Window manufacturing apparatus, window manufacturing method, and display device manufacturing method

Abstract

A window manufacturing apparatus, a window manufacturing method, and a display device manufacturing method are disclosed. A window manufacturing apparatus according to an embodiment of the present invention includes: a conveyance stage defining a placement surface on which an object substrate is placed, and including a first portion and a second portion having a greater thickness than the first portion; a suction stage defining a plurality of suction ports that suction the object substrate; and an attachment device that attaches a protective film to the object substrate suctioned to the suction stage, in a state in which the object substrate placed on the conveyance stage is suctioned by the suction stage, the plurality of suction ports are defined to overlap the second portion of the conveyance stage and not overlap the first portion in a plan view. Thus, it is possible to improve folding reliability and durability of a window manufactured by the window manufacturing apparatus.

Description

Technical Field

[0001] The present invention relates to a window manufacturing apparatus capable of manufacturing a window with improved folding reliability, a window manufacturing method, and a display device including the thereof. Background Technology

[0002] Display devices provide information to users by displaying various images on a screen. Generally, display devices display information within a designated screen area. Flexible display devices, including foldable flexible display panels, are under development. Unlike rigid display devices, flexible display devices can be folded or rolled up. Flexible display devices, with their adaptable shapes, are not constrained by existing screen sizes and are thus more portable, improving user convenience. Summary of the Invention

[0003] The purpose of this invention is to provide a window manufacturing apparatus and a window manufacturing method that can manufacture windows with improved folding reliability and durability.

[0004] The object of the present invention is to provide a method for manufacturing a display device including a window with improved reliability and durability.

[0005] A window manufacturing apparatus according to an embodiment of the present invention includes: a transport table defining a placement surface for placing a target substrate, and including a first portion and a second portion having a greater thickness than the first portion; an adsorption table defining a plurality of adsorption ports for adsorbing the target substrate; and an attachment device for attaching a protective film to the target substrate adsorbed on the adsorption table, wherein, in a state where the target substrate placed on the transport table is adsorbed by the adsorption table, the plurality of adsorption ports are defined in a plane to overlap with the second portion of the transport table but not with the first portion.

[0006] Alternatively, the object substrate may include a folded portion and a non-folded portion adjacent to the folded portion. When the object substrate is placed on the transport table, the folded portion overlaps with the first portion, and the non-folded portion overlaps with the second portion.

[0007] Alternatively, when the target substrate is adsorbed onto the adsorption stage, the plurality of adsorption ports overlap with the non-folded portion.

[0008] The substrate may include glass.

[0009] It is possible that, with the object substrate placed on the transport table, the object substrate is in contact with the top surface of the second part but not with the top surface of the first part.

[0010] Alternatively, the object substrate may be in contact with the underside of the adsorption stage while it is being adsorbed onto the adsorption stage.

[0011] The surface roughness of the adsorption stage below may be greater than 10 micrometers and less than 50 micrometers.

[0012] Alternatively, a window manufacturing apparatus according to an embodiment of the present invention may further include: a transport device for transporting the object substrate to the transport table and placing it on the placement surface.

[0013] The transport platform may include: a first transport platform for receiving the object substrate from the transport device and placing it on the first transport platform; and a second transport platform for rotating the object substrate placed on the first transport platform and placing it on the second transport platform.

[0014] Alternatively, the protective film may contain polyethylene terephthalate (PET).

[0015] Alternatively, a window manufacturing apparatus according to an embodiment of the present invention may further include a bending evaluation device for measuring the bending strength of the target substrate to which the protective film is attached.

[0016] A window manufacturing method according to an embodiment of the present invention includes: placing a target substrate on a transport stage comprising a first portion and a second portion having a greater thickness than the first portion; adsorbing the target substrate placed on the transport stage through a plurality of adsorption ports defined in an adsorption stage; and attaching a protective film to the target substrate adsorbed in the adsorption stage, wherein in the step of adsorbing the target substrate into the adsorption stage, the plurality of adsorption ports are defined in a plane to overlap with the second portion of the transport stage but not with the first portion.

[0017] Alternatively, a folded portion and an adjacent non-folded portion may be defined in the object substrate. In the step of placing the object substrate on the transport table, the folded portion overlaps with the first portion, and the non-folded portion overlaps with the second portion.

[0018] Alternatively, in the step of adsorbing the object substrate onto the adsorption stage, the plurality of adsorption ports may overlap with the non-folded portion.

[0019] Alternatively, during the step of placing the object substrate onto the transport table, the object substrate may contact the top surface of the second portion but not the top surface of the first portion.

[0020] The substrate may include ultra-thin glass (UTG).

[0021] Alternatively, the protective film may contain polyethylene terephthalate (PET).

[0022] A method for manufacturing a display device according to an embodiment of the present invention includes: a step of preparing a window, the window including a first non-foldable region, a foldable region, and a second non-foldable region arranged sequentially along a first direction; a step of preparing a display module; and a step of combining the window and the display module. The step of preparing the window includes: a step of placing a target substrate on a transport table including a first portion and a second portion that is thicker than the first portion; a step of adsorbing the target substrate placed on the transport table through a plurality of adsorption ports defined in an adsorption table; and a step of attaching a protective film to the target substrate adsorbed on the adsorption table. In the step of adsorbing the target substrate onto the adsorption table, the plurality of adsorption ports are defined in a plane to overlap with the second portion of the transport table but not with the first portion.

[0023] It is possible to define a folded portion that overlaps with the folded area and an unfolded portion that overlaps with the first unfolded area and the second unfolded area in the object substrate. In the step of placing the object substrate on the transport table, the folded portion overlaps with the first portion and the unfolded portion overlaps with the second portion.

[0024] Alternatively, in the step of adsorbing the object substrate onto the adsorption stage, the plurality of adsorption ports may overlap with the non-folded portion.

[0025] According to embodiments of the present invention, for windows suitable for foldable display devices and including a thin film substrate, a protective film attachment process can be performed without damaging the folding portion of the window, thereby improving the folding reliability and durability of the window. Attached Figure Description

[0026] Figure 1a This is a perspective view of a display device according to an embodiment of the present invention.

[0027] Figure 1b It is shown Figure 1a The diagram shows the folded state of the display device.

[0028] Figure 2a This is a perspective view of a display device according to an embodiment of the present invention.

[0029] Figure 2b It is shown Figure 2a The diagram shows the display device in a folded state.

[0030] Figure 3a This is a cross-sectional view of a display device according to an embodiment of the present invention.

[0031] Figure 3b yes Figure 3a The diagram shows a cross-sectional view of the display device in a folded state.

[0032] Figure 4 This is a cross-sectional view of a window structure according to an embodiment of the present invention.

[0033] Figure 5 This is a schematic cross-sectional view of a display module according to an embodiment of the present invention.

