mask

Abstract

Disclosed is a mask. The mask includes a mask frame, a first opening portion defined in the mask frame, a first mask disposed on the mask frame, a second opening portion defined in the first mask so as to overlap the first opening portion, a second mask including a mesh portion having a mesh shape so as to overlap the second opening portion and disposed on the first mask, and a fixing portion disposed on the second mask and extending along an edge of the second mask so as to surround the mesh portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a mask. BACKGROUND

[0002] Generally, an electronic device (such as a smart phone, a digital camera, a notebook computer, a navigation system, and a smart TV) that provides an image to a user includes a display device for displaying an image. The display device generates an image and provides the generated image to the user through a display screen.

[0003] The display device includes a display panel that generates an image and a functional element that provides various functions to the user. The display panel is divided into a display area and a non-display area surrounding the display area. The display panel includes pixels disposed in the display area to generate an image. The functional element includes a camera and a sensor disposed in the non-display area.

[0004] Recently, in order to expand the display area to the non-display area, there is a need for technical development for arranging a camera in the display area. When the camera is disposed in the display area, pixels should not be disposed in an area in which the camera is disposed. For this, there is a need to develop a mask for not forming pixels in the area in which the camera is disposed. SUMMARY

[0005] TECHNICAL PROBLEM

[0006] The present application provides a mask for more firmly fixing a mesh mask on which a blocking portion overlapping a camera arrangement area is disposed to a mask frame.

[0007] TECHNICAL SOLUTION

[0008] The mask according to an embodiment of the present application includes a mask frame in which a first opening portion is defined, a first mask disposed on the mask frame, a second opening portion overlapping the first opening portion defined in the first mask, a second mask including a mesh portion having a mesh shape overlapping the second opening portion and disposed on the first mask, and a fixing portion disposed on the second mask and extending along an edge of the second mask to surround the mesh portion.

[0009] The fixing portion includes a plurality of fixing bars disposed along the edge of the second mask.

[0010] The fixing bars include a plurality of first fixing bars extending in a first direction and spaced apart from each other in a second direction intersecting the first direction, and a plurality of second fixing bars extending in the second direction and spaced apart from each other in the first direction.

[0011] The fixing portion has a thickness of 600 micrometers to 2000 micrometers.

[0012] The grid portion includes a plurality of grid lines defining a grid shape, wherein each of the plurality of grid lines has a line width of 10 to 20 micrometers.

[0013] A gap between two grid lines extending in parallel to each other and facing each other is 0.5 to 2 millimeters.

[0014] The mask further includes a blocking portion disposed on a portion of the grid portion.

[0015] The blocking portion has a circular shape, and a diameter of the blocking portion is greater than the gap between the two grid lines.

[0016] The blocking portion is connected to the grid lines.

[0017] Advantageous Effects

[0018] According to embodiments of the present application, since an edge of the grid mask on which the blocking portion is disposed is fixed by the fixing portion, the grid mask can be more firmly fixed to the opening mask and the mask frame. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is an exploded perspective view of a mask according to embodiments of the present application.

[0020] Figure 2 is a perspective view of a mask in which components of the mask shown in Figure 1 are combined.

[0021] Figure 3 is a plan view of the mask shown in Figure 2 when viewed from above.

[0022] Figure 4 is a cross-sectional view taken along line I-I' of the mask shown in Figure 3 .

[0023] Figure 5 is a cross-sectional view taken along line II-II' of the mask shown in Figure 3 .

[0024] Figure 6 is an enlarged view showing a portion of the mask shown in Figure 5 in which the blocking portion is superimposed and a portion adjacent to the blocking portion.

[0025] Figure 7 is a plan view of a display panel manufactured using the mask shown in Figure 1 .

[0026] Figure 8 is a diagram exemplarily showing a cross-sectional configuration of a pixel disposed in a display area shown in Figure 7 .

[0027] Figure 9 is a cross-sectional view taken along Figure 7 line III-III' shown in FIG. 3.

[0028] Figure 10 is a view schematically showing a display device manufactured using Figure 7 the display panel shown in FIG. 3.

[0029] Figure 11 to Figure 15 is a view showing a configuration of a fixing portion according to various embodiments of the present application.

[0030] Figure 16 is a perspective view of a mask according to another embodiment of the present application.

[0031] Figure 17 is a plan view of the mask shown in FIG. 5 when viewed from above. Figure 16

[0032] Figure 18 is a cross-sectional view taken along Figure 17 line IV-IV' shown in FIG. 6.

[0033] Figure 19 is a view showing a configuration of a fixing portion according to another embodiment of the present application.

[0034] Figure 20 is a view showing a deposition material sprayed toward Figure 19 the fixing portion shown in FIG. 7. DETAILED DESCRIPTION

[0035] In this specification, when an element (or area, layer, portion, and the like) is referred to as being "on" another element, "connected to" or "bonded to" another element, it means that the element can be directly placed on / connected to / bonded to the other element or a third component can be arranged therebetween.

[0036] The same reference numerals refer to the same elements throughout the specification. Also, in the drawings, the thickness, proportions, and sizes of components are exaggerated for effective description.

[0037] The "and / or" includes all of one or more combinations defined by the relevant components.

[0038] It will be understood that the terms "first" and "second" are used herein to describe various components, but the components should not be limited by these terms. The above terms are used only to distinguish one component from another component. For example, a first component can be referred to as a second component, and vice versa, without departing from the scope of the present application. Unless otherwise specified, the singular form of a term can include the plural form. ​

[0039] In addition, terms such as "below", "under", "on", and "above" are used to describe the relationship of the configuration shown in the drawings. These terms are described as a relative concept based on the direction shown in the drawings.

[0040] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, terms defined in a general dictionary should be interpreted as having a meaning consistent with the meaning in the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense, unless the terms are explicitly so defined herein.

