JP3141318B2 - Electrode structure of liquid crystal element and liquid crystal element having the structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure of, for example, a liquid crystal device driven by a simple matrix having a stripe-shaped electrode group.

[0002]

2. Description of the Related Art A pair of electrode substrates having a stripe-shaped electrode group are arranged facing each other so that the electrode groups are orthogonal to each other.
In a liquid crystal element in which liquid crystal is sandwiched in the gap, if the short-circuit of the electrode of the liquid crystal element and the resistance value of the electrode are out of the standard, it is almost impossible to repair the electrode. After the electrode group is formed, terminals for inspection are placed on the lead portions of all the electrodes, and short circuits and wiring resistances are inspected, and defective products are removed from the line.

[0003]

As the display image becomes finer and the number of pixels per area increases, the electrode width per line also becomes narrower. It has become difficult to get on the drawer part, and it has become difficult to mount the terminal accurately.

Further, in order to suppress the wiring resistance of the electrode, a metal wiring is laminated as an auxiliary electrode on the transparent electrode within a range where display is not hindered, and the metal wiring has a tip portion corresponding to the electrode width. There is also a problem that the thinned terminal causes damage such as disconnection or a short-circuit due to a metal piece scraped off by the terminal.

It is an object of the present invention to provide an electrode structure capable of easily and reliably performing the above-mentioned short circuit and wiring resistance test of the liquid crystal element without damaging the electrode, and a liquid crystal element having the electrode structure. .

[0006]

A feature of the electrode structure of the present invention is that in the above-described simple matrix drive type liquid crystal element, each electrode is a two-layer structure in which a metal wiring is partially laminated on a transparent electrode. a configuration, the lead portion outside the display area, have a test pad part to expose the transparent electrode,
In the electrode group with the smaller electrode width, the inspection
The door part is arranged to be shifted in the longitudinal direction every other, and
The electrode width is formed wide at the inspection pad portion,
Each electrode is adjacent to the test pad of the adjacent electrode.
That is, the transparent electrode in the narrow electrode width is exposed . In the present invention, in the electrode group having the wider electrode width,
In addition, a configuration in which metal wirings are stacked on both sides of the inspection pad portion of each electrode in the electrode width direction is appropriately used. Further, by providing a dummy wiring having the same configuration as each of the information electrode and the common electrode outside the display area, the wiring resistance can be measured without affecting the information electrode and the common electrode.

The present invention also provides a liquid crystal device having the above-mentioned electrode structure.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to one embodiment of the present invention.

FIG. 1 is a schematic plan view showing an example of the liquid crystal device of the present invention, FIG. 2 is a sectional view taken along the line AA ′, and FIG.
It is B 'sectional drawing. In the figure, a region surrounded by a dotted line is one pixel, 1a and 1b are insulating substrates, 2 is an undercoat layer, 3 is a color filter constituting a predetermined pattern, 4
Is a flattening layer, 5 is a barrier layer, 6a and 6b are transparent electrodes, 7
a and 7b are auxiliary electrodes, 8a and 8b are short-circuit prevention layers, 9
a and 9b are rough surface forming layers, 10a and 10b are orientation layers, 11
Is an adhesive bead, 12 is a spacer bead, 13 is a liquid crystal layer,
Reference numeral 14 denotes a light-shielding layer. In FIGS. 2 and 3, the upper side with the liquid crystal therebetween is referred to as a first substrate, and the lower side is referred to as a second substrate. FIG. 1 is a plan view seen from the first substrate side.

The observer side of the material may be set on either the first substrate or the second substrate, but is preferably on the first substrate side having a color filter film.

Hereinafter, each part of the liquid crystal device shown in FIGS. 1 to 3 will be described in detail along the manufacturing process with reference to the drawings.

First, the first substrate will be described.

Step-a (FIG. 14 (a)) As the insulating substrate 1a, a substrate having excellent transparency, which is generally commercially available as a glass for liquid crystal, can be used, and examples thereof include blue plate glass and non-alkali glass. Can be Preferably, one having one surface polished is used. The thickness and size are appropriately selected depending on the screen size and the number of panels to be taken from one.
In the case of manufacturing a 4.8 inch liquid crystal element, 1.1
The thickness is about mm.

