Patents by Inventor Akiko Murata

Akiko Murata 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: 20100172025
    Abstract: A second region (12) composed of a plane is formed around a first region (11) having a lens function, and a third region (13) is formed between the first region and the second region. A protection film (24) is formed on the surface of the first region 1. The first region is protruded relative to the second region, the third region is formed throughout the rim of the first region 1, and the surface of the third region is recessed relative to a virtual curved surface (11a) that is a curved surface along the surface shape of the first region being extended to the second region. Consequently, it is possible to form throughout the first region a protection film having a surface shape that substantially matches the surface shape of the first region.
    Type: Application
    Filed: July 14, 2008
    Publication date: July 8, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Norihisa Takahara, Yuka Okada, Akiko Murata
  • Publication number: 20100027121
    Abstract: A lens according to the present invention includes at least one first area (11) including a lens portion (11a) with a convex shape, and a second area (12) surrounding the first area (11). A groove (13) surrounding the first area (11) is formed between the first area (11) and the second area (12). A coating layer (14) is formed on the lens portion (11a).
    Type: Application
    Filed: December 11, 2007
    Publication date: February 4, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Norihisa Takahara, Takashi Ohta, Yuka Okada, Akiko Murata
  • Patent number: 7478558
    Abstract: In a piezoelectric element, an adhesive layer 12 is provided on a substrate 11, a first electrode layer 14 made of a noble metal containing titanium or titanium oxide is provided on the adhesive layer 12, and an orientation control layer 15 that is preferentially oriented along a (100) or (001) plane is provided on the first electrode layer 14. In the vicinity of a surface of the orientation control layer 15 that is closer to the first electrode layer 14, a (100)- or (001)-oriented region extends over titanium or titanium oxide located on one surface of the first electrode layer 14 that is closer to the orientation control layer 15, and the cross-sectional area of the region in the direction perpendicular to the thickness direction gradually increases in the direction away from the first electrode layer 14 toward the opposite side. Further, a piezoelectric layer 16 that is preferentially oriented along a (001) plane is provided on the orientation control layer 15.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: January 20, 2009
    Assignee: Panasonic Corporation
    Inventors: Eiji Fujii, Hideo Torii, Ryoichi Takayama, Atsushi Tomozawa, Akiko Murata, Taku Hirasawa
  • Patent number: 7193756
    Abstract: A piezoelectric element includes a first electrode film; a piezoelectric layered film including a first piezoelectric thin film formed on the first electrode film and a second piezoelectric thin film formed on the first piezoelectric thin film; and a second electrode film formed on the second piezoelectric thin film. Each of the first and second piezoelectric thin films is an aggregate of columnar grains grown unidirectionally along the thickness direction of the piezoelectric layered film. The Pb content of the first piezoelectric thin film is smaller than the Pb content of the second piezoelectric thin film. A columnar grain of the second piezoelectric thin film has a larger average cross-sectional diameter than an average cross-sectional diameter of a columnar grain of the first piezoelectric thin film. A ratio of the thickness of the piezoelectric layered film to the average cross-sectional diameter of the second piezoelectric thin film is not less than 20 and not more than 60.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: March 20, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akiko Murata, Eiji Fujii, Hideo Torii
  • Patent number: 7185540
    Abstract: In a piezoelectric element 20, a first electrode layer 2 made of an alloy of at least one metal selected from the group consisting of cobalt, nickel, iron, manganese and copper and a noble metal is formed on a silicon substrate 1, and a piezoelectric layer 3 made of a rhombohedral or tetragonal perovskite oxide (e.g., PZT) is formed on the first electrode layer 2 so that the piezoelectric layer 3 is preferentially oriented along the (001) plane.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: March 6, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Torii, Eiji Fujii, Atsushi Tomozawa, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Patent number: 7131173
    Abstract: First, a first electrode layer 4, a piezoelectric layer 5, a second electrode layer 6 and an oscillation layer 7 are stacked in this order over one surface of a silicon substrate 1. Next, an ink chamber partition 8 and a nozzle plate 11 are stacked over the oscillation layer 7. Subsequently, the silicon substrate 1 is ground away to a predetermined thickness from a surface thereof opposite to the first electrode layer 4, and then a remnant silicon substrate 13 is dry etched away. Thereafter, the first electrode layer 4 is patterned to form a plurality of inkjet mechanisms 2, 2, . . . . Finally, the plurality of inkjet mechanisms 2, 2, . . . are divided to simultaneously fabricate a plurality of inkjet heads 3, 3, . . . .