[0041] In various embodiments of the present application, the terms "include", "comprise" or variations thereof indicate the presence of the described nature, region, fixed number, step, process, element and / or component, but do not exclude the presence or addition of other nature, region, fixed number, step, process, element and / or component.

[0042] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0043] Figure 1 is an exploded perspective view of a mask according to an embodiment of the present application.

[0044] Referring to Figure 1 According to an embodiment of the present application, the mask MSK can include a mask frame MF, a first mask MK1, a second mask MK2, a plurality of blocking portions BLP, and a fixed portion FP.

[0045] The mask frame MF can have a side surface extending in a first direction DR1 and a side surface extending in a second direction DR2 crossing the first direction DR1. The side surface of the mask frame MF can define an edge of the mask frame MF. The mask frame MF can include a metal.

[0046] The mask frame MF can have a frame shape. According to the frame shape, a first opening portion OP1 having a rectangular shape can be defined in the mask frame MF. The first opening portion OP1 can have a rectangular shape extending longer in the first direction DR1 than in the second direction DR2.

[0047] Hereinafter, a direction crossing a plane defined by the first direction DR1 and the second direction DR2 is defined as a third direction DR3. The third direction DR3 can substantially perpendicularly intersect the plane defined by the first direction DR1 and the second direction DR2. In the present specification, it can refer to a state of viewing in the third direction DR3 when viewed on the plane.

[0048] The first mask MK1 can be disposed on the mask frame MF. The first mask MK1 can have a rectangular shape having a long side extending in the first direction DR1 and a short side extending in the second direction DR2. However, the shape of the first mask MK1 is not limited thereto. The long side and the short side of the first mask MK1 are side surfaces of the first mask MK1 and can be connected to each other to define an edge of the first mask MK1. The first mask MK1 can include a metal.

[0049] A plurality of second opening portions OP2 can be defined in the first mask MK1. The second opening portions OP2 can overlap the first opening portions OP1 when viewed on a plane. The first mask MK1 in which the second opening portions OP2 are defined can be defined as an opening mask. Each of the second opening portions OP2 can correspond to a display panel which will be described later.

[0050] The second opening portions OP2 can be arranged in the first direction DR1 and the second direction DR2. When the first direction DR1 corresponds to a row direction and the second direction DR2 corresponds to a column direction, the second opening portions OP2 can be arranged in two rows and three columns.

[0051] For example, six second opening portions OP2 arranged in two rows and three columns are shown, but the number of the second opening portions OP2 is not limited thereto. For example, at least one second opening portion OP2 can be defined in the first mask MK1.

[0052] The second opening portions OP2 can have a rectangular shape which is longer in the second direction DR2 than in the first direction DR1. However, the present application is not limited thereto, and the second opening portions OP2 can have various shapes such as a circular shape and a polygonal shape.

[0053] The second mask MK2 can be disposed on the first mask MK1. The second mask MK2 can have a rectangular shape having a long side extending in the first direction DR1 and a short side extending in the second direction DR2. However, the shape of the second mask MK2 is not limited thereto. The long side and the short side of the second mask MK2 are side surfaces of the second mask MK2 and can be connected to each other to define an edge of the second mask MK2. The second mask MK2 can include a metal.

[0054] The second mask MK2 can include a plurality of mesh portions MSP having a mesh shape. The second mask MK2 can be defined as a mesh mask. The mesh portions MSP can overlap the second opening portions OP2, respectively, when viewed on a plane. Accordingly, the mesh portions MSP can be arranged in the first direction DR1 and the second direction DR2.

[0055] For example, six mesh portions MSP arranged in two rows and three columns are shown, but the number of mesh portions MSP is not limited thereto. For example, the second mask MK2 can include at least one mesh portion MSP overlaid with at least one second open portion OP2.

[0056] The mesh portion MSP can have a shape corresponding to the second open portion OP2. Like the second open portion OP2, the mesh portion MSP can have a rectangular shape extending longer in the second direction DR2 than in the first direction DR1. However, the present application is not limited thereto, and depending on the shape of the second open portion OP2, the mesh portion MSP can have various shapes such as a circular shape or a polygonal shape.

[0057] Each of the mesh portions MSP can include a plurality of mesh lines MSL for defining a mesh shape. The mesh lines MSL can extend in the first direction DR1 and the second direction DR2. The mesh lines MSL extending in the first direction DR1 can be arranged in the second direction DR2, and the mesh lines MSL extending in the second direction DR2 can be arranged in the first direction DR1.

[0058] The mesh shape can be defined by the mesh lines MSL crossing each other. A space between the mesh lines MSL adjacent to each other and crossing each other can be defined as a mesh hole MSH. The mesh hole MSH can have a rectangular shape.

[0059] A fixing portion FP can be provided on the second mask MK2. The fixing portion FP can include a plurality of fixing bars FB1 and FB2 having a bar (or rod) shape. The fixing bars FB1 and FB2 can be adjacent to edges of the second mask MK2. The fixing bars FB1 and FB2 can include a metal. For example, the fixing bars FB1 and FB2 can include invar or stainless steel.

[0060] The fixing bars FB1 and FB2 can include a plurality of first fixing bars FB1 extending in the first direction DR1 and spaced apart from each other in the second direction DR2, and a plurality of second fixing bars FB2 extending in the second direction DR2 and spaced apart from each other in the first direction DR1.

[0061] A blocking portion BLP can be provided on the mesh portion MSP. A predetermined number of blocking portions BLP can be provided on a corresponding mesh portion MSP among the mesh portions MSP. For example, two blocking portions BLP can be provided on a corresponding mesh portion MSP among the mesh portions MSP. However, the number of blocking portions BLP provided on the mesh portion MSP is not limited thereto. For example, at least one blocking portion BLP can be provided on a corresponding mesh portion MSP. The blocking portion BLP can include a metal.

