Patents by Inventor Osamu Machida

Osamu Machida 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: 20210291231
    Abstract: An electromechanical transducer element includes a base substrate, a first electrode on the base substrate, a piezoelectric body on the first electrode, and a second electrode on the piezoelectric body. The base substrate has a void area opposite to the piezoelectric body via the first electrode, and a width of the void area on a cross section cut along a layer direction of the electromechanical transducer element satisfies 0.65?Pw/Cw?0.95, where Cw represents the width of the void area, and Pw represents a width of the piezoelectric body on the cross section.
    Type: Application
    Filed: March 17, 2021
    Publication date: September 23, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuichi ANDO, Shuya ABE, Osamu MACHIDA
  • Patent number: 11011512
    Abstract: A semiconductor device, comprising a nitride semiconductor layer, a switching element, and a driving transistor; the switching element comprises: a first portion of a first electrode formed on the nitride semiconductor layer; a second electrode formed on the nitride semiconductor layer; and a first control electrode formed on the nitride semiconductor layer and located between the first portion of the first electrode and the second electrode; the driving transistor comprises: a second portion of the first electrode formed on the nitride semiconductor layer and connecting the first portions of the adjacent first electrodes to each other; a third electrode formed on the nitride semiconductor layer and transmitting a signal to the first control electrode; and a second control electrode formed on the nitride semiconductor layer and located between the second portion of the first electrode and the third electrode.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: May 18, 2021
    Assignee: SANKEN ELECTRIC CO., LTD.
    Inventors: Osamu Machida, Yasushi Tasaka
  • Patent number: 10786988
    Abstract: An electromechanical transducer element includes a first electrode on a substrate, an electromechanical transducer film on the first electrode, and a second electrode on the electromechanical transducer film. The electromechanical transducer film includes a thin line pattern. The thin line pattern includes a plurality of thin lines that are spaced away from each other.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: September 29, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Takeuchi, Osamu Machida, Akira Shimofuku, Shuya Abe, Masahiro Ishimori, Takuma Hirabayashi
  • Publication number: 20200111779
    Abstract: A semiconductor device, comprising a nitride semiconductor layer, a switching element, and a driving transistor; the switching element comprises: a first portion of a first electrode formed on the nitride semiconductor layer; a second electrode formed on the nitride semiconductor layer; and a first control electrode formed on the nitride semiconductor layer and located between the first portion of the first electrode and the second electrode; the driving transistor comprises: a second portion of the first electrode formed on the nitride semiconductor layer and connecting the first portions of the adjacent first electrodes to each other; a third electrode formed on the nitride semiconductor layer and transmitting a signal to the first control electrode; and a second control electrode formed on the nitride semiconductor layer and located between the second portion of the first electrode and the third electrode.
    Type: Application
    Filed: September 15, 2017
    Publication date: April 9, 2020
    Applicant: SANKEN ELECTRIC CO., LTD.
    Inventors: Osamu MACHIDA, Yasushi TASAKA
  • Patent number: 10513118
    Abstract: There is provided a method of producing an electromechanical transducer that includes a plurality of electromechanical transducer elements on a substrate. The method includes forming a plurality of individual electrodes corresponding to the plurality of electromechanical transducer elements on the substrate, forming an insulation film to cover the plurality of individual electrodes on the substrate, forming a conductive film on the insulation film, forming a plurality of openings to expose the plurality of individual electrodes in each of the insulation film and the conductive film, and forming a plurality of electromechanical transducer films on the plurality of individual electrodes exposed in the plurality of openings.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: December 24, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shuya Abe, Osamu Machida, Masahiro Ishimori, Takuma Hirabayashi
  • Patent number: 10150293
    Abstract: An electromechanical transducer element includes a first electrode; an electromechanical transducer film stacked on one surface of the first electrode; a second electrode stacked on the electromechanical transducer film; and wiring formed on the second electrode. In an at least one cross section, each of a boundary, on a second electrode side, of the electromechanical transducer film and a boundary, on a side opposite to the electromechanical transducer film, of the second electrode is a curved shape protruding away from the first electrode. In the at least one cross section, each of a film thickness of the electromechanical transducer film and a film thickness of the second electrode becomes thinner toward end portions from a maximum height portion.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: December 11, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Osamu Machida, Masahiro Ishimori, Atsushi Takeuchi, Shuya Abe
  • Patent number: 9969651
    Abstract: A functional ink that includes a precursor sol-gel solution and a solvent is provided. The precursor sol-gel solution is used for forming an oxide dielectric film having a perovskite structure represented by a general formula ABO3, and has been subjected to a partial hydrolysis process in which a viscosity change resulting from the partial hydrolysis process is controlled to be less than or equal to 50%, and water contained in the precursor sol-gel solution is controlled to be greater than or equal to 0.50 times and less than or equal to 10 times by molar ratio with respect to a B site atom contained in the precursor sol-gel solution. The functional ink has a metal oxide concentration and a viscosity that renders the functional ink suitable for being discharged from a nozzle of a liquid droplet discharge apparatus included in a thin film fabrication apparatus.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: May 15, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Takeuchi, Osamu Machida, Akira Shimofuku
  • Publication number: 20180117915
    Abstract: An electromechanical transducer element includes a first electrode on a substrate, an electromechanical transducer film on the first electrode, and a second electrode on the electromechanical transducer film. The electromechanical transducer film includes a thin line pattern. The thin line pattern includes a plurality of thin lines that are spaced away from each other.
