JP6708030B2 - Base material with coating layer for display device, color filter base material with coating layer for display device, laminate and method for producing base material with coating layer for display device - Google Patents

Description

The present invention relates to a substrate with a coating layer for a display device having a coating layer, a color filter substrate with a coating layer for a display device, a laminate, and a method for producing a substrate with a coating layer for a display device.

With the recent development of personal computers, especially portable personal computers, the demand for display devices has increased. In addition, recently, the popularity of home-use liquid crystal televisions has been increasing, and smartphones and tablet terminals are also becoming widespread. Therefore, the market of display devices is expanding more and more.

As a method for manufacturing such a display device, for example, a method of forming each constituent member in order from a base material to manufacture a display device or a transfer method on a constituent member formed on a base material is used. There is a method of manufacturing a display device by stacking other constituent members, but from the viewpoint of high productivity, there is an increasing demand for manufacturing a display device by a method using a transfer method.

In the method for manufacturing a display device using the transfer method, for example, as shown in FIG. 11A, the transfer base material 1b is formed on the first functional layer 2a formed on the base material 1a via the adhesive layer 6 and the transfer base material 1b. The display device 100 is obtained by pasting the second functional layer 2b formed above and then peeling off the transfer substrate 1b as shown in FIG. 11(b). By the way, a glass substrate or a film substrate may be used as the transfer substrate for the transfer substrate used in the method for manufacturing such a display device. For example, Patent Documents 1 and 2 disclose a transfer method using a film base material as a transfer base material.

Patent No. 4878825 JP, 2005-238286, A

When a pressure-sensitive adhesive layer is arranged on the side of the first functional layer and then the pressure-sensitive adhesive layer and the second functional layer are bonded together when manufacturing a display device, and the surface of the first functional layer on the pressure-sensitive adhesive layer side has an uneven shape. For example, as shown in FIG. 12A, the uneven shape of the first functional layer 2a affects the outermost surface of the adhesive layer 6 on the opposite side to the first functional layer 2a. Therefore, as shown in FIG. 12( b ), when the first functional layer 2 a and the second functional layer 2 b are bonded via the adhesive layer 6, at the contact interface between the adhesive layer 6 and the second functional layer 2 b. However, there is a problem that a void serving as a non-contact region is generated and the display characteristics of the display device are deteriorated. In FIGS. 12A and 12B, the first functional layer 2a is a color filter including a red coloring layer 21R, a green coloring layer 21G, a coloring layer 21 including a blue coloring layer 21B, and a light shielding portion 22. , And the overcoat layer 23.
When the adhesive layer is arranged on the second functional layer side and then the adhesive layer and the first functional layer are bonded together, for example, as shown in FIG. 13, the adhesive layer 6 and the first functional layer 2a There is a problem in that a void, which is a non-contact area, is generated at the contact interface, and the display characteristics of the display device are deteriorated.

By the way, the uneven shape of the first functional layer has, for example, a step between the colored layer and the light-shielding portion in the color filter as shown in FIGS. 12A, 12B and 13.
On the other hand, the inventors of the present invention, for example, when the first functional layer is a member for a display device used in a display device, the first functional layer includes a product region used as a display device and the product region described above. Attention was paid to the fact that there is a non-product region located on the outer periphery of the product and a particularly large step is generated between the product region and the non-product region.

This will be described with reference to FIGS. 14(a) to 14(c). FIG. 14A is a schematic plan view showing an example of a multi-faced display device, FIG. 14B is a sectional view taken along the line AA of FIG. 14A, and FIG. It is the BB sectional view taken on the line of FIG. For example, when the first functional layer 2a is a decorative member having the decorative portion 24 and the protective layer 25, the decorative portion 24 is formed as shown by the arrow in FIG. A step is generated on the side of the product region Y of the portion 24, and similarly to the above-described color filter, there is a problem that display characteristics are deteriorated due to the generation of voids. Further, as shown by the arrow in FIG. 14(c), by forming the decorative portion 24, a step is generated on the non-product region X side of the decorative portion 24, and a void is formed as in the color filter described above. Occur. In addition, in this specification, the area|region shown with the code|symbol X shown to FIG. 14(a)-FIG.14(c) is called a non-product area|region, and the area|region shown with the code|symbol Y is called a product area. Further, in FIGS. 14A to 14C, other functional layers are omitted for simplification of the drawings.

Further, FIG. 15 is a schematic cross-sectional view showing an example of a region corresponding to the cross-sectional view taken along the line BB of FIG. As shown in FIG. 15, in a display device, a frame light-shielding portion 22' is usually arranged as a first functional layer 2a in an outer peripheral area where members such as wirings are arranged. At this time, as shown by the arrow in FIG. 15, a step is formed on the non-product region X side between the frame light-shielding portions 22 ′ of the adjacent display devices, and a void is generated as in the color filter described above. It should be noted that although the multi-faceted display device has been described here as an example, the occurrence of the voids described above is not a problem limited to the multi-faceted display device, and may occur when the product region and the non-product region are included. It's a problem. Further, in FIG. 15, other functional layers are omitted for simplification of the drawing.

As shown in FIGS. 14A to 14C and FIG. 15 described above, when a step is generated in the product region Y and the non-product region X and a void is generated due to the step, the following problems are caused. May occur. That is, as shown in FIG. 11A, when the second functional layer 2b is attached to the surface of the first functional layer 2a on the base material 1a via the adhesive layer 6, a vacuum adsorption method may be used. is there. When bonding is performed by a reduced pressure adsorption method and a glass base material is used as the base materials 1a and 1b, the contact interface between the first functional layer 2a and the adhesive layer 6 or the second functional layer 2b and the adhesive surface. If a void that forms a non-contact area is generated at the contact interface with the layer 6, the air contained in the void may bounce off due to the reduced pressure, and the glass substrates 1a and 1b may be broken.

For such a problem, for example, the following method can be considered. That is, a method of increasing the thickness of the pressure-sensitive adhesive layer arranged on the first functional layer and filling the unevenness of the surface of the first functional layer including the product region and the non-product region to make the surface flat is conceivable. Therefore, when the inventors of the present invention tried the above method, in order to fill and flatten the unevenness of the surface of the first functional layer including the product region and the non-product region, the thickness of the adhesive layer was set to the above unevenness. It is necessary to have about 10 times the maximum step, and in this case, there is a problem that the thickness of the entire display device becomes large. The “maximum step of the uneven shape” means the distance from the surface of the concave portion having the deepest depth to the surface of the convex portion having the highest height in the uneven shape, and is, for example, the symbol of FIG. Refers to the distance indicated by t. In addition, in the present specification, the “concavo-convex shape of the surface including the product region and the non-product region of the first functional layer” may be simply referred to as the “concavo-convex shape of the surface of the first functional layer”. Further, the “first functional layer” may be simply abbreviated as “functional layer”.

The present invention has been made in view of the above circumstances, and it is possible to flatten the uneven shape having a predetermined step on the surface including the product region and the non-product region of the functional layer, and The main object of the present invention is to provide a base material with a coating layer for a display device capable of suppressing the generation of voids.

The inventors of the present invention have conducted earnest research to solve the above problems. As a result, it was found that by forming the coating layer by a predetermined method, it is possible to fill the uneven shape having a predetermined step on the surface of the functional layer and to flatten the surface. The inventors of the present invention have completed the present invention based on such findings.

That is, the present invention provides a base material, a first functional layer arranged on one surface of the base material, and a surface of the first functional layer opposite to the base material, and the transparency is improved. A substrate with a coating layer for a display device having a coating layer having a, wherein the substrate with a coating layer for a display device is a product region to be a display device, and a non-product region arranged on the outer periphery of the product region. The product area and the non-product area of the first functional layer have a step difference of 1.5 μm or more on the surface on the coating layer side, and the product area and the non-product area of the coating layer are: The step of the surface opposite to the first functional layer is 0.1 μm or less.

According to the present invention, by providing the coating layer on the surface having the predetermined step including the product region and the non-product region of the first functional layer, the step of the surface including the product region and the non-product region of the first functional layer. It is possible to provide a base material with a coating layer for a display device, which is capable of flattening and suppressing the generation of voids due to the step of the first functional layer.

Further, the present invention provides a base material, a first functional layer arranged on one surface of the base material, and a surface of the first functional layer opposite to the base material, which is transparent. A coating-layer-containing color filter substrate for a display device having a coating layer having, wherein the display-device coating layer-coated color filter substrate is a product region to be a display device, and is arranged on the outer periphery of the product region. A non-product region, the first functional layer is a color filter having a light-shielding portion having an opening, and a colored layer arranged in the opening, and the first functional layer has the product region and The non-product region has a step difference of 1.5 μm or more on the surface on the coating layer side, and the product region and the non-product region of the coating layer have a step difference on the side opposite to the first functional layer. Provided is a color filter substrate with a coating layer for a display device, which has a thickness of 0.1 μm or less.

According to the present invention, by providing a coating layer on a surface of a color filter having a predetermined area including a product area and a non-product area, the surface of the color filter can be made flat and the color filter can be made flat. It is possible to provide a color filter substrate with a coating layer for a display device that can suppress the generation of voids due to the step.

In the present invention, the non-product region of the base material has a flattening layer made of the same material as the colored layer on the surface of the first functional layer side, and the non-product area of the flattening layer is the same as the base material. It is preferable that the coating layer is disposed on the opposite surface. This is because a predetermined level difference in the product region and the non-product region of the first functional layer can be filled with the flattening layer.

Furthermore, the present invention provides a laminate including the above-described color filter substrate with a coating layer for a display device and a display panel.

According to the present invention, the color filter substrate with the coating layer for the display device has the coating layer on the surface having the predetermined step including the product region and the non-product region of the color filter, and thus the product region of the color filter and The steps on the surface including the non-product region can be flattened, and the generation of voids due to the steps of the color filter can be suppressed. Therefore, it is possible to obtain a laminate having excellent display characteristics and capable of suppressing the occurrence of defects due to the voids of the color filter substrate with a coating layer for a display device.

Furthermore, the present invention provides a base material, a first functional layer arranged on one surface of the base material, and a surface opposite to the base material of the first functional layer, which is transparent. A method for producing a substrate with a coating layer for a display device, comprising: a substrate having a coating layer having properties, wherein the surface of the first functional layer opposite to the substrate is provided. A coating layer forming step of forming the coating layer, and a polishing step of polishing the surface of the coating layer opposite to the first functional layer after the coating layer forming step, The layered substrate has a product region to be a display device and a non-product region arranged on the outer periphery of the product region, and the product region and the non-product region of the first functional layer are the coating layer side. Has a step difference of 1.5 μm or more, and the coating layer obtained in the coating layer forming step has a thickness corresponding to at least the step difference of the first functional layer on the coating layer side. In the product area and the non-product area of the obtained coating layer, the step on the surface opposite to the first functional layer has a step of 0.1 μm or less. A manufacturing method is provided.

According to the present invention, by including the polishing step of polishing the coating layer after the coating layer forming step, even when the thickness of the coating layer formed in the coating layer forming step is increased, the coating layer is formed in the polishing step. Can be adjusted to a desired thickness. Therefore, by increasing the thickness of the coating layer formed in the coating layer forming step, the predetermined step including the product region and the non-product region of the first functional layer is filled, and the product region and the non-product region of the first functional layer are filled. It is possible to obtain a base material with a coating layer for a display device, which can flatten the level difference on the surface including the above and can suppress the generation of voids due to the level difference on the first functional layer.

Further, the present invention provides a base material, a first functional layer arranged on one surface of the base material, and a surface of the first functional layer opposite to the base material, which is transparent. A method for producing a substrate with a coating layer for a display device for producing a substrate with a coating layer for a display device having a coating layer having, wherein the surface of the first functional layer opposite to the substrate, After the coating layer forming composition arranging step of arranging the coating layer forming composition constituting the coating layer, and the coating layer forming composition arranging step, the coating layer forming composition is treated with the first functional layer. And a coating layer forming step of curing the coating layer forming composition to form the coating layer while pressing the plate from the surface opposite to the above, the substrate with a coating layer for the display device. Has a product region to be a display device and a non-product region arranged on the outer periphery of the product region, and the product region and the non-product region of the first functional layer are steps on the surface on the coating layer side. Is 1.5 μm or more, and the product region and the non-product region of the coating layer obtained in the coating layer forming step have a step difference of 0.1 μm or less on the surface opposite to the first functional layer. There is provided a method for producing a substrate with a coating layer for a display device.

