Window manufacturing apparatus and window manufacturing method

Abstract

The invention relates to a window manufacturing method and a window manufacturing apparatus. The window manufacturing method comprises the following steps: preparing a groove; arranging a preliminary window including a first region and a second region in the slot; arranging an upper film defining an opening on the preliminary window; preparing a control module comprising a first pad and a second pad; moving the control module such that the first pad and the second pad are disposed inside the opening of the upper film; providing an etchant to the trench; performing first etching on the part, not in contact with the first pad and the second pad, of the preliminary window; moving the control module such that the first portion is exposed from the opening of the upper film; performing second etching on the part, not in contact with the first pad and the second pad, of the preliminary window; and forming a window.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to and all benefits derived therefrom of Korean Patent Application No. 10-2024-0119982, filed on September 4, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The embodiments of this disclosure described herein relate to a window manufacturing apparatus and a window manufacturing method using said window manufacturing apparatus. In detail, the embodiments of this disclosure described herein relate to a window manufacturing apparatus and a window manufacturing method such that the etched portions of the window have a gentle slope. Background Technology

[0004] Electronic devices provide information to users by displaying various images on a screen. Typically, electronic devices display information within a designated screen. Recently, flexible electronic devices, including foldable flexible display panels, have been developed. Unlike rigid electronic devices, flexible electronic devices can be folded or rolled up. According to existing technology, flexible electronic devices with various shapes can be carried without being limited by screen size, thus improving user convenience.

[0005] The electronic device includes a display panel and a window mounted on the display panel and protecting the display panel. Summary of the Invention

[0006] Embodiments of this disclosure provide a window manufacturing apparatus in which the etched portion of the window has a gentle slope.

[0007] Embodiments of this disclosure also provide a method for manufacturing a window, such that the etched portion of the window has a gentle slope.

[0008] In embodiments of this disclosure, a window manufacturing method includes: preparing a groove defining a recess; arranging a preliminary window in the recess of the groove, the preliminary window including a first region and a plurality of second regions adjacent to (closely adjacent to) the first region, the first region being located between the plurality of second regions; arranging an upper film on the preliminary window, the upper film defining an opening overlapping the first region of the preliminary window; preparing a control module including a pad attachment portion, the control module including a first pad, a second pad spaced apart from the first pad, and a pad attachment portion coupled to the first pad and the second pad; moving the control module such that the first pad and the second pad are arranged inside the opening of the upper film; providing an etchant to the recess of the groove; performing a first etching on a portion of the preliminary window that does not contact the first pad and the second pad; moving the control module in a direction away from the preliminary window such that a first portion of the first pad and a first portion of the second pad are exposed from the opening of the upper film; performing a second etching on a portion of the preliminary window that does not contact the first pad and the second pad; and forming a window from the preliminary window.

[0009] In one embodiment, providing etchant to the groove of the trench may include: bringing the first pad, the second pad, and the pad attachment portion into contact with the etchant.

[0010] In one embodiment, the movement control module causing the first and second pads to be positioned inside the opening of the upper membrane may include: bringing the first and second pads into contact with the preliminary window.

[0011] In one embodiment, the movement control module causing the first pad and the second pad to be arranged inside the opening of the upper film may include: the movement control module causing the first pad and the second pad to cover the end of the defined opening of the upper film.

[0012] In an embodiment, the first side surface of the first pad and the second side surface of the second pad may face each other, and the distance between the first side surface and the second side surface is constant or decreasing in the thickness direction of the initial window.

[0013] In an embodiment, the initial etching of the portion of the preliminary window that does not contact the first pad and the second pad may include: forming a first-1 inner surface adjacent to the first pad, a second-1 inner surface adjacent to the second pad, and a first lower surface extending to the first-1 inner surface and the second-1 inner surface.

[0014] In an embodiment, a second etching of the portion of the preliminary window that does not contact the first and second pads may include: forming a first-2 inner surface adjacent to the first pad, a second-2 inner surface adjacent to the second pad, and a second lower surface extending to the first-2 inner surface and the second-2 inner surface.

[0015] In an embodiment, the first width, which is the maximum distance between the first-1 inner surface and the second-1 inner surface, can be smaller than the second width, which is the maximum distance between the first-2 inner surface and the second-2 inner surface.

[0016] In an embodiment, the first depth, which is the distance from the upper surface of the preliminary window to the first lower surface, may be less than the second depth, which is the distance from the upper surface of the preliminary window to the second lower surface.

[0017] In one embodiment, moving the control module in a direction away from the initial window may include moving the control module in a direction away from the etchant.

[0018] In an embodiment, moving the control module in a direction away from the preliminary window may include: alternately repeating a first mode of stopping the movement of the control module and a second mode of moving the control module in a direction away from the preliminary window.

[0019] In an embodiment, after a second etching of the preliminary window, the window manufacturing method may further include: moving the control module away from the preliminary window so that the second portion of the first pad and the second portion of the second pad are exposed from the opening of the upper film; and performing a third etching on the portion of the preliminary window that does not contact the first pad and the second pad, wherein the volume of the second portion of the first pad and the second portion of the second pad is greater than the volume of the first portion of the first pad and the first portion of the second pad.

[0020] In an embodiment, forming a window from an initial window may include: forming a side surface with a slope that is the lower surface of the window.

[0021] In an embodiment, forming a window from an initial window may include: forming a lower surface of a flat plane for the window.

[0022] In one embodiment, forming a window from a preliminary window may include: forming a side surface and a bottom surface of the window such that the angle defined between the side surface and the bottom surface of the window is an obtuse angle.

[0023] In one embodiment, the window manufacturing apparatus includes: a groove containing an etchant and forming a preliminary window in the groove; a control module including a first pad and a second pad spaced apart from the first pad; a horizontal movement portion configured to move the control module in a direction parallel to a first direction or in a second direction perpendicular to the first direction; and a vertical movement portion configured to move the control module in a third direction parallel to and perpendicular to the first and second directions, wherein a first side surface of the first pad and a second side surface of the second pad face each other, and the distance between the first side surface and the second side surface is constant or decreasing in the third direction.

[0024] In an embodiment, the vertical movement portion may include a first mode that stops the movement of the control module and a second mode that moves the control module upward in a third direction, wherein the first mode and the second mode may be repeated alternately.

[0025] In an embodiment, each of the first pad and the second pad may include an elastic material.

[0026] In an embodiment, the distance between the first side surface and the second side surface can decrease continuously upwards in a third direction.

[0027] In an embodiment, each of the first side surface and the second side surface may include a first pad portion and a second pad portion, wherein in the first pad portion, the distance between the first side surface and the second side surface decreases in the third direction; and in the second pad portion, the distance between the first side surface and the second side surface is constant in the third direction. Attached Figure Description

[0028] The above and other embodiments and features of this disclosure will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

[0029] Figure 1 This is a perspective view of an electronic device according to the present disclosure.

