JPH09258198A - Liquid crystal panel and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain flatness of a protective film which is formed to cover a color filter layer and to prevent deterioration in display quality. SOLUTION: This liquid crystal panel consists of plural colors of color filter layers FIL(R), FIL(G), FIL(B) divided by a black matrix MB comprising a light-absorbing material formed on a transparent substrate SUB2, a protective film PSV2 formed to cover the color filter layers, a transparent electrode ITO2 on the protective film PSV2, and an orienting film ORI2 formed to cover the transparent electrode. In this method, the protective film PSV2 applied to smoothen the surface roughness of the color filter layers consists of a thermosetting org. transparent resin which is highly crosslinked before the thermosetting process and has photosetting property with high sensitivity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel, and more particularly to a liquid crystal panel in which the flatness of a color filter layer formed on a transparent substrate is improved and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices have been used in many fields as image display devices.

This type of liquid crystal display device includes an upper frame having a display window, a liquid crystal panel composed of a pair of transparent substrates, at least one of which is a glass substrate integrated with a drive circuit substrate, a light diffusing plate and a light guide plate. A light guide assembly which is a back-lighting member composed of, for example, an intermediate frame on which a linear backlight source is mounted on at least one side, a lower frame, and the like, which are laminated in the above order, and the upper frame and the lower In general, the frame is connected and fixed. In addition, there is also a type in which the intermediate frame and the lower frame are integrated.

A pair of glass substrates constituting the liquid crystal panel have a scanning electrode, a signal electrode, an alignment film, and other functional film groups on the liquid crystal facing surface, and a gap between them is made of silica or plastic. A pair of substrates is held at a predetermined cell thickness (hereinafter, simply referred to as a gap) by dispersing and interposing minute spacers having a substantially spherical shape or a circular cross section.

In a color-compatible liquid crystal display device, a color filter layer of a plurality of colors is formed on the inner surface of one of the pair of glass substrates (for example, an upper glass substrate). A functional film group such as a transparent electrode is formed, and the one glass substrate or the other glass substrate (lower glass substrate) is provided with a transparent electrode for signal application (a thin film transistor or the like as a control means for controlling lighting / non-lighting of pixels). In an active type liquid crystal display device such as a TFT type using a switching element of the type described above, a lower glass substrate has a functional film different from the above one glass substrate such as a switching element such as a thin film transistor for pixel selection and its signal electrode). Groups are provided.

The prior art of this type of liquid crystal display device is disclosed in JP-B-51-13666 and JP-A-63-309921.

[0007]

In order to color the liquid crystal display device, it is necessary to form color filters of a plurality of colors on one glass substrate of the liquid crystal panel constituting the liquid crystal display device.

In this color filter, color filter layers of at least three colors (red: R, green: G, blue: B) are divided on the surface of the glass substrate by a black matrix made of a light-absorbing substance, and the black matrix is formed thereon. A transparent electrode film is formed on the substrate, and an alignment film that is in contact with the liquid crystal layer is formed to form a so-called color filter substrate.

Between the color filter layer and the transparent electrode layer, the color filter layer is protected from the external environment, impurities are prevented from flowing out to the liquid crystal layer, and the flatness of the surface of the color filter layer is improved. For this purpose, a protective film made of transparent resin is formed.

This protective film is generally known as a method of forming a thermosetting resist film covering the color filter layer and hardening it in a baking process, or a partial film forming method by photolithography using a photo-curing resist film. There is.

However, when a thermosetting resist is used, the film shrinkage rate of the resist film due to the thermosetting reaction during the heat curing of the thermosetting resist is large (10 to 1).
5%), and when a photocurable resist is used,
The heat shrinkage during the main curing process in the post-baking process is large.

The surface of the color filter layer has a large step at the boundary between the black matrix and the plurality of color filters, and the surface of the color filter layer has a large number of steps.

