Patents by Inventor Shigeru Hirukawa

Shigeru Hirukawa 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).

  • Publication number: 20080309896
    Abstract: An exposure method forms an immersion area in at least a part of a substrate including a projection area of a projection optical system and projects an image of a mask pattern onto the substrate through liquid between the projection optical system and the substrate. Distribution of the mask pattern is measured and adjustment is made so that a desired image of the pattern is projected onto the substrate according to distribution of the exposure light incident into the liquid between the projection optical system and the substrate when exposing the substrate. It is possible to expose the substrate with the pattern accurately regardless of the distribution of the mask pattern.
    Type: Application
    Filed: August 14, 2008
    Publication date: December 18, 2008
    Applicant: NIKON CORPORATION
    Inventor: Shigeru Hirukawa
  • Patent number: 7446858
    Abstract: An exposure method and apparatus simultaneously transfer patterns with various pitches with high resolution. On the pupil surface of an illumination system, nine areas are set. The nine areas are a first area including the optical axis, four second areas each smaller than the first area and arranged along a first circumference surrounding the first area, and four third areas each smaller than the first area and arranged along a second circumference surrounding the first circumference and arranged along a second circumference. The distribution of intensity of light over the pupil surface is so set that the intensities of light over the nine areas are approximately equal to one another, and the intensity of light over the other area is smaller than those over the nine areas. This distribution of intensity of light is set using a diffraction optical element or a diaphragm.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: November 4, 2008
    Assignee: Nikon Corporation
    Inventors: Takehito Kudo, Shigeru Hirukawa
  • Patent number: 7446851
    Abstract: In a lithographic projection apparatus includes an illumination system arranged to condition a radiation beam, a support structure configured to hold a patterning device, the patterning device being capable of imparting the radiation beam with a pattern, a substrate table configured to hold a substrate, and a projection system arranged to project the patterned radiation beam onto a target portion of the substrate. In addition, a liquid supply system is configured to provide a liquid to a space between the projection system and the substrate, the liquid supply system having a member extending along at least part of the boundary of the space, wherein the member has a liquid inlet which faces the substrate.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: November 4, 2008
    Assignee: Nikon Corporation
    Inventor: Shigeru Hirukawa
  • Publication number: 20080252865
    Abstract: An exposure apparatus forms an immersion area of a liquid on the side of the image plane of a projection optical system and performs exposure of a substrate via the projection optical system and the liquid of the immersion region. The exposure apparatus has an optical cleaning unit which irradiates a predetermined irradiation light, having an optical cleaning effect, onto, for example, the upper surface of the substrate stage which makes contact with the liquid for forming the immersion area. Thus, it is possible to prevent deterioration of the exposure accuracy and measurement accuracy due to pollution of the member in contact with the liquid in the immersion region.
    Type: Application
    Filed: June 9, 2008
    Publication date: October 16, 2008
    Applicant: NIKON CORPORATION
    Inventors: Hiroyuki Nagasaka, Kenichi Shiraishi, Soichi Owa, Shigeru Hirukawa
  • Patent number: 7436486
    Abstract: A lithographic projection apparatus includes an illumination system arranged to condition a radiation beam, a support structure configured to hold a patterning device, the patterning device being capable of imparting the radiation beam with a pattern, a substrate table configured to hold a substrate, and a projection system arranged to project the patterned radiation beam onto a target portion of the substrate. In addition, a liquid supply system is configured to at least partly fill a space between the projection system and an object on the substrate table, with a liquid, and a measurement device is configured to obtain a pressure of liquid in the space.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: October 14, 2008
    Assignee: Nikon Corporation
    Inventor: Shigeru Hirukawa
  • Patent number: 7405803
    Abstract: A second communications server obtains adjustment information of an adjustment unit in an exposure apparatus and information related to image forming quality (such as wavefront aberration) of a projection optical system under an exposure condition that serves as a reference, via a first communications server, and then calculates an optimal adjustment amount of the adjustment unit under a target exposure condition based on the information. In addition, the second communications server obtains adjustment information of the adjustment and actual measurement data of image forming quality of the projection optical system via the first communications server, and then calculates the optimal adjustment amount of the adjustment unit under the target exposure condition based on the information. And, the second communications server controls the adjustment unit in the exposure apparatus via the first communications server, based on the calculations results.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: July 29, 2008
    Assignee: Nikon Corporation
    Inventors: Yasuo Shimizu, Shigeru Hirukawa, Kousuke Suzuki, Tomoyuki Matsuyama
  • Publication number: 20080151203
    Abstract: An exposure apparatus illuminates a pattern with an energy beam and transfers the pattern onto a substrate via a projection optical system. The exposure apparatus includes a substrate stage on which the substrate is mounted and that moves within a two-dimensional plane holding the substrate. A supply mechanism supplies liquid to a space between the projection optical system and the substrate on the substrate stage. A recovery mechanism recovers the liquid and an auxiliary recovery mechanism recovers the liquid which could not be recovered by the recovery mechanism.