[0062] Figure 2 is toFigure 1 perspective view of a mask shown in FIG. 1. Figure 3 is when viewed from above Figure 2 plan view of a mask shown in FIG. 1.

[0063] Referring to Figure 2 and Figure 3 The edge of the first mask MK1 and the edge of the second mask MK2 can be disposed adjacent to the edge of the mask frame MF when viewed on a plane. The edge of the first mask MK1 and the edge of the second mask MK2 can not be superimposed with the edge of the mask frame MF. However, this is shown by way of example, and the edge of the first mask MK1 and the edge of the second mask MK2 can be superimposed with the edge of the mask frame MF.

[0064] The edge of the second mask MK2 can be superimposed with the edge of the first mask MK1 when viewed on a plane. However, this is shown by way of example, and the edge of the second mask MK2 can not be superimposed with the edge of the first mask MK1, but can be adjacent to the edge of the first mask MK1.

[0065] The fixed portion FP can extend along the edge of the second mask MK2 to surround the mesh portion MSP when viewed on a plane. For example, the first fixed bar FB1 and the second fixed bar FB2 can be disposed along the edge of the second mask MK2 to surround the mesh portion MSP when viewed on a plane. The second open portion OP2 superimposed with the mesh portion MSP can also be surrounded by the first fixed bar FB1 and the second fixed bar FB2 when viewed on a plane.

[0066] The outer surface of the fixed portion FP can be superimposed with the edge of the second mask MK2. For example, the outer-facing side surface of the first fixed bar FB1 and the second fixed bar FB2 can be superimposed with the edge of the second mask MK2.

[0067] The fixed portion FP can be connected to and fixed to the second mask MK2, the first mask MK1, and the mask frame MF by laser welding. For example, laser is irradiated toward the fixed portion FP from above the fixed portion FP, and the fixed portion FP, the second mask MK2, the first mask MK1, and the mask frame MF can be melted by heat according to the energy of the laser and connected to each other. Accordingly, the fixed portion FP, the second mask MK2, the first mask MK1, and the mask frame MF can be connected to and fixed to each other.

[0068] In an embodiment of the present application, the second mask MK2 is not simply fixed to the first mask MK1. The second mask MK2 can be fixed to the first mask MK1, and the fixed portion FP can additionally fix the second mask MK2 on the second mask MK2. The fixed portion FP can more firmly fix the second mask MK2 to the first mask MK1 and the mask frame MF.

[0069] When the second mask MK2 having a sheet shape is fixed to the first mask MK1, the fixing state of the second mask MK2 can be unstable. In an embodiment of the present application, since the fixing portion FP additionally fixes the second mask MK2 on the second mask MK2, the second mask MK2 can be more firmly fixed.

[0070] The first fixing bar FB1 and the second fixing bar FB2 can be disposed adjacent to each other to surround the mesh portion MSP to form a rectangular frame shape. The end of the first fixing bar FB1 and the end of the second fixing bar FB2 can be in contact with each other to form the rectangular frame shape.

[0071] Each of two of the blocking portions BLP among the blocking portions BLP can be disposed on a portion of a corresponding mesh portion MSP among the mesh portions MSP. Exemplarily, the two blocking portions BLP can be disposed adjacent to vertices on the upper side and the right side of the corresponding mesh portion MSP when viewed on a plane. However, the arrangement positions of the two blocking portions BLP are not limited thereto.

[0072] For example, the blocking portion BLP can have a circular shape. However, the present application is not limited thereto, and the blocking portion BLP can have various shapes such as an elliptical shape or a polygonal shape. The blocking portion BLP can be connected to and fixed to the mesh portion MSP by welding. For example, the blocking portion BLP can be connected to and fixed to the mesh line MSL by laser welding.

[0073] Figure 4 is a cross-sectional view taken along the line I-I' shown in Figure 3

[0074] Referring to Figure 4 A line width LW of each of the mesh lines MSL can be 10 μm to 20 μm. The line width LW can be defined as a width of each of the mesh lines MSL measured in a direction crossing an extension direction of each of the mesh lines MSL. A first gap GP1 between two of the mesh lines MSL extending in parallel to each other and facing each other can be 0.5 mm to 2 mm.

[0075] The blocking portion BLP can be disposed on and connected to the mesh line MSL. A diameter of the blocking portion BLP can be greater than the first gap GP1. When the diameter of the blocking portion BLP is less than the first gap GP1, the blocking portion BLP can fall through the mesh hole MSH. Since the diameter of the blocking portion BLP is greater than the first gap GP1, the blocking portion BLP can be stably seated on the mesh line MSL. The mesh portion MSP can be a structure for substantially arranging the blocking portion BLP.

[0076] ​Figure 5 is a cross-sectional view taken along Figure 3 line II-II' shown in FIG. 1.

[0077] Figure 5 An example of a mother substrate M_SUB used in manufacturing a display panel is exemplarily illustrated to explain manufacturing steps of the display panel.

[0078] Referring to Figure 5 The mother substrate M_SUB can be disposed on the fixing portion FP. The mother substrate M_SUB can include a plurality of unit substrates U_SUB. Each of the unit substrates U_SUB can be used to manufacture a display panel. The display panel can be manufactured by forming pixels on each of the unit substrates U_SUB and cutting the unit substrates U_SUB.

[0079] The fixing portion FP can support an edge of the mother substrate M_SUB. Through the fixing portion FP, the mother substrate M_SUB can be spaced apart upward from the second mask MK2 by a second gap GP2. The fixing portion FP can have a thickness TH of 600 µm to 2000 µm based on the third direction DR3. That is, the second gap GP2 can be set to 600 µm to 2000 µm according to the thickness of the fixing portion FP.

