Patents by Inventor Masatoshi Hasegawa

Masatoshi Hasegawa 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: 20050232038
    Abstract: In a bit-line direction, a plurality of memory mats are arranged including a plurality of memory cells respectively coupled to bit lines and word lines, and a sense amplifier array is arranged including a plurality of latch circuits having input/output nodes connected to a half of bit-line pairs separately provided to the memory mats in a region between the memory mats placed in the bit-line direction, thereby making possible to replace with a redundant bit line pair and the corresponding redundant sense amplifier on a basis of each bit-line pair and sense amplifier connected thereto, thereby realizing effective and rational Y-system relief.
    Type: Application
    Filed: June 14, 2005
    Publication date: October 20, 2005
    Inventors: Masatoshi Hasegawa, Kazuhiko Kajigaya
  • Patent number: 6954371
    Abstract: The present invention provides a dynamic RAM which can be operated at a low voltage and realizes the enhancement of a read margin and an area-saving layout.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: October 11, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tomofumi Hokari, Masatoshi Hasegawa, Yousuke Tanaka
  • Patent number: 6927274
    Abstract: Polyimide precursors contained in resin compositions of the present invention have a polymer structure unit represented by formula (1) below: wherein chemical structure A2 includes an alicyclic compound but not an aromatic compound such as a benzene ring so that they provide excellent light transmission over a wide wavelength range. The polyimide precursors are imidized at 7.5% or more and 36% or less so that they are less soluble in developing solutions and therefore are not dissolved in the developing solutions at unexposed parts. Thus, the resin compositions of the present invention can be used to form a resin film having a precise pattern by exposure and development.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: August 9, 2005
    Assignee: Sony Chemicals Corp.
    Inventors: Mamiko Nomura, Masatoshi Hasegawa, Junichi Ishii, Tadashi Akamatsu
  • Publication number: 20050162969
    Abstract: The present invention provides a semiconductor integrated circuit device equipped with a memory circuit, which realizes speeding up of its operation in a simple configuration or realizes high reliability and enhancement of product yields in a simple configuration. A memory cell is selected from within a memory array having a plurality of memory cells by a selector or selection circuit. MOSFETs constituting a precharge circuit provided for signal lines for transferring a read signal therefrom to a main amplifier are respectively brought to an on state based on a memory cell select start signal transferred to the selection circuit and brought to an off state prior to the transfer of the read signal from the memory cell to thereby complete precharging, whereby NBTI degradation at standby is avoided.
    Type: Application
    Filed: January 24, 2005
    Publication date: July 28, 2005
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka
  • Patent number: 6909646
    Abstract: In a bit-line direction, a plurality of memory mats are arranged including a plurality of memory cells respectively coupled to bit lines and word lines, and a sense amplifier array is arranged including a plurality of latch circuits having input/output nodes connected to a half of bit-line pairs separately provided to the memory mats in a region between the memory mats placed in the bit-line direction, thereby making possible to replace with a redundant bit line pair and the corresponding redundant sense amplifier on a basis of each bit-line pair and sense amplifier connected thereto, thereby realizing effective and rational Y-system relief.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: June 21, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masatoshi Hasegawa, Kazuhiko Kajigaya
  • Publication number: 20050077582
    Abstract: A semiconductor integrated circuit device capable of achieving higher integration and simplification of manufacturing processes is provided. Circuitry is provided which includes a first N-channel MOSFET and a first p-channel MOSFET each having a gate insulating dielectric film with a first film thickness, wherein a poly-silicon layer making up a gate electrode is doped with an N-type impurity. The circuitry also includes a second N-channel MOSFET having a gate insulator film with a second film thickness thinner than the first thickness, wherein an N-type impurity is doped into a polysilicon layer making up a gate electrode, and a second P-channel MOSFET with a P-type impurity being doped into a polysilicon layer making up a gate electrode. The gate electrodes of the first N-channel MOSFET and first P-channel MOSFET are integrally formed and mutually connected together.
    Type: Application
    Filed: October 5, 2004
    Publication date: April 14, 2005
    Inventors: Tsuneo Kawamata, Masatoshi Hasegawa, Keinosuke Toriyama, Tomofumi Hokari
  • Patent number: 6865127
    Abstract: The present invention provides a semiconductor integrated circuit device equipped with a memory circuit, which realizes speeding up of its operation in a simple configuration or realizes high reliability and enhancement of product yields in a simple configuration. A memory cell is selected from within a memory array having a plurality of memory cells by a selector or selection circuit. MOSFETs constituting a precharge circuit provided for signal lines for transferring a read signal therefrom to a main amplifier are respectively brought to an on state based on a memory cell select start signal transferred to the selection circuit and brought to an off state prior to the transfer of the read signal from the memory cell to thereby complete precharging, whereby NBTI degradation at standby is avoided.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: March 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka
  • Publication number: 20050035411
    Abstract: A semiconductor integrated circuit device realizing high integration and a simplified manufacturing process. The circuit includes a gate insulator with a first film thickness, a first N-channel MOSFET and a first P-channel MOSFET, in which a polysilicon layer consists of a gate electrode including an N-type impurity dose, and a gate insulator with a second film thickness thinner than the first film thickness. The circuit also includes a second N-channel MOSFET and a second P-channel MOSFET in which the polysilicon layers are doped with N-type impurity and P-type impurity, respectively. Gate electrodes of said first N-channel MOSFET and first P-channel MOSFET are formed as one body and connected to each other.
