Patents Issued in September 25, 2014
  • Publication number: 20140284672
    Abstract: In an embodiment of the present invention, a method comprises patterning a first plurality of semiconductor structures in an array portion of a semiconductor substrate using a first photolithographic mask. The method further comprises patterning a second plurality of semiconductor structures over a logic portion of a semiconductor substrate using a second photolithographic mask. The method further comprises patterning a sacrificial layer over the first plurality of semiconductor structures using the second photolithographic mask. The sacrificial layer is patterned simultaneously with the second plurality of semiconductor structures.
    Type: Application
    Filed: June 5, 2014
    Publication date: September 25, 2014
    Inventor: Werner Juengling
  • Publication number: 20140284673
    Abstract: A selection operation is performed for individual memory cells. A device includes a first memory cell and a second memory cell provided in the same row as the first memory cell, each of which includes a field-effect transistor having a first gate and a second gate. The field-effect transistor controls at least data writing and data holding in the memory cell by being turned on or off. The device further includes a row selection line electrically connected to the first gates of the field-effect transistors included in the first memory cell and the second memory cell, a first column selection line electrically connected to the second gate of the field-effect transistor included in the first memory cell, and a second column selection line electrically connected to the second gate of the field-effect transistor included in the second memory cell.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Inventor: Daisuke Matsubayashi
  • Publication number: 20140284674
    Abstract: According to one embodiment, a semiconductor storage device includes a first capacitor, a second capacitor, a first selector gate, and a second selector gate. The first capacitor has first and second ends, the first end is electrically connected to an input end of a clock signal. The second capacitor as a spare has third and fourth ends and is electrically connected to the input end. The first selector gate is electrically connected between the second end of the first capacitor and a first node of the voltage generating circuit. The second selector gate is connected between the fourth end of the second capacitor and the first node of the voltage generating circuit. The first and second selector gates are switched based on an output voltage of the voltage generating circuit.
    Type: Application
    Filed: September 6, 2013
    Publication date: September 25, 2014
    Inventor: Hitoshi IWAI
  • Publication number: 20140284675
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes a foundation layer; and a stacked body provided on the foundation layer, each of a plurality of electrode layers and each of a plurality of insulating layers being stacked alternately in the stacked body; a select gate electrode provided on the stacked body; and a semiconductor layer extending from an upper end of the select gate electrode to a lower end of the stacked body. The stacked body includes a plurality of staircase regions. The each of the plurality of electrode layers includes an exposed portion. The exposed portion is not covered with the plurality of electrode layers other than the each of the plurality of electrode layers and the plurality of insulating layers. And the exposed portion of each of the plurality of electrode layers is disposed in one of the plurality of staircase regions.
    Type: Application
    Filed: August 28, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Nobutaka WATANABE
  • Publication number: 20140284676
    Abstract: Plural first charge accumulation layers are arranged on a first gate-insulating film, and divided in the first direction and the second direction. Plural second charge accumulation layers are arranged on a second gate-insulating film and divided in the first direction and the second direction. An intermediate insulating film is arranged on the side surface of the first charge accumulation layers and on the side surface of the second charge accumulation layers. The control electrode includes a side-surface portion, which is arranged on the side surface of the intermediate insulating film, extends in the second direction, and faces via the intermediate insulating film to the side surface of the first charge accumulation layer and the side surface of the second charge accumulation layer, and a pad portion arranged monolithically on the lower portion of the side-surface portion and having a width larger than the film thickness of the side-surface portion.
    Type: Application
    Filed: September 3, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Jungo INABA, Satoshi NAGASHIMA, Naoki KAI, Akiko SEKIHARA, Karin TAKAYAMA
  • Publication number: 20140284677
    Abstract: In a non-volatile semiconductor memory device, it is only necessary that, at the time of data writing, a voltage drop is caused in a high resistance region. Therefore, the value of voltage applied to a gate electrode can be reduced as compared with a conventional device. In correspondence with the reduction in the value of applied voltage, it is possible to reduce the film thickness of a gate insulating film of memory transistors, and further the film thickness of the gate insulating film of a peripheral transistor for controlling the memory transistors. As a result, the circuit configuration of the non-volatile semiconductor memory device can be reduced in size as compared with the conventional device.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 25, 2014
    Applicant: FLOADIA CORPORATION
    Inventors: Yasuhiro Taniguchi, Kosuke Okuyama
  • Publication number: 20140284678
    Abstract: A non-volatile memory and a manufacturing method thereof are provided. The non-volatile memory includes a substrate, word lines, select lines, and doped regions. The substrate includes a memory cell region and two select line regions located at two opposite sides of the memory cell region. The word lines are disposed in the memory cell region. The select lines are disposed in the select line regions. A line width of each of the word lines is equal to a line width of each of the select lines. A distance between the adjacent word lines, a distance between the adjacent select lines, and a distance between the adjacent select line and word line are equal to one another. The doped regions are located in the substrate at two sides of each of the word lines and at two sides of each of the select line regions.
