Patents by Inventor Ichiro Asaoka

Ichiro Asaoka 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: 20230235436
    Abstract: An amorphous alloy soft magnetic powder has a composition represented by (FexCo1-x)100-(a+b)(SiyB1-y)aMb, where M is at least one selected from the group consisting of C, S, P, Sn, Mo, Cu, and Nb, and x, y, a, and b satisfy 0.73?x?0.85, 0.02?y?0.10, 13.0?a?19.0, and 0?b?2.0. A Si—K absorption edge XANES spectrum obtained when performing an XAFS measurement on particles has a peak A present in a range of 1842±1 eV, a peak B present in a range of 1845±1 eV, and a peak C present in a range of 1848±1 eV. An intensity ratio A/C is 0.40 or less, and an intensity ratio B/C is 0.60 or less.
    Type: Application
    Filed: January 26, 2023
    Publication date: July 27, 2023
    Inventors: Mayu WATANABE, Takuma ENOMOTO, Kai KITAMURA, Junya ABE, Atsushi NAKAMURA, Masayuki OMOTO, Ichiro ASAOKA
  • Patent number: 11437565
    Abstract: A piezoelectric element including an electrode and a piezoelectric layer provided on the electrode and having a perovskite structure including lead, zirconium, and titanium is provided. A radial distribution function obtained from an extended X-ray absorption fine structure of an L3 absorption edge of lead in an X-ray absorption spectrum of the piezoelectric layer at an interface with the electrode satisfies a formula (1) below A/B?1??(1) (in the formula (1), A represents an intensity of a peak attributable to oxygen atoms closest to lead atoms; and B represents an intensity of a peak attributable to oxygen atoms second closest to the lead atoms).
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: September 6, 2022
    Inventors: Masayuki Omoto, Ichiro Asaoka, Hiromu Miyazawa
  • Patent number: 10686117
    Abstract: A piezoelectric element includes a first electrode disposed over a substrate, an orientation control layer disposed over the first electrode and containing titanium, a piezoelectric layer disposed over the orientation control layer and having a perovskite crystal structure, and a second electrode disposed over the piezoelectric layer. The orientation control layer has a thickness in the range of 5.0 nm to 22.0 nm.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: June 16, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Morozumi, Hiromu Miyazawa, Toshihiro Shimizu, Ichiro Asaoka
  • Patent number: 10611152
    Abstract: Provided is a liquid ejecting head including a pressure chamber to accommodate a liquid, a vibration plate, a nozzle to eject the liquid, and a piezoelectric element. The piezoelectric element includes a piezoelectric body layer, a first electrode disposed on one surface of the piezoelectric body layer, and a second electrode disposed on the other surface of the piezoelectric body layer. The liquid ejecting head further includes wiring connected to the second electrode and extended along a surface direction of the piezoelectric body layer, and does not include a metal layer having the same potential as the first electrode in a first area which is an area positioned between the wiring and the vibration plate and in which the wiring overlaps with none of the second electrode and the piezoelectric body layer in a direction perpendicular to a surface direction of the second electrode.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: April 7, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Ichiro Asaoka, Eiju Hirai, Tsutomu Nishiwaki, Hiroshi Kato
  • Patent number: 10573463
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: February 25, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Ichiro Asaoka, Koichi Morozumi, Masato Shimada, Akira Kuriki
  • Publication number: 20190288179
    Abstract: A piezoelectric element includes a first electrode disposed over a substrate, an orientation control layer disposed over the first electrode and containing titanium, a piezoelectric layer disposed over the orientation control layer and having a perovskite crystal structure, and a second electrode disposed over the piezoelectric layer. The orientation control layer has a thickness in the range of 5.0 nm to 22.0 nm.