    Type: Application
    Filed: January 30, 2008
    Publication date: June 26, 2008
    Applicant: NIKON CORPORATION
    Inventors: Shigeru Hirukawa, Nobutaka Magome, Issey Tanaka
  • Patent number: 7391497
    Abstract: A second communications server obtains adjustment information of an adjustment unit in an exposure apparatus and information related to image forming quality (such as wavefront aberration) of a projection optical system under an exposure condition that serves as a reference, via a first communications server, and then calculates an optimal adjustment amount of the adjustment unit under a target exposure condition based on the information. In addition, the second communications server obtains adjustment information of the adjustment and actual measurement data of image forming quality of the projection optical system via the first communications server, and then calculates the optimal adjustment amount of the adjustment unit under the target exposure condition based on the information. And, the second communications server controls the adjustment unit in the exposure apparatus via the first communications server, based on the calculations results.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: June 24, 2008
    Assignee: Nikon Corporation
    Inventors: Yasuo Shimizu, Shigeru Hirukawa, Kousuke Suzuki, Tomoyuki Matsuyama
  • Publication number: 20080117394
    Abstract: An exposure apparatus exposes a substrate by projecting a pattern image onto the substrate through a liquid. The exposure apparatus includes a projection optical system by which the pattern image is projected onto the substrate, and a movable member which is movable relative to the projection optical system. A liquid-repellent member, at least a part of a surface of which is liquid-repellent, is provided detachably on the movable member, the liquid-repellent member being different from the substrate.
    Type: Application
    Filed: January 10, 2008
    Publication date: May 22, 2008
    Applicant: NIKON CORPORATION
    Inventors: Soichi Owa, Nobutaka Magome, Shigeru Hirukawa, Yoshihiko Kudo
  • Publication number: 20080106707
    Abstract: An exposure apparatus (EX) exposes a substrate (P) by irradiating exposure light (EL) on the substrate (P) through liquid (LQ). The exposure apparatus (EX) has a substrate holder (PH) for holding the substrate (P), a substrate stage (PST) capable of moving the substrate (P) held by the substrate holder (PH), and a temperature adjusting system (60) for adjusting the temperature of the substrate holder (PH). The temperature of the substrate (P) is controlled so that there is no difference in temperature between the substrate (P) and the liquid (LQ), thereby preventing a reduction in exposure accuracy resulting from variation in temperature of the liquid (LQ).
    Type: Application
    Filed: February 3, 2005
    Publication date: May 8, 2008
    Applicant: Nikon Corporation
    Inventors: Naoyuki Kobayashi, Soichi Owa, Shigeru Hirukawa, Yasuhiro Omura
  • Publication number: 20080068572
    Abstract: An exposure method and apparatus simultaneously transfer patterns with various pitches with high resolution. On the pupil surface of an illumination system, nine areas are set. The nine areas are a first area including the optical axis, four second areas each smaller than the first area and arranged along a first circumference surrounding the first area, and four third areas each smaller than the first area and arranged along a second circumference surrounding the first circumference and arranged along a second circumference. The distribution of intensity of light over the pupil surface is so set that the intensities of light over the nine areas are approximately equal to one another, and the intensity of light over the other area is smaller than those over the nine areas. This distribution of intensity of light is set using a diffraction optical element or a diaphragm.