    Type: Application
    Filed: June 20, 2013
    Publication date: September 25, 2014
    Inventors: Hui-Huang Chen, Chih-Yuan Chen, Zih-Song Wang
  • Publication number: 20140284679
    Abstract: According to one embodiment, a device includes a fin type active area on a semiconductor substrate, the active area having an upper surface with a taper shape, having a width in a first direction, and extending in a second direction intersect with the first direction, a first insulating layer on the active area, a charge storage layer on the first insulating layer, the charge storage layer having an upper surface with a taper shape, a second insulating layer covering the upper surface of the charge storage layer, and a control gate electrode on the second insulating layer, the control gate electrode extending in the first direction.
    Type: Application
    Filed: August 2, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Ryuji OHBA
  • Publication number: 20140284680
    Abstract: According to one embodiment, a nonvolatile memory includes the following structure. A first gate insulating film, a first floating gate, a second gate insulating film and a gate electrode are stacked on a semiconductor region between source and drain electrodes. A second floating gate is formed on a first side surface of the first floating gate. A first insulating film is formed between the first and second floating gates and has an air gap. A third floating gate is formed on a second side surface of the first floating gate on the opposite side of the first side surface. A second insulating film is formed between the first and third floating gates.
    Type: Application
    Filed: August 6, 2013
    Publication date: September 25, 2014
    Inventor: Daisaburo TAKASHIMA
  • Publication number: 20140284681
    Abstract: A semiconductor device of the present invention is a semiconductor device selectively including a nonvolatile memory cell on a semiconductor substrate, and includes a trench formed in the semiconductor substrate, an element separation portion buried into the trench such that the element separation portion has a projecting part projecting from the semiconductor substrate, the element separation portion defining an active region in first a region for the nonvolatile memory cell of the semiconductor substrate, and a floating gate disposed in the active region such that the floating gate selectively has an overlapping part overlapping the element separation portion, and the floating gate has a shape recessed with respect to the overlapping part.
    Type: Application
    Filed: February 11, 2014
    Publication date: September 25, 2014
    Applicant: ROHM CO., LTD.
    Inventor: Chikara TERADA
  • Publication number: 20140284682
    Abstract: A nonvolatile semiconductor storage device is disclosed that includes a p-type semiconductor substrate, a gate insulating film formed above the semiconductor substrate, a memory-cell transistor and a peripheral circuit transistor formed above the gate insulating film. The memory-cell transistor includes a first gate electrode including a stack of a floating gate electrode comprising a p-type first polycrystalline silicon film, an interelectrode insulating film, and a control gate electrode comprising a p-type second polycrystalline silicon film. The peripheral circuit transistor includes a second gate electrode including a stack of a lower electrode comprising an n-type third polycrystalline silicon film; a first insulating film having an opening and being located above the lower electrode, an upper electrode comprising the same material as the second polycrystalline silicon film and contacting the third polycrystalline silicon film through the opening of the first insulating film.
    Type: Application
    Filed: August 27, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Hideto TAKEKIDA
  • Publication number: 20140284683
    Abstract: According to one embodiment, a semiconductor device includes a memory cell, a dummy gate electrode and an interlayer insulation film. The memory cell includes a plurality of word lines as an arrangement on a semiconductor substrate and apart from each other, and a selection transistor being apart from an end of the arrangement. The dummy gate electrode has a structure larger than a word line in the arrangement direction, and is arranged between the end of the arrangement and the selection transistor. The interlayer insulation film is existed above a region including the word line, the dummy gate electrode and the selection transistor, and between the neighboring word lines, the dummy gate electrode and the selection transistor, and has a cavity between the neighboring word lines.
