JP2005091820A - Method for manufacturing display device and apparatus for manufacturing display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a display device that suppresses pattern deviation without lowering the reliability of the display device, and also to provide a display device manufacturing apparatus. <P>SOLUTION: The method for manufacturing a liquid crystal display device 10 includes stages for: (S5) coating a substrate 8a with a seal material 4; (S7) heating substrates 8a and 8b until the seal material 4 begins to set; (S8) aligning the substrates 8a and 8b in a heated state; (S8) controlling the gap between the substrates 8a and 8b in the heated state; and (S9) sticking the substrates 8a and 8b together by making the seal material 4 completely set after the substrates 8a and 8b are aligned and the gap is controlled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a display element manufacturing method and a display element manufacturing apparatus, and more particularly, to a display element manufacturing method and a display element manufacturing apparatus capable of suppressing pattern deviation without reducing the reliability of the display element.

  FIG. 8 is a diagram showing manufacturing steps in a conventional method for manufacturing a liquid crystal display element.

  Referring to FIG. 8, as a substrate pretreatment, a transparent electrode is formed on each of the two glass substrates, and the substrate is cleaned (S101). Subsequently, a liquid crystal alignment material is applied on each of the transparent electrodes by a method such as offset printing, and an alignment film is formed through temporary baking and main baking (S102). Next, each alignment film is subjected to an alignment process by rubbing (S103). Thereafter, the substrate is washed with water in order to remove foreign matter and dirt on the surface (S104).

  Next, a sealing material for encapsulating liquid crystal is applied to either one of the substrates by a drawing apparatus or screen printing, and a seal pattern is printed (S105). Further, a UV (ultraviolet) curable resin for temporary fixing is spot printed with a dispenser or the like outside the region of the liquid crystal display element. On the other substrate, spacers of a predetermined size are dispersed to form a gap (a gap between the substrates) (S106). Subsequently, the two substrates are bonded together in the atmosphere. At the time of bonding, the alignment marks provided in advance on the electrodes of the two substrates are optically recognized, and when the alignment marks match, the UV curable resin for temporary fixing is irradiated with ultraviolet rays. To cure. As a result, the two substrates are aligned and temporarily fixed (S107). Then, the whole of the two substrates is pressurized using an air press device or the like, and the sealing material is cured by heating when the optimum gap is reached. As a result, the gap is controlled (S108).

  Thereafter, the glass portion outside the substrate region is cleaved, liquid crystal is injected into an empty cell formed in the gap portion, and the entire liquid crystal display element is annealed to realign the liquid crystal, thereby completing the liquid crystal display element.

In a conventional method for manufacturing a liquid crystal display element, pressure is applied after two substrates are aligned, and gap control is performed. For this reason, there is a problem that the UV curable resin for temporary fixing is detached due to the force applied to the two substrates when the gap is controlled, and the two aligned substrates are displaced again. In addition, since the two substrates are heated to cure the sealing material after the gap control, the temperature of the two substrates rises, and the two substrates aligned due to the stress caused by the difference in thermal expansion between the substrates. There was a problem that the substrate was displaced again (pattern displacement occurred). Here, a method of using a UV curable resin having a strong adhesive force is also conceivable. However, since a UV curable resin having a strong adhesive force has a high vitrification transition temperature (T _g ), UV is used at a temperature at which a normal UV curable resin becomes soft. The cured resin does not become soft. As a result, even if the normal UV curable resin is pressurized at a softening temperature, the gap is not reduced, and the gap cannot be controlled.

Therefore, a method for manufacturing a liquid crystal display element that can solve the above problem is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-264985 (Patent Document 1). In the method for manufacturing a liquid crystal display element disclosed in Patent Document 1, two substrates are aligned and bonded together in a pressure variable tank in a vacuum state. Then, the inside of the pressure variable tank is returned to the atmospheric pressure, and when the optimum gap is reached, the sealing material made of the UV curable resin or the thermosetting resin is cured. Thereby, since alignment and gap control are continuously performed without using the UN-curing resin for temporary fixing, it is possible to prevent the two aligned substrates from being displaced again during the gap control.
JP-A-11-264985

  However, in the method for manufacturing a liquid crystal display element disclosed in Patent Document 1, when a sealing material made of a UV curable resin is used, it is necessary to irradiate the entire surface of the substrate with UV in order to cure the sealing material. For this reason, since the alignment film is irradiated with UV, the quality of the alignment film is lowered, and as a result, there is a problem that the reliability of the liquid crystal display element is lowered. Further, in the method for manufacturing a liquid crystal display element disclosed in Patent Document 1, when a sealing material made of a thermosetting resin is used, two substrates must still be heated in order to cure the sealing material. For this reason, the problem that the two substrates aligned due to the stress caused by the difference in thermal expansion between the substrates again has not been solved.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a display element manufacturing method and a display element manufacturing apparatus capable of suppressing pattern deviation without reducing the reliability of the display element.

