JP2001033803A - Liquid crystal display panel and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a liquid crystal display panel improved in the reliability of a transfer member between two opposed glass substrates. SOLUTION: In this liquid crystal panel, a 1st glass substrate 2 with a thin film transistor layer 3 formed thereon and a 2nd glass substrate 5 with a transparent counter electrode layer 9 are adjacently arranged facing each other and liquid crystal 17 is charged in the gap part between them. In the panel, at least in a part of the peripheral part of the liquid crystal display panel, transfer members 13 are arranged, which are composed of a granular body 14 on which stress concentration parts 20 formed of one kind of shape selected from at least a projecting part, an acicular part, a horned part, and a rugged part are partly formed, for electrically connecting the thin film transistor layer 3 or another electrode layer 4 co-operating with the thin film transistor layer on the 1st glass substrate with the transparent counter electrode 9 on the 2nd glass substrate 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel and a method of manufacturing the liquid crystal display panel, and more particularly, to a liquid crystal having improved electrical conductivity between first and second glass substrates. The present invention relates to a display panel and a method for manufacturing the same.

[0002]

2. Description of the Related Art The structure and operation of a liquid crystal display panel 1 which has been generally used will be described below with reference to FIG.

That is, as shown in FIG. 7, a metal film, an insulating film, and an a-Si layer are formed on a first glass substrate 2 by using a sputtering method or a plasma CVD method, and are further formed by using a photolithography method. A thin film transistor layer 3 formed by forming a pattern is formed, and a COM electrode 4 is formed on the same glass substrate 2 using a part of the metal film.

On the other second glass substrate 5, a colored layer B
An M layer 7, an overcoat layer 8, and a transparent electrode layer 9 made of ITO are formed.

Thereafter, for example, a polyimide-based alignment film 10 is coated on the uppermost surfaces of the first and second glass substrates 2 and 5, that is, the opposite surfaces of the two glass substrates 2 and 5 to align the liquid crystal material. Then, rubbing is performed by rubbing the surface of the alignment film 10 in a certain direction with a buff cloth wound around a rotating metal roller as an alignment treatment after firing.

At this time, a part of the COM electrode formed on the first glass substrate 2 and a part of the transparent electrode layer 9 formed on the second glass substrate 5 are both transferred at the time of superposition described later. The alignment film is not applied to make electrical connection via the material.

Accordingly, the application of the alignment film 10 to the baking,
Through a series of steps up to rubbing, shavings from the alignment film 10, buff cloth, and floating dust remain on the surfaces of the first glass substrate 2 and the second glass substrate 5.

Therefore, after the rubbing step, the surfaces of the first glass substrate 2 and the second glass substrate are cleaned.

Similarly, also on the surface of the COM electrode 4 formed on the first glass substrate 2 and the transparent electrode layer 9 formed on the second glass substrate 5, a portion where a metal surface is to be exposed is provided. The thin insulating film 11 and the shavings from the alignment film by the alignment film 10 adhered at the time of application of the alignment film 10, and the high-resistance metal oxide film 11 are generated on the metal surface by baking.

The thickness of the insulating film 11 is 100 to 2
The thickness of the metal oxide film 11 is in the range of 100 to 1000 angstroms.

The insulating film and the metal oxide film 11 are substances that affect the electrical connection. These substances can be removed to some extent by washing, but are not sufficient. After the above-described cleaning, an epoxy resin is applied as a sealant 12 to the outer peripheral portion of the second glass substrate 5 using a printing method or a dispenser.

Subsequently, a transfer member 13 is applied to the upper surface of the COM electrode 4 formed on the first glass substrate 2 to make an electrical connection with the transparent electrode layer 9 on the second glass substrate 5.

[0013] As shown in FIG.
As 3, a paste obtained by mixing Ag fine particles 14 with an epoxy-based solvent 15 was used, and the diameter of the Ag fine particles 14 was 0.5
It has a spherical shape with a size of about 2 μm.

In the application method, application is performed on a desired portion using a dispenser. The application area is a square of 1 to 3 mm or a perfect circle of about 1 to 3 mm in diameter. Therefore, the operation setting of the dispenser is complicated so that the transfer material 15 does not adhere to portions other than the application portion and is applied in a desired size. At this time, the step of applying the transfer material 13 may be performed before the application of the sealing material 12.

After the transfer member 13 is applied, a plastic spacer 16 is sprayed on the upper surface of the alignment film 10 of the first glass substrate 2. The diameter of the spacer 16 is 4.5 μm.