    Type: Application
    Filed: September 16, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Sachiyo ITO
  • Publication number: 20140284684
    Abstract: According to one embodiment, a semiconductor memory device includes a semiconductor substrate, a cell transistor, an extraction section, a guard ring, a first transistor, and a second transistor. The semiconductor substrate includes first, second, third, and fourth regions. The fourth region includes first and second portions. The cell transistor is provided on the first region and includes a first insulating film, a charge storage film, and a first electrode. The extraction section is provided on the second region and includes a second insulating film, and an extension electrode. The guard ring is provided on the third region and includes a third insulating. The first transistor is provided on the first portion and includes a fourth insulating, and a second electrode. The second transistor is provided on the second portion and includes a fifth insulating film, and a third electrode.
    Type: Application
    Filed: July 11, 2013
    Publication date: September 25, 2014
    Inventors: Yoshiko KATO, Tatsuya KATO
  • Publication number: 20140284685
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes: a stacked body including each of a plurality of electrode layers and each of a plurality of insulating layers stacked alternately; a first interlayer insulating film; a select gate electrode; a second interlayer insulating film; a pair of semiconductor layers; a first insulating film; a second insulating film; a third interlayer insulating film; a first contact electrode connected to one upper end of the pair of semiconductor layers; a second contact electrode connected to the other upper end of the pair of semiconductor layers; a third contact electrode connected to the second contact electrode; a first interconnect layer connected to the first contact electrode; and a second interconnect layer connected to the third contact electrode.
    Type: Application
    Filed: August 19, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshiro SHIMOJO, Tsuneo Uenaka, Megumi Ishiduki, Mitsuru Sato
  • Publication number: 20140284686
    Abstract: According to one embodiment, a method for manufacturing a semiconductor memory device includes forming a plurality of pillars and a plurality of sidewall films on a stacked body including a plurality of electrode layers stacked alternately with a plurality of insulating layers. The pillars are arranged in a first direction and a second direction intersecting the first direction at different pitches in the first direction and the second direction. The sidewall films are provided on outer circumferential surfaces of the pillars to extend in the first direction to be linked in the first direction and separated in the second direction. The method includes making a slit to divide the stacked body in the second direction by etching the stacked body under a region between the sidewall films adjacent to each other in the second direction using the pillars and the sidewall films as a mask.
    Type: Application
    Filed: August 20, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Sadatoshi MURAKAMI
  • Publication number: 20140284687
    Abstract: According to one embodiment, a nonvolatile memory device includes a plurality of electrodes provided on an under layer and arranged in parallel to the under layer, a semiconductor layer piercing one of the electrodes in the first direction, a memory film provided between the one of the electrodes and the semiconductor layer, and a bridge portion provided between the electrodes adjacent to each other. Each of the electrodes including a plurality of first layers having conductivity and a plurality of second layers having insulation properties, the first layers being stacked in a first direction perpendicular to the under layer, and each of the second layers being provided between the first layers adjacent to each other.
    Type: Application
    Filed: August 20, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Sadatoshi MURAKAMI
  • Publication number: 20140284688
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes a memory element region and a capacitance element region. The capacitance region including: a second stacked body, each of a plurality of second electrode layers and each of a plurality of second insulating layers being stacked alternately; a plurality of conductive layers; and a second insulating film provided between each of the plurality of conductive layers and each of the plurality of second electrode layers. In the capacitance element region, a first capacitor is made of one of the plurality of second insulating layers and a pair of the second electrode layers sandwiching the one of the plurality of second insulating layers, and a second capacitor is made of the second insulating film, and one of the plurality of second electrode layers and one of the plurality of conductive layers sandwiching the second insulating film.
    Type: Application
    Filed: August 20, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takahiro HIRAI, Masaru Kito
  • Publication number: 20140284689
    Abstract: In general, according to one embodiment, a nonvolatile semiconductor memory device includes a memory cell region and a peripheral region. The memory cell region includes first element isolation regions, first semiconductor regions, a first gate insulating film, a charge storage layer, a second gate insulating film, and a control gate electrode. The first element isolation regions separate a semiconductor layer and include a first insulating film. The first semiconductor regions are separated by the first element isolation regions. The peripheral region includes a second element isolation region a second insulating film. Each of the first element isolation regions includes a first and a second portion. A step is present between the first and the second portion. At least part of a side surface and a lower end of the second element isolation region are surrounded by the semiconductor layer.
