WO2017171269A1

WO2017171269A1 - Flexible color filter integrated with touch sensor, and flexible liquid crystal display and manufacturing method therefor

Info

Publication number: WO2017171269A1
Application number: PCT/KR2017/002714
Authority: WO
Inventors: 윤억근; 윤주인; 박용수; 최용석
Original assignee: 동우화인켐 주식회사
Priority date: 2016-03-31
Filing date: 2017-03-14
Publication date: 2017-10-05
Also published as: CN108885364B; TWI724145B; KR102543630B1; TW201741696A; KR20170112582A; CN108885364A

Abstract

The present invention relates to a flexible color filter integrated with a touch sensor, and a flexible liquid crystal display integrated with a touch sensor, a color filter and a thin film transistor array, and a manufacturing method therefor. The present invention has an advantage in that since a color filter integrated with a thin film transistor array or a touch sensor on a glass substrate is formed, it is possible to manufacture a reliable product, i.e. a thin film transistor array, a flexible color filter integrated with a touch sensor, a flexible liquid crystal display integrated with a touch sensor, a color filter and a thin film transistor array, without the risk of deformation of a base material necessary for the formation of a semiconductor layer even when a high temperature process is applied for the formation of the semiconductor layer.

Description

Flexible color filter with integrated touch sensor, flexible liquid crystal display, and manufacturing method thereof

The present invention relates to a flexible liquid crystal display, and more particularly, to a flexible color filter in which a touch sensor is integrated, a flexible liquid crystal display in which a touch sensor, a color filter, and a thin film transistor array are integrated, and a method of manufacturing the same.

While the touch input method has been spotlighted as the next generation input method, attempts have been made to introduce touch input methods to various electronic devices. Accordingly, active research and development on touch sensors that can be applied to various environments and enable accurate touch recognition are made. ought.

For example, in the case of an electronic device having a touch type display, an ultra-thin flexible display that achieves ultra-light weight, low power and improved portability has been attracting attention as a next-generation display, and development of a touch sensor applicable to such a display has been required. Flexible (flexible) display means a display fabricated on a flexible substrate that can bend, bend or roll without loss of properties, and technologies are being developed in the form of flexible LCDs, flexible OLEDs, and electronic paper.

As an example of a flexible LCD, an application invention related to "a method of manufacturing a flexible color filter and a flexible color display device" is disclosed in Korean Patent Laid-Open No. 10-2014-0126681.

The invention disclosed in Korean Patent Application Laid-Open No. 10-2014-0126681 provides a bonding substrate comprising a rigid support substrate and a carrier removing adhesive layer disposed on the support substrate, and providing a flexible substrate on the carrier removing adhesive layer. Bonding, forming a color filter layer on the flexible substrate to form a color filter module, and separating the flexible substrate from the support substrate by placing the color filter module at -20 ° C to 20 ° C for 3 to 40 minutes. To perform a cooling process to produce a flexible color filter.

That is, the exemplified application publication is a technique of manufacturing a flexible color filter in a film form by adhering a film layer, such as a flexible substrate, onto a substrate to form a color filter layer, and then peeling the film layer through a cooling process.

However, since the process of adhering a film layer, such as a flexible substrate, on a rigid substrate must be accompanied, there is a disadvantage that the production yield by the film bonding process is lower than other processes, and the high temperature in forming a color filter on the film layer When the process is applied, the film layer may be deformed to deteriorate the performance of the display device.

[Preceding technical literature]

[Patent Documents]

Republic of Korea Patent Application Publication No. 10-2014-0126681

Accordingly, the present invention has been made to solve the above-mentioned problems, and a main object of the present invention is a flexible color filter in which a touch sensor is integrated without using a film layer, a flexible liquid crystal display including the same, and a manufacturing thereof. In providing a way,

Furthermore, another object of the present invention is to provide a flexible color filter and a flexible liquid crystal display including the same, in which a touch sensor is integrated, which can improve production yield compared to a conventional method of manufacturing a color filter by adhering a film layer on a substrate. In providing.

In addition, the present invention provides a highly reliable flexible liquid crystal display device without deformation of the product components even in the high temperature process of the manufacturing process, and provides a flexible liquid crystal display device and a method of manufacturing the integrated touch sensor and color filter, as well as touch Another object of the present invention is to provide a flexible liquid crystal display and a method of manufacturing the same, in which a sensor, a color filter, and a thin film transistor array are integrated.

In order to solve the above technical problem, a method of manufacturing a flexible color filter integrated with a touch sensor according to an embodiment of the present invention,

Forming a separation layer on the substrate;

Forming an electrode pattern layer constituting a touch sensor on the separation layer;

Forming a protective layer on the electrode pattern layer;

Forming a planarization layer on the protective layer to prevent color shift of the color filter;

Forming a color filter array on the planarization layer;

Bonding a protective film coated on one surface of an adhesive layer onto the color filter array;

Separating the substrate from the separation layer;

It characterized in that it comprises the step of adhering the substrate film on one surface of the separation layer separated from the substrate.

