KR102543630B1 - Flexible color filter and flexible liquid crystal display - Google Patents

Abstract

The present invention relates to a flexible color filter in which a touch sensor is integrated, a flexible liquid crystal display device in which the touch sensor, color filter, and thin film transistor array are integrated, and a method for manufacturing the same, and a color filter in which the thin film transistor array or touch sensor is integrated on a glass substrate Since the filter is formed, even if a high-temperature process for forming the semiconductor layer is applied, there is no risk of deformation of the base material necessary for forming the semiconductor layer, so a reliable product, that is, a thin film transistor array, a flexible color filter integrated with a touch sensor, There is an advantage in that a flexible liquid crystal display device in which a color filter and a thin film transistor array are integrated can be manufactured.

Description

Flexible color filter integrated with touch sensor and flexible liquid crystal display and its manufacturing method {FLEXIBLE COLOR FILTER AND FLEXIBLE LIQUID CRYSTAL DISPLAY}

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 manufacturing method thereof.

As the touch input method has been spotlighted as a next-generation input method, attempts are being made to introduce the touch input method to more various electronic devices. Accordingly, research and development on touch sensors that can be applied to various environments and enable accurate touch recognition have been actively conducted. are losing

For example, in the case of electronic devices having a touch-type display, ultra-thin flexible displays that achieve ultra-light weight, low power consumption, and improved portability have been attracting attention as next-generation displays, and development of touch sensors applicable to such displays has been required. A flexible (flexible) display means a display manufactured on a flexible substrate that can be bent, bent, or rolled without loss of characteristics, and technology development is being made in the form of flexible LCD, flexible OLED, and electronic paper.

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

The invention disclosed in Korean Patent Laid-Open Publication No. 10-2014-0126681 provides a bonding substrate comprising a rigid substrate and a carrier-removable adhesive layer disposed on the support substrate, and a flexible substrate on the carrier-removed adhesive layer. adhering, forming a color filter module by forming a color filter layer on the flexible substrate, 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 It is characterized in that the flexible color filter is manufactured by performing a cooling process to perform.

That is, the exemplified disclosed patent application is a technology of manufacturing a flexible color filter in the form of a film by bonding a film layer such as a flexible substrate on a substrate to form a color filter layer, and then peeling the film layer through a cooling process.

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

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

Therefore, the present invention is an invention invented to solve the above-mentioned problems, and the 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 device including the same, and manufacturing of each of the same in providing a way,

Furthermore, another object of the present invention is a flexible color filter integrated with a touch sensor capable of improving production yield compared to the conventional method of manufacturing a color filter by attaching a film layer on a substrate and a flexible liquid crystal display device including the same is in providing

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

A flexible color filter manufacturing method in which a touch sensor is integrated according to an embodiment of the present invention for solving the above technical problem is,

forming a separation layer on a 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 flattening layer on the passivation layer to prevent the color filter from distorting;

forming a color filter array on the planarization layer;

Bonding a protective film having a pressure-sensitive adhesive layer applied on one side thereof onto the color filter array;

separating the substrate from the separation layer;

It is characterized in that it includes the step of adhering a base film to one surface of the separation layer from which the substrate is separated.

A flexible color filter integrated with a touch sensor according to an 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 flattening layer formed on the protective layer to prevent a color filter from distorting color;

a color filter array formed on the planarization layer;

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

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

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

forming an alignment layer and a liquid crystal layer on the thin film transistor array of a thin film transistor array module in which a first separation layer and a capping layer are formed on the base layer and the thin film transistor array is formed on the capping layer;

and bonding the flexible color filter array module and the thin film transistor array module so that the liquid crystal layer formed in the thin film transistor array module and the color filter array formed in the flexible color filter array module face each other. do.

A flexible liquid crystal display device according to another embodiment of the present invention,

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

A thin film transistor array module having a first separation layer and a capping layer formed on the base 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 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 a bonding surface. characterized by

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 flattening layer formed on the first protective layer to prevent a color filter from distorting color;

a color filter array formed on the planarization layer;

Another feature is that an alignment layer formed on the color filter array is included.

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 the 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, the exemplified film layer of the prior art) has the advantage of being able to manufacture a reliable product, that is, a flexible color filter in which a touch sensor is integrated, without fear of deformation,

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

Furthermore, the present invention manufactures 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 high temperature during the manufacturing process, but a flexible liquid crystal display device in which a touch sensor is integrated It is a useful invention that can be manufactured.

