JP2002357799A - Method for manufacturing liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid crystal display element at a low cost and with an excellent manufacturing yield. SOLUTION: Marks 71 , 72 are formed on the periphery of a liquid crystal display substrate 1. On the other hand, on a transparent electrode substrate 8 marks 91 , 92 are formed on positions corresponding to the marks 71 , 72 and marks 101 , 102 existing outside the space corresponding to the shape of the liquid crystal display substrate 1 with a specified relation to the marks 91 , 92 are formed. The liquid crystal display substrate 1 and the transparent electrode substrate 8 are stuck to each other using the marks 71 , 72 and the marks 91 , 92 so as to form a jointed substrates body 11. Subsequently the jointed substrates body 11 is contained between rectangular substrates 13 and 15. Notched groove lines S1 , S2 extending from ends of the rectangular substrates 13 and 15 to the other ends are formed on the substrates 1, 8 taking the marks 101 , 102 as standards. Further the substrates are cracked along the notched groove lines S1 , S2 so as to manufacture liquid crystal cell bars 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device.

[0002]

2. Description of the Related Art FIG. 8 is a sectional view showing a general liquid crystal display device. 8, (A) is a side view of the liquid crystal display element,
(B) is a sectional view as seen from the direction of arrow MM in (A).
As shown in FIG. 8A, the liquid crystal display element 21 includes a liquid crystal cell 22 and a liquid crystal layer 19 filled in the liquid crystal cell 22. The liquid crystal cell 22 includes a liquid crystal display substrate 23 and a transparent electrode substrate 24 bonded together at a fixed gap. FIG.
As shown in (B), on the liquid crystal display substrate 23, a liquid crystal display portion 4 including a rectangular pixel electrode region 2 and a relay terminal 3 connected to an external circuit (not shown) is formed. The liquid crystal display substrate 23 and the transparent electrode substrate 24 are
Are bonded to each other by a seal material pattern 6 formed in a frame shape on the outer peripheral edge of the frame.

[0005] The sealing material pattern 6 is formed on the outer periphery of four sides of the pixel electrode region 2, one of which has a liquid crystal injection port 5. Further, in the pixel electrode region 2, spacer balls made of glass or the like for keeping the gap between the liquid crystal display substrate 23 and the transparent electrode substrate 24 constant are scattered.
In the figure, a rectangular area surrounded by a broken line on the liquid crystal display substrate 23 is a display portion of the pixel electrode area 2. Liquid crystal layer 19
Is injected into the sealing material pattern 6 from the liquid crystal injection port 5, and a sealing material 20 for sealing the liquid crystal layer 19 is formed in the liquid crystal injection port 5.

Next, a method of manufacturing the liquid crystal display device will be described with reference to FIGS. FIG. 9 is a diagram showing a first step of a conventional method for manufacturing a liquid crystal display element. FIG.
3A is a plan view of the large-sized liquid crystal display substrate, and FIG. FIG.
FIG. 3 is a view showing a second step of the conventional method for manufacturing a liquid crystal display element. 10A is a plan view as viewed from the large transparent electrode substrate side, and FIG. 10B is a cross-sectional view as viewed from the direction of arrow MM in FIG. FIG. 11 is a view showing a third step of the conventional method for manufacturing a liquid crystal display element. 11, (A) is a plan view of the liquid crystal cell bar as viewed from above, and (B) is an arrow MM of (A).
It is the side view seen from the direction. FIG. 12 illustrates a method for manufacturing a liquid crystal cell. 12A is a side view of the liquid crystal cell, and FIG. 12B is a cross-sectional view as viewed from the direction of arrow MM in FIG. Here, a case where four liquid crystal display elements are manufactured will be described, but the same applies to a case where four or more liquid crystal display elements are manufactured.

(First Step) As shown in FIGS. 9A and 9B, a plurality of pixel electrode regions 2 are formed on a large disc-shaped liquid crystal display substrate 1 made of Si and having an orientation flat O in advance. 2,
After forming the liquid crystal display portions 4, 4, 4, 4 composed of 2, 2 and the relay terminals 3, 3, 3, 3 in a matrix at a predetermined pitch, a sealing material is applied on the large liquid crystal display substrate 1. .
The alignment marks 25 ₁ and 25 ₂ are formed near the outer peripheral edge of the large liquid crystal display substrate 1. Next, a photoresist pattern (not shown) is formed on the sealing material, and the liquid crystal injection port 5 surrounding the pixel electrode regions 2, 2, 2, 2 and partially opening it is formed by photolithography and etching. A plurality of sealant patterns 6, 6, 6, 6 having 5, 5, 5, 5 are formed such that the liquid crystal injection ports 5, 5, 5, 5 face the same direction. Thereafter, spacer balls made of glass or the like are scattered in the plurality of pixel electrode regions 2, 2, 2, 2.

(Second Step) Next, as shown in FIGS. 10A and 10B, alignment marks 26 ₁ , 26 for aligning with the alignment marks 25 ₁ , 25 _{2 of} the large liquid crystal display substrate 1 in advance. _A large transparent electrode substrate 8 made of glass on which an alignment mark 2 is formed is prepared.
The large transparent electrode substrate 8 is attached to the large liquid crystal display substrate 1 such that 6 ₁ and 26 ₂ overlap the alignment marks 25 ₁ and 25 _2.
Placed on the large transparent electrode substrate 8 and the large liquid crystal display substrate 1
After the positioning, the large transparent electrode substrate 8 is pressurized from the side thereof, and the large transparent electrode substrate 8 and the large liquid crystal display substrate 1 bonded together with a predetermined gap are integrated and cured. Although the large liquid crystal display substrate 1 and the large transparent electrode substrate 8 have the same size, in FIG. 10A, for convenience of illustration, the large liquid crystal display substrate 1 is shown smaller than the large transparent electrode substrate 8. I have.