[0030] Figure 2 This is a perspective view showing the folded state of the electronic device according to this disclosure.

[0031] Figure 3 This is an exploded perspective view of the electronic device according to the present disclosure.

[0032] Figure 4 It is in accordance with this disclosure along Figure 3 The cross-sectional view of the window intercepted by line I-I' is shown in the figure.

[0033] Figure 5 This is a perspective view showing a window manufacturing apparatus according to the present disclosure.

[0034] Figure 6 This is a schematic perspective view showing a portion of the vertically moving part and the control module of the window manufacturing apparatus according to the present disclosure.

[0035] Figure 7 It is a cross-sectional view of the control module according to this disclosure.

[0036] Figure 8 This is a flowchart illustrating a window manufacturing method according to the present disclosure.

[0037] Figures 9A to 9E This is a cross-sectional view showing some operations of the window manufacturing method according to this disclosure. Detailed Implementation

[0038] In the specification, when it is mentioned that the first component (or area, layer or part, etc.) is "connected" or "coupled" to the second component, it means that the first component is directly on / directly connected to / directly coupled to the second component, or that the third component is located between the first component and the second component.

[0039] The same reference numerals refer to the same components. Furthermore, in the accompanying drawings, the thickness, scale, and dimensions of the components are exaggerated for the sake of effective description of the technical content. The term "and / or" includes all or one combination that can be defined by the associated components.

[0040] Although the terms "first," "second," etc., can be used to describe various components, these components should not be limited by these terms. These terms are used only to distinguish one component from another. For example, without departing from the scope of this disclosure, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. Unless the context clearly indicates otherwise, singular expressions include plural expressions.

[0041] Furthermore, terms such as "below," "under," "above," and "on" are used to describe the relationships between the components shown in the accompanying drawings. Conceptually relative terms are described based on the directions shown in the drawings.

[0042] It will be understood that the terms “comprising,” “including,” “having,” etc., indicate the presence of the features, quantities, steps, operations, elements and / or components described in the specification, or any combination thereof, but do not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components and / or combinations thereof.

[0043] 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 disclosure pertains. Furthermore, unless expressly defined herein, terms (such as those defined in a general dictionary) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an overly idealized or overly formalized sense.

[0044] Figure 1 This is a perspective view of the electronic device ED according to the present disclosure.

[0045] Reference Figure 1 The electronic device ED can have a quadrilateral shape, for example, a rectangular shape having a short side extending in a first direction DR1 and a long side extending in a second direction DR2. However, this disclosure is not limited to this, and the electronic device ED can have various shapes, such as circular shapes and other polygonal shapes. The electronic device ED can be a flexible electronic device.

[0046] The electronic device ED may include a folded region FA and multiple non-folded regions NFA1 and NFA2. The non-folded regions NFA1 and NFA2 may include a first non-folded region NFA1 and a second non-folded region NFA2. The folded region FA may be disposed between the first non-folded region NFA1 and the second non-folded region NFA2. The first non-folded region NFA1, the folded region FA, and the second non-folded region NFA2 may be arranged in a second direction DR2.

[0047] An exemplary illustration shows a folded region FA and two non-folded regions NFA1 and NFA2, but the number of folded regions FA and non-folded regions NFA1 and NFA2 is not limited thereto. In embodiments, for example, the electronic device ED may include more than two non-folded regions and multiple folded regions arranged between the multiple non-folded regions.

[0048] The upper surface of the electronic device ED can be defined as a display surface DS and can have a plane defined by a first direction DR1 and a second direction DR2. The image IM generated by the electronic device ED can be provided to the user through the display surface DS.

[0049] The display surface DS may include a display area DA and a non-display area NDA surrounding the display area DA. The display area DA displays the image IM, and the non-display area NDA does not display the image IM. The non-display area NDA may surround the display area DA and may define the edge of the electronic device ED printed in a predetermined color.

[0050] Figure 2 This is a perspective view showing the folded state of the electronic device ED according to the present disclosure.

[0051] Reference Figure 2 The electronic device ED can be a foldable or non-foldable electronic device ED. In an embodiment, for example, the folding region FA can be bent relative to a folding axis FX parallel to the first direction DR1, and therefore, the electronic device ED can be folded. The folding axis FX can be defined as an axis parallel to the shorter side of the electronic device ED.

[0052] When the electronic device ED is folded, the first non-folded region NFA1 and the second non-folded region NFA2 can face each other, and the electronic device ED can fold inward, so that the display surface DS (refer to) Figure 1 The display surface DS (refer to...) is not exposed to the outside. However, this disclosure is not limited thereto. In embodiments, for example, the electronic device ED can be folded outwards, such that the display surface DS (refer to...) is not exposed to the outside. Figure 1 )Exposed to the outside.

[0053] Figure 3 This is an exploded perspective view of the electronic device ED according to the present disclosure.

[0054] Reference Figure 3 The electronic device ED may include a display device DD and a housing HU. Although not shown, the electronic device ED may also include a mechanical structure for controlling the folding operation of the display device DD.

[0055] The display device DD in the embodiments of this disclosure may include displaying images (e.g., Figure 1The image (IM) is displayed by a display module DM, an upper module UM disposed on the display module DM, and a lower module LM disposed below the display module DM.

[0056] The upper module UM may include a window WM disposed on the display module DM. The window WM may include an optically transparent insulating material. Therefore, the image generated by the display module DM can be easily recognized by the user when viewed through the window WM.

[0057] The upper module UM may further include one or more functional layers disposed between the display module DM and the window WM. In embodiments of this disclosure, the functional layer may be an anti-reflective layer RPL that blocks the reflection of external light.

[0058] The anti-reflective layer RPL prevents the components constituting the display module DM from being visually identified by external light incident through the front surface of the display device DD. The anti-reflective layer RPL may include a phase retarder and / or 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 may also be a film-type or a liquid crystal coated type. The film-type may include a stretched synthetic resin film, and the liquid crystal coated type may include liquid crystal arranged in a predetermined form. The phase retarder and polarizer may form a polarizing film. The functional layer may also include a protective film disposed on or below the anti-reflective layer RPL.

[0059] A display module DM can form part of a display device DD, and specifically, images can be generated by the display module DM. The display module DM can display images based on electrical signals and send / receive information about external inputs. The display module DM can be defined as an active region AA and a peripheral region NAA. The active region AA can be defined as the area that transmits images provided from the display module DM.

[0060] The peripheral region NAA can be adjacent to (closely adjacent to) the active region AA. In an embodiment, for example, the peripheral region NAA can surround the active region AA. However, this is to illustrate that the peripheral region NAA can be defined in various shapes, and this disclosure is not limited to the embodiments. In an embodiment, the active region AA of the display module DM can be adjacent to... Figure 1 At least a portion of the display area DA overlaps.

