JP4720336B2 - Electro-optical device manufacturing method and electro-optical device - Google Patents

Description

  The present invention relates to a method for manufacturing an electro-optical device and an electro-optical device.

In general, many electro-optical devices such as liquid crystal devices and organic EL devices have a structure in which two substrates are bonded together. For example, the liquid crystal device has a configuration in which two substrates are bonded to each other so as to sandwich the liquid crystal. In the liquid crystal device, for example, a sealing material is formed on a large-sized substrate called a mother substrate, a liquid crystal material is sealed inside the sealing material, and two substrates are bonded to each other via the sealing material, and are bonded together. Manufactured by cutting the mother substrate (many pieces). In the step of forming the sealing material on the substrate, for example, a method of applying the sealing material in a frame shape so as to surround the electrode pattern formed on the substrate using a dispenser or the like is known. (For example, refer to Patent Document 1).
JP 2004-109448 A

However, when the sealing material is drawn in a rectangular ring shape, the sealing material is crushed and spread after the substrate is pressure-bonded, and the crushed sealing material spreads inward particularly at the corners of the sealing material. In addition, when the sealing material is pressed at the corners, the side portions near the corners of the sealing material are particularly affected, and the spread of the sealing material becomes uneven.
For this reason, there is a problem that a sufficient space that can be used as a display area cannot be secured inside the sealing material, or there is a problem that the substrate must be enlarged if a certain display area is to be secured. is there.
In view of the circumstances as described above, an object of the present invention is to provide a method of manufacturing an electro-optical device and an electro-optical device that can sufficiently secure a display area and can avoid an increase in the size of a substrate. There is.

  In order to achieve the above object, a method for manufacturing an electro-optical device according to the present invention is a method for manufacturing an electro-optical device in which a sealing material is sandwiched between a pair of substrates. A step of forming a rectangular annular sealing material on the substrate; and a step of bonding the pair of substrates facing each other, wherein the step of forming the sealing material includes at least one of four corners of the sealing material. In the step of providing a gap at some corners and bonding the pair of substrates facing each other, the pair of substrates is pressure-bonded until the gap is closed.

  In the present invention, the electro-optical device is a generic term including an electro-optical effect that changes the light transmittance by changing the refractive index of a substance due to an electric field, and a device that converts electric energy into optical energy. ing. Specifically, a liquid crystal display device using liquid crystal as an electro-optical material, an organic EL device using organic EL (Electro-Luminescence), an inorganic EL device using inorganic EL, a plasma display device using plasma gas as an electro-optical material, etc. There is. Furthermore, there are an electrophoretic display device (EPD), a field emission display device (FED: Field Emission Display device), and the like.

  According to the present invention, since the gap is provided at the four corners of the sealing material, when the pair of substrates are bonded and pressure-bonded, the crushed sealing material spreads so as to close the gap. Each side of the is not spread unevenly. Further, when the sides of the sealing material are joined together, the sealing material does not spread inside the corner portion, and the inside of each corner portion is formed at a right angle.

  As a result, it is possible to prevent the inner area of the sealing material from becoming narrower, to ensure a sufficient display area of the electro-optical device, and to increase the size of the substrate even when a certain display area is ensured. There is no need. When the substrates are bonded together, the sealing material is crushed and spreads, and the sides are bonded together without any gaps, so that the region inside the sealing material can be sealed. In particular, when a liquid crystal device is manufactured as an electro-optical device, the liquid crystal can be sealed in a region inside the sealing material, and leakage can be prevented.

In the step of forming the sealing material, the gap is preferably provided in a straight line.
According to the present invention, since the gap is provided in a straight line, the sealing material faces the surface so as to sandwich the gap. Thereby, since the surfaces of the sealing material are bonded to each other when the substrates are bonded together, it is possible to reliably bond the surfaces without a gap.

