Patents by Inventor Takeshi Kijima

Takeshi Kijima 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: 7956519
    Abstract: A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: June 7, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Eiji Natori, Takeshi Kijima, Koichi Furuyama, Yuzo Tasaki
  • Patent number: 7914130
    Abstract: A droplet ejection device includes: a substrate having first, second, third & fourth pressure chambers extending in a first direction; a nozzle plate below the substrate & having first, second, third & fourth nozzle apertures continuous with first, second, third & forth pressure chambers, respectively; a vibration plate above the substrate; first, second, third & fourth piezoelectric elements above the vibration plate & above first, second, third & fourth pressure chambers.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: March 29, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Kijima, Shoichi Iino
  • Patent number: 7867472
    Abstract: An insulating target material for obtaining a conductive complex oxide film represented by a general formula ABO3. The insulating target material includes: an oxide of an element A; an oxide of an element B; an oxide of an element X; and at least one of an Si compound and a Ge compound, the element A being at least one element selected from La, Ca, Sr, Mn, Ba, and Re, the element B being at least one element selected from Ti, V, Sr, Cr, Fe, Co, Ni, Cu, Ru, Ir, Pb, and Nd, and the element X being at least one element selected from Nb, Ta, and V.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: January 11, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Koji Ohashi, Takeshi Kijima, Setsuya Iwashita
  • Patent number: 7847372
    Abstract: A ferroelectric capacitor including: a substrate; a first electrode formed above the substrate; a first ferroelectric layer formed above the first electrode and including a complex oxide shown by Pb(Zr,Ti)O3; a second ferroelectric layer formed above the first ferroelectric layer and including a complex oxide shown by Pb(Zr,Ti)1-xNbxO3; and a second electrode formed above the second ferroelectric layer.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: December 7, 2010
    Assignee: Seiko Epson Corporation
    Inventor: Takeshi Kijima
  • Publication number: 20100289384
    Abstract: A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
    Type: Application
    Filed: April 26, 2010
    Publication date: November 18, 2010
    Applicant: Seiko Epson Corporation
    Inventors: Eiji Natori, Takeshi Kijima, Koichi Furuyama, Yuzo Tasaki
  • Patent number: 7825569
    Abstract: A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: November 2, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Eiji Natori, Takeshi Kijima, Koichi Furuyama, Yuzo Tasaki
  • Publication number: 20100207492
    Abstract: A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
    Type: Application
    Filed: April 26, 2010
    Publication date: August 19, 2010
    Applicant: Seiko Epson Corporation
    Inventors: Eiji Natori, Takeshi Kijima, Koichi Furuyama, Yuzo Tasaki
  • Patent number: 7731933
    Abstract: An insulating target material for obtaining an insulating complex oxide film represented by a general formula AB1-XCXO3, an element A including at least Pb, an element B including at least one of Zr, Ti, V, W, and Hf, and an element C including at least one of Nb and Ta.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: June 8, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Kijima, Takamitsu Higuchi
  • Patent number: 7718487
    Abstract: A method of manufacturing a ferroelectric layer, including: forming a first ferroelectric layer above a base by a vapor phase method; and forming a second ferroelectric layer above the first ferroelectric layer by a liquid phase method.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: May 18, 2010
    Assignee: Seiko Epson Corporation
    Inventor: Takeshi Kijima
  • Patent number: 7713348
    Abstract: A precursor composition including a precursor for forming a ferroelectric, the ferroelectric being shown by a general formula AB1-XCXO3, an element A including at least Pb, an element B including at least one of Zr, Ti, V, W, and Hf, an element C including at least one of Nb and Ta, the precursor including at least the element B and the element C and part of the precursor including an ester bond, the precursor being dissolved or dispersed in an organic solvent, and the organic solvent including at least a first alcohol and a second alcohol having a boiling point and viscosity higher than a boiling point and viscosity of the first alcohol.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: May 11, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Kijima, Setsuya Iwashita, Yasuaki Hamada
  • Patent number: 7710004
    Abstract: An insulating target material for obtaining a conductive complex oxide film represented by a general formula ABO3, the insulating target material including an oxide of an element A, an oxide of an element B, and at least one of an Si compound and a Ge compound.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: May 4, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Koji Ohashi, Setsuya Iwashita, Takeshi Kijima, Yasuaki Hamada
  • Patent number: 7678241
    Abstract: The invention provides a film forming apparatus that is capable of forming films sequentially with two types of film forming mechanisms in the same chamber. The film forming apparatus according to the present invention includes a Pt target disposed at one side within a film forming chamber, a sputtering output mechanism to supply to the Pt target, a Pt vapor deposition source disposed at an other side within the film forming chamber, a vapor deposition output mechanism to supply to the Pt vapor deposition source, a substrate holder disposed between the Pt target and the Pt vapor deposition source within the film forming chamber to mount a substrate, a rotating mechanism to move the substrate holder so that the substrate directs to the Pt target or to the Pt vapor deposition source, a heating mechanism to heat the substrate when the substrate is subjected to a sputtering film forming, and a cooling mechanism to cool the substrate when the substrate is subjected to vapor deposition film forming.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: March 16, 2010
    Assignees: Seiko Epson Corporation, Youtec Co., Ltd.