[0080] Upper and lower surfaces of the fixing portion FP, which are opposite to each other in the third direction DR3, can have a plane defined by the first and second directions DR1 and DR2. The third direction DR3 can be defined as a direction perpendicular to the upper and lower surfaces of the fixing portion FP, respectively.

[0081] The unit substrates U_SUB can be respectively superposed with the mesh portion MSP when viewed on a plane. Also, the unit substrates U_SUB can be respectively superposed with the second opening portion OP2 when viewed on a plane. The unit substrates U_SUB, the mesh portion MSP, and the second opening portion OP2 are disposed within the first opening portion OP1 to be superposed with the first opening portion OP1 when viewed on a plane.

[0082] A plurality of crucibles CR can be disposed under the mask MSK. A nozzle NZ can be disposed on each of the crucibles CR. A deposition material DPM can be accommodated in the crucibles CR. Although not shown in the drawings, a heat source for heating the crucibles CR can be disposed in the crucibles CR. In addition, the crucibles CR, the mask MSK, and the mother substrate M_SUB can be disposed in a vacuum chamber used in a manufacturing process of a display panel.

[0083] The crucible CR can be heated, and the deposition material DPM can be evaporated and sprayed upward through the nozzle NZ. The evaporated deposition material DPM can pass through the first opening portion OP1, the second opening portion OP2, and the mesh portion MSP to be deposited on the lower surface of the unit substrate U_SUB.

[0084] In the peripheral region of each of the second opening portion OP2, since the deposition material DPM is blocked by the first mask MK1, the deposition material DPM can not be provided to the mother substrate M_SUB. Accordingly, the deposition material DPM can not be provided on the portion of the mother substrate M_SUB between the unit substrates U_SUB.

[0085] Figure 6 is an enlarged view showing Figure 5 a portion of the mask shown in

[0086] Exemplarily, Figure 6 is shown in Figure 4 corresponding cross-section, and the injection direction of the deposition material DPM is shown by Figure 6 a dotted arrow in

[0087] Referring to Figure 6 , the deposition material DPM can be provided on the unit substrate U_SUB through the mesh hole MSH. The deposition material DPM can have a predetermined spray angle and can advance upward. As described above, the mesh portion MSP can be spaced apart from the unit substrate U_SUB by the second gap GP2.

[0088] In this case, even if some of the deposition material DPM is blocked by the mesh line MSL, the deposition material DPM having the predetermined spray angle and advancing upward can pass through the mesh hole MSH and be normally deposited on the unit substrate U_SUB.

[0089] When the mesh portion MSP and the unit substrate U_SUB contact each other, the deposition material DPM can not be deposited on the portion of the unit substrate U_SUB which overlaps the mesh line MSL. That is, the mesh line MSL can function as a mask.

[0090] Since the deposition material DPM has the predetermined spray angle and advances upward, as the mesh portion MSP and the unit substrate U_SUB move away from each other, the portion of the unit substrate U_SUB on which the deposition material DPM is not deposited decreases. When the mesh portion MSP and the unit substrate U_SUB are spaced apart by a certain gap or more, the deposition material DPM can be deposited throughout the entire unit substrate U_SUB.

[0091] When the line width Lw of each of the grid lines MSL is 10 μm to 20 μm, the first gap GP1 between the grid lines MSL is 0.5 mm to 2 mm, and the second gap GP2 between the grid portion MSP and the unit substrate U_SUB is greater than or equal to 600 μm, the deposition material DPM can be deposited on the entire unit substrate U_SUB.

[0092] Even if the deposition material DPM advances upward at the predetermined spray angle, the deposition material DPM can be blocked by the blocking portion BLP depending on the size of the blocking portion BLP. That is, the blocking portion BLP can function as a mask that blocks the advance of the deposition material DPM. Accordingly, the deposition material DPM can not be provided on the portion of the unit substrate U_SUB that overlaps with the blocking portion BLP.

[0093] The portion of the unit substrate U_SUB on which the deposition material DPM is not deposited due to the blocking portion BLP can be defined as an area for placing a camera. The portion of the unit substrate U_SUB that overlaps with the blocking portion BLP will be defined as a first area of the display panel, and will be described below.

[0094] Figure 7 is a plan view of a display panel manufactured by using the mask shown in Figure 1

[0095] Referring to Figure 7 , the flat area DS of the display panel DP can include a display area DA and a non-display area NDA surrounding the display area DA and defining a boundary of the display panel DP. The display panel DP can include a plurality of pixels disposed in the display area DA. The structure of the pixel will be described in detail below with reference to Figure 8

[0096] The display panel DP according to an embodiment of the present application 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 the organic light-emitting display panel can include an organic light-emitting material. The light-emitting layer of the quantum dot light-emitting display panel can include quantum dots and quantum rods. Hereinafter, the display panel DP is described as an organic light-emitting display panel.

[0097] The display panel DP can have a rectangular shape having a long side extending in a second direction DR2 and a short side extending in a first direction DR1. However, the present application is not limited thereto, and the display panel DP can have various shapes such as a circular shape or a polygonal shape.

[0098] ​​A plurality of functional elements can be provided on the display panel DP. The functional elements can include a speaker SPK and a camera CAM. The speaker SPK can be provided in the non-display area NDA, and the camera CAM can be provided in the display area DA. The camera CAM can be provided below the display panel DP.

[0099] Figure 8 is an example of a cross-sectional configuration of a pixel provided in the display area DA shown in Figure 7

[0100] For example, one pixel PX is shown, but a plurality of pixels PX can be provided in the display area DA. Figure 8 The pixel PX shown in FIG. 1A can be provided in the display area DA.

[0101] Referring to Figure 8 , the display area DA can include an emission area PXA and a non-emission area NPXA surrounding the emission area PXA. In practice, a plurality of emission areas PXA can be provided in the display area DA.