Step-b (FIG. 14 (a)) In the present invention, preferably, an undercoat layer 2 is provided on the surface of the insulating substrate 1a to prevent elution of alkali from glass. The undercoat layer 2 only needs to have a protective effect of the lower layer, for example, SiO ₂ , MgO, Si
N, TiO ₂ , Al ₂ O ₃ , ZrO and the like are used, and 200
Used with a thickness of ~ 1000mm.

Step-c The insulating substrate 1a having the undercoat layer 2 formed on its surface is cleaned by a suitable number of times and combination using at least one of a pure water shower, pure water + ultrasonic cleaning, and a brush.
After drying, organic matter is removed by irradiation with ultraviolet rays.

Step-d (FIG. 14 (a)) The light-shielding layer 14 shown in FIG. 3 has a stripe pattern (black stripe) as shown in FIG. Shapes can be used as appropriate. The material of the light-shielding layer 14 is excellent in light-shielding properties such as metals such as Cr and Mo, or alloys thereof, oxides such as Cr ₂ O ₃ , and organic materials such as a resin in which a black pigment is dispersed. Materials can be used. Thickness 500
It is set in the range of up to 1500 ° depending on the light shielding ability of the material.
For example, when metal is used, a light-shielding effect can be obtained even if the thickness is small. In the present invention, a Mo—Ta alloy layer is preferably used, and preferably used at 1000 ° or less.
The light-shielding layer 14 is obtained by laminating the material over the entire surface of the substrate by sputtering, coating, or the like, and then patterning. Specifically, a resist selected on the basis of the adhesiveness to the material is applied to the surface of the light-shielding layer by spinner, printing, or the like, and the resist is coated with a resist of 70 to 12
Prebaked at 0 ° C, exposed at 90 to 120 mJ, developed,
After washing and drying, the substrate is etched with an etching solution such as an acid corresponding to the material of the light-shielding layer, washed, and the resist is peeled off and further washed.

The light-shielding layer 14 is formed up to the vicinity of a sealant, which will be described later, while leaving a small non-light-shielding portion, and this portion can be used for inspection of the liquid crystal alignment state.

Step-e (FIG. 14 (b)) In the present invention, the color filter 3 preferably forms white (W) in addition to green (G), red (R) and blue (B). As a forming method, there are a dyeing method, a pigment dispersion method, an electrodeposition method, and the like, and any of the methods can be used in the present invention. The pigment dispersion method will be described as an example. A color resist of a photosensitive resin in which a desired pigment (no pigment is added to W) is dispersed is applied to a thickness of, for example, 1.0 to 2.0 μm using a spinner, a coater, or the like, and is leveled at a constant temperature. Pre-bake at around 80 ° C. At this time, the temperature, the holding time, and the thickness to be applied are appropriately selected depending on the resist material. Then 20
Exposure is performed at 0 to 1000 mJ. The exposure degree is R, G, B,
Since sensitivity differs depending on W, adjustment is made by changing the exposure time. After exposure, development is performed with a developing solution, method and temperature according to the resist material, post-baked at 120 to 250 ° C., and washed. For example, as shown in FIG. 4, each color filter is formed with a gap of several μm so as not to come into contact with the previously formed pattern of the light shielding layer 14 and the adjacent color filters. Further, in addition to a region which is a display region as a whole, a region which is a non-display region surrounding the display region is formed so as not to be exposed to a sealant in the vicinity of a substrate edge described later. Here, the pattern shapes (sizes of the color filters) of the color filters inside and outside the display area may be different from each other. For example, one unit can be made larger than inside the display area outside the display area. The above forming step is performed sequentially for each color of each color filter, and the order is appropriately selected depending on the material used.

