Patents by Inventor Tatsuo Otsuki

Tatsuo Otsuki 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: 6107657
    Abstract: A semiconductor device forming a capacitor through an interlayer insulating layer on a semiconductor substrate on which an integrated circuit is formed. This semiconductor device has an interlayer insulating layer with moisture content of 0.5 g/cm.sup.3 or less, which covers the capacitor in one aspect, and has a passivation layer with hydrogen content of 10.sup.21 atoms/cm.sup.3 or less, which covers the interconnections of the capacitor in other aspect. By thus constituting, deterioration of the capacitor dielectric can be prevented which brings about the electrical reliability of the ferroelectric layer or high dielectric layer.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: August 22, 2000
    Assignee: Matsushita Electronics Corporation
    Inventors: Koji Arita, Eiji Fujii, Yasuhiro Shimada, Yasuhiro Uemoto, Toru Nasu, Akihiro Matsuda, Yoshihisa Nagano, Atsuo Inoue, Taketoshi Matsuura, Tatsuo Otsuki
  • Patent number: 6104049
    Abstract: A coating of liquid precursor containing a metal is applied to a first electrode, baked on a hot plate in oxygen ambient at a temperature not exceeding 300.degree. C. for five minutes, then RTP annealed at 675.degree. C. for 30 seconds. The coating is then annealed in oxygen or nitrogen ambient at 700.degree. C. for one hour to form a thin film of layered superlattice material with a thickness not exceeding 90 nm. A second electrode is applied to form a capacitor, and a post-anneal is performed in oxygen or nitrogen ambient at a temperature not exceeding 700.degree. C. If the material is strontium bismuth tantalate, the precursor contains u mole-equivalents of strontium, v mole-equivalents of bismuth, and w mole-equivalents of tantalum, where 0.8.ltoreq.u.ltoreq.1.0, 2.0.ltoreq.v.ltoreq.2.3, and 1.9.ltoreq.w.ltoreq.2.1.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: August 15, 2000
    Assignee: Symetrix Corporation
    Inventors: Narayan Solayappan, Vikram Joshi, Carlos A. Paz de Araujo, Larry D. McMillan, Shinichiro Hayashi, Tatsuo Otsuki
  • Patent number: 6015987
    Abstract: A semiconductor device forming a capacitor through an interlayer insulating layer on a semiconductor substrate on which an integrated circuit is formed. This semiconductor device has an interlayer insulating layer with moisture content of 0.5 g/cm.sup.3 or less, which covers the capacitor in one aspect, and has a passivation layer with hydrogen content of 10.sup.21 atoms/cm.sup.3 or less, which covers the interconnections of the capacitor in other aspect. By thus constituting, deterioration of the capacitor dielectric can be prevented which brings about the electrical reliability of the ferroelectric layer or high dielectric layer.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: January 18, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Arita, Eiji Fujii, Yasuhiro Shimada, Yasuhiro Uemoto, Toru Nasu, Akihiro Matsuda, Yoshihisa Nagano, Atsuo Inoue, Taketoshi Matsuura, Tatsuo Otsuki
  • Patent number: 5932281
    Abstract: A method of forming a Bi-layered ferroelectric thin film on a substrate with good reproducibility, using a mixed composition of a Bi-containing organic compound and a metal polyalkoxide compound by at least one technique selected from the group consisting of molecular deposition such as CVD, and spincoat-sintering.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: August 3, 1999
    Assignees: Matsushita Electronics Corporation, Kojundo Chemical Laboratory Co., Ltd., Symetrix Corporation
    Inventors: Yukoh Hochido, deceased, Hidekimi Kadokura, Masamichi Matsumoto, Koji Arita, Masamichi Azuma, Tatsuo Otsuki
  • Patent number: 5780351
    Abstract: A semi conductor device forming a capacitor through an interlayer insulating layer on a semiconductor substrate on which an integrated circuit is formed. This semiconductor device has an interlayer insulating layer with moisture content of 0.5 g/cm.sup.3 or less, which covers the capacitor in one aspect, and has a passivation layer with hydrogen content of 10.sup.21 atoms/cm.sup.3 or less, which covers the interconnections of the capacitor in other aspect. By thus constituting, deterioration of the capacitor dielectric can be prevented which brings about the electrical reliability of the ferroelectric layer or high dielectric layer.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: July 14, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Arita, Eiji Fujii, Yasuhiro Shimada, Yasuhiro Uemoto, Toru Nasu, Akihiro Matsuda, Yoshihisa Nagano, Atsuo Inoue, Taketoshi Matsuura, Tatsuo Otsuki
  • Patent number: 5759923
    Abstract: A precursor liquid comprising silicon in a xylenes solvent is prepared, a substrate is placed within a vacuum deposition chamber, the precursor liquid is misted, and the mist is flowed into the deposition chamber while maintaining the chamber at ambient temperature to deposit a layer of the precursor liquid on the substrate. The liquid is dried, baked, and annealed to form a thin film of silicon dioxide or silicon glass on the substrate. Then an integrated circuit is completed to include at least a portion of the silicon dioxide or silicon glass layer as an insulator for an electronic device in the integrated circuit.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: June 2, 1998
    Assignees: Symetrix Corporation, Matsushita Electronics Corporation
    Inventors: Larry D. McMillan, Michael C. Scott, Carlos A. Paz de Araujo, Tatsuo Otsuki, Shinichiro Hayashi
  • Patent number: 5624864
    Abstract: A semiconductor device forming a capacitor through an interlayer insulating layer on a semiconductor substrate on which an integrated circuit is formed. This semiconductor device has an interlayer insulating layer with moisture content of 0.5 g/cm.sup.3 or less, which covers the capacitor in one aspect, and has a passivation layer with hydrogen content of 10.sup.21 atoms/cm.sup.3 or less, which covers the interconnections of the capacitor in other aspect. By thus constituting, deterioration of the capacitor dielectric can be prevented which brings about the electrical reliability of the ferroelectric layer or high dielectric layer.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: April 29, 1997
    Assignee: Matsushita Electronics Corporation
    Inventors: Koji Arita, Eiji Fujii, Yasuhiro Shimada, Yasuhiro Uemoto, Toru Nasu, Akihiro Matsuda, Yoshihisa Nagano, Atsuo Inoue, Taketoshi Matsuura, Tatsuo Otsuki
  • Patent number: 4712023
    Abstract: A buffered FET logic gate circuit has a bias diode (9), which is connected across the gate and the source of a current source FET (4) of a buffer part (3, 4), and a capacitor (8), which is connected across the gate of said FET (4) and an input terminal (V.sub.I); and thereby a high load drivability with a low power consumption rate is realized.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: December 8, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tatsuo Otsuki, Akio Shimano, Hiromitsu Aoki, Ikuko Aoki