[0102] The pixel PX can include a light emitting element OLED and a transistor TR connected to the light emitting element OLED. The light emitting element OLED can include a first electrode AE, a second electrode CE, a hole control layer HCL, an electron control layer ECL, and a light emitting layer EML. The first electrode AE can be an anode electrode, and the second electrode CE can be a cathode electrode.

[0103] The transistor TR and the light emitting element OLED can be provided on a substrate SUB. The light emitting element OLED can be provided in the emission area PXA, and the transistor TR can be provided in the non-emission area NPXA. A buffer layer BFL is provided on the substrate SUB, and the buffer layer BFL can include an inorganic material.

[0104] A semiconductor layer SM of the transistor TR can be provided on the buffer layer BFL. The semiconductor layer SM can include a semiconductor made of an inorganic material such as amorphous silicon or polycrystalline silicon, or an organic semiconductor. In addition, the semiconductor layer SM can include an oxide semiconductor. Although not shown in FIG. 1A, the semiconductor layer SM can include a source region, a drain region, and a channel region between the source region and the drain region. Figure 8

[0105] A first insulating layer INS1 can be provided on the buffer layer BFL to cover the semiconductor layer SM. The first insulating layer INS1 can include an inorganic material. A gate electrode GE of the transistor TR, which is superposed on the semiconductor layer SM, can be provided on the first insulating layer INS1. The gate electrode GE can be provided to be superposed on the channel region of the semiconductor layer SM.

[0106] ​​A second insulating layer INS2 may be disposed on the first insulating layer INS1 to cover the gate electrode GE. The second insulating layer INS2 may include organic and / or inorganic materials.

[0107] The source electrode SE and drain electrode DE of transistor TR can be disposed on the second insulating layer INS2 and spaced apart from each other. The source electrode SE can be connected to the source region of semiconductor layer SM through a first contact hole CH1 defined in the first insulating layer INS1 and the second insulating layer INS2. The drain electrode DE can be connected to the drain region of semiconductor layer SM through a second contact hole CH2 defined in the first insulating layer INS1 and the second insulating layer INS2.

[0108] A third insulating layer INS3 may be disposed on the second insulating layer INS2 to cover the source electrode SE and drain electrode DE of the transistor TR. The third insulating layer INS3 may include an organic material. A connection electrode CNE may be disposed on the third insulating layer INS3. The connection electrode CNE may be connected to the drain electrode DE through a third contact hole CH3 defined in the third insulating layer INS3.

[0109] A fourth insulating layer INS4 may be disposed on the third insulating layer INS3 to cover the connecting electrode CNE. A first electrode AE ​​may be disposed on the fourth insulating layer INS4. The first electrode AE ​​may be connected to the connecting electrode CNE through a fourth contact hole CH4 defined in the fourth insulating layer INS4.

[0110] A pixel defining layer (PDL) that exposes a predetermined portion of the first electrode AE ​​can be disposed on the first electrode AE ​​and the fourth insulating layer INS4. An opening portion (PX_OP) for exposing the predetermined portion of the first electrode AE ​​can be defined in the pixel defining layer (PDL).

[0111] The hole control layer (HCL) can be disposed on the first electrode (AE) and the pixel definition layer (PDL). The HCL can be commonly disposed in the emitter region (PXA) and the non-emitter region (NPXA). The HCL may include a hole transport layer and may also include a hole injection layer.

[0112] The emissive layer EML can be disposed on the hole control layer HCL. The emissive layer EML can be disposed in the region corresponding to the opening portion PX_OP. That is, the emissive layers EML can be formed to be separated from each other within the pixel PX. The emissive layer EML can include organic and / or inorganic materials. The emissive layer EML can generate any one of red, green, and blue light. However, the invention is not limited thereto; the emissive layer EML can generate white light by combining red, green, and blue organic materials.

[0113] An electron control layer ECL can be disposed on the light emitting layer EML. The electron control layer ECL can be disposed on the hole control layer HCL to cover the light emitting layer EML. That is, the electron control layer ECL can be commonly disposed in the emission area PXA and the non-emission area NPXA. The electron control layer ECL can include an electron transport layer, and can further include an electron injection layer.

[0114] A second electrode CE can be disposed on the electron control layer ECL. The second electrode CE can be commonly disposed throughout the pixel PX. A thin film encapsulation layer TFE can be disposed on the second electrode CE.

[0115] Layers from the buffer layer BFL to the fourth insulating layer INS4 can be defined as a circuit element layer DP-CL. Layers from the first electrode AE to the second electrode CE can be defined as a display element layer DP-OLED.

[0116] A first voltage can be applied to the first electrode AE, and a second voltage having a level lower than that of the first voltage can be applied to the second electrode CE. Holes and electrons injected into the light emitting layer EML recombine to form excitons, and the light emitting element OLED can emit light when the excitons transition to a ground state. The light emitting element OLED can emit light to display an image.

[0117] Figure 9 is a cross-sectional view taken along Figure 7 line III-III' shown in FIG. 3.

[0118] According to necessity described below, the Figure 6 .

[0119] Referring to Figure 6 and Figure 9 , the display panel DP can include a first area A1. The first area A1 can overlap the blocking portion BLP. The camera CAM can be disposed below the first area A1. If the light emitting element OLED displaying an image is disposed in the first area A1, the camera CAM can have difficulty in capturing an external image. Accordingly, the light emitting element OLED can not be disposed in the first area A1. For example, the display element layer DP-OLED can not be formed in the first area A1.

[0120] In order not to provide the deposition material DPM in the first area A1, the second mask MK2 can be used. For example, when the second electrode CE, the hole control layer HCL, and the electron control layer ECL disposed in both the emission area PXA and the non-emission area NPXA are formed, the second mask MK2 can be used.

