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KR-102962441-B1 - DISPLAY DEVICE AND METHOD OF THE SAME

KR102962441B1KR 102962441 B1KR102962441 B1KR 102962441B1KR-102962441-B1

Abstract

A display device and a method for manufacturing the same are provided. The display device comprises a first electrode and a second electrode spaced apart from each other and disposed on a substrate, a light-emitting element disposed between the first electrode and the second electrode and having a first end and a second end, an insulating layer disposed on the light-emitting element, the insulating layer having a fixing portion disposed on at least a part of the light-emitting element and a partition portion surrounding the light-emitting element, a first connecting electrode in contact with the first end of the light-emitting element, and a second connecting electrode in contact with the second end of the light-emitting element, wherein the width of the upper surface of each of the fixing portion and the partition portion may be greater than the width of the lower surface.

Inventors

  • 사카모토 요시아키

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260508
Application Date
20220221

Claims (20)

  1. A first electrode and a second electrode spaced apart from each other on a substrate; A light-emitting element disposed between the first electrode and the second electrode, having a first end and a second end; An insulating layer disposed on the light-emitting element, the insulating layer having a fixed portion disposed on at least a part of the light-emitting element and a partition portion surrounding the light-emitting element; and A first connecting electrode in contact with a first end of the light-emitting element, and a second connecting electrode in contact with a second end of the light-emitting element; and It includes a first conductive pattern disposed on the fixed part and a second conductive pattern disposed on the partition part, The width of the upper surface of each of the above fixed part and the above bulkhead part is greater than the width of the lower surface, and The first connecting electrode and the second connecting electrode are a display device spaced apart from the first conductive pattern and the second conductive pattern.
  2. In Article 1, A display device in which each of the above-mentioned fixed part and the above-mentioned partition part has an inverse taper shape in which the width from the upper surface to the lower surface decreases.
  3. In Article 1, A display device in which the first connecting electrode and the second connecting electrode are spaced apart with the fixing part in between.
  4. In Article 1, The first conductive pattern is a display device arranged to overlap with the light-emitting element on the fixed part.
  5. In Paragraph 4, A display device in which the first conductive pattern and the second conductive pattern are made of the same material as the first connecting electrode and the second connecting electrode.
  6. In Article 1, The above insulating layer is a display device comprising an organic insulating material.
  7. In Article 1, A first insulating layer disposed between the first electrode and the second electrode and the light-emitting element; and It further includes a first contact portion and a second contact portion that penetrate the first insulating layer and expose the upper surfaces of the first electrode and the second electrode, and A display device in which the first electrode and the first connecting electrode are connected through the first contact portion, and the second electrode and the second connecting electrode are connected through the second contact portion.
  8. In Article 7, A display device in which the thickness of the first insulating layer is smaller than the thickness of the insulating layer.
  9. In Article 1, The insulating layer includes a first opening that exposes a first end of the light-emitting element and a second opening that exposes a second end, and A display device in which the first connecting electrode is disposed within the first opening and the second connecting electrode is disposed within the second opening.
  10. In Article 1, A display device in which the fixed part and the bulkhead part are integrated, and the fixed part is positioned across the bulkhead part.
  11. In Article 1, A display device in which the fixed part and the bulkhead part are physically separated, and the inner diameter of the bulkhead part is larger than the outer diameter of the fixed part.
  12. A first electrode and a second electrode spaced apart from each other within a subpixel; Light-emitting elements disposed between the first electrode and the second electrode, having a first end and a second end; An insulating layer disposed on the light-emitting elements, the insulating layer having a fixed portion disposed on at least a portion of the light-emitting elements, a partition portion surrounding the subpixel, and openings disposed between the fixed portion and the partition portion; A first conductive pattern disposed on the fixed part and a second conductive pattern disposed on the partition part; and It includes a first connecting electrode in contact with a first end of the light-emitting element, and a second connecting electrode in contact with a second end of the light-emitting element. Each of the first connecting electrode and the second connecting electrode is disposed within the openings, The first connecting electrode and the second connecting electrode are a display device spaced apart from the first conductive pattern and the second conductive pattern.
  13. In Article 12, The above-mentioned fixed part extends in a second direction that intersects the first direction, which is the length direction of the light-emitting element, and The above partition is a display device extending in the first direction and the second direction.
  14. In Article 12, It further includes a bank layer extending in a first direction and a second direction intersecting the first direction, and surrounding the subpixel, and The above insulating layer is a display device disposed on the above bank layer.
  15. In Article 14, A display device in which the width of the first direction of the above bulkhead is greater than the width of the first direction of the above bank layer.
  16. In Article 12, The above opening is a display device that exposes the first and second ends of the light-emitting element.
  17. In Article 12, The above subpixel includes a first subpixel and a second subpixel adjacent to one direction of the first subpixel, and A display device in which the second connecting electrode of the first subpixel and the third connecting electrode of the second subpixel are spaced apart with the partition between them.
  18. A step of aligning a light-emitting element between a first electrode and a second electrode spaced apart on a substrate; A step of etching an insulating material layer formed on the light-emitting element to form a first opening that exposes a first end of the light-emitting element and a second opening that exposes a second end; and The method includes the step of forming a first connecting electrode in contact with a first end of the light-emitting element within the first opening, and a second connecting electrode in contact with a second end of the light-emitting element within the second opening. In the step of etching the insulating material layer, a fixing part disposed on at least a portion of the light-emitting element and a partition part surrounding the light-emitting element are formed such that the width of the upper surface is greater than the width of the lower surface, and the fixing part and the partition part are formed. In the step of forming the first connecting electrode and the second connecting electrode, a first conductive pattern disposed on the fixed part and a second conductive pattern disposed on the partition part are formed. A method for manufacturing a display device in which the first connecting electrode and the second connecting electrode are spaced apart from the first conductive pattern and the second conductive pattern.
  19. delete
  20. In Article 18, A method for manufacturing a display device in which the first connecting electrode, the second connecting electrode, and the conductive pattern are formed simultaneously.

