Invention Application
US20080273847A1 Fiber-based optical alignment system 有权
光纤对准系统

  • Patent Title: Fiber-based optical alignment system
  • Patent Title (中): 光纤对准系统
  • Application No.: US12154684
    Application Date: 2008-05-24
  • Publication No.: US20080273847A1
    Publication Date: 2008-11-06
  • Inventor: Morgan T. Johnson
  • Applicant: Morgan T. Johnson
  • Main IPC: G02B6/04
  • IPC: G02B6/04
Fiber-based optical alignment system
Abstract:
A low-cost alignment system suitable for aligning a wafer to a test fixture includes a bundle of optical fibers wherein at least one fiber serves to deliver illumination to the alignment target from an end thereof, and a plurality of receiver fibers, each having ends with a known spatial relationship to the end of the illuminator fiber. The ends of the fiber bundle have a known spatial relationship to the fixture. In some embodiments, the fiber bundle is disposed within the fixture such that there is an unobscured optical path between the wafer and the receiving and illuminating ends of the fibers. In some embodiments, the fiber bundle is coupled to a light source and a light sensor mounted on the fixture. In some embodiments the alignment target is one or more bonding pads disposed on a wafer.
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