The flexible color filter integrated with the touch sensor according to the embodiment of the present invention,

A separation layer formed on the base film,

An electrode pattern layer formed on the separation layer to implement a touch sensor;

A protective layer formed on the electrode pattern layer;

A planarization layer formed on the protective layer to prevent color distortion of the color filter;

A color filter array formed on the planarization layer;

It characterized in that it comprises a protective film bonded on the color filter array.

Furthermore, a method of manufacturing a flexible liquid crystal display according to another embodiment of the present invention,

Forming an alignment layer on the color filter array of the flexible color filter array module in which the touch sensor and the color filter array are integrally formed on the first substrate film;

Forming an alignment layer and a liquid crystal layer on the thin film transistor array of the thin film transistor array module having a first separation layer and a capping layer formed on the substrate layer, and a thin film transistor array formed on the capping layer;

Bonding the flexible color filter array module and the thin film transistor array module to face the liquid crystal layer formed on the thin film transistor array module and the color filter array formed on the flexible color filter array module. do.

In another embodiment, a flexible liquid crystal display device is provided.

A flexible color filter array module in which a touch sensor and a color filter array are integrally formed on a first substrate film;

A thin film transistor array module having a first separation layer and a capping layer formed on the substrate layer, and a thin film transistor array formed on the capping layer;

The flexible color filter array module and the thin film transistor array module are bonded to each other so that the thin film transistor array and the color filter array formed on the flexible color filter array module face each other, and a liquid crystal layer formed on the bonding surface. Features,

The flexible color filter array module,

A second separation layer formed on the first base film;

An electrode pattern layer formed on the second separation layer to implement a touch sensor;

A first protective layer formed on the electrode pattern layer;

A planarization layer formed on the first protective layer to prevent color shift of the color filter;

A color filter array formed on the planarization layer;

It is another feature that an alignment film formed on the color filter array.

According to the above-described problem solving means, since the flexible color filter integrated with the touch sensor according to the embodiment of the present invention is formed on a glass substrate without using a film layer, even if a high temperature process is applied, the base material for forming the touch sensor and color filter (That is, there is no fear of deformation of the illustrated prior art film layer), there is an advantage that can produce a reliable product, that is, a flexible color filter in which the touch sensor is integrated,

In addition, since the present invention does not use a separate film layer for forming the touch sensor and the color filter, there is also an advantage that can improve the production yield compared to the disclosed invention exemplified in the prior art literature.

Furthermore, the present invention provides a flexible liquid crystal display device including a flexible color filter array and a thin film transistor array without deformation of product components even at a high temperature process in a manufacturing process, but using a flexible liquid crystal display device in which a touch sensor is integrated together. It is a useful invention that can be produced.

1 is an exemplary cross-sectional view of a flexible color filter incorporating a touch sensor according to an exemplary embodiment of the present invention.

2 is a view for explaining the effect of the step difference caused by the electrode pattern constituting the touch sensor when forming the color filter array on the protective layer.

3 is a flow chart illustrating a manufacturing process of the flexible color filter integrated with a touch sensor according to an embodiment of the present invention.

4 and 5 are cross-sectional view illustrating the manufacturing process of the flexible color filter according to an embodiment of the present invention.

6 is an enlarged partial view of a flexible color filter according to an embodiment of the present invention.

7 is a cross-sectional view illustrating a flexible color filter array module (a) and a thin film transistor array module (b) constituting a flexible liquid crystal display device according to an exemplary embodiment of the present invention.

FIG. 8 is a view illustrating a bonding state of a flexible liquid crystal display device manufactured by bonding the flexible color filter array module and the thin film transistor array module shown in FIG. 7.

9 is a flow chart illustrating a manufacturing process of a thin film transistor array module according to an embodiment of the present invention.

10 and 11 are cross-sectional views illustrating intermediate products of manufacturing processes of a thin film transistor array module according to an exemplary embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the inventive concept disclosed herein are provided only for the purpose of describing the embodiments according to the inventive concept. It may be embodied in various forms and is not limited to the embodiments described herein.

In addition, the embodiments according to the concept of the present invention may be various modifications and may have various forms will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the invention to the specific forms disclosed, it includes all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In addition, in describing the embodiments of the present invention, when it is determined that a detailed description such as a known function or configuration (for example, the shape of the electrode pattern, the method of forming the electrode pattern, etc.) may unnecessarily obscure the gist of the present invention, Detailed description thereof will be omitted.

Integrated touch sensor Flexible Color filter and manufacturing method thereof Example

First, FIG. 1 illustrates a cross-sectional structure of a flexible color filter incorporating a touch sensor according to an exemplary embodiment of the present invention.

As shown in FIG. 1, the flexible color filter integrated with the touch sensor according to the exemplary embodiment of the present invention forms a separation layer on a glass substrate without using a film layer to prevent deformation of the film layer by a high temperature process. After forming the touch sensor and the color filter array in sequence it is characterized in that the manufacturing method by adhering the base film (100).

