Display device

Abstract

The display device includes: a first pixel electrode disposed on a substrate; a first organic functional layer disposed on the first pixel electrode; a first auxiliary electrode disposed on the first organic functional layer and overlapping a first side of the first organic functional layer; and a common electrode disposed on the first auxiliary electrode and covering the first organic functional layer and the first auxiliary electrode.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to a display device and a method of manufacturing a display device, and more particularly, to a display device including an auxiliary electrode and a method of manufacturing a display device. BACKGROUND

[0002] Generally, a display device is a device that displays an image, and examples of the display device include an organic light emitting display device and a liquid crystal display device. Generally, the organic light emitting display device includes an organic emission layer interposed between a pixel electrode and a common electrode. When the two electrodes inject an electron and a hole into the organic emission layer, respectively, light is emitted according to recombination of the electron and the hole. SUMMARY

[0003] According to embodiments of the present disclosure, a display device includes a first pixel electrode disposed on a substrate, a first organic functional layer disposed on the first pixel electrode, a first auxiliary electrode disposed on the first organic functional layer and overlapping a first side of the first organic functional layer, and a common electrode disposed on the first auxiliary electrode and covering the first organic functional layer and the first auxiliary electrode.

[0004] In embodiments of the present disclosure, a boundary of the first auxiliary electrode is aligned with a boundary of the first organic functional layer.

[0005] In embodiments of the present disclosure, the first auxiliary electrode does not overlap a central portion of the first organic functional layer.

[0006] In embodiments of the present disclosure, the first auxiliary electrode contacts the common electrode.

[0007] In embodiments of the present disclosure, the first auxiliary electrode is interposed between the first organic functional layer and the common electrode.

[0008] In embodiments of the present disclosure, the first auxiliary electrode includes a same material as a material of the common electrode.

[0009] In embodiments of the present disclosure, the first auxiliary electrode includes a different material from a material of the common electrode.

[0010] In embodiments of the present disclosure, the display device further includes an inorganic capping layer covering the first organic functional layer and spaced apart from the first auxiliary electrode.

[0011] In embodiments of the present disclosure, the display device further includes a spacer disposed on the inorganic capping layer and spaced apart from the first auxiliary electrode.

[0012] In an embodiment of the disclosure, the first auxiliary electrode includes: a 1-1 auxiliary electrode overlapping a first side of the first organic functional layer; and a 1-2 auxiliary electrode overlapping a second side of the first organic functional layer opposite the first side.

[0013] In an embodiment of the disclosure, the display device further includes: a second pixel electrode disposed on the substrate and spaced apart from the first pixel electrode; a second organic functional layer disposed on the second pixel electrode; a 2-1 auxiliary electrode disposed on the second organic functional layer and overlapping a first side of the second organic functional layer; and a 2-2 auxiliary electrode disposed on the second organic functional layer and overlapping a second side of the second organic functional layer opposite the first side.

[0014] In an embodiment of the disclosure, the first auxiliary electrode does not overlap a second side of the first organic functional layer opposite the first side.

[0015] In an embodiment of the disclosure, the display device further includes: a second pixel electrode disposed on the substrate and spaced apart from the first pixel electrode; a second organic functional layer disposed on the second pixel electrode; and a second auxiliary electrode disposed on the second organic functional layer and overlapping a first side of the second organic functional layer, wherein the second auxiliary electrode does not overlap a second side of the second organic functional layer opposite the first side.

[0016] In an embodiment of the disclosure, the display device further includes: a second pixel electrode disposed on the substrate and spaced apart from the first pixel electrode; and a second organic functional layer disposed on the second pixel electrode, wherein the common electrode covers an entire surface of the second organic functional layer.

[0017] According to an embodiment of the disclosure, a method of manufacturing a display device includes: forming a first pixel electrode on a substrate; forming a first organic functional layer on the first pixel electrode; forming a preliminary first auxiliary electrode layer on the first organic functional layer, wherein the preliminary first auxiliary electrode layer contacts the first organic functional layer; forming a first auxiliary electrode by patterning the preliminary first auxiliary electrode layer, wherein the first auxiliary electrode overlaps a first side of the first organic functional layer; and forming a common electrode on the first auxiliary electrode, wherein the common electrode covers the first organic functional layer and the first auxiliary electrode.

[0018] In an embodiment of the disclosure, the method further includes: forming a preliminary inorganic capping layer on the preliminary first auxiliary electrode layer; removing, by a first etching process, a portion of the preliminary inorganic capping layer overlapping a central portion of the first organic functional layer; and forming the first auxiliary electrode layer by removing, by the first etching process, a portion of the preliminary first auxiliary electrode layer overlapping the central portion of the first organic functional layer.

[0019] In an embodiment of the disclosure, the method further includes removing, by a second etching process, a portion of the preliminary inorganic capping layer overlapping with the first side of the first organic functional layer; and forming the preliminary first auxiliary electrode by removing, by the second etching process, a portion of the first auxiliary electrode layer overlapping with the central portion of the first organic functional layer.

[0020] In an embodiment of the disclosure, the first auxiliary electrode is formed by a third etching process by removing a portion of the preliminary first auxiliary electrode overlapping with the central portion of the first organic functional layer.

[0021] In an embodiment of the disclosure, the method further includes forming a second pixel electrode on the substrate, wherein the second pixel electrode is spaced apart from the first pixel electrode; depositing a first organic functional material layer covering the first pixel electrode and the second pixel electrode; depositing a first auxiliary electrode material layer on the first organic functional material layer; and forming the first organic functional layer and the preliminary first auxiliary electrode layer together by patterning the first organic functional material layer and the first auxiliary electrode material layer.

[0022] In an embodiment of the disclosure, the method further includes depositing a second organic functional material layer on the first organic functional layer and the preliminary first auxiliary electrode layer; depositing a second auxiliary electrode material layer on the second organic functional material layer; and forming the second organic functional layer and the preliminary second auxiliary electrode layer together by patterning the second organic functional material layer and the second auxiliary electrode material layer. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other features of the present disclosure will become more apparent by describing in detail embodiments thereof with reference to the attached drawings.

[0024] Figure 1 is a plan view illustrating a display device according to an embodiment of the present disclosure.

[0025] Figure 2 is a cross-sectional view illustrating Figure 1 a display device.

[0026] Figure 3 is a cross-sectional view illustrating a transistor layer included in Figure 2 a display device.

[0027] Figure 4 is a cross-sectional view illustrating a thin film encapsulation layer, a color conversion layer, and a glass encapsulation layer included in Figure 2 a display device.

[0028] Figure 5 is a cross-sectional view illustrating an emission layer included in Figure 2 a display device.

[0029] Figure 6 ,Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 、 Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 、 Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 、 Figure 28 、 Figure 29 、 Figure 30 、 Figure 31 and Figure 32 are cross-sectional views illustrating a method of manufacturing an emission layer of a display device. Figure 5

[0030] Figure 33 is a plan view illustrating a display device according to an embodiment of the present disclosure.

[0031] Figure 34 is a cross-sectional view illustrating an emission layer included in a display device of Figure 33

[0032] Figure 35 is a plan view illustrating a display device according to an embodiment of the present disclosure.