  The manufacturing method of the liquid crystal display element of the present invention includes a coating step of applying the sealing material to the first substrate, and heating the first substrate and the second substrate to a temperature at which the sealing material starts to cure, The position adjustment step for adjusting the bonding position of the first substrate and the second substrate, and the first substrate and the second substrate are heated to a temperature at which the sealing material starts to be cured. After the interval adjustment step for adjusting the interval between the substrate and the second substrate, the position adjustment step, and the interval adjustment step, the first substrate and the second substrate are bonded together by completely curing the sealing material. A joining step.

  According to the method for manufacturing a liquid crystal display element of the present invention, it is necessary to further heat the first substrate and the second substrate after adjusting the bonding position and interval between the first substrate and the second substrate. Therefore, the bonding position and the interval between the two substrates are not shifted due to the stress caused by the difference in thermal expansion between the substrates. In addition, since it is not necessary to irradiate the entire surface of the substrate with UV in order to cure the sealing material, it is possible to prevent the quality of the alignment film from being deteriorated, thereby solving the problem that the reliability of the liquid crystal display element is lowered. be able to. For the above reasons, it is possible to suppress the pattern shift without degrading the reliability of the liquid crystal display element.

  Moreover, according to the manufacturing method of the liquid crystal display element of this invention, it is not necessary to switch the inside of a pressure variable tank to a vacuum state and an atmospheric pressure state for every bonding of a set of liquid crystal display elements. For this reason, the tact time (required time for one process per liquid crystal display element) in bonding the two substrates can be shortened, and the production efficiency can be improved.

  Preferably, the manufacturing method further includes a preheating step of preheating the first substrate and the second substrate before heating.

  Thereby, when the first substrate and the second substrate are heated to a temperature at which the sealing material starts to cure, only a slight heating is required. For this reason, it is possible to prevent a difference in thermal expansion from occurring between the first substrate and the second substrate or within each of the first substrate and the second substrate due to a rapid temperature rise during heating. Is done. Therefore, when the bonding position and the interval between the first substrate and the second substrate are adjusted, the occurrence of pattern deviation between the two substrates is further suppressed. In addition, when the first substrate and the second substrate are heated to a temperature at which the sealing material starts to cure, the two substrates need only be slightly heated, so that the tact time for heating is shortened. Therefore, the manufacturing efficiency of the manufacturing method of the liquid crystal display device is improved.

  Preferably, in the manufacturing method, the first and second substrates forming the first pair and the first and second substrates forming the second pair are sequentially placed on the transport unit, and the position adjusting step and the interval adjusting are performed. The method further includes a step of sequentially transporting to a region where the step and the bonding step are performed. The time from when the first pair is placed on the transport unit to when the second pair is placed on the transport unit is the sum of the time required for the position adjustment step, the time required for the interval adjustment step, and the time required for the joining step. equal.

  Accordingly, when the first and second substrates are sequentially transported by the transport unit to the region where the position adjusting step, the interval adjusting step, and the bonding step are performed, the position adjusting step, the interval adjusting step, and the bonding for the first pair are performed. At the same time as the process is completed, the second pair arrives at a region where the position adjusting process, the interval adjusting process, and the joining process are performed. Therefore, loss of time from the arrival of the first and second substrates to the region where the position adjustment step, the interval adjustment step, and the bonding step are performed until the position adjustment step, the interval adjustment step, and the bonding step are performed is eliminated. be able to. Therefore, a display element can be manufactured efficiently.

  Preferably, in the above manufacturing method, the preheating step is performed by placing the first substrate and the second substrate on the heated transport unit.

  As a result, when the first substrate and the second substrate are preheated before heating, the preheating of the first and second substrates, the position adjusting step, the interval adjusting step, and the bonding step are performed. Since conveyance is performed simultaneously, a display element can be manufactured more efficiently. In addition, since the preheating time is constant for all the substrates, the quality of the display element is easily kept constant.