[0034] Figure 6a This is a perspective view of a transport table in a window manufacturing apparatus according to an embodiment of the present invention.

[0035] Figure 6b This is a cross-sectional view of a transport table in a window manufacturing apparatus according to an embodiment of the present invention.

[0036] Figure 7a This is a perspective view of an adsorption stage in a window manufacturing apparatus according to an embodiment of the present invention.

[0037] Figure 7b This is a cross-sectional view of the adsorption stage in a window manufacturing apparatus according to an embodiment of the present invention.

[0038] Figures 8a to 8f These are cross-sectional views showing a window manufacturing method according to an embodiment of the present invention.

[0039] (Explanation of reference numerals in the attached diagram)

[0040] DD: Display device; WP: Window

[0041] WL: Window base layer; WPL: Window protection layer

[0042] LT: Transfer table; ST: Adsorption table Detailed Implementation

[0043] In this specification, when a constituent element (or region, layer, part, etc.) is referred to as being "on", "connected to", or "combined with" other constituent elements, it means that it can be directly configured / connected / combined with other constituent elements or that a third constituent element can be configured between them.

[0044] The same reference numerals refer to the same constituent elements. Furthermore, in the drawings, the thickness, scale, and dimensions of the constituent elements are enlarged for the purpose of effectively illustrating the technical content.

[0045] "And / or" includes all combinations of more than one structure that can define an association.

[0046] The terms "first," "second," etc., can be used to describe various constituent elements, but the constituent elements cannot be limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from others. For example, a first constituent element can be named a second constituent element without departing from the scope of the invention, and similarly, a second constituent element can be named a first constituent element. Unless explicitly stated differently in the context, singular expressions include plural expressions.

[0047] In addition, terms such as "below," "lower side," "above," and "upper side" are used to describe the relational relationships of the structures shown in the accompanying drawings. These terms are relative concepts and are explained based on the directions indicated in the accompanying drawings.

[0048] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Additionally, terms identical to those defined in commonly used dictionaries shall be interpreted as having the same meaning as in the context of the related art, and shall not be interpreted as having an idealized or overly formal meaning, unless expressly defined herein.

[0049] Terms such as “including” or “having” should be understood to specify the presence of the features, figures, steps, actions, constituent elements, components, or combinations thereof described in the specification, without precluding the presence or additional possibility of one or more other features or figures, steps, actions, constituent elements, components, or combinations thereof.

[0050] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0051] Figure 1a This is a perspective view of a display device according to an embodiment of the present invention. Figure 1b It is shown Figure 1a The diagram shows the folded state of the display device.

[0052] Reference Figure 1a as well as Figure 1b The display device DD can be a foldable display device. The display device DD according to the present invention can be used not only in large electronic devices such as televisions and monitors, but also in small and medium-sized electronic devices such as mobile phones, tablet computers, car navigation systems, game consoles, and smartwatches.

[0053] The top surface of the display device DD can be defined as the display surface DS. When the display device DD is in its unfolded state, the display surface DS can have a plane defined by the first direction DR1 and the second direction DR2. The third direction DR3 is the direction that intersects the first direction DR1 and the second direction DR2, and can be defined as the thickness direction of the display device DD. The front (or top) and back (or bottom) surfaces of the components constituting the display device DD can be defined with reference to the third direction DR3.

[0054] The display surface DS can include a display area DA and a non-display area NDA surrounding the display area DA. The display area DA is the area where the image IM is displayed, and the non-display area NDA is the area where the image IM is not displayed. Figure 1a In the example of an image-based instant messaging application, an application icon is shown.

[0055] The display area DA can be a quadrilateral shape. The non-display area NDA can surround the display area DA. However, it is not limited to this; the shapes of the display area DA and the non-display area NDA can be designed relative to each other.

[0056] In the display device DD, a first non-foldable region NFA1, a foldable region FA, and a second non-foldable region NFA2 can be sequentially defined along a first direction DR1. That is, the foldable region FA can be defined between the first non-foldable region NFA1 and the second non-foldable region NFA2. Figure 1a as well as Figure 1b The diagram illustrates a folded region FA and first and second non-folded regions NFA1 and NFA2, but the number of folded regions FA and first and second non-folded regions NFA1 and NFA2 is not limited thereto. For example, the display device DD may include more than three non-folded regions and multiple folded regions disposed between the non-folded regions.

[0057] The display device DD can be folded with respect to the folding axis FX. That is, the folding area FA can be bent with respect to the folding axis FX. The folding axis FX can extend along the second direction DR2. The folding axis FX can be defined as an axis parallel to the short side of the display device DD.

[0058] If the display device DD is folded, the display surfaces of the first non-folded region NFA1 and the second non-folded region NFA2 can face each other. Therefore, in the folded state, the display surface DS is not exposed to the outside. In one embodiment of the invention, a back display area (not shown) can be provided on the back of the display device DD. In this case, if the display device DD is folded, the back display area can be exposed to the outside, which can be referred to as in-folding. However, this is illustrative, and the operation of the display device DD is not limited to this.

[0059] For example, in one embodiment of the present invention, if the display device DD is folded, the first non-folded region NFA1 and the second non-folded region NFA2 can be opposite each other. Therefore, in the folded state, the display region DA can be exposed to the outside, which can be referred to as out-folding.

[0060] The display device DD may be capable of either inward folding or outward folding. Alternatively, the display device DD may be capable of both inward folding and outward folding. In this case, the same area of ​​the display device DD, such as the folding area FA, may be folded both inward and outward. Alternatively, a portion of the display device DD may be folded, while another portion may be folded outward.

[0061] Figure 2a This is a perspective view of a display device according to an embodiment of the present invention. Figure 2b It is shown Figure 2a The diagram shows the display device in a folded state.

[0062] Reference Figure 2a as well as Figure 2b In the display device DD-1, a first non-foldable region NFA1-1, a foldable region FA-1, and a second non-foldable region NFA2-1 can be sequentially defined along the second direction DR2. The foldable region FA-1 can be defined between the first non-foldable region NFA1-1 and the second non-foldable region NFA2-1.

[0063] The display device DD-1 can be folded with respect to the folding axis FX'. That is, the folding area FA-1 can be bent with respect to the folding axis FX'. The folding axis FX' can extend along the first direction DR1. The folding axis FX' can be defined as an axis parallel to the long side of the display device DD.

[0064] The following, such as Figure 1a as well as Figure 1b As shown, the structure of a display device DD folded with reference to a folding axis FX parallel to the short side will be explained, but it is not limited to this. The structure described below can also be applied to other devices such as... Figure 2a as well as Figure 2b The display device DD-1 is folded with reference to the folding axis FX' parallel to the long side, as shown.