The notch groove lines P ₁ , P ₁ having a predetermined pitch in one direction in which the liquid crystal injection ports 5, 5, 5, 5 are exposed from the large transparent electrode substrate 8 side with the orientation flat O as a reference. _1, to form a P _1. On the other hand, the notched groove lines P ₁ , P ₁ , P ₁
Are formed at positions corresponding to the notch groove lines P ₂ , P ₂ , P ₂ .

(Third Step) Thereafter, as shown in FIGS. 11A and 11B, the notched groove lines P ₁ , P ₁ ,
A strip-shaped liquid crystal cell bar 27 is manufactured by cutting from P ₁ , P ₂ , P ₂ , and P ₂ by a cleavage device (not shown).

(Fourth Step) Thereafter, as shown in FIG. 12, after injecting the liquid crystal layer 19 from the liquid crystal injection port 5 of the liquid crystal cell bar 27, the liquid crystal injection port 5 is sealed with a sealing material 20, and Notch groove lines P ₁ , P ₁ , P from both sides of the cell bar 27
₁ , P ₂ , P ₂ , a notch groove line (not shown) is formed in a direction orthogonal to P ₂ , and cut from the not shown groove line by a cleavage device (not shown). Next, as shown in FIG. 8, the liquid crystal display element 21 is manufactured by relatively shifting the liquid crystal display substrate 23 and the transparent electrode substrate 24 so that the relay terminals 3 are exposed. Here, the liquid crystal display substrate 23 shown in FIG. 8 is cut out from the large liquid crystal display substrate 1, and the transparent electrode substrate 24 is cut out from the large transparent electrode substrate 8.

[0010]

However, the conventional method for manufacturing a liquid crystal display device has the following problems.
Notch groove lines P ₁ , P ₁ , (3rd step)
The orientation flat O is used as a reference for forming P ₁ , P ₂ , P ₂ , and P _2.
, The production yield of the liquid crystal display element 21 was poor. That is, when the large liquid crystal display substrate 1 becomes large,
Since the linear portion of the orientation flat O has undulations of about several tens of microns, the shape of the liquid crystal injection port 5 varies when the liquid crystal cell bar 27 is manufactured, so that the liquid crystal layer 19 cannot be uniformly injected. Therefore, the orientation flat O cannot be used as a reference. As a countermeasure, it is conceivable to form a reference alignment mark on the surface of the large-sized liquid crystal display substrate 1. However, the number of steps increases, thereby lowering the productivity and increasing the manufacturing cost of the liquid crystal display element 21.

The large liquid crystal display substrate 1 and the large transparent electrode substrate 8 may be slightly warped. In this case, since the gap when these substrates are bonded is not constant over the whole, the shape of the liquid crystal injection port 5 becomes various as described above, and the liquid crystal layer 19 is not uniformly injected. The manufacturing yield of the liquid crystal display element 21 has been deteriorated.
Therefore, the present invention has been made in view of the above problems, and improves productivity, reduces manufacturing costs, and reduces the manufacturing yield even when a large liquid crystal display substrate and a large transparent electrode substrate are warped. An object is to provide a method for manufacturing a favorable liquid crystal display element.

[0012]

