Patents Assigned to Fujitsu Semiconductor Limited
  • Patent number: 9287168
    Abstract: A semiconductor device having a contact structure is provided. The semiconductor device includes: a conductive region; a first film and a second film which are formed over the conductive region to realize a layer; and a contact electrode which extends through the layer to the conductive region, and is formed so as to replace a portion of the layer with a portion of the contact electrode, where the portion of the layer is constituted by only the first film, only the second film, or both of a portion of the first film and a portion of the second film, and the portion of the first film occupies a major part of the portion of the layer.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: March 15, 2016
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Hiroshi Morioka, Jusuke Ogura, Sergey Pidin
  • Patent number: 9287277
    Abstract: A semiconductor device includes: a memory cell transistor which has a floating gate, a control gate, and a source and a drain formed in a semiconductor substrate on both sides of the floating gate via a channel area; and a selecting transistor which has a select gate and a source and a drain formed in the semiconductor substrate on both sides of the select gate, wherein the source of the selecting transistor is connected to the drain of the memory cell transistor, the source of the memory cell transistor has an N-type first impurity diffusion layer, an N-type second impurity diffusion layer deeper than the first impurity diffusion layer, and an N-type third impurity diffusion layer which is shallower than the second impurity diffusion layer, and an impurity density of the second impurity diffusion layer is lower than that of the third impurity diffusion layer.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: March 15, 2016
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Tatsuya Sugimachi, Satoshi Torii
  • Patent number: 9286262
    Abstract: The disclosure relates to scheduling threads in a multicore processor. Executable transactions may be scheduled using at least one distribution queue, which lists executable transactions in order of eligibility for execution, and multilevel scheduler which comprises a plurality of linked individual executable transaction schedulers. Each of these includes a scheduling algorithm for determining the most eligible executable transaction for execution. The most eligible executable transaction is outputted from the multilevel scheduler to the at least one distribution queue.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: March 15, 2016
    Assignees: Synopsys, Inc., Fujitsu Semiconductor Limited
    Inventor: Mark David Lippett
  • Patent number: 9281248
    Abstract: A semiconductor device includes a substrate having a semiconducting surface having formed therein a first active region and a second active region, where the first active region consists of a substantially undoped layer at the surface and a highly doped screening layer of a first conductivity type beneath the first substantially undoped layer, and the second active region consists of a second substantially undoped layer at the surface and a second highly doped screening layer of a second conductivity type beneath the second substantially undoped layer. The semiconductor device also includes a gate stack formed in each of the first active region and the second active region consists of at least one gate dielectric layer and a layer of a metal, where the metal has a workfunction that is substantially midgap with respect to the semiconducting surface.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: March 8, 2016
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Thomas Hoffmann, Pushkar Ranade, Scott E. Thompson
  • Patent number: 9276561
    Abstract: An integrated circuit device can include at least one oscillator stage having a current mirror circuit comprising first and second mirror transistors of a first conductivity type, and configured to mirror current on two mirror paths, at least one reference transistor of a second conductivity type having a source-drain path coupled to a first of the mirror paths, and a switching circuit coupled to a second of the mirror paths and configured to generate a transition in a stage output signal in response to a stage input signal received from another oscillator stage, wherein the channel lengths of the first and second mirror transistors are larger than that of the at least one reference transistor.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: March 1, 2016
    Assignee: MIE Fujitsu Semiconductor Limited
    Inventors: Lawrence T. Clark, David A. Kidd, Chao-Wu Chen
  • Patent number: 9268885
    Abstract: A method can include selecting integrated circuit (IC) device fabrication process source variations; generating relationships between each process source variance and a device metric variance; and calculating at least one IC device metric value from the process source variations and corresponding relationships between each process source variance and a device metric variance.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: February 23, 2016
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventor: Jing Wang
  • Patent number: 9270265
    Abstract: A power on reset circuit including: a startup circuit keeping an operation signal in an operating state during a power supply rises; a bias circuit keeping the operation signal in the operating state; a BGR circuit being activated during the operating state, and outputting a fixed voltage after a predetermined time elapses; a power supply divided voltage generation circuit outputting a reference voltage; an activation detection circuit generating a control signal which becomes inactive when a power supply rises and becomes active when the fixed voltage reaches a predetermined level; a comparator circuit outputting a power on signal and detecting as the power on signal when the reference voltage is greater than the fixed voltage; and a switch turning on and fixing an output of the comparator circuit to an inactive logical value while the control signal is inactive, and turning off while the control signal is active.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: February 23, 2016
    Assignees: FUJITSU LIMITED, FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Hiroyuki Nakamoto, Kazuaki Oishi, Tomokazu Kojima
  • Patent number: 9263523
    Abstract: An advanced transistor with punch through suppression includes a gate with length Lg, a well doped to have a first concentration of a dopant, and a screening region positioned under the gate and having a second concentration of dopant. The second concentration of dopant may be greater than 5×1018 dopant atoms per cm3. At least one punch through suppression region is disposed under the gate between the screening region and the well. The punch through suppression region has a third concentration of a dopant intermediate between the first concentration and the second concentration of dopant. A bias voltage may be applied to the well region to adjust a threshold voltage of the transistor.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: February 16, 2016
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Lucian Shifren, Pushkar Ranade, Paul E. Gregory, Sachin R. Sonkusale, Weimin Zhang, Scott E. Thompson
  • Patent number: 9257425
    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: June 3, 2014
    Date of Patent: February 9, 2016
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Akira Katakami
  • Patent number: 9240386