In the step of forming the sealing material, it is preferable that the gap is formed to have a width of 200 μm or less.
When considering the width, amount, and viscosity of a normal sealing material formed when manufacturing an electro-optical device, when the gap width is larger than 200 μm, the sides of the sealing material are bonded to each other when a pair of substrates are bonded together. May not fit together. If the width of the gap is set as in the present invention, the sealing material is bonded without gap when the pair of substrates are bonded together, so that the region inside the sealing material can be reliably sealed. The width of the gap is more preferably in the range of 5 μm to 50 μm.

In the step of forming the sealing material, the gap is preferably formed with a constant width.
When the width of the gap is formed to be constant, the end faces of the adjacent sides face each other in parallel at the corners of the sealing material. In this state, when the pair of substrates constituting the electro-optical device are bonded and bonded together, the sides of the sealing material spread by the bonding are bonded together without gaps, and the end faces facing each other are bonded together without waste. The inside of the corner becomes a high-precision right angle.

In the step of forming the sealing material, it is preferable that the gap is formed so that the width gradually decreases from the inside to the outside of the corner of the sealing material.
According to such a structure, since the space | interval of end surfaces becomes narrow outside the corner | angular part of a sealing material, when bonding a pair of board | substrate and crimping | bonding, the outer side of a corner | angular part becomes easy to unite | combine. Thereby, the area | region inside a sealing material can be sealed reliably.

In the step of forming the sealing material, it is preferable that the extending direction of the gap is inclined at about 45 ° with respect to the extending direction of the two sealing materials adjacent to each other at the corner portion.
According to such a configuration, the end surfaces of the sides of the sealing material face each other in an inclined state of 45 ° with respect to the extending direction of the sides. Therefore, the end surfaces are bonded together by bonding a pair of substrates. When bonded, a right angle is likely to be formed inside the corner.

Further, in the step of forming the sealing material, the end portion of the sealing material is formed at the corner portion so as to incline about 45 ° inward with respect to the outer surface of the rectangular annular region of the sealing material. Is preferred.
According to the present invention, since the corner of the sealing material is in a so-called state, when the pair of substrates constituting the electro-optical device are bonded and pressure-bonded, the corner portion of the sealing material does not have to spread outward. As a result, it is possible to prevent the frame area of the electro-optical device from being widened and to avoid an increase in size.

Moreover, it is preferable that the viscosity of the sealing material is in a range of 2 × 10 ⁵ cps to 2 × 10 ⁶ cps.
When the viscosity of the sealing material is 2 × 10 ⁶ cps or more, when the pair of substrates are bonded and pressure-bonded, the sealing material is too hard and the gap is not blocked. In addition, when the viscosity of the sealing material is 2 × 10 ⁵ cps or less, the sealing material spreads excessively when the pair of substrates are bonded and pressure-bonded. Furthermore, the malfunction which tears a seal | sticker by the liquid-crystal diffusion force at the time of liquid crystal enclosure arises. Within the scope of the present invention, when the pair of substrates are bonded and pressure-bonded, the sealing material spreads appropriately. The viscosity of the sealing material is more preferably in the range of 2 × 10 ⁵ cps to 1 × 10 ⁶ cps.

Further, it is preferable that a step of dropping an electro-optic material inside the rectangular annular sealing material is provided after the step of forming the sealing material.
According to the present invention, after the sealing material is formed as described above, the electro-optic material is dropped inside the sealing material, so that when the substrates are bonded, the electro-optic material leaks outside the sealing material. Can be avoided.

An electro-optical device according to another aspect of the present invention is manufactured by the above-described method for manufacturing an electro-optical device.
According to the present invention, a sufficient display area can be ensured when manufacturing an electro-optical device, and an increase in the size of the substrate can be avoided, so that the display area is wide and the cost performance per substrate is high. Therefore, an electro-optical device having a high value can be obtained.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the following drawings, the scale is appropriately changed to make each member a recognizable size.
FIG. 1 is a plan view showing the overall configuration of the liquid crystal device according to the present embodiment.
As shown in the figure, the liquid crystal device 1 is mainly composed of a liquid crystal panel 40 and a backlight 41. The liquid crystal panel 40 is provided so as to sandwich the liquid crystal 6 between the active matrix substrate 2 and the color filter substrate 3, and has a configuration in which the liquid crystal panel 40 is bonded via a seal material 4. In the present embodiment, an active matrix type liquid crystal device using a nonlinear element such as a thin film diode (TFD) or a thin film transistor (TFT) will be described as an example. The present invention can also be applied.