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: November 7, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taku Hirasawa, Akiko Murata, Eiji Fujii, Hideo Torii, Tohru Nakagawa
  • Publication number: 20060187272
    Abstract: In a piezoelectric element 20, a first electrode layer 2 made of an alloy of at least one metal selected from the group consisting of cobalt, nickel, iron, manganese and copper and a noble metal is formed on a silicon substrate 1, and a piezoelectric layer 3 made of a rhombohedral or tetragonal perovskite oxide (e.g., PZT) is formed on the first electrode layer 2 so that the piezoelectric layer 3 is preferentially oriented along the (001) plane.
    Type: Application
    Filed: April 21, 2006
    Publication date: August 24, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Torii, Eiji Fujii, Atsushi Tomozawa, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Patent number: 7083270
    Abstract: In a piezoelectric element 20, a first electrode layer 2 made of an alloy of at least one metal selected from the group consisting of cobalt, nickel, iron, manganese and copper and a noble metal is formed on a silicon substrate 1, and a piezoelectric layer 3 made of a rhombohedral or tetragonal perovskite oxide (e.g., PZT) is formed on the first electrode layer 2 so that the piezoelectric layer 3 is preferentially oriented along the (001) plane.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: August 1, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideo Torii, Eiji Fujii, Atsushi Tomozawa, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Publication number: 20060146097
    Abstract: In a piezoelectric element, an adhesive layer 12 is provided on a substrate 11, a first electrode layer 14 made of a noble metal containing titanium or titanium oxide is provided on the adhesive layer 12, and an orientation control layer 15 that is preferentially oriented along a (100) or (001) plane is provided on the first electrode layer 14. In the vicinity of a surface of the orientation control layer 15 that is closer to the first electrode layer 14, a (100)- or (001)-oriented region extends over titanium or titanium oxide located on one surface of the first electrode layer 14 that is closer to the orientation control layer 15, and the cross-sectional area of the region in the direction perpendicular to the thickness direction gradually increases in the direction away from the first electrode layer 14 toward the opposite side. Further, a piezoelectric layer 16 that is preferentially oriented along a (001) plane is provided on the orientation control layer 15.
    Type: Application
    Filed: February 24, 2006
    Publication date: July 6, 2006
    Inventors: Eiji Fujii, Hideo Torii, Ryoichi Takayama, Atsushi Tomozawa, Akiko Murata, Taku Hirasawa
  • Patent number: 7033001
    Abstract: In a piezoelectric element, an adhesive layer 12 is provided on a substrate 11, a first electrode layer 14 made of a noble metal containing titanium or titanium oxide is provided on the adhesive layer 12, and an orientation control layer 15 that is preferentially oriented along a (100) or (001) plane is provided on the first electrode layer 14. In the vicinity of a surface of the orientation control layer 15 that is closer to the first electrode layer 14, a (100)- or (001)-oriented region extends over titanium or titanium oxide located on one surface of the first electrode layer 14 that is closer to the orientation control layer 15, and the cross-sectional area of the region in the direction perpendicular to the thickness direction gradually increases in the direction away from the first electrode layer 14 toward the opposite side. Further, a piezoelectric layer 16 that is preferentially oriented along a (001) plane is provided on the orientation control layer 15.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: April 25, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Eiji Fujii, Hideo Torii, Ryoichi Takayama, Atsushi Tomozawa, Akiko Murata, Taku Hirasawa
  • Publication number: 20050280335
    Abstract: A piezoelectric element includes a first electrode layer 14 provided on a substrate 11 and made of a noble metal to which at least one additive selected from the group consisting of Mg, Ca, Sr, Ba, Al and oxides thereof is added, an orientation control layer 15 provided on the first electrode layer 14 and made of a cubic or tetragonal perovskite oxide that is preferentially oriented along a (100) or (001) plane, and a piezoelectric layer 16 provided on the orientation control layer 15 and made of a rhombohedral or tetragonal perovskite oxide that is preferentially oriented along a (001) plane.