[0121] When a deposition material for forming the second electrode CE, the hole control layer HCL, and the electron control layer ECL is deposited on the substrate SUB, the deposition material can not be provided in the first area A1 because the deposition material is blocked by the blocking portion BLP. Accordingly, the light emitting element OLED can not be formed in the first area A1. The camera CAM can capture an external image by using the external light OL provided through the first area A1.

[0122] Although not shown in the drawings, the first electrode AE and the light emitting layer EML can not be formed in the first area A1. However, in order not to form the first electrode AE and the light emitting layer EML in the first area A1, a mask different from the second mask MK2 can be used.

[0123] Figure 10 is an exemplary view illustrating a display device manufactured using a display panel shown in FIG. 1. Figure 7 is a view illustrating a cross-section of a display device manufactured using a display panel shown in FIG. 1.

[0124] Referring to Figure 10 , the display device DD can include the display panel DP, the input detection unit ISP, the anti-reflection layer RPL, the window WIN, the cover layer CVL, and the first to third adhesive layers AL1 to AL3. The input detection unit ISP, the anti-reflection layer RPL, and the window WIN are disposed on the display panel DP, and the cover layer CVL can be disposed under the display panel DP.

[0125] The input detection unit ISP can be disposed on the display panel DP. The input detection unit ISP can include a plurality of sensor units (not shown) for detecting an external input. The sensor units can sense the external input in a capacitive manner. When the display panel DP is manufactured, the input detection unit ISP can be directly manufactured on the display panel DP. However, the present application is not limited thereto, and the input detection unit ISP can be manufactured as a separate panel from the display panel DP and then attached to the display panel DP through an adhesive layer.

[0126] The anti-reflection layer RPL can be disposed on the input detection unit ISP. The anti-reflection layer RPL can be defined as an external light anti-reflection film. The anti-reflection layer RPL can reduce a reflectance of external light incident on the display panel DP from above the display device DD. For example, the anti-reflection layer RPL can include a phase retarder and / or a polarizer.

[0127] The window WIN can be disposed on the anti-reflection layer RPL. The window WIN can protect the display panel DP, the input detection unit ISP, and the anti-reflection layer RPL from external scratches and impacts. The window WIN can have optical transparency properties.

[0128] A cover layer CVL can be disposed under the display panel DP. The cover layer CVL can absorb an external impact applied to a lower portion of the display device DD to protect the display panel DP. The cover layer CVL can include a foam sheet having a predetermined elasticity. An opening portion OP can be defined in the cover layer CVL. The camera CAM can be disposed in the opening portion OP.

[0129] A first adhesive layer AL1 can be disposed between the display panel DP and the cover layer CVL. The display panel DP and the cover layer CVL can be bonded to each other by the first adhesive layer AL1. A second adhesive layer AL2 can be disposed between the anti-reflection layer RPL and the input detection unit ISP. The anti-reflection layer RPL and the input detection unit ISP can be adhered to each other by the second adhesive layer AL2. A third adhesive layer AL3 can be disposed between the window WIN and the anti-reflection layer RPL. The window WIN and the anti-reflection layer RPL can be adhered to each other by the third adhesive layer AL3.

[0130] Figure 11 to Figure 15 is a view showing a configuration of a fixing portion according to various embodiments of the present application.

[0131] Hereinafter, configurations of the fixing portions FP_1, FP_2, FP_3, and FP_4 shown in FIGS. 1 to 3 will be described with emphasis on configurations different from that of the fixing portion FP shown in FIG. 1. Figure 1 Figure 11 to Figure 15 The components of the fixing portions FP_1, FP_2, FP_3, and FP_4 shown in FIGS. 1 to 3 can be the same as those of the fixing portion FP shown in FIG. 1. Figure 11 to Figure 15 The fixing portions FP_1, FP_2, FP_3, and FP_4 shown in FIGS. 1 to 3 can be disposed on the second mask MK2 along edges of the second mask MK2 like the fixing portion FP shown in FIG. 1. Figure 1

[0132] Referring to FIG. 2, Figure 11 The fixing portion FP_1 can include a first fixing portion FP1 and a second fixing portion FP2 disposed adjacent to each other. The first fixing portion FP1 can have an "L" shape. The second fixing portion FP2 can face the first fixing portion FP1 and have a shape in which the letter "L" is rotated by 180 degrees.

[0133] Referring to FIG. 3, Figure 12 The fixing portion FP_2 can have a rectangular frame shape. Unlike the fixing portion FP shown in FIG. 1, the fixing portion FP_2 can not be divided into a plurality of fixing bars FB1 and FB2 but can have an integrated frame shape. Figure 1

[0134] Referring to FIG. 4, Figure 13 A first groove G1 can be defined on an upper surface of the fixing portion FP_3. The first groove G1 can be defined in a predetermined portion of the upper surface of the fixing portion FP_3 and can extend along an extension direction of the fixing portion FP_3. ​​​

[0135] Specifically, the fixing portion FP_3 can include a plurality of first fixing bars FB1_1 and a plurality of second fixing bars FB2_1 like the fixing portion FP shown in FIG. 1. Figure 1 The first fixing bars FB1_1 can extend in the first direction DR1 and can be spaced apart from each other in the second direction DR2. The second fixing bars FB2_1 can extend in the second direction DR2 and can be spaced apart from each other in the first direction DR1.

[0136] The first groove G1 is defined in a predetermined portion of the upper surface of each of the first fixing bars FB1_1, and the first groove G1 defined in each of the first fixing bars FB1_1 can extend in the first direction DR1. The first groove G1 is defined in a predetermined portion of the upper surface of each of the second fixing bars FB2_1, and the first groove G1 defined in each of the second fixing bars FB2_1 can extend in the second direction DR2.