According to the present invention, after the coating layer forming composition arranging step, the coating layer forming composition is pressed by the plate, and the coating layer forming step of curing the coating layer forming composition in that state is performed. The composition for forming a coating layer can be incorporated into every corner of the surface step including the product region and the non-product region of one functional layer. Therefore, it is possible to fill a predetermined step including the product region and the non-product region of the first functional layer to make the step on the surface including the product region and the non-product region of the first functional layer flat, and It is possible to obtain a base material with a coating layer for a display device that can suppress the generation of voids due to the step of the functional layer.

Furthermore, the present invention provides a base material, a first functional layer arranged on one surface of the base material, and a surface of the first functional layer opposite to the base material. And a coating layer having a coating layer, and a substrate having a coating layer for a display device for producing a substrate having a coating layer for a display device having a product region to be a display device and a non-product region arranged on the outer periphery of the product region. A first functional layer preparing step of preparing the first functional layer in the product area, a planarizing layer forming step of forming a planarizing layer in the non-product area, and A coating layer forming step of forming the coating layer on the functional layer and the flattening layer, wherein the product region and the non-product region of the first functional layer have a step on the coating layer side. 1.5 μm or more, and the product region and the non-product region of the coating layer have a step difference of 0.1 μm or less on the surface opposite to the first functional layer, and a substrate with a coating layer. A method for manufacturing a material is provided.

According to the present invention, since the non-product region of the base material has the flattening layer, a predetermined step in the product region and the non-product region of the first functional layer can be filled with the flattening layer, and It is possible to obtain a substrate with a coating layer for a display device that can suppress the generation of voids due to the step.

INDUSTRIAL APPLICABILITY The present invention makes it possible to flatten the uneven shape having a predetermined step on the surface of the functional layer including the product region and the non-product region, and to suppress the generation of voids due to the step of the functional layer. An effect that a substrate with a coating layer for a device can be provided is exhibited.

It is a schematic sectional drawing which shows an example of the base material with a coating layer for display devices of this invention. It is a schematic sectional drawing which shows an example of the 1st functional layer in this invention. It is an outline top view and an outline sectional view showing other examples of the 1st functional layer of the present invention. It is a schematic sectional drawing which shows the other example of the base material with a coating layer for display devices of this invention. It is a schematic sectional drawing which shows the other example of the base material with a coating layer for display devices of this invention. It is a schematic sectional drawing which shows the other example of the base material with a coating layer for display devices of this invention. It is a schematic plan view which shows an example of the laminated body of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the base material with a coating layer for display devices of this invention. It is a schematic process drawing which shows the other example of the manufacturing method of the base material with a coating layer for display devices of this invention. It is a schematic process drawing which shows the other example of the manufacturing method of the base material with a coating layer for display devices of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the conventional laminated body. It is a schematic sectional drawing which shows an example of the conventional laminated body. It is a schematic sectional drawing which shows the other example of the conventional laminated body. It is a schematic plan view and schematic sectional drawing which show an example of the conventional functional layer. It is a schematic sectional drawing which shows the other example of the conventional functional layer.

Hereinafter, a method for manufacturing a substrate with a coating layer for a display device, a color filter substrate with a coating layer for a display device, a laminate, and a substrate with a coating layer for a display device will be described.

A. Base Material with Cover Layer for Display Device The base material with a cover layer for a display device of the present invention includes a base material, a first functional layer disposed on one surface of the base material, and the first functional layer described above. A substrate with a coating layer for a display device, which is disposed on a surface opposite to the substrate and has a transparent coating layer, wherein the substrate with the coating layer for a display device is a product to be a display device. An area and a non-product area arranged on the outer periphery of the product area, and the product area and the non-product area of the first functional layer have a step difference of 1.5 μm or more on the surface on the coating layer side. The product region and the non-product region of the coating layer are members characterized in that the level difference on the surface opposite to the first functional layer is 0.1 μm or less.

The substrate with a coating layer for a display device of the present invention is a member used for a display device. Here, the display device can have the same contents as those described in the section "C. Laminated body" described later, and thus the description thereof is omitted here.

The substrate with a coating layer for a display device of the present invention will be described with reference to the drawings.
1A and 1B are schematic cross-sectional views showing an example of a substrate with a coating layer for a display device of the present invention. FIG. 1A shows, as the first functional layer 2a, a light shielding part 22 having a plurality of openings, and a colored layer 21 arranged in a pattern in the openings (here, a red colored layer 21R and a green colored layer 21G). , A blue colored layer 21B) and a decorative member having a decorative portion 24 are used as an example. Further, FIG. 1B shows, as the first functional layer 2a, a light-shielding portion 22 having a plurality of openings, a frame light-shielding portion 22' arranged on the outer peripheral portion of the display device, and a pattern arranged in the opening. This is an example of the case where a color filter having the colored layer 21 formed is used. As shown in FIGS. 1A and 1B, a substrate 10 with a coating layer for a display device of the present invention includes a substrate 1 and a first functional layer 2a arranged on one surface of the substrate 1. And a transparent coating layer 3 disposed on the surface of the first functional layer 2a opposite to the base material 1. In addition, the substrate 10 with a coating layer for a display device of the present invention has a product region Y to be a display device and a non-product region X arranged on the outer periphery of the product region Y. Further, in the substrate 10 with a coating layer for a display device of the present invention, the product region Y and the non-product region X of the first functional layer 2a have an uneven shape in which the surface on the coating layer 3 side has a predetermined step, and The flattening layer 4 is arranged so as to fill the steps in the product region Y and the non-product region X, and the surface opposite to the first functional layer 2a has a predetermined step or less. Note that FIG. 1B is a sectional view similar to the sectional view taken along the line BB of FIG. 14A described above.

According to the present invention, by providing the coating layer on the surface having the predetermined step including the product region and the non-product region of the first functional layer, the step on the surface of the first functional layer can be made flat, In addition, it is possible to provide a base material with a coating layer for a display device that can suppress the generation of voids due to the step of the first functional layer.
Hereinafter, the above effects of the present invention will be described in detail.

First, as shown in FIGS. 11A and 11B described above, as a method of manufacturing a display device, a laminate having the first functional layer 2a and a laminate having the second functional layer 2b are adhered to each other. There is a method of laminating the layers.
Further, in the case of manufacturing a display device, from the viewpoint of productivity, for example, as shown in FIG. 14A, first, a multi-faced display device is manufactured, and then, the display device is cut into units. There is a way to get it. In a multi-faced display device, there is a product region that will eventually become the display device, and a non-product region that is removed when cut into each unit on the outer periphery of the product region.
Here, a method for manufacturing the multi-faced display device by the above-mentioned bonding method using the adhesive layer will be described. As a method for manufacturing a multi-faced display device by laminating, a multi-faced laminate having a first functional layer and a multi-faced laminate having a second functional layer are adhered to the entire surface of either one of them. A method of arranging the layers and bonding the two laminated bodies via the adhesive layer can be mentioned. In the above method, since the adhesive layer is arranged on the entire surface of either one of the two laminates, the obtained multi-faced display device has the adhesive layer interposed between the product area and the non-product area. As a result, the two laminated bodies are bonded together.
Therefore, in order to flatten the surface to be bonded via the adhesive layer, flatness is required not only in the product region but also in the non-product region.
Further, when the two laminated bodies are bonded together via the adhesive layer, specifically, when other members are bonded to the surface of the base material with the coating layer for the display device on the coating layer side, for example, vacuum adsorption The method may be used. At this time, for example, if there is a gap between the first functional layer and the coating layer, the air contained in the gap may bounce off, causing a problem such as cracking of a member such as a base material during bonding. is there.

On the other hand, in the present invention, by providing the coating layer on the surface including the product region and the non-product region of the first functional layer having a predetermined step, the step on the surface of the first functional layer is filled and the coating layer The surface opposite to the base material can be made flat.
Further, in the present invention, by having a predetermined coating layer, it is possible to suppress the generation of voids that are non-contact areas at the contact interface with the first functional layer, and to prevent problems during bonding by the reduced pressure adsorption method. Generation can be suppressed, and furthermore, generation of voids in the display area of the display device in the product area can be suppressed, so that deterioration in display characteristics can be suppressed.

Hereinafter, the substrate with a coating layer for a display device of the present invention will be described in detail.

1. Coating Layer The coating layer in the present invention is a member that is disposed on the surface of the first functional layer, which will be described later, on the side opposite to the base material and has transparency. Further, in the product region and the non-product region of the coating layer, the step difference is 0.1 μm or less on the surface opposite to the first functional layer. That is, the coating layer in the present invention is a member having a function as a flattening layer that fills a step on the surface of the first functional layer to flatten it.

In the product region and the non-product region of the coating layer in the present invention, the surface on the side opposite to the first functional layer has a step difference of 0.1 μm or less. That is, the surface of the coating layer of the present invention opposite to the first functional layer has a predetermined flatness. Among them, in the present invention, the step difference on the surface of the coating layer on the side opposite to the first functional layer is preferably 0.1 μm or less, more preferably 0.05 μm or less, and particularly preferably It is preferable that there is no step on the surface opposite to the first functional layer. In the present invention, the fact that the level difference on the surface of the coating layer opposite to the first functional layer is within a predetermined range can be confirmed by, for example, observing the cross section of the coating layer. The “step of the coating layer” means a value obtained by subtracting the minimum distance in the thickness direction of the coating layer from the maximum distance in the thickness direction of the coating layer.

The thickness of the coating layer in the present invention can be appropriately adjusted depending on the type of the first functional layer, the use of the substrate with a coating layer for a display device of the present invention, and the like, and is not particularly limited. In the present invention, the thickness is such that the step difference of 1.5 μm or more on the surface of the first functional layer, which will be described later, can be buried and the step difference on the surface of the coating layer can be flattened to be 0.1 μm or less. Preferably.

Specifically, when the first functional layer described later is a color filter, the thickness of the coating layer is preferably, for example, in the range of 0.05 μm or more and 2 μm or less, and more preferably 0.05 μm or more and 1. It is preferably in the range of 5 μm or less, and particularly preferably in the range of 0.05 μm or more and 1 μm or less.

Further, when the first functional layer described later is a decorative member and the decorative portion forming the decorative member is a black decorative portion, the thickness of the coating layer is, for example, 1.0 μm or more 8 It is preferably in the range of not more than 0.0 μm, more preferably in the range of not less than 1.0 μm and not more than 7.5 μm, and particularly preferably in the range of not less than 1.0 μm and not more than 7 μm.

Furthermore, when the 1st functional layer mentioned later is a decoration member and the decoration part which comprises the said decoration member is a white decoration part, the thickness of a coating layer is 5 micrometers or more and 40 micrometers or less, for example. It is preferably in the range, particularly preferably in the range of 5 μm or more and 35 μm or less, and particularly preferably in the range of 5 μm or more and 30 μm or less.

When the thickness of the coating layer is within the above range, the step on the surface of the first functional layer can be filled and flattened, and by providing the coating layer, the substrate with a coating layer for a display device of the present invention Can be prevented from becoming too thick, and an increase in the thickness of the entire display device can be suppressed when the substrate with a coating layer for a display device of the present invention is used in the display device.

Further, in the present invention, by providing the coating layer, it is possible to suppress the generation of voids between the first functional layer and the coating layer due to the step difference on the surface of the first functional layer. The presence or absence of voids in the substrate with a coating layer for a display device of the present invention can be confirmed by the following method. For example, the presence or absence of voids can be confirmed by transferring the second functional layer to the surface of the first functional layer having an uneven shape using an adhesive or an adhesive. Further, by arranging a pressure-sensitive adhesive made of an ultraviolet curable resin on the surface of the first functional layer having an uneven shape, exposing and curing the pressure-sensitive adhesive, and then measuring with a contact-type film thickness meter, The flatness of the surface can be confirmed by forming the covering member on the surface of the functional layer having the uneven shape.

The coating layer in the present invention is a member having transparency. Here, “having transparency” can be defined as follows according to the type of the first functional layer in which the coating layer is arranged.
For example, as shown in FIG. 1A, a color filter is used as the first functional layer 2a, and the display region of the display device using the base material with the display device coating layer of the present invention is on the color filter. When the coating layer 3 is formed in the region corresponding to, it means that the coating layer 3 is transparent to the extent that the operator of the display device does not hinder visual recognition from the operation surface. Therefore, “transparent” includes colorless and transparent, and colored and transparent to the extent that the operator of the display device does not hinder the visibility from the operation surface, and is not defined by strict transmittance, and therefore, for the display device of the present invention. The degree of permeability can be determined according to the application of the substrate with the coating layer and the like.