  The display element manufacturing apparatus of the present invention includes a heating holding member that holds each of the two substrates in a heated state up to a temperature at which the sealing material starts to cure, and positions of the two substrates held by the heating holding member. A position adjusting member that performs adjustment, a pressure member that presses and bonds the two substrates, and a preheating conveyance member that preheats and conveys the two substrates and supplies the two substrates to the heating holding member And.

  According to the display element manufacturing apparatus of the present invention, since the two substrates are supplied to the heating and holding member in a state preheated by the preheating conveyance member, the two substrates are heated to a temperature at which the sealing material starts to cure. In this case, the temperature rise of the two substrates is reduced. For this reason, a difference in thermal expansion between the two substrates or in each of the two substrates due to a rapid temperature rise during heating is suppressed. Therefore, when adjusting the bonding position and the interval between the two substrates, it is possible to prevent the pattern displacement between the two substrates. In addition, since it is not necessary to irradiate the entire surface of the substrate with UV in order to cure the sealing material, it is possible to prevent the quality of the alignment film from being deteriorated, thereby solving the problem that the reliability of the liquid crystal display element is lowered. be able to. For the above reasons, it is possible to suppress the pattern shift without degrading the reliability of the liquid crystal display element.

  According to the method for manufacturing a liquid crystal display element of the present invention, it is necessary to further heat the first substrate and the second substrate after adjusting the bonding position and interval between the first substrate and the second substrate. Therefore, the bonding position and the interval between the two substrates are not shifted due to the stress caused by the difference in thermal expansion between the substrates. In addition, since it is not necessary to irradiate the entire surface of the substrate with UV in order to cure the sealing material, it is possible to prevent the quality of the alignment film from being deteriorated, thereby solving the problem that the reliability of the liquid crystal display element is lowered. be able to. For the above reasons, it is possible to suppress the pattern shift without degrading the reliability of the liquid crystal display element.

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

(Embodiment 1)
FIG. 1 is a cross-sectional view showing the configuration of the liquid crystal display element according to Embodiment 1 of the present invention.

Referring to FIG. 1, the liquid crystal display element 10 is configured by bonding the periphery of two electrode plates 1 a and 1 b with a sealing material 4. The electrode plates 1a and 1b have substrates 8a and 8b, transparent electrodes 2a and 2b, and alignment films 7a and 7b. For example, each of the two substrates 8a and 8b made of synthetic resin or glass is disposed so as to face each other. Transparent electrodes 2a and 2b made of, for example, indium oxide are formed on the surfaces of the substrates 8a and 8b opposite to each other, and alignment films 7a and 7b are formed on the surfaces of the transparent electrodes 2a and 2b, respectively. Each is formed. A bead-shaped spacer 3 made of, for example, SiO ₂ is disposed between the alignment films 7a and 7b. The spacer 3 is disposed over the entire surface of the alignment films 7a and 7b in order to keep the gap between the substrates 8a and 8b uniform. The cells formed by the substrates 8 a and 8 b and the sealing material 4 are filled with liquid crystal 5. In addition, polarizing plates 6a and 6b made of, for example, indium oxide are disposed on the external surfaces (surfaces opposite to the opposing surfaces) of the two substrates 8a and 8b.

  Next, the manufacturing method of said liquid crystal display element is demonstrated.

  FIG. 2 is a diagram showing a manufacturing process of the liquid crystal display element in the first embodiment of the present invention.

  Referring to FIGS. 1 and 2, as a substrate pretreatment, transparent electrodes 2a and 2b are formed on each of two substrates 8a and 8b by sputtering or vapor deposition, and the substrates 8a and 8b are cleaned. (S1). Subsequently, a liquid crystal alignment material is applied onto each of the transparent electrodes 2a and 2b by a method such as offset printing, and alignment films 7a and 7b are formed through provisional baking and main baking (S2). Next, the alignment films 7a and 7b are aligned by rubbing (S3). Thereby, the electrode plates 1a and 1b are completed. Thereafter, the electrode plates 1a and 1b are washed with water in order to remove foreign matters and dirt on the surface (S4).