[0065] Figure 3a This is a cross-sectional view of a display device according to an embodiment of the present invention. Figure 3b yes Figure 3a The diagram shows a cross-sectional view of the display device in a folded state.

[0066] Reference Figure 3a as well as Figure 3b The display device DD may include a window protective layer WPL, a window base layer WL, an anti-reflective layer RPL, a display module DM, a protective layer PL, first and second cover plates CL1 and CL2, and adhesive layers WAL, AL1, AL2, AL3, and AL4.

[0067] The display device DD can repeatedly change shape from a flat first state to a folded second state, or from the second state to the first state. The window protective layer WPL, window base layer WL, anti-reflective layer RPL, display module DM, protective layer PL, and adhesive layers WAL, AL1, AL2, AL3, and AL4 can be flexible. Each of the window protective layer WPL, window base layer WL, anti-reflective layer RPL, display module DM, protective layer PL, and adhesive layers WAL, AL1, AL2, AL3, and AL4 can include a folded region FA. In one embodiment, the display module DM can include a folded region FA. The display module DM can include a first non-folded region NFA1, a folded region FA, and a second non-folded region NFA2 extending along a first direction DR1.

[0068] The window protective layer WPL can be optically transparent. The window protective layer WPL can form the outermost outline of the display device DD. The top of the window protective layer WPL can form the top of the display device DD. That is, in one embodiment of the display device DD, no other structure may be disposed above the window protective layer WPL.

[0069] The window protective layer (WPL) protects the structure disposed beneath it. The WPL may include a protective film. In addition to the protective film, a hard coating, fingerprint-resistant layer, etc., may be added above and / or below the protective film to improve chemical resistance, abrasion resistance, and other properties.

[0070] The window base layer (WL) can be disposed beneath the window protective layer (WPL). The window base layer (WL) can be optically transparent. The window protective layer (WPL) and the window base layer (WL) can be bonded together via the window adhesive layer (WAL). The window base layer (WL) can contain an optically transparent insulating material. The window base layer (WL) can have a multi-layer structure or a single-layer structure.

[0071] Although not illustrated, a hard coating can also be applied over the window base layer WL. This hard coating serves as a functional layer to improve the usability of the display device DD and can be applied over the window base layer WL. For example, the hard coating can improve anti-fouling properties, scratch resistance, and impact resistance. The thickness of the hard coating can be 1 μm or more and 5 μm or less, for example, approximately 1.5 μm.

[0072] Although not illustrated, a shock-absorbing layer can also be disposed beneath the window base layer WL. The shock-absorbing layer can be a functional layer protecting the display module DM from external impacts. The shock-absorbing layer can be selected from films with an elastic modulus of 1 GPa or higher at room temperature. The shock-absorbing layer can be a stretched film including optical functions. For example, the shock-absorbing layer can be an optical axis controlled film. The thickness of the shock-absorbing layer can be from 35 μm to 45 μm, for example, 41 μm, but the thickness is not limited to this. In one embodiment of the invention, the shock-absorbing layer may be omitted.

[0073] A black matrix can be configured on one side of the window base layer (WL). The black matrix can be provided by printing on one side of the shock-absorbing layer. The black matrix can overlap with the non-display area (NDA). As a colored layer, the black matrix can be formed by coating. The black matrix can contain colored organic materials or opaque metals, but the materials constituting the black matrix are not limited to these.

[0074] The following sections discuss the window base layer (WL), window protection layer (WPL), and window adhesive layer (WAL). Figure 4 The explanation is more detailed in the description.

[0075] The anti-reflective layer RPL can be disposed below the window base layer WL. The anti-reflective layer RPL and the window base layer WL can be bonded to each other through the first adhesive layer AL1. The anti-reflective layer RPL can reduce the reflectivity of external light incident from the outside of the display device DD. In one embodiment of the present invention, the anti-reflective layer RPL can also be omitted or built into the display module DM.

[0076] An antireflective layer RPL according to an embodiment of the present invention may include a phase retarder and a polarizer. The phase retarder may be a film type or a liquid crystal coated type, and may include a λ / 2 phase retarder and / or a λ / 4 phase retarder. The polarizer is also a film type, and may include a stretched polymer resin film. The phase retarder and polarizer may also include a protective film. The phase retarder and polarizer themselves or the protective film may be defined as the base layer of the antireflective layer RPL.

[0077] An antireflective layer RPL according to an embodiment of the present invention may include color filters. The color filters may have a predetermined array. The array of color filters can be determined by considering the emission colors of the pixels included in the display module DM. The antireflective layer RPL may also include a black matrix adjacent to the color filters.

[0078] An antireflective layer RPL according to an embodiment of the present invention may include an anti-interference structure. For example, the anti-interference structure may include a first reflective layer and a second reflective layer disposed on different layers from each other. First reflected light and second reflected light reflected from the first reflective layer and the second reflective layer, respectively, can cancel each other out, thereby reducing the reflectivity of external light.

[0079] The display module DM can be disposed below the anti-reflective layer RPL. The display module DM and the anti-reflective layer RPL can be bonded to each other through a second adhesive layer AL2. In one embodiment of the present invention, the second adhesive layer AL2 can be omitted, and the anti-reflective layer RPL can also be disposed directly on the display module DM. The anti-reflective layer RPL can be disposed directly on the input sensing layer ISL included in the display module DM (see reference). Figure 5 The B structure can be a structure included in the display module DM. On the other hand, in this specification, "structure B is directly disposed on structure A" means that no additional adhesive layer or adhesive components are disposed between structure A and structure B. When structure B is directly disposed on structure A, structure B can be formed on the base surface provided by structure A through a continuous process after structure A is formed. That is, the anti-reflective layer RPL can be a layer formed on the input sensing layer ISL of the display module DM through a continuous process.

[0080] The protective layer PL can be configured under the display module DM. The protective layer PL and the display module DM can be bonded to each other through a third adhesive layer AL3. The protective layer PL can be a layer protecting the back of the display module DM.

[0081] The protective layer PL may include a polymer film. For example, the protective layer PL may include a polyimide film, a polyamide film, a polyetheretherketone film, or a polyethylene terephthalate film. The thickness of the polymer film included in the protective layer PL may be, for example, 20 μm to 50 μm. To protect the display module DM from external impacts, the polymer film included in the protective layer PL may be a layer with a high modulus.

[0082] The protective layer PL may also include a buffer layer. In this case, the protective layer PL may comprise sponge, foam, or urethane resin, etc. For example, the protective layer PL may comprise polyurethane foam or thermoplastic polyurethane foam. Alternatively, the protective layer PL may comprise acrylonitrile butadiene styrene copolymer (ABS) foam, polyethylene (PE) foam, ethylene vinyl acetate copolymer (EVA) foam, or polyvinyl chloride (PVC) foam, etc. The protective layer PL may also have a structure in which the aforementioned polymer film is used as a base layer to form a buffer layer. Compared with the aforementioned polymer film, the buffer layer has a lower modulus and lower density, and can be a layer that absorbs external impacts. The thickness of the buffer layer may be 80 μm or more and 120 μm or less.

