Patents by Inventor Masahiro Aoki

Masahiro Aoki 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: 20220145108
    Abstract: Provided are light-emitting particles having high stability while having perovskite-type semiconductor nanocrystals having excellent light-emitting properties, a method for producing the same, and a light-emitting particle dispersion, an ink composition, and a light-emitting element containing such light-emitting particles. The method for producing light-emitting particles of the present invention includes a step of preparing parent particles 91 composed of perovskite-type semiconductor nanocrystals 911 having light-emitting properties and a surface layer 912 which is composed of ligands coordinated on the surface of the semiconductor nanocrystal 911 and in which the ligand molecules form a siloxane bond with each other, and a step of forming a polymer layer 93 by coating the surface of the parent particle 91 with a hydrophobic polymer.
    Type: Application
    Filed: May 13, 2020
    Publication date: May 12, 2022
    Applicant: DIC Corporation
    Inventors: Koichi Endo, Yasuo Umezu, Yoshio Aoki, Shinichi Hirata, Takuo Hayashi, Masahiro Horiguchi, Misao Horigome, Jianjun Yuan
  • Publication number: 20210173958
    Abstract: A method for causing sending and receiving of an encrypted file between a sending user terminal and a receiving user terminal connected via a network to be performed in a secret state via a management server. The sending user terminal encrypts an original file and then fragments the original file into a plurality of divided files, creates a plurality of combined files formed by combining a plurality of the divided files, and distributes and saves the combined files to which restoration information for opening the combines files has been added in a plurality of online storages. The receiving user terminal can open the combined files obtained from the online storages by using the restoration information received from the management server to extract the divided files included in the combined files, and can restore the original file from the divided files, a number of the divided files being equal to or more than a threshold value.
    Type: Application
    Filed: July 11, 2019
    Publication date: June 10, 2021
    Inventor: Masahiro Aoki
  • Publication number: 20210086227
    Abstract: A composition is provided which contains an organic zinc compound represented by general formula R1—Zn—R1, in which R1 represents a linear or branched alkyl group having 1 to 7 carbon atoms, and an organic metal compound containing a metal element whose oxide has a band gap smaller than 3.2 eV. The composition can be used to form a zinc oxide film by a droplet coating method, such as a spray coating method, at a base material temperature of less than 200° C. A method for producing a zinc oxide film involves coating the composition in the form of droplets at a base material temperature of less than 200° C. to form the zinc oxide film. Using this method, it is possible to provide a zinc oxide thin film having an ultraviolet ray absorption ability, excellent visible light permeability, and a thickness of 1 ?m or less.
    Type: Application
    Filed: February 15, 2019
    Publication date: March 25, 2021
    Inventors: Yujin TAKEMOTO, Tsukasa FUTAGOISHI, Masahiro AOKI
  • Publication number: 20200144623
    Abstract: An aluminum oxide article containing at least aluminum atoms and oxygen atoms is described. When observed under a transmission electron microscope, a cross section of the aluminum oxide article contains crystallized parts, in which a crystal lattice image is recognizable, and a non-crystallized part, in which no crystal lattice image is recognizable, and has an island-and-sea structure consisting of isolated parts containing the crystallized parts and the continuous non-crystallized part. The isolated parts correspond to island parts in the island-and-sea structure, the continuous non-crystallized part corresponds to a sea part, and a plurality of the island parts are uniformly distributed in the sea part. An aluminum oxide for improving the battery performance of a lithium ion secondary battery, the scratch resistance and hardness of a cured film, and the gas barrier properties of a gas barrier film is provided.
    Type: Application
    Filed: March 14, 2018
    Publication date: May 7, 2020
    Applicant: Tosoh Finechem Corporation
    Inventors: Yujin TAKEMOTO, Masahiro AOKI, Kouji TOYOTA, Koichiro INABA, Kentaro SAKAI
  • Publication number: 20170309958
    Abstract: Provided are an electrolytic solution for sodium-ion secondary battery, the solution having sodium-ion conductivity, and including a sodium salt and a non-aqueous solvent, wherein the non-aqueous solvent includes a fluorophosphate ester and propylene carbonate, and a content of the fluorophosphate ester in the non-aqueous solvent is 5 to 50 mass %; and a sodium-ion secondary battery including the same.
    Type: Application
    Filed: October 5, 2015
    Publication date: October 26, 2017
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Shoichiro Sakai, Koji Nitta, Atsushi Fukunaga, Eiko Imazaki, Masahiro Aoki
  • Patent number: 9472829
    Abstract: A method for stabilizing a solution that contains LiPF6 by increasing thermal stability of LiPF6 without changing the structure thereof; an electrolyte solution for nonaqueous secondary batteries, which has increased thermal stability; and a nonaqueous secondary battery which has increased thermal stability. The solution containing LiPF6 contains a phosphoric acid ester amide in such an amount that the molar ratio of the phosphoric acid ester amide relative to LiPF6 is 0.001-2.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: October 18, 2016
    Assignee: TOSOH F-TECH, INC.