After that, the first glass substrate 2 and the second glass substrate 5 are superposed on each other with the alignment film surfaces. After the superposition, the sealing material and the transfer material which have already been applied are cured by simultaneously heating and pressing at 160 ° C. for 30 minutes. The pressure at this time is 0.2 to 2 kgf / cm
Perform in 2 ↑.

The gap at the time of overlapping the first glass substrate 2 and the second glass substrate 5 is adjusted to the same gap as the diameter of the dispersed spacer of 4.5 μm.

As shown in FIG. 8, the Ag particles in the transfer material 13 already applied at this time are separated from the surface of the COM electrode formed on the first glass substrate and the transparent Ag particles formed on the second glass substrate. Electrical connection with the conductive film is enabled.

Further, the first superposed with a desired gap
Liquid crystal material 1 in the gap between the glass substrate 2 and the second glass substrate 5
7, and the injection port 18 is sealed with a photo-curing epoxy resin to complete the liquid crystal display panel 1.

Here, in the conventional transfer material 15,
When an insulating film 11 made of an organic or inorganic substance is attached to the surface of the thin film transistor layer 3 or the COM electrode 4 or the transparent electrode layer 9 which is a connection surface, or a high-resistance metal oxide film 11 is formed, a second glass which is a counter electrode Conduction with the transparent electrode 9 on the substrate 5 could not be obtained, and problems such as poor conduction occurred.

Therefore, on the first glass substrate 2 from the outside,
For example, the voltage applied to the COM electrode 4 is not applied to the transparent electrode layer 9 formed on the second glass substrate 5 as the counter electrode, and as a result, the operation of the liquid crystal display panel 1 becomes defective.

The reason why such a problem occurs is as follows.
Ag particles 1 of Ag paste as transfer material 15
The shape of No. 4 was substantially spherical, and the particle size was smaller than the gap between two different glass substrates 2 and 5 superimposed.

Therefore, when the two glass substrates 2 and 5 are overlapped with each other, a pressurizing process is performed. In the pressurizing operation at that time, the solvent layer becomes a buffer material and the conductive particles 14 The electrode formed on the first glass substrate 2 and the second glass substrate 5, for example, the contact with the COM electrode 4 is relieved, and the insulating film or the high-resistance metal oxide film 11 on the surface of the electrode layer 3, 4 or 9 is destroyed. Or cannot penetrate.

On the other hand, in the structure disclosed in JP-A-6-308516, "a transparent electrode on a pair of substrates is connected via a common transition material, and the common transition material is a thermosetting resin containing conductive particles. The size of the particles was larger than the distance between the pair of substrates. "

However, in the known example, there is no description on the surface shape of the conductive particles, merely by increasing the particle size. Also adheres to the COM electrode or transparent electrode layer surface,
There is no description about a technique for penetrating and breaking the generated insulating film and high-resistance metal oxide film 11.

Therefore, none of the production methods and structures which have been carried out up to now and the previously disclosed techniques can overcome the above-mentioned disadvantages.

Japanese Patent Application Laid-Open No. 9-90375 discloses that a transfer member in a liquid crystal display panel comprises a photocurable resin and metal particles dispersed in the resin or resin spheres having a conductive surface. Although there is a description regarding the use of a material, the particles are merely described as being spherical, and a structure for destroying an insulating film formed on the surface of the electrode portion as in the present invention. Is not described at all.

On the other hand, Japanese Patent No. 2835145 discloses that
When connecting the wiring electrodes formed on the substrate and the electrodes formed on the surface of the IC chip connected face-down to the substrate facing the substrate, nickel-particles in the shape of a wiggle are interposed between the electrodes. Although a technique for improving the electrical connection between the substrate and the IC chip arranged is described, in the known example, the liquid crystal display panel is provided between two glass substrates sandwiching liquid crystal. There is no description of the improved transfer member.

[0029]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the above-mentioned disadvantages of the prior art and improve the reliability of a transfer member between two opposing glass substrates. And a method for manufacturing a liquid crystal display panel.

[0030]

The present invention basically employs the following technical configuration to achieve the above object.

