Patents by Inventor Takaharu Komiya
Takaharu Komiya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8121254Abstract: On a multilayer film mirror, a protective layer is formed having a varied composition in the depth direction. The protective layer includes an interface side layer formed on a thin film layer, i.e., the outermost layer of a multilayer film, a surface side layer provided on the interface side layer as the outermost surface of an optical element, and an intermediate layer. The interface side layer has properties such as providing relative absorption of non-exposure light from a light source. The surface side layer suppresses oxidation of the surface of the multilayer film.Type: GrantFiled: July 24, 2009Date of Patent: February 21, 2012Assignee: Nikon CorporationInventors: Katsuhiko Murakami, Takaharu Komiya
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Publication number: 20100190113Abstract: On a multilayer film mirror, a protective layer is formed having a varied composition in the depth direction. The protective layer includes an interface side layer formed on a thin film layer, i.e., the outermost layer of a multilayer film, a surface side layer provided on the interface side layer as the outermost surface of an optical element, and an intermediate layer. The interface side layer has properties such as providing relative absorption of non-exposure light from a light source. The surface side layer suppresses oxidation of the surface of the multilayer film.Type: ApplicationFiled: July 24, 2009Publication date: July 29, 2010Inventors: Katsuhiko Murakami, Takaharu Komiya
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Patent number: 7706058Abstract: A multilayer mirror aims to reduce incidence angle dependence of reflectivity. A substrate is made of low thermal polished expansion glass with 0.2 nm RMS or less roughness of the surface. On the surface thereof formed is a Ru/Si multilayer having a wide full-width half maximum of peak reflectivity, and on the Ru/Si multilayer formed is a Mo/Si multilayer having a high peak reflectivity value. This enables higher reflectivity than when Ru/Si alone provided and a reflectivity peak having a wider full-width half maximum than when the Mo/Si multilayer alone provided. Since Ru absorbs EUV ray more than Mo does, higher reflectivity is obtainable than that of a structure having the Ru/Si multilayer formed on the Mo/Si multilayer. The multilayer with a wide full-width half maximum has small incidence angle dependence of reflectivity in spectral reflectivity, thereby achieving high imaging performance in projection optical system.Type: GrantFiled: September 12, 2008Date of Patent: April 27, 2010Assignee: Nikon CorporationInventors: Noriaki Kandaka, Katsuhiko Murakami, Takaharu Komiya, Masayuki Shiraishi
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Publication number: 20090097104Abstract: A multilayer mirror aims to reduce incidence angle dependence of reflectivity. A substrate is made of low thermal polished expansion glass with 0.2 nm RMS or less roughness of the surface. On the surface thereof formed is a Ru/Si multilayer having a wide full-width half maximum of peak reflectivity, and on the Ru/Si multilayer formed is a Mo/Si multilayer having a high peak reflectivity value. This enables higher reflectivity than when Ru/Si alone provided and a reflectivity peak having a wider full-width half maximum than when the Mo/Si multilayer alone provided. Since Ru absorbs EUV ray more than Mo does, higher reflectivity is obtainable than that of a structure having the Ru/Si multilayer formed on the Mo/Si multilayer. The multilayer with a wide full-width half maximum has small incidence angle dependence of reflectivity in spectral reflectivity, thereby achieving high imaging performance in projection optical system.Type: ApplicationFiled: September 12, 2008Publication date: April 16, 2009Applicant: Nikon CorporationInventors: Noriaki Kandaka, Katsuhiko Murakami, Takaharu Komiya, Masayuki Shiraishi
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Publication number: 20080268380Abstract: An optical apparatus comprises a plurality of multilayer-film reflective mirrors that are capable of reflecting an electromagnetic wave in an extreme ultraviolet region. The multilayer-film reflective mirrors are arranged along an optical axis of the electromagnetic wave, and at least two of the multilayer-film reflective mirrors have reflecting wavelength characteristics being different from each other, in a wavelength region other than the extreme ultraviolet region.Type: ApplicationFiled: April 4, 2008Publication date: October 30, 2008Inventors: Katsuhiko Murakami, Takaharu Komiya
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Publication number: 20080266651Abstract: An optical apparatus comprises a plurality of multilayer-film reflective mirrors that are capable of reflecting a electromagnetic wave in an extreme ultraviolet region. The multilayer-film reflective mirrors are arranged along an optical axis of the electromagnetic wave, and at least two of the multilayer-film reflective mirrors have reflecting, wavelength characteristics being different from each other, in a wavelength region other than the extreme ultraviolet region.Type: ApplicationFiled: February 20, 2008Publication date: October 30, 2008Inventors: Katsuhiko Murakami, Takaharu Komiya