Step-f (FIG. 14C) Next, a flattening layer 4 for filling the gap between the color filters and flattening the surface is formed. In the present invention, the flattening layer 4 is coated with a flattening material by a spinner, printing, a coater or the like so that the maximum thickness (t in FIG. 2) becomes 1.5 to 5 μm. It is formed by leveling and, if necessary, post-baking at 150-330 ° C. (these temperatures are set by the planarizing material). As the flattening material, any inorganic or organic material can be used as long as it can flatten a step caused by the color filter 3 and the light-shielding layer 14 and can withstand post-processes and has heat resistance and chemical resistance. Specific examples include polyamide, epoxy resin, and organic silane-based resin. Among them, organic silane-based resin is preferably used.

In the liquid crystal device of the present invention, the liquid crystal layer 13
By making the thickness (T) smaller than the maximum thickness (t) of the flattening layer, the rate of generation of voids generated when liquid crystal is injected is reduced, and the yield during manufacturing is improved. Further, in the liquid crystal element of the present invention, it is desirable that the diameter of the spacer beads 12 described later is larger than the thickness (T) of the liquid crystal layer 13 and the spacer beads 12 are fixed so as to be embedded in both substrates. Therefore, it is desirable that the substrate be as flexible as about 7H or less in pencil hardness so that the spacer beads are buried.
More preferably, it is in the range of H to 7H. The pencil hardness is a value obtained by measuring according to a method using a pencil hardness measuring device in JIS-K5401. Further, the flattening layer 4 is preferably formed up to the lower side of a sealant described later. With this configuration, liquid crystal can be easily injected, and defective products due to defective injection of liquid crystal during manufacturing can be prevented.

Step-g (FIG. 14C) A barrier layer 5 is formed on the surface of the flattening layer 4, and the color filter 3 is protected in the subsequent upper layer forming step and etching step. The material of the barrier layer 5 is not limited as long as it has a protective effect.
O ₂ , MgO, SiN, TiO ₂ , Al ₂ O ₃ , ZrO and the like are preferably used. The thickness of the barrier layer 5 is, for example, 100
It is formed by a method according to the material such as printing, sputtering, or the like at about 1000 °.

The above is the process for the first substrate only, and the following processes are common to the first and second substrates. Also, the second
The same material as that of the first insulating substrate 1a is generally used for the insulating substrate 1b of the substrate.

Step-h (FIG. 14 (c) and FIG. 15)
(A)) As the transparent electrodes 6a and 6b, for example, a layer made of a transparent conductive material such as ITO is formed by sputtering, vapor deposition, firing, or the like.
Preferably, SnO ₂ having a content of 5 to 10% with respect to In ₂ O ₃ is used, but may be appropriately selected depending on transmittance and conductivity. The thickness of the transparent electrodes 6a and 6b is, for example, 300 to 30.
At 00 °, the thickness is also selected according to the optical characteristics and resistance of the liquid crystal used. The ITO layer is patterned by photolithography in the same manner as the light-shielding layer 14, and has a desired shape, in particular, a pattern corresponding to a pixel on the first substrate, and a pattern corresponding to the color filter of the opposing substrate on the second substrate (for example, the first substrate). The substrate is formed in a stripe shape corresponding to the space between the light shielding layers 14 shown in FIG. 4, and the second substrate is formed in the shape shown in FIG.
4 (c), FIG. 15 (a)). However, an aqueous solution of iron chloride, hydroiodic acid, hypophosphorous acid or the like is used as an etching solution. It is preferable that the transparent electrode 6a on the first substrate side be patterned corresponding to the color filter 3 formed outside the display area.

In the present invention, in this step, the resistance can be measured without affecting the drive electrode by forming the wiring outside the display area. FIG.
1 (a) shows the wiring 41 provided on the second substrate, and the wiring is similarly provided on the first substrate.

A substantially L-shaped weir 4 shown in FIG.
No. 2 has an effect of blocking a layer to be formed by application in a later step, and can prevent an unnecessary flow of a solution. Further, a weir (pattern) 43 shown in FIG. 11B is formed in parallel with a liquid crystal injection port described later, preferably on the second substrate side, so that the liquid crystal can be easily and uniformly injected as described later. Has the effect of These dams 42 and 43 do not need to be formed of ITO as long as they have the above-mentioned action, but can be formed simultaneously with the formation of the transparent electrode, which is advantageous in the manufacturing process.