That is, as a first aspect according to the present invention,
A gap portion in which at least a first glass substrate on which a thin film transistor layer is formed and at least a second glass substrate on which a transparent counter electrode layer is formed are disposed adjacent to each other with the thin film transistor layer and the transparent counter electrode layer facing each other; In a liquid crystal display panel in which liquid crystal is sealed, the thin film transistor layer or another electrode layer cooperating with the thin film transistor layer on the first glass substrate is provided on at least a part of a peripheral portion of the liquid crystal display panel. At least a stress concentration portion having at least one shape selected from a protrusion, a needle, a corner, and a concavo-convex portion for electrically connecting the stress-concentrating portion to the transparent counter electrode layer on the second glass substrate is partially formed. A liquid crystal display panel provided with a transfer portion composed of a granular material formed on a liquid crystal display panel. The first glass substrate on which the transistor layer is formed and the second glass substrate on which at least the transparent counter electrode layer is formed are provided in a gap portion where the thin film transistor layer and the transparent counter electrode layer are arranged adjacent to each other. In manufacturing a liquid crystal display panel in which liquid crystal is sealed, the first liquid crystal display panel is provided on at least a part of the periphery of the liquid crystal display panel.
Electrically connecting the thin film transistor layer or another electrode layer cooperating with the thin film transistor layer on the glass substrate with the transparent counter electrode layer on the second glass substrate; This is a method for manufacturing a liquid crystal display panel configured to form a transfer portion including a granular material in which a stress concentration portion having one shape selected from a portion, a corner portion, and an uneven portion is partially formed.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid crystal display panel and the method for manufacturing the liquid crystal display panel according to the present invention employ the above-described technical configuration. Therefore, a thin film transistor is formed on one glass substrate, By disposing a transparent conductive layer as a counter electrode on the other glass substrate, and partially or entirely overlapping both glass substrates by heating and pressing,
A part of the conductive layer forming the thin film transistor layer is electrically connected to a counter electrode made of a transparent conductive layer formed on the other glass substrate via a conductive transfer material. In the liquid crystal display panel formed by sealing the injection port, a thermosetting resin has a surface with irregularities as a transfer material, and is provided in a gap d between the superposed glass substrates. On the other hand, the conductive adhesive is characterized in that conductive particles having a diameter D whose diameter is satisfied by a relational expression of D = d ± α μm and α = 1 to 3 μm are included.

Further, the present invention is characterized in that the conductive particles are metal particles such as nickel, cobalt and titanium, or metal particles such as nickel and gold are applied to plastic particles. .

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display panel and a specific example of a method of manufacturing the liquid crystal display panel according to the present invention will be described below in detail with reference to the drawings.

That is, FIG. 1 is an exploded perspective view showing the structure of one embodiment of the liquid crystal display panel according to the present invention, and FIG. 2 is an exploded perspective view showing the structure of the liquid crystal display panel according to the present invention. A partial cross-sectional view showing the configuration of a specific example is shown.
At least the first glass substrate 2 on which the thin film transistor layer 3 is formed and the second glass substrate 5 on which at least the transparent counter electrode layer 9 is formed, with the thin film transistor layer 3 and the transparent counter electrode layer 9 facing each other. In the liquid crystal display panel 1 in which the liquid crystal 17 is sealed in the adjacently disposed gap,
At least a part of the peripheral portion of the liquid crystal display panel 1 is provided with the thin film transistor layer 3 in the first glass substrate 2 or another electrode layer 4 cooperating with the thin film transistor layer and the second glass substrate 5. A granular body in which at least a stress concentration portion 20 having at least one shape selected from at least a protrusion, a needle, a corner, and an uneven portion electrically connecting the transparent counter electrode layer 9 is formed; The liquid crystal display panel 1 provided with the transfer member 13 constituted by 14 is shown.

The transfer member 13 used in the liquid crystal display panel 1 according to the present invention includes the granular material 1.
4 and a resin component 15 are desirable.

Furthermore, the maximum diameter D of the granular material 14 used in the liquid crystal display panel 1 according to the present invention is determined by the distance between the first glass substrate 2 and the second glass substrate 5. Is d, D = d ± αμm and α is α = 1
It is represented by a relational expression that can be selected from the range of 3 μm.

In the present invention, α is α = 2 μm
Is desirable.

The resin component 15 used in the present invention is preferably a thermosetting resin.

On the other hand, the granular material 14 used in the liquid crystal display panel 1 according to the present invention may be made of a conductive material, and may be selected from, for example, nickel and cobalt. It is preferable that the metal particles are used, and it is also preferable that the granular material is a granular material obtained by applying metal plating to plastic particles.

Further, the liquid crystal display panel 1 according to the present invention
As the other electrode layer cooperating with the thin film transistor layer 3 on the first glass substrate 2 used in the above, a so-called COM electrode may be used.