[0033] Figure 36 is a cross-sectional view illustrating an emission layer included in a display device of Figure 35 DETAILED DESCRIPTION

[0034] The illustrative and non-limiting embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 is a plan view illustrating a display device according to an embodiment of the present disclosure. Figure 2 is a cross-sectional view illustrating a display device of Figure 1

[0036] Reference is made to Figure 1 ​​​​The display apparatus 1000 according to an embodiment of the disclosure can include at least one pixel, and the pixel can include at least one sub-pixel. For example, the display apparatus 1000 can include a plurality of pixels, and each of the pixels can include a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. Each of the pixels can be formed in the same structure, and can be arranged in a matrix form along a first direction D1 and a second direction D2 intersecting the first direction D1. Also, each of the pixels can have a thickness in a third direction D3 substantially perpendicular to the first direction D1 and the second direction D2.

[0037] In an embodiment of the disclosure, the first sub-pixel SPX1 can emit blue light, and the second sub-pixel SPX2 can emit red light. Also, the third sub-pixel SPX3 can emit green light. The display apparatus 1000 can display an image by combining light emitted from the first to third sub-pixels SPX1, SPX2, and SPX3.

[0038] In an embodiment of the disclosure, the display apparatus 1000 can include a 1-1 auxiliary electrode AE1-1, a 1-2 auxiliary electrode AE1-2, a 2-1 auxiliary electrode AE2-1, a 2-2 auxiliary electrode AE2-2, a 3-1 auxiliary electrode AE3-1, and a 3-2 auxiliary electrode AE3-2. For example, the 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 can correspond to the first sub-pixel SPX1, and the 2-1 auxiliary electrode AE2-1 and the 2-2 auxiliary electrode AE2-2 can correspond to the second sub-pixel SPX2. Also, the 3-1 auxiliary electrode AE3-1 and the 3-2 auxiliary electrode AE3-2 can correspond to the third sub-pixel SPX3.

[0039] Reference Figure 2 The display apparatus 1000 can include a substrate SUB, a transistor layer TL, an emission layer EL, a thin film encapsulation layer TFE, a color conversion layer CCL, and a glass encapsulation layer ENC. The transistor layer TL, the emission layer EL, the thin film encapsulation layer TFE, the color conversion layer CCL, and the glass encapsulation layer ENC can be sequentially stacked on the substrate SUB.

[0040] The transistor layer TL can generate a driving current, and the emission layer EL can emit light corresponding to the driving current. The thin film encapsulation layer TFE can prevent moisture and external air from penetrating into the emission layer EL. The color conversion layer CCL can convert a color of light emitted from the emission layer EL, and the glass encapsulation layer ENC can protect the emission layer EL and the color conversion layer CCL from impact.

[0041] Figure 3 is a cross-sectional view illustrating a transistor layer included in a display apparatus according to an embodiment of the disclosure. Figure 2 is a cross-sectional view illustrating a transistor layer included in a display apparatus according to an embodiment of the disclosure. Figure 4is a cross-sectional view illustrating a thin film encapsulation layer, a color conversion layer, and a glass encapsulation layer included in a display device of Figure 2

[0042] Referring to Figure 3 The transistor layer TL can include a buffer layer BFR, an active pattern ACT, a first gate insulating layer GI1, a first gate electrode GAT1, a second gate insulating layer GI2, a second gate electrode GAT2, an interlayer insulating layer ILD, a source electrode SE, a drain electrode DE, and a via insulating layer VIA.

[0043] In an embodiment of the disclosure, the substrate SUB can be formed of glass, quartz, plastic, or the like. Examples of materials that can be used as plastic can include polyimide (PI), polyacrylate, polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene naphthalate (PEN), polyvinylidene chloride, polyvinylidene fluoride (PVDF), polystyrene, ethylene vinyl alcohol copolymer, polyether sulfone (PES), polyetherimide (PEI), polyphenylene sulfide (PPS), polyallylate, cellulose triacetate (TAC), cellulose acetate propionate (CAP), or the like. These materials can be used alone or in combination with each other.

[0044] The buffer layer BFR can be disposed on the substrate SUB. In an embodiment of the disclosure, the buffer layer BFR can be formed of an inorganic material. Examples of materials that can be used as the inorganic material can include silicon oxide, silicon nitride, silicon oxynitride, or the like. These materials can be used alone or in combination with each other. The buffer layer BFR can prevent metal atoms or impurities from penetrating into the active pattern ACT. In addition, the buffer layer BFR can control the rate of heat supply during a crystallization process for forming the active pattern ACT.

[0045] The active pattern ACT can be disposed on the buffer layer BFR. In an embodiment of the disclosure, the active pattern ACT can be formed of a silicon semiconductor material or an oxide semiconductor material. Examples of silicon semiconductor materials that can be used as the active pattern ACT can include amorphous silicon and polycrystalline silicon, or the like. Examples of oxide semiconductor materials that can be used as the active pattern ACT can include InGaZnO (IGZO), InSnZnO (ITZO), or the like. In addition, the oxide semiconductor material can include, for example, indium (In), gallium (Ga), tin (Sn), zirconium (Zr), vanadium (V), hafnium (Hf), cadmium (Cd), germanium (Ge), chromium (Cr), titanium (Ti), zinc (Zn), or the like. These materials can be used alone or in combination with each other.

[0046] ​The first gate insulating layer GI1 may be disposed on the buffer layer BFR and may cover the active pattern ACT. In embodiments of this disclosure, the first gate insulating layer GI1 may be formed of an insulating material. Examples of insulating materials that can be used as the first gate insulating layer GI1 may include silicon oxide, silicon nitride, and silicon oxynitride. These materials can be used alone or in combination with each other.

[0047] The first gate electrode GAT1 can be disposed on the first gate insulating layer GI1. In embodiments of this disclosure, the first gate electrode GAT1 can be formed of metal, alloy, conductive metal oxide, transparent conductive material, etc. Examples of materials that can be used as the first gate electrode GAT1 include silver (Ag), silver-containing alloys, molybdenum (Mo), molybdenum-containing alloys, aluminum (Al), aluminum-containing alloys, and aluminum nitride (Al). x N y ), tungsten (W), tungsten nitride (W) x N y ), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (Cr x N y Materials include titanium (Ti), tantalum (Ta), platinum (Pt), scandium (Sc), indium tin oxide (ITO), and indium zinc oxide (IZO). These materials can be used individually or in combination.

[0048] The second gate insulating layer GI2 can be disposed on the first gate insulating layer GI1 and can cover the first gate electrode GAT1. In embodiments of this disclosure, the second gate insulating layer GI2 can be formed of an insulating material.

[0049] The second gate electrode GAT2 can be disposed on the second gate insulating layer GI2. In embodiments of this disclosure, the second gate electrode GAT2 can be formed of metal, alloy, conductive metal oxide, transparent conductive material, etc.

[0050] An interlayer insulating layer (ILD) can be disposed on the second gate insulating layer (GI2) and can cover the second gate electrode (GAT2) and the second gate insulating layer (GI2). In embodiments of this disclosure, the interlayer insulating layer (ILD) can be formed of an insulating material.

[0051] The source electrode SE and drain electrode DE can be disposed on the interlayer insulating layer ILD. In embodiments of this disclosure, the source electrode SE and drain electrode DE can contact the active pattern ACT by penetrating the interlayer insulating layer ILD, the second gate insulating layer GI2, and the first gate insulating layer GI1. The source electrode SE and drain electrode DE can be formed of metal, alloy, conductive metal oxide, transparent conductive material, etc.

[0052] The via insulation layer VIA can be disposed on the interlayer insulation layer ILD, and can cover the source electrode SE and the drain electrode DE. In an embodiment of the disclosure, the via insulation layer VIA can be formed of an organic material. Examples of the organic material can include a photoresist, a polyacrylic resin, a polyimide resin, and an acrylic resin, etc. These materials can be used alone or in combination with each other. Accordingly, the via insulation layer VIA can have a substantially flat top surface.