According to a first aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, comprising: a liquid crystal having a pixel electrode region on a large liquid crystal display substrate having a first alignment mark formed on an outer peripheral portion thereof in advance. The display portions are formed in a matrix with a predetermined pitch, and the sealing material pattern surrounding the pixel electrode region of each liquid crystal display portion and having a liquid crystal inlet is arranged such that the liquid crystal inlets are aligned in the column direction or the row direction. Forming, and a second alignment mark for positioning with the first alignment mark and a portion outside a size corresponding to the shape of the large-sized liquid crystal display substrate,
A third alignment mark having a predetermined relationship with the second alignment mark;
Bonding the large-sized liquid crystal display substrate on the large-sized transparent electrode substrate on which the alignment mark is formed, by bonding the first alignment mark and the second alignment mark through the plurality of sealing material patterns, and bonding the substrates. Forming a body, a first concave portion having the same shape and the same depth as the large liquid crystal display substrate, and a second concave portion having the same shape and the same thickness as the large transparent electrode substrate on the first concave portion. A first rectangular substrate having a concave portion composed of a concave portion is prepared, and the large-sized liquid crystal display substrate is opposed to the first rectangular substrate,
With the large transparent electrode substrate side facing upward, the substrate assembly is housed in a concave portion of the first rectangular substrate, and each of the liquid crystal display units in a column direction or a row direction is positioned on the basis of the third alignment mark. Forming a first cutout groove line on the large transparent electrode substrate from one end of the first rectangular substrate to the other end along a liquid crystal injection port;
After taking out the substrate joined body from the concave portion of the rectangular substrate,
A third recess having the same shape and the same depth as the thickness of the large transparent electrode substrate and a fourth recess having the same shape and the same thickness as the large liquid crystal display substrate formed on the third recess. 2. A rectangular substrate is prepared, the large transparent electrode substrate on which the first cutout groove line is formed is opposed to the second rectangular substrate, and the large liquid crystal display substrate is directed upward. The joined body is housed in the concave portion of the second rectangular substrate, and from one end of the second rectangular substrate toward the other end at a position corresponding to the first cutout groove line with reference to the third alignment mark. Forming a second notch groove line on the large-sized liquid crystal display substrate;
After taking out the substrate joined body from the concave portion of the rectangular substrate,
Cutting the liquid crystal cell bar by cutting from the first and second notch groove lines, injecting a liquid crystal layer into a liquid crystal injection port opened from the liquid crystal cell bar, sealing the liquid crystal layer, and further sealing the first and the second liquid crystal cells; A step of cutting in a direction orthogonal to the two notch groove lines. According to a second aspect of the present invention, a first rectangular substrate having a first concave portion having the same shape and the same depth as a large liquid crystal display substrate having a first alignment mark formed on an outer peripheral portion in advance is prepared. A first notch groove line having a predetermined pitch from one end to the other end of the first rectangular substrate is stored in a first concave portion of the first rectangular substrate with reference to the first alignment mark. After forming on the display substrate, removing it from the first concave portion of the first rectangular substrate, and then forming a liquid crystal display portion having pixel electrode regions in a line at a predetermined pitch between the first notch groove lines. Forming a sealing material pattern surrounding the pixel electrode region and having a liquid crystal injection port such that the liquid crystal injection ports are aligned in a column direction or a row direction;
A second alignment mark for alignment with the alignment mark and a third alignment mark which is located outside the size corresponding to the shape of the large-sized liquid crystal display substrate and has a predetermined relationship with the second alignment mark are formed. A second rectangular substrate having a second concave portion having the same shape and the same depth as the large transparent electrode substrate, and storing the large transparent electrode substrate in the concave portion of the second rectangular substrate; After forming a second notch groove line on the large transparent electrode substrate at a position corresponding to the first notch groove line from one end to the other end of the second rectangular substrate, (2) a step of taking out the second alignment mark from the second concave portion of the rectangular substrate, and positioning the first alignment mark and the second alignment mark on the large liquid crystal display substrate. Bonding a large-sized transparent electrode substrate through the sealing material pattern to form a substrate assembly; cleaving from the first and second notched groove lines to form a liquid crystal cell bar; After injecting the liquid crystal layer into the liquid crystal injection port opened from
And a step of cutting in a direction perpendicular to the first and second cutout groove lines. According to a third aspect of the present invention, a first rectangular substrate having a first concave portion having the same shape and the same depth as a large liquid crystal display substrate having a first alignment mark formed on an outer peripheral portion in advance is prepared. Housed in the first recess, and with reference to the first alignment mark,
Forming a first notch groove line of a predetermined pitch from one end to the other end of the first rectangular substrate on the large-sized liquid crystal display substrate, and then removing the groove from the first concave portion of the first rectangular substrate; Next, a liquid crystal display portion having pixel electrode regions in a line at a predetermined pitch is formed between the first cutout groove lines, and a sealing material pattern surrounding each pixel electrode region and having a liquid crystal injection hole is formed by the liquid crystal injection hole. A step of forming them so as to be aligned in the column direction or the row direction, and a second alignment mark for aligning with the first alignment mark and a portion outside the size corresponding to the shape of the large-sized liquid crystal display substrate, The large liquid crystal display substrate is placed on the large transparent electrode substrate on which the third alignment mark having a predetermined relationship with the second alignment mark is formed, by the first alignment mark. Aligning the second alignment mark with the second alignment mark and bonding the second alignment mark via the sealing material pattern to form a bonded substrate; and forming a second concave portion having the same shape and the same depth as the thickness of the large-sized liquid crystal display substrate. This second
A second rectangular substrate having a third concave portion having the same shape and the same thickness as the large transparent electrode substrate formed on the concave portion is prepared, and the substrate bonded body is provided on the second rectangular substrate side. The large-sized liquid crystal display substrates are opposed to each other, the large transparent electrode substrate side is directed upward, and the substrate assembly is housed in the concave portion of the second rectangular substrate. Forming a second notch groove line on the large transparent electrode substrate from one end to the other end of the second rectangular substrate at a position corresponding to the first notch groove line along each liquid crystal injection port in And the second step
After taking out the substrate joined body from the concave portion of the rectangular substrate,
A step of preparing a liquid crystal cell bar by cutting from the first and second notch groove lines, injecting a liquid crystal layer into a liquid crystal injection port opened from the liquid crystal cell bar, sealing the liquid crystal layer, further sealing the first and the Cutting in a direction orthogonal to the second notch groove line.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments relating to a method for manufacturing a liquid crystal display device according to the present invention will be described below with reference to the drawings. FIG. 1 is a process chart showing a first process of the first embodiment of the present invention. 1A is a plan view of a large-sized liquid crystal display substrate, and FIG. 1B is a cross-sectional view as viewed from the direction of arrow MM in FIG. FIG. 2 is a process chart showing a second process of the first embodiment of the present invention. 2A is a plan view as viewed from the large transparent electrode substrate side, and FIG. 2B is a cross-sectional view as viewed from the direction of arrow MM in FIG. FIG. 3 is a process diagram showing a state in which a notched groove line is formed in the large-sized transparent electrode substrate in the third step of the first embodiment of the present invention. 3A is a plan view as viewed from the large transparent electrode substrate side, and FIG. 3B is a cross-sectional view as viewed from the direction of arrow MM in FIG. 3A. FIG. 4 is a process diagram showing a state in which a notched groove line is formed in the large-sized liquid crystal display substrate in the third step of the first embodiment of the present invention. In FIG. 4, (A) is a plan view seen from the large liquid crystal display substrate side,
(B) is a sectional view as seen from the direction of arrow MM in (A).
FIG. 5 is a process chart showing a fourth process of the first embodiment of the present invention. 5, (A) is a plan view of a liquid crystal cell bar,
(B) is a side view seen from the arrow MM direction of (A).
FIGS. 6A and 6B are views showing a rectangular substrate accommodating a large-sized liquid crystal display substrate according to the second embodiment of the present invention, wherein FIG. 6A is a plan view and FIG. FIGS. 7A and 7B are views showing a rectangular substrate accommodating a large-sized transparent electrode substrate according to the second embodiment of the present invention, wherein FIG. 7A is a plan view and FIG. The same components as those of the related art are denoted by the same reference numerals, and description thereof will be omitted. Here, a case where four liquid crystal display elements are manufactured in the same manner as the related art will be described.