    Type: Application
    Filed: August 30, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Karin TAKAYAMA, Koichi MATSUNO, Naoki KAI
  • Publication number: 20140284690
    Abstract: According to one embodiment, a semiconductor device includes: a semiconductor layer of a first conductivity type, and the semiconductor layer having a first and a second surfaces; a first conductive layer penetrating from the first surface side to the second surface side of the semiconductor layer; a first semiconductor region of a first conductivity type surrounding part of the first conductive layer on the second surface side of the semiconductor layer, a portion other than a front surface of the first semiconductor region being surrounded by the semiconductor layer; and a first insulating film provided between the first conductive layer and the semiconductor layer and between the first conductive layer and the first semiconductor region, a concentration of an impurity element contained in the first semiconductor region being higher than a concentration of an impurity element contained in the semiconductor layer.
    Type: Application
    Filed: September 4, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Norihisa Arai, Tsutomu Takahashi, Kazunori Masuda, Kazuo Hatakeyama
  • Publication number: 20140284691
    Abstract: According to one embodiment, a method is disclosed for manufacturing a semiconductor memory device. The method includes forming a first stopper film forming a lower gate layer, making a recess in the lower gate layer, filling a sacrificial film into the recess, forming a second stopper film, making an opening in the second stopper film, forming a stacked body. The stacked body includes electrode films and insulating films. The method includes, making a slit in the stacked body, making a hole in the stacked body, removing the sacrificial film via the hole, forming a memory film including a charge storage film. The method includes forming a channel body on a side wall of the memory film. An etching rate of the first stopper film and the second stopper film is lower than an etching rate of the electrode films and the insulating films.
    Type: Application
    Filed: September 4, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kazuhide Takamura, Ryota Katsumata, Masaru Kidoh, Yoshihiro Uozumi, Daigo Ichinose, Toru Matsuda
  • Publication number: 20140284692
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes: a stacked body including a plurality of electrode layers and a plurality of first insulating layers; a first channel body layer penetrating the stacked body; a memory film; an interlayer insulating film provided on the stacked body; a selection gate electrode provided on the interlayer insulating film; a second channel body layer penetrating the selection gate electrode and the interlayer insulating film and connected to the first channel body; a gate insulating film provided between the selection gate electrode and the second channel body layer; a second insulating layer provided on the gate insulating film and on the selection gate electrode; a contact layer provided on the second insulating layer; and a diffusion layer provided between the contact layer and the second insulating layer and connected to the second channel body layer and the contact layer.
    Type: Application
    Filed: September 6, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiro AKUTSU, Hiroshi SHINOHARA, Ryota KATSUMATA
  • Publication number: 20140284693
    Abstract: According one embodiment, a nonvolatile semiconductor memory device, includes: a stacked body, and each of a plurality of electrode layers and each of a plurality of insulating layers being stacked alternately in the a stacked body; a first interlayer insulating film on the stacked body; a gate electrode on the first interlayer insulating film; a second interlayer insulating film on the gate electrode; a semiconductor layer extended from an upper end of the second interlayer insulating film to a lower end of the stacked body; a first insulating film between the semiconductor layer and each of the plurality of electrode layers; and a second insulating film between the semiconductor layer and the gate electrode, a thickness of the semiconductor layer provided above an upper end of the gate electrode being thicker than a thickness of the semiconductor layer provided below the upper end of the gate electrode.
    Type: Application
    Filed: September 6, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Mitsuru SATO, Soichiro KITAZAKI, Ryu KATO, Masaru KITO, Ryota KATSUMATA
  • Publication number: 20140284694
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes: a stacked body, each of a plurality of electrode layers and each of a plurality of insulating layers being stacked alternately in the stacked body; an interlayer insulating film provided on the stacked body; a gate electrode provided on the interlayer insulating film; a semiconductor layer extending from an upper end of the gate electrode to a lower face of the stacked body; a first insulating film provided between the semiconductor layer and each of the plurality of electrode layers and including at least one layer of a nitride film; and a second insulating film provided between the gate electrode and the semiconductor layer and including at least one layer of a nitride film, a film thickness of at least a part of the second insulating film being thinner than a film thickness of the first insulating film.
    Type: Application
    Filed: September 6, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Soichirou Kitazaki, Mitsuru Sato
  • Publication number: 20140284695
    Abstract: According to example embodiments of inventive concepts, a semiconductor device includes: a substrate, and a stacked structure including interlayer insulating layers and gate electrodes alternately stacked on the substrate. The stacked structure defines a through-hole over the substrate. The gate electrodes each include a first portion between the through-hole and a second portion of the gate electrodes. A channel pattern may be in the through-hole. A tunneling layer may surround the channel pattern. A charge trap layer may surround the tunneling layer, and protective patterns may surround the first portions of the gate electrodes. The protective patterns may be between the first portions of the gate electrodes and the charge trap layer.