[0053] Referring to Figure 4 , the thin film encapsulation layer TFE can include a first inorganic layer IL1, an organic layer OL, and a second inorganic layer IL2. The color conversion layer CCL can include a color filter layer CF, a microlens array MLA, and a filler FM.

[0054] The first inorganic layer IL1 can be disposed on the via insulation layer VIA. In an embodiment of the disclosure, the first inorganic layer IL1 can be formed of an inorganic material. The first inorganic layer IL1 can include, for example, silicon oxide, silicon nitride, and silicon oxynitride. These materials can be used alone or in combination with each other.

[0055] The organic layer OL can be disposed on the first inorganic layer IL1. In an embodiment of the disclosure, the organic layer OL can be formed of an organic material. Examples of the organic material can include a photoresist, a polyacrylic resin, a polyimide resin, and an acrylic resin, etc. These materials can be used alone or in combination with each other.

[0056] The second inorganic layer IL2 can be disposed on the organic layer OL, and can be formed of substantially the same material as that of the first inorganic layer IL1.

[0057] The color filter layer CF can include a first color filter CF1, a second color filter CF2, and a third color filter CF3. The first color filter CF1 can convert a color of light emitted from the emission layer EL into blue. The second color filter CF2 can convert a color of light emitted from the emission layer EL into red, and the third color filter CF3 can convert a color of light emitted from the emission layer EL into green.

[0058] In other words, the first color filter CF1 can correspond to the first sub-pixel SPX1. Also, the second color filter CF2 can correspond to the second sub-pixel SPX2, and the third color filter CF3 can correspond to the third sub-pixel SPX3.

[0059] The microlens array MLA can include a plurality of microlenses. The microlens array MLA can create a virtual image from an image provided from the emission layer EL and the color filter layer CF, and can project the virtual image to the user's eye.

[0060] The filler FM can protect the color filter layer CF and the microlens array MLA from impact, and can include a liquid polymer.

[0061] The glass encapsulation layer ENC can be made of glass, and can protect the underlying components from impact. However, the glass encapsulation layer ENC can include other materials in addition to glass.

[0062] Figure 5 is a cross-sectional view illustrating an emission layer included in a display device of Figure 2 . Figure 6 to Figure 32 is a cross-sectional view illustrating a method of manufacturing an emission layer of Figure 5 . For example, Figure 5 is a cross-sectional view taken along line I-I' of Figure 1 .

[0063] Referring to Figure 5 , the emission layer EL can include a first pixel electrode PE1, a second pixel electrode PE2, a third pixel electrode PE3, a first organic functional layer OF1, a second organic functional layer OF2, a third organic functional layer OF3, an inorganic capping layer ICL, a spacer SPC, a 1-1 auxiliary electrode AE1-1, a 1-2 auxiliary electrode AE1-2, a 2-1 auxiliary electrode AE2-1, a 2-2 auxiliary electrode AE2-2, a 3-1 auxiliary electrode AE3-1, a 3-2 auxiliary electrode AE3-2, and a common electrode CE.

[0064] The first pixel electrode PE1 can be disposed on the via insulating layer VIA. The first pixel electrode PE1 can be formed of a metal, an alloy, a metal oxide, a reflective conductive material, or the like. Examples of materials that can be used as the first pixel electrode PE1 can include silver (Ag), a silver-containing alloy, molybdenum (Mo), a molybdenum-containing alloy, aluminum (Al), an aluminum-containing alloy, aluminum nitride (AlN), tungsten (W), tungsten nitride (WN), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (CrN), titanium (Ti), tantalum (Ta), platinum (Pt), scandium (Sc), indium tin oxide (ITO), indium zinc oxide (IZO), or the like. These materials can be used alone or in combination with each other. x N y ), tungsten (W x N y ), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (Cr x N y ), titanium (Ti), tantalum (Ta), platinum (Pt), scandium (Sc), indium tin oxide (ITO), indium zinc oxide (IZO), or the like. These materials can be used alone or in combination with each other.

[0065] The second pixel electrode PE2 and the third pixel electrode PE3 can be disposed on the via insulating layer VIA. In an embodiment of the disclosure, each of the second pixel electrode PE2 and the third pixel electrode PE3 can be spaced apart from the first pixel electrode PE1, and can be formed simultaneously with the first pixel electrode PE1.

[0066] A first organic functional layer OF1 can be disposed on the first pixel electrode PE1. In an embodiment of the disclosure, the first organic functional layer OF1 can include a blue emission layer and at least one common layer. For example, the common layer can include a hole transport layer, an electron transport layer, a charge generation layer, etc. The first pixel electrode PE1 and the first organic functional layer OF1 can correspond to the first sub-pixel SPX1.

[0067] A second organic functional layer OF2 can be disposed on the second pixel electrode PE2. In an embodiment of the disclosure, the second organic functional layer OF2 can include a red emission layer and a common layer. The second pixel electrode PE2 and the second organic functional layer OF2 can correspond to the second sub-pixel SPX2.

[0068] A third organic functional layer OF3 can be disposed on the third pixel electrode PE3. In an embodiment of the disclosure, the third organic functional layer OF3 can include a green emission layer and a common layer. The third pixel electrode PE3 and the third organic functional layer OF3 can correspond to the third sub-pixel SPX3.

[0069] An inorganic capping layer ICL can be disposed on the via insulating layer VIA. In an embodiment of the disclosure, the inorganic capping layer ICL can cover the first to third pixel electrodes PE1, PE2, and PE3 and the first to third organic functional layers OF1, OF2, and OF3, and can contact the first to third pixel electrodes PE1, PE2, and PE3 and the first to third organic functional layers OF1, OF2, and OF3.

[0070] In an embodiment of the disclosure, the inorganic capping layer ICL can be formed of an inorganic material. Examples of materials that can be used as the inorganic material can include silicon oxide, silicon nitride, and silicon oxynitride, etc. These materials can be used alone or in combination with each other.

[0071] In an embodiment of the disclosure, the inorganic capping layer ICL can be formed along the contour of the bottom of the first to third pixel electrodes PE1, PE2, and PE3, and can have a substantially constant thickness. For example, the inorganic capping layer ICL can have a thickness of about 1000 to 3000 A.

[0072] ​A spacer SPC can be disposed on the via insulating layer VIA. In an embodiment of the disclosure, the spacer SPC can be disposed between the first to third pixel electrodes PE1, PE2, and PE3, and can be disposed on the inorganic capping layer ICL. For example, the spacer SPC can contact the inorganic capping layer ICL. Also, the spacer SPC can be spaced apart from the first to third pixel electrodes PE1, PE2, and PE3 and the first to third organic functional layers OF1, OF2, and OF3 without contacting them. For example, the inorganic capping layer ICL can be disposed between the first to third pixel electrodes PE1, PE2, and PE3 and the spacer SPC and between the first to third organic functional layers OF1, OF2, and OF3 and the spacer SPC.

[0073] In an embodiment of the disclosure, the spacer SPC can be formed of an organic material. Examples of the organic material can include a photoresist, a polyacrylic resin, a polyimide resin, and an acrylic resin, etc. These materials can be used alone or in combination with each other. Thus, the spacer SPC can have a substantially flat top surface.

[0074] In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 can be disposed on the first organic functional layer OF1.

[0075] In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1 can overlap the first organic functional layer OF1, and can overlap one side of the first organic functional layer OF1. For example, as shown in FIG. 1A, the 1-1 auxiliary electrode AE1-1 can overlap the first organic functional layer OF1 on the left side of the first organic functional layer OF1. Figure 1 In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1 can extend in the second direction D2.

