Adsorption device comprising a magnetic plate having opposite magnetic poles, transferring system having same

{
  "publication_number": "US11295971B2",
  "country": "US",
  "kind": "B2",
  "title": "Adsorption device comprising a magnetic plate having opposite magnetic poles, transferring system having same",
  "abstract": "An adsorption device includes a magnetic plate and a limiting layer. A surface of the magnetic plate includes a first region and a plurality of second regions spaced apart from each other. The first region and each second region do not overlap with each other. The first region forms a magnetic pole of the magnetic plate, and each second region forms the opposite magnetic pole of the magnetic plate. The limiting layer covers the first region. Each second region is exposed to the limiting layer and configured for adsorbing a small-scale LED as a target object.",
  "claims": [
    "1. An adsorption device, comprising: a magnetic plate, a surface of the magnetic plate comprising a first region and a plurality of second regions spaced apart from each other, the first region and each of the plurality of second regions not overlapping with each other, the first region forming a magnetic pole of the magnetic plate, and each of the plurality of second regions forming a magnetic pole opposite to the magnetic pole of the first region; and a limiting layer on the surface of the magnetic plate, the limiting layer covering the first region, each of the plurality of second regions being exposed to the limiting layer; wherein each of the plurality of second regions is configured for adsorbing a target object; wherein the limiting layer defines a plurality of through holes; each of the plurality of through holes aligns with a corresponding one of the plurality of second regions.",
    "2. The adsorption device of claim 1, wherein the first region surrounds each of the plurality of second regions.",
    "3. The adsorption device of claim 1, wherein each of the plurality of through holes is configured to receive the target object adsorbed by each of the plurality of second regions.",
    "4. The adsorption device of claim 1, wherein each of the plurality of through holes has a cross-sectional area less than or equal to an area of the corresponding one of the plurality of second regions.",
    "5. The adsorption device of claim 1, wherein the limiting layer is made of nonmagnetic material.",
    "6. A transferring system, comprising: a target substrate, a plurality of spots of anisotropic conductive adhesive being applied on the target substrate; and an adsorption device, the adsorption device comprising: a magnetic plate, a surface of the magnetic plate comprising a first region and a plurality of second regions spaced apart from each other, the first region and each of the plurality of second regions not overlapping with each other, the first region forming a magnetic pole of the magnetic plate, and each of the plurality of second regions forming a magnetic pole opposite to the magnetic pole of the first region; and a limiting layer on the surface of the magnetic plate, the limiting layer covering the first region, each of the plurality of second regions being exposed to the limiting layer; wherein each of the plurality of second regions is configured for adsorbing a target object; wherein the limiting layer defines a plurality of through holes; each of the plurality of through holes aligns with a corresponding one of the plurality of second regions.",
    "7. The transferring system of claim 6, wherein the first region surrounds each of the plurality of second regions.",
    "8. The transferring system of claim 6, wherein each of the plurality of through holes is configured to receive the target object adsorbed by the corresponding one of the plurality of second regions.",
    "9. The transferring system of claim 6, wherein each of the plurality of through holes has a cross-sectional area less than or equal to an area of the corresponding one of the plurality of second regions.",
    "10. The transferring system of claim 6, wherein the limiting layer is made of nonmagnetic material."
  ],
  "description_excerpt": "The subject matter herein generally relates to a field of manufacturing display panel, and particularly relates to an adsorption device, a transferring system having the adsorption device, and a transferring method using 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 an isometric view of an adsorption device according to an embodiment of the present disclosure.\n\nFIG. 2 is an exploded view of the adsorption device of FIG. 1.\n\nFIG. 3 is a cross-sectional view of a transferring system according to an embodiment of the present disclosure.\n\nFIG. 4 is a plan view showing the transferring system of FIG. 3 in a working state.\n\nFIG. 5 is a flowchart showing a transferring method using the adsorption device.\n\nFIG. 6 is a cross-sectional view showing the transferring system in a working state.",
  "cpc": [
    "H10P 72/165",
    "B65G 47/92",
    "H01L 21/67336",
    "H01L 33/00",
    "H10H 20/01",
    "H10H 20/0364",
    "H10H 20/80",
    "H10H 20/857",
    "H10P 72/0446",
    "H10P 72/74",
    "H10P 72/7434",
    "H10W 70/682",
    "H10W 72/0198",
    "H10W 72/073",
    "H10W 72/07304",
    "H10W 72/07331",
    "H10W 72/07338",
    "H10W 72/074",
    "H10W 72/325",
    "H10W 72/354",
    "H10W 90/00"
  ],
  "ipc": [
    "B65G 47/92",
    "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": "2022-04-05",
  "grant_date": "2022-04-05",
  "priority_date": "2019-07-05",
  "application_number": "US-201916547854-A",
  "family_id": "68252179",
  "cited_by_count": 2,
  "citations": [
    "US20020043923A1",
    "US6919581B2",
    "US20060093863A1",
    "US7929133B2",
    "US20130210194A1",
    "CN104115266A",
    "CN105789122A",
    "CN109378370A",
    "US20210005490A1",
    "US20210005489A1"
  ]
}