  The active matrix substrate 2 is a rectangular substrate formed of a transparent material such as glass or quartz. The display area D is an area where an image, a moving image, or the like is displayed. In the display area D, a pixel electrode (not shown) and a switching element intersect with each other. The color filter substrate 3 is a rectangular substrate formed of a transparent material such as glass or plastic. A light shielding layer (not shown) is provided on the color filter substrate 3, and a color filter having a red layer, a green layer, and a blue layer is provided corresponding to a region (pixel) surrounded by the light shielding layer. . An overcoat layer (not shown) is formed on the color filter substrate 3 so as to cover the color filter, and an alignment film (not shown) is formed on the overcoat layer.

  The sealing material 4 is formed of a material such as an epoxy resin, for example, and is provided in a rectangular frame shape so as to surround the display region D of the liquid crystal panel 40. In the sealing material 4, the end surfaces of the side 7, the side 8, the side 9 and the side 10 provided along the four sides of the display region D are joined by the corner 4a, the corner 4b, the corner 4c, and the corner 4d. It has a configuration. Side 7 and side 9 are parallel, and side 8 and side 10 are parallel. The inside of each corner | angular part 4a-4d is formed at right angle so that the corner | angular part of the display area D may be followed.

Next, a method for manufacturing the liquid crystal device 1 configured as described above will be described.
FIG. 2 is a flowchart showing a manufacturing process of the liquid crystal device 1. In the present embodiment, a method in which a plurality of liquid crystal devices are collectively formed using a mother substrate having a large area and separated into individual liquid crystal panels 40 by cutting will be described as an example.

  The color filter side mother substrate 50 (see FIG. 3 and the like) provided with color filters is formed by the steps from ST1 to ST6, and the active matrix side mother substrate provided with wiring, switching elements, etc. by the steps from ST11 to ST13. Is formed.

  First, the process of forming the color filter side mother substrate 50 (ST1 to ST6) will be described. An electrode and a color filter for each liquid crystal panel are formed on each display region D (see FIG. 3 and the like) of a large base material made of a light-transmitting material such as glass or plastic, and a flattening film is formed (ST1). Next, spacers and partition walls (not shown) for gap control are formed on the surface of the color filter side mother substrate 50 (ST2). The spacer is formed for each display region D. An alignment film is formed so as to cover the color filter formed on the color filter side mother substrate 50 (ST3), and a rubbing process is performed on the alignment film (ST4).

Next, the sealing material 4 is formed so as to surround the display area D of each color filter side mother substrate 50 (ST5). The process ST5 will be described in detail below.
First, as shown in FIG. 3, the side 7 of the sealing material 4 is formed by, for example, flexographic printing. At this time, as shown in FIG. 4, in the corner | angular part 4a, it forms so that the end surface 7a of the edge | side 7 may make an angle of 45 degrees with the extension line of the inner edge | side 7b. In addition, as schematically shown in FIG. 3, the end surface of the side 7 is formed so as to form an angle of 45 ° with the extended line of the inner side 7b in the corner portion 4d as well. In ST2, spacers and partition walls may be formed on the active matrix side mother substrate. Also in ST5, the sealing material 4 may be formed on the active matrix side mother substrate.

  Next, as shown in FIG. 5, the side 10 of the sealing material 4 is formed. The side 10 is formed in a direction perpendicular to the side 7. At this time, as shown in FIG. 6, in the corner 4 a, the end surface 10 a of the side 10 is formed so as to form an angle of 45 ° with the extension line of the side 10 b inside the side 10, and the end surface 7 a of the side 7 is formed. The side 10 is formed so that a gap 11 is formed between the end face 10 a of the side 10 and the side 10. The gap 11 is linearly formed so as to have a constant width L in a direction (45 ° direction) that bisects the right angle formed between the side 7 and the side 10. The width L of the gap 11 is preferably 200 μm or less, and more preferably in the range of 5 μm to 50 μm.