[0076] In an embodiment of the disclosure, since the 1-1 auxiliary electrode AE1-1 is patterned together with the first organic functional layer OF1, a boundary of the 1-1 auxiliary electrode AE1-1 can coincide with a boundary of the first organic functional layer OF1. For example, a side surface of the 1-1 auxiliary electrode AE1-1 can be coplanar with a side surface of the first organic functional layer OF1. Also, the 1-1 auxiliary electrode AE1-1 can not overlap a central portion of the first organic functional layer OF1.

[0077] In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the 1-1 auxiliary electrode AE1-1 can not contact the inorganic capping layer ICL and the spacer SPC.

[0078] In an embodiment of the disclosure, the 1-2 auxiliary electrode AE1-2 can overlap the first organic functional layer OF1, and can overlap another side of the first organic functional layer OF1 opposite to the one side. For example, as shown in FIG. 1A, the 1-2 auxiliary electrode AE1-2 can overlap the first organic functional layer OF1 on the right side of the first organic functional layer OF1.Figure 1 As shown in FIG. 1-2, the 1-2 auxiliary electrode AE1-2 can extend in the second direction D2 and can be opposite to the 1-1 auxiliary electrode AE1-1.

[0079] In an embodiment of the disclosure, since the 1-2 auxiliary electrode AE1-2 is patterned together with the first organic functional layer OF1, a boundary of the 1-2 auxiliary electrode AE1-2 can coincide with a boundary of the first organic functional layer OF1. For example, a side surface of the 1-2 auxiliary electrode AE1-2 can be coplanar with a side surface of the first organic functional layer OF1. In addition, the 1-2 auxiliary electrode AE1-2 can not overlap a central portion of the first organic functional layer OF1.

[0080] In an embodiment of the disclosure, the 1-2 auxiliary electrode AE1-2 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the 1-2 auxiliary electrode AE1-2 can not contact the inorganic capping layer ICL and the spacer SPC.

[0081] In an embodiment of the disclosure, the 2-1 auxiliary electrode AE2-1 and the 2-2 auxiliary electrode AE2-2 can be disposed on the second organic functional layer OF2.

[0082] In an embodiment of the disclosure, the 2-1 auxiliary electrode AE2-1 can overlap the second organic functional layer OF2 and can overlap one side of the second organic functional layer OF2. For example, as shown in FIG. 2-1, the 2-1 auxiliary electrode AE2-1 can overlap the second organic functional layer OF2 on one side of the second organic functional layer OF2. Figure 1 As shown in FIG. 2-1, the 2-1 auxiliary electrode AE2-1 can extend in the second direction D2.

[0083] In an embodiment of the disclosure, since the 2-1 auxiliary electrode AE2-1 is patterned together with the second organic functional layer OF2, a boundary of the 2-1 auxiliary electrode AE2-1 can coincide with a boundary of the second organic functional layer OF2. For example, a side surface of the 2-1 auxiliary electrode AE2-1 can be coplanar with a side surface of the second organic functional layer OF2. In addition, the 2-1 auxiliary electrode AE2-1 can not overlap a central portion of the second organic functional layer OF2.

[0084] In an embodiment of the disclosure, the 2-1 auxiliary electrode AE2-1 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the 2-1 auxiliary electrode AE2-1 can not contact the inorganic capping layer ICL and the spacer SPC.

[0085] In an embodiment of the disclosure, the 2-2 auxiliary electrode AE2-2 can overlap the second organic functional layer OF2 and can overlap another side of the second organic functional layer OF2 opposite to the one side. For example, as shown in FIG. 2-2, the 2-2 auxiliary electrode AE2-2 can overlap the second organic functional layer OF2 on the other side of the second organic functional layer OF2. Figure 1As shown in FIG. 2-2, the 2-2 auxiliary electrode AE2-2 can extend in the second direction D2 and can be opposite the 2-1 auxiliary electrode AE2-1.

[0086] In an embodiment of the disclosure, since the 2-2 auxiliary electrode AE2-2 is patterned together with the second organic functional layer OF2, a boundary of the 2-2 auxiliary electrode AE2-2 can coincide with a boundary of the second organic functional layer OF2. For example, a side surface of the 2-2 auxiliary electrode AE2-2 can be coplanar with a side surface of the second organic functional layer OF2. In addition, the 2-2 auxiliary electrode AE2-2 can not overlap a central portion of the second organic functional layer OF2.

[0087] In an embodiment of the disclosure, the 2-2 auxiliary electrode AE2-2 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the 2-2 auxiliary electrode AE2-2 can not contact the inorganic capping layer ICL and the spacer SPC.

[0088] In an embodiment of the disclosure, the 3-1 auxiliary electrode AE3-1 and the 3-2 auxiliary electrode AE3-2 can be disposed on the third organic functional layer OF3.

[0089] In an embodiment of the disclosure, the 3-1 auxiliary electrode AE3-1 can overlap the third organic functional layer OF3 and can overlap one side of the third organic functional layer OF3. For example, as shown in FIG. 3-1, the 3-1 auxiliary electrode AE3-1 can overlap the third organic functional layer OF3 on one side of the third organic functional layer OF3. Figure 1 As shown in FIG. 3-1, the 3-1 auxiliary electrode AE3-1 can extend in the second direction D2.

[0090] In an embodiment of the disclosure, since the 3-1 auxiliary electrode AE3-1 is patterned together with the third organic functional layer OF3, a boundary of the 3-1 auxiliary electrode AE3-1 can coincide with a boundary of the third organic functional layer OF3. For example, a side surface of the 3-1 auxiliary electrode AE3-1 can be coplanar with a side surface of the third organic functional layer OF3. In addition, the 3-1 auxiliary electrode AE3-1 can not overlap a central portion of the third organic functional layer OF3.

[0091] In an embodiment of the disclosure, the 3-1 auxiliary electrode AE3-1 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the 3-1 auxiliary electrode AE3-1 can not contact the inorganic capping layer ICL and the spacer SPC.

[0092] In an embodiment of the disclosure, the 3-2 auxiliary electrode AE3-2 can overlap the third organic functional layer OF3 and can overlap another side of the third organic functional layer OF3 opposite the one side. For example, as shown in FIG. 3-2, the 3-2 auxiliary electrode AE3-2 can overlap the third organic functional layer OF3 on the other side of the third organic functional layer OF3. Figure 1 As shown in FIG. 3-2, the 3-2 auxiliary electrode AE3-2 can extend in the second direction D2 and can be opposite the 3-1 auxiliary electrode AE3-1.

[0093] In the embodiments of this disclosure, since the 3-2 auxiliary electrode AE3-2 is patterned together with the third organic functional layer OF3, the boundary of the 3-2 auxiliary electrode AE3-2 can coincide with the boundary of the third organic functional layer OF3. For example, the side surface of the 3-2 auxiliary electrode AE3-2 can be coplanar with the side surface of the third organic functional layer OF3. Furthermore, the 3-2 auxiliary electrode AE3-2 may not overlap with the central portion of the third organic functional layer OF3.

[0094] In embodiments of this disclosure, the 3-2 auxiliary electrode AE3-2 may be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the 3-2 auxiliary electrode AE3-2 may not contact the inorganic capping layer ICL and the spacer SPC.