1 is an exemplary cross-sectional structure of a flexible color filter in which a touch sensor is integrated according to an embodiment of the present invention.
2 is a diagram for amplifying the influence of steps generated by electrode patterns constituting a touch sensor when forming a color filter array on a protective layer;
3 is a flowchart illustrating a manufacturing process of a flexible color filter integrated with a touch sensor according to an embodiment of the present invention.
4 and 5 are illustrative views of the cross-sectional structure of a flexible color filter according to an embodiment of the present invention for each manufacturing process.
6 is a partially enlarged illustration of a flexible color filter according to an embodiment of the present invention.
7 is an exemplary cross-sectional structure diagram of a flexible color filter array module (a) and a thin film transistor array module (b) constituting a flexible liquid crystal display according to an embodiment of the present invention.
FIG. 8 is a view illustrating a bonding state of a flexible liquid crystal display manufactured by bonding the flexible color filter array module and the thin film transistor array module shown in FIG. 7;
9 is an exemplary flow diagram of 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 of intermediate products for each manufacturing process of a thin film transistor array module according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are only illustrated for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention It can be embodied in various forms and is not limited to the embodiments described herein.

In addition, since embodiments according to the concept of the present invention can be made with various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosure forms, and includes all changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

In addition, in describing the embodiments of the present invention, if it is determined that specific descriptions such as known functions or configurations (for example, the shape of an electrode pattern, a method of forming an electrode pattern, etc.) may unnecessarily obscure the gist of the present invention, A detailed description thereof will be omitted.

[Embodiments of a flexible color filter integrated with a touch sensor and a method for manufacturing the same]

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

As shown in FIG. 1, the flexible color filter in which the touch sensor is integrated according to an embodiment of the present invention does not use a film layer to prevent deformation of the film layer due to a high temperature process, and forms a separation layer on a glass substrate to It is characterized in that it is manufactured by bonding the base film 100 after sequentially forming the touch sensor and the color filter array.

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

A separation layer 120 formed on the base film 100,

Electrode pattern layers 131, 132, 133, 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 flattening layer 150 formed on the protective layer 140 to prevent the color filter from distorting color;

color filter arrays (CFs, 160 and 170) formed on the planarization layer 150;

It is characterized by including a protective film (not shown) bonded on the color filter array (CF, 160, 170).

As is known, the electrode pattern layer for configuring or implementing a touch sensor includes a first electrode pattern 131 arranged in a first direction (eg, an x-axis direction) and a second direction (eg, a y-axis direction) A second electrode pattern 132 arranged in a , an insulating layer 133 for insulating the first and second electrode patterns 131 and 132 , and a bridge electrode for connecting the first electrode patterns 131 electrically spaced apart from each other. pattern 135. In the following, for convenience of explanation, it will be assumed that the electrode pattern layer includes the first and second electrode patterns 131 and 132 , the insulating layer 133 , and the bridge electrode pattern 135 . Reference numeral 110 in FIG. 1 denotes an adhesive applied to one surface of the base film 100 .

Meanwhile, a 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 in which the touch sensor is integrated 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 this protective layer is not shown in FIG. 1 , reference numeral 125 is shown in FIG. 4 .

If the color filter array (CF) is formed directly on the protective layer 140 constituting the touch sensor, pixel deformation of the color filter may occur due to the step caused by the electrode pattern constituting the touch sensor, resulting in color distortion. there is. 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 is preferably formed of an organic insulating film material as a forming material. In addition, when the thickness of the surface step (roughness) of the planarization layer 150 is 0.1 μm or less, color distortion of the color filter can be prevented.

For reference, (a) of FIG. 2 illustrates a screen that is recognized as a stain due to color distortion caused by a surface step when the thickness of the surface step is 0.1 μm or more, and (b) of FIG. It is an example of a comparison graph of the characteristics of the panel.

Based on these experimental characteristics, when the surface step thickness is 0.1 μm or less, color distortion of the color filter can be normally prevented, so it is preferable to set the surface step thickness to 0.1 μm or less.

data Stained part height (㎛) Normal part (㎛) Stained part height deviation (㎛) stain result No1 4.117 3.647 0.470 Kang Su-won NG No2 3.795 3.700 0.095 beautiful woman OK

Hereinafter, a method of manufacturing a flexible color filter integrated with 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 flowchart of a manufacturing process of a flexible color filter in which a touch sensor is integrated according to an embodiment of the present invention, and FIGS. 6 illustrates a partially enlarged view of a flexible color filter integrated with a touch sensor according to an embodiment of the present invention.