    Type: Application
    Filed: August 15, 2005
    Publication date: December 22, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushi Tomozawa, Eiji Fujii, Hideo Torii, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Patent number: 6969157
    Abstract: A piezoelectric element includes a first electrode layer 14 provided on a substrate 11 and made of a noble metal to which at least one additive selected from the group consisting of Mg, Ca, Sr, Ba, Al and oxides thereof is added, an orientation control layer 15 provided on the first electrode layer 14 and made of a cubic or tetragonal perovskite oxide that is preferentially oriented along a (100) or (001) plane, and a piezoelectric layer 16 provided on the orientation control layer 15 and made of a rhombohedral or tetragonal perovskite oxide that is preferentially oriented along a (001) plane.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: November 29, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushi Tomozawa, Eiji Fujii, Hideo Torii, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Publication number: 20050168535
    Abstract: First, a first electrode layer 4, a piezoelectric layer 5, a second electrode layer 6 and an oscillation layer 7 are stacked in this order over one surface of a silicon substrate 1. Next, an ink chamber partition 8 and a nozzle plate 11 are stacked over the oscillation layer 7. Subsequently, the silicon substrate 1 is ground away to a predetermined thickness from a surface thereof opposite to the first electrode layer 4, and then a remnant silicon substrate 13 is dry etched away. Thereafter, the first electrode layer 4 is patterned to form a plurality of inkjet mechanisms 2, 2, . . . . Finally, the plurality of inkjet mechanisms 2, 2, . . . are divided to simultaneously fabricate a plurality of inkjet heads 3, 3, . . . .
    Type: Application
    Filed: December 8, 2003
    Publication date: August 4, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taku Hirasawa, Akiko Murata, Eiji Fujii, Hideo Torii, Tohru Nakagawa
  • Publication number: 20050146772
    Abstract: A piezoelectric element includes a first electrode film; a piezoelectric layered film including a first piezoelectric thin film formed on the first electrode film and a second piezoelectric thin film formed on the first piezoelectric thin film; and a second electrode film formed on the second piezoelectric thin film. Each of the first and second piezoelectric thin films is an aggregate of columnar grains grown unidirectionally along the thickness direction of the piezoelectric layered film. The Pb content of the first piezoelectric thin film is smaller than the Pb content of the second piezoelectric thin film. A columnar grain of the second piezoelectric thin film has a larger average cross-sectional diameter than an average cross-sectional diameter of a columnar grain of the first piezoelectric thin film. A ratio of the thickness of the piezoelectric layered film to the average cross-sectional diameter of the second piezoelectric thin film is not less than 20 and not more than 60.