[0095] In the embodiments of this disclosure, auxiliary electrodes AE1-1 (1-1), AE1-2 (1-2), AE2-1 (2-1), AE2-2 (2-2), AE3-1 (3-1), and AE3-2 (3-2) can be formed of metals, alloys, conductive metal oxides, transparent conductive materials, etc. Each of auxiliary electrodes AE1-1 (1-1), AE1-2 (1-2), AE2-1 (2-1), AE2-2 (2-2), AE3-1 (3-1), and AE3-2 (3-2) can include, for example, silver (Ag), silver-containing alloys, molybdenum (Mo), molybdenum-containing alloys, aluminum (Al), aluminum-containing alloys, or aluminum nitride (Al). x N y ), tungsten (W), tungsten nitride (W) x N y ), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (Cr x N y It contains at least one of titanium (Ti), tantalum (Ta), platinum (Pt), scandium (Sc), indium tin oxide (ITO), and indium zinc oxide (IZO). These materials can be used alone or in combination with each other.

[0096] In the embodiments of this disclosure, auxiliary electrode AE1-1, auxiliary electrode AE1-2, auxiliary electrode AE2-1, auxiliary electrode AE2-2, auxiliary electrode AE3-1, and auxiliary electrode AE3-2 can be formed from materials such as Al, Ag, Ti, and Mo that can undergo thermal evaporation processes.

[0097] In the embodiments of this disclosure, the thickness of each of the auxiliary electrodes 1-1 AE1-1, 1-2 AE1-2, 2-1 AE2-1, 2-2 AE2-2, 3-1 AE3-1, and 3-2 AE3-2 can be approximately

[0098] A common electrode CE can be disposed on the first to third organic functional layers OF1, OF2, and OF3, as well as the aforementioned auxiliary electrodes. In embodiments of this disclosure, the common electrode CE can cover the first to third organic functional layers OF1, OF2, and OF3. Furthermore, the common electrode CE can cover auxiliary electrodes AE1-1 (1-1), AE1-2 (1-2), AE2-1 (2-1), AE2-2 (2-2), AE3-1 (3-1), and AE3-2 (3-2).

[0099] In embodiments of this disclosure, the 1-1 auxiliary electrode AE1-1 may further contact the common electrode CE. In other words, the 1-1 auxiliary electrode AE1-1 may be located between the first organic functional layer OF1 and the common electrode CE.

[0100] Additionally, auxiliary electrode AE1-2 (1-2) can be located between the first organic functional layer OF1 and the common electrode CE. Auxiliary electrode AE2-1 (2-1) can be located between the second organic functional layer OF2 and the common electrode CE. Auxiliary electrode AE2-2 (2-2) can be formed between the second organic functional layer OF2 and the common electrode CE. Auxiliary electrode AE3-1 (3-1) can be located between the third organic functional layer OF3 and the common electrode CE. Auxiliary electrode AE3-2 (3-2) can be located between the third organic functional layer OF3 and the common electrode CE.

[0101] In embodiments of this disclosure, the common electrode CE can be formed of metals, alloys, conductive metal oxides, transparent conductive materials, etc. Examples of materials that can be used as the common electrode CE include silver (Ag), silver-containing alloys, molybdenum (Mo), molybdenum-containing alloys, aluminum (Al), aluminum-containing alloys, and aluminum nitride (Al). x N y ), tungsten (W), tungsten nitride (W) x N y ), copper (Cu), nickel (Ni), chromium (Cr), chromium nitride (Cr x N y Materials include titanium (Ti), tantalum (Ta), platinum (Pt), scandium (Sc), indium tin oxide (ITO), and indium zinc oxide (IZO). These materials can be used individually or in combination.

[0102] In an embodiment of the disclosure, the common electrode CE can be formed of Ag, Ag including Yb, or an Ag alloy such as AgMg.

[0103] In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1, the 1-2 auxiliary electrode AE1-2, the 2-1 auxiliary electrode AE2-1, the 2-2 auxiliary electrode AE2-2, the 3-1 auxiliary electrode AE3-1, and the 3-2 auxiliary electrode AE3-2 can include the same material as each other.

[0104] In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1 can include the same material as that of the common electrode CE. In an embodiment of the disclosure, the 1-1 auxiliary electrode AE1-1 can include a different material from that of the common electrode CE.

[0105] Referring to Figure 6 The first to third pixel electrodes PE1, PE2, and PE3 can be formed on the via insulating layer VIA. The first to third pixel electrodes PE1, PE2, and PE3 can be spaced apart from each other and can be formed at the same time.

[0106] Referring to Figure 7 The first organic functional material layer OFM1 can be formed on the first to third pixel electrodes PE1, PE2, and PE3, and the first auxiliary electrode material layer AEM1 can be formed on the first organic functional material layer OFM1. In an embodiment of the disclosure, the first organic functional material layer OFM1 can be completely deposited to cover the first to third pixel electrodes PE1, PE2, and PE3. In an embodiment of the disclosure, the first auxiliary electrode material layer AEM1 can be completely deposited to cover the first organic functional material layer OFM1.

[0107] Referring to Figure 8 The photoresist PR can be coated on the first auxiliary electrode material layer AEM1. The photoresist PR can include a photosensitive organic material.

[0108] Referring to Figure 9 The first mask MK1 can be disposed on the photoresist PR. In an embodiment of the disclosure, the first mask MK1 can have a pattern overlapping at least a portion of the first pixel electrode PE1.

[0109] Referring to Figure 10 The photoresist PR can be patterned according to the pattern of the first mask MK1. Accordingly, the photoresist PR overlapping a portion of the first pixel electrode PE1 can be left.

[0110] Referring to Figure 11The first organic functional material layer OFM1 and the first auxiliary electrode material layer AEM1 can be patterned together according to the photoresist PR. Accordingly, the first organic functional layer OF1 and the preliminary first auxiliary electrode layer AEL1’ can be formed together.

[0111] Referring to Figure 12 The photoresist PR can be removed. The preliminary first auxiliary electrode layer AEL1’ can protect the first organic functional layer OF1 when the first organic functional layer OF1 is formed.

[0112] Referring to Figure 13 A second organic functional material layer OFM2 can be formed on the first organic functional layer OF1, the preliminary first auxiliary electrode layer AEL1’, the second pixel electrode PE2, and the third pixel electrode PE3, and a second auxiliary electrode material layer AEM2 can be formed on the second organic functional material layer OFM2. In an embodiment of the disclosure, the second organic functional material layer OFM2 can be completely deposited to cover the first organic functional layer OF1, the preliminary first auxiliary electrode layer AEL1’, the second pixel electrode PE2, and the third pixel electrode PE3. In an embodiment of the disclosure, the second auxiliary electrode material layer AEM2 can be completely deposited to cover the second organic functional material layer OFM2.

[0113] Referring to Figure 14 A photoresist PR can be coated on the second auxiliary electrode material layer AEM2. The photoresist PR can include a photosensitive organic material.

[0114] Referring to Figure 15 A second mask MK2 can be disposed on the photoresist PR. In an embodiment of the disclosure, the second mask MK2 can have a pattern overlapping at least a portion of the second pixel electrode PE2.

[0115] Referring to Figure 16 The photoresist PR can be patterned according to the pattern of the second mask MK2. Accordingly, the photoresist PR overlapping a portion of the second pixel electrode PE2 can be left.

[0116] Referring to Figure 17 The second organic functional material layer OFM2 and the second auxiliary electrode material layer AEM2 can be patterned together according to the photoresist PR. Accordingly, the second organic functional layer OF2 and the preliminary second auxiliary electrode layer AEL2’ can be formed together.

[0117] Referring to Figure 18 The photoresist PR can be removed. The preliminary second auxiliary electrode layer AEL2’ can protect the second organic functional layer OF2 when the second organic functional layer OF2 is formed.

