Patents by Inventor Hiroaki Takasu

Hiroaki Takasu 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: 11894364
    Abstract: A semiconductor device has an off transistor (10) in which a gate electrode (3) and a source region (6) of an N-type MOS transistor are connected to a ground terminal and a drain region (5) is connected to an external signal terminal (100b). In the off transistor (10), the gate electrode (3) is extensively provided over a portion or entirety of the drain region (5) in addition to a channel region. A capacitance (C2) formed between the gate electrode (3) and the drain region (5) may be greater than a capacitance (C1) generated between the gate electrode (3) and a ground potential.
    Type: Grant
    Filed: January 11, 2022
    Date of Patent: February 6, 2024
    Assignee: ABLIC Inc.
    Inventor: Hiroaki Takasu
  • Patent number: 11631620
    Abstract: Provided is a semiconductor device that allows reduction of a measurement time of a PCMTEG and improvement of productivity in an IC manufacturing process. A PCMTEG region 100 formed on a surface of a semiconductor substrate is divided into a main PCMTEG region 101 and a sub-PCMTEG region 102, and TEGs having specifications for their electrical characteristic values are all collectively arranged in the sub-PCMTEG region 102.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: April 18, 2023
    Assignee: ABLIC INC.
    Inventors: Hiroaki Takasu, Yoko Serizawa, Hiroya Suzuki, Sumitaka Goto
  • Publication number: 20230010077
    Abstract: A method of manufacturing a semiconductor device includes: forming a base oxide film on a surface of a silicon semiconductor substrate (P-type well region); forming a thick film portion provided along a boundary C between an activation region A and an element isolation region B and having at least a predetermined width W from the boundary C toward the element isolation region B and a thin film portion having a film thickness smaller than a film thickness ta of the thick film portion in the activation region A and the element isolation region B other than the thick film portion on the base oxide film; forming a silicon nitride film on surfaces of the thick film portion and the thin film portion; and selectively removing the silicon nitride film in the element isolation region B through an over-etching process.
    Type: Application
    Filed: May 26, 2022
    Publication date: January 12, 2023
    Inventors: Riki NAGASAWA, Hiroaki TAKASU, Osamu KARIKOME
  • Publication number: 20220238510
    Abstract: A semiconductor device has an off transistor (10) in which a gate electrode (3) and a source region (6) of an N-type MOS transistor are connected to a ground terminal and a drain region (5) is connected to an external signal terminal (100b). In the off transistor (10), the gate electrode (3) is extensively provided over a portion or entirety of the drain region (5) in addition to a channel region. A capacitance (C2) formed between the gate electrode (3) and the drain region (5) may be greater than a capacitance (C1) generated between the gate electrode (3) and a ground potential.
    Type: Application
    Filed: January 11, 2022
    Publication date: July 28, 2022
    Applicant: ABLIC Inc.
    Inventor: Hiroaki TAKASU
  • Patent number: 11386354
    Abstract: A plurality of feature values are extracted from input data as document data, distributed representations of words that correspond to the respective extracted plurality of feature values is obtained, and the extracted plurality of feature values are aggregated into a plurality of classifications based on the obtained distributed representation.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: July 12, 2022
    Assignee: NS SOLUTIONS CORPORATION
    Inventors: Isao Sonobe, Takashi Mitsubuchi, Hideaki Tanaka, Hiroaki Takasu, Kazuhiro Yamada, Yasuhiro Mitsuno
  • Patent number: 11139366
    Abstract: A thin film resistor includes a high-resistance region and low-resistance regions which are formed at both ends of the high-resistance region. The high-resistance region includes first high-resistance regions and a second high-resistance region, and the first high-resistance regions are arranged at both side surfaces in a first direction in the second high-resistance region. The second high-resistance region has a higher sheet resistance than that of the first high-resistance regions.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: October 5, 2021
    Assignee: ABLIC INC.
    Inventor: Hiroaki Takasu
  • Patent number: 11011480
    Abstract: Provided is a semiconductor device capable of improving relative accuracy of semiconductor elements and a yield of a semiconductor integrated circuit device. The semiconductor device includes a flat region formed on a surface of a semiconductor substrate, and having an outer peripheral shape formed by regional sides and regional chamfer portions; an outer peripheral region surrounding the flat region, and having a uniform height different from a height of the flat region; a plurality of semiconductor elements having similar shapes or the same shape, and formed on the flat region; and a wiring metal connecting the plurality of semiconductor elements via contact holes formed in a second insulating film on the semiconductor elements.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: May 18, 2021
    Assignee: ABLIC INC.
