameter
- the lengths of the pipes L6 are all the same length and the same inner diameter.
- the length of the pipe L4 and the length of the pipe L6 are approximately the same.
- Each of the hold tank 23 and the hold tank 25 is a container having a predetermined volume.
- the predetermined volume may be, for example, about 4 to 10 times the internal volume of all the head chambers 43A and 43B of the head assembly 40.
- a line L 2 having a predetermined pipe diameter is branched and connected to the hold tank 23. Accordingly, the spacer-containing liquid 12 in which the spacer 10 is sufficiently dispersed in the stirring tank 20 is supplied from the main circulation line LO into the head chambers 43A and 43B via the supply manifold 30.
- the mesh filter 5 is provided on the side close to the hold tank 23 in the pipe L2.
- the mesh filter 5 should have an opening diameter that allows the spacer 10 to pass therethrough and prevents the passage of the aggregates of the spacer 10.
- the opening diameter is about 4 to 6 times the spacer diameter. It is a caliber.
- the material of the filter include metals and plastics.
- a pipe L 8 having a predetermined pipe diameter is connected to the hold tank 25, and this pipe L 8 is connected to the suction side of the sub-circulation pump 70. Furthermore, a pipe L10 having a predetermined pipe diameter is connected to the discharge side of the sub-circulation pump 70, and this pipe L10 joins the main circulation pipe L0.
- the sub-circulation pump 70 sucks the spacer-containing liquid in the hold tank 25 through the pipe L8 and discharges it to the main circulation pipe LO through the pipe L10.
- the auxiliary circulation pump 70 for example, it is preferable to use a magnet type pump without a sliding part.
- the substrate moving unit 80 includes a substrate suction unit 82 and a substrate moving unit 84.
- the substrate suction unit 82 supports the substrate 86 by sucking the substrate 86 above the head device 41 by static electricity or reduced pressure.
- the substrate moving unit 84 moves the substrate suction unit 82 that has sucked the substrate 86 horizontally in the substrate moving direction. Further, the substrate moving unit 84 can move the substrate 86 by a predetermined distance in the head device arrangement direction, and the substrate 86 can be aligned.
- the board moving part 84 is preferably a linear motor type that can move the board 86 with high precision.
- the substrate 86 as a spacer application object is moved by such a substrate moving unit 80, the conduit L4 and the conduit L6 are connected with the hammer 52, the piezo element 54, and the like. There is no need to move the head assembly 40 (head device 41), which has a relatively complicated structure. Therefore, the structure of the spacer spraying device 1 is simplified and the spacer It is relatively easy to improve the position accuracy of the jet.
- the controller 90 is a computer device that performs processing based on a predetermined program.
- a substrate 86 in which a color filter CF, a transparent electrode 124, and an alignment film 125 are sequentially laminated on a glass substrate 121 is prepared in advance.
- the color filter CF is composed of a black matrix 123 formed in a grid pattern on the glass substrate 121, and a red transparent resin 122R and a green transparent resin sequentially provided between the grids of the black matrix 123. It has 122G and blue transparent resin 122B.
- the black matrix 123 may be formed in a slit shape or the like.
- Each colored transparent tree moon 122R, 122G, 122B length 122U, f row is about 10-300 ⁇ m, width 122W is 5— It is about 100 ⁇ m.
- the black bear tritus 123 has a portion 123Y extending in the length direction of each colored transparent resin 122 and a portion 123X extending in the width direction of each colored transparent resin 122, and the width of the portion 123X.
- 123XW is, for example, 10-20 m
- the width of the portion 123Y is 123YW, for example, 5-30 m.
- the spacer-containing liquid 12 is put into the stirring tank 20 in advance. Further, the height of the water surface of the stirring tank 20 is set to be approximately the same as the height of the opening 37 of the head chambers 43A and 43B.
- Step S10 Do the auxiliary circulation pump 70, the main circulation pump 71, and the motor 17a are driven (Step S10 Do), whereby the stirring blade 17 is driven and the spacer-containing liquid 12 is stirred in the stirring tank 20.
- Spacer 10 is dispersed, and by the main circulation pump 71 being driven, the spacer-containing liquid 12 in which the spacer 10 is well dispersed in the stirring tank 20 is circulated in the main circulation line L0.