[0083] The protective layer PL can have a light-absorbing color. For example, the protective layer PL can be black. At least one of the polymer film and buffer layer included in the protective layer PL can contain a black substance. This prevents the components disposed beneath the protective layer PL from being seen from the outside.

[0084] The fourth adhesive layer AL4 can be attached beneath the protective layer PL. The previously described window adhesive layer WAL and the first to fourth adhesive layers AL1, AL2, AL3, and AL4 can contain conventional adhesives or adhesives.

[0085] The first cover plate CL1 and the second cover plate CL2 can be disposed below the fourth adhesive layer AL4. Specifically, the first cover plate CL1 can be disposed in the first non-folding region NFA1, and the second cover plate CL2 can be disposed in the second non-folding region NFA2. The first cover plate CL1 and the second cover plate CL2 can be spaced apart from each other. With the first cover plate CL1 and the second cover plate CL2 spaced apart, a predetermined gap can be defined between the first cover plate CL1 and the second cover plate CL2, and this predetermined gap overlaps with the folding region FA. By defining the predetermined gap between the first cover plate CL1 and the second cover plate CL2, the shape of the display device DD can be changed more easily.

[0086] The first cover plate CL1 and the second cover plate CL2 can be metal plates or plastic plates. For example, the first cover plate CL1 and the second cover plate CL2 can contain stainless steel, aluminum, or alloys thereof. For example, the first cover plate CL1 and the second cover plate CL2 can each contain 304 stainless steel (SUS304). The strength of the first cover plate CL1 and the second cover plate CL2 can be greater than the strength of the display module DM.

[0087] In another embodiment of the invention, the first cover plate CL1 and the second cover plate CL2 may each extend toward the folded region FA. In this case, the first cover plate CL1 and the second cover plate CL2 may not be attached to the fourth adhesive layer AL4 in the folded region FA.

[0088] The first cover plate CL1 and the second cover plate CL2 may each contain a material with an elastic modulus of 60 GPa or higher at room temperature. The first cover plate CL1 and the second cover plate CL2 may each support the structure disposed above. Furthermore, each of the first cover plate CL1 and the second cover plate CL2 can improve the heat dissipation performance of the display device DD.

[0089] Although not illustrated, the display device DD may also include a cover layer attached beneath the first cover plate CL1 and the second cover plate CL2. The cover layer may be attached beneath the first cover plate CL1 and the second cover plate CL2 using a lower adhesive layer comprising conventional adhesives or bonding agents. The lower adhesive layer may not overlap with the folded area FA. The cover layer covers a predetermined gap defined between the first cover plate CL1 and the second cover plate CL2, preventing foreign matter from flowing in through the predetermined gap.

[0090] Although not illustrated, the display device DD may also include a lower plate, a heat dissipation pad, and an insulating film disposed below the first cover plate CL1 and the second cover plate CL2. The display device DD may also include a step compensation component. The display device DD may also include a lower buffer layer disposed below the insulating film or the step compensation component.

[0091] The lower plate can be a structure with predetermined rigidity that prevents deformation of the shape of the structure disposed above it. The lower plate can contain a metal alloy, such as stainless steel.

[0092] A heat dissipation pad can be attached under the lower plate and can be a heat-conducting pad with high thermal conductivity. According to one embodiment, a display device DD includes a heat dissipation pad, thereby enabling easy dissipation of heat generated by the driving and operation of the display device DD to the outside.

[0093] An insulating film can be attached under the heat dissipation pad. This insulating film helps prevent rattling from the display device.

[0094] The step compensation component can be attached below the first cover plate CL1 and the second cover plate CL2. For example, the aforementioned cover layer can be attached to a portion of the first cover plate CL1 and the second cover plate CL2 via a lower adhesive layer, and the step compensation component can be attached to the remaining portion without the lower adhesive layer. The step compensation component can be, for example, a polymer resin film.

[0095] Figure 4 This is a cross-sectional view of a window according to an embodiment of the present invention. A window WP of one embodiment includes a window base layer WL, a window protective layer WPL disposed above the window base layer WL, and a window adhesive layer WAL disposed between the window base layer WL and the window protective layer WPL.

[0096] In one embodiment, a window WP can be defined sequentially along a first direction DR1, comprising a first non-folding region NFA1-WP, a folding region FA-WP, and a second non-folding region NFA2-WP. Alternatively, the first non-folding region NFA1-WP of the window WP may be adjacent to the display device DD (…). Figure 3a The first non-folded region NFA1 () Figure 3a The overlapping portion, the folded area FA-WP of window WP, is with the display device DD ( Figure 3a The folded region FA () Figure 3a The overlapping portion, the second non-folded area NFA2-WP of window WP, is with the display device DD ( Figure 3a The second unfolded region NFA2 () Figure 3a The overlapping parts.

[0097] Reference Figure 4 The window adhesive layer WAL can be configured between the window protective layer WPL and the window base layer WL, and contact the bottom of the window protective layer WPL and the top of the window base layer WL (WL-U). No other structures may be configured below the window base layer WL (WL-L). When applicable to a display device DD (… Figure 3a When the window base layer WL is below WL-L, it can be through the first adhesive layer AL1. Figure 3a ) Attached to the anti-reflective layer RPL ( Figure 3a ) face.

[0098] The window protective layer WPL can be optically transparent. The window protective layer WPL can form the outermost outline of the display device DD. The top of the window protective layer WPL can form the top of the display device DD. That is, in one embodiment of the display device DD, no other structure may be disposed above the window protective layer WPL.

[0099] A window protective layer (WPL) protects the structure disposed beneath it. The WPL may include a protective film with a modulus of elasticity of 15 GPa or less at room temperature. For example, the WPL may contain polyethylene terephthalate (PET). The thickness of the WPL may be from 40 μm to 150 μm, but is not limited to this. In one embodiment, the WPL may also have a multilayer structure. For example, the WPL may include multiple polymer resin films bonded together by an adhesive or bonding agent. For example, the WPL may include a first protective layer, a second protective layer, and a protective adhesive layer bonded thereto. In the WPL, the thickness of each of the first and second protective layers may be from 30 μm to 120 μm.