    Inventor: Hiroaki Takasu
  • Publication number: 20210013114
    Abstract: Provided is a semiconductor device that allows reduction of a measurement time of a PCMTEG and improvement of productivity in an IC manufacturing process. A PCMTEG region 100 formed on a surface of a semiconductor substrate is divided into a main PCMTEG region 101 and a sub-PCMTEG region 102, and TEGs having specifications for their electrical characteristic values are all collectively arranged in the sub-PCMTEG region 102.
    Type: Application
    Filed: July 8, 2020
    Publication date: January 14, 2021
    Inventors: Hiroaki TAKASU, Yoko SERIZAWA, Hiroya SUZUKI, Sumitaka GOTO
  • Publication number: 20200295124
    Abstract: A thin film resistor includes a high-resistance region and low-resistance regions which are formed at both ends of the high-resistance region. The high-resistance region includes first high-resistance regions and a second high-resistance region, and the first high-resistance regions are arranged at both side surfaces in a first direction in the second high-resistance region. The second high-resistance region has a higher sheet resistance than that of the first high-resistance regions.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 17, 2020
    Inventor: Hiroaki TAKASU
  • Publication number: 20200293553
    Abstract: A plurality of feature values are extracted from input data as document data, distributed representations of words that correspond to the respective extracted plurality of feature values is obtained, and the extracted plurality of feature values are aggregated into a plurality of classifications based on the obtained distributed representation.
    Type: Application
    Filed: June 12, 2018
    Publication date: September 17, 2020
    Inventors: Isao SONOBE, Takashi MISUBUCHI, Hideaki TANAKA, Hiroaki takasu, Kazuhiro YAMADA, Yasuhiro MITSUNO
  • Publication number: 20200006260
    Abstract: Provided is a semiconductor device capable of improving relative accuracy of semiconductor elements and a yield of a semiconductor integrated circuit device. The semiconductor device includes a flat region formed on a surface of a semiconductor substrate, and having an outer peripheral shape formed by regional sides and regional chamfer portions; an outer peripheral region surrounding the flat region, and having a uniform height different from a height of the flat region; a plurality of semiconductor elements having similar shapes or the same shape, and formed on the flat region; and a wiring metal connecting the plurality of semiconductor elements via contact holes formed in a second insulating film on the semiconductor elements.
    Type: Application
    Filed: June 17, 2019
    Publication date: January 2, 2020
    Inventor: Hiroaki Takasu
  • Publication number: 20190305075
    Abstract: A thin film resistor includes a high-resistance region and low-resistance regions which are formed at both ends of the high-resistance region. The high-resistance region includes first high-resistance regions and a second high-resistance region, and the first high-resistance regions are formed to be in contact with both ends of the second high-resistance region formed in a rectangular shape in a transverse direction (first direction) of the second high-resistance region. In a longitudinal direction (second direction) orthogonal to the transverse direction, the first high-resistance regions have the same length as that of the second high-resistance region, and both end surfaces of the first high-resistance regions in the longitudinal direction are flush with both end surfaces of the second high-resistance region in the longitudinal direction to form flat planes.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Inventor: Hiroaki TAKASU
  • Patent number: 8907443
    Abstract: In order to suppress an off leak current of an off transistor for ESD protection, in an NMOS for ESD protection whose isolation region has a shallow trench structure, a drain region is placed apart from the shallow trench isolation region so as not to be in direct contact with the shallow trench isolation region in a region where the drain region of the NMOS transistor for ESD protection is adjacent to at least a gate electrode of the NMOS transistor for ESD protection.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: December 9, 2014
    Assignee: Seiko Instruments Inc.