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

The separation layer 120 is a layer formed to separate the touch sensor TS and the color filter array CF to be formed on the glass substrate from the glass substrate. ) can be wrapped and coated and insulated. For reference, a known coating method such as spin coating, die coating, or spray coating may be used as a method of applying the separation layer.

The peel force of the separation layer 120 is not particularly limited, but may be, for example, 0.01 to 1 N/25 mm, preferably 0.01 to 0.2 N/25 mm. When the above range is satisfied, the separation layer 120 can be easily peeled from the glass substrate without residue in the manufacturing process, and curl and cracks caused by tension generated during peeling can 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 above range is satisfied, peel force is stable and a uniform pattern can be formed.

Materials of the separation layer 120 include polyimide-based polymers, polyvinyl alcohol-based polymers, polyamic acid-based polymers, polyamide-based polymers, polyethylene-based polymers, polystyrene-based polymers, polynorbornene-based polymers, and phenylmaleimide copolymers. It may be made of a polymer such as a copolymer)-based polymer or a polyazobenzene-based polymer, and these may be used alone or in combination of two or more.

As the curing process for forming the separation layer 120, thermal curing or UV curing may be used alone or a combination of thermal curing and UV curing may be used.

After the separation layer forming step (step S10), a protective layer 125 (which may be referred to as a first protective layer) may be additionally formed on the separation layer 120 as shown in (b) of FIG. 4. This protective layer 125 is an optional component that can be omitted if necessary. The protective layer 125 serves to cover and protect the electrode pattern layers 131 , 132 , 133 , and 135 to be described later together with the separation layer 120 . The protective layer 125 may be formed to cover at least a portion of a side surface (edge sidewall) of the separation layer 120 . In terms of completely blocking side exposure of the separation layer 120, it is preferable to configure the protective layer 125 to cover the entire side surface of the separation layer 120.

In the electrode pattern layer forming step ( S30 ), a process of forming 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 sensing a touch signal input by a user, that is, a first electrode pattern 131 sensing an x-coordinate and a second electrode pattern 132 sensing a y-coordinate. ), 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. These electrode pattern layers (131, 132, 133, 135) forming process and forming materials are already known, so they will be omitted below, and in FIG. 4 (c), (d) and (e), the first and second protective layers 125, respectively. Formation of the electrode patterns 131 and 132, formation of the insulating layer 133 on the first and second electrode patterns 131 and 132, and formation of the bridge electrode pattern 135 on the insulating layer 133 are shown in the cross-sectional structure of each manufacturing process. did For reference, the thickness and number of layers of the electrode pattern layers 131 , 132 , 133 , and 135 are not particularly limited, but are preferably as thin as possible considering the flexibility of the touch sensor.

When the electrode pattern layers 131, 132, 133, and 135 are formed, as shown in FIG. 5(f), a protective layer 140 (which may be referred to as a second protective layer) is formed to cover the electrode pattern layers 131, 132, 133, and 135 (step S40). do. The protective layer 140 (passivation) is formed so that the surface opposite to the surface in contact with the electrode pattern layers 131, 132, 133, and 135 has a flat shape. Such a protective layer 140 may be formed of a single layer or a plurality of layers of two or more layers, It is preferable to use a material or material having the same refractive index as the layer 133 .

Then, as shown in (g) of FIG. 5, a planarization layer 150 is formed on the protective layer 140 (Step S50). As described above, the flattening layer 150 is formed to prevent color distortion caused by pixel deformation of the color filter due to a step caused by an electrode pattern. The thickness of the planarization layer 150 is preferably 2 μm or more, and the planarization layer 150 is preferably formed of an organic insulating film material as a forming material.

Referring to (a) and (b) of FIG. 6 , when the flattening layer 150 is formed as in (b), the pixel of the color filter is also caused by the generation of a step (S) by the electrode pattern of the touch sensor. Since there is no deformation, color distortion can be prevented.

After one or more planarization layers 150 are formed, a color filter array CF is formed on the planarization layer 150 as shown in (h) of FIG. 5 (step 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 and formed in a matrix form, and are referred to as black matrix layers. A color filter (R, G, B) layer 160 is formed between the light blocking layers, and an ITO common electrode 170 is further formed on the color filter (R, G, B) layer 160 .