In the liquid crystal display panel 1 according to the present invention, the thin film transistor layer 3 or the COM electrode film layer 4 in the first glass substrate 2 and the liquid crystal display panel 1 in the second glass substrate 5 It is preferable that at least a part of the insulating film, oxide film, metal oxide film, or the like 11 formed on the transparent counter electrode layer 9 is broken by the stress concentration portion 20 of the granular material 14.

In other words, in other words, in the liquid crystal display panel 1 according to the present invention, the thin film transistor layer 3 or COM in the first glass substrate 2
The electrode film layer 4 and the transparent counter electrode layer 9 in the second glass substrate 5 are formed by the granular material penetrating through at least a part of the insulating film or the oxide film 11 formed on the surface of each layer. 14 are electrically connected to each other via the stress concentration portion 20 and a portion continuous therewith.

In FIG. 1, reference numeral 21 denotes a drain electrode for forming the thin film transistor layer, and reference numeral 22 denotes a gate electrode.

That is, the liquid crystal display panel 1 according to the present invention.
More specifically, a thin film transistor 3 is formed on one glass substrate (first glass substrate) 2 and a transparent conductive layer is formed on the other glass substrate (second glass substrate) 5 as a counter electrode. 9 on both glass substrates 2, 5
Are partially or entirely superimposed by heating and pressurizing to form a part of the conductive layer forming the thin film transistor layer 3 and the transparent conductive layer 9 formed on the other glass substrate 5.
And a conductive transfer member 13
And a liquid crystal material 17 is injected into the gap between the glass substrates 2 and 5 through an injection hole 18, and then the injection hole 18 is sealed with an appropriate sealing material 23. In the above, as the transfer member 13,
The surface of the thermosetting resin 15 has a stress concentration portion 20 having, for example, an uneven shape, and the diameter D of the gap d between the superposed glass substrates 2 and 5 is D = d ± α
It is characterized in that the conductive adhesive has conductive particles 14 of a size satisfying the relational expression of μm, α = 1 to 3 μm.

That is, the liquid crystal display panel 1 according to the present invention.
In at least a part of the periphery of the two glass substrates 2 and 5, the thin film transistor layer 3 or C
In order to ensure the electrical connection between the OM electrode film layer 4 and the transparent counter electrode layer 9, the apparent diameter including the stress concentration portion in the conductive particles 14 is reduced to the glass substrate 2.
By disposing conductive particles 14 formed larger than the gap between 5 and an appropriate resin, and forcibly deforming the distal end of the stress concentration portion 20 of the conductive particles 14 by heating and pressing, At this time, the tip of the stress concentration portion 20 removes the oxide film or the insulating film so as to scratch a part of the oxide film or the insulating film. As a result, the first glass substrate 2 is connected to the first glass substrate 2 via the conductive particles 14. The thin film transistor layer 3 or the COM electrode film layer 4 on the second glass substrate 5
And the transparent counter electrode layer 9 can be electrically conducted reliably.

Hereinafter, a more detailed configuration of the liquid crystal display panel 1 according to the present invention will be described in the form of an embodiment with reference to the drawings, including an example of a manufacturing method.

FIG. 3 is a perspective view showing a state where the conductive adhesive used as a transfer member is temporarily fixed on a base tape. FIG. 4 shows the shape of conductive particles contained in the conductive adhesive. FIG.

First, as shown in FIG. 1, a metal film such as Cr, Al, ITO or the like or an insulating film 24 such as SiNx is laminated on a first glass substrate 2 to form a drain electrode 21 and a gate electrode 2.
2, a thin film transistor layer 3 and a COM electrode 4 are formed.

On the other hand, the colored layer 6 on the second glass substrate 5
BM layer 7, overcoat layer 8, ITO as counter electrode
And the like.

On the upper surfaces of the first glass substrate 2 and the second glass substrate 5, for example, a polyimide-based alignment film 10 is applied to align the liquid crystal material 17.

An epoxy-based thermosetting resin is applied as a sealing material 12 to the periphery of either one of the glass substrates 2 and 5, and the coated surfaces of the alignment films 10 are overlapped and bonded by heating and pressing.

In this example, the seal application surface was on the second glass substrate 5.

On the other hand, on the surface of the first glass substrate 2, a plastic spacer 6 which is a gap holding material between the first glass substrate 2 and the second glass substrate 5 to be superposed is inserted.

The injection hole 1 is formed in a part of the coating portion of the seal 12.
8 is provided, and a liquid crystal material 17 is injected into a gap between the first glass substrate 2 and the second glass substrate 5 which are overlapped through the injection hole 18.