Step-i (FIGS. 14D and 15B) Auxiliary electrodes 7a and 7b for reducing the wiring resistance of the transparent electrodes 6a and 6b are formed. The material is metal, Cr, Al, M
o, an alloy thereof, Mo-Ta, or the like is used. Further, a multilayer structure may be adopted in consideration of the adhesion to the transparent electrodes 6a and 6b, the resistance, and the adhesion to the resist. Specifically, it is Mo / Al or Mo / Al / Mo-Ta. In particular, in the case of a multi-layer configuration, since the etching speed differs depending on the material, the material is selected in consideration of the etching in the subsequent process. For example, when simultaneously etching the three-layer structure, Mo-Ta is 5 to 10% (for example, 200 to 500%).
Å) / Al alloy (for example, 200 to 1500Å) / Mo-
A laminated structure with Ta of 10 to 20% (for example, 100 to 500 °) has good compatibility with the etching solution. Further, the multilayer structure may be formed by laminating while etching each layer.

The above metal is laminated on the entire surface of the substrate, and the steps of resist application, exposure, development, post baking, etching and resist peeling are sequentially performed. For example, in the case of the first substrate, the metal overlaps the transparent electrode 6a, And color filter 3
Auxiliary electrode 7a having an opening thereon (FIG. 5), and auxiliary electrode 7b overlapping the end of transparent electrode 6b in the second substrate
(FIG. 7) is formed. The auxiliary electrode 7b may be formed over the entire surface of the transparent electrode 6b outside the display area.

A feature of the present invention resides in that pad portions for short-circuit inspection are provided at both ends of each drive electrode in the lead-out portion outside the display area. FIG. 9 shows pad portions of the second substrate,
FIG. 10 illustrates a pad portion of the first substrate. In the figure, 31 is a drive electrode of the second substrate, 32 is a drive electrode of the first substrate, 33
Is a pad portion. Although not shown in FIG. 9, a pad portion is also formed at the other end of the drive electrode 32, and the same configuration as in FIG. 9 is adopted. The pad portion 33 originally has the auxiliary electrodes 7a and 7
In the region where b is formed, the auxiliary electrode is not formed and the lower transparent electrodes 6a and 6b are exposed. As described above, since each of the drive electrodes 31 and 32 is very fine, the inspection terminal for short-circuit inspection is also a thin terminal needle corresponding to this, and when the drive electrodes 31 and 32 come into contact with the drive electrodes 31 and 32, the electrodes may be damaged. Further, there is a possibility that the inspection terminal may not be mounted on the particularly fine drive electrode 31. As shown in FIGS. 9 and 10, the pad portion 3 exposing a transparent electrode such as ITO harder than metal.
3, the drive electrodes 31 by the inspection terminals,
32 is prevented. Further, as shown in FIG. 9, especially in the fine drive electrode 31, the pad portions 33 are provided alternately and the width of the pad portion 33 is increased, so that the inspection terminals can be easily mounted. Here, it is more preferable to expose the underlying transparent electrode such as ITO even in the narrow portion of the drive electrode adjacent to the pad portion 33 as shown in FIG. In this case, even if the inspection terminal is displaced, it is possible to prevent the adjacent driving electrode (auxiliary electrode) from being hooked or damaged. Also, as shown in FIG.
In 2, the auxiliary electrode 6a is formed on both sides to suppress an increase in wiring resistance. In the present invention, either configuration of the drive electrodes 31 and 32 can be selected according to the electrode width.

After the formation of the auxiliary electrodes 7a and 7b, the wiring resistance and the short-circuit test are performed using the wiring 41 and the pad portion 33.