As described above, after the color filter array (CF) is formed on the flattening layer 150, the protective film coated on one side of the pressure-sensitive adhesive layer is bonded to the color filter array (CF) through a transfer process (step S70). do.

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

Thereafter, the base film 100 coated with the adhesive 110 is adhered to one surface of the separation layer 120 separated from the glass substrate (Step S90), and the protective film bonded to the color filter array (CF) is removed (Step S100). If so, it is possible to manufacture a flexible color filter in which a touch sensor having a cross-sectional structure as shown in FIG. 1 is integrated.

Since the flexible color filter manufactured according to the manufacturing process as described above 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 (ie, the exemplified prior art There is no risk of deformation of the film layer), so a reliable product, that is, a flexible color filter in which a touch sensor is integrated can be manufactured.

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

On the other hand, from the manufacturer's point of view, according to the sales policy, a separation layer is formed on the glass substrate, an electrode pattern layer constituting the touch sensor is formed on the separation layer, and after forming a protective layer on the electrode pattern layer, the protective layer is formed on the protective layer. A flexible color filter may be sold in a form in which a color filter array is formed on the flattening layer to prevent color distortion of the color filter, and then a protective film is bonded to the color filter array. The flattening layer of the flexible color filter having this structure is also characterized in that it is formed of an organic insulating film material, and the thickness of the flattening layer is preferably 2 μm or more and the surface step difference is 0.1 μm or less.

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

In the following embodiment, to avoid redundant description, the manufacturing method of the flexible color filter integrated with the touch sensor described in FIG. 3 will be omitted, and for convenience, the flexible color filter integrated with the touch sensor manufactured by FIG. A color filter array module (CFAM)" is defined, and a thin film transistor array bonded to the flexible color filter array module is defined as a "thin film transistor array module (TFTAM)" to describe an embodiment.

[Embodiments of a flexible liquid crystal display in which a touch sensor is integrated with a flexible color filter array module (CFAM) and a thin film transistor array module (TFTAM) are integrated and a method for manufacturing the same]

First, FIG. 7 is a cross-sectional structure diagram 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 embodiment of the present invention. FIG. Each of the bonding states of the flexible liquid crystal display manufactured by bonding the flexible color filter array module (TFTAM) and the thin film transistor array module (CFAM) shown in FIG.

As a result, as shown in (c) of 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 base 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 on the capping layer 240, a thin film transistor array (TFT, 250) is formed, a thin film transistor array module (TFTAM),

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

As shown in (b) of FIG. ) may be further formed. Of course, a protective layer may be further formed between the separation layer 120 on the first base 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 (a) of FIG. 7 has already been described with reference to FIG. 3, it will be omitted below. However, in order to manufacture a flexible liquid crystal display using the flexible color filter array module (CFAM) manufactured by the method described in FIG. 3, after removing the protective film from the manufactured flexible color filter array module (CFAM), there may be As shown in FIG. It is preferable to arrange the liquid crystal layer 270 in a certain direction.

For convenience of description, FIG. 7(a) shows a state in which the alignment film 180 is formed on the flexible color filter array module (CFAM), and FIG. 7(b) shows the alignment film on the thin film transistor array module (TFTAM). 260 and a state in which the liquid crystal layer 270 is formed. When these two modules (TFTAM, CFAM) are bonded, as shown in (c) of FIG. 8, a flexible liquid crystal display in which a thin film transistor array, a touch sensor, and a color filter array are integrated can be manufactured. This will be described later with reference to FIG. 8 , and first, the 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 amplified with reference to FIGS. 9 to 11 To explain,

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

Referring to FIG. 9 , first, a polymer organic film is coated on a glass substrate to form a separation layer 220 as shown in FIG. 10 (a) (step 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 perform the function of wrapping and covering and insulating it. As a method of applying the separation layer 220, known coating methods such as spin coating, die coating, and spray coating may be used.

Since the material and forming process of the separation layer 220 have been described above, they will be omitted below.

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

The protective layer 230 serves to protect the thin film transistor array layer by covering the thin film transistor array (TFT) 250 to be described later together with the separation layer 220 . The protective layer 230 may be formed to cover at least a portion of a side surface of the separation layer 220 . The side of the separation layer 220 is an edge side wall of the separation layer 230 . In terms of completely blocking side exposure of the separation layer 220 , it is preferable to configure the protective layer 230 to cover the entire side surface of the separation layer 220 .