    Inventors: Masahiro Aoki, Hideyuki Mimura, Hisao Eguchi
  • Publication number: 20150140445
    Abstract: [Problem] To provide: a method for stabilizing a solution that contains LiPF6 by increasing thermal stability of LiPF6 without changing the structure thereof; an electrolyte solution for nonaqueous secondary batteries, which has increased thermal stability; and a nonaqueous secondary battery which has increased thermal stability. [Solution] To have a solution containing LiPF6 contain a phosphoric acid ester amide represented by general formula (I) in such an amount that the molar ratio of the phosphoric acid ester amide relative to LiPF6 is 0.001-2.
    Type: Application
    Filed: June 13, 2013
    Publication date: May 21, 2015
    Applicant: TOSOH F-TECH, INC.
    Inventors: Masahiro Aoki, Hideyuki Mimura, Hisao Eguchi
  • Patent number: 8909021
    Abstract: Disclosed is a silicon optical waveguide having a small optical loss and no polarization dependency. The silicon optical waveguide is formed on a silicon substrate with an embedded oxide film therebetween, the plane orientation of the surface of the silicon optical waveguide is the (110) plane, the plane orientation of the side wall is the (111) plane, and the recesses and projections of the side wall are planarized at an atomic level.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: December 9, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Shinichi Saito, Masahiro Aoki, Toshiki Sugawara
  • Patent number: 8755423
    Abstract: In order to provide a compact optical module permitting highly efficient optical coupling and having components thereof highly densely packaged, a light emitting diode that is included in the optical module and emits light in a vertical direction with respect to a principal surface of a semiconductor substrate is provided with a lens integrated into a light emitting region, and a retaining section integrated to surround the light emitting region. Accordingly, readiness in alignment of the light emitting diode and an optical fiber, which guides light emitted from the light emitting diode, with each other is upgraded. Eventually, the compact optical module permitting highly efficient optical coupling and having components thereof highly densely packaged can be provided.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: June 17, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Koichiro Adachi, Yasunobu Matsuoka, Toshiki Sugawara, Masahiro Aoki
  • Patent number: 8680553
    Abstract: An object of the present invention is to provide a germanium laser diode that can be easily formed on a substrate such as silicon by using a normal silicon process and can emit light efficiently. A germanium light-emitting device according to the present invention is a germanium laser diode characterized in that tensile strain is applied to single-crystal germanium serving as a light-emitting layer to be of a direct transition type, a thin semiconductor layer made of silicon, germanium or silicon-germanium is connected adjacently to both ends of the germanium light-emitting layer, the thin semiconductor layer has a certain degree of thickness capable of preventing the occurrence of quantum confinement effect, another end of the thin semiconductor layer is connected to a thick electrode doped with impurities at a high concentration, the electrode is doped to a p type and an n type, a waveguide is formed so as not to be in direct contact with the electrode, and a mirror is formed at an end of the waveguide.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: March 25, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Shinichi Saito, Masahiro Aoki, Nobuyuki Sugii, Katsuya Oda, Toshiki Sugawara
  • Patent number: 8451872
    Abstract: A wavelength tunable filter and a wavelength tunable laser module are a codirectional coupler type whose characteristics do not vary significantly with a process error. They are structured so as to include a semiconductor substrate which has a first optical waveguide and a second optical waveguide. The first and the second optical waveguides are extended from a first side of the semiconductor substrate to an opposing second side thereof. The first optical waveguide includes a first core layer, which has a planar layout having periodic convexes and concaves, and a pair of electrodes, which vertically sandwich the first core layer. The second optical waveguide includes a second core layer, which has a lower refractive index than the first core layer. Further, a layer having the same composition and film thickness as the second core layer is placed under the first core layer.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: May 28, 2013
    Assignee: Oclaro Japan, Inc.
    Inventors: Hideo Arimoto, Masahiro Aoki
  • Patent number: 8449160
    Abstract: A multi-wavelength light emitting device includes the following three sections; a light source section having multiple luminous points that emit multiple light beams, a condenser lens section that concentrates the light beams emitted from the luminous points, and a light guide section that propagates superposedly and mixedly the light beams concentrated by the condenser lens section after emission thereof from the luminous points.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: May 28, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Kenichi Tanaka, Masahiro Aoki, Tsukuru Ohtoshi
  • Patent number: 8422350
    Abstract: In an information storage device in which small partitions for storing information are three-dimensionally placed inside a solid, the invention aims at long-period storage, robustness, and rapid information reading. Accordingly, the stored three-dimensional information is divided into two-dimensional data for each layer, and two-dimensional inverse Fourier transform is previously applied for the two-dimensional data. The two-dimensional data is recorded in each layer in a Z direction inside a storage medium which is solid. When the information is reproduced, electromagnetic waves are irradiated to a storage area MA as gradually rotating the storage area MA around a z axis, and projection images of all layers during the rotation are obtained from response. By applying one-dimensional Fourier transform for a plurality of projection images obtained as described above, the recorded original three-dimensional information is rapidly reproduced.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: April 16, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takao Watanabe, Yasunari Obuchi, Masahiro Aoki
  • Publication number: 20120327965
    Abstract: In order to provide a semiconductor laser element or an integrated optical device with high reliability, a horizontal-cavity semiconductor laser or an optical module includes a deeply dug DBR mirror serving as a cavity mirror, the deeply dug DBR mirror being composed of a material that is lattice-matched to a substrate and that has a band gap energy that does not absorb light emitted from an active layer.