[0100] In addition to the protective film, a hard coating layer or fingerprint prevention layer can be added above and / or below the window protective layer (WPL) to improve chemical resistance, abrasion resistance, and other properties. The hard coating layer can be a layer formed from a hard coating composition containing at least one of organic compositions, inorganic compositions, and organic-inorganic composite compositions. For example, the hard coating layer can be formed from a hard coating composition containing at least one of acrylate compounds, siloxane compounds, or silsesquioxane compounds. Furthermore, the hard coating layer may also contain inorganic particles. The hardness of the hard coating layer can be further improved by the inorganic particles. The inorganic particles may contain at least one of SiO2, TiO2, Al2O3, ZrO2, ZnO, AlN, and Si3N4. Additionally, to improve the dispersion of the inorganic particles in the hard coating composition, surface treatment with organic materials such as silanes can be performed.

[0101] The window base layer (WL) can be configured below the window protective layer (WPL). The window base layer (WL) can include an upper WL-U and a lower WL-L. The window protective layer (WPL) can be attached to the upper WL-U of the window base layer (WL) via the window adhesive layer (WAL).

[0102] The window base layer WL may include a folded portion WL-F and non-folded portions WL-NF1 and WL-NF2. The folded portion WL-F may overlap with the folded area FA-WP of the window WP. The non-folded portions WL-NF1 and WL-NF2 may overlap with the first non-folded area NFA1-WP and the second non-folded area NFA2-WP of the window WP. The non-folded portions WL-NF1 and WL-NF2 may include a first non-folded portion WL-NFA1 overlapping the first non-folded area NFA1-WP and a second non-folded portion WL-NFA2 overlapping the second non-folded area NFA2-WP.

[0103] The window substrate (WL) can be optically transparent. The window protective layer (WPL) and the window substrate (WL) can be bonded together via the window adhesive layer (WAL). The window substrate (WL) can contain an optically transparent insulating material. For example, the window substrate (WL) can include a glass substrate or a polymer resin film. The thickness of the window substrate (WL) can be less than 80 μm, for example, it can be 40 μm, but the thickness of the window substrate (WL) is not limited to this. For example, the window substrate (WL) can include a thin glass substrate with a thickness of 40 μm. The window substrate (WL) can include ultra-thin glass (UTG).

[0104] When the window substrate WL is a polymer resin film, the window substrate WL may include a polyimide (PI) film or a polyethylene terephthalate (PET) film. However, it is not limited to this, and the window substrate WL may include a film comprising at least one of polyamide, polyimide, polyacrylate, polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene naphthalate (PEN), polyvinylidene chloride, polyvinylidene difluoride (PVDF), polystyrene, and ethylene vinyl alcohol copolymer.

[0105] The window substrate (WL) can have a multi-layer or single-layer structure. For example, the window substrate (WL) may include multiple polymer resin films bonded together with an adhesive, or a glass substrate and a polymer resin film bonded together with an adhesive.

[0106] The window adhesive layer (WAL) can have a thickness of 10 μm or more but less than 30 μm. When the thickness of the window adhesive layer (WAL) is less than 10 μm, sufficient adhesion cannot be ensured to bond the window base layer (WL) and the window protective layer (WPL), potentially causing damage due to friction between the window base layer (WL) and the window protective layer (WPL) during folding. When the thickness of the window adhesive layer (WAL) exceeds 30 μm, the folding characteristics of the display device (DD) may be reduced.

[0107] The window adhesive layer (WAL) may contain a polymer resin. The WAL may be an adhesive layer containing at least one of, for example, acrylic resins, silicone resins, urethane resins, and epoxy resins.

[0108] The window adhesive layer (WAL) may contain a UV-curable adhesive. The window adhesive layer (WAL) may be an adhesive layer formed by polymerization and curing through at least one of free radical polymerization or cationic polymerization.

[0109] Alternatively, the window adhesive layer (WAL) can be formed from an adhesive composition containing a radical polymerizable compound having radical polymerizable groups. For example, the radical polymerizable compound can be an propylene compound, specifically an acrylate compound or a methacrylate compound.

[0110] The adhesive composition forming the window adhesive layer (WAL) may contain photoinitiators, etc. In addition to initiators, the adhesive composition may also include known additives such as photosensitizers, silane coupling agents, plasticizers, and defoamers.

[0111] Figure 5 This is a schematic cross-sectional view of a display module according to an embodiment of the present invention.

[0112] Reference Figure 5 The display module (DM) may include a display panel (DP) and an input sensing layer (ISL).

[0113] According to an embodiment of the present invention, the display panel DP can be a light-emitting display panel, and is not particularly limited. For example, the display panel DP can be an organic light-emitting display panel or a quantum dot light-emitting display panel. The light-emitting layer of an organic light-emitting display panel can contain organic light-emitting materials. The light-emitting layer of a quantum dot light-emitting display panel can contain quantum dots and quantum rods, etc. Hereinafter, the display panel DP will be described using an organic light-emitting display panel.

[0114] The display panel (DP) may include a base layer (BL), a circuit layer (ML), a light-emitting element layer (EL), and a thin-film encapsulation layer (TFE).

[0115] The base layer BL can comprise a flexible material; for example, the base layer BL can be a plastic substrate. The plastic substrate can comprise at least one of acrylic resins, methacrylic resins, polyisoprene resins, ethylene resins, epoxy resins, urethane resins, cellulose resins, siloxane resins, polyimide resins, polyamide resins, and benzoic acid ester resins. For example, the base layer BL can comprise a single layer of polyimide resin. However, the invention is not limited thereto; the base layer BL can be a laminated structure comprising multiple insulating layers.

[0116] The circuit layer ML can be configured on top of the base layer BL. The circuit layer ML may include multiple insulating layers, multiple conductive layers, and semiconductor layers.

[0117] The light-emitting element layer EL can be disposed above the circuit layer ML. The light-emitting element layer EL can include display elements, such as organic light-emitting diodes.

[0118] A thin-film encapsulation layer (TFE) seals the light-emitting element (EL) layer. The TFE layer may include multiple inorganic layers and at least one organic layer disposed between them.

[0119] The input sensing layer (ISL) can be directly disposed on the thin-film encapsulation layer (TFE). That is, the input sensing layer (ISL) can be formed on the TFE through a continuous process. However, the present invention is not limited to this; the input sensing layer (ISL) can also be formed through a separate process and then bonded to the display panel (DP) using an adhesive.

[0120] Hereinafter, a method for manufacturing a window suitable for a display device and an apparatus for manufacturing a window according to an embodiment of the present invention will be described.

[0121] A window manufacturing apparatus according to one embodiment includes a transport stage for placing a target substrate, an adsorption stage for adsorbing the target substrate, and an attachment device for attaching a protective film to the target substrate.

[0122] Figure 6a This is a perspective view of a portion of the structure of a window manufacturing apparatus according to an embodiment of the present invention. Figure 6b This is a cross-sectional view of a portion of the structure of a window manufacturing apparatus according to an embodiment of the present invention. Figure 6a as well as Figure 6b A transfer table LT in a window manufacturing apparatus according to an embodiment of the present invention is shown.