[0137] Figure 14 is a view showing a state in which the fixing portion FP_3 shown in FIG. 2 is bonded to the second mask, the first mask, and the mask frame by welding. Figure 13 is a view showing a state in which the fixing portion FP_3 shown in FIG. 2 is bonded to the second mask, the first mask, and the mask frame by welding.

[0138] As an example, Figure 14 is shown in a cross-sectional view.

[0139] Referring to Figure 14 Laser welding can be performed through the first groove G1 of the fixing portion FP_3. During the welding process, a protrusion PT can be formed on the fixing portion FP_3. For example, a portion of the fixing portion FP_3 can be melted to form the protrusion PT. The protrusion PT can be disposed in the first groove G1.

[0140] When the first groove G1 is not formed in the fixing portion FP_3 and the protrusion PT is formed on the upper surface of the fixing portion FP_3 due to the welding process, the mother substrate M_SUB placed on the upper surface of the fixing portion FP_3 can be damaged by the protrusion PT. However, in the embodiment of the present application, since the protrusion PT is disposed in the first groove G1, the mother substrate M_SUB is not damaged by the protrusion PT.

[0141] Referring to Figure 15 , the second groove G2 is defined between the upper surface of the fixing portion FP_4 and one side of the fixing portion FP_4, and the second groove G2 can extend along the extension direction of the fixing portion FP_4. The fixing portion FP_4 can include a plurality of first fixing bars FB1_2 and a plurality of second fixing bars FB2_2. The arrangement positions of the first fixing bars FB1_2 and the second fixing bars FB2_2 can be the same as those of the first fixing bars FB1_1 and the second fixing bars FB2_1 of the fixing portion FP_3 shown in FIG. 3. Figure 13The arrangement positions of the first fixing bars FB1_1 and the second fixing bars FB2_1 shown in FIG. 1A are the same.

[0142] A second groove G2 can be defined in the first fixing bars FB1_2 and the second fixing bars FB2_2. The second groove G2 is defined between the upper surface of each of the first fixing bars FB1_2 and the second fixing bars FB2_2 and one side of each of the first fixing bars FB1_2 and the second fixing bars FB2_2 to extend along the extension direction of each of the first fixing bars FB1_2 and the second fixing bars FB2_2.

[0143] Figure 16 is a perspective view of a mask according to another embodiment of the present application. Figure 17 is a plan view of a mask when viewed from above. Figure 16 is a plan view of a mask shown in FIG. 1A. Figure 18 is a sectional view taken along Figure 17 is a sectional view taken along line IV-IV' shown in FIG. 1A.

[0144] The configuration of the mask MSK_1 can be the same as that of the mask MSK shown in FIG. 1A except for the assembly of the second mask MK2' and the fixing portions FP_5. Figure 1 Figure 1 Therefore, hereinafter, the configuration of the mask MSK_1 will be mainly described in a configuration different from that of the mask MSK shown in FIG. 1A, and the same reference numerals will be used to show the same configuration.

[0145] Referring to Figure 16 and Figure 17 , the mask MSK_1 can include a plurality of second masks MK2' and a plurality of fixing portions FP_5 respectively disposed on the second masks MK2'. Each of the second masks MK2' can include a mesh portion MSP. The mesh portion MSP of the second mask MK2' can respectively overlap the second opening portion OP2. A blocking portion BLP can be disposed on the mesh portion MSP.

[0146] Each of the fixing portions FP_5 can include a plurality of first fixing bars FB1_3 and a plurality of second fixing bars FB2_3. The configurations of the first fixing bars FB1_3 and the second fixing bars FB2_3 can be substantially the same as those of the first fixing bars FB1 and the second fixing bars FB2 shown in FIG. 1A except for their sizes. Figure 1

[0147] Referring to Figure 17 and Figure 18 ​​Each edge of the second mask MK2' can be adjacent to a corresponding second opening OP2 in the second opening OP2, to be positioned outside the corresponding second opening OP2. When viewed in a plane, each of the fixing parts FP_5 can be positioned around a corresponding mesh part MSP in the mesh part MSP and a corresponding second opening OP2 in the second opening OP2. The fixing parts FP_5 can be fixed to the second mask MK2' and the first mask MK1 by laser welding.

[0148] Reference Figure 18 The fixing part FP_5 can be connected to the portion of the second mask MK2' adjacent to its edge. The portion of the second mask MK2' adjacent to its edge can be connected to the portion of the first mask MK1 adjacent to the second opening portion OP2. The second mask MK2' can be more securely fixed to the first mask MK1 via the fixing part FP_5.

[0149] Figure 19 This is a view showing the construction of the fixed portion according to another embodiment of the present invention.

[0150] Figure 19 An example is shown with Figure 18 The corresponding cross-section. Besides the cross-sectional shape... Figure 19 The fixed part FP_6 shown has the same Figure 18 The fixed part FP_5 shown has the same construction. Therefore, the cross-sectional shape of the fixed part FP_6 will be described in detail below.

[0151] Reference Figure 19 The side of the fixed portion FP_6 adjacent to the second opening portion OP2 may include a first inclined surface SLP1 and a second inclined surface SLP2. The other side of the fixed portion FP_6 opposite to one side of the fixed portion FP_6 may have a shape symmetrical to one side of the fixed portion FP_6.

[0152] The first inclined surface SLP1 can extend from the inner edge I_EG of the fixed portion FP_6 adjacent to the second opening portion OP2 toward the upper surface US of the fixed portion FP_6, which is positioned above the inner edge I_EG. The second inclined surface SLP2 can extend from the inner edge I_EG of the fixed portion FP_6 toward the lower surface LS of the fixed portion FP_6, which is positioned below the inner edge I_EG. When viewed in a plane, the inner edge I_EG of the fixed portion FP_6 can be closer to the second opening portion OP2 than the upper surface US and the lower surface LS of the fixed portion FP_6.