That is, the flexible color filter integrated with the touch sensor according to the embodiment of the present invention, as shown in Figure 1,

Separation layer 120 formed on the base film 100,

Electrode pattern layers 131, 132, 133, and 135 formed on the separation layer 120 to implement a touch sensor TS;

A protective layer 140 formed on the electrode pattern layers 131, 132, 133, and 135;

A planarization layer 150 formed on the protective layer 140 to prevent color shift of the color filter;

Color filter arrays CF, 160 and 170 formed on the planarization layer 150,

It characterized in that it comprises a protective film (not shown) bonded on the color filter array (CF, 160, 170).

As is known, an electrode pattern layer for constructing or implementing a touch sensor includes a first electrode pattern 131 arranged in a first direction (for example, the x-axis direction) and a second direction (for example, the y-axis direction). The bridge electrode for connecting the second electrode pattern 132 arranged in the shape, the insulating layer 133 to insulate the first and

second electrode patterns

131 and 132, and the first electrode pattern 131 spaced apart from each other. Pattern 135. Thus, for convenience of explanation, it is assumed that the electrode pattern layers include the first and

second electrode patterns

131 and 132, the insulating layer 133, and the bridge electrode pattern 135. In FIG. 1, reference numeral 110 represents an adhesive applied to one surface of the base film 100.

The color filter layer constituting the color filter array is denoted by reference numeral 160, and reference numeral 170 denotes an ITO common electrode constituting the color filter array.

As a deformable embodiment, in the flexible color filter integrated with the touch sensor according to the embodiment of the present invention, a protective layer may be further formed between the separation layer 120 and the electrode pattern layers 131, 132, 133, and 135. Although not shown in FIG. 1, the protective layer is illustrated using the reference numeral 125 in FIG. 4.

If the color filter array CF is directly formed on the protective layer 140 constituting the touch sensor, color distortion may occur due to pixel deformation of the color filter due to a step generated by an electrode pattern constituting the touch sensor. have. In order to prevent this, it is preferable to form one or more planarization layers 150 on the protective layer 140.

The thickness of the planarization layer 150 is preferably 2 μm or more, and the planarization layer 150 may be formed of an organic insulating material. In addition, when the surface level (roughness) thickness of the planarization layer 150 is 0.1 μm or less, color distortion of the color filter may be prevented.

For reference, (a) of FIG. 2 illustrates a screen visually recognized as a stain due to color shift due to the surface leveler step difference when the surface step thickness is 0.1 μm or more, and FIG. The graph comparing the characteristics of the panel is illustrated.

Based on the experimental characteristics, when the surface step thickness is 0.1 μm or less, color distortion of the color filter can be prevented normally, so that the surface step thickness is preferably 0.1 μm or less.

데이터data	얼룩부 높이(㎛)Spot height (㎛)	정상부(㎛)Top part (㎛)	얼룩부 높이편차(㎛)Spot height deviation (㎛)	얼룩결과Speckle
No1No1	4.1174.117	3.6473.647	0.4700.470	강수준 NGStrong NG
No2No2	3.7953.795	3.7003.700	0.0950.095	미시인 OKMissy OK

Hereinafter, a method of manufacturing a flexible color filter in which a touch sensor that can be manufactured without using a film layer will be described in more detail with reference to FIGS. 3 to 5.

3 is a flow chart illustrating a manufacturing process of a flexible color filter integrated with a touch sensor according to an embodiment of the present invention, and FIGS. 4 and 5 are cross-sectional views of manufacturing processes of a flexible color filter integrated with a touch sensor according to an embodiment of the present invention. 6 illustrates a partial enlarged view of a flexible color filter in which a touch sensor according to an exemplary embodiment of the present invention is integrated.

Referring to FIG. 3, first, a polymer organic film is coated on a glass substrate, which is a carrier substrate, to form a separation layer 120 as illustrated in FIG. 4A (S10).

The separation layer 120 is a layer formed to separate the touch sensor TS and the color filter array CF from the glass substrate to be formed on the glass substrate, and the separation layer 120 is formed on the electrode pattern layers 131, 132, 133, and 135. ) To cover and insulate it. For reference, a method of applying the separation layer may use a known coating method such as spin coating, die coating, spray coating, or the like.

The peel force of the separation layer 120 is not particularly limited, but may be, for example, 0.01 to 1 N / 25 mm, and preferably 0.01 to 0.2 N / 25 mm. When the above range is satisfied, the separation layer 120 may be easily peeled off from the glass substrate in the manufacturing process, and curls and cracks due to tension generated during peeling may be reduced.

The thickness of the separation layer 120 is not particularly limited, but may be, for example, 10 to 1,000 nm, preferably 50 to 500 nm. When the said range is satisfied, peeling force is stable and a uniform pattern can be formed.