    Type: Application
    Filed: January 9, 2014
    Publication date: September 25, 2014
    Inventors: Jin-Yeon WON, Joon-Hee LEE, Seung-Woo PAEK, Dong-Seog EUN
  • Publication number: 20140284696
    Abstract: A method of fabricating a memory device is described. Generally, the method includes: forming a tunneling layer on a substrate; forming on the tunneling layer a multi-layer charge storing layer including at least a first charge storing layer comprising an oxygen-rich oxynitride overlying the tunneling layer, and a second charge storing layer overlying the first charge storing layer comprising a silicon-rich and nitrogen-rich oxynitride layer that is oxygen-lean relative to the first charge storing layer and comprises a majority of charge traps distributed in the multi-layer charge storing layer; and forming a blocking layer on the second oxynitride layer; and forming a gate layer on the blocking layer. Other embodiments are also described.
    Type: Application
    Filed: February 4, 2014
    Publication date: September 25, 2014
    Applicant: Cypress Semiconductor Corporation
    Inventors: Sagy Charel Levy, Krishnaswamy Ramkumar, Frederick B. Jenne, Sam G. Geha
  • Publication number: 20140284697
    Abstract: A vertical NAND string device includes a semiconductor channel, where at least one end portion of the semiconductor channel extends substantially perpendicular to a major surface of a substrate, at least one semiconductor or electrically conductive landing pad embedded in the semiconductor channel, a tunnel dielectric located adjacent to the semiconductor channel, a charge storage region located adjacent to the tunnel dielectric, a blocking dielectric located adjacent to the charge storage region and a plurality of control gate electrodes extending substantially parallel to the major surface of the substrate.
    Type: Application
    Filed: March 19, 2014
    Publication date: September 25, 2014
    Applicant: SanDisk Technologies, Inc.
    Inventors: Chi-Ming Wang, Johann Alsmeier, Henry Chien, Xiying Costa, Yung-Tin Chen, Christopher Petti
  • Publication number: 20140284698
    Abstract: A semiconductor device includes a memory cell transistor that is formed via a first gate insulating film on an active region of a memory cell region and has a gate electrode including a first charge storage layer, a first interelectrode insulating film, and a first control gate electrode film. A transistor, which includes a second gate insulating film on the active region or a peripheral circuit region and a gate electrode including a second charge storage layer, a second interelectrode insulating film, and a second control gate electrode film, is also provided. A groove with a funnel shape is formed in a trap film of the second charge storage layer, and the second control gate electrode film and the polysilicon film of the second charge storage layer are interconnected via the groove.
    Type: Application
    Filed: August 30, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Satoshi NAGASHIMA
  • Publication number: 20140284699
    Abstract: According to one embodiment, a semiconductor memory device includes a substrate, a stacked body, a channel body, a memory film, first and second insulating separation films, a first and a second inter-layer insulating films, a selection gate, a conductive layer, and resistance elements. The substrate includes a memory cell array region and a peripheral region. The stacked body includes electrode films and insulating films. The channel body extends in a stacking direction. The memory film includes a charge storage film. The first insulating separation films divide the stacked body. The first and the second inter-layer insulating films are on the stacked body and on the conductive layer, respectively. The selection gate is on the first inter-layer insulating film. The conductive layer is on the peripheral region. The resistance elements are on the second inter-layer insulating film. The second insulating separation films divide the conductive layer.
    Type: Application
    Filed: September 5, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Hiroyasu TANAKA
  • Publication number: 20140284700
    Abstract: According to one embodiment, a semiconductor device includes a semiconductor layer having an opening formed therein, a first insulating layer disposed on a bottom surface of the opening and on a sidewall of the opening, a second insulating layer disposed on the sidewall of the opening above the first insulating layer, the second insulating layer being thinner than the first insulating layer, a field plate electrode disposed on the first insulating layer and the second insulating layer and having a recess extending from an upper surface of the field plate electrode towards the bottom surface of the opening, and a first layer disposed in the recess and including a material that is different from a material of the field plate electrode.
    Type: Application
    Filed: September 3, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tetsuro NOZU
  • Publication number: 20140284701
    Abstract: A MOSFET includes an active region formed on an SOI substrate. A buried well is formed in the active region. A drain region having the first conductivity type is formed in the active region and spaced laterally from a source region and the buried well. A body region is formed in the active region between the source and drain regions on the buried well, and a drift region is formed in the active region between the drain and body regions on at least a portion of the buried well. A shielding structure is formed proximate the upper surface of the active region, overlapping a gate. During conduction, the buried well forms a PN junction with the drift region which, in conjunction with the shielding structure, depletes the drift region. The MOSFET is configured to sustain a linear mode of operation of an inversion channel formed under the gate.
