Patents by Inventor Masamitsu Itoh

Masamitsu Itoh 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).

  • Patent number: 8025732
    Abstract: A method for a substrate processing apparatus having a substrate holding mechanism and a chemical solution dispensing/sucking mechanism including a chemical solution dispensing port for supplying a first chemical solution and a chemical solution suction port, includes placing the target substrate on the substrate holding mechanism, laying out an auxiliary plate at a periphery of the substrate such that the two main faces are substantially flush with each other, supplying a second chemical solution onto the main faces, dispensing the first solution from the dispensing port and sucking the first and second solutions through the suction port, with the dispensing and suction ports brought into contact with the second solution, and while dispensing the first solution from the dispensing port and sucking the first solution through the suction port, scanning the dispensing/sucking mechanism such that the dispensing and suction ports are opposed to the main face of the substrate.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: September 27, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideaki Sakurai, Masamitsu Itoh
  • Patent number: 7998759
    Abstract: There is disclosed a manufacturing method for exposure mask, which comprises acquiring a first information showing surface shape of surface of each of a plurality of mask substrates, and a second information showing the flatness of the surface of each of mask substrates before and after chucked on a mask stage of an exposure apparatus, forming a corresponding relation of each mask substrate, the first information and the second information, selecting the second information showing a desired flatness among the second information of the corresponding relation, and preparing another mask substrate having the same surface shape as the surface shape indicated by the first information in the corresponding relation with the selected second information, and forming a desired pattern on the above-mentioned another mask substrate.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: August 16, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masamitsu Itoh
  • Patent number: 7960075
    Abstract: A photomask unit includes a mask substrate having patterns arranged at a pitch P; and a pellicle which protects the mask substrate, wherein the pellicle is configured so that transmittance of incident light of an incident angle ? (0°<?<90°) is higher than transmittance of incident light of an incident angle 0°.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: June 14, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Satoshi Nagai, Kazuya Fukuhara, Masamitsu Itoh, Kenji Kawano, Satoshi Tanaka
  • Patent number: 7912275
    Abstract: A method of evaluating a photo mask, includes measuring each dimension of a plurality of pattern portions of a mask pattern formed on a photo mask, obtaining an inter-pattern distance between the pattern portion and a pattern different from the pattern portion with respect to each of the pattern portions, obtaining a dimensional difference between the measured dimension of the pattern portion and a target dimension of the pattern portion with respect to each of the pattern portions, grouping the dimensional difference obtained for each pattern portion into a plurality of groups in accordance with the inter-pattern distance obtained for each pattern portion, obtaining an evaluation value based on the dimensional difference in each group with respect to each of the groups, and evaluating the photo mask based on the evaluation value.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: March 22, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroki Yamamoto, Masamitsu Itoh, Osamu Ikenaga, Shoji Mimotogi, Hideki Kanai, Yukiyasu Arisawa
  • Patent number: 7906257
    Abstract: A photomask manufacturing method. A pattern dimensional map is generated by preparing a photomask in which a reflective layer formed on a substrate and an absorber pattern is formed on the layer. A reflection correction coefficient map is generated by dividing a mask region, where the absorber pattern is formed, into a plurality of subregions, and determining a reflection correction coefficient for each subregion. The reflection correction value of each subregion is calculated based on the dimensional difference indicated in the pattern dimensional map and the reflection correction coefficient of each subregion. A reflection coefficient of each reflective layer region corresponding to each subregion is changed based on the reflection correction value.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: March 15, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masamitsu Itoh
  • Patent number: 7904851
    Abstract: This invention discloses a photomask manufacturing method. A pattern dimensional map is generated by preparing a photomask in which a mask pattern is formed on a transparent substrate, and measuring a mask in-plane distribution of the pattern dimensions. A transmittance correction coefficient map is generated by dividing a pattern formation region into a plurality of subregions, and determining a transmittance correction coefficient for each of the plurality of subregions. The transmittance correction value of each subregion is calculated on the basis of the pattern dimensional map and the transmittance correction coefficient map. The transmittance of the transparent substrate corresponding to each subregion is changed on the basis of the transmittance correction value.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: March 8, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masamitsu Itoh, Takashi Hirano, Kazuya Fukuhara
  • Publication number: 20100276290
    Abstract: A patterning method includes supplying an imprint material made of a dielectric in an uncured state onto a workpiece, producing a potential difference between the workpiece and a conductive pattern portion of a template opposed to the workpiece to induce dielectric polarization in the imprint material before curing the imprint material, bringing the pattern portion into contact with the imprint material in the uncured state, curing the imprint material with the pattern portion brought into contact with the imprint material, and stripping the template from the imprint material after curing the imprint material.