[0118] Referring toFigure 19 A third organic functional material layer OFM3 can be formed on the first organic functional layer OF1, the preliminary first auxiliary electrode layer AEL1', the second organic functional layer OF2, the preliminary second auxiliary electrode layer AEL2', and the third pixel electrode PE3, and a third auxiliary electrode material layer AEM3 can be formed on the third organic functional material layer OFM3. In an embodiment of the disclosure, the third organic functional material layer OFM3 can be completely deposited to cover the first organic functional layer OF1, the preliminary first auxiliary electrode layer AEL1', the second organic functional layer OF2, the preliminary second auxiliary electrode layer AEL2', and the third pixel electrode PE3. In an embodiment of the disclosure, the third auxiliary electrode material layer AEM3 can be completely deposited to cover the third organic functional material layer OFM3.

[0119] Referring to Figure 20 A photoresist PR can be coated on the third auxiliary electrode material layer AEM3. The photoresist PR can include a photosensitive organic material.

[0120] Referring to Figure 21 A third mask MK3 can be disposed on the photoresist PR. In an embodiment of the disclosure, the third mask MK3 can have a pattern overlapping at least a portion of the third pixel electrode PE3.

[0121] Referring to Figure 22 The photoresist PR can be patterned according to the pattern of the third mask MK3. Accordingly, the photoresist PR overlapping a portion of the third pixel electrode PE3 can be left.

[0122] Referring to Figure 23 The third organic functional material layer OFM3 and the third auxiliary electrode material layer AEM3 can be patterned together according to the photoresist PR. Accordingly, the third organic functional layer OF3 and the preliminary third auxiliary electrode layer AEL3' can be formed together.

[0123] Referring to Figure 24 The photoresist PR can be removed. The preliminary third auxiliary electrode layer AEL3' can protect the third organic functional layer OF3 when the third organic functional layer OF3 is formed.

[0124] Referring to Figure 25The preliminary inorganic capping layer ICL' can be formed on the preliminary first auxiliary electrode layer AEL1', the preliminary second auxiliary electrode layer AEL2', and the preliminary third auxiliary electrode layer AEL3'. In an embodiment of the disclosure, the preliminary inorganic capping layer ICL' can cover the preliminary first auxiliary electrode layer AEL1', the preliminary second auxiliary electrode layer AEL2', and the preliminary third auxiliary electrode layer AEL3', and can contact the preliminary first auxiliary electrode layer AEL1', the preliminary second auxiliary electrode layer AEL2', and the preliminary third auxiliary electrode layer AEL3'. In addition, the preliminary inorganic capping layer ICL' can cover the exposed portions of the first to third organic functional layers OF1, OF2, and OF3, the exposed portions of the first to third pixel electrodes PE1, PE2, and PE3, and the exposed portion of the via insulation layer VIA. In an embodiment of the disclosure, the preliminary inorganic capping layer ICL' can contact the exposed portions of the first to third organic functional layers OF1, OF2, and OF3, the exposed portions of the first to third pixel electrodes PE1, PE2, and PE3, and the exposed portion of the via insulation layer VIA.

[0125] Referring to Figure 26 The photoresist PR can be coated on the preliminary inorganic capping layer ICL'. The photoresist PR can include a photosensitive organic material. In an embodiment of the disclosure, the photoresist PR can expose a portion of the preliminary inorganic capping layer ICL' overlapping with the center portion of the first organic functional layer OF1, the center portion of the second organic functional layer OF2, and the center portion of the third organic functional layer OF3.

[0126] Referring to Figure 27 The first etching process can be performed. For example, the first etching process can be a dry etching process.

[0127] Through the first etching process, a portion of the preliminary inorganic capping layer ICL' overlapping with the center portion of the first organic functional layer OF1 can be removed. In addition, through the first etching process, a portion of the preliminary first auxiliary electrode layer AEL1' overlapping with the center portion of the first organic functional layer OF1 can be removed. Accordingly, the first auxiliary electrode layer AEL1 can be formed. A thickness of a portion of the first auxiliary electrode layer AEL1 overlapping with the center portion of the first organic functional layer OF1 can be less than a thickness of a portion of the first auxiliary electrode layer AEL1 overlapping with a side surface of the first organic functional layer OF1.

[0128] By the first etching process, a portion of the preliminary inorganic capping layer ICL' overlapping with a central portion of the second organic functional layer OF2 can be removed. Also, by the first etching process, a portion of the preliminary second auxiliary electrode layer AEL2' overlapping with the central portion of the second organic functional layer OF2 can be removed. Accordingly, the second auxiliary electrode layer AEL2 can be formed. A thickness of the portion of the second auxiliary electrode layer AEL2 overlapping with the central portion of the second organic functional layer OF2 can be less than a thickness of a portion of the second auxiliary electrode layer AEL2 overlapping with a side of the second organic functional layer OF2.

[0129] By the first etching process, a portion of the preliminary inorganic capping layer ICL' overlapping with a central portion of the third organic functional layer OF3 can be removed. Also, by the first etching process, a portion of the preliminary third auxiliary electrode layer AEL3' overlapping with the central portion of the third organic functional layer OF3 can be removed. Accordingly, the third auxiliary electrode layer AEL3 can be formed. A thickness of the portion of the third auxiliary electrode layer AEL3 overlapping with the central portion of the third organic functional layer OF3 can be less than a thickness of a portion of the third auxiliary electrode layer AEL3 overlapping with a side of the third organic functional layer OF3.

[0130] Referring to Figure 28 The photoresist PR can be removed by the ashing process and the stripping process.

[0131] Referring to Figure 29 The preliminary spacers SPC' can be formed. In an embodiment of the disclosure, the preliminary spacers SPC' can cover the preliminary inorganic capping layer ICL', the first auxiliary electrode layer AEL1, the second auxiliary electrode layer AEL2, and the third auxiliary electrode layer AEL3.

[0132] Referring to Figure 30 The second etching process can be performed. For example, the second etching process can be a dry etching process.

[0133] By the second etching process, the preliminary inorganic capping layer ICL' overlapping with a side of the first auxiliary electrode layer AEL1 can be removed. Also, by the second etching process, a portion of the first auxiliary electrode layer AEL1 overlapping with a central portion of the first organic functional layer OF1 can be removed. Accordingly, the preliminary first auxiliary electrode AE1' can be formed. A thickness of the preliminary first auxiliary electrode AE1' overlapping with the central portion of the first organic functional layer OF1 can be less than a thickness of the preliminary first auxiliary electrode AE1' overlapping with a side of the first organic functional layer OF1.

[0134] Through the second etching process, the preliminary inorganic capping layer ICL' overlapping with the side surface of the second auxiliary electrode layer AEL2 can be removed. Also, through the second etching process, a portion of the second auxiliary electrode layer AEL2 overlapping with the central portion of the second organic functional layer OF2 can be removed. Accordingly, a preliminary second auxiliary electrode AE2' can be formed. The thickness of the preliminary second auxiliary electrode AE2' overlapping with the central portion of the second organic functional layer OF2 can be less than the thickness of the preliminary second auxiliary electrode AE2' overlapping with the side surface of the second organic functional layer OF2.

[0135] Through the second etching process, the preliminary inorganic capping layer ICL' overlapping with the side surface of the third auxiliary electrode layer AEL3 can be removed. Also, through the second etching process, a portion of the third auxiliary electrode layer AEL3 overlapping with the central portion of the third organic functional layer OF3 can be removed. Accordingly, a preliminary third auxiliary electrode AE3' can be formed. The thickness of the preliminary third auxiliary electrode AE3' overlapping with the central portion of the third organic functional layer OF3 can be less than the thickness of the preliminary third auxiliary electrode AE3' overlapping with the side surface of the third organic functional layer OF3.