[0061] The display module DM may include a display panel DP and an input sensing unit ISP. In the embodiments of this disclosure, the display panel DP may be a light-emitting display panel, but this disclosure is not limited thereto. In embodiments, for example, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, or a quantum dot light-emitting display panel. The light-emitting layer of an organic light-emitting display panel may include organic light-emitting materials, and the light-emitting layer of an inorganic light-emitting display panel may include inorganic light-emitting materials. The light-emitting layer of a quantum dot light-emitting display panel may include quantum dots or quantum rods, etc. Hereinafter, the display panel DP is described as an organic light-emitting display panel.

[0062] Display panel DP can generate images. Display panel DP can be a flexible display panel. Therefore, display panel DP can be fully rolled up or folded or unfolded about the folding axis FX.

[0063] The input sensing unit (ISP) can obtain coordinate information about user input (e.g., touch events). The ISP can be directly disposed on the display panel (DP). In embodiments according to this disclosure, the ISP can be formed on the display panel (DP) using a continuous process. That is, when the ISP is directly disposed on the display panel (DP), an adhesive film may not be required between the ISP and the DP. However, this disclosure is not limited thereto. An adhesive film may be provided between the ISP and the DP. In this case, the ISP is not manufactured together with the DP using a continuous process, but rather manufactured using a separate process from the DP, and then fixed to the upper surface of the DP using an adhesive film.

[0064] The lower module LM may include a support plate SP disposed on the rear surface of the display module DM to support the display module DM, and a protective film PF disposed between the display module DM and the support plate SP. The support plate SP may include a number of support plates corresponding to the non-folded regions NFA1 and NFA2. In embodiments of this disclosure, the support plate SP may include a first support plate SP1 and a second support plate SP2 spaced apart from the first support plate SP1.

[0065] The first support plate SP1 and the second support plate SP2 can be arranged to correspond to the first non-folding region NFA1 and the second non-folding region NFA2, respectively. The first support plate SP1 can be configured to overlap with the first non-folding region NFA1 of the electronic device ED (or display module DM), and the second support plate SP2 can be configured to overlap with the second non-folding region NFA2 of the electronic device ED (or display module DM). Each of the first support plate SP1 and the second support plate SP2 can comprise a metallic material or a plastic material.

[0066] When the electronic device ED is in such a state Figure 1 In the unfolded state shown, the first support plate SP1 and the second support plate SP2 can be spaced apart from each other in the second direction DR2. When the electronic device ED is in the unfolded state relative to the folding axis FX, as shown... Figure 2 In the folded state shown, the first support plate SP1 and the second support plate SP2 can be spaced apart from each other on the third direction DR3.

[0067] The first support plate SP1 and the second support plate SP2 can be spaced apart from each other to partially correspond to the folded area FA (see reference). Figure 1 The first support plate SP1 and the second support plate SP2 can partially overlap with the folding area FA. That is, the separation distance between the first support plate SP1 and the second support plate SP2 in the second direction DR2 can be less than that of the folding area FA (see reference). Figure 1 The width of ).

[0068] Although not shown, the support plate SP may also include a connecting module for connecting the first support plate SP1 and the second support plate SP2. The connecting module may include a hinge module or a multi-joint module.

[0069] The illustration shows a support plate SP comprising two support plates SP1 and SP2, but this disclosure is not limited thereto. That is, when multiple folding axes FX are provided, the support plate SP may comprise multiple support plates separated based on the multiple folding axes FX. Alternatively, the support plate SP may be provided in an integral shape without being separated into a first support plate SP1 and a second support plate SP2. In this case, a bent portion may be provided in the support plate SP to correspond to the folding area FA. An opening defined to pass through the support plate SP may be provided in the bent portion, or a groove recessed from one surface of the support plate SP may be provided in the bent portion.

[0070] A protective film PF can be disposed between the display module DM and the support plate SP. The protective film PF can also be disposed below the display module DM to protect the rear surface of the display module DM. The protective film PF may include a synthetic resin film, and may be, for example, a polyimide film or a polyethylene terephthalate film. However, this is merely one embodiment, and the protective film PF is not limited to the example described above.

[0071] The housing HU can be coupled to the display device DD, particularly the window WM, to house the display module DM and the lower module LM. The housing HU is shown to include a first housing HU1 and a second housing HU2 separated from each other, but this disclosure is not limited thereto. Although not shown, the electronic device ED may also include a hinge structure for connecting the first housing HU1 and the second housing HU2.

[0072] Figure 4 It is in accordance with this disclosure along Figure 3 The cross-sectional view of window WM taken by line I-I' is shown in the figure.

[0073] Reference Figure 4 The window WM may include a first non-folding portion NFP1, a second non-folding portion NFP2, and a folding portion FP. The folding portion FP may be disposed between the first non-folding portion NFP1 and the second non-folding portion NFP2. The first non-folding portion NFP1, the folding portion FP, and the second non-folding portion NFP2 may be arranged in a second direction DR2.

[0074] The first non-folding portion NFP1 can be with Figure 1 The first non-folded region NFA1 overlaps with the second non-folded region NFP2. Figure 1 The second non-folded region NFA2 overlaps. The folded portion FP can be with... Figure 1 The folded regions FA overlap.

[0075] The folding groove FGR can be defined on the upper surface of the folded portion FP. The folding groove FGR can be formed by removing a portion from the upper surface of the folded portion FP. In an embodiment, the folding groove FGR can have a shape corresponding to a portion of a trapezoid.

[0076] The thickness of the folded portion FP can be less than the thickness of the first non-folded portion NFP1 and the second non-folded portion NFP2. The height from the bottom surface of the window WM to the lower surface PLA of the folded portion FP can be less than the height from the bottom surface of the window WM to the upper surface of the first non-folded portion NFP1 and the height from the bottom surface of the window WM to the upper surface of the second non-folded portion NFP2.

[0077] Because the thickness of the folded portion FP is less than the thickness of the first non-folded portion NFP1 and the second non-folded portion NFP2, when the display device DD (refer to...) Figure 1 When folded, the folding portion FP of window WM can be easily folded. Since the thickness of the first non-folding portion NFP1 and the thickness of the second non-folding portion NFP2 are greater than the thickness of the folding portion FP, the first non-folding portion NFP1 and the second non-folding portion NFP2 can have greater rigidity than the folding portion FP.

[0078] The folded portion FP may include a lower surface PLA and a side surface IS defining the folding groove FGR. The lower surface PLA may have a plane defined by a first direction DR1 and a second direction DR2. The side surface IS extends from opposite sides of the lower surface PLA in a direction parallel to the second direction DR2 and may extend toward the upper surfaces of the first non-folded portion NFP1 and the second non-folded portion NFP2. When viewed from the first direction DR1, the side surface IS may correspond to a straight line. The angle defined between the side surface IS and the lower surface PLA may be an obtuse angle. Therefore, the boundaries between the folded portion FP and the first non-folded portion NFP1, and between the folded portion FP and the second non-folded portion NFP2, can be prevented from being visually recognized by the user.