- the auxiliary circulation pump 70 the dispersed spacer-containing liquid in the main circulation line L0 passes through the head container 42 by the auxiliary circulation line L1 and returns to the main circulation line L0.
- the spacer-containing liquid in the main circulation line LO is sucked into the head chambers 43A and 43B of each head container 42 by the secondary circulation pump 70 via the line L2 and the supply manifold 30. Further, the gas is discharged to the main circulation line L0 via the head chambers 43A and 43B, the force discharge manifold 32, the line L8, and the line L10. Accordingly, the highly dispersible spacer-containing liquid 12 circulates between the stirring tank 20 and the head chambers 43A and 43B.
- the passage resistance of the pipe L4 can be made sufficiently lower than the passage resistance of the pipe L6. Therefore, when the head chambers 43A and 43B are sucked and discharged from the head chambers 43A and 43B by the auxiliary circulation pump 70 via the pipe L6, the spacers containing the head chambers 43A and 43B are also discharged.
- An amount 12 of the spacer-containing liquid 12 equivalent to the amount (flow rate) of 12 can be quickly replenished from the stirring tank 20 into the head chambers 43A and 43B via the pipe L4. Therefore, the internal force S of the head chambers 43A and 43B is less likely to be negative pressure, and the mixing of bubbles from the openings 37 into the head chambers 43A and 43B is reduced.
- the substrate suction unit 82 is used to horizontally support the substrate 86 by suction so that the alignment film 125 faces downward, and the substrate moving unit 84 supports the substrate.
- 86 (alignment) is performed (step S103).
- 8 (b) shows a bottom view of the substrate 86 in FIG. 8 (a)
- FIG. 8 (c) shows a top view of the head device 41 in FIG. 8 (a).
- the substrate 86 is arranged so that the length direction of each colored transparent resin 122R, 122G, 122B is parallel to the head device arrangement direction.
- the sub-circulation pump 70 is stopped (step S105).
- the circulation amount of the spacer-containing liquid between the head chambers 43A and 43B and the main circulation line L0 that is, between the head chambers 43A and 43B and the stirring tank 20, is almost zero.
- the circulation amount can be defined as, for example, the weight or volume of the spacer-containing liquid supplied to the head chambers 43A and 43B per unit time.
- the driving of the main circulation pump 71 is not stopped and the circulation amount is maintained, and the dispersion state of the spacer-containing liquid in the main circulation line L0 is maintained well.
- the substrate 86 is moved horizontally so as to pass above the head device 41, and each piezo element 54 is driven a plurality of times to thereby produce head chambers 43A, 43B.
- the spacer-containing liquid is sprayed upward from each opening 37 (step S107).
- a spacer-containing liquid droplet 110 adheres to the lower surface of the plate 86.
- the droplet 110 includes one or more spacers 10. Volume of the droplet 110 can be, for example, 4 X 10- 8 - is 8 X 10- 8 cm 3.
- FIG. 9 (b) is a view of the substrate 86 of FIG. 9 (a) as viewed from below, and the droplets 110 ejected from each opening 37 adhere to the black matrix portion 123Y on the substrate 86. To do.
- the spacer-containing liquid 12 is ejected upward from the opening 37, it is easy to eject a droplet 110 having a certain volume. Further, since the auxiliary circulation pump 70 is stopped, the circulation amount becomes almost zero, and the spacer-containing liquid 12 in the head chambers 43A and 43B has almost no turbulence in the flow based on the circulation flow. As a result, the straightness of the ejected liquid droplets is improved, and the liquid droplets can be attached to a desired location on the substrate. Therefore, the spacer can be dispersed at a desired position on the substrate.
- the diameter of the ejected droplets may vary.
- the spacers in the droplets may vary.
- the number may vary, and the spacer may not be contained in the liquid.
- the variation in droplet diameter tends to be reduced by reducing the circulation flow rate, and droplets containing an appropriate number of spacers can be ejected.
- step S108 After the substrate 86 passes over the head device 41, the ejection by the piezo element 54 is terminated (step S108). Thereafter, the auxiliary circulation pump 70 is driven again, and the circulation of the spacer-containing liquid 12 through the auxiliary circulation line L1 is resumed (step S109). As a result, the spacer-containing liquid 12 is sufficiently circulated again after jetting, and the dispersibility of the spacer 10 of the spacer-containing liquid 12 in the head chambers 43A and 43B is maintained in an extremely high state. Can be prepared for further spray onto the substrate.
