• Patent Title: Method for producing substrate with multilayer reflective film, method for producing reflective mask blank and method for producing reflective mask
  • Application No.: US14369414
    Application Date: 2013-03-21
  • Publication No.: US09229316B2
    Publication Date: 2016-01-05
  • Inventor: Tsutomu ShokiKazuhiro Hamamoto
  • Applicant: HOYA CORPORATION
  • Applicant Address: JP Tokyo
  • Assignee: HOYA CORPORATION
  • Current Assignee: HOYA CORPORATION
  • Current Assignee Address: JP Tokyo
  • Agency: Sughrue Mion, PLLC
  • Priority: JP2012-073220 20120328
  • International Application: PCT/JP2013/057950 WO 20130321
  • International Announcement: WO2013/146488 WO 20131003
  • Main IPC: G03F1/24
  • IPC: G03F1/24 G03F1/42
Method for producing substrate with multilayer reflective film, method for producing reflective mask blank and method for producing reflective mask
Abstract:
Disclosed is a method for producing a substrate with a multilayer reflective film for EUV lithography including a multilayer reflective film disposed on a principal surface of a substrate, the method including a multilayer reflective film formation step of forming the multilayer reflective film on the principal surface of the substrate in such a manner that the multilayer reflective film has a slope region in which the film thickness is decreased in a direction from the inside to the outside of the substrate on a peripheral portion of the principal surface, and a fiducial mark formation step of forming fiducial marks in the slope region by removing at least a portion of the multilayer reflective film, the fiducial marks serving as references for a defective location indicated by defect information with respect to the surface of the substrate with the multilayer reflective film.
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