As described above, when the film shrinkage of the resist film for forming the protective film is large, even if the resist solution is applied or dried, even if the surface is flat, the heat treatment in the main curing step causes There is a problem that the flatness is impaired by the influence of the step of the color filter of the lower layer, and the display quality of the liquid crystal panel is deteriorated.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to maintain the flatness of the protective film formed to cover the color filter layer to prevent the deterioration of the display quality, and a manufacturing method thereof. To provide.

[0015]

In order to achieve the above object, in the present invention, photocurability (radical reactivity) is imparted to an epoxy resin type thermosetting resist, and the photocurable resist is made highly sensitive. As a result, the thermal curing shrinkage due to the baking treatment in the main curing step was reduced.

In addition to increasing the sensitivity of the resist, the exposure amount during the photo-curing treatment is increased or the addition amount of the cross-linking agent is increased to reduce the heat-curing shrinkage due to the baking treatment in the main curing step. Reduced.

That is, the first aspect of the present invention is such that a color filter layer of a plurality of colors divided by a black matrix of a light-absorbing substance formed on the surface of a transparent substrate and the color filter layer are covered. In a liquid crystal panel composed of a transparent electrode formed through a formed protective film and an alignment film formed so as to cover the transparent electrode, the protective film applied by filling the surface irregularities of the color filter layer is thermoset. It is characterized in that it is formed of a high-sensitivity photocurable thermosetting organic transparent resin which is highly cross-linked before.

In a second aspect of the present invention, a color filter layer of a plurality of colors is formed on the surface of the transparent substrate and is divided by a black matrix of a light-absorbing substance, and the color filter layer is covered. In a liquid crystal panel composed of a transparent electrode formed through a formed protective film and an alignment film formed so as to cover the transparent electrode, the protective film applied by filling the surface irregularities of the color filter layer is thermoset. It is characterized in that it is formed of a photocrosslinking reactive organic transparent resin which has been highly crosslinked before.

Further, a third invention according to a third aspect is characterized in that:
A color filter layer of a plurality of colors divided by a black matrix on the surface of the transparent substrate, a transparent electrode formed via a protective film formed to cover the color filter layer, and an alignment film formed to cover the transparent electrode. In the method for producing a liquid crystal panel composed of, a high-sensitivity photocurable thermosetting organic transparent resin is applied to cover the color filter layer, an exposure step of exposing and crosslinking reaction, and the exposure step And a baking step of heat-treating the cured color filter layer coated with the thermosetting organic transparent resin to cure the color filter layer.

[0020] Further, a fourth invention according to claim 4 is characterized in that:
A color filter layer of a plurality of colors divided by a black matrix on the surface of the transparent substrate, a transparent electrode formed via a protective film formed to cover the color filter layer, and an alignment film formed to cover the transparent electrode. In the method for producing a liquid crystal panel composed of, a high-sensitivity photocrosslinking-reactive organic transparent resin is applied to cover the color filter layer, and an overexposure step of accelerating the crosslinking reaction by performing exposure exceeding the appropriate exposure amount. And a baking step of heat-curing and curing the color filter layer coated with the photocrosslinking reactive organic transparent resin cured in the overexposure step.

According to the present invention, a skeleton due to cross-linking is formed in the protective film before the baking step which is the main curing, so that the heat shrinkage during the heat curing treatment is suppressed and the color is suppressed. Since the flatness of the protective film formed to cover the filter layer is maintained, it is possible to obtain a liquid crystal panel in which deterioration of display quality is prevented.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the illustrated embodiments.

FIG. 1 is a partial cross-sectional schematic view of a color filter substrate for explaining an embodiment of a liquid crystal panel according to the present invention. SUB2 is a glass substrate, BM is a black matrix, FIL (R) is a red filter, and FIG. FIL (G) is a green filter, FIL (B) is a blue filter, PSV2 is a protective film, ITO2 is a transparent electrode (common electrode), and ORI2 is an alignment film.