Step-k (FIG. 14E and FIG. 15)
(C)) The short prevention layers 8a and 8b are formed on the wiring. The short-circuit preventing layers 8a and 8b are insulating layers for preventing a short circuit between the upper and lower substrates, and an organic or inorganic insulating film is formed on the entire surface of the substrate by sputtering, coating, baking, or the like. Specifically, Ti—Si, SiO ₂ , TiO ₂ , and Ta ₂ O ₅ are used, and these can be used in a single layer or a multilayer.
For example, a multilayer structure in which Ta ₂ O ₅ is formed by sputtering at 500 to 1200 °, a solution of a coating type insulating film material such as Ti-Si is printed and baked to form a 500 to 1000 ° insulating layer is preferably used. . The short prevention layer 8a,
8b is formed up to the outside of a sealing region described later.

Step-1 (FIG. 14E and FIG. 15)
(C) In order to prevent the movement of the liquid crystal molecules during driving of the device, rough surface forming layers 9a and 9b are formed, and the surface of the alignment film described later is roughened. The rough surface forming layers 9a and 9b are made of 300 to 700 ° Si
O ₂ beads are obtained by dispersing 5 to 30% by weight in an insulating film solution having a ratio of Ti—Si = 1: 1, and printing and firing using a color developing plate. The film thickness is preferably 100 to 300 °, and is formed to the outside of the sealing region.

Step-m (FIG. 14E and FIG. 15)
(C) Alignment films 10a and 10b for controlling alignment of liquid crystal molecules
To form The material of the alignment film is selected from polyvinyl alcohol, polyimide, polyamide imide, etc., applied or printed on the entire surface of the substrate, baked at 200 to 300 ° C., and has a thickness of 50 to 100 ° and an insulating layer only inside the sealing region. To form Such an insulating layer is formed on the entire surface of the sealing region and, if necessary, for example, on a region corresponding to the display region.
A roller around which a brushed rubbing cloth is wound is pressed against the surface of the insulating layer (alignment film), and the rotation speed is 500 to 2000 r.
While rotating at pm, the surface of the insulating layer (orientation film) is subjected to a rubbing treatment to form orientation films 10a and 10b. The material of the rubbing cloth is selected from natural fibers such as cotton, and synthetic fibers such as aramid, nylon, rayon, Teflon, polypropylene, and acrylic. Among them, aramid fibers are preferably used. At the time of the rubbing treatment, a mask may be provided on, for example, the frame (outer periphery) of the insulating layer, and the surface of the insulating layer may be subjected to the rubbing treatment except for the frame. The rotation direction and the feed speed of the roller are appropriately selected depending on the degree of the rubbing treatment. After the rubbing treatment, both substrates are washed.

Step-n (FIG. 13) One substrate, preferably the first substrate surface (the surface of the alignment film)
Is sprinkled with the adhesive beads 11. The adhesive beads 11 have no tackiness at normal temperature and under the driving conditions of the element, and exhibit tackiness in various processes such as heat treatment at the time of laminating the substrates described later. The adhesive beads 11 are formed of an adhesive made of a thermosetting resin that does not affect the liquid crystal, such as an epoxy resin or an acrylic resin. The diameter of the adhesive beads 11 is preferably 2 to 10 μm, and the adhesive beads 11 are dispersed in a solvent such as isopropyl alcohol and dispersed at about 50 to 130 beads / mm ² . Further, the adhesive beads 11 are adhered to both substrates after sealing the substrates. As will be described later, the cutting positions of the first substrate and the second substrate are shifted to expose the terminals at the ends of the substrate. If the adhesive bead 11 is present, the part to be separated will adhere to the other substrate via the adhesive bead 11, so it is preferable that the adhesive bead 11 is not in a region to be separated by cutting, It is preferable to spray only the corresponding area.