Examples of the material of the coating layer in the present invention include an ionizing radiation curable resin composition, a thermosetting resin composition and a thermoplastic resin composition, and among them, an ionizing radiation curable resin composition is preferable. ..

Here, the "ionizing radiation curable resin composition" refers to a resin that is cured by irradiation with ionizing radiation. “Ionizing radiation” refers to an electromagnetic wave or charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule. For example, in addition to ultraviolet rays and electron beams, visible light rays, X-rays, γ-rays and other electromagnetic waves. , Charged particle beams such as α rays.

Examples of the ionizing radiation curable resin composition include monomers, prepolymers and oligomers that are cured by ionizing radiation. Examples of the monomers, prepolymers and oligomers include ionizing radiation curable resins used in the primer layer described in Japanese Patent No. 4436441. The monomers and prepolymers may be used alone or in combination of two or more, or the monomers and prepolymers may be mixed and used.

Examples of the thermosetting resin composition include epoxy resin, phenol resin, melamine resin, unsaturated polyester resin, urea resin and the like.

Examples of the thermoplastic resin composition include acrylic resins such as polymethylmethacrylate, vinyl chloride-vinyl acetate copolymers, polyester resins, and polyolefin resins.

The method for forming the coating layer in the present invention is preferably a method that can be formed so as to fill the step on the surface of the first functional layer and can sufficiently obtain the effects of the present invention. For example, it is preferable to form the coating layer by applying a coating layer-forming composition having fluidity onto the stepped surface of the first functional layer. By using a fluid material as the coating layer-forming composition forming the coating layer, the coating layer-forming composition enters the step on the surface of the first functional layer, and the first functional layer and the coating layer come into contact with each other. It is possible to suppress the generation of voids that are non-contact areas at the interface.

Here, “having fluidity” means that when the coating layer forming composition is applied to the stepped surface of the first functional layer, the coating layer forming composition enters the corners of the step and At the contact interface between the functional layer and the coating layer, it means that it is possible to suppress the generation of voids that are non-contact areas. Specifically, it is preferable that the value measured with a rotary viscometer is, for example, 10 mPa·s or less under the condition of room temperature of 23° C. or less.

The coating layer-forming composition having fluidity used in the present invention preferably contains, for example, a solvent. From the viewpoint of imparting sufficient fluidity to the coating layer forming composition, the content of the solvent contained in the coating layer forming composition is preferably appropriately adjusted according to the ratio of the solid content. For example, the solid content in the coating layer forming composition is preferably in the range of 5% by mass or more and 30% by mass or less, and more preferably in the range of 6% by mass or more and 28% by mass or less, In particular, it is preferably in the range of 7% by mass or more and 26% by mass or less.

When forming the coating layer in the present invention, the method for applying the coating layer forming composition to the stepped surface of the first functional layer may be, for example, a spin coating method, a roll coating method, a die coating method, or a spray coating method. Known coating methods such as a coating method and a bead coating method can be used. The specific method for forming the coating layer is described in the section “D. Method for manufacturing a substrate with a coating layer for a display device” described later, and thus the description thereof is omitted here.

2. First Functional Layer The first functional layer in the present invention is disposed on one surface of the base material, and the product area and the non-product area of the first functional layer have a step difference of 1.5 μm or more on the surface on the coating layer side. It is a certain member. The “step of the surface of the first functional layer” means the thickness from the surface of the base material to the surface of the first functional layer from the maximum distance in the thickness direction from the surface of the base material to the surface of the first functional layer. It means the value obtained by subtracting the minimum distance to the direction. For example, it refers to a distance indicated by reference numeral t in FIGS. 1A, 2A and 3B described later, or a distance indicated by reference numerals t ₁ and t ₂ in FIG. 2B.

The first functional layer in the present invention can be appropriately selected according to the application of the substrate with a coating layer for a display device of the present invention. For example, when the substrate with a coating layer for a display device of the present invention is used for a display device, a color filter, a decorating member, a touch panel, or the like can be used for the first functional layer, and among them, the color filter or the decorating member can be used. The member can be preferably used. Further, as the first functional layer in the present invention, one functional layer described above may be used, or a plurality of functional layers may be laminated and used.

When the first functional layer in the present invention is a color filter, the step difference on the surface of the first functional layer may be a difference between the thickness of the light shielding portion 22 and the thickness of the colored layer 21, as shown in FIG. The difference in height indicated by t can be obtained. Further, as shown in FIG. 2B, the height t indicated by reference numeral t ₁ corresponding to the thickness of the frame light-shielding portion 22 ′, or the reference numeral t generated by the difference between the thickness of the light-shielding portion 22 ′ and the colored layer 21. _The height difference can be represented by ₂ . When the first functional layer in the present invention is a color filter, the specific step difference on the surface of the first functional layer is preferably in the range of, for example, 1.5 μm or more and 6.0 μm or less, and particularly 1. It is preferably in the range of 7 μm or more and 5.5 μm or less, and particularly preferably in the range of 1.9 μm or more and 5.0 μm or less. In the present invention, in the case where the first functional layer is a color filter, in the present invention, a step caused by the difference between the thickness of the light-shielding portion or the frame light-shielding portion and the thickness of the colored layer, or the frame light-shielding It is possible to fill a step between the surface of the base material and the surface of the frame light-shielding portion, which corresponds to the thickness of the portion, to flatten it.

When the first functional layer in the present invention is a decorative member, the step on the surface of the first functional layer is formed with the decorative portion 24 as shown in FIGS. 3A and 3B, for example. The difference in height indicated by t can be obtained. Note that FIG. 3A is a schematic plan view showing an example of the decorating member provided with multiple faces, and FIG. 3B is a cross-sectional view taken along the line CC of FIG. 3A. In the present invention, as shown in FIGS. 3A and 3B, the step on the surface of the decorative member may be a step generated on the display region D side of the decorative portion 24, or the decorative portion. It may be a step generated on the non-display area N side of 24. When the first functional layer in the present invention is a decorative member, the specific step difference on the surface of the first functional layer is preferably in the range of 1.0 μm or more and 40 μm or less, and particularly 1.1 μm. It is preferably in the range of not less than 35 μm and particularly preferably in the range of not less than 1.2 μm and not more than 30 μm. Therefore, when the first functional layer is a decorative member, the present invention has an effect of being able to fill and flatten the step caused by the arrangement of the decorative portion as described above.

Hereinafter, the first functional layer will be described by taking a color filter and a decorative member as an example.

(1) Color Filter The color filter according to the present invention has a light-shielding portion having a plurality of openings and a colored portion arranged in the openings.
Hereinafter, each member constituting the color filter will be described.

(A) Light-shielding portion The light-shielding portion in the present invention is a member arranged on a base material and having a plurality of openings.

The light-shielding portion in the present invention is a member that is arranged in parallel so as to extend in the first direction and the second direction intersecting the first direction and defines the opening. Examples of the plan view shape of the opening include a rectangular shape. Further, the width of the opening in the light shielding part can be the same as the width of the opening in the light shielding part in a general color filter, and therefore the description thereof is omitted here.

The line width of the light-shielding portion in the present invention can be appropriately selected depending on the application of the color filter substrate of the present invention and is not particularly limited, but is preferably in the range of 1 μm or more and 30 μm or less, for example. Above all, it is preferably in the range of 1.5 μm or more and 28 μm or less, and particularly preferably in the range of 2 μm or more and 25 μm or less. When the line width of the light-shielding portion is within the above range, the opening can be sufficiently defined and a high-definition color filter substrate can be obtained. When the line width of the light shielding portion is not constant, it is preferable that the line width of the light shielding portion is all within the above range.

The thickness of the light shielding portion in the present invention is not particularly limited as long as it has a thickness capable of exhibiting a desired light shielding property, and is appropriately adjusted according to the material used for the light shielding portion. The specific thickness of the light-shielding portion in the present invention may be, for example, in the range of 0.5 μm or more and 3.0 μm or less.

The constituent material of the light shielding portion in the present invention is not particularly limited as long as it is a material that can exhibit a desired light shielding property. Specifically, the light-shielding portion is usually a cured product of a binder resin containing a black color material, but it may contain a colored color material as necessary in addition to the black color material. Note that the specific constituent material of the light-shielding portion can be the same as that of the light-shielding portion used for a general color filter, and thus the description thereof is omitted here.

The light-shielding portion in the present invention may contain other materials, if necessary, in addition to the constituent materials described above. Examples of other materials include photopolymerization initiators, sensitizers, coatability improvers, crosslinking agents, polymerization inhibitors, plasticizers, flame retardants, and the like.

(B) Frame light-shielding portion The frame light-shielding portion in the present invention is a member arranged so as to cover the outer peripheral portion of the display device on which the wiring and the like are arranged.

Examples of the planar shape of the frame light-shielding portion in the present invention include a shape that covers the outer peripheral portion of the display device when the substrate with a coating layer for a display device of the present invention is used in the display device. The line width and the detailed design of the frame light-shielding portion are not particularly limited because they can be appropriately adjusted depending on the application of the substrate with a coating layer for a display device of the present invention. Note that the thickness and material of the frame light-shielding portion can be the same as those described in the above-mentioned section "(a) Light-shielding portion", and thus the description thereof is omitted here.

(C) Colored layer The colored layer in the present invention is a member arranged in the opening formed by the light shielding part.

In the present invention, for example, there are colored layers of three colors of red, green and blue. The color of the colored layer may include at least three colors of red, green and blue, and for example, three colors of red, green and blue, four colors of red, green, blue and yellow, or red, It is also possible to use five colors such as green, blue, yellow, and cyan.

The thickness of the colored layer in the invention can be the same as the thickness of the colored layer used in a general color filter, and can be set, for example, in the range of 1 μm to 5 μm.

As the coloring layer, for example, a material in which a coloring material is dispersed in a binder resin can be used. Examples of the color material used in the colored layer include pigments and dyes of each color. Examples of the coloring material used in the red colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Examples of the coloring material used in the green colored layer include phthalocyanine-based pigments such as halogen poly-substituted phthalocyanine pigments or halogen poly-substituted copper phthalocyanine pigments, triphenylmethane-based basic dyes, isoindoline-based pigments, isoindolin. Examples thereof include linone-based pigments. Furthermore, examples of the coloring material used in the blue colored layer include a copper phthalocyanine pigment, an anthraquinone pigment, an indanthrene pigment, an indophenol pigment, a cyanine pigment, and a dioxazine pigment. These pigments and dyes may be used alone or in combination of two or more. Examples of the binder resin used in the colored layer include a photosensitive resin having a reactive vinyl group such as an acrylate type, a methacrylate type, a polyvinyl cinnamate type, or a cyclized rubber type.

In the colored layer, in addition to the above materials, if necessary, a photopolymerization initiator, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. Can be included.

Further, a white layer containing no binder and containing a binder resin may be formed on the same plane where the colored layer is formed.

(D) Alignment mark The alignment mark in the present invention is arranged in the non-product region X between the adjacent frame light-shielding portions 22' when the frame light-shielding portion 22' is provided, for example, as shown in Fig. 1(b). It is a member that can be. When the first functional layer in the present invention has an alignment mark, the coating layer is formed so as to cover the alignment mark. However, since the coating layer in the present invention has a predetermined transparency, the alignment mark is provided via the coating layer. Can be read. Further, as shown in FIG. 1B, the flattening layer 4 may be arranged in the non-product region X, and when the alignment mark is arranged in the non-product region X, the alignment mark is covered. A flattening layer is formed on the substrate, and the alignment mark can be read by using the flattening layer having a predetermined transparency.

The alignment mark in the present invention can be the same as that generally used. Specifically, for example, the content can be the same as that described in Japanese Patent Laid-Open No. 2005-125322, and thus the description here is omitted.

(2) Decorative member The decorative member in the present invention is a member having a decorative portion in a region corresponding to a frame portion of a display device, for example.

The thickness of the decorative portion in the present invention can be appropriately adjusted according to the application of the display device using the substrate with the coating layer for a display device of the present invention, and should be the same as a general decorative portion. Therefore, the description thereof is omitted here.