    Type: Application
    Filed: June 3, 2014
    Publication date: September 25, 2014
    Applicant: Azure Silicon LLC
    Inventor: Jacek Korec
  • Publication number: 20140284702
    Abstract: A field plate trench transistor having a semiconductor body. In one embodiment the semiconductor has a trench structure and an electrode structure embedded in the trench structure. The electrode structure being electrically insulated from the semiconductor body by an insulation structure and having a gate electrode structure and a field electrode structure. The field plate trench transistor has a voltage divider configured such that the field electrode structure is set to a potential lying between source and drain potentials.
    Type: Application
    Filed: June 5, 2014
    Publication date: September 25, 2014
    Inventors: Franz Hirler, Walter Rieger, Thorsten Meyer, Wolfgang Klein, Frank Pfirsch
  • Publication number: 20140284703
    Abstract: In one embodiment, a method of making a VDMOS transistor can include: (i) etching an oxide layer formed on a surface of an epitaxial structure to define an active region of the VDMOS; (ii) injecting and diffusing a first dopant into the active region to form a doping region; (iii) forming a gate oxide layer on the active region; (iv) depositing polysilicon on the gate oxide layer, and etching the polysilicon to form a gate; (v) injecting a second dopant at an end of the gate to form a source, where the first and second dopants have opposite types; (vi) forming a contact hole adjacent to the gate, and injecting a third dopant into the contact hole, where the first and third dopants have a same type; (vii) depositing and etching aluminum on a chip surface; and (viii) coating the aluminum and chip surface with a passivation layer.
    Type: Application
    Filed: February 19, 2014
    Publication date: September 25, 2014
    Applicant: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Zhongping Liao
  • Publication number: 20140284704
    Abstract: A semiconductor device comprising: a Metal Oxide Semiconductor Field Effect Transistor including: a semiconductor substrate including a first semiconductor layer of a first conductivity type; second semiconductor layers of a second conductivity type extending in a depth direction from one surface of the semiconductor substrate, and having space each other; a first diode including a fifth semiconductor layer of the second conductivity type contacting the second semiconductor layer in one surface side of the semiconductor substrate, the first semiconductor layer and the second semiconductor layers; and an anode of the second diode connected to an anode of the first diode.
    Type: Application
    Filed: April 7, 2014
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Wataru SAITO, Syotaro ONO, Toshiyuki NAKA, Shunji TANIUCHI, Hiroaki YAMASHITA
  • Publication number: 20140284705
    Abstract: In the manufacturing steps of a super-junction power MOSFET having a drift region having a super junction structure, after the super junction structure is formed, introduction of a body region and the like and heat treatment related thereto are typically performed. However, in the process thereof, a dopant in each of P-type column regions and the like included in the super junction structure is diffused to result in a scattered dopant profile. This causes problems such as degradation of a breakdown voltage when a reverse bias voltage is applied between a drain and a source and an increase in ON resistance. According to the present invention, in a method of manufacturing a silicon-based vertical planar power MOSFET, a body region forming a channel region is formed by selective epitaxial growth.
    Type: Application
    Filed: June 10, 2014
    Publication date: September 25, 2014
    Inventors: Satoshi EGUCHI, Yuya ABIKO, Junichi KOGURE
  • Publication number: 20140284706
    Abstract: A semiconductor device includes a buried layer having a first dopant type in a substrate. The semiconductor device includes a first layer having the first dopant type over the buried layer. The semiconductor device includes at least one first well of a second dopant type disposed in the first layer. The semiconductor device includes an implantation region of the second dopant type in a sidewall of the first layer, wherein the implantation region is below the at least one first well. The semiconductor device includes a first source region disposed in the at least one first well; and at least one gate disposed on top of the first well and the first layer. The semiconductor device includes a metal electrode extending from the buried layer to a drain contact, wherein the metal electrode is insulated from the first layer and the at least one first well by an insulation layer.