Description

Display device and method of manufacturing the same The present invention relates to a display device and a method for manufacturing the same. As the information society develops, the demand for display devices for displaying images is increasing in various forms. The display device may be a flat panel display device such as a Liquid Crystal Display, a Field Emission Display, or a Light Emitting Display. The light emitting display device may include an organic light emitting display device comprising an organic light emitting diode as a light emitting element, an inorganic light emitting display device comprising an inorganic semiconductor as a light emitting element, or a micro light emitting diode (or micro light emitting diode) as a light emitting element. FIG. 1 is a schematic plan view of a display device according to one embodiment. FIG. 2 is a plan view showing one pixel of a display device according to one embodiment. FIG. 3 is a plan view showing the arrangement of electrodes, light-emitting elements, a bank layer, and a second insulating layer placed in one pixel of FIG. 2. Figure 4 is a cross-sectional view taken along the line E1-E1' of Figures 2 and 3. Figure 5 is a cross-sectional view taken along the line E2-E2' of Figures 2 and 3. FIG. 6 is a schematic diagram of a light-emitting element according to one embodiment. Figure 7 is an enlarged cross-sectional view of A in Figure 4. FIG. 8 is an example of a cross-sectional view of E1-E1' of FIG. 2 and FIG. 3 according to another embodiment. FIG. 9 is another example of a cross-sectional view of E1-E1' of FIG. 2 and FIG. 3 according to another embodiment. FIGS. 10 to 16 are cross-sectional and plan views by process to explain a method for manufacturing a display device according to one embodiment. FIG. 17 is a plan view showing one subpixel of a display device according to another embodiment. FIG. 18 is a plan view showing the arrangement of electrodes, light-emitting elements, and a second insulating layer placed in one subpixel of FIG. 17. Figure 19 is a cross-sectional view taken along the line E3-E3' of Figures 17 and 18. FIG. 20 is a plan view showing one subpixel of a display device according to another embodiment. FIG. 21 is a plan view showing the arrangement of electrodes, light-emitting elements, a bank layer, and a second insulating layer placed in one subpixel of FIG. 20. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. When elements or layers are referred to as being "on" another element or layer, this includes cases where another layer or element is interposed directly on or in the middle of another element. Throughout the specification, the same reference numerals refer to the same components. Shapes, sizes, ratios, angles, numbers, etc., disclosed in the drawings for describing embodiments are exemplary and therefore the invention is not limited to the depicted details. Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be the second component within the technical scope of the present invention. The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship. Specific embodiments will be described below with reference to the attached drawings. FIG. 1 is a schematic plan view of a display device according to one embodiment. Referring to FIG. 1, the display device (10) displays a video or a still image. The display device (10) may refer to any electronic device that provides a display screen. For example, a television, laptop, monitor, billboard, Internet of Things, mobile phone, smartphone, tablet PC (Personal Computer), electronic watch, smart watch, watch phone, head-mounted display, mobile communication terminal, electronic notebook, electronic book, PMP (Portable Multimedia Player), navigation, game console, digital camera, camcorder, etc. that provide a display screen may be included in the display device (10). The display device (10) includes a display panel that pro