- step SI11 the spacer sprayer 1 returns to step S103 and repeats this series of processing (step SI11) as necessary, thereby removing the substrate 86 to which the droplets 110 are attached as desired. Create a number.
- the substrate 86 to which the droplet 110 is attached is carried into the drying chamber by a substrate transfer device (not shown).
- the drying chamber as shown in FIG. 10 (a), the droplet 110 on the substrate 86 is dried by an infrared heater 150 or the like.
- the spacer 10 is attracted to the vicinity of the horizontal center of the droplet 110 due to surface tension or the like, so that the droplet 110 adheres to the substrate 86 as shown in FIGS. 10 (b) and 10 (c). Spacer 10 is fixed in the vicinity of the center of the portion.
- the particle density of the spacer 10 is higher than the density of the spacer carrier liquid 11, and the droplet adhering surface of the substrate 86 is directed downward as shown in FIG. 10 (a).
- the spacer 10 is settled at the bottom of the droplet 110 during the drying. Therefore, even when the surface of the substrate 86 is uneven, the spacer is particularly accurately detected. 10 is attracted to the horizontal center of the droplet 110 and fixed.
- the spacer spraying device 1 includes the main circulation line L0 and the auxiliary circulation line L1, so that the spacer-containing liquid is injected from the opening 37.
- the circulation amount of the spacer-containing liquid in the auxiliary circulation line L1 can be reduced independently of the circulation amount in the main circulation line L0. Therefore, before injection, a sufficient amount of the spacer-containing liquid is circulated through the main circulation line L0 and the auxiliary circulation line L1, and the spacer-containing liquid spacers in the head chambers 43A and 43B are circulated.
- the dispersibility of 10 can be kept extremely high. As a result, blockage of the opening 37 due to the poor dispersibility of the spacer can be sufficiently suppressed.
- the spacer-containing liquid in the main circulation line L0 is always kept sufficiently dispersed by the stirring tank 20. it can. Therefore, even when the distance between the agitation tank 20 and the head container 42 becomes long, the main circulation line L0 is extended to a position sufficiently close to the head chambers 43A and 43B, and the dispersibility is reduced due to a decrease in the circulation amount of the liquid containing the spacer.
- the main circulation line L0 is extended to a position sufficiently close to the head chambers 43A and 43B, and the dispersibility is reduced due to a decrease in the circulation amount of the liquid containing the spacer.
- a spacer spraying apparatus 501 according to a second embodiment of the present invention will be described with reference to FIG.
- the difference between the spacer spraying device 501 of the present embodiment and the spacer spraying device 1 according to the first embodiment is mainly the piping system between the stirring tank 20 and the head assembly 40. Will be described.
- the substrate moving unit 80 is omitted.
- a marque tank (tank) 24 is provided in the middle of the main circulation line L0, and the sub-circulation line L1 branches off from the march tank 24, and the head of the head container 42 is It merges again with the hold tank 24 via the chamber 43A or the head chamber 43B. Further, there is no hold in the middle of the secondary circulation line L1, and the secondary circulation line L1 is connected to the hold tank 24 for each head chamber 43A and for each head chamber 43B.
- a number of pipe lines L14 corresponding to the number of head chambers 43A and head chambers 43B are branched and connected to the head chambers 43A and 43B, respectively.
- a number of pipes L16 corresponding to the number of head chambers 43A and head chambers 43B are branched and connected to the head chambers 43A and 43B, respectively, and a combination of pipes L14 and L16.
- Sub-circulation pumps 70 are respectively connected to the pipes L16, and by operating these sub-circulation pumps 70, the spacer-containing liquid in the hold tank 24 passes through the pipes L14. Then, the air is sucked into the head chambers 43A and 43B, and thereafter the head chambers 43A and 43B are discharged and returned to the hold tank 24 through the pipes L16.
- Each of these secondary circulation pumps 70 It is controlled by the controller 90 in the same manner as in one embodiment.
- each pipeline L14 and the merge tank 24 force form the same hold as the supply mall 30 of the first embodiment, and each pipeline L16 and the manifold tank 24 force second force.
