Patents by Inventor Mitsuru Hirao

Mitsuru Hirao 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: 6545572
    Abstract: This triplate line interfacial connector electrically connects a first triplate line comprised of a first grounding conductor, first dielectric, first power feeding substrate, second dielectric and second grounding conductor, and a second triplate line comprised of a second grounding conductor, third dielectric, second power feeding substrate, fourth dielectric, and third grounding conductor. A patch pattern is formed at a connecting terminal portion of each power feeding line. Two shield spacers each having a through portion around the patch pattern are provided. A first slot is formed at a connecting position between the two triplate lines in the second grounding conductor.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: April 8, 2003
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Masahiko Ohta, Mitsuru Hirao, Hisayoshi Mizugaki, Takao Michisaka, Kiichi Kanamaru
  • Patent number: 5672897
    Abstract: An improved arrangement is provided for forming a bipolar transistor on a substrate with CMOS elements. All of the transistors (i.e., the bipolar, P-MOS and N-MOS) are formed in regions having gradually decreasing impurity concentrations from the surface toward the substrate. In addition, a buried layer is provided under each of the regions of decreasing impurity concentration in which the transistors are formed. These buried layers have a significantly higher impurity concentration than the portion of the region of decreasing impurity concentration which they are respectively adjacent to. Using this arrangement, punch-through is prevented and excellent electrical operating characteristics are provided for both the bipolar transistors and the CMOS elements.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 30, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Atsuo Watanabe, Takahide Ikeda, Kiyoshi Tsukuda, Mitsuru Hirao, Touji Mukai, Tatsuya Kamei
  • Patent number: 5512497
    Abstract: Disclosed is a bipolar-CMOS LSI manufactured by a simplified process and realizing a higher density of integration as well as a higher operating speed, in which a base lead-out electrode of a bipolar transistor and respective gate electrodes of a p-channel MISFET and an n-channel MISFET of CMOS transistors are made of an identical conductor film, and the conductor film of the gate electrode of the p-channel MISFET is of p-type, while that of the gate electrode of the n-channel MISFET is of n-type.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: April 30, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Takahide Ikeda, Kouichirou Yamada, Osamu Saito, Masanori Odaka, Nobuo Tamba, Katsumi Ogiue, Atsushi Hiraishi, Atsuo Watanabe, Mitsuru Hirao, Akira Fukami, Masayuki Ohayashi, Tadashi Kuramoto
  • Patent number: 5508549
    Abstract: An improved arrangement is provided for forming a bipolar transistor on a substrate with CMOS elements. All of the transistors (i.e., the bipolar, P-MOS and N-MOS) are formed in regions having gradually decreasing impurity concentrations from the surface toward the substrate. In addition, a buried layer is provided under each of the regions of decreasing impurity concentration in which the transistors are formed. These buried layers have a significantly higher impurity concentration than the portion of the region of decreasing impurity concentration which they are respectively adjacent to. Using this arrangement, punch-through is prevented and excellent electrical operating characteristics are provided for both the bipolar transistors and the CMOS elements.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: April 16, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Atsuo Watanabe, Takahide Ikeda, Kiyoshi Tsukuda, Mitsuru Hirao, Touji Mukai, Tatsuya Kamei
  • Patent number: 5354699
    Abstract: Disclosed is a bipolar-CMOS LSI manufactured by a simplified process and realizing a higher density of integration as well as a higher operating speed, in which a base lead-out electrode of a bipolar transistor and respective gate electrodes of a p-channel MISFET and an n-channel MISFET of CMOS transistors are made of an identical conductor film, and the conductor film of the gate electrode of the p-channel MISFET is of p-type, while that of the gate electrode of the n-channel MISFET is of n-type.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: October 11, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Takahide Ikeda, Kouichirou Yamada, Osamu Saito, Masanori Odaka, Nobuo Tamba, Katsumi Ogiue, Atsushi Hiraishi, Atsuo Watanabe, Mitsuru Hirao, Akira Fukami, Masayuki Ohayashi, Tadashi Kuramoto
  • Patent number: 5144394
    Abstract: The structure of a MOSFET and a method for fabricating the same is disclosed, with which it is possible to increase the driving capacity. Heretofore there was a problem that no measures were taken against the decrease in the channel width due to bird's beaks produced at the formation of a field oxide film and that the channel width at the completion of the manufacturing process was smaller than that foreseen during the design of the device. To overcome this problem, a MOSFET is provided in which the junction of the source or the drain is extended up to the end portions in the channel direction so that the effective channel width is determined by the width of the junction on the sides, where the junction is not extended up to the end portions in the channel direction.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: September 1, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuru Hirao, Masataka Minami, Shoji Shukuri
  • Patent number: 5072286