The color exhibited by the decorative portion in the present invention can be appropriately selected according to the design of the display device and the like. When the decoration portion is a black decoration portion that exhibits a black color, the constituent material of the black decoration portion can be the same as the constituent material of the light shielding portion described above, and thus the description thereof is omitted here. Further, when the decorative portion is a white decorative portion exhibiting a white color, examples of the constituent material of the white decorative portion include titanium oxide, silica, talc, kaolin, clay, barium sulfate, calcium hydroxide and the like. ..

(3) Other members The first functional layer in the present invention may have other members, if necessary, in addition to the color filter and the decorative member described above. Other members are not particularly limited as long as the surface of the first functional layer has a predetermined uneven shape. Examples of other members include an antireflection layer and a protective layer arranged so as to cover the color filter and the decorative member.

When the decorative member and the color filter are laminated in order from the base material side as the first functional layer, an adhesive layer for bonding the decorative member and the color filter is used as the other member. Can be mentioned.
Hereinafter, the antireflection layer, the protective layer and the adhesive layer will be described.

(A) Antireflection Layer The antireflection layer in the present invention can be arranged on the surface of the color filter used as the first functional layer or the decorative member on the base material side. By disposing the antireflection layer, it is possible to suppress the reflection of external light on the surface of the base material with the coating layer for a display device of the present invention, and it is possible to improve the visibility.

As the material forming the antireflection layer of the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility. Specific examples thereof include materials that can be used for a general antireflection layer, so description thereof will be omitted here.

The thickness of the antireflection layer may be such that, for example, the antireflection function as the antireflection layer can be exhibited, and the substrate with the coating layer for a display device of the present invention can be used in a display device. preferable. Note that the specific thickness of the antireflection layer can be appropriately adjusted according to the material forming the antireflection layer, and thus the description thereof is omitted here.

(B) Protective Layer The protective layer in the present invention can be arranged so as to cover the surface of the color filter used as the first functional layer or the surface of the decorative member opposite to the base material. By disposing the protective layer, it becomes possible to enhance the protective function of the first functional layer in the present invention.

As a material forming the protective layer in the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility. For example, a resin material that can be used for a general protective layer is mentioned, and among them, a resin material having heat resistance and scratch resistance is preferable. Specific examples include epoxy resin, acrylic resin, and polyimide resin.

The thickness of the protective layer is preferably such that, for example, a protective function as the protective layer can be exhibited, and an uneven shape appears on the surface of the first functional layer. Specifically, it is preferably within the range of 1 μm to 5 μm, for example.

(C) Adhesive Layer The adhesive layer in the present invention can be arranged between the decorative member and the color filter when the decorative member and the color filter are laminated and used as the first base material. By disposing the adhesive layer, it becomes possible to easily attach the decorative member and the color filter. In this case, the color filter may be configured to have a transparent base material, and a colored layer and a light shielding portion arranged on the transparent base material. The transparent base material used for the color filter can be the same as the base material described later, and thus the description thereof is omitted here.

As a material forming the adhesive layer in the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility like the decorative portion. Specifically, a general material such as a photocurable resin or a thermosetting resin can be used.

The thickness of the adhesive layer is preferably such that the substrate with a coating layer for a display device of the present invention can be used in a display device.

3. Planarizing Layer In the present invention, the non-product region of the base material described later has a planarizing layer having the same material as the first functional layer on the surface on the first functional layer side, and the base material of the planarizing layer. A coating layer is preferably arranged on the surface opposite to the surface.

The flattening layer preferably has a function of filling a step between the first functional layer arranged in the product region of the base material and the non-product region. Therefore, it is preferable that the flattening layer is arranged at least in the non-product region of the base material. For example, as shown in FIG. 1B, a part of the product region Y and the non-product region X of the base material 1a are formed. May be arranged so as to cover. Note that the description of FIG. 1B can be omitted because it can be similar to the above description.

The flattening layer may or may not be transparent. For example, when identification information such as an alignment mark or a product number is formed in the non-product area of the base material, the flattening layer is arranged so as to cover the alignment mark or the product number on the base material. .. Therefore, in this case, the flattening layer preferably has a predetermined transparency. The term "transparent" as used herein includes colorless and transparent, and colored transparent to the extent that it does not hinder the visibility of alignment marks, product numbers, etc. arranged in the non-product area, and is not defined by strict transmittance. The degree of transparency can be determined according to the intended use of the substrate with a coating layer for a display device, etc.

When the flattening layer in the present invention is formed in the non-product region, specifically, as shown in FIG. 1B, the flattening layer is formed so as to fill the step in the product region Y and the non-product region X. When the functionalized layer 4 is formed, the same material as the first functional layer 2 a can be used as the material of the planarization layer 4. In FIG. 1B, the flattening layer 4 is formed so as to fill the step formed between the surface of the frame light-shielding portion 22 ′ in the product region Y and the surface of the base material 1 a in the non-product region X. This is an example, and the same material as the colored layer 21 used for the color filter is used as the material of the flattening layer 4 here.

When the flattening layer is formed so as to fill the step in the product region and the non-product region, and when the same material as the first functional layer is used as the material of the flattening layer, a specific flattening layer The material is preferably the same material as any of the members forming the first functional layer. This is because the flattening layer can be formed at the same time when the first functional layer is formed, and an increase in the number of manufacturing steps can be suppressed. Further, in the present invention, for example, when identification information such as an alignment mark or a product number is arranged on the surface of the base material in the non-product region on the side of the coating layer, the material of the coating layer is the same as that of the first functional layer. Of these materials, it is preferable to select a material having higher transparency. Therefore, for example, as shown in FIG. 1B, when the material of the flattening layer 4 is the same as the material of the colored layer 21, the colored layer 21 having higher transparency is used among the colored layers 21 used for the color filter. It is preferable to select the same material as the colored layer 21. Therefore, as shown in FIG. 1B, when the colored layer 21 includes the red colored layer 21R, the green colored layer 21G and the blue colored layer 21B, the green colored layer 21G having higher transmittance should be selected. Is preferred. This is because when the alignment mark, the product number, or the like is formed in the non-product region, the alignment mark, the product number, or the like can be satisfactorily read through the flattening layer. The material of the colored layer is described in the above section “2. First functional layer (1) Color filter”, and thus the description thereof is omitted here.

The thickness of the flattening layer in the present invention can be appropriately adjusted according to the step difference in the product region and the non-product region to be filled with the flattening layer, and is not particularly limited. When the planarizing layer is formed simultaneously with the first functional layer, it can have the same thickness as the first functional layer formed simultaneously.

Examples of the method of forming the planarizing layer in the present invention include a method of applying the composition for planarizing layer forming the planarizing layer so as to fill the step between the product region and the non-product region. Examples of the method for applying the composition for forming a planarizing layer include known application methods such as spin coating, roll coating, die coating, spray coating, and bead coating. When the flattening layer is made of the same material as the first functional layer and is formed at the same time, the flattening layer can be formed by the same forming method as that of the first functional layer.

4. Base Material The base material in the present invention is a member that supports the first functional layer and the covering member described above.

The base material in the present invention is usually a transparent base material having transparency.
Here, unless otherwise specified, the term “transparent” means that the operator of the display device using the substrate with a coating layer for a display device of the present invention does not hinder visual recognition from the operation surface. Refers to transparency. Therefore, “transparent” includes colorless and transparent and colored and transparent to the extent that visibility is not hindered, and is not defined by strict transmittance, and it depends on the use of the substrate with a coating layer for a display device of the present invention. The degree of transparency can be determined.

The thickness of the substrate in the present invention is not particularly limited as long as it is a thickness that can support each member, and can be appropriately designed according to the application of the substrate with a coating layer for a display device of the present invention. The specific thickness of the base material can be the same as the thickness of the base material used in a general display device, and thus the description thereof is omitted here.

As the material of the base material in the present invention, the same material as the base material used in a general display device can be used, and for example, a flexible glass material such as quartz glass, Pyrex (registered trademark) glass, or synthetic quartz plate can be used. Inorganic substrates, and flexible resin substrates such as transparent resin films and optical resin plates can be used. Above all, a resin substrate is preferably used, and among the resin substrates, a polyethylene terephthalate (PET) substrate is preferably used. This is because flexibility can be imparted to the phase difference adjusting substrate.

5. Second Functional Layer The substrate with a coating layer for a display device of the present invention has a second functional layer disposed on the surface of the coating layer opposite to the first functional layer via an adhesive layer. Is also good.

The second functional layer used in the present invention can be appropriately selected depending on the type of the first functional layer described above and the use of the substrate with a coating layer for a display device of the present invention. Hereinafter, an aspect in which the first functional layer in the present invention is a color filter (first aspect), an aspect in which the first functional layer is a decorative member (second aspect), and a first functional layer is a color filter and decorative The description will be made separately for the aspect (third aspect) that is a member.

(1) First Mode This mode is a mode in which the first functional layer is a color filter.

FIG. 4A is a schematic cross-sectional view showing an example of a substrate with a coating layer for a display device of this aspect. As shown in FIG. 4A, in the base material 10 with a coating layer for a display device of the present embodiment, the first functional layer 2 a is a color filter having a colored layer 21 and a light shielding portion 22, and the first functional layer 2 a is a color filter having the first coating layer 3. In this embodiment, the second functional layer 2b is provided on the surface opposite to the first functional layer 2a. Note that the reference numerals not described can be the same as those in FIG. 1A, and thus the description thereof is omitted here. In addition, in the substrate with the coating layer for a display device shown in FIGS. 4A to 4C, the non-product region is not shown for the sake of simplification of the drawing. Note that the non-product region of the substrate with a coating layer for a display device shown in FIGS. 4A to 4C can be the same as in FIGS. 1A and 1B.

The second functional layer in this aspect can be appropriately selected according to the application of the substrate with the coating layer for a display device in this aspect. For example, when the base material with the coating layer for a display device of this aspect is used for a display device, a touch panel, an optical functional layer, or the like can be used as the second functional layer.
Hereinafter, the touch panel and the optical functional layer will be described.

(A) Touch panel The touch panel in this aspect has at least sensor electrodes. Further, the touch panel usually has an insulating layer arranged so as to cover the sensor electrode.

FIG. 4B is a schematic cross-sectional view showing another example of the base material with a coating layer for a display device of this embodiment. As shown in FIG. 4B, the touch panel according to this aspect includes the sensor electrode 25 and the insulating layer 26 arranged to cover the sensor electrode 25. Note that the reference numerals not described can be the same as those in FIG. 4A, and thus the description thereof is omitted here.

As the touch panel in this aspect, for example, a resistance film type, an electrostatic capacitance type, an optical type, an electromagnetic induction type, an ultrasonic type, or the like can be used.

(I) Sensor Electrode The sensor electrode in this aspect is a member used for detecting the position of the touch panel.

The sensor electrode in this embodiment may be a transparent conductive layer having transparency, and may be, for example, a mesh-shaped mesh electrode formed of thin wires as shown in FIG. In the present aspect, when the sensor electrode is a mesh-shaped mesh electrode made of fine wires, it is possible to make the sensor electrode apparently transparent even if the material used for the sensor electrode is an opaque metal material.

When the sensor electrode in this aspect is a transparent conductive layer, the thickness of the sensor electrode and the like can be appropriately adjusted according to the application of the phase difference adjusting substrate obtained in this aspect, and is similar to a general sensor electrode. Therefore, the description here is omitted.
Further, when the sensor electrode in this aspect is a mesh electrode, the thickness, line width, pitch, aperture ratio, etc. of the sensor electrode may be appropriately adjusted according to the application of the phase difference adjusting substrate obtained in this aspect. Since it can be made the same as a general sensor electrode, the description thereof is omitted here.

When the sensor electrode is a transparent electrode layer, for example, a transparent conductive material such as tin oxide, indium tin oxide called ITO, and indium zinc oxide called IZO is used as the constituent material of the sensor electrode in this embodiment. be able to.
When the sensor electrode in this embodiment is a mesh electrode composed of an opaque metal material, the metal material may be, for example, a simple substance of silver, gold, copper, chromium, platinum, or aluminum, or any one of them. And the like. As the metal alloy, an alloy of silver, palladium, copper, or the like called APC can be used. Furthermore, as the metal composite, a three-layer structure of molybdenum, aluminum, molybdenum referred to as MAM, or the like can be applied. Further, a conductive polymer obtained by adding the above metal to a resin layer forming composition such as PEDOT can also be used.

(Ii) Insulating Layer The insulating layer in this aspect is a member that can be used when insulating the above-mentioned sensor electrode.