(First Step) As shown in FIGS. 1A and 1B, a plurality of pixel electrode regions 2 are formed on a large disc-shaped liquid crystal display substrate 1 made of Si and having an orientation flat O in advance. 2,
After forming the liquid crystal display portions 4, 4, 4, 4 composed of 2, 2 and the relay terminals 3, 3, 3, 3 in a matrix at a predetermined pitch, a sealing material is applied on the large liquid crystal display substrate 1. .
Next, a photoresist pattern (not shown) is formed on the sealing material, and the pixel electrode regions 2, 2, 2, and 2 of the liquid crystal display units 4, 4, 4, 4 are surrounded by photolithography and etching. A plurality of sealing material patterns 6 having liquid crystal injection ports 5, 5, 5, 5 partially opened;
6, 6, 6 are formed such that the liquid crystal injection ports 5, 5, 5, 5 face the same direction. The liquid crystal injection ports 5, 5, 5,
The direction of 5 may be aligned in either the column direction or the row direction. Further, alignment marks 7 ₁ and 7 ₂ are formed on the periphery of the large liquid crystal display substrate 1.

(Second Step) On the other hand, as shown in FIG. 2, a disk-shaped large transparent electrode substrate 8 larger than the diameter of the large liquid crystal display substrate 1 is prepared, and the alignment marks 7 on the large liquid crystal display substrate 1 are prepared. Arrangement marks 9 ₁ and 9 ₂ that can be aligned with ₁ and 7 ₂ are formed. Furthermore, a large-sized liquid crystal display alignment marks 9 ₁ portion of the outer than the size corresponding to the diameter of the large-size transparent electrode substrate 8 substrate 1, 9 ₂ and the alignment mark 10 _1, 10 ₂ having a predetermined positional relationship .

Thereafter, the large-sized transparent electrode substrate 8 is aligned with the alignment marks 7 ₁ and 7 ₂ of the large-sized liquid crystal display substrate 1 and the alignment marks 9 ₁ and 9 _{2 of} the large-sized transparent electrode substrate 8. It is placed on the liquid crystal display substrate 1. Furthermore,
Pressure is applied from the large transparent electrode substrate 8 side, and the large transparent electrode substrate 8 is pressed.
Is cured together with the large-sized liquid crystal display substrate 1 to produce a circular substrate assembly 11 in which these substrates are integrated with a predetermined gap.

(Third Step) Next, as shown in FIG. 3, a transparent rectangular substrate 13 having a disk-shaped recess 12A having the same depth as the circular substrate assembly 11 is prepared. At the bottom of the rectangular substrate 13, a through hole 14 for evacuation is formed. The concave portion 12A has the same diameter and the same depth as the large-sized liquid crystal display substrate 1, and the concave portion 12 ₁ has the same diameter as the large-sized transparent electrode substrate 8 on the concave portion 12 ₁ . and the recesses 12 ₂ thickness added depth of the sealant pattern 6 to a thickness having a two-stage structure laminated. On this occasion,
Since the thickness of the sealing material pattern 6 is extremely thin, the concave portion 12 ₂
May be the thickness of the large transparent electrode substrate 8. In FIG. 3, the thickness of the sealing material pattern 6 is shown in an enlarged manner.

The large-sized transparent electrode substrate 8 side faces upward, the large-sized liquid crystal display substrate 1 side faces the concave portion 12A of the rectangular substrate 13, and the circular substrate assembly 11 is housed in the concave portion 12A. Then, the circular substrate assembly 11 is fixed in the recess 12A of the rectangular substrate 13 by evacuating the through-hole 14 with a vacuum pump (not shown).

Thereafter, the alignment marks 10 ₁ , 10 ₂
Using a scriber (not shown), a notch groove line S is formed from one end of the rectangular substrate 13 to the other end at a pitch at which the liquid crystal display portions 4 are arranged in a direction in which the liquid crystal injection ports 5, 5 are exposed. ₁ , S ₁ and S ₁ are formed. After this,
The evacuation is stopped, and the circular substrate assembly 11 is moved to the rectangular substrate 1.
Take out from the inside of the third recess 12A.

Next, as shown in FIG.
11 and a disc-shaped recess 12B having the same depth as
A transparent rectangular substrate 15 having holes 14 and a through hole for evacuation are provided.
A mounting table N in which the through holes 14 are formed is prepared. This recess
12B is a concave having the same diameter and the same depth as the large liquid crystal display substrate 1.
Part 12_ThreeAnd the same diameter as the large transparent electrode substrate 8
The thickness of the large transparent electrode substrate 8 is
Recess 12 having a depth obtained by adding the thickness of_FourAnd were stacked
It has a two-stage structure. At this time, the sealing material pattern 6
Since the thickness is extremely thin, the recess 12 _FourThe depth of the large transparent
The thickness may be the thickness of the polar substrate 8. In FIG. 4, a putter for sealing material
The thickness of the pin 6 is shown enlarged. Large liquid crystal display substrate 1
Facing upward, the large transparent electrode substrate 8 faces the mounting table N side.
Then, the circular substrate assembly 11 is placed, and further, the rectangular substrate
15 concave portions 12B concave portions 12_FourOn the large LCD display substrate 1 side
The circular substrate is placed in the concave portion 12B of the rectangular substrate
The joined body 11 is stored. And from the through hole 14
Circular substrate bonding by vacuuming with no vacuum pump
The body 11 and the rectangular substrate 15 are fixed.

