Patents Assigned to FUJITSU SEMICONDUCTOR
  • Patent number: 9748231
    Abstract: A semiconductor device includes: a substrate; a first active region formed in the substrate and that includes a first region that has a first width and a second region including a second width larger than the first width and extended in a first direction; a second active region formed in the substrate and extended in parallel to the second region of the first active region; and an element isolation insulating film formed in the substrate and that partitions the first active region and the second active region, respectively, wherein the second region of the first active region or the second active region includes a depressed part depressed in a second direction that is perpendicular to the first direction in a plan view.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: August 29, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Makoto Yasuda, Taiji Ema, Mitsuaki Hori, Kazushi Fujita
  • Patent number: 9741428
    Abstract: An integrated circuit can include multiple SRAM cells, each including at least two pull-up transistors, at least two pull-down transistors, and at least two pass-gate transistors, each of the transistors having a gate; at least one of the pull-up transistors, the pull-down transistors, or the pass-gate transistors having a screening region a distance below the gate and separated from the gate by a semiconductor layer, the screening region having a concentration of screening region dopants, the concentration of screening region dopants being higher than a concentration of dopants in the semiconductor layer, the screening region providing an enhanced body coefficient for the pull-down transistors and the pass-gate transistors to increase the read static noise margin for the SRAM cell when a bias voltage is applied to the screening region; and a bias voltage network operable to apply one or more bias voltages to the multiple SRAM cells.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: August 22, 2017
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Lawrence T. Clark, Scott E. Thompson, Richard S. Roy, Robert Rogenmoser, Damodar R. Thummalapally
  • Patent number: 9728468
    Abstract: A first well in a first conductivity type which is formed at a first region and is electrically connected to a first power supply line, a second well in a second conductivity type being an opposite conductivity type of the first conductivity type which is formed at a second region and is electrically connected to a second power supply line, a third well in the second conductivity type which is integrally formed with the second well at a third region adjacent to the second region, a fourth well in the first conductivity type integrally formed with the first well at a fourth region adjacent to the first region, a fifth well in the first conductivity type which is formed at the third region to be shallower than the third well, and a sixth well in the second conductivity type which is formed at the fourth region to be shallower than the fourth well, are included.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: August 8, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Akira Katakami
  • Publication number: 20170221777
    Abstract: A first mask with a first pattern is formed above a substrate, a first portion is formed in or above the substrate using the first mask, a second mask with a second pattern is formed above the substrate, a first positional deviation between the first portion and the second pattern is measured, a second portion is formed in or above the substrate using the second mask, a third mask with a third pattern is formed above the substrate, and a third portion is formed in or above the substrate using the third mask. In the forming the third mask, the third pattern is formed in a material film for the third mask with alignment in consideration of the first positional deviation.
    Type: Application
    Filed: December 21, 2016
    Publication date: August 3, 2017
    Applicant: MIE FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Toshio Sawano
  • Publication number: 20170214404
    Abstract: Digital circuits are disclosed that may include multiple transistors having controllable current paths coupled between first and second logic nodes. One or more of the transistors may have a deeply depleted channel formed below its gate that includes a substantially undoped channel region formed over a relatively highly doped screen layer formed over a doped body region. Resulting reductions in threshold voltage variation may improve digital circuit performance. Logic circuit, static random access memory (SRAM) cell, and passgate embodiments are disclosed.
    Type: Application
    Filed: April 6, 2017
    Publication date: July 27, 2017
    Applicant: Mie Fujitsu Semiconductor Limited
    Inventors: Scott E. Thompson, Lawrence T. Clark
  • Patent number: 9710006
    Abstract: An integrated circuit device can include at least a first body bias circuit configured to generate a first body bias voltage different from power supply voltages of the IC device; at least a first bias control circuit configured to set a first body bias node to a first power supply voltage, and subsequently enabling the first body bias node to be set to the first body bias voltage; and a plurality of first transistors having bodies connected to the first body bias node.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: July 18, 2017
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventor: Edward J. Boling
  • Patent number: 9704592
    Abstract: A semiconductor storage device including plural bit lines, plural select gate lines that intersect with the plural bit lines, and plural memory cells that each include a p-channel memory transistor. The semiconductor storage device includes plural p-channel charging transistors that are respectively connected to the plural bit lines, and a charging line that is connected to each of the plurality of charging transistors. A controller that ON/OFF controls the charging transistors places each of the charging transistors in an ON state prior to read current flowing in a read target bit line, and that places the charging transistor connected to the read target bit line in an OFF state when read current flows in the read target bit line.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: July 11, 2017
    Assignee: MIE FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Satoshi Torii
  • Patent number: 9704740
    Abstract: A semiconductor device includes an insulating layer formed over a semiconductor substrate, the insulating layer including oxygen, a first wire formed in the insulating layer, and a second wire formed in the insulating layer over the first wire and containing manganese, oxygen, and copper, the second wire having a projection portion formed in the insulating layer and extending downwardly but spaced apart from the first wire.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: July 11, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Hirosato Ochimizu, Atsuhiro Tsukune, Hiroshi Kudo
  • Publication number: 20170186704
    Abstract: A semiconductor device includes a first moisture-resistant ring disposed in a peripheral region surrounding a circuit region on a semiconductor substrate in such a way as to surround the circuit region and a second moisture-resistant ring disposed in the peripheral region in such a way as to surround the first moisture-resistant ring.