    Abstract: A semiconductor device includes: a substrate in which a product region and scribe regions are defined; a 1st insulation film formed above the substrate; a metal film in the 1st insulation film, disposed within the scribe regions in such a manner as to surround the product region; a 2nd insulation film formed on the 1st insulation film and the metal film; a 1st groove disposed more inside than the metal film in such a manner as to surround the product region, and reaching from a top surface of the 2nd insulation film to a position deeper than a top surface of the metal film; and a 2nd groove disposed more outside than the metal film in such a manner as to surround the metal film, and reaching from the top surface of the 2nd insulation film to a position deeper than the top surface of the metal film.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: January 19, 2016
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Hajime Wada
  • Patent number: 9236302
    Abstract: A semiconductor device has a semiconductor substrate having a first surface and a second surface, a through electrode penetrating through the semiconductor substrate and having a protrusion protruding from the second surface, and an insulation layer on the second surface, which covers the side surface of the protrusion, has an opening through which to expose the end surface of the protrusion, and has a thickness greater than the length of the protrusion.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: January 12, 2016
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Hikaru Ohira, Tamotsu Owada, Hirosato Ochimizu
  • Patent number: 9236466
    Abstract: A circuit can include at least one pair of deeply depleted channel (DDC) transistors having sources commonly coupled to a same current path; and a bias circuit configured to provide bias currents to the drains of the DDC transistors; wherein each DDC transistor includes a source and drain doped to a first conductivity type, a substantially undoped channel region, and a highly doped screening region of the first conductivity type formed below the channel region.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: January 12, 2016
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Sang-Soo Lee, Heetae Ahn, Augustine Kuo
  • Patent number: 9235114
    Abstract: A reflective mask includes a substrate and a multilayer reflective film formed on the substrate. An absorption pattern is formed on the multilayer reflective film. A recess is formed in the multilayer reflective film in a peripheral region of the absorption pattern.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: January 12, 2016
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Takeshi Kagawa
  • Patent number: 9231541
    Abstract: Circuits are disclosed that may include a plurality of transistors having controllable current paths coupled between at least a first and second node, the transistors configured to generate an analog electrical output signal in response to an analog input value; wherein at least one of the transistors has 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.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: January 5, 2016
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Lawerence T. Clark, Scott E. Thompson
  • Patent number: 9224733
    Abstract: A semiconductor structure includes a first PMOS transistor element having a gate region with a first gate metal associated with a PMOS work function and a first NMOS transistor element having a gate region with a second metal associated with a NMOS work function. The first PMOS transistor element and the first NMOS transistor element form a first CMOS device. The semiconductor structure also includes a second PMOS transistor that is formed in part by concurrent deposition with the first NMOS transistor element of the second metal associated with a NMOS work function to form a second CMOS device with different operating characteristics than the first CMOS device.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: December 29, 2015
    Assignee: Mie Fujitsu Semiconductor Limited
    Inventors: Lucian Shifren, Pushkar Ranade, Sachin R. Sonkusale
  • Patent number: 9224745
    Abstract: A method of manufacturing a semiconductor device includes: forming a conductive film on a semiconductor substrate; patterning the conductive film in a memory region to form a first gate electrode; after forming the first gate electrode, forming a mask film above each of the conductive film in a logic region and the first gate electrode; removing the mask film in the logic region; forming a first resist film above the mask film left in the memory region and above the conductive film left in the logic region; and forming a second gate electrode in the logic region by etching the conductive film using the first resist film as a mask.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: December 29, 2015
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Satoshi Torii
  • Patent number: 9224729
    Abstract: A semiconductor device includes: a first well provided in a semiconductor substrate; a second well provided in the semiconductor substrate, so as to be isolated from the first well; a Schottky barrier diode formed in the first well; and a PN junction diode formed in the second well, with an impurity concentration of the PN junction thereof set higher than an impurity concentration of the Schottky junction of the Schottky barrier diode, and being connected antiparallel with the Schottky barrier diode.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: December 29, 2015
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Dai Kanai, Taiji Ema, Kazushi Fujita
  • Patent number: 9214524
    Abstract: A semiconductor device includes a semiconductor substrate, a gate insulating film formed over the semiconductor substrate, a gate electrode formed on the gate insulating film, a first semiconductor layer which is embedded into a portion on both sides of the gate electrode in the semiconductor substrate, and which includes Si and a 4B group element other than Si, and a second semiconductor layer which is embedded into the portion on both sides of the gate electrode in the semiconductor substrate, so as to be superposed on the first semiconductor layer, and which includes Si and a 4B group element other than Si, wherein the gate electrode is more separated from an end of the first semiconductor layer than from an end of the second semiconductor layer.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: December 15, 2015
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventor: Naoyoshi Tamura
  • Patent number: 9209111
    Abstract: A semiconductor device includes first and second conductor patterns embedded in a first interlayer insulation film and a third conductor pattern embedded in a second interlayer insulation film, the third conductor pattern including a main part and an extension part, the extension part being electrically connected to the first conductor pattern by a first via-plug, the extension part having a branched pattern closer to the main part compared with the first conductor pattern, the branched pattern making a contact with the second conductor pattern via a second via-plug, each of the main part, extension part including the branched pattern, first via-plug and second via-plug forming a damascene structure.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: December 8, 2015
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Kenichi Watanabe, Tomoji Nakamura, Satoshi Otsuka
  • Patent number: 9202759
    Abstract: A semiconductor manufacturing method includes exposing on a photoresist film a first partial pattern of a contact hole, overlapping a part of a gate interconnection in alignment with an alignment mark formed simultaneously with forming the gate interconnection, exposing on the photoresist film a second partial pattern, overlapping a part of an active region in alignment with an alignment mark formed simultaneously with forming the active region, developing the photoresist film to form an opening at the portion where the first partial pattern and the second partial pattern have been exposed, and etching an insulation film to form a contact hole down to the gate interconnection and the source/drain diffused layer.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: December 1, 2015
    Assignee: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Masaki Okuno, Hajime Yamamoto