    Type: Application
    Filed: August 4, 2017
    Publication date: May 3, 2018
    Inventors: Atsushi TAKEUCHI, Osamu MACHIDA, Akira SHIMOFUKU, Shuya ABE, Masahiro ISHIMORI, Takuma HIRABAYASHI
  • Publication number: 20170362127
    Abstract: A functional ink that includes a precursor sol-gel solution and a solvent is provided. The precursor sol-gel solution is used for forming an oxide dielectric film having a perovskite structure represented by a general formula ABO3, and has been subjected to a partial hydrolysis process in which a viscosity change resulting from the partial hydrolysis process is controlled to be less than or equal to 50%, and water contained in the precursor sol-gel solution is controlled to be greater than or equal to 0.50 times and less than or equal to 10 times by molar ratio with respect to a B site atom contained in the precursor sol-gel solution. The functional ink has a metal oxide concentration and a viscosity that renders the functional ink suitable for being discharged from a nozzle of a liquid droplet discharge apparatus included in a thin film fabrication apparatus.
    Type: Application
    Filed: September 5, 2017
    Publication date: December 21, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Atsushi TAKEUCHI, Osamu MACHIDA, Akira SHIMOFUKU
  • Publication number: 20170306471
    Abstract: There is provided a method of producing an electromechanical transducer that includes a plurality of electromechanical transducer elements on a substrate. The method includes forming a plurality of individual electrodes corresponding to the plurality of electromechanical transducer elements on the substrate, forming an insulation film to cover the plurality of individual electrodes on the substrate, forming a conductive film on the insulation film, forming a plurality of openings to expose the plurality of individual electrodes in each of the insulation film and the conductive film, and forming a plurality of electromechanical transducer films on the plurality of individual electrodes exposed in the plurality of openings.
    Type: Application
    Filed: April 19, 2017
    Publication date: October 26, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Shuya ABE, Osamu MACHIDA, Masahiro ISHIMORI, Takuma HIRABAYASHI
  • Publication number: 20170210132
    Abstract: An electromechanical transducer element includes a first electrode; an electromechanical transducer film stacked on one surface of the first electrode; a second electrode stacked on the electromechanical transducer film; and wiring formed on the second electrode. In an at least one cross section, each of a boundary, on a second electrode side, of the electromechanical transducer film and a boundary, on a side opposite to the electromechanical transducer film, of the second electrode is a curved shape protruding away from the first electrode. In the at least one cross section, each of a film thickness of the electromechanical transducer film and a film thickness of the second electrode becomes thinner toward end portions from a maximum height portion.
    Type: Application
    Filed: January 13, 2017
    Publication date: July 27, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Osamu MACHIDA, Masahiro ISHIMORI, Atsushi TAKEUCHI, Shuya ABE
  • Patent number: 9634230
    Abstract: Disclosed is a method of fabricating an electromechanical transducer film. The method includes treating a surface of a first electrode to be liquid-repellent, the first electrode being formed on one surface of a substrate, irradiating the surface of the first liquid-repellent electrode with an energy ray while moving an irradiation position in accordance with a shape of the electromechanical transducer film to be formed and a shape of an alignment mark to be formed, and forming the alignment mark by applying an application liquid to an area including a portion irradiated with the energy ray in accordance with the shape of the alignment mark in the irradiating step, the application liquid being applied by an inkjet method.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: April 25, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akira Shimofuku, Osamu Machida, Atsushi Takeuchi
  • Patent number: 9533502
    Abstract: An electro-mechanical transducer element is disclosed. The electro-mechanical transducer element includes a first electrode formed on a substrate; an electro-mechanical transducer film formed on at least a part of the first electrode; and a second electrode formed on at least a part of the electro-mechanical transducer film. In at least one cross section of the electro-mechanical transducer film, a film thickness distribution shape is convex to the second electrode side.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: January 3, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Osamu Machida, Akira Shimofuku, Ryo Tashiro, Atsushi Takeuchi
  • Patent number: 9537085
    Abstract: A method of fabricating an electromechanical transducer film includes applying a precursor solution on a support substrate, heating the substrate at a first temperature to form a ceramic thin-film in amorphous state, applying a sol-gel solution onto the ceramic thin-film, and heating the ceramic thin-film at a second temperature to form an electromechanical transducer thin-film in amorphous state. The method further includes heating the ceramic and transducer thin-films at a third temperature to thermally decompose an organic substance in the sol-gel solution and form a unitary thin-film, processing the unitary thin-film to form a patterned unitary thin-film, modifying an area on which the patterned film is not formed, discharging the sol-gel solution onto a surface of the patterned film by a liquid discharge head to apply the sol-gel solution to the surface of the patterned film, and heating the patterned film at a fourth temperature to crystallize the patterned film.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: January 3, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akira Shimofuku, Atsushi Takeuchi, Osamu Machida
  • Publication number: 20160221033
    Abstract: An electronic device includes a substrate; and a plurality of thin-film elements formed on the substrate. Further, the thin-film element includes a thin-film section having a function selected from a group including piezoelectric effect, inverse piezoelectric effect, charge storage, semiconductivity, and conductivity, and the plurality of thin-film elements includes the thin-film sections having two or more different functions.