  Next, a sealing material 4 for encapsulating liquid crystal is applied by a drawing device or screen printing around the surface of the substrate 8a facing the substrate 8b (a seal pattern is printed) (S5). As the sealing material 4, for example, an epoxy-based sealing material using a thermosetting resin such as XN-21S (manufactured by Mitsui Chemicals) is used. Further, in order to form a gap, the spacer 3 having a predetermined size is dispersed on the surface of the substrate 8b facing the substrate 8a (S6). Subsequently, the substrates 8a and 8b are heated to a temperature at which the sealing material 4 starts to cure (S7). Specifically, when XN-21S is used as the sealing material 4, the substrates 8a and 8b are heated to 190 ° C. Then, the substrates 8a and 8b are aligned while being heated, and the gap is controlled (S8). Next, the aligned substrates 8a and 8b whose gaps are controlled are held for a certain period of time, and the two substrates 8a and 8b are bonded together by completely curing the sealing material 4 (S9). Thereafter, the electrode plates 1a and 1b are divided, and the liquid crystal is injected into the sealed cell formed by the sealing material 4 by the reduced pressure impregnation injection method. Then, polarizing plates 6a and 6b are disposed on the outer surface of electrode plates 1a and 1b, and liquid crystal display element 10 in the present embodiment is completed.

  FIG. 3 is a cross-sectional view showing a configuration of a bonding apparatus used in the method for manufacturing a liquid crystal display element according to Embodiment 1 of the present invention. 4 is a schematic top view of the bonding apparatus in FIG. 3, and FIG. 5 is a schematic bottom view of the bonding apparatus in FIG.

  Referring to FIGS. 3 to 5, the bonding apparatus 20 is held on the surface plates 17 a and 17 b (heating and holding members and pressure members) for holding the substrates 8 a and 8 b and the surface plate 17 a. X-direction moving mechanisms 11a and 11b and y-direction moving mechanisms 12a and 12b for adjusting the position of the substrate 8a (position adjusting member), and a rotating mechanism for adjusting the position of the substrate 8b held on the surface plate 17b ( Gears) 13a and 13b (position adjusting members). A heater 14 is embedded in each of the surface plates 17a and 17b, whereby the surface plates 17a and 17b can hold the substrates 8a and 8b in a heated state.

  The heating and bonding (S7, S8) of the substrates 8a and 8b in the present embodiment are performed by the following method using the bonding apparatus 20 shown in FIGS.

  First, each of the electrode plates 1a and 1b is held on each of the surface plates 17a and 17b by adsorbing the substrates 8a and 8b through the suction holes 18a and 18b opened in each of the surface plates 17a and 17b. . And the board | substrates 8a and 8b are heated by the heater 14 embedded inside each of the surface plates 17a and 17b to the temperature which the sealing material 4 starts hardening. Next, the x direction (horizontal direction in FIG. 4) of the substrates 8a and 8b is aligned by the x direction moving mechanisms 11a and 11b, and the y direction (vertical direction in FIG. 4) of the substrates 8a and 8b is aligned by the y direction moving mechanisms 12a and 12b. ) Are aligned, and the rotation directions of the substrates 8a and 8b are aligned by the rotation mechanisms 13a and 13b. At this time, alignment marks are provided on the surfaces of the substrates 8a and 8b in advance, and the substrates 8a and 8b are easily aligned by observing them with the recognition cameras 15a to 15d provided on the upper surface of the surface plate 17a. Alignment is possible. Subsequently, a pressure of, for example, 0.2 to 0.3 MPa is applied to the substrates 8a and 8b using the surface plates 17a and 17b. As a result, the gap between the substrates 8a and 8b is reduced while the substrates 8a and 8b are bonded together. Then, when the gap between the substrates 8a and 8b reaches an optimum value, the substrates 8a and 8b are fixed and held for a certain time (for example, 5 minutes) until the sealing material 4 is completely cured. The substrate 8a and the substrate 8b are bonded together by the above method.

  According to the manufacturing method of the liquid crystal display element in the present embodiment, the substrate 8a and the substrate 8b are aligned and the gap is controlled in a state where the substrates 8a and 8b are heated to a temperature at which the sealing material 4 starts to cure. . For this reason, it is not necessary to heat the substrates 8a and 8b after the alignment between the substrates 8a and 8b and the gap control, so that the two aligned substrates may be shifted again due to the difference in thermal expansion between the substrates. Disappear. Further, since it is not necessary to irradiate the entire surface of the substrate with UV in order to cure the sealing material 4, it is possible to prevent the quality of the alignment films 7a and 7b from being lowered, and as a result, the reliability of the liquid crystal display element is lowered. The problem can be solved. For the above reasons, it is possible to suppress the pattern shift without degrading the reliability of the liquid crystal display element.

  Further, according to the method for manufacturing a liquid crystal display element in the present embodiment, as in the method for manufacturing a liquid crystal display element disclosed in Patent Document 1, the inside of the pressure variable tank is set for each bonding of a set of liquid crystal display elements. There is no need to switch between a vacuum state and an atmospheric pressure state. For this reason, the tact time at the time of bonding of two board | substrates can be shortened, and production efficiency can be improved.