[0123] Reference Figure 6a as well as Figure 6b A window manufacturing apparatus according to one embodiment includes a transport stage LT for placing a target substrate. The target substrate may be to which a window protective layer WPL is attached (… Figure 4 The previous window base layer WL ( Figure 4 ).

[0124] The transfer table LT includes a first part LT-P1 and a second part LT-P2. The second part LT-P2 may include a first sub-part LT-P21 and a second sub-part LT-P22.

[0125] The first part LT-P1 is the portion with a smaller thickness compared to the second part LT-P2. That is, the first part LT-P1 is the portion whose width in the thickness direction, i.e., the third direction DR3, is smaller than that of the second part LT-P2. It can be that the first part LT-P1 has a first thickness T1, and the second part LT-P2 has a second thickness T2, where the second thickness T2 is greater than the first thickness T1.

[0126] The first part, LT-P1, can be used when an object substrate, i.e., a window base layer (WL), is placed. Figure 4 ) window base layer WL ( Figure 4 The folded part WL-F ( Figure 4 The overlapping portion. The width of the first portion LT-P1 in the first direction DR1 can be determined according to the folded portion WL-F ( Figure 4 The width of the first portion LT-P1 is determined by the width of the first portion LT-P1. In one embodiment, the first width W1 can be more than 1% and less than 20% of the entire width of the transport table LT, i.e., the second width W2. The first width W1 can be, for example, more than about 2 mm and less than about 15 mm.

[0127] A mounting surface SS for placing the target substrate is defined in the transport stage LT. The mounting surface SS can be substantially the top surface of the second portion LT-P2. Since the first portion LT-P1 has a first thickness T1 that is smaller than the second thickness T2 of the second portion LT-P2, the top surface of the first portion LT-P1 can be a non-contact surface NCS that does not contact the target substrate when it is placed. When the target substrate is placed on the transport stage LT, the target substrate can contact the second portion LT-P2 but not the first portion LT-P1.

[0128] The mounting surface SS can be a surface with low surface roughness. In one embodiment, the mounting surface SS can be a surface with a surface roughness of 10 micrometers or more and 50 micrometers or less. The mounting surface SS can be a surface that has been anodized to reduce surface roughness. Alternatively, the mounting surface SS is a surface that has been surface-polished after the anodizing process. With a low surface roughness of the mounting surface SS, damage to the surface of the target substrate placed on the transport stage LT can be prevented.

[0129] Although not illustrated, the transport stage LT may include an adsorption device for securing a placed substrate. For example, multiple adsorption ports may be defined in the transport stage LT. These multiple adsorption ports defined in the transport stage LT may be defined in a second portion LT-P2, including the placement surface SS. Adsorption ports may not be defined in a first portion LT-P1, including the non-contact surface NCS.

[0130] Figure 7a This is a perspective view of a portion of the structure of a window manufacturing apparatus according to an embodiment of the present invention. Figure 7bThis is a cross-sectional view of a portion of the structure of a window manufacturing apparatus according to an embodiment of the present invention. Figure 7a as well as Figure 7b The image shows an adsorption stage ST in a window manufacturing apparatus according to an embodiment of the present invention.

[0131] Reference Figure 7a as well as Figure 7b A window manufacturing apparatus according to one embodiment includes an adsorption stage ST for adsorbing a target substrate. The target substrate may be to which a window protective layer WPL is attached. Figure 4 The previous window base layer WL ( Figure 4 ).

[0132] The adsorption stage ST includes a first adsorption section ST-P1 and second adsorption sections ST-P21 and ST-P22. The second adsorption sections ST-P21 and ST-P22 may include the first sub-adsorption section ST-P21 and the second sub-adsorption section ST-P22.

[0133] Multiple adsorption ports SH can be defined in the adsorption stage ST for adsorbing the target substrate. Through the operation of the multiple adsorption ports SH, the target substrate can be adsorbed onto the adsorption stage ST.

[0134] It is possible that multiple adsorption ports SH may be defined only in the second adsorption sections ST-P21 and ST-P22, but not in the first adsorption section ST-P1. Figure 7a as well as Figure 7b The illustration shows 16 adsorption ports SH, with 8 rows and 2 columns, defined in each of the first sub-adsorption section ST-P21 and the second sub-adsorption section ST-P22, but it is not limited thereto, and the number and array of adsorption ports SH can be changed.

[0135] Refer to together Figure 6a , Figure 6b , Figure 7a as well as Figure 7b The adsorption stage ST can be a structure that adsorbs a substrate disposed on a transport stage LT for subsequent processing. In one state where the substrate disposed on the transport stage LT is adsorbed by the adsorption stage ST, the first adsorption portion ST-P1 of the adsorption stage ST overlaps with the first portion LT-P1 of the transport stage LT, and the second adsorption portions ST-P21 and ST-P22 of the adsorption stage ST overlap with the second portion LT-P2 of the transport stage LT. Therefore, in one state where the substrate disposed on the transport stage LT is adsorbed by the adsorption stage ST, the multiple adsorption ports SH, defined only in the second adsorption portions ST-P21 and ST-P22 and not in the first adsorption portion ST-P1, can overlap only with the second portion LT-P2 of the transport stage LT and not with the first portion LT-P1.

[0136] Refer again Figure 7a as well as Figure 7b In the adsorption stage ST, the adsorption surface US that the target substrate is adsorbed and contacts can be defined. The adsorption surface US can be substantially the underside of the adsorption stage ST. The adsorption surface US can be the underside of the first adsorption portion ST-P1 and the second adsorption portions ST-P21 and ST-P22.

[0137] The adsorption surface US can be a surface with low surface roughness. In one embodiment, the adsorption surface US can be a surface with a surface roughness of 10 micrometers or more and 50 micrometers or less. The adsorption surface US can be a surface that has been anodized to reduce surface roughness. Alternatively, the adsorption surface US can be a surface that has been surface-polished after the anodizing process. With a low surface roughness of the adsorption surface US, damage to the surface of the substrate to which the adsorption is performed can be prevented.

[0138] Figures 8a to 8f These are cross-sectional views showing a window manufacturing method according to an embodiment of the present invention. Figures 8a to 8f The process of attaching a window protective layer WPL to a window base layer WL by a window manufacturing apparatus according to an embodiment of the present invention, and the process of measuring the bending strength of the manufactured window are shown in sequence.

[0139] Reference Figure 8a as well as Figure 8b A window manufacturing method according to one embodiment includes the step of placing a target substrate on a transport stage LT. The target substrate may be a window base layer WL. As mentioned above, the window base layer WL may include a folded portion WL-F and non-folded portions WL-NF1 and WL-NF2.