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Patent number: 7440182Abstract: A multilayer mirror aims to reduce incidence angle dependence of reflectivity. A substrate is made of low thermal polished expansion glass with 0.2 nm RMS or less roughness of the surface. On the surface thereof formed is a Ru/Si multilayer having a wide full-width half maximum of peak reflectivity, and on the Ru/Si multilayer formed is a Mo/Si multilayer having a high peak reflectivity value. This enables higher reflectivity than when Ru/Si alone provided and a reflectivity peak having a wider full-width half maximum than when the Mo/Si multilayer alone provided. Since Ru absorbs EUV ray more than Mo does, higher reflectivity is obtainable than that of a structure having the Ru/Si multilayer formed on the Mo/Si multilayer. The multilayer with a wide full-width half maximum has small incidence angle dependence of reflectivity in spectral reflectivity, thereby achieving high imaging performance in projection optical system.Type: GrantFiled: October 17, 2007Date of Patent: October 21, 2008Assignee: Nikon CorporationInventors: Noriaki Kandaka, Katsuhiko Murakami, Takaharu Komiya, Masayuki Shiraishi
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Patent number: 7382527Abstract: A multilayer mirror aims to reduce incidence angle dependence of reflectivity. A substrate is made of low thermal polished expansion glass with 0.2 nm RMS or less roughness of the surface. On the surface thereof formed is a Ru/Si multilayer having a wide full-width half maximum of peak reflectivity, and on the Ru/Si multilayer formed is a Mo/Si multilayer having a high peak reflectivity value. This enables higher reflectivity than when Ru/Si alone provided and a reflectivity peak having a wider full-width half maximum than when the Mo/Si multilayer alone provided. Since Ru absorbs EUV ray more than Mo does, higher reflectivity is obtainable than that of a structure having the Ru/Si multilayer formed on the Mo/Si multilayer. The multilayer with a wide full-width half maximum has small incidence angle dependence of reflectivity in spectral reflectivity, thereby achieving high imaging performance in projection optical system.Type: GrantFiled: April 12, 2006Date of Patent: June 3, 2008Assignee: Nikon CorporationInventors: Noriaki Kandaka, Katsuhiko Murakami, Takaharu Komiya, Masayuki Shiraishi
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Publication number: 20080049307Abstract: A multilayer mirror aims to reduce incidence angle dependence of reflectivity. A substrate is made of low thermal polished expansion glass with 0.2 nm RMS or less roughness of the surface. On the surface thereof formed is a Ru/Si multilayer having a wide full-width half maximum of peak reflectivity, and on the Ru/Si multilayer formed is a Mo/Si multilayer having a high peak reflectivity value. This enables higher reflectivity than when Ru/Si alone provided and a reflectivity peak having a wider full- width half maximum than when the Mo/Si multilayer alone provided. Since Ru absorbs EUV ray more than Mo does, higher reflectivity is obtainable than that of a structure having the Ru/Si multilayer formed on the Mo/Si multilayer. The multilayer with a wide full-width half maximum has small incidence angle dependence of reflectivity in spectral reflectivity, thereby achieving high imaging performance in projection optical system.Type: ApplicationFiled: October 17, 2007Publication date: February 28, 2008Applicant: Nikon CorporationInventors: Nariaki Kandaka, Katsuhiko Murakami, Takaharu Komiya, Masayuki Shiraishi
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Publication number: 20060192147Abstract: A multilayer mirror aims to reduce incidence angle dependence of reflectivity. A substrate is made of low thermal polished expansion glass with 0.2 nm RMS or less roughness of the surface. On the surface thereof formed is a Ru/Si multilayer having a wide full-width half maximum of peak reflectivity, and on the Ru/Si multilayer formed is a Mo/Si multilayer having a high peak reflectivity value. This enables higher reflectivity than when Ru/Si alone provided and a reflectivity peak having a wider full-width half maximum than when the Mo/Si multilayer alone provided. Since Ru absorbs EUV ray more than Mo does, higher reflectivity is obtainable than that of a structure having the Ru/Si multilayer formed on the Mo/Si multilayer. The multilayer with a wide full-width half maximum has small incidence angle dependence of reflectivity in spectral reflectivity, thereby achieving high imaging performance in projection optical system.Type: ApplicationFiled: April 12, 2006Publication date: August 31, 2006Applicant: Nikon CorporationInventors: Noriaki Kandaka, Katsuhiko Murakami, Takaharu Komiya, Masayuki Shiraishi
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Patent number: 5064871Abstract: Disclosed herein is a composition comprising an isocyanate-reactive compound and a catalyst comprising a bismuth carboxylate and a zirconium carboxylate, wherein the catalyst is present in an amount sufficient to catalyze a reaction with the isocyanate-reactive compound and a polyisocyanate. Also disclosed is a process for preparing a composition, which comprises contacting an isocyanate-reactive compound with a polyisocyanate, in the presence of an effective amount of a catalyst comprising a bismuth carboxylate and a zirconium carboxylate, under reaction conditions sufficient to form a composition containing at least one urethane group.Type: GrantFiled: November 13, 1990Date of Patent: November 12, 1991Assignee: Essex Specialty Products, Inc.Inventor: Deborah A. Sciangola