Invention Grant
- Patent Title: Multilayer reflective film coated substrate, manufacturing method thereof, reflective mask blank, and reflective mask
- Patent Title (中): 多层反射膜涂布基板,其制造方法,反射掩模板和反射掩模
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Application No.: US11580934Application Date: 2006-10-16
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Publication No.: US07804648B2Publication Date: 2010-09-28
- Inventor: Morio Hosoya , Takeyuki Yamada , Akira Ikeda
- Applicant: Morio Hosoya , Takeyuki Yamada , Akira Ikeda
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2005-300556 20051014
- Main IPC: G02B1/10
- IPC: G02B1/10

Abstract:
A multilayer reflective film coated substrate includes a multilayer under film comprised of Mo/Si alternately-layered films and a multilayer reflective film comprised of Mo/Si alternately-layered films for reflecting exposure light. The multilayer under film and the multilayer reflective film are formed on a substrate in this order. Given that a cycle length of the multilayer under film is d bottom (unit:nm) and a cycle length of the multilayer reflective film is d top (unit:nm), a relationship of a formula (1) is satisfied when d bottom>d top, the formula (1) given by (n+0.15)×d top≦d bottom≦(n+0.9)×d top where n is a natural number equal to or greater than 1.
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