Thereafter, using a scriber (not shown), the notch groove lines S ₂ , S ₂ , S ₂ corresponding to the notch groove lines S ₁ , S ₁ , S ₁ with reference to the alignment marks 10 ₁ , 10 _{2. 2} is formed from one end of the rectangular substrate 15 to the other end. Thereafter, the evacuation is stopped, and the circular substrate assembly 11 is taken out from the concave portion 12B of the rectangular substrate 15.

Thus, without using the orientation flat O as a reference,
Alignment mark 7₁, 7_Two, 10 ₁, 10_TwoBased on
Further, the circular substrate joined body 11 is
After being stored in the recesses 12A and 12B, it is fixed and fixed to a rectangular base.
From one end of the plates 13 and 15 to the other end, the notch S
₁, S₁, S₁, S_Two, S_Two, S_TwoWith a certain stress
Formed on the large liquid crystal display substrate 1 and the large transparent electrode substrate 8
Notch groove S₁, S₁, S₁, S_Two, S_Two, S_TwoLack of
Prevention and bending of notched groove line caused by this chipping
Prevents ripping. Therefore, the shape of the liquid crystal injection port 5 must be uniform.
Can be fixed.

The rectangular substrate 13 and 15 are the transparent, since both sides of the large-sized liquid crystal display substrate 1 and large transparent electrode substrate 8 can see the alignment mark 10 _1, 10 _2, the alignment mark 10 _1, 10 _With reference to ₂ , the notch groove lines S ₂ , S ₂ , S ₂ can be accurately formed at positions corresponding to the notch groove lines S ₁ , S ₁ , S ₁ .

(Fourth Step) Next, a cleavage device (not shown)
Using these notched groove lines S₁, S₁, S ₁,
S_Two, S_Two, S_TwoCleave the circular substrate assembly 11 from FIG.
Liquid crystal cell bar 1 exposing liquid crystal injection ports 5, 5 shown in FIG.
6 is produced. Next, as shown in FIG.
The liquid crystal display element 21 is obtained.

As described above, according to the first embodiment of the present invention,
For example, the liquid crystal injection port 5 faces the same direction on the large liquid crystal pixel substrate 1.
The sealing material pattern 6 is formed as shown in FIG.
Mark 7₁, 7_TwoWhile forming a large transparent electrode substrate
This alignment mark 7₁, 7_TwoAlign with
Alignment mark 9₁, 9_TwoAnd the large liquid crystal display substrate 1
Of the large transparent electrode substrate 8 outside the size corresponding to the diameter.
Alignment mark 9 on part₁, 9_TwoAnd the predetermined positional relationship
Alignment mark 10₁, 10_TwoAnd formed
Thereafter, the large liquid crystal pixel substrate 1 and the large transparent electrode substrate 8 are
Circular substrate assembly bonded together with gaps
After fabricating 11, the rectangular substrates 13, 1 prepared in advance are prepared.
5 having the same depth as the thickness of the circular substrate assembly 11
This circular substrate assembly 11 is stored in 12A and 12B, and
Lightment mark 10₁, 10_TwoWith a rectangular base
Large liquid crystal display from one end of the plates 13 and 15 to the other
Notch grooves on the substrate 1 and the large transparent electrode substrate 8 respectively
In S₁, S₁, S₁, S_Two, S _Two, S_TwoTo form
Notch groove line S₁, S₁, S₁, S_Two, S_Two, S_TwoDisconnect from
To produce the liquid crystal cell bar 16,
S₁, S₁, S₁, S_Two, S_Two, S_TwoCut in the direction perpendicular to
To manufacture the liquid crystal display element 21, the notch groove line
S₁, S₁, S₁, S_Two, S_Two, S_TwoPrevents straight bends
Therefore, the shape of the liquid crystal injection port 5 can be made constant. This result
As a result, in the state of the liquid crystal cell bar 16, the liquid crystal layer
Injecting liquid crystal layer 19 stably when injecting 19
And the production yield is improved.

Further, since the alignment marks 9 ₁ and 9 ₂ and the alignment marks 10 ₁ and 10 ₂ can be produced at the same time, the number of steps is not increased, so that the productivity of the liquid crystal display element 21 is improved. Manufacturing costs can be reduced.

Next, a second embodiment of the present invention for improving the manufacturing yield of the liquid crystal display element 21 even when the large liquid crystal display substrate 1 and the large transparent electrode substrate 8 are warped will be described. The same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and description thereof will be omitted. The second embodiment of the present invention differs from the first embodiment of the present invention shown in FIGS. 1 to 5 in the following points, and is otherwise the same.

That is, as shown in FIG. 6 and FIG.
12 having the same shape and the same depth as the crystal display substrate 1_FiveHas
Rectangular substrate 17, the same shape as large transparent electrode substrate 8,
Recess 12 of the same depth₆Prepare rectangular substrate 18 with
I do. As shown in FIG. 6A and FIG.
The display substrate 1 is placed in the concave portion 12 of the rectangular substrate 17._FiveAnd store it in
Lightment mark 7₁, 7_TwoThis rectangular base is
Notch of predetermined pitch from one end of plate 17 to the other end
Groove line S_Two, S_Two, S _TwoFormed on large liquid crystal display substrate 1
And the concave portion 12 of the rectangular substrate 17_FiveLarge LCD display substrate
Take 1 out.