[0140] The transfer stage LT may include a first transfer stage LT1 and a second transfer stage LT2. The object substrate, i.e., the window base layer WL, can be placed on the first transfer stage LT1 and then transferred to the second transfer stage LT2. During the transfer, the window base layer WL can be positioned such that its lower part WL-L contacts the first transfer stage LT1, and its upper part WL-U contacts the second transfer stage LT2.

[0141] The first transport stage LT1 may include an 11th portion LT1-P1 and 21st portions LT1-P21 and LT1-P22, and the second transport stage LT2 may include a 12th portion LT2-P1 and 22nd portions LT2-P21 and LT2-P22. The 11th portion LT1-P1 may be thinner than the 21st portions LT1-P21 and LT1-P22, and the 12th portion LT2-P1 may be thinner than the 22nd portions LT2-P21 and LT2-P22. Therefore, the first mounting surface SS1 of the first transport stage LT1 may be defined as the upper surface of the 21st portions LT1-P21 and LT1-P22, and the second mounting surface SS2 of the second transport stage LT2 may be defined as the upper surface of the 22nd portions LT2-P21 and LT2-P22. The object substrate, i.e., the window base layer WL, may contact the first mounting surface SS1 and the second mounting surface SS2. It can be placed such that the lower part of the window base WL (WL-L) contacts the first placement surface SS1, and the upper part of the window base WL (WL-U) contacts the second placement surface SS2.

[0142] The window base layer WL may not contact the top of the 11th part LT1-P1 and the 12th part LT2-P1. In the plane, the folded portion WL-F in the window base layer WL may overlap with the 11th part LT1-P1 and the 12th part LT2-P1, thereby the folded portion WL-F may not contact the first transport table LT1 and the second transport table LT2.

[0143] According to one embodiment, the window manufacturing apparatus may further include a transport device RF for transporting a window substrate WL to a transport table LT. The transport device RF can attract the window substrate WL and move it toward a first transport table LT1. The transport device RF may be, for example, a multi-joint robotic arm. The window substrate WL may move from the first transport table LT1 to a second transport table LT2 after being moved to the first transport table LT1 by the transport device RF. During the step of the window substrate WL moving from the first transport table LT1 to the second transport table LT2, the window substrate WL may come into contact with both the first transport table LT1 and the second transport table LT2. The window substrate WL may rotate 180° while in contact with the respective mounting surfaces SS1 and SS2 of the first transport table LT1 and the second transport table LT2.

[0144] Reference Figure 8b , Figure 8c as well as Figure 8d A window manufacturing method according to one embodiment includes the step of moving an object substrate placed on a transport stage LT by adsorption onto an adsorption stage ST. The object substrate, i.e., the window substrate WL, can be moved through a plurality of adsorption ports SH defined on the adsorption stage ST. Figure 7a Adsorption.

[0145] In the adsorption step where the window substrate WL, placed on the transfer stage LT, is adsorbed by the adsorption stage ST, the window substrate WL can contact the bottom of the adsorption stage ST. With the window substrate WL adsorbed on the adsorption stage ST, the bottom surface WL-L of the window substrate WL can contact the adsorption surface US of the adsorption stage ST. Figure 7b )touch.

[0146] In the adsorption step, the first adsorption portion ST-P1 of the adsorption stage ST may overlap with the 12th portion LT2-P1 of the second transport stage LT2, and the second adsorption portions ST-P21 and ST-P22 of the adsorption stage ST may overlap with the 22nd portions LT2-P21 and LT2-P22 of the second transport stage LT2. Thus, in a state where the window substrate WL disposed on the second transport stage LT2 is adsorbed by the adsorption stage ST, the multiple adsorption ports SH, defined only in the second adsorption portions ST-P21 and ST-P22 and not in the first adsorption portion ST-P1, may overlap only with the 22nd portions LT2-P21 and LT2-P22 of the second transport stage LT2 and not with the 12th portion LT2-P1.

[0147] In the adsorption step, the first adsorption portion ST-P1 may overlap with the folded portion WL-F of the window base layer WL, and the second adsorption portions ST-P21 and ST-P22 may overlap with the non-folded portions WL-NF1 and WL-NF2 of the window base layer WL. Thus, in a state where the window base layer WL is adsorbed by the adsorption stage ST, the multiple adsorption ports SH, defined only by the second adsorption portions ST-P21 and ST-P22 and not by the first adsorption portion ST-P1, may overlap only with the non-folded portions WL-NF1 and WL-NF2 and not with the folded portion WL-F.

[0148] Reference Figure 8c , Figure 8d as well as Figure 8e A window manufacturing method according to one embodiment includes the step of attaching a protective film to a target substrate adsorbed by an adsorption stage ST.

[0149] With the target substrate, i.e., the window base layer WL, adsorbed on the adsorption stage ST, the window protective layer WPL can be attached to the upper surface WL-U of the window base layer WL via the attachment device LU. The attachment device LU can be, for example, a lamination device. The window protective layer WPL can also be attached to the window base layer WL via the window adhesive layer WAL.

[0150] Reference Figure 8e as well as Figure 8fAccording to one embodiment, the window manufacturing apparatus may further include a bending evaluation device (FMD) for measuring the bending strength of a window WP with a window protective layer (WPL) attached. The bending evaluation device (FMD) may be a device that, after the window protective layer (WPL) is attached to the window base layer (WL), folds the window WP once around an evaluation folding axis (FX-a) or repeatedly folds it to achieve a predetermined curvature. The window WP with the window protective layer (WPL) attached to the window base layer (WL) can be used in a display device (DD) after the bending strength is measured based on the bending evaluation device (FMD). Figure 3a It is combined with the display module DM and other structures. According to one embodiment, the window manufacturing method may include a visual inspection step of checking the condition of the window protective layer WPL before the bending strength measurement step based on the bending evaluation device FMD.

[0151] According to one embodiment, a transport table included in a window manufacturing apparatus has a thickness that overlaps with the folded portion of the target substrate, i.e., the window base layer, less than the thickness of the portion overlapping with the non-folded portion, such that the portion overlapping the folded area does not contact the target substrate. More specifically, the thickness of a first portion of the transport table is less than the thickness of a second portion, and it can be configured such that, with the window base layer placed on the transport table, the first portion does not contact the folded portion of the window base layer, and the second portion supports the non-folded portion of the window base layer. This prevents damage to the folded portion when the window base layer is moved while placed on the transport table, thereby improving the folding reliability and durability of the window manufactured by the window manufacturing apparatus.