[0079] Figure 5 This is a perspective view showing a window manufacturing apparatus (WMD) according to the present disclosure.

[0080] The window manufacturing apparatus (WMD) may include a stage ST, a slot TK, a control module CTL, a horizontal moving part HM, and a vertical moving part VM. The slot TK, the control module CTL, the horizontal moving part HM, and the vertical moving part VM can be arranged on the stage ST.

[0081] The TK tank can hold the LQD etchant (see reference). Figure 9B In embodiments, the etchant LQD may include or be composed of ammonium fluoride. The groove TK may be formed in a polyhedral shape. In this disclosure, the groove TK is shown to be a rectangular parallelepiped with a quadrilateral cross-section; for example, the groove TK may be a recessed groove defined by removing its upper surface, but the groove TK is not limited to the shapes described above, as long as the groove TK can accommodate the etchant LQD. A preliminary window PWM may be disposed in the recessed groove of the groove TK.

[0082] The control module CTL may include a first pad PD1 and a second pad PD2. The first pad PD1 and the second pad PD2 may be spaced apart from each other in a second direction DR2. The first pad PD1 and the second pad PD2 may include an elastic material. In an embodiment, for example, the first pad PD1 and the second pad PD2 may include silicon or be composed of silicon.

[0083] The control module CTL may further include a pad attachment portion PVC, to which a first pad PD1 and a second pad PD2 are coupled. The pad attachment portion PVC may comprise or be composed of a material that is not etched by the etchant LQD. In an embodiment, the pad attachment portion PVC may comprise polyvinyl chloride. For example, the first pad PD1 and the second pad PD2 may be coupled to the lower surface of the pad attachment portion PVC, and the vertically moving portion VM may be coupled to the upper surface of the pad attachment portion PVC. The pad attachment portion PVC may support the first pad PD1 and the second pad PD2. In the process of etching the initial window PWM, the pad attachment portion PVC, the first pad PD1, and the second pad PD2 can be etched simultaneously with immersion in the etchant LQD.

[0084] exist Figure 5 In this process, the surfaces on the lower surface of the PVC of the first pad PD1 and the second pad PD2 that are attached to the pad attachment portion can be curved surfaces. Figure 5 The cross-sectional shape of the surface of the pad attachment portion PVC is shown by removing a portion of the first pad PD1 and the second pad PD2. However, as long as the first pad PD1 and the second pad PD2 can be coupled to the pad attachment portion PVC, the surface of the first pad PD1 and the second pad PD2 attached to the pad attachment portion PVC can have a cylindrical shape or a semi-cylindrical shape with a curved surface.

[0085] The horizontal moving portion HM can move the control module CTL in a direction parallel to the first direction DR1 or in a second direction DR2 perpendicular to the first direction DR1. The horizontal moving portion HM can include a horizontal moving portion HM1 that moves the control module CTL in a direction parallel to the first direction DR1 and a horizontal moving portion HM2 that moves the control module CTL in a direction parallel to the second direction DR2. The horizontal moving portion HM can be coupled to the pad attachment portion PVC to move the first pad PD1 and the second pad PD2 in a direction parallel to the first direction DR1 or the second direction DR2. In an embodiment, for example, the control module CTL can be positioned on the preliminary window PWM to be etched via the horizontal moving portion HM.

[0086] The vertical moving portion VM can move the control module CTL in a direction parallel to the third direction DR3. In an implementation, for example, the vertical moving portion VM can move the control module CTL in a direction closer to or farther from the slot TK. The control module CTL can be positioned on the initial window PWM to be etched by the horizontal moving portion HM, and then the first pad PD1 and the second pad PD2 can be moved by the vertical moving portion VM to contact the initial window PWM.

[0087] The vertically moving portion VM can include a first mode that stops the movement of the control module CTL and a second mode that moves the control module CTL in a direction parallel to the third direction DR3. During the etching of the initial window PWM process, the first pad PD1 and the second pad PD2 of the control module CTL can be repeatedly moved and stopped on the third direction DR3.

[0088] In the first mode, with the control module CTL stopped, the initial window PWM can be etched while the first pad PD1 and the second pad PD2 are in contact with the initial window PWM. In the second mode, the control module CTL can move on the third direction DR3, and thus can change the portion (or area) of the first pad PD1 and the second pad PD2 in contact with the initial window PWM. After this, the first mode is repeated again, and thus the initial window PWM can be etched while the control module CTL is stopped. The first mode and the second mode can be repeated alternately.

[0089] Figure 6 This is a schematic perspective view showing a portion of the vertically moving part VM and the control module CTL of the window manufacturing apparatus WMD according to the present disclosure.

[0090] Reference Figure 6 The first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may face each other. The first pad PD1 and the second pad PD2 may have shapes symmetrical with respect to a third third direction DR3. The distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may be constant or decreasing along the third third direction DR3. In an embodiment, for example, at the location farthest from the pad attachment portion PVC, the distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may be the maximum distance between the first side surface SS1 and the second side surface SS2. Furthermore, at the location closest to the pad attachment portion PVC, the distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may be the minimum distance between the first side surface SS1 and the second side surface SS2.

[0091] In this embodiment, each of the first pad PD1 and the second pad PD2 may have a circular partial shape. In this case, the distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may be continuously decreasing in the third direction DR3. That is, there may not be an interval in which the distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 is constant in the third direction DR3.

[0092] The initial window PWM can be in the window WM (refer to) Figure 4The component (or part) before being processed. The window WM can be formed by etching a preliminary window PWM. The preliminary window PWM may include a first region EA and a second region NEA adjacent (immediately adjacent) to the first region EA, with the first region EA situated between the second regions NEA. That is, the second region NEA, the first region EA, and the second region NEA of the preliminary window PWM can be arranged in one direction (e.g., a second direction DR2). The first region EA may correspond to the area where the preliminary window PWM is etched, and the second region NEA may correspond to the area where the preliminary window PWM is not etched. The first region EA of the preliminary window PWM may be adjacent to the window WM (refer to...). Figure 4 The folded portion FP (refer to) Figure 4 Corresponding to, and the second region NEA of the initial window PWM can correspond to the first non-folded portion NFP1 of the window WM (refer to) Figure 4 ) and the second non-folded part NFP2 (refer to Figure 4 )correspond.

[0093] The upper film DFR can be set on the preliminary window PWM. The opening OP can be defined in the upper film DFR (or possessed by the upper film DFR). The opening OP of the upper film DFR can overlap with the first region EA of the preliminary window PWM. That is, the opening OP of the upper film DFR can be a process-defined opening for etching the preliminary window PWM. The upper film DFR can prevent etchant LQD (refer to...) Figure 9B The material flows into the second region NEA. The second region NEA, which overlaps with the upper film DFR of the initial window PWM, may not be etched. The upper film DFR may include a polymer material. In an embodiment, for example, the upper film DFR may include polyimide or epoxy resin. In an embodiment, the upper film DFR may include an acid-resistant film.