    Type: Application
    Filed: March 17, 2010
    Publication date: November 4, 2010
    Inventor: Masamitsu Itoh
  • Publication number: 20100228379
    Abstract: A method of manufacturing an exposure mask includes generating or preparing flatness variation data relating to a mask blanks substrate to be processed into an exposure mask, the flatness variation data being data relating to change of flatness of the mask blank substrate caused when the mask blank substrate is chucked by a chuck unit of an exposure apparatus, generating position correction, data of a pattern to be drawn on the mask blanks substrate based on the flatness variation data such that a mask pattern of the exposure mask comes to a predetermined position in a state that the exposure mask is chucked by the chuck unit, and drawing a pattern on the mask blanks substrate, the drawing the pattern including drawing the pattern with correcting a drawing position of the pattern and inputting drawing data corresponding to the pattern and the position correction data into a drawing apparatus.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 9, 2010
    Applicant: KABUSIKI KAISHA TOSHIBA
    Inventor: Masamitsu Itoh
  • Publication number: 20100209829
    Abstract: This invention discloses a photomask manufacturing method. A pattern dimensional map is generated by preparing a photomask in which a mask pattern is formed on a transparent substrate, and measuring a mask in-plane distribution of the pattern dimensions. A transmittance correction coefficient map is generated by dividing a pattern formation region into a plurality of subregions, and determining a transmittance correction coefficient for each of the plurality of subregions. The transmittance correction value of each subregion is calculated on the basis of the pattern dimensional map and the transmittance correction coefficient map. The transmittance of the transparent substrate corresponding to each subregion is changed on the basis of the transmittance correction value.
    Type: Application
    Filed: April 29, 2010
    Publication date: August 19, 2010
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masamitsu Itoh, Takashi Hirano, Kazuya Fukuhara
  • Publication number: 20100203432
    Abstract: An exposure mask includes: an insulative substrate; a light reflecting film provided on the substrate; a light absorbing film provided on the light reflecting film and forming a pattern in a center region on the substrate; and an interconnect provided on the substrate, the light reflecting film and the light absorbing film not being provided in a frame-shaped region surrounding the center region, and the interconnect being placed so that a portion of a laminated film composed of the light reflecting film and the light absorbing film located inside the frame-shaped region is electrically connected to a portion of the laminated film located outside the frame-shaped region.
    Type: Application
    Filed: February 4, 2010
    Publication date: August 12, 2010
    Inventor: Masamitsu ITOH
  • Patent number: 7740994
    Abstract: According to an aspect of the invention, there is provided a method for selecting a photomask substrate, including dividing a chip area scheduled to be arranged on the photomask substrate regarding a specific transfer pattern layer into a management pattern area in which an element pattern changed in shape by birefringence of the photomask substrate is arranged, and an area other than the management pattern area, setting a standard value of a size of birefringence of an area in which the management pattern area of the photomask substrate is arranged, inspecting the size of the birefringence of each of a plurality of photomask substrate candidates, and selecting a photomask substrate, in which the size of the birefringence satisfies the standard value, as a photomask substrate of the specific transfer pattern layer from the plurality of photomask substrate candidates.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: June 22, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuya Fukuhara, Masamitsu Itoh
  • Patent number: 7703066
    Abstract: A method of manufacturing an exposure mask includes generating or preparing flatness variation data relating to a mask blanks substrate to be processed into an exposure mask, the flatness variation data being data relating to change of flatness of the mask blank substrate caused when the mask blank substrate is chucked by a chuck unit of an exposure apparatus, generating position correction data of a pattern to be drawn on the mask blanks substrate based on the flatness variation data such that a mask pattern of the exposure mask comes to a predetermined position in a state that the exposure mask is chucked by the chuck unit, and drawing a pattern on the mask blanks substrate, the drawing the pattern including drawing the pattern with correcting a drawing position of the pattern and inputting drawing data corresponding to the pattern and the position correction data into a drawing apparatus.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: April 20, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masamitsu Itoh
  • Publication number: 20100075443
    Abstract: A template inspection method for performing defect inspection of a template, by bringing a pattern formation surface of a template used to form a pattern close to a first fluid coated on a flat substrate, filling the first fluid into a pattern of the template, and by performing optical observation of the template in a state that the first fluid is sandwiched between the template and the substrate, wherein a difference between an optical constant of the first fluid and an optical constant of the template is larger than a difference between an optical constant of air and the optical constant of the template.