    Type: Application
    Filed: March 15, 2017
    Publication date: June 29, 2017
    Applicant: MIE FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Jun Sakuma, Hideaki Matsumura, Tadashi Ohshima
  • Publication number: 20170186649
    Abstract: A semiconductor device manufacturing method includes forming a silicon layer by epitaxial growth over a semiconductor substrate having a first area and a second area; forming a first gate oxide film by oxidizing the silicon layer; removing the first gate oxide film from the second area, while maintaining the first gate oxide film in the first area; thereafter, increasing a thickness of the first gate oxide film in the first area and simultaneously forming a second gate oxide film by oxidizing the silicon layer in the second area; and forming a first gate electrode and a second gate electrode over the first gate oxide film and the second gate oxide film, respectively, wherein after the formation of the first and second gate electrodes, the silicon layer in the first area is thicker than the silicon layer in the second area.
    Type: Application
    Filed: March 16, 2017
    Publication date: June 29, 2017
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Makoto Yasuda, Taiji Ema, Mitsuaki Hori, Kazushi Fujita
  • Patent number: 9691767
    Abstract: A manufacturing method of a semiconductor device according to a disclosed embodiment includes: implanting a first impurity into a first region of a semiconductor substrate, forming a semiconductor layer on the semiconductor substrate, forming a trench in the semiconductor layer and the semiconductor substrate, forming an isolation insulating film in the trench, implanting a second impurity into a second region of the semiconductor layer, forming a first gate insulating film and a first gate electrode in the first region, forming a second gate insulating film and a second gate electrode in the second region, forming a first source region and a first drain region at both sides of the first gate electrode, and forming a second source region and a second drain region at both sides of the second gate electrode.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: June 27, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Kazushi Fujita, Taiji Ema, Mitsuaki Hori, Yasunobu Torii
  • Patent number: 9685416
    Abstract: A semiconductor wafer includes: a first semiconductor chip area formed with a semiconductor element; a second semiconductor chip area formed with a semiconductor element; and a scribe area sandwiched between said first and second semiconductor chip areas; wherein: the first semiconductor chip area includes a first metal ring surrounding the semiconductor element formed in the first semiconductor chip area; and the metal ring is constituted of a plurality of metal layers including an lower metal layer and an upper metal layer superposed upon the lower metal layer, and the upper metal layer is superposed upon the lower metal layer in such a manner that an outer side wall of the upper metal layer is flush with the outer side wall of the lower metal layer or is at an inner position of said first semiconductor chip area relative to said outer side wall of the lower metal layer.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: June 20, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Kazutaka Yoshizawa, Taiji Ema
  • Patent number: 9685442
    Abstract: A semiconductor device including an insulating film in a first region of a semiconductor substrate; a first impurity region and a second impurity region of a first conductivity type, each of the regions including a part located deeper than the insulating film in contact with each other, and the insulating film being sandwiched by the first and second impurity regions in planar view in the first region of the semiconductor substrate; a metal silicide film on the first impurity region and in Schottky junction with the first impurity region; a first impurity of the first impurity region having a peak of a concentration profile deeper than a bottom of the insulating film; a second impurity of the second impurity region having a concentration higher than a concentration of the first impurity in a part of the first impurity region shallower than the bottom of the insulating film.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: June 20, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Kazushi Fujita, Taiji Ema, Makoto Yasuda, Mitsuaki Hori
  • Patent number: 9680470
    Abstract: Digital circuits are disclosed that may include multiple transistors having controllable current paths coupled between first and second logic nodes. One or more of the transistors may have a deeply depleted channel formed below its gate that includes a substantially undoped channel region formed over a relatively highly doped screen layer formed over a doped body region. Resulting reductions in threshold voltage variation may improve digital circuit performance. Logic circuit, static random access memory (SRAM) cell, and passgate embodiments are disclosed.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: June 13, 2017
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Scott E. Thompson, Lawrence T. Clark
  • Patent number: 9679904