[0094] The lower film FLM can be positioned below the initial window PWM. The lower film FLM can be made of the same material as the upper film DFR. The lower film FLM prevents the etchant LQD from contacting the bottom surface of the initial window PWM.

[0095] Figure 7 This is a cross-sectional view of the control module CTLa according to this disclosure.

[0096] Reference Figure 7A portion of the first pad PD1a and the second pad PD2a may have a circular shape, and the remaining (other) portions of the first pad PD1a and the second pad PD2a may have a linear shape. In an embodiment, for example, each of the first side surface SS1 of the first pad PD1a and the second side surface SS2 of the second pad PD2a may include a first pad portion PP1 and a second pad portion PP2, wherein in the first pad portion PP1, the distance between the first side surface SS1 and the second side surface SS2 decreases along a third direction DR3, and in the second pad portion PP2, the distance between the first side surface SS1 and the second side surface SS2 is constant along a third direction DR3. In the first pad portion PP1, the first side surface SS1 of the first pad PD1a and the second side surface SS2 of the second pad PD2a may be a portion of a circle, and in the second pad portion PP2, the first side surface SS1 of the first pad PD1a and the second side surface SS2 of the second pad PD2a may be a straight line.

[0097] Figure 8 This is a flowchart illustrating a window manufacturing method according to the present disclosure. Figures 9A to 9E This is a cross-sectional view showing some operations of the window manufacturing method according to this disclosure.

[0098] Reference Figure 8 and Figure 9A The window manufacturing method may include an operation S100 of preparing a groove TK. The groove TK may have a recessed groove. The groove TK may be formed in a polyhedral shape. In this disclosure, a rectangular parallelepiped with a quadrilateral cross-section is shown as the groove TK. For example, the groove TK may have a recessed groove defined by removing its upper surface, but the groove TK is not limited to the above shape, as long as the groove TK can accommodate the etchant LQD (see reference). Figure 9B ).

[0099] The window manufacturing method may include an operation S200 of arranging a preliminary window PWM in a groove of a slot TK. Specifically, a lower film FLM may be disposed inside the slot TK, and the preliminary window PWM may be disposed on the lower film FLM. The preliminary window PWM may include a first region EA and a plurality of second regions NEA adjacent to (closely adjacent to) the first region EA, with the first region EA situated between the plurality of second regions NEA. The first region EA may correspond to the area of ​​the preliminary window PWM that is etched, and the second regions NEA may correspond to the area of ​​the preliminary window PWM that is not etched.

[0100] The window manufacturing method may include an operation S300 of placing an upper film DFR with an opening OP on a preliminary window PWM. The opening OP of the upper film DFR may overlap with a first region EA of the preliminary window PWM. That is, the upper film DFR may cover a second region NEA of the preliminary window PWM. The upper film DFR can prevent etchant LQD (refer to...) Figure 9BThe material flows into the second region NEA. As a result, the second region NEA, which overlaps with the upper film DFR, of the initial window PWM can be etched without etching, and only the first region EA, which overlaps with the opening OP, of the initial window PWM can be etched.

[0101] The window manufacturing method may include operation S400 of preparing a control module CTL. The control module CTL may include a first pad PD1, a second pad PD2 spaced apart from the first pad PD1, and a pad attachment portion PVC coupled to the first pad PD1 and the second pad PD2.

[0102] The first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may face each other. The first pad PD1 and the second pad PD2 may have shapes that are symmetrical with respect to a third direction DR3. The distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 may be constant or decreasing in the third direction DR3.

[0103] Figure 9A A first pad PD1 and a second pad PD2 are shown, wherein the distance between the first side surface SS1 of the first pad PD1 and the second side surface SS2 of the second pad PD2 decreases continuously in the third direction DR3, but this disclosure is not limited to the above example. In another embodiment, the first pad PD1a (refer to...) Figure 7 ) and the second pad PD2a (refer to) Figure 7 The portion of the first pad PD1a and the remaining (other) portions of the second pad PD2a can have a circular shape, and the remaining (other) portions of the first pad PD1a and the second pad PD2a can have a linear shape.

[0104] Reference Figure 8 , Figure 9A and Figure 9B The window manufacturing method may include an operation S500 in which the movement control module CTL is positioned inside the opening OP of the upper film DFR. The control module CTL can move in the direction opposite to the third direction DR3. In an embodiment, for example, the control module CTL can move in a direction close to the preliminary window PWM. The operation S500 in which the movement control module CTL is positioned inside the opening OP of the upper film DFR may include an operation in which the first pad PD1 and the second pad PD2 contact the preliminary window PWM. The first pad PD1 and the second pad PD2 can contact the preliminary window PWM within a first region EA.

[0105] When the first pad PD1 and the second pad PD2 move in the opposite direction to the third direction DR3 after the first pad PD1 and the second pad PD2 contact the initial window PWM, the first pad PD1 and the second pad PD2 can be compressed. The compressed first pad PD1 and the compressed second pad PD2 can be arranged inside the opening OP of the upper membrane DFR.

[0106] Due to the restoring elastic force during the compression process, a repulsive force can be formed on the third-direction DR3 in the first pad PD1 and the second pad PD2, which are made of elastic material or composed of elastic material. However, the pad attachment portion PVC can be coupled to the first pad PD1 and the second pad PD2 to support the first pad PD1 and the second pad PD2, and therefore the first pad PD1 and the second pad PD2 can be arranged without movement inside the opening OP of the upper membrane DFR. Furthermore, the operation S500 of the movement control module CTL causing the control module CTL to be positioned inside the opening OP of the upper membrane DFR may include the operation of the movement control module CTL causing the first pad PD1 and the second pad PD2 to cover the end of the defining opening OP of the upper membrane DFR. The first pad PD1 and the second pad PD2 can cover the end of the defining opening OP of the upper membrane DFR, and the first pad PD1 and the second pad PD2 can contact the end of the upper membrane DFR and a portion of the initial window PWM.

[0107] When the first pad PD1 and the second pad PD2 cover the end of the upper film DFR, the etchant LQD contacts the end of the upper film DFR, and thus can reduce or eliminate the phenomenon that the upper film DFR and the initial window PWM are spaced apart from each other.

[0108] The first pad PD1 and the second pad PD2 can cover the end of the defined opening OP of the upper membrane DFR. Therefore, even when a lift phenomenon occurs at the end of the upper membrane DFR, as the coupling force between the upper membrane DFR and the preliminary window PWM weakens, the first pad PD1 and the second pad PD2 can cover the upper membrane DFR to transmit pressure to the end of the upper membrane DFR and the preliminary window PWM. With this pressure, the lift phenomenon occurring at the end of the upper membrane DFR can be reduced or eliminated.