[0136] In an embodiment of the disclosure, each of the first to third auxiliary electrode layers AEL1, AEL2, and AEL3 can have a dual-layer structure having different etching selectivity. Accordingly, through the second etching process, portions of the first to third auxiliary electrode layers AEL1, AEL2, and AEL3 respectively overlapping with the central portions of the first to third organic functional layers OF1, OF2, and OF3 can be preserved.

[0137] Also, through the second etching process, a portion of the preliminary spacer SPC' can be removed.

[0138] Reference Figure 31 A third etching process can be performed. For example, the third etching process can be a wet etching process.

[0139] Through the third etching process, a portion of the preliminary first auxiliary electrode AE1' overlapping with the central portion of the first organic functional layer OF1 can be removed. Accordingly, a 1-1 auxiliary electrode AE1-1 overlapping with one side of the first organic functional layer OF1 and a 1-2 auxiliary electrode AE1-2 overlapping with the other side of the first organic functional layer OF1 can be formed.

[0140] Through the third etching process, a portion of the preliminary second auxiliary electrode AE2' overlapping with the central portion of the second organic functional layer OF2 can be removed. Accordingly, a 2-1 auxiliary electrode AE2-1 overlapping with one side of the second organic functional layer OF2 and a 2-2 auxiliary electrode AE2-2 overlapping with the other side of the second organic functional layer OF2 can be formed.

[0141] Through the third etching process, a portion of the third auxiliary electrode AE3' overlapping with a central portion of the third organic functional layer OF3 can be removed. Accordingly, a 3-1 auxiliary electrode AE3-1 overlapping with one side of the third organic functional layer OF3 and a 3-2 auxiliary electrode AE3-2 overlapping with the other side of the third organic functional layer OF3 can be formed.

[0142] In addition, through the third etching process, a portion of the spacer SPC' can be removed. Accordingly, the spacer SPC can be formed.

[0143] Reference Figure 32 The common electrode CE can be formed. As described above, the common electrode CE can cover the first to third organic functional layers OF1, OF2, and OF3. In addition, the common electrode CE can cover the 1-1 auxiliary electrode AE1-1, the 1-2 auxiliary electrode AE1-2, the 2-1 auxiliary electrode AE2-1, the 2-2 auxiliary electrode AE2-2, the 3-1 auxiliary electrode AE3-1, and the 3-2 auxiliary electrode AE3-2.

[0144] The display device 1000 according to an embodiment of the disclosure can include a pixel electrode, an organic functional layer, a common electrode, and an auxiliary electrode. For example, the display device 1000 can include a first pixel electrode PE1, a first organic functional layer OF1, a common electrode CE, a 1-1 auxiliary electrode AE1-1, and a 1-2 auxiliary electrode AE1-2. The 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 can be disposed between the first organic functional layer OF1 and the common electrode CE. Since the 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 contact the common electrode CE in a display area of the display device 1000, a voltage drop (IR-drop) defect of the common electrode CE can be prevented.

[0145] In a method of manufacturing the display device 1000, the 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 can protect the first organic functional layer OF1. In addition, since the 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 are patterned together with the first organic functional layer OF1, a boundary of the 1-1 auxiliary electrode AE1-1 can coincide with a boundary of the first organic functional layer OF1, and a boundary of the 1-2 auxiliary electrode AE1-2 can coincide with the boundary of the first organic functional layer OF1. In addition, since the 1-1 auxiliary electrode AE1-1 and the 1-2 auxiliary electrode AE1-2 are patterned together with the first organic functional layer OF1, an additional process for manufacturing the display device 1000 can not be added.

[0146] Figure 33is a plan view illustrating a display device according to an embodiment of the disclosure. Figure 34 is a cross-sectional view illustrating an emission layer included in the display device of Figure 33 . For example, Figure 34 is a cross-sectional view taken along line II-II' of Figure 33 .

[0147] Referring to Figure 33 , the display device 2000 according to an embodiment of the disclosure can include a first auxiliary electrode AE1, a second auxiliary electrode AE2, and a third auxiliary electrode AE3. However, the display device 2000 can be substantially the same as the display device 1000 except for the first auxiliary electrode AE1, the second auxiliary electrode AE2, and the third auxiliary electrode AE3.

[0148] In the display device 2000, the first auxiliary electrode AE1 can correspond to the first sub-pixel SPX1, the second auxiliary electrode AE2 can correspond to the second sub-pixel SPX2, and the third auxiliary electrode AE3 can correspond to the third sub-pixel SPX3.

[0149] Referring to Figure 34 , the first auxiliary electrode AE1 can be disposed on the first organic functional layer OF1, and the second auxiliary electrode AE2 can be disposed on the second organic functional layer OF2. Also, the third auxiliary electrode AE3 can be disposed on the third organic functional layer OF3.

[0150] In an embodiment of the disclosure, the first auxiliary electrode AE1 can overlap the first organic functional layer OF1, and can overlap one side of the first organic functional layer OF1. For example, as shown in Figure 33 , the first auxiliary electrode AE1 can extend in the second direction D2.

[0151] In an embodiment of the disclosure, the first auxiliary electrode AE1 can not overlap the other side of the first organic functional layer OF1 opposite to the one side. In other words, the first auxiliary electrode AE1 can be disposed only on the one side of the first organic functional layer OF1.

[0152] In an embodiment of the disclosure, since the first auxiliary electrode AE1 is patterned together with the first organic functional layer OF1, a boundary of the first auxiliary electrode AE1 can coincide with a boundary of the first organic functional layer OF1. For example, a side surface of the first auxiliary electrode AE1 can be coplanar with a side surface of the first organic functional layer OF1. Also, the first auxiliary electrode AE1 can not overlap a central portion of the first organic functional layer OF1.

[0153] In an embodiment of the disclosure, the first auxiliary electrode AE1 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the first auxiliary electrode AE1 can not contact the inorganic capping layer ICL and the spacer SPC.

[0154] In an embodiment of the disclosure, the second auxiliary electrode AE2 can overlap the second organic functional layer OF2, and can overlap one side of the second organic functional layer OF2. For example, as shown in FIG. 2B, the second auxiliary electrode AE2 can extend in the second direction D2. Figure 33

[0155] In an embodiment of the disclosure, the second auxiliary electrode AE2 can not overlap the other side of the second organic functional layer OF2 opposite to the one side. In other words, the second auxiliary electrode AE2 can be disposed only on one side of the second organic functional layer OF2.

[0156] In an embodiment of the disclosure, since the second auxiliary electrode AE2 is patterned together with the second organic functional layer OF2, a boundary of the second auxiliary electrode AE2 can coincide with a boundary of the second organic functional layer OF2. For example, a side surface of the second auxiliary electrode AE2 can be coplanar with a side surface of the second organic functional layer OF2. In addition, the second auxiliary electrode AE2 can not overlap a central portion of the second organic functional layer OF2.

[0157] In an embodiment of the disclosure, the second auxiliary electrode AE2 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the second auxiliary electrode AE2 can not contact the inorganic capping layer ICL and the spacer SPC.

