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KR-102962711-B1 - Display device

KR102962711B1KR 102962711 B1KR102962711 B1KR 102962711B1KR-102962711-B1

Abstract

One embodiment of the present invention discloses a display device comprising a display area and a peripheral area outside the display area, wherein the display device comprises a pad section including a plurality of light-emitting diodes disposed in the display area, a plurality of transistors electrically connected to each of the plurality of light-emitting diodes, and a pad electrode having a multilayer structure located in the peripheral area, wherein the multilayer structure of the pad electrode comprises a main metal layer, a first conductive layer disposed on the upper surface of the main metal layer and comprising an amorphous conductive material, and an auxiliary layer disposed on the lower surface of the main metal layer.

Inventors

  • 양신혁
  • 강동한
  • 김지훈
  • 이준기
  • 허종무

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260508
Application Date
20201023

Claims (20)

  1. A display device comprising a display area and a peripheral area outside the display area, A plurality of light-emitting diodes arranged in the above display area; A plurality of transistors electrically connected to each of the plurality of light-emitting diodes; and A pad section comprising a multilayer structured pad electrode located in the above-mentioned surrounding area is provided, The multilayer structure of the above pad electrode is, Main metal layer; A first conductive layer disposed on the upper surface of the main metal layer and comprising an amorphous transparent conductive material; An auxiliary layer disposed on the lower surface of the main metal layer; and A second conductive layer interposed between the main metal layer and the first conductive layer, comprising a metal different from that of the main metal layer; The above multilayer structure is, A first metal oxide layer disposed between the main metal layer and the second conductive layer and containing the same metal element as the main metal layer, and a second metal oxide layer disposed between the second conductive layer and the first conductive layer and containing the same metal element as the second conductive layer, further comprising at least one of these. Display device.
  2. delete
  3. In paragraph 1, A display device comprising zinc indium tin oxide (ZITO), wherein the above-mentioned amorphous transparent conductive material.
  4. In paragraph 3, A display device in which the tin content of zinc indium tin oxide (ZITO) is 5 at% to 25 at% relative to the zinc and indium content.
  5. delete
  6. In paragraph 1, A display device in which the second conductive layer comprises titanium, molybdenum, or tungsten.
  7. delete
  8. In paragraph 1, A display device in which the above auxiliary layer comprises a metal layer or a transparent oxide conductive layer.
  9. In Article 1, Wiring arranged in the above surrounding area; A first insulating layer disposed between the wiring and the pad electrode and including a contact hole for electrical connection between the wiring and the pad electrode; and A display device further comprising: a second insulating layer that covers the connection area of the wiring and the pad electrode and includes a hole that overlaps the pad electrode.
  10. In Article 9, The above pad electrode is It includes an outer portion overlapping the second insulating layer, and an inner portion overlapping the hole of the second insulating layer. A display device in which the thickness of the outer part is greater than the thickness of the inner part.
  11. In Article 9, A display device in which the second insulating layer comprises an inorganic insulating material.
  12. In Article 1, Each of the above plurality of transistors is, A semiconductor layer comprising a channel region, a source region and a drain region respectively disposed on both sides of the channel region; A lower electrode disposed below the above semiconductor layer; A gate electrode disposed on the semiconductor layer and overlapping with the channel region; and It includes an electrode electrically connected to the source region or the drain region, and A display device in which the pad electrode is located on the same layer as the lower electrode, the gate electrode, or the electrode.
  13. A display device comprising a display area and a peripheral area outside the display area, A plurality of light-emitting diodes arranged in the above display area; A plurality of transistors electrically connected to each of the above plurality of light-emitting diodes; Wiring disposed in the above surrounding area; and It includes a pad electrode that overlaps with the above wiring and is electrically connected to the above wiring; The above wiring is, Main metal layer; An auxiliary layer disposed on the lower surface of the main metal layer; and A first metal oxide layer disposed on the main metal layer and containing the same metal element as the main metal layer; comprising The above pad electrode is, A first conductive layer disposed on the upper surface of the main metal layer and comprising a transparent conductive oxide; and A second conductive layer disposed between the main metal layer and the first conductive layer and comprising a material different from that of the first conductive layer; comprising Display device.
  14. In Paragraph 13, It further includes a first insulating layer located between the first metal oxide layer of the wiring and the second conductive layer of the pad electrode, and A display device in which the first insulating layer covers the edge of the pad electrode and includes a hole that overlaps the pad electrode.
  15. In Paragraph 14, The first conductive layer of the pad electrode is, A display device comprising at least one material selected from zinc indium tin oxide (ZITO), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide ( In₂O₃ ), indium gallium oxide (IGO), and aluminum zinc oxide (AZO).
  16. In paragraph 15, The main metal layer of the above wiring contains copper, A display device in which the second conductive layer of the pad electrode comprises a metal element different from the main metal layer.
  17. In Paragraph 16, A display device wherein the second conductive layer comprises at least one selected from titanium (Ti), molybdenum (Mo), and tungsten (W).
  18. delete
  19. In Paragraph 13, A display device comprising a second metal oxide layer disposed between the second conductive layer and the first conductive layer, and further comprising a second metal oxide layer containing the same metal element as the second conductive layer.
  20. In Paragraph 13, A display device further comprising a second insulating layer disposed on the first conductive layer of the pad electrode and including a hole that overlaps with the first conductive layer.