The insulating layer in this aspect is usually arranged so as to cover the sensor electrode. The thickness of the insulating layer is
The thickness is preferably such that the sensor electrode can be insulated to prevent a short circuit, and can be appropriately adjusted according to the design of the sensor electrode. For example, the thickness of the insulating layer can be in the range of 0.5 μm to 3 μm.

The constituent material of the insulating layer in this embodiment is preferably a material having a desired insulating property, and a material generally used for a touch panel can be used. Specific examples thereof include insulating resin materials such as polyimide resin, acrylic resin, cardo resin, epoxy resin, and melamine resin, and inorganic materials such as glass. The constituent materials used for the insulating layer may be used alone or in combination of two or more kinds. The layer structure of the insulating layer may be a single layer or a multilayer including two or more layers.

(Iii) Transparent Substrate The touch panel according to this embodiment may have a transparent substrate as needed to support the sensor electrode on the surface on the coating layer side. The transparent base material in this embodiment can be the same as the content described in the above section “3. Base material”, and thus the description thereof is omitted here.

(B) Optical functional layer The optical functional layer in this embodiment is a member having a retardation layer in which a liquid crystal material is fixed.

FIG. 4C is a schematic cross-sectional view showing another example of the substrate with a coating layer for a display device of this aspect. The optical functional layer in this embodiment has an alignment layer 27 and a retardation layer 28, as shown in FIG. Note that the reference numerals not described can be the same as those in FIG. 4A, and thus the description thereof is omitted here.
Hereinafter, the retardation layer and the alignment layer included in the optical functional layer will be described separately.

(I) Retardation Layer The retardation layer in this embodiment is a member that constitutes the optical function layer, and is a member to which a liquid crystal material is fixed.

The retardation layer in this embodiment is a member containing a liquid crystal material, and the liquid crystal material is preferably in an array state capable of imparting desired optical characteristics to the optical functional layer. Examples of the specific alignment state of the liquid crystal material include a state in which the liquid crystal material is aligned in the length direction of the retardation layer and a state in which the liquid crystal material is aligned in the thickness direction of the retardation layer. The former liquid crystal structure is referred to as a homogeneous structure (parallel alignment structure), and by having such a structure, it is possible to optically impart the property as an A plate to the optical functional layer. Further, the latter liquid crystal structure is called a homeotropic structure (vertical alignment structure), and by having such a structure, it is possible to give the optically functional layer a property as an optically positive C plate. Furthermore, the alignment state of the liquid crystal material may be a cholesteric alignment state in which the liquid crystal material exhibits a regular spiral structure. By having such an arrangement state, it is possible to give the optically functional layer a property as an optically negative C plate.

The thickness of the retardation layer constituting the optical functional layer can be appropriately adjusted according to the type of liquid crystal material and the optical characteristics to be imparted to the optical functional layer, and is not particularly limited. For example, it is preferable that the retardation layer is formed within a range corresponding to an in-plane retardation of λ/4. The in-plane retardation value of the retardation layer is, for example, preferably in the range of 100 nm to 160 nm, more preferably in the range of 110 nm to 150 nm, and further preferably in the range of 120 nm to 140 nm. .. When the thickness of the retardation layer is set to a distance within a range where the in-plane retardation of the retardation layer corresponds to λ/4 minutes, the specific distance is determined by the retardation layer described later. It can be appropriately determined according to the type of liquid crystal material included. For example, when a general liquid crystal material is used, the thickness of the retardation layer can be set in the range of 0.5 μm to 2 μm.

The retardation layer that constitutes the optical functional layer serves as a member that transmits light emitted from a light source when the base material with a coating layer for a display device of the present embodiment is used in, for example, a display device. Therefore, the retardation layer in this embodiment preferably has a predetermined transparency. Here, the term “transparent” means being transparent to the extent that light emitted from a light source is transmitted, unless otherwise specified. The specific transmittance of the retardation layer can be the same as that of the retardation layer used for a general optical function layer, and thus the description thereof is omitted here.

The liquid crystal material contained in the retardation layer is not particularly limited as long as it is a material that can impart desired optical functionality to the retardation layer. Among them, a liquid crystal material exhibiting photosensitivity is preferable, and a liquid crystal material exhibiting a nematic phase is particularly preferably used. This is because nematic liquid crystals can be regularly arranged more easily than liquid crystal materials showing other liquid crystal phases. Note that the specific material used for the retardation layer can be the same as the material used for the general retardation layer, and thus the description thereof is omitted here.

(Ii) Alignment Layer The optical functional layer in the present embodiment may or may not have an alignment layer. In the present embodiment, it is preferable not to have the alignment layer from the viewpoint of light transmittance. The alignment layer is a member having an alignment function. The alignment function is a function provided by, for example, a photo-alignment method or a rubbing method. When the photo-alignment method is used, the alignment layer preferably contains a photo-alignment material.
Hereinafter, as an example of the alignment layer, an alignment layer provided with an alignment function by a photo-alignment method will be described. The alignment layer provided with the alignment function by the rubbing method can be the same as a general one, and thus the description thereof is omitted here.

Here, the "photo-alignment material" contained in the alignment layer refers to a material that can exhibit an alignment regulating force by a photo-alignment method. Further, the “photo-alignment method” is a method in which the alignment layer is exposed to light (polarized light) having an arbitrary polarization state so that the alignment layer exhibits an alignment regulating force (anisotropy). Therefore, the photo-alignment material in this embodiment can be said to be a material capable of exhibiting the alignment regulating force by irradiating polarized light. Furthermore, the "alignment regulating force" means an interaction for aligning the liquid crystal compounds contained in the above-mentioned optical functional layer.

The thickness of the alignment layer in this embodiment can be adjusted according to the constituent material. The thickness of the alignment layer in this embodiment is, for example, preferably in the range of 0.01 μm to 0.5 μm, more preferably in the range of 0.02 μm to 0.1 μm, and particularly preferably 0.03 μm to 0 μm. It is preferably within the range of 0.05 μm. When the thickness of the alignment layer in this embodiment is within the above range, a desired alignment regulating force can be exhibited for the liquid crystal compound contained in the above-mentioned optical functional layer.
The thickness of the alignment layer in this embodiment can be measured, for example, by observing the cross section using a scanning electron microscope (SEM).

The alignment layer in this embodiment serves as a member that transmits light emitted from a light source when the substrate with a coating layer for a display device in this embodiment is used in a display device. Therefore, the alignment layer in this embodiment preferably has a predetermined transparency. Here, the term “transparent” means being transparent to the extent that light emitted from a light source is transmitted, unless otherwise specified. The specific transmittance of the alignment layer may be the same as that of a general alignment layer, and thus the description thereof is omitted here.

The alignment material contained in the alignment layer is not particularly limited as long as it is a material that can exhibit the alignment regulating force by irradiation with polarized light. Such photo-alignment materials include photo-isomerization materials that change only the molecular shape by cis-trans change to reversibly change the alignment control force, and photo-reactive materials that change the molecules themselves by irradiating polarized light. Can be roughly divided into In this embodiment, either a photoisomerization material or a photoreactive material can be preferably used, but a photoreactive material is more preferably used.
Since the photoreactive material expresses an alignment regulating force by reacting molecules when irradiated with polarized light, it becomes possible to irreversibly develop the alignment regulating force. Therefore, the photo-reactive material is superior in alignment regulating force and stability over time.

Photoreactive materials can be further sorted by the type of reaction that occurs with polarized irradiation. Specifically, a photodimerization-type material that develops an alignment control force by causing a photodimerization reaction, a photocoupling material that develops an alignment control force by causing a photolysis reaction, and a photolysis reaction and a photocoupling reaction Can be divided into photo-decomposition-bonding type materials and the like that exhibit orientation regulating force. In this embodiment, any of the photoreactive materials described above can be preferably used, but among them, the photodimerization type material is preferably used from the viewpoint of stability, reactivity (sensitivity) and the like.

The photo-alignment material used in this embodiment may be only one kind or two or more kinds.

(C) Other members The second functional layer in the present aspect may include other materials, if necessary, in addition to the touch panel and the optical functional layer described above. Examples of other members include an adhesive layer and a protective layer. The adhesive layer and the protective layer can be the same as the contents described in the above section “2. First functional layer (3) Other members”, and therefore description thereof is omitted here.

(2) Second Mode This mode is a mode in which the first functional layer is a decorative member.

FIG. 5A is a schematic cross-sectional view showing an example of the substrate with a coating layer for a display device of this embodiment. As shown in FIG. 5A, in the display device-attached base material 10 for a display device, the first functional layer 2 a is a decorative member having a decorative portion 24, and the first function of the covering portion 3 is provided. This is a mode in which the second functional layer 2b is provided on the surface opposite to the layer 2a. Note that reference numerals not described can be the same as those in FIGS. 1A and 1B, and thus description thereof is omitted here.

The second functional layer in this aspect can be appropriately selected according to the application of the substrate with the coating layer for a display device in this aspect. For example, when the base material with the coating layer for a display device of the present aspect is used for a display device, a color filter, a touch panel, or the like can be used as the second functional layer.
Hereinafter, the color filter and the touch panel will be described.

(A) Color filter The color filter in this embodiment has at least a coloring layer. In addition, the color filter usually has a light shielding portion having an opening.

FIG. 5B is a schematic cross-sectional view showing another example of the base material with a coating layer for a display device of this embodiment. As shown in FIG. 5B, the color filter according to this aspect includes a light shielding portion 22 having an opening and a colored layer 21 arranged in the opening. Note that the reference numerals not described can be the same as those in FIG. 5A, so description thereof will be omitted here.

The color filter in this embodiment can be the same as the content described in the above section “2. First functional layer (1) Color filter”, and therefore description thereof is omitted here.

(B) Touch panel The touch panel in this aspect has at least a sensor electrode. Further, the touch panel usually has an insulating layer arranged so as to cover the sensor electrode.

FIG. 5C is a schematic cross-sectional view showing another example of the substrate with a coating layer for a display device of this embodiment. As shown in FIG. 5C, the touch panel according to this aspect includes a sensor electrode 25 and an insulating layer 26 arranged to cover the sensor electrode 25. Note that the reference numerals not described can be the same as those in FIG. 5A, and thus the description thereof is omitted here.

The touch panel in this aspect can be the same as the content described in the above section “4. Second functional layer (1) First aspect (a) Touch panel”, and therefore the description thereof is omitted here.

(C) Other members The second functional layer in this aspect may include other materials, if necessary, in addition to the above-described color filter and touch panel. Examples of other members include an adhesive layer and a protective layer. The adhesive layer and the protective layer can be the same as the contents described in the above section “2. First functional layer (3) Other members”, and thus the description thereof is omitted here.

(3) Third Mode This mode is a mode in which the first functional layer is a color filter and a decorative member.

FIG. 6A is a schematic cross-sectional view showing an example of a substrate with a coating layer for a display device of this aspect. As shown in FIG. 6A, in the base material 10 with a cover layer for a display device of the present embodiment, the first functional layer 2a includes a decorative member having a decorative portion 24, a colored layer 21 and a light shielding portion 22. The color filter has the second functional layer 2b on the surface of the coating layer 3 opposite to the first functional layer 2a. Note that the reference numerals not described can be the same as those in FIG. 1A, and thus the description thereof is omitted here.

The second functional layer in this aspect can be appropriately selected according to the application of the substrate with the coating layer for a display device in this aspect. For example, when the base material with the coating layer for a display device of this aspect is used for a display device, a touch panel, an optical functional layer, or the like can be used as the second functional layer.
Hereinafter, the touch panel and the optical functional layer will be described.

(A) Touch panel The touch panel in this aspect has at least sensor electrodes. Further, the touch panel usually has an insulating layer arranged so as to cover the sensor electrode.

FIG.6(b) is a schematic sectional drawing which shows the other example of the base material with a coating layer for display devices of this aspect. As shown in FIG. 6B, the touch panel according to this aspect includes a sensor electrode 25 and an insulating layer 26 arranged to cover the sensor electrode 25. Note that reference numerals not described can be the same as those in FIG. 6A, and thus description thereof is omitted here.

The touch panel in this aspect can be the same as the content described in the above section “4. Second functional layer (1) First aspect (a) Touch panel”, and thus the description thereof is omitted here.

(B) Optical functional layer The optical functional layer in this embodiment is a member having a retardation layer in which a liquid crystal material is fixed.