    Type: Application
    Filed: June 11, 2014
    Publication date: September 25, 2014
    Inventors: Chih-Chang CHENG, Ruey-Hsin LIU, Chih-Wen YAO, Hsiao Chin TUAN
  • Publication number: 20140284707
    Abstract: According to one embodiment, a semiconductor memory device includes a first semiconductor layer, a second semiconductor layer, a first electrode, and a second electrode. The first semiconductor layer is a first conductivity type. The second semiconductor layer is provided in a surface region of the first semiconductor layer and is the first conductivity type. The first electrode is provided inside a first trench extending in the first direction and opened to a surface of the second semiconductor layer. The second electrode is provided in a second trench extending in a second direction crossing the first direction and opened to the surface of the second semiconductor layer. A dimension from the surface of the second semiconductor layer to a lower end of the second electrode is shorter than a dimension from the surface of the second semiconductor layer to a lower end of the first electrode.
    Type: Application
    Filed: September 11, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Keiko Kawamura, Hitoshi Kobayashi, Yusuke Kawaguchi, Shunsuke Katoh
  • Publication number: 20140284708
    Abstract: According to an embodiment, a method for manufacturing a semiconductor device includes forming a gate trench extending into a first semiconductor layer; forming a gate insulating film on an internal wall of the gate trench; forming a polysilicon in the gate trench; etching the polysilicon into the gate trench; forming an interlayer insulating film on the polysilicon; etching the first semiconductor layer so as to project the interlayer insulating film from the first semiconductor layer; forming a second semiconductor layer on the first semiconductor layer; forming a third semiconductor layer on the second semiconductor layer; forming a sidewall contacting a side face of the interlayer insulating film; forming a fourth semiconductor layer of the second conductivity type in the second semiconductor layer; and forming a first electrode electrically connected to the third semiconductor layer and the fourth semiconductor layer.
    Type: Application
    Filed: January 21, 2014
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsuya Nishiwaki, Yoshitaka Hokomoto, Masatoshi Arai
  • Publication number: 20140284709
    Abstract: A buried layer of a second conductivity type and a lower layer of a second conductivity type are formed in a drift layer. A boundary insulating film is formed in the boundary between the lateral portion of the buried layer of a second conductivity type and the drift layer. The lower layer of a second conductivity type is in contact with the lower end of the buried layer of a second conductivity type and the lower end of the boundary insulating film. The buried layer of a second conductivity type is electrically connected to a source electrode. A high-concentration layer of a second conductivity type is formed in the surface layer of the buried layer of a second conductivity type.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 25, 2014
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventors: Akihiro SHIMOMURA, Yutaka AKIYAMA, Saya SHIMOMURA, Yasutaka NAKASHIBA
  • Publication number: 20140284710
    Abstract: In one embodiment, a semiconductor device includes a multi-portion shield electrode structure formed in a drift region. The shield electrode includes a wide portion formed in proximity to a channel side of the drift region, and a narrow portion formed deeper in the drift region. The narrow portion is separated from the drift region by a thicker dielectric region, and the wide portion is separated from the drift region by a thinner dielectric region. That portion of the drift region in proximity to the wide portion can have a higher dopant concentration than other portions of the drift region.
    Type: Application
    Filed: June 3, 2014
    Publication date: September 25, 2014
    Applicant: Semiconductor Components Industries, LLC
    Inventor: Zia Hossain
  • Publication number: 20140284711
    Abstract: A semiconductor apparatus includes a drain region of a first-conductivity type, a drain electrode electrically coupled to the drain region, and a semiconductor layer of the first-conductivity type formed onto the drain region and having a first impurity concentration. The semiconductor apparatus further includes: a source region of the first-conductivity type formed on the semiconductor layer and having a second impurity concentration; a first source electrode electrically coupled to the source region; and a gate electrode formed via an insulating layer. The one end of the gate electrode is in a depth of the source region, and the other end is in a depth of the semiconductor layer or the drain region. A second source electrode is provided in the semiconductor layer under the gate electrodes via an insulating layer. A second spacing between the second source electrodes is larger than a first spacing between the gate electrodes.
    Type: Application
    Filed: September 10, 2013
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shunsuke Katoh, Yusuke Kawaguchi
  • Publication number: 20140284712
    Abstract: A semiconductor device includes: an n-type first source region and first drain region formed in a surface of a p-type epitaxial layer; an n-type first source drift region and first drain drift region formed so as to individually surround the first source region and the first drain region; and a p-type first diffusion region formed in a first channel region and having a higher concentration than the epitaxial layer, the semiconductor device having p-type first withstand voltage maintaining regions formed between the first diffusion region, and the first source drift region and first drain drift region respectively, the first withstand voltage maintaining regions having a lower concentration than the first diffusion region.