[0109] A window manufacturing method may include an operation S600 of providing an etchant LQD to a groove in a tank TK. In an embodiment, the etchant LQD may include ammonium fluoride or be composed of ammonium fluoride. The operation S600 of providing the etchant LQD to the groove in the tank TK may include contacting a first pad PD1, a second pad PD2, and a pad attachment portion PVC with the etchant LQD. The first pad PD1, the second pad PD2, and the pad attachment portion PVC may include or be composed of a material that is not etched (or damaged) by the etchant LQD. In an embodiment, for example, the first pad PD1 and the second pad PD2 may include silicon, and the pad attachment portion PVC may include polyvinyl chloride.

[0110] The window manufacturing method may include an operation S700 of etching a preliminary window PWM and an operation S800 of moving a control module CTL in a direction away from the preliminary window PWM. After moving the control module CTL in a direction away from the preliminary window PWM, an operation S900 is performed to space the first pad PD1 and the second pad PD2 from the window WM. When the first pad PD1 and the second pad PD2 are not spaced from the window WM, the operation S700 of etching the preliminary window PWM and the operation S800 of moving the control module CTL in a direction away from the preliminary window PWM can be repeated n times (n is a natural number of 2 or greater). That is, in an embodiment, the window manufacturing method may include an operation S700 of first etching the preliminary window PWM and an operation S700 of second etching the preliminary window PWM, and may also include an operation S700 of third etching the preliminary window PWM. Figure 9B Describes the operation of the initial window PWM during the first etching, and will be passed through Figure 9C Describe the operation of the initial window PWM in the secondary etching.

[0111] First, refer to Figure 8 and Figure 9B The window manufacturing method may include an operation S700 of first etching the portion of the initial window PWM that does not contact the first pad PD1 and the second pad PD2. The first etched region EA may include a portion (region) in which the first pad PD1 and the second pad PD2 contact the initial window PWM and a portion (region) in which the first pad PD1 and the second pad PD2 do not contact the initial window PWM. The region in which the first pad PD1 and the second pad PD2 contact the initial window PWM may not be etched because the etchant LQD does not directly contact the initial window PWM in this region. The other region in which the first pad PD1 and the second pad PD2 do not contact the initial window PWM may be etched because the etchant LQD directly contacts the initial window PWM in this other region.

[0112] In the initial etching operation S700 of the preliminary window PWM, a side surface IS1 and a first lower surface PLA1 of the preliminary window PWM can be formed. In an embodiment, for example, the initial etching operation S700 of the preliminary window PWM may include forming a first-1 inner surface IS11 adjacent to (closely adjacent to) the first pad PD1, a second-1 inner surface IS21 adjacent to (closely adjacent to) the second pad PD2, and a first lower surface PLA1 extending to the first-1 inner surface IS11 and the second-1 inner surface IS21. The surface formed by the side surface IS1 and the first lower surface PLA1 formed in the preliminary window PWM and the virtual extension line of the upper surface PWMU of the preliminary window PWM can form an inverted trapezoidal shape.

[0113] Reference Figure 8 and Figure 9CThe window manufacturing method may include an operation S800 of moving the control module CTL in a direction away from the initial window PWM. In an embodiment, for example, in the operation S800 of moving the control module CTL in a direction away from the initial window PWM (e.g., third direction DR3), the control module CTL may be moved such that a first portion P1 of the first pad PD1 and the second pad PD2 is exposed from the opening OP of the upper film DFR. The operation S800 of moving the control module CTL in a direction away from the initial window PWM may include moving the control module CTL away from the etchant LQD.

[0114] When a third party moves the control module CTL to DR3, such as Figure 9C The area (area) where the first pad PD1 and the second pad PD2 contact the initial window PWM shown can be smaller than that shown. Figure 9B The diagram shows the area (area) where the first pad PD1 and the second pad PD2 contact the initial window PWM. That is, the control module CTL can move on the third direction DR3, and thus can expand the area (area) of the initial window PWM that does not contact the first pad PD1 and the second pad PD2.

[0115] Subsequently, the window manufacturing method may include a second etching operation S700 on the portion of the initial window PWM that does not contact the first pad PD1 and the second pad PD2. The area where the first pad PD1 and the second pad PD2 contact the initial window PWM may not be etched because the etchant LQD does not directly contact the initial window PWM in that area, and another area where the first pad PD1 and the second pad PD2 do not contact the initial window PWM may be etched a second time because the etchant LQD directly contacts the initial window PWM in that other area.

[0116] In the second etching operation S700 of the preliminary window PWM, a side surface IS2 and a second lower surface PLA2 of the preliminary window PWM can be formed. In an embodiment, for example, the second etching operation S700 of the preliminary window PWM may include forming a first-second inner surface IS12 adjacent to (immediately adjacent to) the first pad PD1, a second-second inner surface IS22 adjacent to (immediately adjacent to) the second pad PD2, and a second lower surface PLA2 extending to the first-second inner surface IS12 and the second-second inner surface IS22. The surface formed by the side surface IS2 and the second lower surface PLA2 formed in the preliminary window PWM and the virtual extension line of the upper surface PWMU of the preliminary window PWM can form an inverted trapezoidal shape.

[0117] Figure 9C The area (region) where the first pad PD1 and the second pad PD2 do not contact the initial window PWM can be greater than [the area of ​​the area of ​​the area of ​​the area of ​​the initial window PWM]. Figure 9BThe area (area) of the first pad PD1 and the second pad PD2 that does not contact the initial window PWM. That is, in the second etching operation S700 of the initial window PWM, the area (area) of the initial window PWM that contacts the etchant LQD can be increased.

[0118] As the inner surface IS11 of the first-1 (refer to) Figure 9B ) and the second-1 inner surface IS21 (refer to Figure 9B The first width W1 of the maximum distance between ) (refer to) Figure 9B The second width W2 can be smaller than the maximum distance between the first-second inner surface IS12 and the second-second inner surface IS22. In the operation S700 of the second etching of the initial window PWM, the etching is further performed because the area (area) of the initial window PWM in contact with the etchant LQD increases, and therefore the second width W2 can be greater than the first width W1.

[0119] The first depth L1 (refer to) is the distance from the upper surface PWMU of the initial window PWM to the first lower surface PLA1. Figure 9B The second depth L2 can be less than the distance from the upper surface PWMU of the initial window PWM to the second lower surface PLA2. Since the first lower surface PLA1, which is etched for the first time, contacts the etchant LQD and is etched for the second time, the initial window PWM can be further etched, and therefore, the second depth L2 can be greater than the first depth L1.