Step-o (FIG. 8) A seal pattern shown in FIG. 8 is drawn on the other substrate, preferably the surface of the second substrate (for example, the surface of the alignment film) by using a sealant except for the injection port. In the figure, 21 is a sealant, 22 is a liquid crystal inlet, and 23 is a dummy wall described later. As the sealing agent 21, for example, a thermosetting resin material such as a thermosetting epoxy resin is used, and drawing is performed by a dispenser. The drawing method is not limited to this, and is appropriately selected according to the material of the sealant, such as screen printing. The width may be set in consideration of the cell thickness or the thickness at the time of printing. Note that the dummy wall 23 is not limited to being provided in the vicinity as shown in FIG. 8, and the formation location can be appropriately changed according to the conditions such as the liquid crystal material to be used. You may. In FIG. 8, when a color filter is formed in a non-display area outside the display area, the dummy wall 23 can be provided at a position corresponding to the filter or a position outside the filter formation area. At this time, it is preferable to form a dummy wall outside the filter formation region from the viewpoint of a cell gap.

Step-p (FIG. 13 (a)) Spacer beads 12 are sprayed on a substrate different from the substrate on which the adhesive beads are sprayed, preferably on the surface of the substrate on which the sealant is drawn. The diameter of the spacer beads 12 is selected to be larger than the cell thickness, but is preferably in the range of 0.6 to 3.5 μm. For example, when the cell thickness is 1 μm,
A bead having a diameter of about 1.2 to 1.3 μm is selected. As the material of the beads, silica beads and alumina beads are preferably used.
It is sprayed on the entire surface of the substrate so as to have a density of about 700 / mm ² .
As for such a solvent, it is preferable to select and use a spacer beads having a low melting property. In the present invention, since beads having a diameter larger than the thickness of the liquid crystal layer are finally used as spacers, the beads are fixed between the substrates in a state in which the beads are embedded in the middle of the substrate surface. Are prevented from moving, and a uniform liquid crystal layer thickness is maintained.

Step-q As shown in FIG. 13, the substrate on which the adhesive beads 11 are scattered is fixed, and the substrate on which the spacer beads 12 are scattered is overlapped so that the alignment films 10a and 10b are inside. Heating is performed for 10 to 120 minutes while applying pressure, whereby the bonding beads 11 and the sealing agent 21 are cured, and the two substrates are bonded. That is, the adhesive beads 11 and the spacer beads 12 are scattered on another substrate, and the substrate on which the adhesive beads 11 are scattered is fixed and bonded, so that there is no fear that the adhesive beads 11 are biased or detached from the substrate surface. . Further, since the spacer beads 12 are much smaller in diameter than the adhesive beads 11 and adhere to the substrate surface even when the substrate is turned over, the spacer beads 1
2 is not biased or falls off the substrate. According to this step, the substrates are bonded together in a state where both the adhesive beads 11 and the spacer beads 12 are uniformly dispersed.

Step-r Scribing is performed by shifting the cutting position between the first substrate and the second substrate so that the mounting terminal portion is exposed, and an extra substrate is removed. Also, for example, a bar code label or the like may be attached near the position corresponding to the injection port on both substrates immediately before scribing to identify the substrates.

Step-s A chiral smectic liquid crystal is injected into the liquid crystal cell obtained in the above step. First, put the liquid crystal cell in the vacuum device,
When the inside of the cell is sufficiently evacuated, liquid crystal is attached to the inlet. Next, pressure is gradually applied in this state, and the liquid crystal is drawn into the liquid crystal cell at a constant speed as much as possible.

In the present liquid crystal element, the thickness (T) of the liquid crystal layer 13
Since the thickness (t) of the flattening layer 4 is larger than that, the void generation rate of the liquid crystal layer is low, and the yield in the liquid crystal injection step is improved. Further, in the present device, since the flattening layer 4 is formed up to the lower side of the sealing agent 21 as described above, the injection of the liquid crystal is facilitated, and the production yield is further improved. Further, as shown in FIG. 11 (b), a weir 43 is formed of ITO in the liquid crystal cell, and the liquid crystal moves outward along the weir 43 as shown by an arrow in FIG. 12 (a). Spreading and generation of bubbles are prevented. FIG. 12B shows the flow of liquid crystal in a conventional liquid crystal cell. Further, even if bubbles are generated, the bubbles are pushed between the dummy wall 23 drawn with the sealant 21 and the outer sealant 21, so that no bubbles are present in the display area and defective products are generated. The rate can be kept low.