The material of the separation layer 120 is a polyimide polymer, a polyvinyl alcohol polymer, a polyamic acid polymer, a polyamide polymer, a polyethylene polymer, a polystyrene polymer, a polynorbornene polymer, a phenylmaleimide copolymer (phenylmaleimide It may be made of a polymer such as a copolymer-based polymer, polyazobenzene-based polymer, it can be used alone or mixed two or more kinds.

The curing process for forming the separation layer 120 may be used alone or in combination with thermosetting or UV curing, thermosetting and UV curing in combination.

After the separation layer forming step (step S10), as shown in FIG. 4B, a protective layer 125 (which may be referred to as a first protective layer) may be further formed on the separation layer 120. This protective layer 125 is an optional component that can be omitted as needed. The protective layer 125 covers and protects the electrode pattern layers 131, 132, 133, and 135, which will be described later, together with the separation layer 120. The protective layer 125 may be formed to cover at least a portion of the side surface (edge sidewall) of the separation layer 120. In terms of completely blocking side exposure of the separation layer 120, the protective layer 125 is preferably configured to cover all of the side surfaces of the separation layer 120.

In the electrode pattern layer forming step (S30), a process of forming the electrode pattern layers 131, 132, 133, and 135 on the protective layer 125 or the separation layer 120 is performed.

As described above, the electrode pattern layers 131, 132, 133, and 135 are components for detecting a touch signal input by a user, that is, a first electrode pattern 131 for detecting x coordinates, and a second electrode pattern 132 for detecting y coordinates. ), A bridge electrode pattern 135 for connecting the second electrode pattern 132, and an insulating layer 133 for insulating the electrode pattern and the bridge electrode pattern 135. Since the process of forming the electrode pattern layers 131, 132, 133, and 135 and the forming materials are already known, the following descriptions will be omitted. In FIGS. 4C, 4D, and 1E, the first and second layers may be formed on the protective layer 125. A cross-sectional structure for each manufacturing process is illustrated in which electrode

patterns

131 and 132 are formed, insulating layers 133 are formed on the first and

second electrode patterns

131 and 132, and bridge electrode patterns 135 are formed on the insulating layer 133. It was. For reference, the thickness and the number of layers of the electrode pattern layers 131, 132, 133, and 135 are not particularly limited, but are preferably thin films in consideration of flexibility of the touch sensor.

When the electrode pattern layers 131, 132, 133, and 135 are formed, a protective layer 140 (also referred to as a second protective layer) is formed to cover the electrode pattern layers 131, 132, 133, and 135 as illustrated in FIG. 5F (S40). do. The passivation layer 140 may be formed to have a flat surface on the opposite side of the contact surface of the electrode pattern layers 131, 132, 133, and 135. The passivation layer 140 may be formed of a single layer or a plurality of layers or more. It is preferable to form a material or material having the same refractive index as the layer 133.

Thereafter, as shown in FIG. 5G, the planarization layer 150 is formed on the passivation layer 150 (S50). As described above, the planarization layer 150 is formed to prevent color distortion due to pixel deformation of the color filter due to the step generated by the electrode pattern. The thickness of the planarization layer 150 is preferably 2 μm or more, and the material for forming the planarization layer 150 is preferably formed of an organic insulating material.

Referring to FIGS. 6A and 6B, when the planarization layer 150 is formed as in (b), the pixel of the color filter may be caused by the generation of the step S due to the electrode pattern of the touch sensor. Since there is no deformation, color shifting can be prevented.

When one or more planarization layers 150 are formed, a color filter array CF is formed on the planarization layer 150 as illustrated in FIG. 5H (S60).

The color filter array CF may include a light blocking layer, color filter (R, G, and B) layers 160, and an ITO common electrode 170. The light blocking layers are spaced apart from each other to form a matrix, which is referred to as a black matrix layer. The color filter (R, G, B) layer 160 is formed between the light blocking layers, and the ITO common electrode 170 is formed again on the color filter (R, G, B) layer 160.

As described above, when the color filter array CF is formed on the planarization layer 150, the protective film coated on one surface of the adhesive layer is then bonded onto the color filter array CF through a transfer process (step S70). do.

When the bonding of the protective film is completed, the glass substrate is separated from the separation layer 120 (S80 step). That is, the separation layer 120 in which the touch sensor and the color filter are integrated may be separated from the glass substrate by using a method of peeling. The peeling method may include a lift-off or peel-off method, but is not limited thereto.

Then, the base film 100 coated with the adhesive 110 is applied to one surface of the separation layer 120 separated from the glass substrate (step S90), and the protective film bonded on the color filter array CF is removed (step S100). In this case, the flexible color filter in which the touch sensor having the cross-sectional structure as shown in FIG. 1 is integrated can be manufactured.

Since the flexible color filter manufactured according to the above-described manufacturing process is formed on a glass substrate without using a film layer, even if a high temperature process is applied, the base material for forming the touch sensor and the color filter (that is, There is no fear of deformation of the film layer) and thus a reliable product, that is, a flexible color filter in which a touch sensor is integrated can be manufactured.