FIG.6(c) is a schematic sectional drawing which shows the other example of the base material with a coating layer for display devices of this aspect. The optical functional layer in this embodiment has an alignment layer 27 and a retardation layer 28, as shown in FIG. Note that reference numerals not described can be the same as those in FIG. 6A, and thus description thereof is omitted here.

The optical functional layer in this embodiment can be the same as the content described in the above section “4. Second functional layer (1) First embodiment (b) Optical functional layer”, and therefore the description here. Is omitted.

(C) Other members The second functional layer in this aspect may include other materials, if necessary, in addition to the touch panel and the optical functional layer described above. Examples of other members include an adhesive layer and a protective layer. The adhesive layer and the protective layer can be the same as the contents described in the above section “2. First functional layer (3) Other members”, and thus the description thereof is omitted here.

6. Other members The base material with a coating layer for a display device according to the present invention may have the above-mentioned covering member, the first functional layer and the base material, and may have other members as necessary. .. Examples of other members include an adhesive layer, a protective layer, an antireflection layer, and the like. The adhesive layer, the protective layer, and the antireflection layer can have the same contents as those described in the above section “2. First functional layer (3) Other member”, and therefore the description here is omitted. Omit it.

B. A color filter substrate with a coating layer for a display device A color filter substrate with a coating layer for a display device according to the present invention includes a substrate, a first functional layer disposed on one surface of the substrate, and the first functional layer. A color filter substrate with a coating layer for a display device, which is disposed on the surface of the functional layer opposite to the substrate and has a transparent coating layer, the color filter substrate having a coating layer for the display device. The material has a product region to be a display device, and a non-product region arranged on the outer periphery of the product region, and the first functional layer has a light-shielding portion having an opening and a coloring arranged in the opening. A color filter having a layer, the product region and the non-product region of the first functional layer have a step difference of 1.5 μm or more on the surface on the coating layer side, and the product region and the product layer of the coating layer. The non-product region is a member having a step difference of 0.1 μm or less on the surface opposite to the first functional layer.

The color filter substrate with a coating layer for a display device of the present invention is a member in which the first functional layer in the substrate with a coating layer for a display device is a color filter. Therefore, the description of the drawing of the color filter substrate with a coating layer for a display device can be the same as that in FIGS. 1A and 1B described above, and thus the description thereof is omitted here.

According to the present invention, by providing the coating layer on the surface having the predetermined step including the product area and the non-product area of the color filter, the step of the surface including the product area and the non-product area of the color filter is made flat. It is possible to provide a color filter substrate with a coating layer for a display device, which is capable of suppressing the generation of voids due to the step of the color filter. Note that the description of the specific effects can be the same as the content described in the above-mentioned section "A. Substrate with a coating layer for a display device", and thus the description thereof is omitted here.

In the color filter substrate with a coating layer for a display device of the present invention, the non-product region of the substrate has a flattening layer made of the same material as the colored layer on the surface on the first functional layer side. It is preferable that the coating layer is arranged on the surface opposite to the base material. The flattening layer can be the same as the content described in the above section “A. Substrate with coating layer for display device 3. Flattening layer”, and thus the description thereof is omitted here.

The color filter substrate with a coating layer for a display device of the present invention has at least a substrate, a colored layer, a light shielding part, and a coating layer. The base material, the colored layer, the light-shielding portion, and the coating layer in the color filter substrate with the coating layer for a display device of the present invention are the same as those described in the above-mentioned "A. Substrate with a coating layer for a display device". Therefore, the description here is omitted. Further, the color filter substrate with a coating layer for a display device of the present invention has, in addition to the above-mentioned members, other members such as a frame light-shielding portion, a decorative member, and a second functional layer, if necessary. It may be. The other members in the present invention can be the same as the contents described in the above-mentioned section "A. Substrate with a coating layer for a display device", and therefore the description thereof is omitted here.

C. Laminated body A laminated body of the present invention is a device including the above-mentioned color filter substrate with a coating layer for a display device and a display panel.

FIG. 7: is a schematic plan view which shows an example of the laminated body of this invention. As shown in FIG. 7, the laminate 100 of the present invention has a color filter substrate 20 with a coating layer for a display device and a display panel 40. The laminated body 100 shown in FIG. 7 is a case where the color filter substrate 20 with a coating layer for a display device does not have a decorating member, and is the same as the display panel 40 of the color filter substrate 20 with a coating layer for a display device. Is an example showing a case where the decorative member 30 is provided on the opposite surface.

Further, the laminate 100 shown in FIG. 7 is an example showing a single display device, but may be, for example, a multi-faced display device in which a plurality of functional layers are multi-faced on a single base material. .. In this case, the color filter substrate with a coating layer for a display device according to the present invention has, for example, as shown in FIG. 1B, a frame light-shielding portion 22 ′ on the outer peripheral portion where the wiring of each display device is arranged. It is preferable to have. In the present invention, for example, as shown in FIG. 2B, the steps t ₁ and t ₂ generated by the frame light-shielding portion 22 ′ can be filled with a coating layer to be planarized, and between the coating layer and In addition, it is possible to suppress the generation of voids that are non-contact areas.

The specific structure of the laminate of the present invention can be the same as that of, for example, Japanese Patent No. 5392644, and thus detailed description thereof is omitted here.

Applications of the laminate of the present invention include, for example, mobile phones such as smartphones, mobile information terminals such as tablet PCs, personal computers, car navigations, digital cameras, electronic organizers, game machines, vending machines, ATM terminals, POS terminals. Etc.

1. A color filter substrate with a coating layer for a display device A color filter substrate with a coating layer for a display device according to the present invention includes a substrate, a first functional layer disposed on one surface of the substrate, and the first functional layer. A color filter substrate with a coating layer for a display device, which is disposed on the surface of the functional layer opposite to the substrate and has a transparent coating layer, the color filter substrate having a coating layer for the display device. The material has a product region to be a display device, and a non-product region arranged on the outer periphery of the product region, and the first functional layer has a light-shielding portion having an opening and a coloring arranged in the opening. A color filter having a layer, the product region and the non-product region of the first functional layer have a step difference of 1.5 μm or more on the surface on the coating layer side, and the product region and the product layer of the coating layer. The non-product region is a member having a step difference of 0.1 μm or less on the surface opposite to the first functional layer.
The color filter substrate with a coating layer for a display device according to the present invention can be the same as the content described in the above section “B. Color filter substrate with a coating layer for a display device”, The description in is omitted.

2. Display Panel The display panel in the present invention is typically a liquid crystal display panel or an electroluminescent (EL) panel, but may be an electronic paper panel, a display device using a cathode ray tube, or various known display panels.

The display panel described above can be the same as that used in a general display device, and thus a detailed description thereof will be omitted here.

D. Method for producing base material with coating layer for display device The production method for the base material with coating layer for display device of the present invention is not particularly limited as long as it is a method capable of obtaining a desired base material with coating layer for display device. In the present invention, the following three modes (A mode, B mode, C mode) are included.
Hereinafter, the method for producing the base material with the coating layer for a display device of the present invention will be described separately in the A mode, the B mode, and the C mode.

1. Aspect of A The method for producing a substrate with a coating layer for a display device according to this aspect includes a substrate, a first functional layer disposed on one surface of the substrate, and the substrate of the first functional layer. A method for producing a substrate with a coating layer for a display device, which is disposed on a surface opposite to the substrate, and has a coating layer having a transparency, the method comprising: The coating layer forming step of forming the coating layer on the surface of the layer opposite to the base material, and the surface of the coating layer opposite to the first functional layer is polished after the coating layer forming step. And a polishing step, the substrate with a coating layer for a display device has a product region to be a display device, and a non-product region arranged on the outer periphery of the product region, and the product of the first functional layer. The region and the non-product region have a step difference of 1.5 μm or more on the surface on the coating layer side, and the coating layer obtained in the coating layer forming step is at least a step on the coating layer side of the first functional layer. In the product region and the non-product region of the coating layer obtained in the polishing step, the step difference on the surface opposite to the first functional layer is 0.1 μm or less. It is a characteristic manufacturing method.

FIG. 8A and FIG. 8B are schematic process diagrams showing an example of a method of manufacturing the substrate with a coating layer for a display device according to this embodiment. As shown in FIG. 8( a ), the method for producing a base material with a coating layer for a display device according to this embodiment is a coating method for forming a coating layer 3 on the surface of the first functional layer 2 a opposite to the base material 1. A layer forming step and, as shown in FIG. 8B, after the coating layer forming step, there are a polishing step of polishing the surface of the coating layer 3 opposite to the first functional layer 2a. 8A and 8B are examples in which a color filter having the colored layer 21 and the light shielding portion 22 is used as the first functional layer 2a, and the non-product region is omitted for simplification of the drawing. is doing. The non-product region of the base material with a coating layer for a display device shown in FIGS. 8A and 8B can be the same as in FIGS. 1A and 1B. The reference numerals not described in FIGS. 8A and 8B can be the same as those in FIG. 1A, and thus the description thereof is omitted here.

According to this aspect, by including the polishing step of polishing the coating layer after the coating layer forming step, even when the thickness of the coating layer formed in the coating layer forming step is increased, the coating layer is formed in the polishing step. Can be adjusted to a desired thickness. Therefore, by increasing the thickness of the coating layer formed in the coating layer forming step, it is possible to fill a predetermined step of the first functional layer and flatten the step of the surface of the first functional layer. It is possible to obtain a substrate with a coating layer for a display device, which can suppress the generation of voids due to the step of the one-functional layer.

Hereinafter, the method for producing the substrate with a coating layer for a display device according to this embodiment will be described in each step.

(1) Covering Layer Forming Step The covering layer forming step in this embodiment is a step of forming a covering layer on the surface of the first functional layer opposite to the base material.

The coating layer forming step in this aspect is not particularly limited as long as the coating layer can be formed on the surface of the first functional layer having a predetermined step. In this aspect, the surface of the first functional layer can be filled with the steps to be flattened, and the coating layer is formed so as not to generate voids which are non-contact areas at the contact interface between the first functional layer and the coating layer. Is preferable. Here, in the present aspect, since the coating layer forming step has a polishing step of polishing the coating layer to a desired thickness, it is not necessary to particularly consider the thickness of the coating layer obtained by the coating layer forming step in the present aspect. .. Therefore, the coating layer formed in the coating layer forming step in the present embodiment can fill the steps on the surface of the first functional layer and flatten it, and at the contact interface between the first functional layer and the coating layer, The thickness can be set so that no voids that are contact regions are generated.

The thickness of the coating layer formed in the coating member forming step in this aspect can be flattened by filling the step on the surface of the first functional layer, and is non-contact at the contact interface between the first functional layer and the coating layer. It is preferable that the thickness is such that voids that form regions are not generated. Specifically, it can be appropriately adjusted according to the level difference on the surface of the first functional layer, and for example, it is preferably within a range of 1 to 15 times the level difference on the surface of the first functional layer, and among them, 1 It is preferably in the range of 0.5 times to 12 times, and particularly preferably in the range of 2 times to 10 times. By setting the thickness of the coating layer formed in the coating layer forming step within the above range, it is possible to sufficiently fill the level difference on the surface of the first functional layer and planarize it, and to form the first functional layer and the coating layer. It is possible to sufficiently suppress the generation of voids that are non-contact areas at the contact interface.

As a specific method of the coating layer forming step in this embodiment, for example, a method of applying the coating layer forming composition forming the coating layer to the surface of the first functional layer can be mentioned.

Here, the coating layer forming composition preferably has a predetermined fluidity. By coating the coating layer-forming composition having fluidity on the surface of the first functional layer having a predetermined step, the coating layer-forming composition enters the step of the surface of the first functional layer to form the first function. At the contact interface between the layer and the coating layer, it is possible to sufficiently suppress the generation of voids that are non-contact areas.

The term “having fluidity” means that when the coating layer-forming composition is applied to the surface of the first functional layer having a predetermined step, the coating layer-forming composition has a step difference of the first functional layer. This means that it is possible to suppress the generation of voids, which are non-contact areas, at the contact interface between the first functional layer and the coating layer, which penetrates into every corner. Specifically, it is preferably in the range of 3 cp or more and 20 cp or less when measured using an E-type viscometer at 22° C.

