Position measurement method, position control method, measurement method, loading method, exposure method and exposure apparatus, and device manufacturing method

{
  "publication_number": "US8072578B2",
  "country": "US",
  "kind": "B2",
  "title": "Position measurement method, position control method, measurement method, loading method, exposure method and exposure apparatus, and device manufacturing method",
  "abstract": "A part of a plate of a predetermined shape detachably mounted on a moving body is detected by an alignment system while the position of the moving body is measured by a measurement unit that sets a movement coordinate system of the movement body, and based on the detection results and the measurement results of the measurement unit corresponding to the detection results, position information of an outer periphery edge of the plate is obtained. Therefore, even if there are no alignment marks on the moving body for position measurement, the position of the plate, or in other words, the position of the moving body can be controlled on the movement coordinate system set by the measurement unit, based on the position information of the outer periphery edge of the plate.",
  "claims": [
    "1. A method for determining an offset between a center of a substrate and a center of a depression in a chuck, comprising: loading the substrate on a pin of the chuck and moving the substrate by translating the pin in a first direction such that the substrate enters an opening of the depression in the chuck; determining a positional relationship between the substrate and the opening in a plane substantially perpendicular to the first direction once the substrate has entered the opening of the depression without colliding with a surface of the chuck or an edge of the depression in the chuck; and determining the offset of the substrate relative to the depression from determination of the relationship in the plane.",
    "2. The method according to claim 1, wherein loading the substrate on a pin of the chuck is performed with a substrate handler.",
    "3. The method according to claim 1, further comprising calibrating the substrate handler to take into account the offset.",
    "4. The method according to claim 3, wherein calibrating the substrate handler includes shifting positioning of substrates by the substrate handler by an amount to correct for the offset so that a subsequently positioned substrate is substantially centered inside the depression.",
    "5. The method according to claim 3, wherein calibrating the substrate handler includes correcting for substrate positioning so that a gap of a subsequently positioned substrate is equally wide inside the depression."
  ],
  "cpc": [
    "G03F 7/70341",
    "G03F 7/2041",
    "G03F 7/70691",
    "G03F 7/707",
    "G03F 7/70725",
    "G03F 7/70775",
    "G03F 7/70975",
    "G03F 9/7011",
    "G03F 9/7088",
    "Y10T 29/49002"
  ],
  "assignees": [
    "YASUDA MASAHIKO",
    "SUGIHARA TARO",
    "NIKON CORP"
  ],
  "filing_date": "2008-02-19",
  "publication_date": "2011-12-06",
  "grant_date": "2011-12-06",
  "priority_date": "2004-11-18",
  "application_number": "US-7126208-A",
  "family_id": "36407218",
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