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

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 shown in (d) and (e) of FIG. 10 and FIG. 11. A transistor array (TFT) 250 is formed (step S140).

More specifically, the thin film transistor array (TFT, 250) includes 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/ohmic contact layer). A drain electrode metal layer 257), a passivation layer 258, and a pixel electrode layer 259 (ITO pixel electrode layer) may be included.

As shown in (d) of FIG. 10, the gate layer 251 may be formed of a conductive material such as Mg, Al, Ni, Au, etc., and as shown in (e) of FIG. 10, a gate insulating layer covering the gate layer 251. 253 may be formed of an insulating material layer such as a silicon oxide layer or a silicon nitride layer.

As shown in (a) of FIG. 11 , an active layer, which is a component of the semiconductor layer 255 , is formed on the gate insulating layer 253 . This active layer overlaps with 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 . As the active layer, a polysilicon layer or an amorphous silicon layer may be formed.

An 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 interposed therebetween.

As shown in FIG. 11(c), a passivation 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. 11(d). 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. This thin film transistor array is just one example, and it will be apparent to those skilled in the art that it can be formed in various known methods.

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 (step S150). The protective film may be a transparent optical film or a polarizing plate. The transparent optical film may be surface-treated if necessary. Examples of such surface treatment include dry treatment such as plasma treatment, corona treatment, and primer treatment, chemical treatment such as alkali treatment including saponification treatment, and the like. Also, 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 separation layer 220 is separated from the glass substrate as a carrier substrate (step S160). That is, it can be separated from the organic substrate by using a method of peeling the separation layer 220 on which the thin film transistor array (TFT) 250 is formed. The peeling method includes 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 FIG. A thin film transistor array module (TFTAM) having a cross-sectional structure as shown in b) can be manufactured. Of course, in (b) of FIG. 7, after removing the protective film located on the thin film transistor array module (TFTAM), the alignment film 260 and the liquid crystal layer 270 are additionally formed.

When the thin film transistor array module (TFTAM) is manufactured by the above method, since the thin film transistor array is also formed on a glass substrate, 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. A reliable thin film transistor array can be manufactured.

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

After forming the alignment films 260 and 180 on each module (TFTAM, CFAM), a liquid crystal layer 270 is formed on the top of the thin film transistor array (TFT) on the top of the thin film transistor array module (TFTAM), and then on the top of the thin film transistor array module (TFTAM). The thin film transistor array module (TFTAM) and the flexible color filter array module (CFAM) are arranged so that the formed liquid crystal layer 270 and the color filter array (CF) formed on the flexible color filter array module (CFAM) face each other in FIG. 8 . Join as shown in (c) of.

As a result, as shown in (c) of FIG. 8, a flexible liquid crystal display device in which a thin film transistor array, a color filter, and a touch sensor are integrated can be made.

Therefore, the present invention manufactures a flexible liquid crystal display device including a flexible color filter array and a thin film transistor array in which product components are not deformed even at high temperature during the manufacturing process, but a flexible liquid crystal display device in which a touch sensor is integrated can be manufactured. It is a useful invention.

As a modified embodiment of the present invention, a flexible liquid crystal display device may be manufactured by bonding a thin film transistor array module made externally to a flexible color filter array module according to an embodiment of the present invention, and the base layer of the thin film transistor array module One of the base films or non-flexible substrates described in the embodiments of the present invention may be used.

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

Claims (45)