(Embodiment 2)
FIG. 6 is a diagram showing a manufacturing process of the liquid crystal display element in the second embodiment of the present invention.

  With reference to FIG. 6, in this Embodiment, before board | substrate 8a, 8b is heated to the temperature which the sealing material 4 starts hardening (S7), temperature lower than the temperature which the sealing material 4 starts hardening. Thus, the substrates 8a and 8b are preheated (S7a).

  FIG. 7 is a diagram schematically showing a configuration of a bonding apparatus used in the method for manufacturing a liquid crystal display element in the second embodiment of the present invention.

  Referring to FIG. 7, laminating apparatus 30 according to the present embodiment includes preheating conveying members 21a and 21b (conveying) including belts 23a and 23b and a plurality of hot plates 22a and 22b moving on belts 23a and 23b. Part). Three hot plates 22a are arranged on the belt 23a, and for example, three hot plates 22b are arranged on the belt 23b. Each of the belts 23a and 23b flows in the direction of the surface plates 17a and 17b. The preheating conveyance members 21a and 21b preheat and convey the electrode plates 1a and 1b (substrate), and supply the electrode plates 1a and 1b to the surface plates 17a and 17b. Preheating (S7a) in the present embodiment is performed by the following method using a bonding apparatus 30 shown in FIG.

  The electrode plate 1a is placed on the hot plate 22a at one end of the belt 23a, and the electrode plate 1b is placed on the hot plate 22b at one end of the belt 23b. Here, after each of the first pair of electrode plates 1a and 1b is placed on each of the hot plates 22a and 22b, each of the second pair of electrode plates 1a and 1b is placed on the hot plates 22a and 22b. Time required for mounting on each substrate (conveyance tact time) and time required for bonding and bonding while the substrates 8a and 8b are heated on the surface plates 17a and 17b (bonding tact time) The electrode plates 1a and 1b are placed on the hot plates 22a and 22b in order at regular intervals so that the (time) becomes equal. For example, when the bonding tact time is 5 minutes, for example, the electrode plates 1a and 1b are sequentially placed on the hot plates 22a and 22b every 5 minutes. Then, after preheating on the hot plates 22a and 22b for 15 minutes, the electrode plates 1a and 1b are supplied to the surface plates 17a and 17b.

  In the method for manufacturing a liquid crystal display element in the present embodiment, the substrates 8a and 8b are preheated before heating.

  Thereby, when heating the board | substrates 8a and 8b to the temperature which the sealing material 4 begins to harden | cure, it will suffice to heat only slightly. For this reason, a difference in thermal expansion between the substrates 8a and 8b or in each of the substrates 8a and 8b due to a rapid temperature rise during heating is suppressed. Therefore, the occurrence of pattern deviation in the substrates 8a and 8b during the alignment and gap control of the substrates 8a and 8b is further suppressed. Further, when the substrates 8a and 8b are heated to a temperature at which the sealing material 4 starts to be cured, it is only necessary to slightly heat the substrates 8a and 8b, thereby shortening the heating time tact. Therefore, the manufacturing efficiency of the manufacturing method of the liquid crystal display device is improved.

  In the manufacturing method described above, the first pair of electrode plates 1a and 1b and the second pair of electrode plates 1a and 1b are sequentially placed on the preheating conveyance members 21a and 21b, and are sequentially conveyed to the surface plates 17a and 17b. doing. The conveyance tact time and the bonding tact time are equal.

  Thus, when the electrode plates 1a and 1b are sequentially conveyed to the surface plates 17a and 17b by the preheating conveying members 21a and 21b, the alignment, gap control, and bonding for the first pair of electrode plates 1a and 1b are completed. At the same time, the second pair of electrode plates 1a and 1b arrive at the surface plates 17a and 17b. Therefore, it is possible to eliminate a time loss from when the electrode plates 1a and 1b arrive at the surface plates 17a and 17b until alignment, gap control and bonding are performed. Therefore, a display element can be manufactured efficiently.

  In the manufacturing method, preheating is performed by placing the electrode plates 1a and 1b on the heated preheating conveying members 21a and 21b.

  Accordingly, when the electrode plates 1a and 1b are preheated before heating, the preheating of the electrode plates 1a and 1b and the conveyance to the surface plates 17a and 17b are performed at the same time, so that a display element can be manufactured more efficiently. can do. In addition, since the preheated time is constant for all the electrode plates 1a and 1b, the quality of the display element is easily kept constant.