    Inventors: Takeshi Kijima, Eiji Natori, Mitsuhiro Suzuki
  • Publication number: 20100013894
    Abstract: A piezoelectric laminate including a base and a first piezoelectric layer formed above the base and including potassium sodium niobate. The first piezoelectric layer is shown by a compositional formula (KaNa1-a)xNbO3, “a” and “x” in the compositional formula being respectively 0.1<a<1 and 1?x?1.2.
    Type: Application
    Filed: September 9, 2009
    Publication date: January 21, 2010
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Mayumi Ueno, Takamitsu Higuchi, Takeshi Kijima
  • Patent number: 7622850
    Abstract: A piezoelectric device includes: a substrate; a first conductive layer formed over the substrate, the first conductive layer including at least one buffer layer formed of a (001) preferentially oriented lanthanum-based layered perovskite compound; a piezoelectric layer formed over the first conductive layer and including a piezoelectric having a perovskite structure; and a second conductive layer electrically connected with the piezoelectric layer.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: November 24, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Setsuya Iwashita, Takeshi Kijima, Koji Ohashi
  • Patent number: 7601387
    Abstract: A piezoelectric film laminate including a sapphire substrate and a lead zirconate titanate niobate film and a potassium niobate film formed on the sapphire substrate.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: October 13, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Takamitsu Higuchi, Takeshi Kijima, Mayumi Ueno
  • Patent number: 7597813
    Abstract: A method of manufacturing an element substrate including: forming a release layer on a first support substrate; forming a metal layer having a predetermined pattern on the release layer; disposing a second support substrate on the first support substrate so that the metal layer is interposed between the first and second support substrates; pouring a resin material in a fluid state between the first and second support substrates; curing the resin material to form a resin substrate; and removing the metal layer from the first support substrate by decomposing the release layer to transfer the metal layer to the resin substrate.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: October 6, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Toshihiko Kaneda, Satoshi Kimura, Hidemichi Furihata, Takeshi Kijima
  • Publication number: 20090243438
    Abstract: A piezoelectric element includes a first electrode, a piezoelectric film disposed on the first electrode, and a second electrode disposed on the piezoelectric film. The piezoelectric film is composed of piezoelectric material that is lead free and formed by mixing 100(1?x)% of material A having a spontaneous polarization of 0.5 C/m2 or greater at 25° C. and 100 x % of material B having piezoelectric characteristics and a dielectric constant of 1000 or greater at 25° C., wherein (1?x)Tc(A)+xTc(B)?300° C., where Tc(A) is the Curie temperature of the material A and Tc(B) is the Curie temperature of the material B.
    Type: Application
    Filed: March 30, 2009
    Publication date: October 1, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yasuaki HAMADA, Takeshi KIJIMA
  • Publication number: 20090246360
    Abstract: An oxide source material solution for forming an oxide film having a composition expressed by PbuZrxTi1-x-yMyO3 is presented. A composition of metal element constituents in the oxide source material solution is expressed by [Pb]:([Zr]+[Ti]+[M])=v:1, and a difference (v?u) in composition ratio of Pb between the oxide source material solution and the oxide film is 0.01 or less.
    Type: Application
    Filed: March 30, 2009
    Publication date: October 1, 2009
    Applicant: Seiko Epson Corporation
    Inventors: Yasuaki HAMADA, Takeshi KIJIMA
  • Publication number: 20090230346
    Abstract: A piezoelectric body includes a perovskite type compound that is expressed by a compositional formula being Pb (Zrx Ti1-x)1-y My O3, where M is at least one of Ta and Nb, x is in a range of 0.51?x?0.57, and y is in a range of 0.05?y<0.2, wherein the perovskite type compound contains at least one of SiO2 and GeO2 as an additive, and the additive is added in an amount of 0.5 mol % or higher but 5 mol % or lower with respect to the amount of perovskite type compound.
    Type: Application
    Filed: March 12, 2009
    Publication date: September 17, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yasuaki HAMADA, Akio KONISHI, Takeshi KIJIMA
  • Publication number: 20090230821
    Abstract: A method of manufacturing a ceramic includes forming a film which includes a complex oxide material having an oxygen octahedral structure and a paraelectric material having a catalytic effect for the complex oxide material in a mixed state, and performing a heat treatment to the film, wherein the paraelectric material is one of a layered catalytic substance which includes Si in the constituent elements and a layered catalytic substance which includes Si and Ge in the constituent elements. The heat treatment includes sintering and post-annealing. At least the post-annealing is performed in a pressurized atmosphere including at least one of oxygen and ozone. A ceramic is a complex oxide having an oxygen octahedral structure, and has Si and Ge in the oxygen octahedral structure.
    Type: Application
    Filed: April 10, 2009
    Publication date: September 17, 2009
    Applicant: Seiko Epson Corporation
    Inventors: Eiji Natori, Takeshi Kijima, Koichi Furuyama, Yuzo Tasaki