Thereafter, in the first embodiment of the present invention,
Figure 1 (A) and (B) in the same manner as described with reference to, and these kerf line S _2, S _2, S ₂ lacks in time, and notched along the groove lines S _2, S _2, S ₂ Then, the liquid crystal display portions 4 and 4 are formed in a line, and a sealing material pattern 6 surrounding the pixel electrode regions 2 and 2 of the liquid crystal display portions 4 and 4 and having a liquid crystal injection port 5 oriented in a certain direction is formed. On the other hand, as shown in FIGS. 7A and 7B, the large transparent electrode substrate 8
Was stored in the recessed portion 12 ₆ of the rectangular substrate 18, alignment marks 9 _1, 9 ₂ or 10 _1, 10 ₂ with reference to the cutout groove line S and the from one end to the other end of the rectangular substrate 18 After forming notch groove lines S ₁ , S ₁ , and S ₁ corresponding to ₂ , ₂ , S ₂ , and S ₂ on the large-sized transparent electrode substrate 8, the large-sized transparent electrode substrate 8 is placed in the concave portion 1 of the rectangular substrate 18.
Take out from ₂₆ .

Next, in the same manner as in the first embodiment of the present invention, the large-sized liquid crystal display substrate 1 and the large-sized transparent electrode substrate 8 are bonded together via the sealing material pattern 6, and these notched groove lines S _{1 are formed.} , S ₁ , S ₁ , S ₂ , S ₂ , and S _{2 are} cleaved to form a liquid crystal cell bar 16 shown in FIG. Thereafter, the same steps as in the first embodiment of the present invention are performed to obtain the liquid crystal display element 21 shown in FIG.

According to the second embodiment of the present invention, when bonding the large liquid crystal display substrate 1 and the large transparent electrode substrate 8,
Since kerf line S _{1-outs, S 1, S 1, S} 2, S 2, strain stress from S ₂ is opened, is mitigated warping of these substrates, the shape of the liquid crystal inlet 5 becomes constant, Since the liquid crystal layer 19 can be uniformly injected, the production yield of the liquid crystal display element 21 is improved.

In the second embodiment of the present invention, the notch groove lines S ₁ , S ₁ , S ₁ , S ₂ , S ₂ , S ₂ are formed in the large liquid crystal display substrate 1 and the large transparent electrode substrate 8 in one direction. However, a similar effect can be obtained by forming it vertically and horizontally.

Next, a modification of the first embodiment of the present invention will be described. FIG. 6 shows a modification of the first embodiment of the present invention.
(A) and for housing alignment mark 7 formed in advance an outer peripheral portion as shown in (B) _1, 7 a large liquid crystal display substrate 1 having a ₂ in the recess 12 in ₅ of the rectangular substrate 17. With reference to the alignment marks 7 ₁ and 7 ₂ , the rectangular substrate 1
Groove line S ₂ notch in one direction with a predetermined pitch from 7 one end of toward the other end, after the formation of the S _2, S _2, taken from the recess 12 ₅ rectangular substrate 17.

Next, in the same manner as (first step) in the first embodiment of the present invention shown in FIG. 1, the notch grooves S ₂ , S ₂ , S ₂ Along the lines S ₂ , S ₂ , S ₂ , the liquid crystal display units 4, 4
And a sealing material pattern 6 surrounding the pixel electrode regions 2 and 2 of the liquid crystal display portions 4 and 4 and having a liquid crystal injection port 5 oriented in a certain direction.

Thereafter, the diameter is larger than the diameter of the large liquid crystal display substrate 1.
A large disk-shaped transparent electrode substrate 8 was prepared and shown in FIG.
In the same manner as (second step) in the first embodiment of the present invention,
Then, an alignment mark 9 is formed on the large transparent electrode substrate 8.₁,
9_TwoAnd alignment mark 9 ₁, 9_TwoAnd predetermined positional relationship
Alignment mark 10 having₁, 10_TwoTo form
Then, the large liquid crystal display substrate 1 and the large transparent electrode substrate 8 are
The bonded circular substrate assembly 11 is manufactured. In addition,
As shown in FIG. 3, (3rd Embodiment) in the first embodiment of the present invention
In the same manner as in step), a circular plate having the same depth as the circular
12A, and has a through hole 14 at the bottom.
A rectangular substrate 13 is prepared, and the large transparent electrode substrate 8 is
The large liquid crystal display substrate 1 with the concave portion 12 of the rectangular substrate 13.
A, the circular substrate bonded body 1 is
1 is stored. Then, a vacuum (not shown) is applied
The rectangular substrate 13 is recessed by evacuating with a pump.
It is fixed in the portion 12A.

Next, with reference to the alignment marks 10 ₁ and 10 ₂ , a notch groove line S is formed from one end of the rectangular substrate 13 to the other end in a direction in which the liquid crystal injection ports 5 and 5 are exposed.
₁ , S ₁ and S ₁ are formed. Thereafter, the circular substrate joined body 11
From the recess 12A of the rectangular substrate 13. Furthermore,
By performing the same step as the (fourth step) in the first embodiment of the present invention, the liquid crystal display element 21 shown in FIG. 8 is obtained. In the case of this modified example, the same effect as that of the first embodiment of the present invention can be obtained.