    Inventor: Hiroaki Takasu
  • Patent number: 8587051
    Abstract: Provided is an electrically erasable and programmable nonvolatile semiconductor memory device whose tunnel region formed in the drain region has the second conductivity-type low-impurity-concentration region with the first tunnel insulating film for solely injecting electrons disposed thereon, and the first conductivity-type low-impurity-concentration region with the second tunnel insulating film for solely ejecting electrons disposed thereon, both regions fixed to the same potential as the drain region and having a lower impurity concentration than that of the drain region.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: November 19, 2013
    Assignee: Seiko Instruments Inc.
    Inventor: Hiroaki Takasu
  • Patent number: 8575679
    Abstract: Provided is an electrically erasable and programmable nonvolatile semiconductor memory device having a tunnel region; the tunnel region and the peripheral of the tunnel region are dug down to be made lower, and a depletion electrode, to which an arbitral potential is given to deplete a part of the tunnel region through a depletion electrode insulating film, is arranged in the lowered drain region.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: November 5, 2013
    Assignee: Seiko Instruments Inc.
    Inventor: Hiroaki Takasu
  • Patent number: 8558302
    Abstract: Provided is an electrically erasable and programmable nonvolatile semiconductor memory device having a small hole in a second conductivity-type drain region, a tunnel insulating film formed on the surface of the hole, and a protrusion extended from the floating gate electrode and arranged to fill the hole. Further a tunneling restriction region which is an electrically floating first conductivity type region arranged in a vicinity of the surface of the drain region around the hole to define the size of the tunnel region through which the tunnel current flows.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 15, 2013
    Assignee: Seiko Instruments Inc.
    Inventor: Hiroaki Takasu
  • Patent number: 8465999
    Abstract: In a manufacturing method for an image sensor integrated circuit, a plurality of pixel regions each having a photodiode are arranged on a silicon substrate. A light-transmissive conductive film is formed over the silicon substrate. A protective film is formed on the light-transmissive conductive film while holding a potential of the light-transmissive conductive film at the same potential as that of the silicon substrate.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: June 18, 2013
    Assignee: Seiko Instruments Inc.
    Inventor: Hiroaki Takasu
  • Patent number: 8450799
    Abstract: A field effect transistor has an insulating substrate, a semiconductor thin film formed on the insulating substrate, and a gate insulating film on the semiconductor thin film. A first gate electrode is formed on the gate insulating film. A first region and a second region having a first conductivity type are formed on or in a surface of the semiconductor film on opposite sides of the first gate electrode in a length direction thereof. A third region having a second conductivity type opposite the first conductivity type is arranged on or in the semiconductor film side by side with the second region in a width direction of the first gate electrode. The third region and the second region are in contact with each other and make a low resistance junction. A second gate electrode is formed on the gate insulating film along the second region. A fourth region having the first conductivity type is formed on or in the semiconductor film on an opposite side of the second region with respect to the second gate electrode.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: May 28, 2013
    Assignees: Seiko Instruments Inc.
    Inventors: Yutaka Hayashi, Hisashi Hasegawa, Hiroaki Takasu, Jun Osanai
  • Patent number: 8445983
    Abstract: A semiconductor device for performing photoelectric conversion of incident light includes a substrate and a well region having different conductivity types. A depletion layer is generated in a vicinity of a junction interface between the substrate and the well region. A first trench has a depth equal to a height up to a top portion of the depletion layer generated on a bottom side of the well region and a width extending to a heavily doped region formed in the well region. A second trench has a depth larger than that of a portion of the depletion layer generated on the bottom side of the well region and a width larger than that of portions of the depletion layer generated on the sides of the well region. The second trench surrounds the first trench so as to confine the depletion layer under the first trench except for a region thereof under the heavily doped region. An insulator is buried into each the first trench and the second trench.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: May 21, 2013
    Assignee: Seiko Instruments Inc.
    Inventors: Atsushi Iwasaki, Hiroaki Takasu
  • Patent number: 8283725
    Abstract: In a semiconductor device including an n-type metal oxide semiconductor transistor for electrostatic discharge protection surrounded by a shallow trench for device isolation, in order to suppress the off-leak current in an off state, there is formed, in the vicinity of the drain region of the NMOS transistor for ESD protection, an n-type region receiving a signal from an external connection terminal via a p-type region in contact with the drain region of the NMOS transistor for ESD protection.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: October 9, 2012
    Assignee: Seiko Instruments, Inc.
    Inventor: Hiroaki Takasu