As the liquid crystal exhibiting a chiral smectic phase that can be used in the present invention, a liquid crystal composition containing a plurality of liquid crystal compounds and at least one optically active compound (chiral dopant) is preferably used. Preferred examples of the liquid crystal compound constituting the liquid crystal composition include liquid crystal compounds having the structures of the following general formulas 1 to 5 (including optically active compounds). The compounding ratio of each liquid crystal compound can be appropriately changed to obtain a liquid crystal composition. still,
It is not limited whether or not the liquid crystal compound itself exhibits liquid crystallinity by itself, as long as it properly functions as a liquid crystal component in a liquid crystal composition.

[0041]

Embedded image

P and q are 0, 1, 2, and p + q
Is 1 or 2, and R ₂₁ and R _{22 each} have 1 to 18 carbon atoms.
Wherein one or two or more methylene groups in the alkyl group are -O-, -S-, -CO-,- C
HW -, - CH = CH - , - C≡C- may be replaced by, W is a halogen, CN, a CF _3.

R ₂₁ and R ₂₂ may be optically active.

Y ₁ represents hydrogen or fluorine.

[0045]

Embedded image

Y ₁ represents hydrogen or fluorine;
₂₃ is a linear or branched alkyl group having 1 to 18 carbon atoms, and R ₂₄ is a hydrogen atom, a halogen, a CN group, or a linear or branched alkyl group having 1 to 18 carbon atoms. An alkyl group, and one or two or more methylene groups in the alkyl group represented by R ₂₃ and R ₂₄ may be -O-, -S-, -CO-, -CHW -, -C
H = CH-, -C≡C- may be substituted, and W represents halogen, CN, or CF ₃ . Also, R
₂₃ and R ₂₄ may be optically active.

[0047]

Embedded image

R ₂₅ and R ₂₆ are a linear or branched alkyl group having 1 to 18 carbon atoms, and one of the alkyl groups
One or two or more methylene groups may be -O-, -S-, -CO-, -CHW
—, —CH ＝ CH—, —C≡C— may be replaced, and W represents halogen, CN, or CF ₃ .

Further, R ₂₅ and R ₂₆ may be optically active.

[0050]

Embedded image

R ₂₇ and R _{28 each} represent a linear or branched alkyl group having 1 to 18 carbon atoms.
One or two or more methylene groups may be -O-, -S-, -CO-, -CHW
—, —CH ＝ CH—, —C≡C— may be replaced, and W represents halogen, CN, or CF ₃ .

R ₂₇ and R ₂₈ may be optically active.

[0053]

Embedded image

R ₂₉ and R _{30 each} represent a linear or branched alkyl group having 1 to 18 carbon atoms.
One or two or more methylene groups may be -O-, -S-, -CO-, -CHW
—, —CH ＝ CH—, —C≡C— may be replaced, and W represents halogen, CN, or CF ₃ .

Further, R ₂₉ and R ₃₀ may be optically active.

Preferred examples of the compounds represented by formulas 1 to 4 are shown below.

More preferred examples of the compound of the general formula 1

[0058]

Embedded image

More preferred examples of the compound of the general formula 2

[0060]

Embedded image

More preferred examples of the compound of the general formula 3

[0062]

Embedded image

More Preferred Examples of the Compound of the Formula 4

[0064]

Embedded image

R is a hydrogen atom, a halogen, a CN group, or a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms, and one or two of the alkyl groups
One or more methylene groups may be -O-, -S-, -CO-, -CHW-, -CH = CH
-, -C≡C-, and W
Represents halogen, CN, CF ₃ . R may be optically active.

Y ₁ represents hydrogen or fluorine.

Step-t The injection port of the liquid crystal cell into which the liquid crystal has been injected is sealed with a room temperature curing type epoxy resin or the like, and the panel is washed with a weak alkali.

A polarizing plate is attached and mounted on both sides of the liquid crystal cell manufactured as described above.