    Type: Application
    Filed: November 24, 2004
    Publication date: July 7, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akiko Murata, Eiji Fujii, Hideo Torii
  • Patent number: 6886922
    Abstract: In the liquid discharge head for discharging liquid such as ink like the ink jet head, at least a part on a surface of a piezoelectric element on the side of a liquid chamber member (ink chamber member) is composed of a nucleus forming assistance material contained layer containing a material for assisting nucleus forming for growth of plating at the time of forming the liquid chamber member on the surface by means of the electroless plating, and the liquid chamber member is formed on the nucleus forming assistance material contained layer by the electroless plating.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: May 3, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taku Hirasawa, Akiko Murata, Atsushi Tomozawa, Eiji Fujii, Hideo Torii, Ryoichi Takayama
  • Publication number: 20040104981
    Abstract: In a piezoelectric element, an adhesive layer 12 is provided on a substrate 11, a first electrode layer 14 made of a noble metal containing titanium or titanium oxide is provided on the adhesive layer 12, and an orientation control layer 15 that is preferentially oriented along a (100) or (001) plane is provided on the first electrode layer 14. In the vicinity of a surface of the orientation control layer 15 that is closer to the first electrode layer 14, a (100)- or (001)-oriented region extends over titanium or titanium oxide located on one surface of the first electrode layer 14 that is closer to the orientation control layer 15, and the cross-sectional area of the region in the direction perpendicular to the thickness direction gradually increases in the direction away from the first electrode layer 14 toward the opposite side. Further, a piezoelectric layer 16 that is preferentially oriented along a (001) plane is provided on the orientation control layer 15.
    Type: Application
    Filed: September 18, 2003
    Publication date: June 3, 2004
    Inventors: Eiji Fujii, Hideo Torii, Ryoichi Takayama, Atsushi Tomozawa, Akiko Murata, Taku Hirasawa
  • Publication number: 20040017442
    Abstract: In the liquid discharge head for discharging liquid such as ink like the ink jet head, at least a part on a surface of a piezoelectric element on the side of a liquid chamber member (ink chamber member) is composed of a nucleus forming assistance material contained layer containing a material for assisting nucleus forming for growth of plating at the time of forming the liquid chamber member on the surface by means of the electroless plating, and the liquid chamber member is formed on the nucleus forming assistance material contained layer by the electroless plating.
    Type: Application
    Filed: June 26, 2003
    Publication date: January 29, 2004
    Inventors: Taku Hirasawa, Akiko Murata, Atsushi Tomozawa, Eiji Fujii, Hideo Torii, Ryoichi Takayama
  • Publication number: 20030234835
    Abstract: In a piezoelectric element 20, a first electrode layer 2 made of an alloy of at least one metal selected from the group consisting of cobalt, nickel, iron, manganese and copper and a noble metal is formed on a silicon substrate 1, and a piezoelectric layer 3 made of a rhombohedral or tetragonal perovskite oxide (e.g., PZT) is formed on the first electrode layer 2 so that the piezoelectric layer 3 is preferentially oriented along the (001) plane.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 25, 2003
    Inventors: Hideo Torii, Eiji Fujii, Atsushi Tomozawa, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Publication number: 20030222947
    Abstract: A piezoelectric element includes a first electrode layer 14 provided on a substrate 11 and made of a noble metal to which at least one additive selected from the group consisting of Mg, Ca, Sr, Ba, Al and oxides thereof is added, an orientation control layer 15 provided on the first electrode layer 14 and made of a cubic or tetragonal perovskite oxide that is preferentially oriented along a (100) or (001) plane, and a piezoelectric layer 16 provided on the orientation control layer 15 and made of a rhombohedral or tetragonal perovskite oxide that is preferentially oriented along a (001) plane.
    Type: Application
    Filed: May 23, 2003
    Publication date: December 4, 2003
    Inventors: Atsushi Tomozawa, Eiji Fujii, Hideo Torii, Akiko Murata, Ryoichi Takayama, Taku Hirasawa
  • Patent number: 6288767
    Abstract: An imaging optical system includes a liquid crystal lens including a first body formed of a substantially transparent birefringent liquid crystal member, a second body formed of a substantially transparent birefringent liquid crystal member, and two pairs of electrodes for adding an electric field or a magnetic field onto the first body and the second body. A rear face of the first body is aligned perpendicular to a front face of the second body, the first body and the second body have substantially symmetrical shape against a plane perpendicular to an optical axis and a plurality of optical elements are arranged front and after the liquid crystal lens. The liquid crystal lens has two distinct focal points. The system automatically switches between these focal points, based on the position of the lens with respect to the object being observed.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: September 11, 2001
    Assignee: Olympus Optical Company, LTD
    Inventors: Akiko Murata, Katsuya Ono