[0037]

According to the method of manufacturing a liquid crystal display device of the present invention, a liquid crystal display portion having a pixel electrode region is formed at a predetermined pitch on a large liquid crystal display substrate having a first alignment mark formed on an outer peripheral portion in advance. To form a matrix,
A step of forming a sealing material pattern surrounding the pixel electrode region of each liquid crystal display portion and having a liquid crystal injection port so that the liquid crystal injection port is aligned in a column direction or a row direction, and for aligning with the first alignment mark. The second alignment mark and the large-sized liquid crystal display substrate, on the large-sized transparent electrode substrate on which a third alignment mark having a predetermined relationship with the second alignment mark and having a predetermined relationship with the second alignment mark is formed. A step of aligning the large-sized liquid crystal display substrate with the first alignment mark and the second alignment mark and bonding the large-sized liquid crystal display substrate via the plurality of sealing material patterns to form a substrate assembly; A first concave portion having the same shape and the same depth as the thickness, and having the same shape and the same thickness as the thickness of the large-sized transparent electrode substrate on the first concave portion; The have a concave portion of a second recess 1
A rectangular substrate is prepared, the large-sized liquid crystal display substrate is opposed to the first rectangular substrate, and the large transparent electrode substrate is directed upward, and the substrate assembly is placed in a recess of the first rectangular substrate. The large transparent electrode substrate is stored from one end of the first rectangular substrate to the other end along each liquid crystal injection port in a column direction or a row direction in each liquid crystal display unit with respect to the third alignment mark. Forming a first notch groove line thereon, and removing the substrate assembly from the concave portion of the first rectangular substrate, and then forming a third concave portion having the same shape and the same depth as the thickness of the large-sized transparent electrode substrate. And the same shape as the thickness of the large-sized liquid crystal display substrate formed on the third recess,
Prepare a second rectangular substrate composed of a fourth recess having the same thickness,
The large transparent electrode substrate on which the first cutout groove lines are formed is opposed to the second rectangular substrate side, and the large liquid crystal display substrate side is directed upward, and the substrate joined body is formed into the second rectangular shape. The large liquid crystal display substrate is housed in a concave portion of the substrate and is positioned from one end of the second rectangular substrate toward the other end at a position corresponding to the first notch groove line with reference to the third alignment mark. Forming a second notch groove line, and after taking out the substrate joined body from the concave portion of the second rectangular substrate, cutting it from the first and second notch groove lines to produce a liquid crystal cell bar. Therefore, the shape of the liquid crystal injection port becomes constant, and the liquid crystal layer can be stably injected, so that the production yield of the liquid crystal display element is improved and the productivity is improved. Further, before forming a liquid crystal display portion and a sealing material pattern having a liquid crystal injection port at a peripheral portion of the liquid crystal display portion, the large liquid crystal display substrate and the large transparent electrode substrate are accommodated in a rectangular substrate, and the rectangular substrate is formed. Since a notch scratch line is formed from one side of the liquid crystal cell bar to produce a liquid crystal cell bar, a liquid crystal display element having a good production yield can be obtained even when a large liquid crystal display substrate and a large transparent electrode substrate are warped.

[Brief description of the drawings]

FIG. 1 is a process chart showing a first process of a first embodiment of the present invention.

FIG. 2 is a process chart showing a second process of the first embodiment of the present invention.

FIG. 3 is a process diagram showing a state in which a notch groove line is formed in a large-sized transparent electrode substrate in a third step of the first embodiment of the present invention.

FIG. 4 is a process diagram showing a state in which a notch groove line is formed in a large-sized liquid crystal display substrate in a third step of the first embodiment of the present invention.

FIG. 5 is a process chart showing a fourth process of the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a rectangular substrate accommodating a large-sized liquid crystal display substrate according to a second embodiment of the present invention.

FIG. 7 is a view showing a rectangular substrate accommodating a large transparent electrode substrate according to a second embodiment of the present invention.

FIG. 8 is a sectional view showing a general liquid crystal display element.

FIG. 9 is a view showing a first step of a conventional method for manufacturing a liquid crystal display element.

FIG. 10 is a view showing a second step of the conventional method for manufacturing a liquid crystal display element.

FIG. 11 is a view showing a third step of the conventional method for manufacturing a liquid crystal display element.

FIG. 12 illustrates a method for manufacturing a liquid crystal cell.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Large liquid crystal display board, 2 ... Pixel electrode area, 3 ... Relay terminal, 4 ... Liquid crystal display part, 5 ... Liquid crystal injection port, 6 ... Seal material pattern, 7 ₁ and 7 ₂ ... Alignment mark (first alignment mark) , 8 ... large transparent electrode substrate, 9 ₁ , 9 ₂ ... alignment mark (second alignment mark), 10 ₁ ,
10 ₂ … alignment mark (third alignment mark), 11… circular substrate joined body (substrate joined body), 12A,
12B, 12 ₄ , 12 ₅ ... recess, 12 ₁ ... recess (first recess), 12 ₂ ... recess (second recess), 12 ₃ ... recess (third recess), 12 ₄ ... recess (fourth recess), 13, 17: rectangular substrate (first rectangular substrate), 15, 18: rectangular substrate (second rectangular substrate), 16: liquid crystal cell bar, 19: liquid crystal layer,
S ₁ , S ₂ ... Notch groove line

Claims (3)