- the pressure loss between the pipes L14 is almost constant, and the pressure loss between the pipes L16 is almost constant, so that the head chambers 43A, 43B of the head containers 42 are transferred from the hold tank 24. It is easy to make the supply amounts of the spacer-containing liquids 12 supplied to the pipes almost equal.
- the inner diameter of the pipe L14 is made larger than the inner diameter of the pipe L16.
- the hold tank 24 is a container having a predetermined volume.
- the predetermined volume may be about 4 to 10 times the internal volume of all the head chambers 43A and 43B of the head assembly 40.
- the main circulation pump 71 removes the spacer-containing liquid 12 circulated in the agitation tank 20 from the agitation tank 20 in the same manner as in the first embodiment, and a main circulation line L0 including the hold tank 24. Pass through and return to stirring tank 20 again.
- the main circulation line L0 extends from the agitation tank 20 to a position close to the head assembly 40 as long as the length of the auxiliary circulation line L1 can be reduced. It is preferable that the hold tank 24 is located near the head assembly 40!
- the spacer spraying device 501 also includes the main circulation line L0 and the auxiliary circulation line L1, when the spacer-containing liquid is injected from the opening 37, the auxiliary circulation line
- the circulation amount of the spacer-containing liquid in the path L1 can be reduced independently of the circulation amount in the main circulation line L0. Therefore, before injection, a sufficient amount of the spacer-containing liquid is circulated through the main circulation line L0 and the sub-circulation line L1 including the hold tank 24, and the spacers in the head chambers 43A and 43B are circulated.
- the auxiliary circulation pump 70 is controlled to control the spacer in the auxiliary circulation line L1.
- the circulation flow rate of the spacer-containing liquid is low, unnecessary flow turbulence is reduced, and the straightness of droplets ejected from the opening 37 can be improved. Therefore, the spacer can be sprayed on the desired portion of the substrate.
- the mesh filter 5 is provided in the main circulation line LO. Further, the end of the main circulation line LO is connected to the bottom of the stirring tank 20 and the top of the stirring tank 20.
- the stirring tank 20 is provided with not only a stirring blade 17 but also an ultrasonic disperser 18.
- a jacket 201 is provided on the outer wall of the agitation tank 20, and the jacket 201 is supplied with the refrigerant from the chiller 200 through the pipe L20 so that the spacer-containing liquid can be cooled. Get ready!
- the opening 37 is formed in the upper wall of the head chambers 43A and 43B, and the force by which the ejecting unit 50 ejects droplets by directing upward from the opening 37.
- the opening 37 is formed in the bottom walls of the head chambers 43A and 43B, and the operation is possible even when the ejection unit 50 ejects droplets downward from the opening 37.
- two head chambers 43A and 43B are provided in the head container 42. Even if there is one head chamber in the 1S head container 42, the operation is possible. Further, the arrangement of the openings 37 in the upper walls 43c of the head chambers 43A and 43B can be arbitrarily changed.
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Abstract
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001350147A (ja) * | 2000-06-09 | 2001-12-21 | Matsushita Electric Ind Co Ltd | 液晶表示素子用のスペーサー散布方法 |
JP2002341352A (ja) * | 2001-05-11 | 2002-11-27 | Lac:Kk | スペーサー散布方法及び装置 |
JP2003043498A (ja) * | 2001-08-02 | 2003-02-13 | Ricoh Co Ltd | 液晶パネルのスペーサ散布装置 |
JP2003161950A (ja) * | 2001-11-29 | 2003-06-06 | Sekisui Chem Co Ltd | 液晶表示装置の製造方法及びスペーサ散布装置 |
-
2004
- 2004-09-16 WO PCT/JP2004/013547 patent/WO2006030508A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001350147A (ja) * | 2000-06-09 | 2001-12-21 | Matsushita Electric Ind Co Ltd | 液晶表示素子用のスペーサー散布方法 |
JP2002341352A (ja) * | 2001-05-11 | 2002-11-27 | Lac:Kk | スペーサー散布方法及び装置 |
JP2003043498A (ja) * | 2001-08-02 | 2003-02-13 | Ricoh Co Ltd | 液晶パネルのスペーサ散布装置 |
JP2003161950A (ja) * | 2001-11-29 | 2003-06-06 | Sekisui Chem Co Ltd | 液晶表示装置の製造方法及びスペーサ散布装置 |
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