Adsorption device and transferring system having same

{
  "publication_number": "US11139187B2",
  "country": "US",
  "kind": "B2",
  "title": "Adsorption device and transferring system having same",
  "abstract": "An adsorption device includes a substrate, a plurality of magnetic films, and a plurality of magnets. The substrate defines a plurality of receiving grooves spaced apart from each other. Each receiving groove defines a bottom wall and a side wall. Each magnetic film is in one receiving groove and covers the bottom wall and the side wall. The magnetic films are made of magnetic material. Each magnet is in one receiving groove. Each magnetic film is between the substrate and one magnet, a large number of magnetized LEDs of very small size are attracted on a one-to-one basis to the receiving grooves for transfer and placement of the LEDs onto a display panel which is in the course of being manufactured.",
  "claims": [
    "1. An adsorption device configured to adsorb light emitting diodes, comprising: a substrate, the substrate defining a plurality of receiving grooves spaced apart from each other, each of the receiving grooves defining a bottom wall and a side wall coupling the bottom wall; a plurality of magnetic films having a same thickness, each of the plurality of magnetic film being in one of the plurality of receiving grooves and covering the bottom wall and the side wall, the plurality of magnetic films being made of magnetic material; and a plurality of magnets each including a bottom surface facing the bottom wall, a top surface opposite to the bottom surface, and a side surface coupling between the bottom surface and the top surface, each of the plurality of magnets being in one of the plurality of receiving grooves, each of the plurality of magnetic films being between the substrate and a corresponding one of the plurality of magnets.",
    "2. The adsorption device of claim 1, wherein a side of each of the plurality of magnets adjacent to the bottom wall and a top side of each of the plurality of magnets away from the bottom wall form opposite magnetic poles.",
    "3. The adsorption device of claim 1, further comprising a protective film, wherein the protective film covers the plurality of receiving grooves.",
    "4. The adsorption device of claim 3, wherein the protective film is made of resin.",
    "5. The adsorption device of claim 1, wherein the magnetic film is made of a ferromagnetic material or a ferrimagnetic material.",
    "6. The adsorption device of claim 5, wherein the magnetic film is made of one or more selected from a group consisted of iron, cobalt, and nickel.",
    "7. The adsorption device of claim 1, wherein each of the plurality of magnets is composed of magnetic powder.",
    "8. A transferring system, comprising: an adsorption device configured to adsorb light emitting diodes, the adsorption device comprising: a substrate, the substrate defining a plurality of receiving grooves spaced apart from each other, each of the receiving grooves defining a bottom wall and a side wall coupling the bottom wall; a plurality of magnetic films having a same thickness, each of the plurality of magnetic film being in one of the plurality of receiving grooves and covering the bottom wall and the side wall, the plurality of magnetic films being made of magnetic material; and a plurality of magnets each including a bottom surface facing the bottom wall, a top surface opposite to the bottom surface, and a side surface coupling between the bottom surface and the top surface, each of the plurality of magnets being in one of the plurality of receiving grooves, each of the plurality of magnetic film being between the substrate and one of the plurality of magnets; a target substrate, a plurality of spots of anisotropic conductive adhesive being on the target substrate and configured to fix the light emitting diodes on the target substrate from the adsorption device.",
    "9. The transferring system of claim 8, wherein a side of each of the plurality of magnets adjacent to the bottom wall and a top side of each of the plurality of magnets away from the bottom wall form opposite magnetic poles.",
    "10. The transferring system of claim 8, further comprising a protective film, wherein the protective film covers the plurality of receiving grooves.",
    "11. The transferring system of claim 10, wherein the protective film is made of resin.",
    "12. The transferring system of claim 8, wherein the magnetic film is made of a ferromagnetic material or a ferrimagnetic material.",
    "13. The transferring system of claim 12, wherein the magnetic film is made of one or more selected from a group consisted of iron, cobalt, and nickel.",
    "14. The transferring system of claim 8, wherein each of the plurality of magnets is composed of magnetic powder."
  ],
  "description_excerpt": "The subject matter herein generally relates to a field of manufacturing display panels, and particularly relates to an adsorption device, a method for making the adsorption device, and a transferring system having the adsorption device.\n\nIn a manufacturing process of a micro light emitting diode (LED) display device, a large number of LEDs are transferred to a substrate having a circuit. A known method of transferring is to adopt electrostatic attraction, that is, the LEDs to be transferred are held to a transferring substrate by static electricity, then the transferring substrate with the LEDs is moved above the substrate, and the static electricity is removed to make the LEDs drop onto the substrate. However, the electrostatic charge may damage the circuit on the substrate.\n\nTherefore, there is room for improvement in the art.\n\nImplementations of the present technology will now be described, by way of embodiments only, with reference to the attached figures.\n\nFIG. 1 is a cross-sectional view of an adsorption device according to an embodiment of the present disclosure.\n\nFIG. 2 is a flowchart showing a method for making the adsorption device.\n\nFIG. 3 is a cross-sectional view illustrating a step S 1 of the method for making the adsorption device in FIG. 2.\n\nFIG. 4 is a cross-sectional view illustrating a step S 2 of the method for making the adsorption device in FIG. 2.\n\nFIG. 5 is another embodiment of a cross-sectional view illustrating a step S 2 of the method for making the adsorption device in FIG. 2.",
  "cpc": [
    "H10P 72/165",
    "B65G 47/92",
    "H01F 41/0253",
    "H01F 7/02",
    "H01F 7/021",
    "H01F 7/0247",
    "H01F 7/0257",
    "H01L 21/67336",
    "H01L 33/00",
    "H10H 20/01",
    "H10H 20/80",
    "H10H 20/857",
    "H10P 72/3204",
    "H10P 72/72",
    "H10P 72/722",
    "H10W 72/0198",
    "H10W 72/0711",
    "H10W 72/07178",
    "H10W 72/073",
    "H10W 72/07338",
    "H10W 72/074",
    "H10W 72/325",
    "H10W 72/354",
    "H10W 90/00"
  ],
  "ipc": [
    "B65G 47/92",
    "H01F 41/02",
    "H01F 7/02",
    "H01L 21/673",
    "H01L 33/00"
  ],
  "assignees": [
    "Century Technology Shenzhen Corp Ltd"
  ],
  "inventors": [
    "Po-Liang Chen",
    "Yung-Fu Lin",
    "Hirohisa Tanaka",
    "Yasunori Shimada"
  ],
  "filing_date": "2019-08-22",
  "publication_date": "2021-10-05",
  "grant_date": "2021-10-05",
  "priority_date": "2019-07-05",
  "application_number": "US-201916547852-A",
  "family_id": "68360535",
  "cited_by_count": 2,
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}