    Type: Application
    Filed: February 2, 2010
    Publication date: December 27, 2012
    Inventors: Kazunori Shinoda, Koichiro Adachi, Shinji Tsuji, Masahiro Aoki
  • Publication number: 20120288228
    Abstract: Disclosed is a silicon optical waveguide having a small optical loss and no polarization dependency. The silicon optical waveguide is formed on a silicon substrate with an embedded oxide film therebetween, the plane orientation of the surface of the silicon optical waveguide is the (110) plane, the plane orientation of the side wall is the (111) plane, and the recesses and projections of the side wall are planarized at an atomic level.
    Type: Application
    Filed: February 1, 2010
    Publication date: November 15, 2012
    Inventors: Shinichi Saito, Masahiro Aoki, Toshiki Sugawara
  • Publication number: 20120224594
    Abstract: A wavelength tunable filter and a wavelength tunable laser module are a codirectional coupler type whose characteristics do not vary significantly with a process error. They are structured so as to include a semiconductor substrate which has a first optical waveguide and a second optical waveguide. The first and the second optical waveguides are extended from a first side of the semiconductor substrate to an opposing second side thereof. The first optical waveguide includes a first core layer, which has a planar layout having periodic convexes and concaves, and a pair of electrodes, which vertically sandwich the first core layer. The second optical waveguide includes a second core layer, which has a lower refractive index than the first core layer. Further, a layer having the same composition and film thickness as the second core layer is placed under the first core layer.
    Type: Application
    Filed: May 11, 2012
    Publication date: September 6, 2012
    Applicant: OPNEXT JAPAN, INC.
    Inventors: Hideo ARIMOTO, Masahiro AOKI
  • Patent number: 8194313
    Abstract: A microscope includes an illuminating unit that includes an excitation light source emitting an excitation light, and a phosphor receiving the excitation light and emitting illumination light in a specific wavelength range. The illuminating unit illuminates a specimen with the illumination light. The microscope also includes an observation unit for observing the specimen illuminated by the illuminating unit.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: June 5, 2012
    Assignee: Olympus Corporation
    Inventors: Akihiko Yoshikawa, Atsuhiro Tsuchiya, Masahiro Aoki
  • Patent number: 8179931
    Abstract: A wavelength tunable filter and a wavelength tunable laser module are a codirectional coupler type whose characteristics do not vary significantly with a process error. They are structured so as to include a semiconductor substrate which has a first optical waveguide and a second optical waveguide. The first and the second optical waveguides are extended from a first side of the semiconductor substrate to an opposing second side thereof. The first optical waveguide includes a first core layer, which has a planar layout having periodic convexes and concaves, and a pair of electrodes, which vertically sandwich the first core layer. The second optical waveguide includes a second core layer, which has a lower refractive index than the first core layer. Further, a layer having the same composition and film thickness as the second core layer is placed under the first core layer.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: May 15, 2012
    Assignee: Opnext Japan, Inc.
    Inventors: Hideo Arimoto, Masahiro Aoki
  • Publication number: 20120094190
    Abstract: As to a fluorine-containing phosphate used to impart flame retardancy to an electrolyte solution for a non-aqueous secondary battery, a fluorine-containing phosphate having high flame retardancy and providing high battery performance such as high-rate charge-discharge characteristics, and a method for manufacturing the same are provided. Also provided are a non-aqueous electrolyte solution and a non-aqueous secondary battery each containing the fluorine-containing phosphate. Further a fluorine-containing phosphate having a high ability to dissolve an electrolyte and capable of providing the composition of a safer electrolyte solution is provided.
    Type: Application
    Filed: July 30, 2010
    Publication date: April 19, 2012
    Applicant: TOSOH F-TECH, INC.
    Inventors: Hideyuki Mimura, Kentaro Kono, Hisao Eguchi, Kotaro Sakoda, Masahiro Aoki
  • Patent number: 8036533
    Abstract: An optical element mounting substrate where a plurality of light emitting elements have been mounted on the same plane, a lens array for collimating a plurality of light emitted from the plurality of light emitting elements, and a wavelength multiplexing/demultiplexing device are prepared. The wavelength multiplexing/demultiplexing device has typically mounted both a wavelength selecting filter and a mirror on front and rear planes of a transparent substrate. These three components are mounted within a package at a desirable angle position. Optical axes of respective wavelengths of the wavelength multiplexing/demultiplexing device are determined based upon a thickness and an angle of the light emitting element mounting substrate, and are arrayed on a straight line of a horizontal plane. As a consequence, if the respective light emitting elements are arranged on the optical axes which are exclusively determined by a design work, then optical multiplexing/demultiplexing operations can be carried out.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: October 11, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Hosomi, Misuzu Sagawa, Toshiki Sugawara, Masahiro Aoki