Next, as shown in FIG. 7, the remaining side 8 and side 9 of the sealing material 4 are formed. The corner 4d between the side 7 and the side 8, the corner 4c between the side 8 and the side 9, and the corner 4b between the side 9 and the side 10 have the same configuration as the gap 11, respectively. A gap 12, a gap 13, and a gap 14 are formed. The viscosity of the sealing material when forming the sealing material 4 is preferably 2 × 10 ⁶ cps or less, and more preferably in the range of 2 × 10 ⁵ cps to 1 × 10 ⁶ cps. Moreover, about the sealing material 4, you may perform the process of drawing the sealing material 4 with a dispenser, for example instead of forming by the flexographic printing method as mentioned above.

  Next, a liquid crystal is applied to the display area D surrounded by the sealing material (ST6). In ST6, liquid crystal is applied using, for example, a known liquid crystal dropping device (not shown). First, the color filter side mother substrate 50 is arranged in the liquid crystal dropping device, and the liquid crystal is discharged in the form of droplets, and a large number of them are continuously arranged on the surface of the color filter side mother substrate 50 to have a predetermined volume. A liquid film is formed.

Next, a process of forming the active matrix side mother substrate (ST11 to ST13) will be briefly described.
A scanning line is formed by a known method on each display area of the active matrix side mother substrate made of a light-transmitting material such as glass or plastic (the display area corresponds to the display area of the color filter side mother substrate 50). Then, a data line, an electrode, and the like are formed, and a planarizing film (not shown) is formed in the display area where the scan line, the data line, and the like are formed (ST11). After the planarization film is formed, an alignment film made of polyimide or the like is formed in each display region (ST12), and a rubbing process is performed on the alignment film (ST13).

  Next, the color filter side mother substrate 50 and the active matrix side mother substrate are bonded together and pressure-bonded (ST21). Both substrates are brought close to each other, aligned and pressure-bonded so that the display region of the active matrix side mother substrate and the display region D of the color filter side mother substrate 50 coincide with each other, and the sealing material is cured (ST22). Thereafter, scribe lines are formed on the two bonded substrates, and the liquid crystal panel is cut along the scribe lines (ST22) to form a plurality of liquid crystal panels. Each liquid crystal panel is cleaned (ST23), a drive driver or the like is mounted, and a backlight 41, a polarizing plate, or the like is attached as necessary to complete the liquid crystal device 1.

  Here, as shown in FIG. 8, when the sealing material 64 is formed in a rectangular frame shape without providing a gap (the chain line in FIG. 8), the seal is obtained when the color filter side mother substrate and the active matrix side mother substrate are pressure-bonded. When the material 64 is crushed and spread, the sides of the sealing material are pressed against each other at the corner portion 65 of the sealing material 64, and the corner portion 65 spreads inward. Due to this influence, the spread of each side 66, 67, 68, 69, particularly in the vicinity of the corner, becomes non-uniform. As a result, in the liquid crystal panel, the space that can be used as the display area is narrowed inside the sealing material 64, and the display area cannot be sufficiently secured.