  According to the display element manufacturing apparatus of the present embodiment, since the substrates 8a and 8b are supplied to the surface plates 17a and 17b while being preheated by the preheating transport members 21a and 21b, the temperature at which the sealing material 4 starts to cure. When the substrates 8a and 8b are heated up to, the temperature rise of the substrates 8a and 8b becomes small. For this reason, it is suppressed that the difference of thermal expansion arises between the board | substrate 8a and the board | substrate 8b, the inside of each board | substrate 8a, 8b, etc. by the rapid temperature rise at the time of a heating. Therefore, the occurrence of pattern deviation in the substrates 8a and 8b during the alignment and gap control of the substrates 8a and 8b is further suppressed. In addition, since it is not necessary to irradiate the entire surface of the substrate with UV in order to cure the sealing material, it is possible to prevent the quality of the alignment film from being deteriorated, thereby solving the problem that the reliability of the liquid crystal display element is lowered. be able to. For the above reasons, it is possible to suppress the pattern shift without degrading the reliability of the liquid crystal display element.

  In the first and second embodiments, the manufacturing method of the liquid crystal display element and the bonding apparatus for the liquid crystal display element have been described. However, the present invention is not limited to such a case. It can be applied as a manufacturing method of various display elements such as organic / inorganic EL display elements and a manufacturing apparatus of various display elements.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and is intended to include all modifications and variations within the scope and meaning equivalent to the scope of claims.

It is sectional drawing which shows the structure of the liquid crystal display element in Embodiment 1 of this invention. It is a figure which shows the manufacturing process of the liquid crystal display element in Embodiment 1 of this invention. It is sectional drawing which shows the structure of the bonding apparatus used for the manufacturing method of the liquid crystal display element in Embodiment 1 of this invention. FIG. 4 is a schematic top view of the bonding apparatus in FIG. 3. It is a lower surface schematic diagram of the bonding apparatus of FIG. It is a figure which shows the manufacturing process of the liquid crystal display element in Embodiment 2 of this invention. It is a figure which shows typically the structure of the bonding apparatus used for the manufacturing method of the liquid crystal display element in Embodiment 2 of this invention. It is a figure which shows the manufacturing process in the manufacturing method of the conventional liquid crystal display element.

Explanation of symbols

  1a, 1b electrode plate, 2a, 2b transparent electrode, 3 spacer, 4 sealant, 5 liquid crystal, 6a, 6b polarizing plate, 7a, 7b alignment film, 8a, 8b substrate, 10 liquid crystal display element, 11a, 11b movement in x direction Mechanism, 12a, 12b y-direction moving mechanism, 13a, 13b rotating mechanism, 14 heater, 15a-15d recognition camera, 17a, 17b surface plate, 18a, 18b suction hole, 20, 30 bonding device, 21a, 21b preheating conveying member 22a, 22b Hot plate, 23a, 23b Belt.

Claims (5)

An application step of applying a sealing material to the first substrate;
A position adjustment step of adjusting a bonding position between the first substrate and the second substrate in a state where the first substrate and the second substrate are heated to a temperature at which the sealing material starts to cure. When,
An interval adjustment step of adjusting an interval between the first substrate and the second substrate in a state where the first substrate and the second substrate are heated to a temperature at which the sealing material starts to cure;
A manufacturing method of a display element, comprising: a bonding step of bonding the first substrate and the second substrate by completely curing the sealing material after the position adjustment step and the interval adjustment step.   The method for manufacturing a display element according to claim 1, further comprising a preheating step of preheating the first substrate and the second substrate before the heating. The first and second substrates forming a first pair and the first and second substrates forming a second pair are sequentially placed on a transfer unit, and the position adjusting step and the interval adjusting step And a step of sequentially transporting to the region where the joining step is performed,
The time from placing the first pair on the transport unit to placing the second pair on the transport unit is the time required for the position adjusting step, the time required for the interval adjusting step, and the joining step. The method for manufacturing a display element according to claim 2, wherein the display element is equal to the total time.   The method for manufacturing a display element according to claim 3, wherein the preheating step is performed by placing the first substrate and the second substrate on the heated transport unit. A heating and holding member that holds each of the two substrates heated to a temperature at which the sealing material begins to cure;
A position adjusting member for adjusting the position of the two substrates held by the heating holding member;
A pressure member that pressurizes and bonds the two substrates;
A display element manufacturing apparatus comprising: a preheating conveyance member that preheats and conveys the two substrates and supplies the two substrates to the heating and holding member.

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