Meanwhile, from a manufacturer's point of view, a separation layer is formed on a glass substrate according to a sales policy, an electrode pattern layer constituting a touch sensor is formed on the separation layer, and a protective layer is formed on the electrode pattern layer. In addition, a flattening layer for preventing color distortion of the color filter, and a flexible color filter in which a protective film is bonded on the color filter array after forming a color filter array on the flattening layer may be sold. The planarization layer of the flexible color filter having such a structure is also formed of an organic insulating material, and the thickness of the planarization layer is preferably 2 µm or more and the surface step is 0.1 µm or less.

Hereinafter, a flexible liquid crystal display using a flexible color filter in which a touch sensor that can be manufactured by the manufacturing method described above is integrated and a method of manufacturing the liquid crystal display will be described. More specifically, a flexible color in which the touch sensor is integrated A flexible liquid crystal display device integrating a filter and a thin film transistor array and a manufacturing method thereof will be described.

In the following exemplary embodiment, a method of manufacturing the flexible color filter integrated with the touch sensor described with reference to FIG. 3 will be omitted in order to avoid redundant description, and the flexible color filter integrated with the touch sensor manufactured by FIG. 3 may be referred to as "flexible". The thin film transistor array bonded to the flexible color filter array module "CFAM" and the thin film transistor array module "TFTAM" will be described.

Integrated touch sensor Flexible Color filter array module ( CFAM ) And thin film transistor array module TFTAM ) Is integrated Flexible Embodiment of a liquid crystal display and a method of manufacturing the same

First, FIG. 7 is a cross-sectional structural view of a flexible color filter array module (CFAM) (a) and a thin film transistor array module (TFTAM) (b) constituting a flexible liquid crystal display according to an exemplary embodiment of the present invention. The bonding state of the flexible liquid crystal display manufactured by the bonding of the flexible color filter array module TFTAM and the thin film transistor array module CFAM shown in FIG.

As a result of the flexible liquid crystal display in which the flexible color filter array module TFTAM and the thin film transistor array module CFAM are integrated according to an embodiment of the present invention, as shown in FIG.

A flexible color filter array module CFAM in which the touch sensor TS and the color filter array CF are integrally formed on the first substrate film 100;

A first separation layer 220 and a capping layer 240 are formed on the base film 200 (which may be a non-flexible substrate as a modified embodiment), and a thin film transistor array (TFT) is formed on the capping layer 240. A thin film transistor array module (TFTAM) having 250 formed thereon,

The flexible color filter array module CFAM and the thin film transistor array module TFTAM face the thin film transistor array TFT 250 and the color filter array CF formed in the flexible color filter array module CFAM. It is bonded, but includes a liquid crystal layer 270 formed on the bonding surface.

As shown in FIG. 7B, the protective layer 230 is disposed between the first separation layer 220 and the capping layer 240 on the second substrate film 200 constituting the thin film transistor array module TFTAM. ) May be further formed. Of course, a protective layer may be further formed between the separation layer 120 formed on the first substrate film 100 constituting the flexible color filter array module CFAM and the electrode pattern layer constituting the touch sensor TS.

Since the method of manufacturing the flexible color filter array module CFAM shown in FIG. 7A has already been described with reference to FIG. 3, it will be omitted below. However, in order to manufacture the flexible liquid crystal display using the flexible color filter array module (CFAM) manufactured by the method described with reference to FIG. In order to prevent distortion of the liquid crystal present, as shown in FIG. 7A, an alignment layer is formed 180 on the color filter array CF, and the alignment layer 180 is formed later by giving an alignment to the alignment layer 180 by an exposure process. It is preferable to arrange the liquid crystal layer 270 in a predetermined direction.

For convenience of description, FIG. 7A illustrates a state in which an alignment layer 180 is formed on a flexible color filter array module CFAM, and FIG. 7B illustrates an alignment layer on a thin film transistor array module TFTAM. It shows to the state in which the 260 and the liquid crystal layer 270 are formed. When the two modules TFTAM and CFAM are bonded together, as shown in FIG. 8C, a flexible liquid crystal display device in which a thin film transistor array, a touch sensor, and a color filter array are integrated may be manufactured. This will be described later with reference to FIG. 8. First, a process of forming a thin film transistor array (TFT) on the base film 200, that is, manufacturing a thin film transistor array module (TFTAM), will be described with reference to FIGS. 9 to 11. To explain,

9 is a flowchart illustrating a manufacturing process of a thin film transistor array module (TFTAM) according to an exemplary embodiment of the present invention, and FIGS. 10 and 11 are cross-sectional views of intermediate products of each manufacturing process of a thin film transistor array module according to an exemplary embodiment of the present invention. It is illustrated.

Referring to FIG. 9, first, a polymer organic film is coated on a glass substrate to form a separation layer 220 as illustrated in FIG. 10A (S110). The separation layer 220 is a layer formed to separate the thin film transistor array (TFT, 250) formed on the glass substrate from the glass substrate, and the separation layer 220 is formed on the thin film transistor array (TFT, 250). It can also be carried out with the function of wrapping and insulating the insulation. The method of applying the separation layer 220 may be a known coating method such as spin coating, die coating, spray coating and the like.