[0120] In the cross-section, the area of ​​the trapezoid defined by the virtual extension lines of the side surface IS2, the second lower surface PLA2, and the upper surface PWMU of the initial window PWM etched in the second etching can be larger than that defined by the side surface IS1 of the initial window PWM etched in the first etching (see reference). Figure 9B ), first lower surface PLA1 (refer to) Figure 9B The area of ​​the trapezoid defined by the virtual extension line of the upper surface PWMU.

[0121] Reference Figure 8 and Figure 9D After the second etching operation S700 of the initial window PWM, the window manufacturing method may further include the operation S800 of moving the control module CTL in a direction away from the initial window PWM, so that the second part P2 of the first pad PD1 and the second pad PD2 is exposed from the opening OP of the upper film DFR.

[0122] After the second etching, the volume of the second portion P2 of the first pad PD1 and the second pad PD2, formed by moving the control module CTL, which includes the first pad PD1, the second pad PD2, and the pad attachment portion PVC, onto DR3 by a third party, can be larger than the volume of the first portion P1 of the first pad PD1 and the second pad PD2 (refer to...). Figure 9C The volume of the control module CTL can be moved on the third-party DR3 so that the first pad PD1 and the second pad PD2 cover a portion of the upper surface of the upper membrane DFR. When the control module CTL is moved on the third-party DR3, the first pad PD1 and the second pad PD2 may not contact the initial window PWM.

[0123] Following this, the window manufacturing method may further include a third etching operation S700 on the portion of the initial window PWM that does not contact the first pad PD1 and the second pad PD2. Because the first pad PD1 and the second pad PD2 do not contact the initial window PWM, the etchant LQD can contact the front surface of the initial window PWM, and thus etching can be performed.

[0124] In the operation S700 of performing a third etching on the preliminary window PWM, a side surface IS3 and a third lower surface PLA3 of the preliminary window PWM can be formed. In an embodiment, for example, the operation S700 of performing a third etching on the preliminary window PWM may include forming a first-third inner surface IS13 adjacent to the first pad PD1, a second-third inner surface IS23 adjacent to the second pad PD2, and a third lower surface PLA3 extending to the first-third inner surface IS13 and the second-third inner surface IS23. The surface formed by the side surface IS3 and the third lower surface PLA3 formed in the preliminary window PWM and the virtual extension line of the upper surface PWMU of the preliminary window PWM can form an inverted trapezoidal shape.

[0125] Figure 9D The area (region) where the first pad PD1 and the second pad PD2 do not contact the initial window PWM can be greater than [the area of ​​the ... initial window PWM]. Figure 9C The area (area) of the first pad PD1 and the second pad PD2 that does not contact the initial window PWM. That is, in the third etching operation S700 of the initial window PWM, the area (area) of the initial window PWM that contacts the etchant LQD can be increased.

[0126] As the first-second inner surface IS12 (refer to) Figure 9C ) and the second-2nd inner surface IS22 (refer to Figure 9C The second width W2 of the maximum distance between (refer to) Figure 9C The third width W3 can be smaller than the maximum distance between the first-third inner surface IS13 and the second-third inner surface IS23. In the operation S700 of the third etching of the preliminary window PWM, since the area (area) of the preliminary window PWM in contact with the etchant LQD increases, and therefore further etching can be performed, the third width W3 can be greater than the second width W2.

[0127] The second depth L2 (refer to) is the distance from the upper surface PWMU of the initial window PWM to the second lower surface PLA2. Figure 9C The third depth L3 can be less than the distance from the upper surface PWMU of the initial window PWM to the third lower surface PLA3. Since the second lower surface PLA2, which is etched in the second etch, contacts the etchant LQD and is etched in the third etch, the initial window PWM can be further etched, and therefore, the third depth L3 can be greater than the second depth L2.

[0128] In the cross-section, the area of ​​the trapezoid defined by the virtual extension lines of the side surface IS3, the third lower surface PLA3, and the upper surface PWMU of the preliminary window PWM etched in the third etching can be larger than that of the side surface IS2 of the preliminary window PWM etched in the second etching (see reference). Figure 9C ), second lower surface PLA2 (refer to) Figure 9C The area of ​​the trapezoid defined by the virtual extension line of the upper surface PWMU.

[0129] Reference Figure 8 and Figure 9E The window manufacturing method may include an operation S900 that spaces the first pad PD1 and the second pad PD2 apart from the window WM. When the first pad PD1 and the second pad PD2 move on the third direction DR3 and are spaced apart from the window WM, the etchant LQD can be discharged from inside the tank TK.

[0130] Window manufacturing methods may include starting from the initial window PWM (refer to...) Figure 9D The operation S1000 for forming the window WM. In embodiments of this disclosure, a first etching, a second etching, and a third etching for forming the window WM are shown / described, but the number of etchings is not limited thereto. In embodiments, the initial window PWM may be etched four or more times to form a window WM comprising a side surface IS having a slope and a flat lower surface PLA. In embodiments, for example, the side surface IS may extend to the flat lower surface PLA and the flat upper surface WMU of the window WM.

[0131] The operation S1000 of forming window WM from the initial window PWM may include the operation of forming a side surface IS with a slope that is the lower surface PLA of window WM. Through Figures 9A to 9D The etching process creates a side surface IS of the window WM that can have a slope. The portion parallel to the lower surface PLA of the window WM may not be on the side surface IS. The side surface IS of the window WM can be a flat plane without bending in the plan view.

[0132] Furthermore, the operation S1000 of forming window WM from the initial window PWM may include the operation of forming the lower surface PLA of the window WM, which constitutes a flat plane. The lower surface PLA of the window WM can be formed simultaneously with the etching of a portion of the first region EA overlapping the opening OP of the upper film DFR by the etchant LQD. Figures 9A to 9D The etching process can create a flat plane on the lower surface of the window WM.

[0133] The operation S1000 of forming window WM from the initial window PWM may include forming a side surface IS and a lower surface PLA of window WM such that the angle defined between the side surface IS and the lower surface PLA of window WM is an obtuse angle. The lower surface PLA of window WM and the side surface IS of window WM may be defined as an obtuse angle. In an embodiment, for example, the angle defined between the lower surface PLA of window WM and the side surface adjacent (closely adjacent) to the first pad PD1 may be an obtuse angle, and the angle defined by the lower surface PLA of window WM and the side surface adjacent (closely adjacent) to the second pad PD2 may be an obtuse angle.

[0134] The first pad PD1 and the second pad PD2 of this disclosure can have a circular shape. Furthermore, in the window manufacturing method of this disclosure, by repeatedly performing the operation S700 of etching the initial window PWM and the operation S800 of moving the control module CTL in a direction away from the initial window PWM, the area (area) in which the first pad PD1 and the second pad PD2 do not contact the initial window PWM can be continuously changed. That is, because the first pad PD1 and the second pad PD2 do not contact the initial window PWM, the etched area (area) of the initial window PWM can be continuously changed. Therefore, each of the plurality of side surfaces IS of the window WM formed by the above process can have a single slope. Furthermore, the window WM can be etched inside the etchant LQD to have a flat lower surface PLA. The side surfaces IS and the lower surface PLA of the window WM can have flat surfaces without bending. In cross-section, the side surfaces IS of the window WM can have a gently straight line relative to the lower surface PLA. Therefore, in an electronic device ED including the window WM (refer to...), Figure 1 In this system, a constant amount of light can be maintained during light transmission, and the user's visibility can be improved.

