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KR-20260064861-A - DISPLAY DEVICE, ELECTRONIC DEVICE, AND MANUFACTURING METHOD OF DISPLAY DEVICE

KR20260064861AKR 20260064861 AKR20260064861 AKR 20260064861AKR-20260064861-A

Abstract

A display device according to one embodiment comprises a substrate including a display area and a non-display area surrounding at least a portion of the display area, a pixel overlapping the display area, a base layer located on a first surface of the substrate, and electrode pads located below the surface of the base layer facing the substrate and overlapping the non-display area, wherein the substrate has an opening that exposes the electrode pads, and the side of the substrate defining the opening includes a plurality of concave portions.

Inventors

  • 이승민
  • 정소연
  • 황석준

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260508
Application Date
20241029

Claims (20)

  1. A substrate comprising a display area and a non-display area surrounding at least a portion of the display area, Pixels overlapping the above display area, A base layer located on a first surface of the above substrate, and It includes electrode pads located below the surface of the base layer facing the substrate and overlapping with the non-display area, The above substrate has an opening that exposes the electrode pads, A display device in which the side of the substrate defining the opening includes a plurality of concave portions.
  2. In paragraph 1, It further includes a chip-on-film comprising a driving unit that provides an electrical signal to the pixel, and A display device configured such that the electrode pads are electrically connected to the chip-on-film.
  3. In paragraph 2, A display device in which at least a portion of the above chip-on-film overlaps the above display area.
  4. In paragraph 2, The above chip-on-film includes connection pads that are electrically connected to the electrode pads, and A display device further comprising an adhesive member positioned between the above-mentioned connection pads and the above-mentioned electrode pads.
  5. In paragraph 1, A display device comprising at least one selected from the group consisting of tungsten (W), molybdenum (Mo), and chromium (Cr), the electrode pads described above.
  6. In paragraph 5, The above electrode pads each include a first metal layer and a second metal layer, and The second metal layer comprises at least one of tungsten and chromium, and The above opening is a display device that exposes the second metal layer.
  7. In paragraph 1, A display device comprising at least one selected from the group consisting of silicon nitride (SiN x ), amorphous silicon (a-Si), and silicon oxide (SiO x ) in the base layer.
  8. In Paragraph 7, A display device comprising a base layer including a first layer comprising silicon nitride, a second layer comprising amorphous silicon, and a third layer comprising silicon oxide.
  9. In paragraph 8, The above opening is a display device that exposes a part of the first layer.
  10. In paragraph 1, The above substrate further includes a second surface facing the first surface and connected to the side surface, and A display device in which the surface roughness of the above-mentioned side is higher than the surface roughness of the above-mentioned second side.
  11. In paragraph 1, A display device further comprising a flattening layer located on the base layer and overlapping with the non-display area.
  12. In Paragraph 11, A display device comprising at least one selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene, and phenolic resin, wherein the planarization layer is said to be polyimide, polyamide, acrylic resin, benzocyclobutene, and phenolic resin.
  13. In Paragraph 11, It further includes a sealing layer located above the pixel and including a portion that overlaps with the display area, and The flattening layer is a display device adjacent to the sealing layer.
  14. A step of preparing a substrate including a display area and a non-display area located around the display area, A step of forming electrode pads on a non-display area of the above substrate, Step of laminating a base layer on the above electrode pads, A step of forming pixels on a display area of the above substrate, A step of patterning an area on the lower surface of the substrate that overlaps with the electrode pads to form a groove that overlaps with the electrode pads, and A method for manufacturing a display device comprising the step of wet-etching the lower surface of the substrate including the groove to form an opening that exposes the electrode pads.
  15. In Paragraph 14, A method for manufacturing a display device in which the side of the substrate defining the opening includes a plurality of concave portions.
  16. In Paragraph 14, A method for manufacturing a display device comprising at least one selected from the group consisting of tungsten (W), molybdenum (Mo), and chromium (Cr), wherein the electrode pads are said to be.
  17. In Paragraph 14, The step of laminating the above base layer is, A step of forming a first layer comprising silicon nitride, A step of forming a second layer comprising amorphous silicon on the first layer, A method for manufacturing a display device comprising the step of forming a third layer containing silicon oxide on the second layer.
  18. In Paragraph 14, The step of forming the above groove is, A method for manufacturing a display device that uses a circular blade to form a groove that is extended in a direction in which the electrode pads are aligned and overlaps with the electrode pads.
  19. In Paragraph 18, A method for manufacturing a display device in which the depth of the groove is 0.5 to 0.6 of the thickness of the substrate.
  20. In Paragraph 14, The step of wet-etching the lower surface of the substrate to form an opening that exposes the electrode pads is: Method for manufacturing a display device using a fluorine-based etching solution.

Description

Display device, electronic device, and manufacturing method of display device The present disclosure relates to a display device, an electronic device, and a method for manufacturing a display device. With the advancement of information technology, the importance of display devices, which serve as a medium connecting users and information, is being highlighted. In response to this, the use of display devices such as Liquid Crystal Displays (LCDs) and Organic Light Emitting Displays (OLEDs) is increasing. The location of the driving unit for driving the pixels of the display device can be determined in various ways. For example, the driving unit may be placed on the back of the display device. In this case, a pad for electrically connecting the driving unit to the components of the display device may be placed on the front or back of the display device. FIG. 1 is a schematic perspective view illustrating the usage state of an electronic device according to one embodiment. FIG. 2 is an exploded perspective view of an electronic device according to one embodiment. FIG. 3 is a block diagram of an electronic device according to one embodiment. FIG. 4 is a plan view of a display device according to one embodiment. FIG. 5 is an exploded perspective view of a display device according to one embodiment. Figure 6 is a cross-sectional view taken along III-III' of Figure 1. FIG. 7 is a schematic cross-sectional view of a base layer according to one embodiment. Figure 8 is an enlarged cross-sectional view of area A of Figure 3. FIG. 9 is a cross-sectional view of a pixel layer according to one embodiment. FIGS. 10 to 15 are cross-sectional views sequentially illustrating the manufacturing process of a display device according to one embodiment. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side. Hereinafter, an electronic device according to one embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic perspective view illustrating the usage state of an electronic device according to one embodiment, FIG. 2 is an exploded perspective view of an electronic device according to one embodiment, and FIG. 3 is a block diagram of an electronic device according to one embodiment. Referring to FIG. 1, an electronic device (1000) according to one embodiment is a device for displaying video or still images and can be used as a display screen for various products such as televisions, laptops, monitors, billboards, and the Internet of Things (IOT), as well as portable electronic devices such as mobile phones, smartphones, tablet personal computers, mobile communication terminals, electronic notebooks, e-books, PMPs (portable multimedia players), navigation systems, and UMPCs (Ultra Mobile PCs). FIG. 1 illustrates the electronic device (1000) being used as a tablet PC for convenience of explanation. The electronic device (1000) can display an image toward a third direction (DR3) on a display surface parallel to each of the first direction (DR1) and the second direction (DR2). The di