In the figure, the color filter substrate constituting the liquid crystal panel has a plurality of color filters FIL (R), FIL (G) and FIL (B) divided by a black matrix BM on a transparent glass substrate SUB2. Has been formed.

The color filters FIL (R), FIL
A protective film PSV2 is formed so as to cover (G) and FIL (B), and a transparent electrode ITO2 and an alignment film ORI2 are formed thereon.

As the protective film PSV2, an epoxy resin having radical reactivity is applied as a photocurable thermosetting organic resin having photosensitivity by filling the surface irregularities of the color filter layer and then exposed. A skeleton was formed by a photocrosslinking reaction, and then thermosetting was performed.

According to the present embodiment, the heat shrinkage during the baking treatment in the main curing step is reduced, and the protective film maintains the flatness during coating, thereby filling the irregularities of the color filter layer and forming the transparent electrode or the alignment on the upper layer. The film can be flattened.

Therefore, according to the liquid crystal display device using the liquid crystal panel of the present embodiment, high quality image display without deterioration of image quality can be obtained.

The second embodiment of the present invention is the above protective film PSV.
2, a photocrosslinking reactive organic transparent resin with high sensitivity was applied, and this was exposed to light to form a skeleton by a crosslinking reaction, and thermal contraction in the subsequent baking step was reduced.

According to this embodiment, the protective film maintains the flatness during coating, and the unevenness of the color filter layer can be filled up to flatten the transparent electrode and the alignment film formed in the upper layer, thereby deteriorating the image quality. No high quality image display is obtained.

The third embodiment of the present invention is based on the above-mentioned protective film PSV.
As No. 2, a photo-crosslinking reactive organic transparent resin was applied, and this was exposed at a double exposure amount higher than usual to form a skeleton by a cross-linking reaction, and thermal contraction in the subsequent baking step was reduced.

According to this embodiment, the protective film maintains the flatness at the time of coating, and the unevenness of the color filter layer can be filled up to flatten the transparent electrode and the alignment film formed in the upper layer, thereby deteriorating the image quality. No high quality image display is obtained.

FIG. 2 is an explanatory diagram of the relationship of the remaining film thickness of the protective film when the exposure amount is increased. The horizontal axis represents the multiple of the exposure amount (relative multiple) and the vertical axis represents the remaining film thickness (μm). ) Is shown.

In the figure, a indicates the residual film thickness after the resist is applied and prebaked, and b indicates the residual film thickness after the final baking treatment.

FIG. 3 is an explanatory view of the relationship of the residual film ratio of the protective film when the exposure amount is increased, wherein the horizontal axis represents the multiple of the exposure amount (relative multiple) and the vertical axis represents the residual film ratio. (%) Is shown.

In the figure, a indicates the residual film rate after the resist is applied and prebaked, and b indicates the residual film rate after the final baking treatment.

In FIG. 2 and FIG. 3, for example, when V259PA (manufactured by Nippon Steel Chemical Co., Ltd.) is used as a photocurable resist for photolithography and a film is formed with a conventional exposure amount, a film thickness of 2.57 μm at the time of prebaking is obtained. The final baking treatment resulted in 2.35 μm. In this case, the residual film rate is about 91%.

On the other hand, a resist was applied under the same conditions as described above, and the residual film thickness after exposure was 2.56 with an exposure amount twice that of the conventional case.
μm, the residual film thickness after the final baking treatment is 2.37 μm, and the residual film ratios are about 99.5% and 92.2%, respectively.

As described above, the shrinkage rate can be reduced to about 1% or more only by increasing the exposure amount.

In the above description, the example in which the exposure amount is increased has been described, but instead of this, the same effect can be obtained by increasing the photocurability of the resist or increasing the addition amount of the crosslinking agent.

4 and 5 are schematic process diagrams for explaining the first embodiment of the method for manufacturing a liquid crystal panel according to the present invention.

In FIGS. 4 and 5, first, the glass substrate S
A resist film BM 'of a black matrix material made of a photosensitive resist to which a light absorbing substance is added is applied to the surface of UB2 and dried (a).