[0135] Based on the above description, the first and second pads of this disclosure can provide pressure to the end of the upper membrane and the preliminary window while covering the end of the defined opening of the upper membrane. This pressure can reduce or eliminate lifting phenomena occurring at the end of the upper membrane.

[0136] The first and second pads of this disclosure can have a circular shape. Furthermore, in the window manufacturing method of this disclosure, by repeatedly etching the preliminary window and moving the control module in a direction away from the preliminary window, the areas (areas) where the first and second pads do not contact the preliminary window can be continuously varied. Therefore, the side surface of the window can have a gently sloping straight line relative to the lower surface in cross-section. Thus, in electronic devices including windows, a constant transmission rate can be maintained during light transmission, and user visibility can be improved.

[0137] Although embodiments of this disclosure have been described above with reference to them, it is understood that various modifications and changes can be made to this disclosure by those skilled in the art or those with ordinary knowledge in the art without departing from the spirit and scope of this disclosure as described in the appended claims. Therefore, the technical scope of this disclosure is not limited to the detailed description in the specification, but should be defined by the appended claims.

Claims

1. A method of window manufacturing, wherein, The method includes: preparing a trench defined with a recessed groove; arranging a preliminary window in the recessed groove of the trench, the preliminary window including a first area and a plurality of second areas adjacent to the first area, and the first area being interposed between the plurality of second areas; arranging an upper film on the preliminary window, the upper film being defined with an opening overlapping the first area of the preliminary window; preparing a control module including a first pad, a second pad spaced apart from the first pad, and a pad attachment portion to which the first pad and the second pad are coupled; moving the control module so that the first pad and the second pad are arranged inside the opening of the upper film; providing an etchant to the recessed groove of the trench; first etching a portion of the preliminary window not in contact with the first pad and the second pad; moving the control module in a direction away from the preliminary window so that a first portion of the first pad and a first portion of the second pad are exposed from the opening of the upper film; second etching a portion of the preliminary window not in contact with the first pad and the second pad; and forming a window from the preliminary window.

2. The window manufacturing method of claim 1, wherein, The providing of the etchant to the recessed groove of the trench includes: contacting the first pad, the second pad, and the pad attachment portion to the etchant.

3. The window manufacturing method of claim 1, wherein, The moving of the control module so that the first pad and the second pad are arranged inside the opening of the upper film includes: contacting the first pad and the second pad to the preliminary window.

4. The window manufacturing method of claim 1, wherein, The moving of the control module so that the first pad and the second pad are arranged inside the opening of the upper film includes: moving the control module so that the first pad and the second pad cover an end of the upper film defining the opening.

5. The window manufacturing method of claim 1, wherein, First and second side surfaces of the first and second pads face each other, and a distance between the first and second side surfaces is constant or decreases in a thickness direction of the preliminary window.

6. The window manufacturing method of claim 1, wherein, The first etching of the portion of the preliminary window not in contact with the first pad and the second pad includes: forming a first inner side surface adjacent to the first pad, a second inner side surface adjacent to the second pad, and a first lower surface extending to the first and second inner side surfaces.

7. The window manufacturing method of claim 6, wherein, The second etching of the portion of the preliminary window not in contact with the first pad and the second pad includes: forming a first inner side surface adjacent to the first pad, a second inner side surface adjacent to the second pad, and a first lower surface extending to the first and second inner side surfaces.

8. The window manufacturing method of claim 7, wherein, A first width, which is a maximum distance between the first and second inner side surfaces, is smaller than a second width, which is a maximum distance between the first and second inner side surfaces.

9. The window manufacturing method of claim 7, wherein, A first depth, which is a distance from an upper surface of the preliminary window to the first lower surface, is smaller than a second depth, which is a distance from the upper surface of the preliminary window to the second lower surface.

10. The window manufacturing method of claim 1, wherein, The moving the control module in the direction away from the preliminary window includes: The moving the control module in a direction away from the etchant.

11. The window manufacturing method of claim 1, wherein, The moving the control module in the direction away from the preliminary window includes: The first mode of stopping the movement of the control module and the second mode of moving the control module in the direction away from the preliminary window are alternately repeated.

12. The window manufacturing method of claim 1, wherein, After the secondary etching of the preliminary window, the method further includes: The moving the control module in the direction away from the preliminary window exposes a second portion of the first pad and a second portion of the second pad from the opening of the upper film; and The third etching of a portion of the preliminary window not in contact with the first pad and the second pad, wherein a volume of the second portion of the first pad and the second portion of the second pad is greater than a volume of the first portion of the first pad and the first portion of the second pad.

13. The window manufacturing method of claim 1, wherein, The forming the window from the preliminary window includes: forming a side surface of the window forming a slope with a lower surface of the window.

14. The window manufacturing method of claim 1, wherein, The forming the window from the preliminary window includes: forming a lower surface of the window forming a flat plane.

15. The window manufacturing method of claim 1, wherein, The forming the window from the preliminary window includes: forming a side surface and a lower surface of the window such that an angle defined between the side surface of the window and the lower surface of the window is obtuse.

16. A window manufacturing apparatus, wherein, The window manufacturing apparatus includes: a tank in which an etchant is contained and in which a preliminary window is disposed; a control module including a first pad and a second pad spaced apart from the first pad; a horizontal moving portion configured to move the control module in a direction parallel to a first direction or a second direction perpendicular to the first direction; and a vertical moving portion configured to move the control module in a direction parallel to a third direction perpendicular to the first direction and the second direction, wherein a first side surface of the first pad and a second side surface of the second pad face each other, and a distance between the first side surface and the second side surface is constant or decreasing in the third direction.

17. The window manufacturing apparatus of claim 16, wherein, The vertical moving portion includes a first mode of stopping the movement of the control module and a second mode of moving the control module in the third direction, and wherein the first mode and the second mode are alternately repeated.

18. The window manufacturing apparatus of claim 16, wherein, Each of the first pad and the second pad includes an elastic material.

19. The window manufacturing apparatus of claim 16, wherein, The distance between the first side surface and the second side surface is continuously decreasing in the third direction.

20. The window manufacturing apparatus of claim 16, wherein, Each of the first side surface and the second side surface includes a first pad portion in which the distance between the first side surface and the second side surface is decreasing in the third direction and a second pad portion in which the distance between the first side surface and the second side surface is constant in the third direction.

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