The injection hole 18 is then sealed with a suitable sealing material 23 to obtain the liquid crystal display panel 1.

At this time, the conductive adhesive 15 containing the conductive particles 14 disposed on a part of the COM electrode 4 formed on the first glass substrate 2 is applied to the COM electrode 4 on the first glass substrate 2. And a transfer member 13 for electrically connecting between the transparent conductive films 9 formed on the second glass substrate 5.

As shown in FIG. 2, the first glass substrate 2 and the second glass substrate 5 are superposed by heating and pressing to form conductive particles 14 contained in the conductive adhesive 15.
Is in contact with the surface of the COM electrode 4 on the first glass substrate 2 and the transparent conductive film 9 on the second glass substrate 5 to electrically connect them. Further, as shown in FIG. 4, the shape of the conductive particles 14 is a shape having a stress concentration portion 20 having one shape selected from a projection, a needle, a corner, and an uneven portion on the surface.

The insulating film adhered and formed on the surface of the COM electrode 4 or the transparent conductive film 9 formed on the second glass substrate 5 due to the convex shape or needle shape of the surface of the conductive particles 14. 11 penetrates or breaks, thereby ensuring both electrical continuity.

Further, as shown in FIGS. 3 and 4, the conductive adhesive 15 constituting the transfer member 13 in the present invention has the conductive particles 14 therein, and the particle diameter D is shown in FIG. A pair of superposed glass substrates 2, 5
The size is such that the relational expression of D = d ± α μm, α = 1 to 3, preferably α = 2 μm is satisfied with respect to the gap d, and the surface has an uneven shape.

In the liquid crystal display panel 1 formed by the above method, a voltage is externally applied to each of the gate electrode 22, the source electrode, and the COM electrode 4.

The C formed on the first glass substrate 2
The voltage applied to the OM electrode is applied to the transparent electrode layer 9 formed on the second glass substrate 5 serving as the counter electrode via the conductive particles 14 in the transfer member 13 made of a conductive adhesive.

Here, the method of manufacturing the liquid crystal display panel 1 according to the present invention will be described in more detail with reference to FIG.
As shown in (1), the operation of the liquid crystal display panel 1 according to the present invention is such that a metal film, an insulating film, a-Si
The layer is formed by sputtering or plasma CVD,
Further, a desired pattern is formed by using a photolithography method to form a drain electrode 21, a gate electrode 22, a COM electrode 4, and a thin film transistor layer 3.

On the other second glass substrate 5, a colored layer 6
A BM layer 7, an overcoat layer 8, and a transparent electrode layer 9 serving as a counter electrode are formed. Further, a buff cloth coated with a polyimide-based alignment film 10 on the upper surfaces of the first glass substrate 2 and the second glass substrate 5 for alignment of the liquid crystal material 17, and baked around a rotating metal roller as an alignment treatment after firing. Is performed to rub the surface of the alignment film in a certain direction.

At this time, a part of the COM electrode 4 formed on the first glass substrate 2 and a part of the transparent electrode layer 9 on the second glass substrate 5 are provided with the both-side transfer member 13 at the time of superposition described later. Film 1 for making electrical connection through
0 is not applied.

Therefore, through a series of steps from the application of the alignment film 10 to the firing and rubbing, the surfaces of the first glass substrate 2 and the second glass substrate 5 are aligned.
Chips, buff cloth dust, and floating dust are left. Therefore, after the rubbing step, the first glass substrate 2 and the second glass substrate 5
Wash the surface.

Similarly, in the surface of the COM electrode 4 formed on the first glass substrate 2 and the transparent electrode layer 9 formed on the second glass substrate 5, the alignment is performed in a portion where the metal surface should be exposed. The thin insulating film or the shavings from the alignment film due to the alignment film attached at the time of coating the film 10, or the high-resistance metal oxide film 11 is generated on the metal surface by firing.

The thickness of the insulating film 11 is 100 to 200
The thickness varies in the range of 0 Å, and the thickness of the metal oxide film 11 is in the range of 100 to 1000 Å. These insulating films and metal oxide films 11 are substances that affect electrical connection.

Although these substances can be removed to some extent by washing, they are not sufficient.

After the washing, an epoxy resin is applied to the outer peripheral portion of the second glass substrate 5 as a sealing material 12 by using a printing method or a dispenser.