    Type: Application
    Filed: September 20, 2007
    Publication date: March 20, 2008
    Applicant: NIKON CORPORATION
    Inventors: Takehito Kudo, Shigeru Hirukawa
  • Publication number: 20070263196
    Abstract: A lithographic projection apparatus is arranged to project a pattern from a patterning device onto a substrate through a liquid confined to a space adjacent to the substrate. The apparatus includes a liquid diverter in the space to promote liquid flow across the space.
    Type: Application
    Filed: July 20, 2007
    Publication date: November 15, 2007
    Applicant: NIKON CORPORATION
    Inventors: Shigeru Hirukawa, Nobutaka Magome, Issey Tanaka
  • Publication number: 20070258064
    Abstract: An exposure apparatus illuminates a pattern with an energy beam and transfers the pattern onto a substrate via a projection optical system. The exposure apparatus includes a substrate stage on which the substrate is mounted that moves within a two-dimensional plane holding the substrate. The apparatus also includes a supply mechanism that supplies liquid to a predetermined spatial area which includes a space between the projection optical system and the substrate on the substrate stage, and an adjustment unit that adjusts exposure conditions based on temperature information on the liquid between the projection optical system and the substrate.
    Type: Application
    Filed: July 10, 2007
    Publication date: November 8, 2007
    Applicant: NIKON CORPORATION
    Inventor: Shigeru Hirukawa
  • Publication number: 20070258072
    Abstract: An exposure apparatus EXS forms an immersion area AR2 of a liquid LQ on the side of the image plane of a projection optical system PL and performs exposure of a substrate P via the projection optical system PL and the liquid LQ of the immersion region AR2. The exposure apparatus EXS has an optical cleaning unit (80) which irradiates a predetermined irradiation light Lu, having an optical cleaning effect, onto, for example, the upper surface (31) of the substrate stage PST which makes contact with the liquid LQ for forming the immersion area AR2. Thus, it is possible to prevent deterioration of the exposure accuracy and measurement accuracy due to pollution of the member in contact with the liquid in the immersion region.
    Type: Application
    Filed: July 11, 2007
    Publication date: November 8, 2007
    Applicant: NIKON CORPORATION
    Inventors: Hiroyuki Nagasaka, Kenichi Shiraishi, Soichi Owa, Shigeru Hirukawa
  • Publication number: 20070242242
    Abstract: An exposure apparatus (EX) is an apparatus which exposes a substrate (P) by irradiating exposure light (EL) onto the substrate (P) via a projection optical system (PL) and a liquid (1). The exposure apparatus (EX) has a substrate table (PT) for holding the substrate (P), and a plate member (30) having a liquid repellent flat surface (30A) is replaceably provided to the substrate table (PT) to prevent the liquid from remaining, maintaining excellent exposure accuracy.
    Type: Application
    Filed: December 3, 2004
    Publication date: October 18, 2007
    Applicant: Nikon Corporation
    Inventors: Hiroyuki Nagasaka, Hiroaki Takaiwa, Shigeru Hirukawa, Ryuichi Hoshika, Hitoshi Ishizawa
  • Publication number: 20070188727
    Abstract: A second communications server obtains adjustment information of an adjustment unit in an exposure apparatus and information related to image forming quality (such as wavefront aberration) of a projection optical system under an exposure condition that serves as a reference, via a first communications server, and then calculates an optimal adjustment amount of the adjustment unit under a target exposure condition based on the information. In addition, the second communications server obtains adjustment information of the adjustment and actual measurement data of image forming quality of the projection optical system via the first communications server, and then calculates the optimal adjustment amount of the adjustment unit under the target exposure condition based on the information. And, the second communications server controls the adjustment unit in the exposure apparatus via the first communications server, based on the calculations results.