Since the material and the formation process of the separation layer 220 are described above, they will be omitted below.

After the separation layer forming step (S110), as shown in FIG. 10B, a protective layer 230 may be additionally formed on the separation layer 220 (S120). This protective layer 230 is an optional component that can be omitted as needed.

The protective layer 230 covers the thin film transistor array TFT 250 to be described later together with the separation layer 220 to protect the thin film transistor array layer. The protective layer 230 may be formed to cover at least a portion of the side surface of the separation layer 220. The side of the separation layer 220 is an edge sidewall of the separation layer 230. In terms of completely blocking side exposure of the separation layer 220, the protective layer 230 is preferably configured to cover all of the side surfaces of the separation layer 220.

When the separation layer 220 or the protection layer 230 is formed, as shown in FIG. 10C, the capping layer 240 is disposed on the separation layer 220 or on the protection layer 230. To form (step S130). The capping layer 240 is formed by forming a capping layer 240 so as to cover the side of the separation layer 220 and the protective layer 230 by depositing a composition for forming a capping layer, preferably an inorganic insulating material such as SiNx, SiOx, or the like. It is desirable to.

When the capping layer 240 is formed on the separation layer 220 or the protective layer 230, the thin film is sequentially formed on the capping layer 240 as illustrated in FIGS. 10D and 10E and 11. The transistor array TFT 250 is formed (step S140).

More specifically, the thin film transistor array TFT 250 may include a gate layer (gate electrode metal layer 251), a gate insulating layer 253, a semiconductor layer 255, an active layer and an ohmic contact layer, and an S / D layer (source / A drain electrode metal layer 257, a passivation layer 258, and an ITO pixel electrode layer 259 may be included.

As shown in FIG. 10D, the gate layer 251 may be formed of a conductive material such as Mg, Al, Ni, Au, and the like, and as illustrated in FIG. 10E, the gate insulating layer covering the gate layer 251. Reference numeral 253 may be formed of an insulating material layer such as a silicon oxide layer or a silicon nitride layer.

As shown in FIG. 11A, an active layer, which is one component of the semiconductor layer 255, is formed on the gate insulating layer 253. The active layer overlaps the gate layer 251 to form a channel. A channel is formed between the source / drain electrodes of the S / D layer 257 on the gate layer 251. It can be formed from a polysilicon layer or an amorphous silicon layer as an active layer.

The ohmic contact layer constituting the semiconductor layer 255 is formed on the active layer except for the channel portion for ohmic contact with the source / drain electrodes. The source / drain electrodes of the S / D layer 257 are formed to face each other with the channel portion therebetween.

As shown in FIG. 11C, a protective layer 258 is formed on the S / D layer 257, and a pixel electrode layer 259 connected to the source / drain electrodes is formed as shown in FIG. 11D. The pixel electrode is formed using an indium tin oxide (ITO) electrode. The protective layer 258 may also be formed of an inorganic insulating material or an organic insulating material. It will be apparent to those skilled in the art that such a thin film transistor array is only one example and may be formed in various known manners.

When the thin film transistor array TFT 250 is formed on the capping layer 240 in the same manner as described above, the protective film coated on one surface of the adhesive layer is bonded to the pixel electrode layer 259 (S150). The protective film may be a transparent optical film or a polarizing plate. The transparent optical film may be surface treated as needed. Such surface treatments include, for example, plasma treatments, corona treatments, dry treatments such as primer treatments, and chemical treatments such as alkali treatments including saponification treatments. In addition, the transparent optical film may be an isotropic film, a retardation film or a protective film.

When the protective film is bonded through the transfer process, the glass substrate as the carrier substrate and the separation layer 220 are separated (step S160). That is, the separation layer 220 in which the thin film transistor array TFT 250 is formed may be separated from the organic substrate using a method of peeling. The peeling method may include a lift-off or peel-off method, but is not limited thereto.

After separating the glass substrate from the separation layer 220, as shown in Figure 7 (b) by adhering the base film 200 coated with the adhesive 210 on one surface (step S170), A thin film transistor array module (TFTAM) having a cross-sectional structure as shown in b) may be manufactured. Of course, in FIG. 7B, the protective film positioned on the TFT array is removed, and then the alignment layer 260 and the liquid crystal layer 270 are additionally formed.

If the thin film transistor array module (TFTAM) is manufactured by the above method, the thin film transistor array is also formed on the glass substrate, so there is no fear of deformation of the base material for forming the semiconductor layer even if a high temperature process for forming the semiconductor layer is applied. Reliable thin film transistor arrays can be fabricated.