This is exposed by exposing light EX through a mask MSK1 having a black matrix pattern opening, and the resist film BM 'in the exposed portion is cured (b).

The unexposed portion of the resist film BM 'is developed and removed to form a black matrix BM (c).

Next, a photosensitive resist film FIL (R) 'containing the first color filter material is applied to cover the black matrix BM and dried (d).

This is exposed by exposure light EX through the mask MSK2 having the first color filter pattern to cure the resist film FIL (R) 'in the exposed portion (e).

The resist film FIL (R) 'is removed by development to form a first color filter FIL (R) (f).

Thereafter, the second color filter F is similarly processed.
A color filter layer composed of IL (G) and the third color filter FIL (B) is formed (g).

A resist film P of a photocurable thermosetting organic transparent resin which covers the formed color filter layer and serves as a protective film.
SV2 'is applied and dried (h).

The resist film PSV2 'is irradiated with exposure light EX to be photocured. At this time, the resist film PSV2 'is crosslinked by a photoreaction to form a molecular skeleton in the film (i).

Due to the formation of this skeleton, the shrinkage of the protective film PSV2 is reduced in the final baking treatment in the latter stage.

After forming the color filter layer, the transparent electrode ITO2 is formed thereon (j), and the alignment film ORI2 is further formed thereon (k).

The color filter substrate is manufactured in this manner, and the other substrate, which is separately manufactured, is bonded to the substrate through the liquid crystal layer, whereby a liquid crystal panel is obtained.

Although only the color filter substrate has been described above, the same applies to a protective film formed on the other substrate (individual electrode side substrate or TFT substrate side).

Next, a specific example of a liquid crystal display device using the liquid crystal panel according to the present invention will be described.

FIG. 6 is a cross-sectional view showing in detail a main structure of a TFT type liquid crystal display device as an example of the liquid crystal display device to which the present invention is applied, wherein SUB1 is a lower substrate and SUB2.
Is an upper substrate, ITO1, 0TO2 are electrodes, TFT1 is a thin film transistor, FIL (FIL (R), FIL
(G) and FIL (B)) are color filters, BM is a black matrix (light shielding film), PSV1 and PSV2 are protective films, ORI1 and ORI2 are alignment films, LC is a liquid crystal layer, and PO.
L1 and POL2 are polarizing plates, and PUL is a birefringent medium.

SIO is a silicon oxide film, SD1
(D3, d2, d0), SD2 (d3, d2), AO
F, GT, g2, AS, GI and the like are various electrodes and insulating films that constitute the TFT, and other functional thin films.

In the figure, a thin film transistor TFT and a transparent pixel electrode ITO1 are formed on the lower substrate SUB1 side with respect to the liquid crystal layer LC, and a lower alignment film ORI1 is formed via a protective film PSV1.

A color filter FIL and a light-shielding black matrix pattern BM are formed on the upper substrate SUB2 side.

On both surfaces of the upper and lower substrates SUB1 and SUB2, a silicon oxide film SI formed by dip processing or the like is formed.
O is provided.

Inside the upper substrate SUB2 (on the liquid crystal layer LC side)
A light shielding film BM, a color filter FIL, a protective film PSV2, a common transparent pixel electrode ITO2 (COM), and an upper alignment film ORI2 are sequentially laminated on the surface of the.

On the inner surface of the lower substrate SUB1, a thin film transistor TFT1, a pixel electrode ITO1 and a protective film PSV are provided.
1, a lower alignment film ORI1 is formed.

Then, the upper substrate SUB2 and the upper polarizing plate P
A film of triacetyl cellulose is inserted as a birefringent medium PUL between the film and OL1.

FIG. 7 is a developed perspective view illustrating a structural example of a TFT type liquid crystal display module assembled by using the liquid crystal display device according to the present invention.