[0158] In an embodiment of the disclosure, the third auxiliary electrode AE3 can overlap the third organic functional layer OF3, and can overlap one side of the third organic functional layer OF3. For example, as shown in FIG. 2C, the third auxiliary electrode AE3 can extend in the second direction D2. Figure 33

[0159] In an embodiment of the disclosure, the third auxiliary electrode AE3 can not overlap the other side of the third organic functional layer OF3 opposite to the one side. In other words, the third auxiliary electrode AE3 can be disposed only on one side of the third organic functional layer OF3.

[0160] In an embodiment of the disclosure, since the third auxiliary electrode AE3 is patterned together with the third organic functional layer OF3, a boundary of the third auxiliary electrode AE3 can coincide with a boundary of the third organic functional layer OF3. For example, a side surface of the third auxiliary electrode AE3 can be coplanar with a side surface of the third organic functional layer OF3. In addition, the third auxiliary electrode AE3 can not overlap a central portion of the third organic functional layer OF3.

[0161] ​​In embodiments of this disclosure, the third auxiliary electrode AE3 may be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the third auxiliary electrode AE3 may not contact the inorganic capping layer ICL and the spacer SPC.

[0162] The common electrode CE can be disposed on the first to third organic functional layers OF1, OF2, and OF3, as well as the aforementioned auxiliary electrodes AE1, AE2, and AE3. In embodiments of this disclosure, the common electrode CE can cover the first to third organic functional layers OF1, OF2, and OF3. Furthermore, the common electrode CE can cover the first auxiliary electrode AE1, the second auxiliary electrode AE2, and the third auxiliary electrode AE3.

[0163] In embodiments of this disclosure, the first auxiliary electrode AE1 may contact the common electrode CE. In other words, the first auxiliary electrode AE1 may be located between the first organic functional layer OF1 and the common electrode CE. Furthermore, the second auxiliary electrode AE2 may be located between the second organic functional layer OF2 and the common electrode CE, and the third auxiliary electrode AE3 may be located between the third organic functional layer OF3 and the common electrode CE.

[0164] Figure 35 This is a plan view illustrating a display device according to an embodiment of the present disclosure. Figure 36 The illustration includes Figure 35 A cross-sectional view of the emitting layer in a display device. For example, Figure 36 It is along Figure 35 The cross-sectional view taken from line III-III'.

[0165] refer to Figure 35 The display device 3000 according to embodiments of the present disclosure may include a first auxiliary electrode AE1. However, apart from the first auxiliary electrode AE1, the display device 3000 may be substantially the same as the display device 1000 described above.

[0166] In the display device 3000, the first auxiliary electrode AE1 may correspond to the first sub-pixel SPX1.

[0167] refer to Figure 36 The first auxiliary electrode AE1 can be disposed on the first organic functional layer OF1.

[0168] In embodiments of this disclosure, the first auxiliary electrode AE1 may overlap with the first organic functional layer OF1, and may overlap with one side of the first organic functional layer OF1. For example, as Figure 35 As shown, the first auxiliary electrode AE1 can extend in the second direction D2.

[0169] In an embodiment of the disclosure, the first auxiliary electrode AE1 can not overlap with another side of the first organic functional layer OF1 opposite to the one side. In other words, the first auxiliary electrode AE1 can be disposed only at one side of the first organic functional layer OF1.

[0170] In an embodiment of the disclosure, since the first auxiliary electrode AE1 is patterned together with the first organic functional layer OF1, a boundary of the first auxiliary electrode AE1 can coincide with a boundary of the first organic functional layer OF1. For example, a side surface of the first auxiliary electrode AE1 can be coplanar with a side surface of the first organic functional layer OF1. In addition, the first auxiliary electrode AE1 can not overlap with a central portion of the first organic functional layer OF1.

[0171] In an embodiment of the disclosure, the first auxiliary electrode AE1 can be spaced apart from the inorganic capping layer ICL and the spacer SPC. In other words, the first auxiliary electrode AE1 can not contact the inorganic capping layer ICL and the spacer SPC.

[0172] The common electrode CE can be disposed on the first to third organic functional layers OF1, OF2, and OF3 and the first auxiliary electrode AE1. In an embodiment of the disclosure, the common electrode CE can cover the first to third organic functional layers OF1, OF2, and OF3. In addition, the common electrode CE can cover the first auxiliary electrode AE1.

[0173] In an embodiment of the disclosure, the first auxiliary electrode AE1 can further contact the common electrode CE. In other words, the first auxiliary electrode AE1 can be interposed between the first organic functional layer OF1 and the common electrode CE.

[0174] In an embodiment of the disclosure, the common electrode CE can cover the entire surface of the second organic functional layer OF2. For example, the common electrode CE can contact the entire surface of the second organic functional layer OF2. In other words, any auxiliary electrode can not be formed on the second organic functional layer OF2.

[0175] In an embodiment of the disclosure, the common electrode CE can cover the entire surface of the third organic functional layer OF3. For example, the common electrode CE can contact the entire surface of the third organic functional layer OF3. In other words, any auxiliary electrode can not be formed on the third organic functional layer OF3.

[0176] Although the disclosure has been described with reference to the embodiments of the disclosure, it will be understood by those of ordinary skill in the art that various changes in form and details can be made thereto without departing from the spirit and scope of the disclosure.

Claims

1. A display device comprising: a first pixel electrode provided over a substrate; a first organic functional layer provided over the first pixel electrode; a first auxiliary electrode provided over the first organic functional layer and overlapping a first side of the first organic functional layer; and a common electrode provided over the first auxiliary electrode and covering the first organic functional layer and the first auxiliary electrode. a boundary of the first auxiliary electrode is aligned with a boundary of the first organic functional layer, and 2. The display device according to claim 1, wherein wherein the first auxiliary electrode does not overlap a central portion of the first organic functional layer. the first auxiliary electrode contacts the common electrode, and 3. The display device according to claim 1, wherein wherein the first auxiliary electrode is interposed between the first organic functional layer and the common electrode. the first auxiliary electrode comprises a same material as a material of the common electrode, or 4. The display device according to claim 1, wherein wherein the first auxiliary electrode comprises a different material from a material of the common electrode.

5. The display device according to claim 1, further comprising: an inorganic capping layer covering the first organic functional layer and spaced apart from the first auxiliary electrode; and a spacer provided over the inorganic capping layer and spaced apart from the first auxiliary electrode. the first auxiliary electrode comprises: a 1-1 auxiliary electrode overlapping the first side of the first organic functional layer; and 6. The display device according to claim 1, wherein a 1-2 auxiliary electrode overlapping a second side of the first organic functional layer opposite the first side.

7. The display device according to claim 6, further comprising: a second pixel electrode provided over the substrate and spaced apart from the first pixel electrode; a second organic functional layer provided over the second pixel electrode; a 2-1 auxiliary electrode provided over the second organic functional layer and overlapping a first side of the second organic functional layer; and a 2-2 auxiliary electrode provided over the second organic functional layer and overlapping a second side of the second organic functional layer opposite the first side. the first auxiliary electrode does not overlap the second side of the first organic functional layer opposite the first side.

9. The display device according to claim 8, further comprising: a second pixel electrode provided over the substrate and spaced apart from the first pixel electrode; 8. The display device according to claim 1, wherein a second organic functional layer provided over the second pixel electrode; and a second auxiliary electrode provided over the second organic functional layer and overlapping a first side of the second organic functional layer, wherein the second auxiliary electrode does not overlap a second side of the second organic functional layer opposite the first side.

10. The display device according to claim 8, further comprising: a second pixel electrode provided over the substrate and spaced apart from the first pixel electrode; and a second organic functional layer provided over the second pixel electrode, wherein the common electrode covers an entire surface of the second organic functional layer. ​ ​ ​ ​ ​

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