    Type: Application
    Filed: September 3, 2009
    Publication date: March 25, 2010
    Inventors: Ikuo YONEDA, Tetsuro Nakasugi, Masamitsu Itoh, Ryoichi Inanami
  • Patent number: 7673281
    Abstract: A pattern evaluation method for evaluating a mask pattern includes generating desired wafer pattern data corresponding to the evaluation position of a mask pattern, generating mask pattern contour data based on an image of the mask pattern, and performing a lithography/simulation process based on the mask pattern contour data and generating predicted wafer pattern data when the mask pattern is transferred to a wafer. Further, it includes deriving positional offset between the mask pattern contour data and mask pattern data, correcting a positional error between the desired wafer pattern data and the predicted wafer pattern data based on the positional offset, and comparing the desired wafer pattern data with the predicted wafer pattern data with the positional error corrected.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: March 2, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Eiji Yamanaka, Masamitsu Itoh, Mitsuyo Asano, Shinji Yamaguchi
  • Publication number: 20100032566
    Abstract: A substrate surface inspection method inspects for a defect on a substrate including a plurality of materials on a surface thereof. The inspection method comprises: irradiating the surface of the substrate with an electron beam, a landing energy of the electron beam set such that a contrast between at least two types of materials of the plurality of materials is within a predetermined range; detecting electrons generated by the substrate to acquire a surface image of the substrate, with a pattern formed thereon from the at least two types of materials eliminated or weakened; and detecting the defect from the acquired surface image by detecting as the defect an object image having a contrast by which the object image can be distinguished from a background image in the surface image. Defects present on the substrate surface can be detected easily and precisely by using a cell inspection.
    Type: Application
    Filed: August 7, 2009
    Publication date: February 11, 2010
    Applicants: EBARA CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiko Naito, Norio Kimura, Kenji Terao, Masahiro Hatakeyama, Masamitsu Itoh
  • Publication number: 20100021826
    Abstract: A reflective mask comprising: a reflective layer that is arranged on a surface on a side on which EUV light is irradiated and reflects the EUV light; a buffer layer containing Cr that is arranged on a side of the reflective layer on which the EUV light is irradiated and covers an entire surface of the reflective layer; and a non-reflective layer that is arranged on a side of the buffer layer on which the EUV light is irradiated and in which an absorber that absorbs the irradiated EUV light is arranged in a position corresponding to a mask pattern to be reduced and transferred onto a wafer.
    Type: Application
    Filed: June 24, 2009
    Publication date: January 28, 2010
    Inventors: Ryoichi INANAMI, Yumi NAKAJIMA, Masamitsu ITOH
  • Publication number: 20100003830
    Abstract: A pattern is formed on a mask substrate. Positional deviation information between an actual position of the pattern formed on the mask substrate and a design position decided at the time of designing the pattern is calculated. A heterogeneous layer of which a volume expands more greatly than that of surrounding mask substrate region is formed in a predetermined position within the mask substrate so that volume expansion of the heterogeneous layer according to the positional deviation information is achieved.
    Type: Application
    Filed: January 8, 2009
    Publication date: January 7, 2010
    Inventor: Masamitsu Itoh
  • Publication number: 20090317732
    Abstract: A pattern verification-test method according to an embodiment of the present invention includes: deriving an illumination condition at a verification-test subject position in a photomask surface of a mask pattern as a verification or a test subject based on the verification-test subject position and illumination condition information about a distribution of an illumination condition in a photomask surface of exposure light incident on the mask pattern, performing lithography simulation on the mask pattern based on the derived illumination condition and the mask pattern, and verifying or testing the mask pattern based on a result of the lithography simulation.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 24, 2009
    Inventors: Masamitsu ITOH, Satoshi Tanaka
  • Publication number: 20090305153
    Abstract: A substrate processing method uses a processing fluid to selectively process only a region of a portion of a processing surface of a substrate to be processed, by causing a discharge aperture and a suction aperture of a nozzle having the discharge aperture and the suction aperture for the processing fluid and provided movable relative to the substrate to be processed to face the processing surface of the substrate and suctioning the processing fluid supplied onto the processing surface through the suction aperture while supplying the processing fluid from the discharge aperture onto the processing surface.
    Type: Application
    Filed: June 5, 2009
    Publication date: December 10, 2009
    Inventors: Hideaki Sakurai, Yukio Oppata, Masamitsu Itoh
  • Patent number: 7629088
    Abstract: According to an aspect of the invention, there is provided a mask defect repairing method of repairing a defect caused by a foreign object on a light transmissive photomask, the method including moving the foreign object on a light transmission section of the light transmissive photomask using a manipulator, and placing the foreign object on a shielding section of the light transmissive photo mask.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: December 8, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masamitsu Itoh