    Type: Application
    Filed: April 17, 2007
    Publication date: August 16, 2007
    Applicant: Nikon Corporation
    Inventors: Yasuo Shimizu, Shigeru Hirukawa, Kousuke Suzuki, Tomoyuki Matsuyama
  • Publication number: 20070188726
    Abstract: A second communications server obtains adjustment information of an adjustment unit in an exposure apparatus and information related to image forming quality (such as wavefront aberration) of a projection optical system under an exposure condition that serves as a reference, via a first communications server, and then calculates an optimal adjustment amount of the adjustment unit under a target exposure condition based on the information. In addition, the second communications server obtains adjustment information of the adjustment and actual measurement data of image forming quality of the projection optical system via the first communications server, and then calculates the optimal adjustment amount of the adjustment unit under the target exposure condition based on the information. And, the second communications server controls the adjustment unit in the exposure apparatus via the first communications server, based on the calculations results.
    Type: Application
    Filed: April 17, 2007
    Publication date: August 16, 2007
    Applicant: Nikon Corporation
    Inventors: Yasuo Shimizu, Shigeru Hirukawa, Kousuke Suzuki, Tomoyuki Matsuyama
  • Patent number: 7242455
    Abstract: An exposure apparatus performs exposure for a substrate by filling a space between a projection optical system and the substrate with a liquid and projecting an image of a pattern onto the substrate through the liquid by using the projection optical system. The exposure apparatus includes a substrate stage for holding the substrate, a liquid supply unit for supplying the liquid to a side of an image plane of the projection optical system, and a focus/leveling-detecting system for detecting surface information about a surface of the substrate not through the liquid. The exposure apparatus performs liquid immersion exposure for the substrate while adjusting a positional relationship between the surface of the substrate and the image plane formed through the projection optical system and the liquid, on the basis of the surface information detected by the focus/leveling-detecting system. The liquid immersion exposure can be performed at a satisfactory pattern transfer accuracy.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: July 10, 2007
    Assignee: Nikon Corporation
    Inventors: Masahiro Nei, Naoyuki Kobayashi, Hiroshi Chiba, Shigeru Hirukawa
  • Publication number: 20070134940
    Abstract: A device linewidth characteristic is predicted based on a sharp-edged feature of a projected image of a predetermined pattern (steps 104 to 110), and an exposure condition of the pattern is adjusted based on the device linewidth characteristic that has been predicted (step 112). Then, exposure is performed under the adjusted exposure condition. That is, patterning of a resist on a substrate is performed with the projected image of the pattern (step 114). And, by developing the substrate after patterning, a resist pattern that satisfies a desired device linewidth characteristic is formed on the substrate. Accordingly, by performing etching of the substrate with the resist pattern serving as a mask, a pattern after etching can be formed with a desired linewidth.
    Type: Application
    Filed: November 16, 2006
    Publication date: June 14, 2007
    Applicant: NIKON CORPORATION
    Inventor: Shigeru Hirukawa
  • Patent number: 7230682
    Abstract: An exposure method of forming pattern on object via projection optical system, including deciding optimal adjustment amount of adjustment device which adjusts image forming property of the projection optical system to optimize the image forming property under pattern to be formed and exposure condition of the pattern, based on information related to wavefront aberration of the projection optical system, Zernike Sensitivity Chart corresponding to the pattern and the exposure condition, wavefront aberration variation table that denotes relation between adjustment amount of the adjustment device and change in coefficients of terms in the Zernike polynomial, and restraint condition with respect to the adjustment amount of the adjustment device, and exposing the pattern on the object under the exposure condition via the projection optical system of which the image forming property is adjusted by the adjustment device based on the decided optimal adjustment amount.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: June 12, 2007
    Assignee: Nikon Corporation
    Inventors: Yasuo Shimizu, Shigeru Hirukawa, Kousuke Suzuki, Tomoyuki Matsuyama