  On the other hand, in the present embodiment, as shown in FIG. 9, the gaps 11, 12, 13, and 14 are provided at the corners 4 a, 4 b, 4 c, and 4 d of the sealing material 4, and the gaps are adjacent to each other. Since the sealing material 4 is formed so as to have a constant width L in a direction (45 ° direction) that bisects the right angle formed between the sides to be colorized (the dashed line in FIG. 9), the color filter side mother When the substrate 50 and the active matrix-side mother substrate are bonded together, the end faces of the sides 7, 8, 9, 10 of the sealing material 4 are bonded to each other at the corners 4a to 4d without any gaps. The sides do not press against each other, and the spread of the sides 7 to 10 of the sealing material 4, particularly in the vicinity of the corners, does not become uneven. Moreover, the inside of each corner | angular part 4a-4d is formed in a right angle, and the sealing material 4 does not spread inside the said corner | angular part 4a-4d. Thereby, a sufficient space inside the sealing material 4 can be secured as the display region D, and even when the constant display region D is secured, it is not necessary to enlarge the color filter side mother substrate 50.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. Similar to the first embodiment, in the following drawings, the scale is appropriately changed to make each member a recognizable size. Moreover, about the component same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the present embodiment, the process for forming the corners of the sealing material 4 is different from that in the first embodiment, and thus this point will be mainly described.

FIG. 10 shows a state where the sealing material 4 is formed on the color filter side mother substrate 50, and corresponds to FIG. 6 in the first embodiment.
As shown in the figure, when the side 7 of the sealing material 4 is formed using a dispenser or the like, for example, an angle of 60 ° is formed between the corner 7a and the side 7b inside the side 7 for example. Thus, the end face 7a is formed. Further, when the side 10 is formed, it is larger than 0 ° (direction perpendicular to the Y direction of the sealing material 4) and 90 ° (parallel to the Y direction of the sealing material 4) between the side 10b and the inner side 10b. The end surface 10a of the side 10 is formed so as to form an arbitrary angle in a range smaller than the angle (for example, 60 degrees), and between the end surface 7a of the side 7 and the end surface 10a of the side 10 The gap 111 is formed. The gap 111 is formed in a straight line so as to have a constant width L in a direction of 60 ° with respect to the extending direction of the side 7. The width L (constant) of the gap 111 is preferably 200 μm or less, more preferably in the range of 5 μm to 50 μm, as in the first embodiment. Note that the viscosity of the sealing material 4, like the first embodiment, is preferably 2 × ¹⁰ 6 cps or less, still preferably be in the range of ^{2 × 10 5 cps~1 × 10 6} cps. In addition, each side and each gap | interval are formed so that it may have the structure similar to the corner | angular part 4a also about another corner | angular part.

  Even if each gap is formed so that each gap has an inclination of 60 ° with respect to each side at each corner of the sealing material 4 as in this embodiment, the color filter side mother substrate 50 and the active matrix side When the mother substrate is bonded and pressure-bonded, the sealing material 4 spreads, the end surfaces of the sides of the sealing material 4 are joined together without any gaps, and the sides of the sealing material 4 are not pressed against each other. The spread of each side of the sealing material 4, particularly in the vicinity of the corners, does not become uneven. Further, the inside of each corner is formed at a right angle, and the sealing material 4 does not spread inside the corner. Thereby, the space inside the sealing material 4 can be sufficiently secured as the display area D, and even when the fixed display area D is secured, it is not necessary to enlarge the color filter side mother substrate 50.

(Third embodiment)
Next, a third embodiment of the present invention will be described. Similar to the first embodiment, in the following drawings, the scale is appropriately changed to make each member a recognizable size. Moreover, about the component same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the present embodiment, the process for forming the corners of the sealing material 4 is different from that in the first embodiment, and thus this point will be mainly described.

FIG. 11 shows a state in which a sealing material is formed on the color filter side mother substrate 50, and corresponds to FIG. 6 in the first embodiment.
As shown in the figure, when the side 7 of the sealing material 4 is formed using a dispenser or the like, for example, between the corner 7 a and the side 7 b inside the side 7, about 22.5 ° to 45 °. The end surface 7a is formed so as to form an arbitrary angle within the range of °, for example, an angle of 30 °. Further, when the side 10 is formed, an arbitrary angle within the range of about 22.5 ° to 45 ° with respect to the side 10b inside the side 10 is formed, for example, 30 ° similarly to the corner 4a. In this way, the end surface 10 a is formed, and the gap 211 is formed between the end surface 7 a of the side 7 and the end surface 10 a of the side 10. That is, the gap 211 is formed in a wedge shape so as to gradually narrow from the inside to the outside of the corner 4a. As for the width L of the gap 211, the width L1 of the widest portion of the wedge shape is preferably 200 μm or less. Further, it is more preferable that the width L1 of the widest portion and the width L2 of the narrowest portion of the wedge shape are in the range of 5 μm to 50 μm. Note that the viscosity of the sealing material 4, like the first embodiment, is preferably 2 × ¹⁰ 6 cps or less, still preferably be in the range of ^{2 × 10 5 cps~1 × 10 6} cps. In addition, each side and each gap | interval are formed so that it may have the structure similar to the corner | angular part 4a also about another corner | angular part.