[0069]

As described above, when the electrode structure of the present invention is used, damage to the electrodes in the short / wiring resistance inspection step is prevented, the production yield is improved, and the accuracy of the inspection step itself is improved. In addition, a highly reliable liquid crystal element can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one example of a liquid crystal element of the present invention.

FIG. 2 is a sectional view of the liquid crystal device taken along line A-A 'of FIG.

FIG. 3 is a sectional view taken along line B-B 'of the liquid crystal element of FIG.

FIG. 4 is a diagram showing a color filter and a light shielding layer of the liquid crystal element of the present invention.

FIG. 5 is a view showing an auxiliary electrode on the first substrate side of the liquid crystal element of the present invention.

FIG. 6 is a view showing a transparent electrode on a second substrate side of the liquid crystal element of the present invention.

FIG. 7 is a view showing an auxiliary electrode on a second substrate side of the liquid crystal element of the present invention.

FIG. 8 is a view showing a seal pattern of the liquid crystal element of the present invention.

FIG. 9 is a view showing a pad for short-circuit inspection on the second substrate side of the liquid crystal element of the present invention.

FIG. 10 is a view showing a pad for short-circuit inspection on the first substrate side of the liquid crystal element of the present invention.

FIG. 11 is a view showing a dummy wiring and a weir formed on a second substrate of the liquid crystal element of the present invention.

FIG. 12 is a diagram showing the flow of liquid crystal when liquid crystal is injected between the liquid crystal element of the present invention and a conventional liquid crystal element.

FIG. 13 is a view showing a substrate bonding step in the manufacturing method of the present invention.

FIG. 14 is a diagram illustrating a manufacturing process of the first substrate of the liquid crystal element of the present invention.

FIG. 15 is a diagram illustrating a manufacturing process of the second substrate of the liquid crystal element of the present invention.

[Explanation of symbols]

 1a, 1b Insulating substrate 2 Undercoat layer 3 Color filter 4 Flattening layer 5 Barrier layer 6a, 6b Transparent electrode 7a, 7b Auxiliary electrode 8a, 8b Short prevention layer 9a, 9b Rough surface forming layer 10a, 10b Alignment layer 11 Adhesion Beads 12 Spacer beads 13 Liquid crystal layer 14 Light shielding layer 21 Sealant 22 Injection port 23 Dummy wall 31, 32 Drive electrode 33 Pad portion 41 Wiring 42, 43 Weir

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Masaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Yoshinori Shimamura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Kazuya Ishiwatari 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-5-40274 (JP, A) JP-A-7-110495 ( JP, A) JP-A-55-29809 (JP, A) JP-A-5-307163 (JP, A) JP-A-5-5885 (JP, A) JP-A-8-43857 (JP, A) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) G02F 1/1345 G02F 1/1343

Claims (4)

(57) [Claims] 1. A liquid crystal device comprising a pair of electrode substrates in which a stripe-shaped electrode group is arranged so as to be orthogonal to each other and opposed to each other, wherein each electrode is formed by partially laminating a metal wiring on a transparent electrode. comprising a two-layer structure, at both ends drawn outside the display area of the electrode, have a test pad part to expose the transparent electrode, of the electrode group, the narrower the electrode group of the electrode width ,
Inspection pads of each electrode are shifted in the longitudinal direction every other one
And the electrode width in the inspection pad portion is
Inspection of adjacent electrodes that are widely formed and furthermore each electrode
The transparent electrode at the narrow electrode width adjacent to the pad
Electrode structure of the liquid crystal element characterized in that was issued. 2. An electrode having a larger electrode width in the electrode group.
2. The electrode structure of a liquid crystal element according to claim 1 , wherein in the pole group, metal wiring is laminated on both sides of the inspection pad portion of each electrode in the electrode width direction . 3. The electrode structure of the liquid crystal device according to claim 1 or 2 having a dummy electrode outside the display area. 4. An electrode group having a stripe shape is set to be orthogonal to each other.
The liquid crystal is sandwiched between a pair of electrode substrates
A liquid crystal element having the electrode structure according to claim 1.