    Abstract: A method of manufacturing a semiconductor device includes: forming a conductive film over a semiconductor substrate; forming a first ferroelectric film over the conductive film; forming an amorphous second ferroelectric film over the first ferroelectric film; forming a transition metal oxide material film containing ruthenium over the second ferroelectric film; forming a first conductive metal oxide film over the transition metal oxide material film without exposing the transition metal oxide material film to the air; annealing and crystallizing the second ferroelectric film; and patterning the first conductive metal oxide film, the first ferroelectric film, the second ferroelectric film, and the conductive film to form a ferroelectric capacitor.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: June 13, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Wensheng Wang
  • Patent number: 9634021
    Abstract: A semiconductor device manufacturing method includes forming a silicon layer by epitaxial growth over a semiconductor substrate having a first area and a second area; forming a first gate oxide film by oxidizing the silicon layer; removing the first gate oxide film from the second area, while maintaining the first gate oxide film in the first area; thereafter, increasing a thickness of the first gate oxide film in the first area and simultaneously forming a second gate oxide film by oxidizing the silicon layer in the second area; and forming a first gate electrode and a second gate electrode over the first gate oxide film and the second gate oxide film, respectively, wherein after the formation of the first and second gate electrodes, the silicon layer in the first area is thicker than the silicon layer in the second area.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: April 25, 2017
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Makoto Yasuda, Taiji Ema, Mitsuaki Hori, Kazushi Fujita
  • Patent number: 9619235
    Abstract: A processor accesses memory storing a compressed instruction sequence that includes compression information indicating that an instruction that with respect to the preceding instruction, has identical operation code and operand continuity is compressed.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: April 11, 2017
    Assignees: FUJITSU LIMITED, FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Mitsuru Tomono, Hiroya Uehara, Makiko Ito
  • Patent number: 9614482
    Abstract: An amplifier includes two input terminals to receive a differential, two-tone transmission signal; two output terminals; a coil having terminals connected with the input terminals respectively, and a center tap; a first transistor having the gate connected with one terminal of the coil, and the output terminal connected with one output terminal; a second transistor having the gate connected with the other terminal of the coil, and the output terminal connected with the other output terminal; a diode having a terminal connected with the center tap; and a bias circuit connected with the other terminal of the diode to output a gate voltage to turn on the first and second transistors. The diode adjusts the terminal voltage depending on a signal level of a double harmonic wave of the transmission signal supplied to the terminal of the diode from the center tap.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: April 4, 2017
    Assignees: FUJITSU LIMITED, FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Yoichi Kawano, Shinji Yamaura
  • Publication number: 20170062283
    Abstract: There are included: forming element isolation regions in a semiconductor substrate; introducing a first impurity of a first conductivity type, to thereby form a first well and a second well of the first conductivity type; introducing a second impurity of a second conductivity type, to thereby form a third well of the second conductivity type and introducing the second impurity into a region between the first well and the second well, to thereby form a separation well of the second conductivity type; and further introducing a third impurity of the second conductivity type into the region between the first well and the second well.
    Type: Application
    Filed: November 11, 2016
    Publication date: March 2, 2017
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Yasunobu Torii
  • Patent number: 9583484
    Abstract: An integrated circuit can include a plurality of first transistors formed in a substrate and having gate lengths of less than one micron and at least one tipless transistor formed in the substrate and having a source-drain path coupled between a circuit node and a first power supply voltage. In addition or alternatively, an integrated circuit can include minimum feature size transistors; a signal driving circuit comprising a first transistor of a first conductivity type having a source-drain path coupled between a first power supply node and an output node, and a second transistor of a second conductivity type having a source-drain path coupled between a second power supply node and the output node, and a gate coupled to a gate of the first transistor, wherein the first or second transistor is a tipless transistor.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: February 28, 2017
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventor: David A. Kidd