When the flexible color filter array module (CFAM) and the thin film transistor array module (TFTAM) are manufactured by using the method shown in FIGS. 3 and 9, that is, the first and second substrates, respectively, FIGS. (b) and as shown in FIG. 8, the alignment layers 180 and 260 are formed on the respective modules TFTAM and CFAM, respectively, to impart alignment properties to prevent distortion of the liquid crystal that may be generated during flexible implementation. The alignment film patterning process for imparting orientation can use a method disclosed in Application No. 10-2010-0025931.

After forming the alignment layers 260 and 180 in each of the modules TFTAM and CFAM, the liquid crystal layer 270 is formed on the thin film transistor array TFT above the thin film transistor array module TFTAM, and then on the thin film transistor array module TFTAM. FIG. 8 illustrates a thin film transistor array module TFTAM and a flexible color filter array module CFAM such that the liquid crystal layer 270 formed thereon and the color filter array CF formed on the flexible color filter array module CFAM face each other. Joining as shown in (c) of FIG.

As a result, as illustrated in FIG. 8C, a flexible liquid crystal display device in which the thin film transistor array, the color filter, and the touch sensor are integrated may be manufactured.

Accordingly, the present invention can manufacture a flexible liquid crystal display device including a flexible color filter array and a thin film transistor array without deformation of product components even at a high temperature process in a manufacturing process, but can manufacture a flexible liquid crystal display device in which a touch sensor is integrated together. It is a useful invention.

As a modified embodiment of the present invention, the flexible liquid crystal display device may be manufactured by bonding an external thin film transistor array module to the flexible color filter array module according to an embodiment of the present invention, and the substrate layer of the thin film transistor array module. May be one of the base film or the non-flexible substrate described in the embodiment of the present invention.

Although the above has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims

Forming a separation layer on the substrate;

Forming an electrode pattern layer constituting a touch sensor on the separation layer;

Forming a protective layer on the electrode pattern layer;

Forming a planarization layer on the protective layer to prevent color shift of the color filter;

Forming a color filter array on the planarization layer;

Bonding a protective film coated on one surface of the adhesive layer on the color filter array; Flexible color filter manufacturing method comprising a touch sensor.
The method of claim 1, further comprising: separating the substrate from the separation layer;

Adhering a substrate film to one surface of the separation layer from which the substrate is separated.
The method of claim 1 or 2, further comprising forming a protective layer between the separation layer and the electrode pattern layer.
The method of claim 3, wherein the flattening layer has a thickness of 2 μm or more or a surface step of 0.1 μm or less.
The method of claim 2, further comprising removing the protective film after adhering the base film.
The method of claim 5, wherein the planarization layer is formed of an organic insulating material.
The method of claim 1 or 2, wherein the thickness of the planarization layer is 2 µm or more or the surface level is 0.1 µm or less.
The method of claim 1 or 2, wherein the planarization layer is formed of an organic insulating material.
A separation layer formed on the substrate;

An electrode pattern layer formed to form a touch sensor on the separation layer;

A protective layer formed on the electrode pattern layer;

A planarization layer formed on the protective layer to prevent color shift of the color filter;

A color filter array formed on the planarization layer;

And a protective film laminated on the color filter array. The flexible color filter having a touch sensor integrated therein.
The flexible color filter of claim 9, further comprising: another protective layer formed between the separation layer and the electrode pattern layer.
The flexible color filter of claim 9 or 10, wherein the planarization layer has a thickness of 2 µm or more or a surface step of 0.1 µm or less.
The flexible color filter as claimed in claim 9 or 10, wherein the planarization layer is formed of an organic insulating material.
Forming an alignment layer on the color filter array of the flexible color filter array module in which the touch sensor and the color filter array are integrally formed on the first substrate film;

Forming an alignment layer and a liquid crystal layer on the thin film transistor array of the thin film transistor array module having a first separation layer and a capping layer formed on the substrate layer, and a thin film transistor array formed on the capping layer;

Bonding the flexible color filter array module and the thin film transistor array module to face the liquid crystal layer formed on the thin film transistor array module and the color filter array formed on the flexible color filter array module. Flexible liquid crystal display manufacturing method.
The method of claim 13, wherein the flexible color filter array module,

Forming a second separation layer on the first substrate;

Forming an electrode pattern layer constituting a touch sensor on the second separation layer;

Forming a first protective layer on the electrode pattern layer;

Forming a planarization layer on the first protective layer to prevent color shift of the color filter;

Forming a color filter array on the planarization layer;

Bonding a first protective film having an adhesive layer applied on one surface thereof to the color filter array;

Separating the first substrate from the second separation layer;

Adhering the first substrate film to one surface of the second separation layer from which the first substrate is separated;

Removing the first protective film; and manufacturing the flexible liquid crystal display device.
The method of claim 14, further comprising forming a second protective layer between the second separation layer and the electrode pattern layer.
The method of claim 15, wherein the planarization layer has a thickness of 2 μm or more or a surface step of 0.1 μm or less.
The method of claim 14, wherein the planarization layer is formed of an organic insulating material.
The method of claim 14, wherein the planarization layer has a thickness of 2 μm or more or a surface step of 0.1 μm or less.
19. The method of claim 18, wherein the planarization layer is formed of an organic insulating material.
The method of claim 13, wherein the thin film transistor array module,