    Abstract: A semiconductor memory device has memory cells each including first and second inverters cross-coupled to each other through first and second interconnecting conductors for forming a bistable circuit and first and second transfer gates connected between the first inverter and address signal conductors and between the second inverter and the address signal conductors, respectively. The first and second interconnecting conductors are arranged substantially point-symmetrically and have at least portions substantially parallel with each other on a surface of a substrate, and IG FETs constituting the first and second inverters have their gate electrodes arranged substantially parallel with one another and extending in a direction substantially perpendicular to the parallel portions of the first and second interconnecting conductors for the cross-coupling on the surface of the substrate.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: December 10, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Masataka Minami, Shoji Shukuri, Mitsuru Hirao, Toshiaki Yamanaka
  • Patent number: 5057894
    Abstract: Disclosed is a bipolar-CMOS LSI manufactured by a simplified process and realizing a higher density of integration as well as a higher operating speed, in which a base lead-out electrode of a bipolar transistor and respective gate electrodes of a p-channel MISFET and an n-channel MISFET of CMOS transistors are made of an identical conductor film, and the conductor film of the gate electrode of the p-channel MISFET is of p-type, while that of the gate electrode of the n-channel MISFET is of n-type.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: October 15, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Takahide Ikeda, Kouichirou Yamada, Osamu Saito, Masanori Odaka, Nobuo Tamba, Katsumi Ogiue, Atsushi Hiraishi, Atsuo Watanabe, Mitsuru Hirao, Akira Fukami, Masayuki Ohayashi, Tadashi Kuramoto
  • Patent number: 5049967
    Abstract: An improved arrangement is provided for forming a bipolar transistor on a substrate with CMOS elements. All of the transistors (i.e., the bipolar, P-MOS and N-MOS) are formed in regions having gradually decreasing impurity concentrations from a surface toward the substrate. In addition, a buried layer is provided under each of the regions of decreasing impurity concentration in which the transistors are formed. These buried layers have a significantly higher impurity concentration than the portion of the region of decreasing impurity concentration which they are respectively adjacent to. Using this arrangement, punch-through is prevented and excellent electrical operating characteristics are provided for both the bipolar transistors and the CMOS elements.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: September 17, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Atsuo Watanabe, Takahide Ikeda, Kiyoshi Tsukuda, Mitsuru Hirao, Touji Mukai, Tatsuya Kamei
  • Patent number: 4984200
    Abstract: Herein disclosed is a semiconductor integrated circuit device comprising a SRAM which is composed of a memory cell having its high resistance load element and power source voltage line connected with the information storage node of a flip-flop circuit through a conductive layer. At the same fabrication step as that of forming the plate electrode layer of a capacity element over the conductive layer formed on the portion of the information storage node through a dielectric film, an electric field shielding film for shielding the field effect of a data line is formed over the high resistance load element through an inter-layer insulation film.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: January 8, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Ryuichi Saitoo, Osamu Saitoo, Takahide Ikeda, Mitsuru Hirao, Atsushi Hiraishi
  • Patent number: 4980744
    Abstract: An improved arrangement is provided for forming a bipolar transistor on a substrate with CMOS elements. All of the transistors (i.e., the bipolar, P-MOS and N-MOS) are formed in regions having gradually decreasing impurity concentrations from the surface toward the substrate. In addition, a buried layer is provided under each of the regions of decreasing impurity concentration in which the transistors are formed. These buried layers have a significantly higher impurity concentration than the portion of the region of decreasing impurity concentration which they are respectively adjacent to. Using this arrangement, punch-through is prevented and excellent electrical operating characteristics are provided for both the bipolar transistors and the CMOS elements.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: December 25, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Atsuo Watanabe, Takahide Ikeda, Kiyoshi Tsukuda, Mitsuru Hirao, Touji Mukai, Tatsuya Kamei
  • Patent number: 4921811
    Abstract: An improved arrangement is provided for forming a bipolar transistor on a substrate with CMOS elements. All of the transistors (i.e., the bipolar, P-MOS and N-MOS) are formed in regions having gradually decreasing impurity concentrations from the surface toward the substrate. In addition, a buried layer is provided under each of the regions of decreasing impurity concentration in which the transistors are formed. These buried layers have a significantly higher impurity concentration than the portion of the region of decreasing impurity concentration which they are respectively adjacent to. Using this arrangement, punch-through is prevented and excellent electrical operating characteristics are provided for both the bipolar transistors and the CMOS elements.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: May 1, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Atsuo Watanabe, Takahide Ikeda, Kiyoshi Tsukuda, Mitsuru Hirao, Touji Mukai, Tatsuya Kamei