  According to the present embodiment, since the outside of each corner of the sealing material 4 is narrow, when the color filter side mother substrate 50 and the active matrix side mother substrate are bonded together, each corner of the sealing material 4 The outside will be more securely attached. Thereby, leakage of the liquid crystal can be prevented. Since the interval between the end faces is narrow outside the corners of the sealing material 4, when the color filter side mother substrate 50 and the active matrix side mother substrate are bonded and bonded together, the outsides of the corners are easily attached. Become. Thereby, the area | region inside the sealing material 4 can be sealed reliably.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. Similar to the first embodiment, in the following drawings, the scale is appropriately changed to make each member a recognizable size. Moreover, about the component same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the present embodiment, the process for forming the corners of the sealing material 4 is different from that in the first embodiment, and thus this point will be mainly described.

  FIG. 12 shows a state in which a sealing material is formed on the color filter side mother substrate 50, and corresponds to FIG. 6 in the first embodiment.

  As shown in the figure, when forming the side 7 and the side 10 of the sealing material 4 using, for example, a dispenser or the like, the outer side of the corner portion of the sealing material 4 is shaped so as to have a corner. Also good. Hereinafter, the corner 4a will be described as an example, but the other corners are assumed to have the same configuration. That is, as shown in FIG. 12, in the corner 4a, a gap 311 is formed between the end surface 7a of the side 7 and the end surface 10a of the side 10, and the outside of the end surface 7a of the side 7 and the end surface 10a of the side 10 ( The sealing material 4 is formed so that, for example, an angle of 45 ° is formed between the side 7 c and 10 c outside the side 7 and the side 10, respectively, on the side opposite to the display region D).

  Here, for example, as shown in FIG. 13, when the sealing material 360 is formed so that the outer corners of the corner portion 361 are not removed (the chain line in FIG. 13), the color filter side mother substrate and the active matrix side mother substrate And the corner portion 361 of the sealing material 360 may spread outward. When the corner portion 361 of the sealing material 360 spreads outside, the non-display area (frame area) outside the liquid crystal panel becomes wide, and the liquid crystal panel becomes large when trying to secure a display area with a predetermined area.

  On the other hand, according to the present embodiment, as shown in FIG. 14, the outside of the end surface 7 a and the end surface 10 a at the corner 4 a is, for example, 45 ° inside with respect to the extending direction of the side 7 and the side 10, respectively. Since it is inclined (one-dot chain line in FIG. 14), when the color filter side mother substrate 50 and the active matrix side mother substrate are bonded together, the sealing material 4 does not have to spread outward. Thereby, it is possible to prevent the frame area of the liquid crystal panel from becoming wide, and it is possible to avoid an increase in the size of the liquid crystal panel.

The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention.
For example, as the means for forming the sealing material, the flexographic printing method has been described as an example in each of the above-described embodiments. However, the present invention is not limited to this. For example, even when the sealing material is printed by a dispenser or the like. The application of the present invention is possible.

  In addition to the liquid crystal device described above, as an electro-optical device, an organic EL device, an inorganic EL device, a plasma display device, an electrophoretic display device, a field emission display device, etc., which are formed by bonding a pair of substrates through a sealing material The present invention can also be applied to.