    Type: Application
    Filed: April 8, 2016
    Publication date: August 4, 2016
    Inventors: Yoshikazu AKIYAMA, Akira SHIMOFUKU, Atsushi TAKEUCHI, Osamu MACHIDA
  • Patent number: 9401471
    Abstract: A manufacturing method of an electromechanical transducing device includes forming a vibration plate on a substrate; forming a first electrode made of a metal on the vibration plate; forming a second electrode made of an electrically conductive oxide on the first electrode; coating a surface modification material and carrying out surface modification of only the first electrode; forming an electromechanical transducing film on the second electrode; and forming a third electrode made of an electrically conductive oxide on the electromechanical transducing film.
    Type: Grant
    Filed: September 5, 2011
    Date of Patent: July 26, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Mizukami, Yoshikazu Akiyama, Masaru Shinkai, Osamu Machida
  • Publication number: 20160049579
    Abstract: A method of fabricating an electromechanical transducer film includes applying a precursor solution on a support substrate, heating the substrate at a first temperature to form a ceramic thin-film in amorphous state, applying a sol-gel solution onto the ceramic thin-film, and heating the ceramic thin-film at a second temperature to form an electromechanical transducer thin-film in amorphous state. The method further includes heating the ceramic and transducer thin-films at a third temperature to thermally decompose an organic substance in the sol-gel solution and form a unitary thin-film, processing the unitary thin-film to form a patterned unitary thin-film, modifying an area on which the patterned film is not formed, discharging the sol-gel solution onto a surface of the patterned film by a liquid discharge head to apply the sol-gel solution to the surface of the patterned film, and heating the patterned film at a fourth temperature to crystallize the patterned film.
    Type: Application
    Filed: August 17, 2015
    Publication date: February 18, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Akira SHIMOFUKU, Atsushi TAKEUCHI, Osamu MACHIDA
  • Patent number: 9202717
    Abstract: A method of making a liquid discharge head which includes a nozzle to discharge liquid, a pressure chamber communicating with the nozzle, a pressure chamber substrate to form surfaces of the pressure chamber, and a piezoelectric actuator to apply pressure to liquid in the pressure chamber having a lower electrode, a ferroelectric film, and an upper electrode, includes a silicon wafer supplying process, a position adjustment process, a surface treatment process to reform a surface of the lower electrode, a liquid applying process to apply ferroelectric precursor on the lower electrode by an inkjet method, a heating process to heat the ferroelectric precursor film, and a cooling process. A series of processes from the position adjustment process to the cooling process is iterated to form a ferroelectric film having a predetermined thickness. The series of processes is performed with certain waiting times inserted between key processes.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: December 1, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Atsushi Takeuchi, Osamu Machida, Akira Shimofuku, Xianfeng Chen, Ryo Tashiro
  • Publication number: 20150307403
    Abstract: A precursor sol-gel solution is provided that has been subjected to a partial hydrolysis process and is used for forming an oxide dielectric film having a perovskite structure represented by the general formula ABO3. The precursor sol-gel solution is subjected to a stabilization process for controlling a viscosity change resulting from the partial hydrolysis process to be less than or equal to 50%, and water contained in the precursor sol-gel solution is controlled to be greater than or equal to 0.50 times and less than or equal to 10 times by molar ratio with respect to a B site atom contained in the precursor sol-gel solution.
    Type: Application
    Filed: April 17, 2015
    Publication date: October 29, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Atsushi TAKEUCHI, Osamu MACHIDA, Akira SHIMOFUKU
  • Patent number: 9085145
    Abstract: Disclosed is an electromechanical transducer film forming method including a surface modification process; an application process; and processes of drying, thermally decomposing, and crystallizing sol-gel solution applied to a portion of a surface of a first electrode. An electromechanical transducer film is formed on a desired pattern area on the surface of the first electrode by repeating the above processes. In the application process, each of dots of the sol-gel solution applied by the inkjet method drops onto both a first area inside the desired pattern area and a second area outside the desired pattern area. The first area is a hydrophilic area on the surface of the first electrode, and the second area is a hydrophobic area on the surface of the first electrode. The hydrophilic area and the hydrophobic area have been modified by the surface modification process.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: July 21, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akira Shimofuku, Osamu Machida, Ryoh Tashiro, Yasuhiro Watanabe