The composition for forming a coating layer having fluidity used in this step preferably contains, for example, a solvent. From the viewpoint of imparting sufficient fluidity to the coating layer forming composition, the content of the solvent contained in the coating layer forming composition is preferably appropriately adjusted according to the ratio of the solid content. For example, the solid content in the coating layer forming composition is preferably in the range of 1% by mass or more and 40% by mass or less, and more preferably in the range of 3% by mass or more and 35% by mass or less, In particular, it is preferably in the range of 5% by mass or more and 30% by mass or less.

The coating layer formed in this step is preferably formed using the above-mentioned composition for forming a coating layer having fluidity. Examples of the material of the coating layer include an ionizing radiation curable resin composition, a thermosetting resin composition, and a thermoplastic resin composition. Among them, the ionizing radiation curable resin composition is preferable. The details of the ionizing radiation curable resin composition, the thermosetting resin composition and the thermoplastic resin composition are described in the above-mentioned "A. Substrate with coating layer for display device 1. Coating layer". Since it can be the same as the content, the description here is omitted.

As a method for applying the composition for forming a coating layer, a general application method can be used, for example, a spin coating method, a die coating method, a slit coating method, a gravure printing method, an offset printing method, a relief printing method, Various printing methods such as screen printing method, transfer printing method, electrostatic printing method, plateless printing method, gravure coating method, roll coating method, knife coating method, air knife coating method, bar coating method, dip coating method, kiss coating method , A spray coating method, a comma coating method, an inkjet method and the like.

The coating layer forming step in the present embodiment may include a temporary drying step of applying the coating layer forming composition and then temporarily drying it to form a coating layer forming coating film. By having the temporary drying step, the applied coating layer forming composition can be used as a coating layer forming coating film.

The provisional drying step in this embodiment is preferably a step in which the coating layer forming composition can be provisionally dried. Specifically, the solvent contained in the coating layer forming composition is removed, and the solvent is contained. It is preferable that the step is such that a coating film for forming a coating layer having an amount within a predetermined range is obtained.

Here, the "coating film" refers to a state in which the film is not in a cured and dried state. For example, it can be confirmed by directly touching the surface of the coating film, including the dry state to the touch and the semi-cured state defined in JIS K 5600-1-1.
Further, the "coating layer forming coating film having a solvent content within a predetermined range" refers to a state in which all the solvent is not removed from the coating layer forming composition, and specifically, the coating layer forming film. The amount of the solvent in the coating film for use is preferably in the range of 5 wt% or more and 30 wt% or less, particularly preferably in the range of 5 wt% or more and 20 wt% or less, and particularly 5 wt% or more and 10 wt% or less It is preferably within the range of.

The method for temporarily drying the coating layer-forming composition in the temporary drying step is not particularly limited as long as it is a method capable of obtaining a desired coating layer-forming coating film, and examples thereof include a method of drying under reduced pressure and heating and drying. .. The conditions such as the temporary drying time in the temporary drying step are not particularly limited because they can be appropriately adjusted according to the type of the coating layer forming composition.

In the coating layer forming step in the present embodiment, after applying the coating layer forming composition, or after the provisional drying step if there is a temporary drying step, the coating layer forming composition or the coating layer forming coating film. It is preferable to have a firing step of firing.

The firing step in this embodiment is preferably a method capable of firing a coating layer-forming composition or coating layer-forming coating film to obtain a desired coating layer. For example, an oven or a hot plate was used. A general baking method can be used. Further, the firing temperature and firing time in the firing step are not particularly limited because they can be appropriately adjusted depending on the type of the coating layer forming composition and the like.

The coating member forming step in the present invention may include other steps, if necessary, in addition to the above-mentioned coating step, temporary drying step, and firing step. Examples of other steps include a removal step of removing an unnecessary area in the obtained covering member.

In addition, regarding the detailed description of the first functional layer and the coating layer in which the coating layer is formed in the coating layer forming step in the present embodiment, the contents described in the above-mentioned section "A. Substrate with coating layer for display device". The description can be omitted here because it can be the same. The method of forming the first functional layer can be the same as the method of forming a general functional layer, and thus the description thereof is omitted here.

(2) Polishing step In this embodiment, after the above-mentioned coating member forming step, the surface of the coating layer opposite to the first functional layer is polished.

A specific method for polishing the coating layer may be any method capable of polishing the coating layer such that the step difference on the surface of the coating layer opposite to the first functional layer is 0.1 μm or less. It can be appropriately adjusted according to the material forming the coating layer and the target thickness of the coating layer. Note that since a generally known method can be used as a specific polishing method, description thereof is omitted here.

The thickness and the like of the coating layer obtained in the polishing step in this embodiment can be the same as those described in the above-mentioned “A. Substrate with coating layer for display device”, and therefore the description here is omitted. Omit it.

(3) First functional layer preparation step In this aspect, it is preferable to have a first functional layer preparation step before the coating layer formation step. The first functional layer preparation step may be a step of forming the first functional layer on the base material, and a step of preparing a base material with a first functional layer in which the first functional layer is previously arranged on the base material. May be

In this embodiment, the step may be any one capable of preparing the first functional layer on one surface of the base material, and the specific method may be appropriately selected depending on the type of the first functional layer. it can. The specific method of forming the first functional layer on the base material can be the same as the general method of forming the first functional layer, and thus the description thereof is omitted here.

(4) Second functional layer forming step In this embodiment, in addition to the above-mentioned coating layer forming step, polishing step and first functional layer preparing step, the second function is provided on the surface of the coating layer opposite to the base material. You may have the 2nd functional layer arrangement|positioning process of arrange|positioning a layer.

In this embodiment, it is sufficient that the step is such that the second functional layer can be arranged on the surface of the coating layer opposite to the base material. For example, the second functional layer is arranged on the coating layer by transfer. Alternatively, the second functional layer may be formed directly on the coating layer.

In this aspect, it is preferable to arrange the second functional layer by a roll-to-roll method from the viewpoint of productivity. The second functional layer in this embodiment can be appropriately selected according to the type of the first functional layer. Examples of the second functional layer include a color filter, a touch panel, an optical functional layer, and the like. A specific method for forming the second functional layer includes a general color filter, a touch panel, and an optical functional layer. Since the same can be applied, the description here is omitted. The detailed description of the second functional layer can be the same as the content described in the above section “A. Substrate with coating layer for display device 5. Second functional layer”. The description in is omitted.

(5) Other steps In this embodiment, in addition to the above-mentioned coating layer forming step, polishing step, and second functional layer arranging step, there are other steps for forming other members as necessary. Is also good. For example, an adhesive layer forming step of forming an adhesive layer, a protective layer forming step of forming a protective layer, an antireflection layer forming step of forming an antireflection layer, etc. may be mentioned. The specific method of forming these other members can be the same as the method of forming a general adhesive layer, protective layer, antireflection layer, and the like, and thus the description thereof is omitted here. Further, the detailed description of the other members can be the same as the contents described in the above-mentioned section “A. Substrate with coating layer for display device 6. Other members”, and therefore the description here. Is omitted.

2. Aspect B: The method for producing a substrate with a coating layer for a display device according to this aspect includes a substrate, a first functional layer arranged on one surface of the substrate, and the substrate of the first functional layer. A method for producing a substrate with a coating layer for a display device, which is disposed on a surface opposite to the substrate, and has a coating layer having a transparency, the method comprising: On the surface opposite to the base material of the layer, a coating layer forming composition arranging step of arranging a coating layer forming composition constituting the coating layer, and after the coating layer forming composition arranging step, A coating layer forming step of curing the coating layer forming composition to form the coating layer while pressing the coating layer forming composition from the surface opposite to the first functional layer using a plate. The substrate with a coating layer for a display device has a product region to be a display device, and a non-product region arranged on the outer periphery of the product region, and the product region of the first functional layer and the The non-product region has a step difference of 1.5 μm or more on the surface on the coating layer side, and the product region and the non-product region of the coating layer obtained in the coating layer forming step are different from the first functional layer. The manufacturing method is characterized in that the step on the opposite surface is 0.1 μm or less.

FIG. 9A to FIG. 9C are schematic process diagrams showing another example of the method for manufacturing the substrate with the coating layer for a display device according to this embodiment. As shown in FIG. 9( a ), the method for producing a base material with a coating layer for a display device according to the present embodiment includes a coating layer that forms a coating layer on the surface of the first functional layer 2 a opposite to the base material 1. After the coating layer forming composition arranging step of arranging the coating layer forming composition 3 ′ and the coating layer forming composition arranging step, as shown in FIG. A coating for curing the coating layer forming composition 3′ while pressing the plate P from the surface opposite to the functional layer 2a to form the coating layer 3 as shown in FIG. 9(c). A layer forming step. 9(a) to 9(c) are examples in which a color filter having a colored layer 21 and a light shielding portion 22 is used as the first functional layer 2a, and a non-product region is shown for simplification of the drawing. Is omitted. The non-product region of the substrate with a coating layer for a display device shown in FIGS. 9A to 9C can be the same as in FIGS. 1A and 1B. The reference numerals not described in FIGS. 9A to 9C can be the same as those in FIG. 1A, and thus the description thereof is omitted here.

According to this aspect, after the coating layer forming composition disposing step, the coating layer forming composition is pressed by the plate, and the coating layer forming step of curing the coating layer forming composition in that state is performed. The composition for forming a coating layer can be incorporated into every step of the surface of the one-functional layer. Therefore, it is possible to fill a predetermined step of the first functional layer to make the step of the surface of the first functional layer flat, and to suppress the generation of voids due to the step of the first functional layer. It is possible to obtain a substrate with a coating layer.

Hereinafter, the method for producing the substrate with a coating layer for a display device according to this embodiment will be described in each step.

(1) Coating Layer Forming Composition Arranging Step In the coating layer forming composition according to the present aspect, the coating layer forming composition forming the coating layer is arranged on the surface of the first functional layer opposite to the base material. It is a process to do.

Regarding the coating layer forming composition used in the coating layer forming composition arranging step in the present aspect, and the method of arranging the coating layer forming composition, the above-mentioned “1. A aspect (1) coating layer forming step” Since the contents can be the same as the contents described in the above section, the description here is omitted.

In this step, the amount or thickness of the composition for forming a coating layer arranged on the stepped surface of the first functional layer is adjusted by pressing with a plate in the coating layer forming step after this step and forming the coating layer in that state. When the composition for curing is hardened, a predetermined step of the first functional layer is filled and flattened, and generation of voids which are non-contact regions at the contact interface between the first functional layer and the coating layer is suppressed. Further, it is preferable that the amount or thickness is such that the step on the surface of the coating layer on the side opposite to the substrate can be set to 0.1 μm or less. The specific amount or thickness of the coating layer forming composition is not particularly limited because it can be appropriately adjusted depending on the type of the first functional layer, the material of the coating layer forming composition, and the like.

The coating layer forming composition disposing step in this embodiment may include a temporary drying step of temporarily drying the coating layer forming composition after disposing the coating layer forming composition. The detailed description of the provisional drying step, the coating layer forming composition used in the coating layer forming composition arranging step in the present aspect, the first functional layer in which the coating layer forming composition is arranged, and the like are described below. Since the contents can be the same as the contents described in the section of “1. A mode (1) coating layer forming step” described above, description thereof is omitted here. The method of forming the first functional layer can be the same as the method of forming a general functional layer, and thus the description thereof is omitted here.

(2) Covering Layer Forming Step In the covering layer forming step in this embodiment, after the covering layer forming composition arranging step, the covering layer forming composition is pressed using a plate from the surface opposite to the first functional layer. Meanwhile, it is a step of curing the composition for forming a coating layer to form a coating layer.

The plate used in the coating layer forming step in this embodiment has at least a flat surface such that the step of the surface of the coating layer obtained in this step on the side opposite to the substrate can be flattened to 0.1 μm or less. It is preferable that the plate has a plate. Note that the plate used in this step can be the same as the plate used for general pressing and the like, so description thereof will be omitted here.

The method of curing the coating layer forming composition in this step can be appropriately selected depending on the type of the coating layer forming composition and the like, and is not particularly limited. In this aspect, for example, a method of firing the composition for forming a coating layer may be mentioned. The method for firing the composition for forming a coating layer can be the same as the content described in the above-mentioned section “1. A. Mode (1) Coating layer forming step”, and therefore the description here. Is omitted.

(3) First functional layer arranging step In this aspect, it is preferable to have a first functional layer preparing step before the covering layer forming step. The first functional layer preparation step may be a step of forming the first functional layer on the base material, and a step of preparing a base material with a first functional layer in which the first functional layer is previously arranged on the base material. May be The first functional layer preparation step can be the same as the content described in the section “1. A aspect (3) First functional layer preparation step” described above, and therefore description thereof is omitted here. To do.