1 is a plan view showing a configuration of a liquid crystal device according to a first embodiment of the present invention. 6 is a flowchart showing a method for manufacturing the liquid crystal device according to the embodiment. FIG. 6 is a diagram illustrating a manufacturing process of a liquid crystal device according to the embodiment (part 1); FIG. 6 is a diagram (part 2) illustrating a manufacturing process of the liquid crystal device according to the embodiment. FIG. 4 is a diagram showing a manufacturing process of a liquid crystal device according to the embodiment (No. 3). FIG. 6 is a diagram (part 4) illustrating a manufacturing process of the liquid crystal device according to the embodiment. FIG. 5 is a view showing a manufacturing process of a liquid crystal device according to the embodiment (No. 5). The top view which shows the manufacturing process of a liquid crystal device (sealing shape of the liquid crystal device after pressure bonding). FIG. 6 is a view showing a manufacturing process of a liquid crystal device according to the embodiment (No. 6). The figure which shows the manufacturing process of the liquid crystal device which concerns on 2nd Embodiment of this invention. The figure which shows the manufacturing process of the liquid crystal device which concerns on 3rd Embodiment of this invention. The figure which shows the manufacturing process of the liquid crystal device which concerns on 4th Embodiment of this invention (the 1). The top view which shows the manufacturing process of a liquid crystal device (sealing shape of the liquid crystal device after pressure bonding). FIG. 14 is a diagram (No. 2) showing a manufacturing process of a liquid crystal device according to the fourth embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal device 3 ... Color filter board | substrate 4 ... Sealing material 4a, 4b, 4c, 4d ... Corner | angular part 7, 8, 9, 10 ... Side 7a, 10a ... End surface 11, 12, 13, 14, 111, 211, 311 ... Gap 40 ... Liquid crystal panel 41 ... Backlight 50 ... Color filter mother board

Claims (9)

A method of manufacturing an electro-optical device in which a sealing material is sandwiched between a pair of substrates,
Forming a rectangular annular sealing material on one of the pair of substrates;
And bonding the pair of substrates facing each other,
Wherein in the step of forming a sealing material, Rutotomoni provided a gap at least part of the corners of the four corners of the sealing material, a rectangular ring of the first side and the second side constituting the corner Form the outer corners to be cut off,
Wherein the pair of substrates are opposed to and bonded process, with you close the gap, the edges and sides extending respectively corresponding to said second side corresponding to said first side when the gap was closed Then, the pair of substrates are pressure-bonded so that the sealing material does not spread outside the rectangular ring with respect to a predetermined portion of the intersecting corner .   The method of manufacturing an electro-optical device according to claim 1, wherein in the step of forming the sealing material, the gap is provided linearly.   The method of manufacturing an electro-optical device according to claim 1, wherein in the step of forming the sealing material, the gap is formed to have a width of 200 μm or less.   4. The method of manufacturing an electro-optical device according to claim 1, wherein in the step of forming the sealing material, the gap is formed with a constant width. 5.   2. The electro-optical device manufacturing method according to claim 1, wherein, in the step of forming the sealing material, the gap is formed so that a width gradually decreases from an inner side to an outer side of a corner portion of the sealing material. Method.   The step of forming the sealing material is characterized in that the extending direction of the gap is formed so as to be inclined by about 45 ° with respect to the extending direction of two adjacent sealing materials at the corners. The method for manufacturing an electro-optical device according to claim 1.   In the step of forming the sealing material, an end portion of the sealing material is formed at the corner portion so as to be inclined by about 45 ° inward with respect to an outer surface of the rectangular annular region of the sealing material. The method of manufacturing an electro-optical device according to claim 1. 8. The method of manufacturing an electro-optical device according to claim 1, wherein a viscosity of the sealing material is in a range of 2 × 10 ⁵ cps to 2 × 10 ⁶ cps. .   9. The method according to claim 1, further comprising a step of dropping an electro-optic material inside the rectangular annular sealing material after the step of forming the sealing material. Manufacturing method of electro-optical device.

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