Description

Display device Embodiments of the present invention relate to a display device. A display device is a device that receives information about an image and displays the image. To receive information about an image, such a display device has pad electrodes electrically connected to display elements placed at the edges, and these pad electrodes can be electrically connected to pad electrodes of a printed circuit board or bumps of an integrated circuit. FIG. 1a is a schematic plan view of a display device according to one embodiment of the present invention. FIG. 1b is a cross-sectional view schematically showing a display device according to one embodiment of the present invention. FIG. 2 is an equivalent circuit diagram showing a light-emitting diode and a pixel circuit connected to the light-emitting diode provided in a display panel according to one embodiment of the present invention. Figure 3 is an enlarged plan view of part I of Figure 1a. FIG. 4 is a cross-sectional view of a pad electrode according to one embodiment of the present invention, corresponding to the cross-sectional view along the line III-III' of FIG. 3. Figure 5 is an enlarged cross-sectional view of section IV of Figure 4. FIG. 6 is a cross-sectional view of a pad electrode according to one embodiment of the present invention, corresponding to the cross-sectional view along the line III-III' of FIG. 3. Figure 7 is an enlarged cross-sectional view of part VI of Figure 6. FIG. 8 is a cross-sectional view of a pad electrode according to one embodiment of the present invention, corresponding to the cross-sectional view along the line III-III' of FIG. 3. FIGS. 9a to 9d are enlarged cross-sectional views of part VIII of FIG. 8. FIGS. 10a to 10e are plan views showing a pad electrode and wiring according to an embodiment of the present invention. FIG. 11 is a cross-sectional view showing a display panel according to one embodiment of the present invention. FIG. 12 is an enlarged cross-sectional view of section XI of FIG. 11. FIGS. 13 and FIGS. 14 are cross-sectional views showing a display panel according to one embodiment of the present invention. FIGS. 15 and FIGS. 16 are cross-sectional views showing a display device according to an embodiment of the present invention. FIG. 17 is a plan view showing the outer area of a display device according to one embodiment of the present invention, corresponding to part I of FIG. 1a. FIG. 18 is a cross-sectional view along the line XVII-XVII' of FIG. 17. Fig. 19 is an enlarged view of section XVIII of Fig. 18. FIG. 20 is a cross-sectional view of a pad electrode according to one embodiment of the present invention, corresponding to the cross-sectional view along the line XVII-XVII' of FIG. 17. FIG. 21 is a cross-sectional view of a pad electrode according to one embodiment of the present invention, corresponding to the cross-sectional view along the line XVII-XVII' of FIG. 17. FIG. 22 is an enlarged cross-sectional view of section XXI of FIG. 21. FIGS. 23a and FIGS. 23b are cross-sectional views of a pad electrode according to an embodiment of the present invention, and are enlarged views of portion XXI of FIG. 21. FIG. 24 is a cross-sectional view showing a display panel according to one embodiment of the present invention. FIG. 25 is a cross-sectional view showing a display device according to one embodiment of the present invention. FIG. 26a is a cross-sectional view showing the inorganic light-emitting diode of FIG. 25. FIG. 26b is a cross-sectional view showing an inorganic light-emitting diode according to another embodiment. FIG. 27 is a perspective view showing a display device according to one embodiment of the present invention. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects 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 drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following examples, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one