(4) Second functional layer arranging step In this embodiment, in addition to the coating layer forming composition arranging step and the covering layer forming step described above, the second functional layer is provided on the surface of the covering layer opposite to the base material. You may have the 2nd functional layer arrangement|positioning process which arrange|positions. Note that the second functional layer arranging step can be the same as the content described in the section “1. A aspect (4) Second functional layer arranging step” described above, and therefore the description thereof is omitted here. To do.

(5) Other Steps In the present embodiment, other than the above-mentioned coating layer forming composition arranging step, coating layer forming step, second functional layer arranging step, other members are formed as necessary. You may have a process. Since the other steps can be the same as those described in the above section “1. Aspect (5) Other steps”, the description thereof is omitted here.

3. Aspect of C The method for producing a base material with a coating layer for a display device of the present aspect includes a base material, a first functional layer disposed on one surface of the base material, and the base material of the first functional layer. And a cover layer for a display device having a transparent coating layer disposed on a surface opposite to the display region, and a product region to be a display device, and a non-product region disposed on the outer periphery of the product region. A method for manufacturing a base material with a coating layer for a display device for manufacturing a base material, comprising: a first functional layer preparing step of preparing the first functional layer in the product area; and a flattening layer in the non-product area. And a coating layer forming step of forming the coating layer on the first functional layer and the planarizing layer, wherein the product region of the first functional layer and the non-coating layer are formed. The product region has a step difference of 1.5 μm or more on the surface on the side of the coating layer, and the product region and the non-product region of the coating layer have a step difference on the side opposite to the first functional layer of 0. It is a manufacturing method characterized by being 1 μm or less.

10(a) to 10(c) are schematic process diagrams showing another example of the method for producing the substrate with a coating layer for a display device according to this embodiment. As shown in FIG. 10A, the method for manufacturing a base material with a coating layer for a display device according to this embodiment includes a flattening layer forming step of forming the flattening layer 4 in the non-product region X. Here, in this aspect, the material included in the planarizing layer 4 is the material included in the first functional layer 2a, and the same material as the material of the green colored layer 21G in FIG. 10A. Further, the planarizing layer forming step in this embodiment is performed at the same time as the step of forming the first functional layer 2a, that is, the step of forming the green colored layer 21G in FIG. 10A. Then, in this aspect, as shown in FIG. 10B, there is a step of forming the red colored layer 21R and the blue colored layer 21B that form the first functional layer 2a. 10A and 10B are examples in which a color filter having the colored layer 21 and the light shielding portion 22 is used as the first functional layer 2a. Finally, as shown in FIG. 10C, there is a coating layer forming step of forming the coating layer 3 on the product region Y and the non-product region X. Reference numerals not described in FIGS. 10A to 10C can be the same as those in FIG. 1B, and thus description thereof is omitted here.

According to this aspect, since the non-product region of the base material has the flattening layer, predetermined steps in the product region and the non-product region of the first functional layer can be filled with the flattening layer, and It is possible to obtain a substrate with a coating layer for a display device that can suppress the generation of voids due to the step.

Hereinafter, the method for producing the substrate with a coating layer for a display device according to this embodiment will be described in each step.

(1) Planarizing Layer Forming Step The planarizing layer forming step in this embodiment is a step of forming a planarizing layer on the surface of the non-product region of the base material on the first functional layer side. Further, the planarizing layer forming step in this aspect is a step performed at the same time as the first functional layer because the material contained in the planarizing layer is the same material as the material contained in the first functional layer.

The flattening layer obtained in the flattening layer forming step can be the same as the contents described in the above-mentioned section “A. Substrate with coating layer for display device 3. Flattening layer”. Is omitted. The manufacturing method may be the same as that of the first functional layer formed at the same time as the flattening layer, and

(2) Coating layer forming step The coating layer forming step in this embodiment is a step of forming a coating layer in the product region and the non-product region on the surface of the first functional layer opposite to the base material. In addition, regarding the specific material of the coating layer, the method of forming the coating layer, and the detailed description of the first functional layer, the contents described in the above-mentioned section “1. A mode (1) coating layer forming step”. The description can be omitted here because it can be the same.

(3) First functional layer arranging step In this aspect, it is preferable to have a first functional layer preparing step before the planarizing layer forming step. The first functional layer preparation step may be a step of forming the first functional layer on the base material, and a step of preparing a base material with a first functional layer in which the first functional layer is previously arranged on the base material. May be The first functional layer preparation step can be the same as the content described in the section “1. A aspect (3) First functional layer preparation step” described above, and therefore description thereof is omitted here. To do.

(4) Second functional layer arranging step In this aspect, in addition to the above-mentioned coating layer forming step, a second functional layer arranging step of arranging the second functional layer on the surface of the coating layer opposite to the base material. May have. Note that the second functional layer arranging step can be the same as the content described in the section “1. A aspect (4) Second functional layer arranging step” described above, and therefore the description thereof is omitted here. To do.

(5) Other Steps In addition to the above-described coating layer forming step and second functional layer arranging step, this embodiment may include other steps for forming other members as necessary. Since the other steps can be the same as those described in the above section “1. Aspect (5) Other steps”, the description thereof is omitted here.

The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, has substantially the same configuration as the technical idea described in the scope of the claims of the present invention, and has the same operational effect It is included in the technical scope of the invention.

[Example]
A color filter substrate with a coating layer for a display device of the present invention was produced as follows.

(Preparation of copolymer resin solution)
Charge 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) into the polymerization tank. After stirring and dissolving, 7 parts by mass of 2,2′-azobis(2-methylbutyronitrile) was added and uniformly dissolved. Then, the mixture was stirred at 85° C. for 2 hours under a nitrogen stream, and further reacted at 100° C. for 1 hour. 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100° C. for 5 hours to prepare a copolymer resin solution ( Solid content 50%) was obtained.

(Synthesis of coating layer forming composition)
The following materials were stirred and mixed at room temperature to obtain a coating layer forming composition.
<Composition of coating layer forming composition>
-The above copolymer resin solution (solid content 50%): 16 parts by mass-Dipentaerythritol pentaacrylate (trade name: SR399, manufactured by Sartomer): 24 parts by mass-Orthocresol novolac type epoxy resin (trade name: Epicoat 180S70, Yuka Shell Epoxy Co., Ltd.): 4 parts by mass 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one (trade name: Irgacure 907, Ciba Specialty Chemicals) : 4 parts by mass diethylene glycol dimethyl ether (manufactured by Junsei Chemical Co., Ltd.): 52 parts by mass

(Formation of color filter substrate)
(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed by a sand mill to prepare a black pigment dispersion,

<Composition of black pigment dispersion>
・Black pigment 23 parts by mass ・Polymer dispersant (Big Chemie Japan KK Disperbyk111) 2 parts by mass ・Solvent (diethylene glycol dimethyl ether) 75 parts by mass

Next, the following amounts of components were sufficiently mixed to obtain a light-shielding portion forming composition.
<Composition of composition for forming light-shielding portion>
61 parts by mass of the black pigment dispersion 20 parts by mass of the curable resin composition 30 parts by mass of diethylene glycol dimethyl ether

The composition for forming a light-shielding portion was applied onto a glass substrate (AN material manufactured by Asahi Glass Co., Ltd.) having a thickness of 0.7 mm by a spin coater and dried at 100° C. for 3 minutes to form a light-shielding layer having a thickness of about 1 μm. The light-shielding layer is exposed to a light-shielding pattern (stripe pattern in which RGB is repeated at a pitch of 75 μm) with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution, and then the substrate is placed in an atmosphere of 200° C. A heat treatment was performed by leaving it for 30 minutes to form a light-shielding portion having a plurality of openings.

(Formation of colored layer)
A red curable resin composition having the following composition was applied by a spin coating method (coating thickness: 2.0 μm) on a glass substrate having a light shielding part formed as described above, and then dried in an oven at 70° C. for 3 minutes. did. Then, a photomask is arranged at a distance of 100 μm from the coating film of the red curable resin composition, and an ultraviolet ray is applied only to a region corresponding to the formation region of the colored portion by using a 2.0 kW ultra-high pressure mercury lamp with a proximity liner. Irradiate for 10 seconds. Then, it was immersed in a 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23° C.) for 1 minute for alkali development to remove only the uncured portion of the coating film of the red curable resin composition. After that, the substrate was left in an atmosphere of 200° C. for 15 minutes to perform heat treatment to form a red relief pattern (red coloring layer) in the opening of the light shielding part.
Next, a green curable resin composition having the following composition was used to form a green relief pattern (green colored layer) in the opening of the light-shielding portion by the same process as the formation of the red relief pattern.
Further, a blue curable resin composition having the following composition was used to form a blue relief pattern (blue colored layer) in the opening of the light-shielding portion by the same process as the formation of the red relief pattern.

(Formation of coating layer)
Finally, a coating layer was formed on the obtained light-shielding portion and the coloring layer to obtain a color filter substrate with a coating layer for a display device of the present invention. The coating layer was formed as follows. That is, first, the curable resin composition was applied by a spin coating method and dried to form a coating film having a thickness of 25 μm. Then, a photomask was arranged at a distance of 100 μm from the coating film of the curable resin composition, and ultraviolet rays were irradiated for 10 seconds by a proximity liner using a 2.0 kW ultra-high pressure mercury lamp. Then, by leaving it in an atmosphere of 200° C. for 15 minutes, heat treatment was performed to form a coating layer.

(Polishing process)
The coating layer in the obtained color filter substrate with a coating layer for a display device was polished using a diamond polishing belt. The thickness of the coating layer after the polishing step was 2 μm.

(Formation of optical function layer for transfer)
A photo-alignment film composition containing a photo-alignment material having a polyvinyl cinnamate (PVCi) group on the transfer substrate so that the film thickness after curing is about 0.1 μm (PGME is used as a solvent) Was applied by the die coating method.
Then, it was dried in a dryer adjusted to 90° C. for 2 minutes to evaporate the solvent and heat cure the composition to form a photo-alignment film (alignment layer).
A liquid crystal composition (solid content 30%, MIBK is used as a solvent) containing a liquid crystal compound exhibiting a photopolymerizable nematic phase and a photopolymerization initiator is applied thereon by a die coating method and dried to 1 μm. A liquid crystal layer was formed to obtain a transfer film having a retardation layer.
After that, an ultraviolet curable adhesive layer having a thickness of 3 μm was formed on the surface of the obtained transfer film on the retardation layer side.

(Transfer process)
The coating layer side of the obtained color filter substrate with a coating layer for a display device and the ultraviolet curable adhesive layer formed on the transfer optical functional layer were bonded together so that air could not enter. Then, ultraviolet rays were irradiated from the surface on the optical functional layer side to cure the ultraviolet curable adhesive layer. Then, the transfer substrate was peeled off.

[Evaluation]
According to the above-described examples, a color filter substrate with a coating layer for a display device was obtained in which the color filter substrate and the optical functional layer were bonded together via the adhesive layer. The obtained color filter substrate with a coating layer for a display device was able to suppress the generation of voids due to the steps of the color filter.

1, 1a... Base material 2a... 1st functional layer 2b... 2nd functional layer 3... Covering layer 4... Flattening layer 10... Base material with a coating layer for display devices 20... Color filter base material with a coating layer for display devices 40 ... Display panel 100 ... Laminated body

Claims (2)

A base material, a first functional layer arranged on one surface of the base material, and a transparent coating layer arranged on a surface of the first functional layer opposite to the base material. A color filter substrate with a coating layer for a display device, comprising:
The color filter substrate with a coating layer for a display device has a product region to be a display device, and a non-product region arranged on the outer periphery of the product region,
The first functional layer is a color filter having a light-shielding portion having an opening and a colored layer arranged in the opening,
In the product region and the non-product region of the first functional layer, the step on the surface on the coating layer side is 1.5 μm or more,
Wherein said product area and the non-product area of the coating layer state, and are stepped 0.1μm or less surface opposite to the first functional layer,
The non-product region of the base material has a flattening layer having the same material as the colored layer on the surface on the first functional layer side,
Wherein the surface opposite to the base material of the planarizing layer, a display device for a coating layer with a color filter substrate, wherein the coating layer is characterized that you have been placed. A color filter substrate with a coating layer for a display device according to claim 1 .
And a display panel.