[0152] Furthermore, in one embodiment, no adsorption port is formed in the portion where the adsorption stage in the window manufacturing apparatus overlaps with the folded portion of the target substrate, i.e., the window base layer, thus preventing damage to the folded portion based on the adsorption process. More specifically, no adsorption port is provided in the first adsorption portion of the adsorption stage, but only in the second adsorption portion. This prevents damage to the folded portion without compromising the adsorption performance of the adsorption stage, thereby improving the folding reliability and durability of the window manufactured by the window manufacturing apparatus.

[0153] In existing window manufacturing apparatuses, to prevent damage to the target substrate caused by the surface of the transport stage during transport, methods are employed to reduce friction between the target substrate and the transport stage by providing a porous film or the like on the placement surface. However, problems arise such as damage to the folded portion of the window due to foreign matter remaining from the porous film during subsequent processes such as bending evaluation. In a window manufacturing apparatus according to an embodiment of the present invention, while the first part of the transport stage does not contact the target substrate, i.e., the window substrate, an adsorption port is not provided in the first adsorption part of the adsorption stage. Therefore, even without providing a porous film or the like, damage to the window substrate transported and adsorbed by the window manufacturing apparatus can be prevented. As a result, the folding reliability and durability of the window manufactured by the window manufacturing apparatus can be improved, and the reliability of the display device manufactured including the apparatus can also be improved.

[0154] The above description refers to preferred embodiments of the present invention. Those skilled in the art or with ordinary knowledge of the art will understand that various modifications and alterations can be made to the present invention without departing from the concept and scope of the invention as set forth in the claims. Therefore, the technical scope of the present invention should not be limited by the details described in the specification, but rather determined by the claims.

Claims

1. A window manufacturing apparatus, wherein, include: A transport table includes a first portion located in the center and not in contact with the target substrate when the target substrate is placed thereon, and a second portion disposed on both sides of the first portion and defining a placement surface for placing the target substrate, and being thicker than the first portion and in contact with the target substrate when the target substrate is placed thereon. An adsorption stage defines a plurality of adsorption ports that contact and adsorb the substrate to be adsorbed; as well as An attachment device applies a protective film to the substrate being adsorbed onto the adsorption stage. When the object substrate placed on the transport table is adsorbed by the adsorption table, the plurality of adsorption ports are defined on the plane as overlapping with the second part of the transport table but not overlapping with the first part.

2. The window manufacturing apparatus according to claim 1, wherein, The target substrate includes a folded portion and a non-folded portion adjacent to the folded portion. With the object substrate placed on the transport table, the folded portion overlaps with the first portion, and the non-folded portion overlaps with the second portion.

3. The window manufacturing apparatus according to claim 2, wherein, When the target substrate is adsorbed onto the adsorption stage, the plurality of adsorption ports overlap with the non-folded portion.

4. The window manufacturing apparatus according to claim 1, wherein, The substrate includes glass.

5. The window manufacturing apparatus according to claim 1, wherein, When the object substrate is placed on the transport table, the object substrate is in contact with the top surface of the second part but not with the top surface of the first part.

6. The window manufacturing apparatus according to claim 1, wherein, When the target substrate is adsorbed onto the adsorption stage, the target substrate is in contact with the bottom of the adsorption stage.

7. The window manufacturing apparatus according to claim 6, wherein, The surface roughness of the lower part of the adsorption stage is greater than 10 micrometers and less than 50 micrometers.

8. The window manufacturing apparatus according to claim 1, wherein, The window manufacturing apparatus further includes a transport device for transporting the object substrate to the transport table and placing it on the placement surface.

9. The window manufacturing apparatus according to claim 8, wherein, The transport platform includes: A first transfer table, which receives the object substrate from the transfer device and places it on the first transfer table; and The second transport table rotates the object substrate placed on the first transport table and then places it on the second transport table.

10. The window manufacturing apparatus according to claim 1, wherein, The protective film contains polyethylene terephthalate.

11. The window manufacturing apparatus according to claim 1, wherein, The window manufacturing apparatus further includes a bending evaluation device for measuring the bending strength of the target substrate to which the protective film is attached.

12. A method for manufacturing a window, wherein, include: The step of placing an object substrate onto a transport table comprising a first portion in which the object substrate does not contact when it is placed, and a second portion disposed on both sides of the first portion and being thicker than the first portion, and in contact with the object substrate when it is placed. The step of adsorbing the object substrate placed on the transport table through a plurality of adsorption ports defined in the adsorption stage; and The step of attaching a protective film to the target substrate adsorbed on the adsorption stage. The second portion of the transport table defines a placement surface for contacting and placing the object substrate. In the step of adsorbing the object substrate onto the adsorption stage, on a plane, the plurality of adsorption ports are defined to overlap with the second portion of the transport stage but not with the first portion.

13. The window manufacturing method according to claim 12, wherein, A folded portion and a non-folded portion adjacent to the folded portion are defined in the object substrate. In the step of placing the object substrate onto the transport table, the folded portion overlaps with the first portion, and the non-folded portion overlaps with the second portion.

14. The window manufacturing method according to claim 13, wherein, In the step of adsorbing the object substrate onto the adsorption stage, the plurality of adsorption ports overlap with the non-folded portion.

15. The window manufacturing method according to claim 12, wherein, In the step of placing the object substrate onto the transport table, the object substrate contacts the top surface of the second portion but does not contact the top surface of the first portion.

16. The window manufacturing method according to claim 12, wherein, The substrate includes ultrathin film reinforced glass.

17. The window manufacturing method according to claim 12, wherein, The protective film contains polyethylene terephthalate.

18. A method for manufacturing a display device, wherein, include: The steps for preparing a window, wherein the window includes a first non-foldable area, a foldable area, and a second non-foldable area arranged sequentially along a first direction; Steps to prepare the display module; as well as Combining the steps of the window and the display module, The steps for preparing the window include: The step of placing an object substrate onto a transport table comprising a first portion in which the object substrate does not contact when it is placed, and a second portion disposed on both sides of the first portion and being thicker than the first portion, and in contact with the object substrate when it is placed. The step of adsorbing the object substrate placed on the transport table through a plurality of adsorption ports defined in the adsorption stage; and The step of attaching a protective film to the target substrate adsorbed on the adsorption stage. The second portion of the transport table defines a placement surface for contacting and placing the object substrate. In the step of adsorbing the object substrate onto the adsorption stage, on a plane, the plurality of adsorption ports are defined to overlap with the second portion of the transport stage but not with the first portion.

19. The method for manufacturing a display device according to claim 18, wherein, In the object substrate, a folded portion overlapping the folded region and an unfolded portion overlapping the first unfolded region and the second unfolded region are defined. In the step of placing the object substrate onto the transport table, the folded portion overlaps with the first portion, and the non-folded portion overlaps with the second portion.

20. The method for manufacturing a display device according to claim 19, wherein, In the step of adsorbing the object substrate onto the adsorption stage, the plurality of adsorption ports overlap with the non-folded portion.

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