Subsequently, a transfer member 13 having a desired size is formed on the upper surface of the COM electrode 4 formed on the first glass substrate 2 so as to electrically connect with the transparent electrode layer 9 on the second glass substrate 5. The conductive adhesive 15 is transferred.

The conductive adhesive 15 has a main component of a thermosetting epoxy resin and contains conductive particles 14 therein. The diameter of the conductive particles 14 was 5 μm, and the shape thereof was Ni particles having irregularities on the surface.

In this example, the size of the transfer member 13 made of the conductive adhesive 15 was a square of 2 mm, and four transfer portions were provided.

As shown in FIG. 3, the transfer member 13 including the conductive adhesive 15 is in the form of a film temporarily fixed on a base tape 25 made of polyethylene terephthalate, and the thickness of the conductive adhesive 15 is 10 μm. .

The form of the conductive adhesive temporarily fixed on the base tape 25 is a roll wound on a reel or a sheet.

As a transfer method, the transfer member 13 made of a conductive adhesive is cut into a desired size together with the temporarily fixed base tape.

The transfer member 13 made of the cut-out conductive adhesive is provided on the first glass substrate 2 with the metal electrode exposed on the first glass substrate 2.
And heat from the base tape surface to 60 ° C for 2 seconds.
By applying pressure, it is transferred to the surface of the COM electrode 4. The pressure at this time is 1 to 5 kgf / cm @ 2. After the transfer, the base tape 25 and the transfer member 13 made of a conductive adhesive are peeled off.

The transfer step of the transfer member 13 may be performed before the application of the sealing material 12.

After the transfer of the transfer member 13, a plastic spacer 16 is sprayed on the upper surface of the alignment film 10 of the first glass substrate 2. The diameter of the spacer 16 is 4.5 μm.

Thereafter, the first glass substrate 2 and the second glass substrate 5 are superposed on each other with the alignment film surfaces thereof. After the overlapping, the sealing material 12 and the transfer member 13 which have already been applied are cured by heating and pressing at 160 ° C. for 30 minutes. The pressure at this time is 0.5 to 5 kgf / cm
Perform within 2 mm.

The gap when the first glass substrate 2 and the second glass substrate 5 are overlapped with each other is
Is adjusted to the same gap as the diameter of 4.5 μm.

As shown in FIG. 2, the conductive particles 14 existing in the transfer member 13 already transferred at this time have irregularities or needle-like shapes on the surface thereof, so that the conductive particles 14 have a desired pressure at the time of superposition. And the convex shape of the surface causes the insulating film 11 or the metal oxide film 11 on the surface of the COM electrode 4 formed on the first glass substrate to penetrate by the applied pressure, 2 enables electrical connection with the transparent conductive film 9 formed on the glass substrate 5. Therefore, the first glass substrate 2 and the second
There is no effect on the gap size of the glass substrate 5.

As shown in FIG. 5, when the conductive particles 14 are smaller than the gap between the superposed first glass substrate 2 and second glass substrate 5, the adjacent conductive particles 14 The size of the entangled and entangled conductive particles at the portion is equal to or larger than the gap between the first glass substrate 2 and the second glass substrate 5.

Further, the pressure applied at the time of the superposition is received by the entangled conductive particles via the first glass substrate 2 and the second glass substrate 5. Therefore, there is no influence on penetration, destruction, and electrical connection of the insulating film or the high-resistance oxide film.

Further, the liquid crystal material 17 is injected into the gap between the first glass substrate 2 and the second glass substrate 5 which are overlapped at a desired gap, and the injection port 18 is filled with a photo-curing epoxy resin 23. After sealing, the liquid crystal display panel 1 is established.

In the completed liquid crystal display panel 1, a voltage is externally applied to each of the gate electrode, the source electrode, and the COM electrode.

The C formed on the first glass substrate 2
The voltage applied to the OM electrode 4 is
The voltage is applied to the transparent electrode layer 9 formed on the second glass substrate 5 serving as a counter electrode via the conductive particles 14 in 3.

Next, another specific example of the liquid crystal display panel according to the present invention will be described in detail with reference to FIG.

FIG. 6 is a cross-sectional view of another specific example of the liquid crystal display panel 1 using the present invention. Also, 4b is:
FIG. 4B is an external view of the conductive particles 14 included in the conductive adhesive 15. As shown in FIG. 4B, the surface of the conductive particles 14 has a needle shape 20.