    Type: Application
    Filed: June 15, 2004
    Publication date: February 17, 2005
    Inventors: Masatoshi Hasegawa, Kazutaka Mori, Tomofumi Hokari
  • Publication number: 20050024949
    Abstract: The present invention provides a dynamic RAM which can be operated at a low voltage and realizes the enhancement of a read margin and an area-saving layout.
    Type: Application
    Filed: June 4, 2004
    Publication date: February 3, 2005
    Inventors: Tomofumi Hokari, Masatoshi Hasegawa, Yousuke Tanaka
  • Publication number: 20050018461
    Abstract: Inputs of a control circuit are connected to a terminal to which an external operation control signal is supplied and a terminal to which a timing signal used exclusively for testing is supplied, and the control circuit is made controllable such that, in a test mode, a state of an internal operation control signal is changed in response to a change of a state of the external operation control signal, and the internal operation control signal is changed in response to the timing exclusively used for testing, whereas, in a normal operation mode, the state of the internal operation control signal is changed in response to the change of the state of the external operation control signal, and the internal operation control signal is changed in response to the change of the external operation control signal.
    Type: Application
    Filed: August 16, 2004
    Publication date: January 27, 2005
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka, Hiroshi Akasaki, Masahiro Katayama
  • Publication number: 20050007846
    Abstract: Disclosed herein is a semiconductor integrated circuit device equipped with a memory circuit, which realizes the speeding up of its operation and low power consumption thereof in a simple configuration. At input/output nodes of a sense amplifier including a CMOS latch circuit for performing an amplifying operation in response to an operation timing signal, a pair of first precharge MOSFETs brought to an on state during a precharge period to thereby supply a precharge voltage, and select switch MOSFETs for connecting the input/output nodes and each complementary bit line pair in response to a select signal are provided. A second precharge MOSFET for short-circuiting the complementary bit line pair is provided between the complementary bit line pair. A memory array is provided which includes dynamic memory cells each comprising an address selecting MOSFET and a storage capacitor, each of which is provided between one of the complementary bit line pair and a word line intersecting it.
    Type: Application
    Filed: August 10, 2004
    Publication date: January 13, 2005
    Inventors: Yousuke Tanaka, Tomofumi Hokari, Masatoshi Hasegawa
  • Publication number: 20040259306
    Abstract: Mutual diffusion of impurities in a gate electrode is suppressed near a boundary between an n-channel type MISFET and a p-channel type MISFET, which adopt a polycide's dual-gate structure. Since a gate electrode of an n-channel type MISFET and a gate electrode of a p-channel type MISFET are of mutually different conductivity types, they are separated to prevent the mutual diffusion of the impurities and are electrically connected to each other via a metallic wiring formed in the following steps. In a step before a gate electrode material is patterned to separate the gate electrodes, the mutual diffusion of the impurities before forming the gate electrodes is prevented by performing no heat treatment at a temperature of 700° C. or higher.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 23, 2004
    Applicant: Renesas Technology Corp.
    Inventors: Satoshi Sakai, Daichi Matsumoto, Katsuyuki Asaka, Masatoshi Hasegawa, Kazutaka Mori
  • Publication number: 20040196080
    Abstract: In a semiconductor integrated circuit device that includes macro cells (circuit blocks that can be designed independently) such as a storage circuit and operates synchronously with an external clock, total delay time from signal input to output is reduced and the speed of operation is increased. In the semiconductor integrated circuit device which has plural circuit blocks coupled in series for signal transmission and whose whole operation is controlled by a clock signal, the semiconductor integrated circuit device including first circuit blocks that receive input signals in response to a first timing signal based on a clock signal, and a second circuit block that forms output signals in response to a second timing signal based on the clock signal, a time difference between the first timing signal and the second timing signal is set to a non-integral multiple of the cycle of the clock signal.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 7, 2004
    Applicants: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Hiroshi Akasaki, Shuichi Miyaoka, Yuji Yokoyama, Masatoshi Hasegawa, Kozaburo Kurita
  • Publication number: 20040190345
    Abstract: A Y selection line for write for controlling operations of a column selection switch within a write amplifier and a Y selection line for read for controlling operations of a column selection switch within a read amplifier are provided individually and the column selection switch within the read amplifier is set to the non-operating condition during the write operation. Accordingly, a through-current during the write operation may be reduced. In this case, the write IO line and read IO line are allocated crossing sense amplifier columns, while the column selection line for write and column selection line for read are allocated in parallel to the sense amplifier columns.