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 flattening layer on the passivation layer to prevent the color filter from distorting;
forming a color filter array on the planarization layer;
Bonding a protective film having an adhesive layer applied on one surface onto the color filter array; including,
A flexible color filter manufacturing method in which a touch sensor is integrated, characterized in that the surface step thickness of the planarization layer is 0.1 μm or less. The method according to claim 1, Separating the substrate from the separation layer;
A flexible color filter manufacturing method in which a touch sensor is integrated, comprising: adhering a base film to one surface of the separation layer from which the substrate is separated. The method according to claim 1 or 2, further comprising forming a protective layer between the separation layer and the electrode pattern layer. delete The method of claim 2, further comprising: removing the protective film after attaching the base film. The method of claim 1 or 2, wherein the flattening layer is formed of an organic insulating film material. delete delete a separation layer formed on the substrate;
an electrode pattern layer formed on the separation layer to configure a touch sensor;
a protective layer formed on the electrode pattern layer;
a flattening layer formed on the passivation layer to prevent a color filter from distorting color;
a color filter array formed on the planarization layer;
Including; a protective film bonded on the color filter array,
A flexible color filter integrated with a touch sensor, characterized in that the surface step thickness of the planarization layer is 0.1 μm or less. The flexible color filter of claim 9 , further comprising another protective layer formed between the separation layer and the electrode pattern layer. delete The flexible color filter of claim 9 or 10, wherein the flattening layer is formed of an organic insulating film material. After sequentially forming a first separation layer, an electrode pattern layer, a first protective layer, a planarization layer, and a color filter array on a glass substrate, a first base film is adhered to one surface of the first separation layer from which the glass substrate is separated. forming an alignment layer on the color filter array of the manufactured flexible color filter array module;
forming an alignment layer and a liquid crystal layer on the thin film transistor array of a thin film transistor array module in which a second separation layer and a capping layer are formed on the base layer and the thin film transistor array is formed on the capping layer;
bonding the flexible color filter array module and the thin film transistor array module so that the liquid crystal layer formed in the thin film transistor array module and the color filter array formed in the flexible color filter array module face each other,
A flexible liquid crystal display manufacturing method, characterized in that the surface step thickness of the planarization layer is 0.1 μm or less. delete The method of manufacturing a flexible liquid crystal display device according to claim 13, further comprising forming a second protective layer between the first separation layer and the electrode pattern layer. delete delete delete delete The method according to claim 13, wherein the thin film transistor array module,
forming the second separation layer on the substrate layer;
forming a capping layer on the second separation layer;
forming a thin film transistor array on the capping layer;
bonding a protective film having a pressure-sensitive adhesive layer coated on one side of the thin film transistor array;
separating the base layer from the second separation layer;
adhering a second base film to one surface of the second separation layer from which the base layer is separated;
A method for manufacturing a flexible liquid crystal display device comprising the steps of removing the protective film. 21. The method of claim 20, further comprising forming a third protective layer between the second separation layer and the capping layer. The method of manufacturing a flexible liquid crystal display device according to claim 20 or 21, wherein the capping layer is formed of an inorganic insulating layer material. delete The method of manufacturing a flexible liquid crystal display device according to claim 13 or 20, wherein the planarization layer is formed of an organic insulating film material. delete delete delete delete [Claim 14] The method of manufacturing a flexible liquid crystal display device according to claim 13, wherein the base layer of the thin film transistor array module is a non-flexible substrate. 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 flattening layer formed on the passivation layer to prevent a color filter from distorting color;
a color filter array formed on the planarization layer;
Including; a protective film bonded on the color filter array,
A flexible color filter integrated with a touch sensor, characterized in that the surface step thickness of the planarization layer is 0.1 μm or less. The flexible color filter of claim 30, further comprising a protective layer formed between the separation layer and the electrode pattern layer. delete The flexible color filter of claim 30 or claim 31, wherein the planarization layer is formed of an organic insulating film material. a flexible color filter array module in which a first separation layer, an electrode pattern layer, a first protective layer, a planarization layer, and a color filter array are sequentially formed and integrated on the first base film;
a thin film transistor array module having a second separation layer and a capping layer formed on the base 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 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 a bonding surface;
A flexible liquid crystal display device, characterized in that the surface step thickness of the planarization layer is 0.1 μm or less. The method according to claim 34, wherein the flexible color filter array module,
A flexible liquid crystal display device comprising an alignment layer formed on the color filter array. The flexible liquid crystal display of claim 35, further comprising a second protective layer formed between the first separation layer and the electrode pattern layer. delete 37. The flexible liquid crystal display device according to any one of claims 34 to 36, wherein the planarization layer is formed of an organic insulating film material. [Claim 36] The flexible liquid crystal display of claim 35, wherein alignment properties are imparted when the alignment layer is formed. The method according to claim 34, wherein the thin film transistor array module,
the second separation layer formed on the substrate layer;
the capping layer formed on the second separation layer;
a thin film transistor array formed on the capping layer;
A flexible liquid crystal display device comprising an alignment film formed on the thin film transistor array. 41. The flexible liquid crystal display of claim 40, further comprising a third protective layer formed between the second separation layer and the capping layer. 35. The flexible liquid crystal display of claim 34, wherein the capping layer is formed of an inorganic insulating material. delete delete 35. The flexible liquid crystal display device according to claim 34, wherein the substrate layer of the thin film transistor array module is a non-flexible substrate.

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