As shown in FIG. 6, the conductive particles 14 contained in the conductive adhesive 15 are deformed by the pressure at the time of superposition, and the surface of the stress concentration portion 20 has a needle shape. The insulating film 11 or the metal oxide film 11 on the surface of the COM electrode 4 formed on the first glass substrate 2 is penetrated by the applied pressure, and the second glass substrate 5
Electrical connection with the transparent conductive film formed thereon is enabled. Therefore, there is no influence on the gap size between the first glass substrate 2 and the second glass substrate 5.

As described above, the method for manufacturing a liquid crystal display panel according to the present invention includes, for example, a first glass substrate on which at least a thin film transistor layer is formed and a second glass substrate on which at least a transparent counter electrode layer is formed. When manufacturing a liquid crystal display panel in which liquid crystal is sealed in a gap disposed adjacent to the thin film transistor layer and the transparent counter electrode layer facing each other, at least a part of a peripheral portion of the liquid crystal display panel, At least a protrusion for electrically connecting the thin film transistor layer on the first glass substrate or another electrode layer cooperating with the thin film transistor layer to the transparent counter electrode layer on the second glass substrate; , Transfer including a granular material partially formed with a stress concentration part of one shape selected from needle-shaped part, corner part, uneven part It is a manufacturing method of a liquid crystal display panel to form a timber.

In the method of manufacturing a liquid crystal display panel according to the present invention, it is desirable that the transfer member 13 is composed of the granular material 14 and the thermosetting resin component 15.

Further, in the present invention, it is preferable that the granular material is a metal particle selected from nickel and cobalt, or a granular material obtained by plating a plastic-based particle with metal.

Further, in the present invention, when the first glass substrate 2 and the second glass substrate 5 are opposed to each other and pressurized, the first glass substrate 2 and the second glass substrate 5 At least a part of the insulating film or the oxide film 11 formed on the thin film transistor layer 3 or the COM electrode film layer 4 and the transparent counter electrode layer 9 in the second glass substrate 5 is subjected to the stress concentration of the granular material 14. It is characterized by being destroyed by the part 20.

[0095]

The liquid crystal display panel and the method of manufacturing the liquid crystal display panel according to the present invention employ the above-described technical configuration, and therefore, the liquid crystal display panel uses organic or inorganic substances adhered or generated in the process of manufacturing the liquid crystal display panel. There is an effect that the insulating film 11 or the high-resistance oxide film 11 is broken or penetrated by the conductive particles 14 in the transfer member 13 made of the conductive adhesive 15 so that an electrical connection can be made.

The conductive particles 1 existing in the transfer member 13 composed of the conductive adhesive 15 according to the present invention.
Since the diameter of 4 is equivalent to the gap between the two glass substrates 2 and 5 facing each other, the conductive particles 14 themselves are directly subjected to pressure during manufacturing, and the shape thereof has an uneven shape.
Can easily penetrate the insulating film or the high-resistance film 11.

In the conductive adhesive according to the present invention, the diameter of the conductive particles 14 contained therein is equivalent to the gap between the two glass substrates facing each other. Has a concavo-convex shape, and the tip of the convex portion can easily penetrate the insulating film or the high-resistance film.

Further, by making the shape of the transfer member 13 into a thin film or sheet shape, the transfer member 13 made of the conductive adhesive 15 having a desired size can be formed on the glass substrate by an easy operation such as transfer. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a specific example of a configuration of a liquid crystal display panel according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing a specific example of a configuration of a liquid crystal display panel according to the present invention.

FIG. 3 is a perspective view showing a specific example of a configuration of a transfer member used in the present invention.

FIG. 4 is a diagram showing a configuration example of a conductive granular material used in the present invention.

FIG. 5 is a partially enlarged sectional view showing an example of the configuration of a conventional liquid crystal display panel.

FIG. 6 is a partially enlarged cross-sectional view showing another specific example of the configuration of the liquid crystal display panel according to the present invention.

FIG. 7 is an exploded perspective view showing a specific example of a configuration of a conventional liquid crystal display panel.