In the figure, MDL is a liquid crystal display module, SHD is a metal shield case that is an upper frame, WD is a display window that defines the effective screen of the liquid crystal display module, PNL is a liquid crystal panel consisting of liquid crystal display elements, and PC.
B1 is a drain side circuit board, PCB2 is a gate side circuit board, PCB3 is an interface circuit board, PRS is a prism sheet, SPS is a diffusion sheet, GLB is a light guide,
RFS is a reflection sheet, BL is a backlight, LP is a cold cathode fluorescent lamp constituting a lamp of the backlight BL, LS is a reflection sheet, GC is a rubber bush, LPC is a lamp cable, and MCA is an opening for installing a light guide GLB. A lower case having an MO, JN1,2,3 are joiners connecting circuit boards, TCP1,2 are tape carrier packages,
INS 1, 2 and 3 are insulating sheets, GC is a rubber cushion, BAT is a double-sided adhesive tape, and ILS is a light-shielding spacer.

The above-mentioned components are laminated between the metal shield case SHD and the lower case MCA and sandwiched and fixed to form the liquid crystal display module MDL.

As shown in FIG. 13, the birefringent medium according to the present invention is laminated on the liquid crystal panel PNL, and various circuit boards are attached to the periphery of the birefringent medium for driving for image display.

On the back surface of the liquid crystal panel PNL, there is provided a backlight BL in which various optical sheets are laminated on the light guide body GLB, and the image formed on the liquid crystal display panel PNL is illuminated and displayed on the display window WD. indicate.

FIG. 8 is a block diagram showing a TFT liquid crystal display panel of an active matrix type TFT liquid crystal display module using a thin film transistor as a switching element and a circuit arranged in the outer peripheral portion thereof.

In the figure, the drain drivers IC _{1 to} IC _M and the gate drivers IC _{1 to} IC _N respectively arranged on only one side of the liquid crystal display panel are formed on one transparent insulating substrate SUB1 of the liquid crystal display element. Chip-on-glass mounting (COG mounting) is performed with the drain-side lead line and the gate-side lead line and an anisotropic conductive film, an ultraviolet curable resin SIL, or the like.

This liquid crystal display element has an XGA specification of 80.
It is applied to a liquid crystal display device having 0 × 3 × 600 effective dots. Therefore, on the transparent insulating substrate of the liquid crystal display element, 10 drain driver ICs _{1 to} IC _M having 240 outputs (M = 10) are provided on the long side of the liquid crystal panel, and 10 drain drivers IC _{1 to} IC _M are provided on the short side.
Six 1-output gate driver IC _{1 to} IC _N (N =
6) and are COG mounted.

From the number of pixels, the gate driver ICs _{1 to} I
A total of 600 outputs of C _N are sufficient, but since the additional gate lines are formed above and below the effective pixel portion, the uppermost 10
It has one output, 100 outputs in the central part × 4, and 101 outputs in the lowermost part.

In addition, with the same gate driver IC, 1
It is possible to properly use the 00 and 101 outputs.

As described above, the drain driver section 103 is arranged on the upper side of the liquid crystal display panel, the gate driver section 104 is arranged on the side surface section, and the controller section 101 and the power supply section 102 are arranged on the other side surface section. Has been done.

Controller section 101 and power supply section 10
2, drain driver unit 103, gate driver unit 10
4 are electrical connection means (joiner) JN1,
Interconnected by JN3.

In this constitution, 80 XGA panels are used.
0.times.3.times.600 dots 10.4 inch screen size T
An FT liquid crystal display module was designed. Therefore, the size of each dot of red (R), green (G), and blue (B) is 2
The size is 64 μm (gate line pitch) × 88 μm (drain line pitch), and one pixel is a combination of three dots of red (R), green (G), and blue (B), and is 264 μm.
It is m square. For this reason, if the drain lead wire DTM is 800 × 3, the lead wire pitch is 1
This is less than 00 μm, which is less than the connection pitch limit of currently available tape carrier package (TCP) mounting. In COG mounting, depending on the material such as the anisotropic conductive film used, the pitch of the bumps BUMP of the driving IC chip is about 70 μm and the crossing area with the underlying wiring is about 40 μm square. It can be called a value.
Therefore, in this example, the drain driver ICs are arranged in a line on one long side of the liquid crystal panel, the drain lines are drawn out to the long side, and the pitch of the drain line lead-out wiring DTM is set to 88 μm.