[Claims] 1. A liquid crystal display having pixel electrode regions is formed in a matrix at a predetermined pitch on a large liquid crystal display substrate having first alignment marks formed on an outer peripheral portion thereof. Forming a sealing material pattern surrounding the pixel electrode region of the portion and having a liquid crystal injection port so that the liquid crystal injection port is aligned in a column direction or a row direction; and a second alignment mark for aligning with the first alignment mark. And the large liquid crystal display substrate on a large transparent electrode substrate which is located outside a size corresponding to the shape of the large liquid crystal display substrate and on which a third alignment mark having a predetermined relationship with the second alignment mark is formed. And bonding the first alignment mark and the second alignment mark through the plurality of sealing material patterns. A step of fabricating a combined substrate; and a first recess having the same shape and the same depth as the large liquid crystal display substrate and the same shape and the same thickness as the thickness of the large transparent electrode substrate on the first recess. A first rectangular substrate having a concave portion composed of a second concave portion is prepared, the large-sized liquid crystal display substrate is opposed to the first rectangular substrate side, and the large transparent electrode substrate side is directed upward. The joined body is housed in the concave portion of the first rectangular substrate, and the first rectangular substrate is arranged along the liquid crystal injection port in the column direction or the row direction in each liquid crystal display portion with reference to the third alignment mark. Forming a first cutout groove line on the large-sized transparent electrode substrate from one end to the other end; and after taking out the substrate assembly from the concave portion of the first rectangular substrate, Same shape and depth as thickness A second rectangular substrate having three concave portions and a fourth concave portion having the same shape and the same thickness as the large liquid crystal display substrate formed on the third concave portion is prepared, and the first cutout groove line is formed. The formed large-sized transparent electrode substrate faces the second rectangular substrate side, the large liquid crystal display substrate side is directed upward, and the substrate assembly is housed in a concave portion of the second rectangular substrate, Based on the third alignment mark,
At a position corresponding to the first notch groove line, the second
Forming a second notch groove line on the large-sized liquid crystal display substrate from one end to the other end of the rectangular substrate; and after taking out the substrate joined body from a concave portion of the second rectangular substrate, A step of manufacturing a liquid crystal cell bar by cutting from the first and second notch groove lines; and injecting a liquid crystal layer into a liquid crystal injection port opened from the liquid crystal cell bar, sealing the liquid crystal layer, and further sealing the first and second liquid crystal cells. Cutting in a direction orthogonal to the notch groove line. 2. A first liquid crystal display having the same shape and the same depth as a large-sized liquid crystal display substrate on which a first alignment mark is formed in advance on an outer peripheral portion.
A first rectangular substrate having a concave portion is prepared, the large-sized liquid crystal display substrate is housed in a first concave portion of the first rectangular substrate, and from one end of the first rectangular substrate with respect to the first alignment mark. Forming a first notch groove line having a predetermined pitch toward the other end on the large-sized liquid crystal display substrate, and then taking out the first notch groove line from the first concave portion of the first rectangular substrate; A liquid crystal display portion having a pixel electrode region in a line at a predetermined pitch between lines is formed, and a sealing material pattern surrounding the pixel electrode region and having a liquid crystal inlet is arranged such that the liquid crystal inlets are aligned in a column direction or a row direction. Forming a second alignment mark for aligning with the first alignment mark and a portion outside the size corresponding to the shape of the large-sized liquid crystal display substrate; A second rectangular substrate having a second concave portion having the same shape and the same depth as the large transparent electrode substrate on which the third alignment mark having a predetermined relationship with the alignment mark is formed is prepared. The second notch is housed in the recess of the second rectangular substrate, and is positioned at a position corresponding to the first notch groove line from one end to the other end of the second rectangular substrate with reference to the third alignment mark. Forming a groove line on the large-sized transparent electrode substrate, and then taking out the groove line from the second concave portion of the second rectangular substrate; aligning the first alignment mark and the second alignment mark to form the large-sized liquid crystal display substrate; A step of bonding the large-sized transparent electrode substrate thereon through the sealing material pattern to form a substrate assembly; and a step of cleaving from the first and second notch groove lines to form a liquid. A step of manufacturing a cell bar, and a step of injecting a liquid crystal layer into a liquid crystal injection port opened from the liquid crystal cell bar, sealing the liquid crystal layer, and further cutting the liquid crystal layer in a direction orthogonal to the first and second cutout groove lines. A method for manufacturing a liquid crystal display element. 3. A first liquid crystal display having the same shape and the same depth as a large-sized liquid crystal display substrate having a first alignment mark formed on an outer peripheral portion thereof in advance.
A first rectangular substrate having a concave portion is prepared, the large-sized liquid crystal display substrate is housed in the first concave portion, and a predetermined amount is set from one end of the first rectangular substrate toward the other end with reference to the first alignment mark. Forming a first notch groove line with a pitch on the large-sized liquid crystal display substrate, and then taking out the first notch groove line from the first concave portion of the first rectangular substrate; Forming a liquid crystal display portion having a pixel electrode region in one row, and forming a sealing material pattern surrounding each pixel electrode region and having a liquid crystal injection port such that the liquid crystal injection port is aligned in a column direction or a row direction, A second alignment mark for aligning with the first alignment mark and an outer portion of a size corresponding to the shape of the large-sized liquid crystal display substrate, wherein the second alignment mark The large-sized liquid crystal display substrate is positioned on the large-sized transparent electrode substrate on which the third alignment mark having a predetermined relationship is formed, by positioning the first alignment mark and the second alignment mark via the sealing material pattern. Forming a substrate joined body by bonding together, a second concave portion having the same shape and depth as the large liquid crystal display substrate, and a thickness of the large transparent electrode substrate formed on the second concave portion. A second rectangular substrate having a third concave portion having the same shape and the same thickness is prepared, the large liquid crystal display substrate of the substrate assembly is opposed to the second rectangular substrate, and the large transparent electrode substrate is The substrate joined body is accommodated in the concave portion of the second rectangular substrate facing upward, and the first cutout is formed along each liquid crystal injection port in each liquid crystal display portion with reference to the third alignment mark. Forming a second notch groove line on the large transparent electrode substrate from one end of the second rectangular substrate toward the other end at a position corresponding to the groove line; After taking out the substrate joined body, cutting the first and second notched groove lines to produce a liquid crystal cell bar; and injecting a liquid crystal layer into a liquid crystal injection port opened from the liquid crystal cell bar, and then sealing the liquid crystal layer. And a step of cutting in a direction orthogonal to the first and second notch groove lines.