FIG. 8 is a partially enlarged sectional view showing another example of the configuration of the conventional liquid crystal display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel 2 ... 1st glass substrate 3 ... Thin film transistor layer 4 ... Other electrode layer, COM electrode 5 ... 2nd glass substrate 6 ... Coloring layer 7 ... BM layer. DESCRIPTION OF SYMBOLS 8 ... Overcoat layer 9 ... Transparent counter electrode layer 10 ... Orientation film 11 ... Insulating film, oxide film 12 ... Seal material 13 ... Transfer member 14 ... Granular material 15 ... Resin component 16 ... Spacer 17 ... Liquid crystal 18 ... Injection hole 20 ... Stress concentration portion 21: drain electrode 22: gate electrode 23: sealing material 24: insulating film

Claims (18)

[Claims] At least a first glass substrate on which a thin film transistor layer is formed and a second glass substrate on which at least a transparent counter electrode layer are formed are adjacent to each other with the thin film transistor layer and the transparent counter electrode layer facing each other. In a liquid crystal display panel in which liquid crystal is sealed in a gap provided, at least a part of a peripheral portion of the liquid crystal display panel is provided with the first liquid crystal.
At least a protruding portion and a needle-shaped portion for electrically connecting the thin film transistor layer or another electrode layer cooperating with the thin film transistor layer on the glass substrate and the transparent counter electrode layer on the second glass substrate. A liquid crystal display panel, comprising: a transfer portion formed of a granular material in which a stress concentration portion having one shape selected from a corner portion and an uneven portion is partially formed. 2. The liquid crystal display panel according to claim 1, wherein the transfer section is composed of the granular material and a resin component. 3. A relational expression of D = d ± α μm and α = 1 to 3 μm, where D is a gap between the first glass substrate and the second glass substrate. 3. The liquid crystal display panel according to 1 or 2, wherein 4. The liquid crystal display panel according to claim 3, wherein said α = 2 μm. 5. The liquid crystal display panel according to claim 2, wherein said resin component is a thermosetting resin. 6. The liquid crystal display panel according to claim 1, wherein the granular material has conductivity. 7. The granular material according to claim 6, wherein the granular material is a metal particle selected from nickel and cobalt, or a granular material obtained by applying a metal plating to a plastic-based particle.
Liquid crystal display panel as described. 8. The liquid crystal display panel according to claim 1, wherein the thin film transistor layer or another electrode layer cooperating with the thin film transistor layer on the first glass substrate is a COM electrode. 9. An insulating film or an oxide film formed on the thin film transistor layer or the COM electrode film layer on the first glass substrate and the transparent counter electrode layer on the second glass substrate. 9. The liquid crystal display panel according to claim 1, wherein the portion is broken by the stress concentration portion of the granular material. 10. The thin film transistor layer or the COM electrode film layer on the first glass substrate and the second
The transparent counter electrode layers in the glass substrate are electrically connected to each other through the stress concentration portions of the granular material that penetrate through at least a part of the insulating film or the oxide film formed on the surface of each layer. 9. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is connected. 11. A first glass substrate on which at least a thin film transistor layer is formed and a second glass substrate on which at least a transparent counter electrode layer is formed are adjacent to each other with the thin film transistor layer and the transparent counter electrode layer facing each other. When manufacturing a liquid crystal display panel in which liquid crystal is sealed in the arranged gap, at least a part of the periphery of the liquid crystal display panel is cooperated with the thin film transistor layer or the thin film transistor layer on the first glass substrate. At least a protruding portion, a needle-like portion, and the like, which electrically connect another working electrode layer and the transparent counter electrode layer on the second glass substrate.
A method for manufacturing a liquid crystal display panel, comprising forming a transfer portion including a granular material in which a stress concentration portion having one shape selected from a corner portion and an uneven portion is partially formed. 12. The method for manufacturing a liquid crystal display panel according to claim 11, wherein said transfer portion is composed of said granular material and a thermosetting resin component. 13. A relational expression of D = d ± αμm and α = 1 to 3 μm, where d is a gap between the first glass substrate and the second glass substrate. The method for manufacturing a liquid crystal display panel according to claim 11, wherein: 14. The method for manufacturing a liquid crystal display panel according to claim 13, wherein said α = 2 μm. 15. The method according to claim 11, wherein the resin component is a thermosetting resin. 16. The method for manufacturing a liquid crystal display panel according to claim 11, wherein the granular material has conductivity. 17. The liquid crystal display according to claim 16, wherein the granular material is a metal particle selected from nickel and cobalt, or a granular material obtained by applying a metal plating to a plastic-based particle. Panel manufacturing method. 18. When the first glass substrate and the second glass substrate are opposed to each other and are subjected to a pressure treatment, the thin film transistor layer or the COM electrode film layer and the second glass substrate on the first glass substrate. 18. The glass substrate according to claim 11, wherein at least a part of the insulating film or the oxide film formed on the transparent counter electrode layer is broken by the stress concentration portion of the granular material. A method for manufacturing a liquid crystal display panel according to the above item.