    Type: Application
    Filed: July 24, 2003
    Publication date: September 30, 2004
    Inventors: Masatoshi Sakamoto, Masatoshi Hasegawa
  • Patent number: 6794678
    Abstract: Inputs of a control circuit are connected to a terminal to which an external operation control signal is supplied and a terminal to which a timing signal used exclusively for testing is supplied, and the control circuit is made controllable such that, in a test mode, a state of an internal operation control signal is changed in response to a change of a state of the external operation control signal, and the internal operation control signal is changed in response to the timing exclusively used for testing, whereas, in a normal operation mode, the state of the internal operation control signal is changed in response to the change of the state of the external operation control signal, and the internal operation control signal is changed in response to the change of the external operation control signal.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: September 21, 2004
    Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka, Hiroshi Akasaki, Masahiro Katayama
  • Patent number: 6795358
    Abstract: Disclosed herein is a semiconductor integrated circuit device equipped with a memory circuit, which realizes the speeding up of its operation and low power consumption thereof in a simple configuration. At input/output nodes of a sense amplifier including a CMOS latch circuit for performing an amplifying operation in response to an operation timing signal, a pair of first precharge MOSFETs brought to an on state during a precharge period to thereby supply a precharge voltage, and select switch MOSFETs for connecting the input/output nodes and each complementary bit line pair in response to a select signal are provided. A second precharge MOSFET for short-circuiting the complementary bit line pair is provided between the complementary bit line pair. A memory array is provided which includes dynamic memory cells each comprising an address selecting MOSFET and a storage capacitor, each of which is provided between one of the complementary bit line pair and a word line intersecting it.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: September 21, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yousuke Tanaka, Tomofumi Hokari, Masatoshi Hasegawa
  • Publication number: 20040127595
    Abstract: Polyimide precursors contained in resin compositions of the present invention have a polymer structure unit represented by formula (1) below: 1
    Type: Application
    Filed: October 24, 2003
    Publication date: July 1, 2004
    Inventors: Mamiko Nomura, Masatoshi Hasegawa, Junichi Ishii, Tadashi Akamatsu
  • Patent number: 6735129
    Abstract: In a semiconductor integrated circuit device that includes macro cells (circuit blocks that can be designed independently) such as a storage circuit and operates synchronously with an external clock, total delay time from signal input to output is reduced and the speed of operation is increased. In the semiconductor integrated circuit device which has plural circuit blocks coupled in series for signal transmission and whose whole operation is controlled by a clock signal, the semiconductor integrated circuit device including first circuit blocks that receive input signals in response to a first timing signal based on a clock signal, and a second circuit block that forms output signals in response to a second timing signal based on the clock signal, a time difference between the first timing signal and the second timing signal is set to a non-integral multiple of the cycle of the clock signal.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: May 11, 2004
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Hiroshi Akasaki, Shuichi Miyaoka, Yuji Yokoyama, Masatoshi Hasegawa, Kozaburo Kurita
  • Publication number: 20040017705
    Abstract: In a bit-line direction, a plurality of memory mats are arranged including a plurality of memory cells respectively coupled to bit lines and word lines, and a sense amplifier array is arranged including a plurality of latch circuits having input/output nodes connected to a half of bit-line pairs separately provided to the memory mats in a region between the memory mats placed in the bit-line direction, thereby making possible to replace with a redundant bit line pair and the corresponding redundant sense amplifier on a basis of each bit-line pair and sense amplifier connected thereto, thereby realizing effective and rational Y-system relief.
    Type: Application
    Filed: July 28, 2003
    Publication date: January 29, 2004
    Inventors: Masatoshi Hasegawa, Kazuhiko Kajigaya
  • Publication number: 20030235101
    Abstract: Disclosed herein is a semiconductor integrated circuit device equipped with a memory circuit, which realizes the speeding up of its operation and low power consumption thereof in a simple configuration. At input/output nodes of a sense amplifier including a CMOS latch circuit for performing an amplifying operation in response to an operation timing signal, a pair of first precharge MOSFETs brought to an on state during a precharge period to thereby supply a precharge voltage, and select switch MOSFETs for connecting the input/output nodes and each complementary bit line pair in response to a select signal are provided. A second precharge MOSFET for short-circuiting the complementary bit line pair is provided between the complementary bit line pair. A memory array is provided which includes dynamic memory cells each comprising an address selecting MOSFET and a storage capacitor, each of which is provided between one of the complementary bit line pair and a word line intersecting it.
    Type: Application
    Filed: June 12, 2003
    Publication date: December 25, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Yousuke Tanaka, Tomofumi Hokari, Masatoshi Hasegawa