    Type: Application
    Filed: March 14, 2019
    Publication date: September 19, 2019
    Inventors: Koichi MOROZUMI, Hiromu MIYAZAWA, Toshihiro SHIMIZU, Ichiro ASAOKA
  • Patent number: 10391769
    Abstract: Provided is a liquid ejecting head that ejects a liquid in a pressure chamber by a piezoelectric device, the piezoelectric device including a vibration plate, a piezoelectric layer containing lead, a first electrode provided between the vibration plate and the piezoelectric layer, and a second electrode provided on a side opposite to a side of the first electrode as viewed from the piezoelectric layer. The piezoelectric layer is preferentially oriented in a (100) plane, a lattice constant c defined by a crystal plane of the piezoelectric layer parallel to a film surface of the piezoelectric layer and a lattice constant a defined by a crystal plane perpendicular to the film surface satisfy 0.9945?c/a?1.012, and the thickness of the piezoelectric device is twice or more the thickness t (t<5 ?m) of the piezoelectric layer.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: August 27, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Ichiro Asaoka, Hiromu Miyazawa, Masayuki Omoto, Toshiki Hara, Toshihiro Shimizu, Akira Kuriki
  • Publication number: 20190092016
    Abstract: Provided is a liquid ejecting head including a pressure chamber to accommodate a liquid, a vibration plate, a nozzle to eject the liquid, and a piezoelectric element. The piezoelectric element includes a piezoelectric body layer, a first electrode disposed on one surface of the piezoelectric body layer, and a second electrode disposed on the other surface of the piezoelectric body layer. The liquid ejecting head further includes wiring connected to the second electrode and extended along a surface direction of the piezoelectric body layer, and does not include a metal layer having the same potential as the first electrode in a first area which is an area positioned between the wiring and the vibration plate and in which the wiring overlaps with none of the second electrode and the piezoelectric body layer in a direction perpendicular to a surface direction of the second electrode.
    Type: Application
    Filed: September 17, 2018
    Publication date: March 28, 2019
    Inventors: Ichiro ASAOKA, Eiju HIRAI, Tsutomu NISHIWAKI, Hiroshi KATO
  • Publication number: 20190067557
    Abstract: A piezoelectric element including an electrode and a piezoelectric layer provided on the electrode and having a perovskite structure including lead, zirconium, and titanium is provided. A radial distribution function obtained from an extended X-ray absorption fine structure of an L3 absorption edge of lead in an X-ray absorption spectrum of the piezoelectric layer at an interface with the electrode satisfies a formula (1) below A/B?1??(1) (in the formula (1), A represents an intensity of a peak attributable to oxygen atoms closest to lead atoms; and B represents an intensity of a peak attributable to oxygen atoms second closest to the lead atoms).
    Type: Application
    Filed: August 28, 2018
    Publication date: February 28, 2019
    Inventors: Masayuki OMOTO, Ichiro ASAOKA, Hiromu MIYAZAWA
  • Publication number: 20190051461
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Application
    Filed: October 16, 2018
    Publication date: February 14, 2019
    Inventors: Ichiro ASAOKA, Koichi MOROZUMI, Masato SHIMADA, Akira KURIKI
  • Publication number: 20180370236
    Abstract: Provided is a liquid ejecting head that ejects a liquid in a pressure chamber by a piezoelectric device, the piezoelectric device including a vibration plate, a piezoelectric layer containing lead, a first electrode provided between the vibration plate and the piezoelectric layer, and a second electrode provided on a side opposite to a side of the first electrode as viewed from the piezoelectric layer. The piezoelectric layer is preferentially oriented in a (100) plane, a lattice constant c defined by a crystal plane of the piezoelectric layer parallel to a film surface of the piezoelectric layer and a lattice constant a defined by a crystal plane perpendicular to the film surface satisfy 0.9945?c/a?1.012, and the thickness of the piezoelectric device is twice or more the thickness t (t<5 ?m) of the piezoelectric layer.