Forming the first separation layer on the substrate layer;

Forming a capping layer on the first separation layer;

Forming a thin film transistor array on the capping layer;

Bonding a second protective film coated on one surface of an adhesive layer on the thin film transistor array;

Separating the base layer from the first separation layer;

Adhering the second substrate film to one surface of the first separation layer from which the substrate layer is separated;

Removing the second protective film; and manufacturing the flexible liquid crystal display device.
21. The method of claim 20, further comprising forming a third protective layer between the first separation layer and the capping layer.
22. The method of claim 20 or 21, wherein the capping layer is formed of an inorganic insulating layer material.
The method of claim 20, wherein the planarization layer has a thickness of 2 μm or more or a surface step of 0.1 μm or less.
22. The method of claim 20 or 21, wherein the planarization layer is formed of an organic insulating material.
The method of claim 13, wherein the thin film transistor array module,

Forming the first separation layer on the substrate layer;

Forming a capping layer on the first separation layer;

Forming a thin film transistor array on the capping layer;

Bonding a second protective film coated on one surface of an adhesive layer on the thin film transistor array;

Separating the base layer from the first separation layer;

Adhering the second substrate film to one surface of the first separation layer from which the substrate layer is separated;

Removing the second protective film; and manufacturing the flexible liquid crystal display device.
The method of claim 25, further comprising forming a third protective layer between the first separation layer and the capping layer.
27. The method of claim 25 or 26, wherein the capping layer is formed of an inorganic insulating layer material.
The method according to any one of claims 13, 14, 15, 20, 21, 25, and 26, wherein the flexible color filter array module or the thin film transistor array module is provided with an orientation when forming an alignment layer. The manufacturing method of the flexible liquid crystal display device made into.
The flexible substrate according to any one of claims 13, 14, 15, 20, 21, 25, and 26, wherein the base layer of the thin film transistor array module is either a base film or a non-flexible substrate. Method of manufacturing a liquid crystal display device.
A separation layer formed on the base film;

An electrode pattern layer formed on the separation layer to implement a touch sensor;

A protective layer formed on the electrode pattern layer;

A planarization layer formed on the protective layer to prevent color shift of the color filter;

A color filter array formed on the planarization layer;

And a protective film laminated on the color filter array. The flexible color filter having a touch sensor integrated therein.
31. The flexible color filter of claim 30, further comprising a protective layer formed between the separation layer and the electrode pattern layer.
32. The flexible color filter of claim 30 or 31, wherein the planarization layer has a thickness of 2 µm or more or a surface step of 0.1 µm or less.
32. The flexible color filter of claim 30 or 31, wherein the planarization layer is formed of an organic insulating material.
A flexible color filter array module in which a touch sensor and a color filter array are integrally formed on the first substrate film;

A thin film transistor array module having a first separation layer and a capping layer formed on the substrate layer, and a thin film transistor array formed on the capping layer;

And a liquid crystal layer bonded to the flexible color filter array module and the thin film transistor array module so that the thin film transistor array and the color filter array formed on the flexible color filter array module face each other. Flexible liquid crystal display device.
The method of claim 34, wherein the flexible color filter array module,

A second separation layer formed on the first base film;

An electrode pattern layer formed on the second separation layer to implement a touch sensor;

A first protective layer formed on the electrode pattern layer;

A planarization layer formed on the first protective layer to prevent color shift of the color filter;

A color filter array formed on the planarization layer;

And an alignment layer formed on the color filter array.
36. The flexible liquid crystal display device of claim 35, further comprising a second protective layer formed between the second separation layer and the electrode pattern layer.
37. The flexible liquid crystal display of claim 35 or 36, wherein the planarization layer has a thickness of 2 µm or more or a surface step of 0.1 µm or less.
37. The flexible liquid crystal display of claim 35 or 36, wherein the planarization layer is formed of an organic insulating material.
37. The flexible liquid crystal display device according to claim 35 or 36, wherein an alignment property is imparted when the alignment layer is formed.
The thin film transistor array module of claim 34 or 35,

The first separation layer formed on the base layer;

The capping layer formed on the first separation layer;

A thin film transistor array formed on the capping layer;

And an alignment layer formed on the thin film transistor array.
The flexible liquid crystal display of claim 40, further comprising a third protective layer formed between the first separation layer and the capping layer.
42. The flexible liquid crystal display of claim 41, wherein the capping layer is formed of an inorganic insulating layer material.
41. The flexible liquid crystal display of claim 40, wherein the capping layer is formed of an inorganic insulating layer material.
41. The flexible liquid crystal display device according to claim 40, wherein the flexible color filter array module or the thin film transistor array module further provides orientation when forming an alignment layer.
The flexible liquid crystal display device of claim 34, 35 or 36, wherein the base layer of the thin film transistor array module is one of a base film and a non-flexible substrate.