Therefore, the bump pitch of the driving IC chip is about 70 μm and the area of intersection with the underlying wiring is about 40 μm.
It was possible to design in μm square, and it became possible to connect with the underlying wiring with higher reliability.

Since the gate line pitch is sufficiently large at 264 μm, the gate line is drawn out on the short side on one side. However, when the resolution is further increased, two short sides on the opposite side are formed in the same manner as the drain line. It is also possible to lead out the gate line lead lines alternately.

FIG. 9 is an explanatory diagram showing the flow of display data and clock signals for the gate driver 104 and the drain driver 103 in the TFT liquid crystal display module shown in FIG.

The display control device 101 receives a control signal (clock, display timing signal, synchronizing signal) from the main computer (host) and, as a control signal to the drain driver 103, a clock D1 (CL1) and a shift clock D2. (CL2) and display data are generated, and at the same time, a frame start instruction signal, a clock, and display data are generated as control signals to the gate driver 104.

The carry output of the previous stage of the drain driver 103 is the same as that of the drain driver 103 of the next stage.
Is input to the carry input of.

FIG. 10 is an explanatory diagram of the common voltage applied to the electrode (common electrode) on the upper substrate, the drain voltage applied to the drain, the level of the gate voltage applied to the gate electrode, and the waveform thereof.

The drain waveform shows the drain waveform when black is displayed.

In the figure, the gate-on level waveform (DC) and the gate-off level waveform change in level between -9 and -14 volts, and the gate is turned on at 10 volts. The drain waveform (when displayed in black) and the common voltage Vcom waveform are 0
Level changes between ~ 3 volts.

For example, in order to change the black level drain waveform every horizontal period (1H), the logic processing circuit inverts the logic one bit at a time and inputs it to the drain driver.

The off-level waveform of the gate is the common voltage V
It operates with substantially the same amplitude and phase as the com waveform.

FIG. 11 is a perspective view of a notebook type personal computer or word processor as an example of electronic equipment in which the liquid crystal display device according to the present invention is mounted.

In the figure, the liquid crystal panel PN of the drive IC
By adopting COG mounting on L and bending mounting on the multilayer flexible substrate as a peripheral circuit for the drain and gate drivers in the outer peripheral portion, the external size can be significantly reduced compared to the conventional case.

In this example, since the drain driver peripheral circuit mounted on one side can be disposed above the display section above the hinge of the information device, compact mounting is possible.

The signal from the information equipment first goes to the display control integrated circuit element (TCON) from the connector located at the substantially center of the interface board PCB on the left side of FIG.
The display data converted here flows to the drain driver peripheral circuit.

As described above, by using the flip chip system and the multilayer flexible substrate, the restriction of the outer shape of the width of the information equipment can be eliminated, and the small and low power consumption information equipment can be provided.

Although the present invention has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the scope of the invention. is there.

[0093]

As described above, according to the present invention,
After forming a skeleton on the protective film by increasing the degree of cross-linking of the resist forming the protective film formed on the color filter substrate, heat treatment can be performed to suppress heat shrinkage and ensure surface flatness, thus providing high quality. It is possible to provide a liquid crystal panel capable of displaying an image.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional view of a color filter substrate for explaining an embodiment of a liquid crystal panel according to the present invention.

FIG. 2 is an explanatory diagram of a relationship of a residual film thickness of a protective film when an exposure amount is increased.

FIG. 3 is an explanatory diagram of a relationship of a residual film rate of a protective film when an exposure amount is increased.