    Type: Application
    Filed: June 22, 2018
    Publication date: December 27, 2018
    Inventors: Ichiro ASAOKA, Hiromu MIYAZAWA, Masayuki OMOTO, Toshiki HARA, Toshihiro SHIMIZU, Akira KURIKI
  • Patent number: 10134527
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: November 20, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Ichiro Asaoka, Koichi Morozumi, Masato Shimada, Akira Kuriki
  • Patent number: 10096766
    Abstract: A method for evaluating a piezoelectric film containing a perovskite oxide containing a lead atom, a zirconium atom, and a titanium atom, and the method includes a process of irradiating the piezoelectric film with X-rays to acquire an extended X-ray absorption fine structure (EXAFS) spectrum at the L3 absorption edge of the lead atom, a process of Fourier-transforming the extended X-ray absorption fine structure (EXAFS) spectrum to acquire a radial distribution function, and a process of acquiring the intensity of a first peak having a distance from the lead atom of 1.4±0.2 ?, the intensity of a second peak having a distance from the lead atom of 2.0±0.2 ?, and the intensity of a third peak having a distance from the lead atom of 2.6±0.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: October 9, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Masayuki Omoto, Toshiki Hara, Ichiro Asaoka
  • Publication number: 20180145246
    Abstract: A method for evaluating a piezoelectric film containing a perovskite oxide containing a lead atom, a zirconium atom, and a titanium atom, and the method includes a process of irradiating the piezoelectric film with X-rays to acquire an extended X-ray absorption fine structure (EXAFS) spectrum at the L3 absorption edge of the lead atom, a process of Fourier-transforming the extended X-ray absorption fine structure (EXAFS) spectrum to acquire a radial distribution function, and a process of acquiring the intensity of a first peak having a distance from the lead atom of 1.4±0.2 ?, the intensity of a second peak having a distance from the lead atom of 2.0±0.2 ?, and the intensity of a third peak having a distance from the lead atom of 2.6±0.
    Type: Application
    Filed: November 14, 2017
    Publication date: May 24, 2018
    Inventors: Masayuki OMOTO, Toshiki HARA, Ichiro ASAOKA
  • Publication number: 20180065364
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Application
    Filed: November 8, 2017
    Publication date: March 8, 2018
    Inventors: Ichiro ASAOKA, Koichi MOROZUMI, Masato SHIMADA, Akira KURIKI
  • Patent number: 9840077
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: December 12, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Ichiro Asaoka, Koichi Morozumi, Masato Shimada, Akira Kuriki
  • Publication number: 20170266970
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Application
    Filed: June 6, 2017
    Publication date: September 21, 2017
    Inventors: Ichiro ASAOKA, Koichi MOROZUMI, Masato SHIMADA, Akira KURIKI
  • Patent number: 9694580
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: July 4, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Ichiro Asaoka, Koichi Morozumi, Masato Shimada, Akira Kuriki
  • Publication number: 20170057230
    Abstract: An electronic device includes a capacitor that is configured with a first electrode layer, an insulating layer, and a second electrode layer being formed in the order listed herein. At least one end of the capacitor is defined by an end of the second electrode layer. The insulating layer is provided so as to extend to a non-element region that is on the outside of one end of the capacitor. The insulating layer under the non-element region is formed thinner than the insulating layer under the capacitor. A difference between the thickness of the insulating layer under the non-element region and the thickness of the insulating layer under the capacitor is equal to or less than 50 nm.
    Type: Application
    Filed: August 18, 2016
    Publication date: March 2, 2017
    Inventors: Ichiro ASAOKA, Koichi MOROZUMI, Masato SHIMADA, Akira KURIKI
  • Patent number: 9065051
    Abstract: A liquid ejecting head includes a piezoelectric element including a first electrode, a piezoelectric layer overlying the first electrode with an orientation control layer therebetween, and a second electrode overlying the piezoelectric layer. The piezoelectric layer is made of a complex oxide having a perovskite structure including an A site containing lead and a B site containing zirconium and titanium. The orientation control layer is made of a complex oxide having a perovskite structure including an A site containing lanthanum and a B site containing nickel and titanium.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: June 23, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Morozumi, Akira Kuriki, Ichiro Asaoka, Sayaka Kimura