[0153] The first inclined surface SLP1 and the second inclined surface SLP2 can form an angle greater than 0 degrees and less than 90 degrees with respect to the third direction DR3. Preferably, the first inclined surface SLP1 and the second inclined surface SLP2 can form an angle of 30 degrees to 60 degrees with respect to the third direction DR3.

[0154] Figure 20 is a view showing the deposition material sprayed toward the fixing portion FP_6. Figure 19 is a view showing the deposition material sprayed toward the fixing portion FP_6.

[0155] Referring to FIG. 6, the fixing portion FP_6 has a first inclined surface SLP1 and a second inclined surface SLP2. Figure 20 Compared to the fixing portion having a rectangular cross section (shown by a dotted line), in which the region in which the deposition material DPM is disposed can be further expanded in the fixing portion FP_6 having the first inclined surface SLP1 and the second inclined surface SLP2. In this case, the deposition material DPM can be disposed in a wider region.

[0156] Although described with reference to the embodiments, it will be understood by those skilled in the art that various modifications and changes can be made thereto without departing from the spirit and scope of the present application described in the appended claims. In addition, the embodiments disclosed in the present application are not intended to limit the technical idea of the present application, and all technical ideas within the scope of the appended claims and equivalents thereof should be interpreted as included in the scope of the present application.

[0157] Industrial applicability

[0158] When the mask used in manufacturing the display panel is more firmly fixed, the yield of the display panel increases, and thus the present application has high industrial applicability.

Claims

1. A mask, the mask comprising: A mask frame, wherein the first opening portion is defined within the mask frame; A first mask is disposed on the mask frame, and a second opening portion overlapping the first opening portion is defined within the first mask; The second mask includes a grid portion having a grid shape that overlaps with the second opening portion and is disposed on the first mask; as well as A fixing portion is disposed on the upper surface of the second mask and extends along the edge of the second mask to surround the mesh portion. The fixed portion, the second mask, the first mask, and the mask frame are connected and fixed to each other by laser welding, and The fixing part includes a plurality of fixing strips disposed along the edge of the second mask.

2. The mask according to claim 1, wherein, The fixing strip includes: A plurality of first fixing bars extend in a first direction and are spaced apart from each other in a second direction intersecting the first direction; and Multiple second fixing strips extend in the second direction and are spaced apart from each other in the first direction.

3. A mask, the mask comprising: A mask frame, wherein the first opening portion is defined within the mask frame; A first mask is disposed on the mask frame, and a second opening portion overlapping the first opening portion is defined within the first mask; The second mask includes a grid portion having a grid shape that overlaps with the second opening portion and is disposed on the first mask; as well as A fixing portion is disposed on the upper surface of the second mask and extends along the edge of the second mask to surround the mesh portion. The fixed portion, the second mask, the first mask, and the mask frame are connected and fixed to each other by laser welding, and The fixing part includes: a first fixing part having an "L" shape; and a second fixing part facing the first fixing part and having the shape of the "L" shape rotated 180 degrees.

4. A mask, the mask comprising: A mask frame, wherein the first opening portion is defined within the mask frame; A first mask is disposed on the mask frame, and a second opening portion overlapping the first opening portion is defined within the first mask; The second mask includes a grid portion having a grid shape that overlaps with the second opening portion and is disposed on the first mask; as well as A fixing portion is disposed on the upper surface of the second mask and extends along the edge of the second mask to surround the mesh portion. The fixed portion, the second mask, the first mask, and the mask frame are connected and fixed to each other by laser welding, and The fixed part has a rectangular frame shape.

5. The mask according to any one of claims 1, 3, and 4, wherein, The fixed portion has a thickness of 600 micrometers to 2000 micrometers.

6. The mask according to any one of claims 1, 3, and 4, wherein, The grid portion includes multiple grid lines that define the shape of the grid. Each of the multiple grid lines has a line width of 10 to 20 micrometers.

7. The mask according to claim 6, wherein, The gap between two grid lines that extend parallel to each other and face each other is 0.5 mm to 2 mm.

8. The mask of claim 7, further comprising a blocking portion disposed on a portion of the mesh portion.

9. The mask according to claim 8, wherein, The blocking portion has a circular shape, and the diameter of the blocking portion is larger than the gap between the two grid lines.

10. The mask according to claim 8, wherein, The blocking portion is connected to the grid line.

11. The mask according to any one of claims 1, 3, and 4, wherein, The edges of the first mask and the second mask are adjacent to the edges of the mask frame.

12. The mask according to any one of claims 1, 3, and 4, wherein, The groove is defined on the upper surface of the fixing portion and extends along the extending direction of the fixing portion.

13. The mask according to claim 12, wherein, The groove is defined in a predetermined portion of the upper surface of the fixing portion and extends along the extending direction of the fixing portion.

14. The mask according to claim 12, wherein, The groove is defined between the upper surface of the fixing portion and one side of the fixing portion, and extends along the extending direction of the fixing portion.

15. The mask according to any one of claims 1, 3, and 4, wherein, The edge of the second mask is adjacent to the second opening portion and is disposed outside the second opening portion.

16. The mask according to claim 15, wherein, The fixing portion is connected to the portion of the second mask adjacent to the edge of the second mask. The portion of the second mask is connected to the portion of the first mask adjacent to the second opening portion.

17. The mask according to claim 15, wherein, The fixed portion includes: The inner edge is adjacent to the second opening portion; A first inclined surface, extending from the inner edge toward the fixed portion, is configured to be an upper surface higher than the inner edge; and The second inclined surface extends from the inner edge toward the fixed portion, and is configured to be a lower surface below the inner edge. The inner edge is closer to the second opening portion than the upper surface and the lower surface of the fixed portion.

18. The mask according to claim 17, wherein, The first inclined surface and the second inclined surface form an angle of 30 to 60 degrees with respect to the direction perpendicular to the upper surface.

Images