FIG. 4 is a schematic process diagram illustrating a first embodiment of a method for manufacturing a liquid crystal panel according to the present invention.

FIG. 5 is a schematic process diagram following FIG. 4 for explaining the first embodiment of the method for manufacturing a liquid crystal panel according to the present invention.

FIG. 6 is a cross-sectional view illustrating in detail a main part structure of a TFT type liquid crystal display device as an example of a liquid crystal display device to which the present invention is applied.

FIG. 7 is an exploded perspective view illustrating a structural example of a TFT type liquid crystal display module assembled using the liquid crystal display device according to the present invention.

FIG. 8 is a block diagram showing a TFT liquid crystal display panel of an active matrix type TFT liquid crystal display module using a thin film transistor as a switching element and a circuit arranged on an outer peripheral portion thereof.

9 is an explanatory diagram showing the flow of display data and clock signals for the gate driver 104 and the drain driver 103 in the TFT liquid crystal display module shown in FIG.

FIG. 10 is an explanatory diagram of a common voltage applied to an electrode (common electrode) of an upper substrate, a drain voltage applied to a drain, a level of a gate voltage applied to a gate electrode, and a waveform thereof.

FIG. 11 is a perspective view of a notebook-type personal computer or word processor as an example of an electronic apparatus in which the liquid crystal display device according to the present invention is mounted.

[Explanation of symbols]

 SUB2 Glass substrate BM Black matrix FIL (R) Red filter FIL (G) Green filter FIL (B) Blue filter PSV2 Protective film ITO2 Transparent electrode (common electrode) ORI2 Alignment film.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinori Imabayashi 3300 Hayano, Mobara-shi, Chiba Hitachi, Ltd. Electronic Devices Division

Claims (4)

[Claims] 1. A color filter layer of a plurality of colors divided by a black matrix of a light-absorbing substance formed on the surface of a transparent substrate, and a transparent electrode formed through a protective film formed so as to cover the color filter layer. A liquid crystal panel comprising an alignment film formed so as to cover the transparent electrode, wherein the protective film applied by filling in the surface irregularities of the color filter layer is a photocurable thermosetting resin that is highly cross-linked before thermosetting. A liquid crystal panel characterized by being formed of a transparent organic transparent resin. 2. A color filter layer of a plurality of colors divided by a black matrix of a light-absorbing substance formed on the surface of a transparent substrate, and a transparent electrode formed through a protective film formed so as to cover the color filter layer. A liquid crystal panel comprising an alignment film formed so as to cover the transparent electrode, wherein the protective film applied by filling in the surface irregularities of the color filter layer is a photocrosslinking reactive organic transparent material that is highly crosslinked before thermosetting. A liquid crystal panel made of resin. 3. A color filter layer of a plurality of colors divided by a black matrix on the surface of a transparent substrate, a transparent electrode formed through a protective film formed to cover the color filter layer, and a transparent electrode covering the transparent electrode. In the method for producing a liquid crystal panel composed of an alignment film formed as above, an exposure step of covering the color filter layer with a high-sensitivity photocurable thermosetting organic transparent resin, exposing the mixture to a crosslinking reaction, and And a baking step of heat-treating the color filter layer coated with the thermosetting organic transparent resin cured in the exposure step to cure the color filter layer. 4. A color filter layer of a plurality of colors partitioned by a black matrix on the surface of a transparent substrate, a transparent electrode formed through a protective film formed to cover the color filter layer, and a transparent electrode covering the transparent electrode. In the method for producing a liquid crystal panel composed of an alignment film formed by the above method, a high-sensitivity photocrosslinking-reactive organic transparent resin is applied to cover the color filter layer, and a crosslinking reaction is performed by performing an exposure exceeding an appropriate exposure amount. An overexposure step for promoting, and a liquid crystal panel characterized by comprising at least a baking step of heat-curing and curing the color filter layer coated with the photocrosslinking reactive organic transparent resin cured in the overexposure step. Production method.