    Type: Application
    Filed: March 18, 2014
    Publication date: September 25, 2014
    Applicant: ROHM CO., LTD.
    Inventor: Yohei UJIIE
  • Publication number: 20140284713
    Abstract: A transfer transistor includes a pair of first diffusion regions and a gate electrode layer. The pair of first diffusion regions are formed in a surface of a semiconductor substrate, and are each connected to a contact. The gate electrode layer is formed on the semiconductor substrate via a gate insulating layer and has a pair of openings each surrounding the contact.
    Type: Application
    Filed: July 22, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiroyuki Kutsukake, Masato Endo
  • Publication number: 20140284714
    Abstract: Disclosed is a semiconductor device that includes a first MOS transistor having a predetermined size and a second MOS transistor having a lager size than the first MOS transistor. The first MOS transistor is divided into two or more sections, each paired with a corresponding section of the second MOS transistor to form a unit cell. As the unit cell is cyclically formed on a substrate, the current mirror ratio between the total size of the first MOS transistor and the total size of the second MOS transistor remains unaffected by the nonuniformity of position-dependent temperature distribution.
    Type: Application
    Filed: February 27, 2014
    Publication date: September 25, 2014
    Inventors: Kenji Miyakoshi, Youhei Yanagida, Hiroki Kimura, Takayuki Ooshima
  • Publication number: 20140284715
    Abstract: According to one embodiment, in a method of manufacturing a semiconductor device, a plurality of first impurity layers of a second conductivity type are formed. A first epitaxial layer of a first conductivity type is formed. A plurality of second impurity layers of a second conductivity type are formed. Thereafter, a second epitaxial layer of a first conductivity type having a smaller thickness than the first epitaxial layer is formed. The first impurity layers of a second conductivity type and the second impurity layers of a second conductivity type are bonded to each other by heat treatment thus forming a plurality of pillar layers of a second conductivity type. A second semiconductor layer of a second conductivity type which is brought into contact with the pillar layers of a second conductivity type is formed over a surface of the second epitaxial layer.
    Type: Application
    Filed: September 3, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Tatsuo FUKUDA
  • Publication number: 20140284716
    Abstract: A device includes a semiconductor substrate, source and drain regions in the semiconductor substrate and having a first conductivity type, a gate structure supported by the semiconductor substrate between the source and drain regions, a first well region in the semiconductor substrate, having a second conductivity type, and in which a channel region is formed under the gate structure during operation, and a second well region adjacent the first well region, having the second conductivity type, and having a higher dopant concentration than the first well region, to establish a path to carry charge carriers of the second conductivity type away from a parasitic bipolar transistor involving a junction between the channel region and the source region.
    Type: Application
    Filed: June 11, 2014
    Publication date: September 25, 2014
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Xiaowei Ren, David C. Burdeaux, Robert P. Davidson, Michele L. Miera
  • Publication number: 20140284717
    Abstract: Diodes and resistors for integrated circuits are provided. Deep trenches (DTs) are integrated into the diodes and resistors for the purposes of thermal conduction. The deep trenches facilitate conduction of heat from a semiconductor-on-insulator substrate to a bulk substrate. Semiconductor fins may be formed to align with the deep trenches.
    Type: Application
    Filed: March 25, 2013
    Publication date: September 25, 2014
    Applicant: International Business Machines Corporation
    Inventors: Theodorus Eduardus Standaert, Kangguo Cheng, Junjun Li, Balasubramanian Pranatharthi Haran, Shom Ponoth, Tenko Yamashita
  • Publication number: 20140284718
    Abstract: Disclosed are a method of manufacturing a reduced graphene oxide pattern which includes forming a graphene oxide pattern on a substrate and providing the graphene oxide pattern with a white light pulse to reduce the graphene oxide, a reduced graphene oxide obtained by the method, and an electronic device and a thin film transistor including the reduced graphene oxide.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 25, 2014
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jung Ah LIM, Yong-Won SONG, Jae-Min HONG, Joo Young CHANG
  • Publication number: 20140284719
    Abstract: According to an embodiment, the invention provides an nFET/pFET pair of finFETs formed on a gate stack. At least one fin extends into a source drain region of each of the FET pair and a carbon doped silicon (Si:C) layer is formed on each such fin. Another aspect of the invention is a process flow to enable dual in-situ doped epitaxy to fill the nFET and pFET source drain with different epi materials while avoiding a ridge in the hard cap on the gate between the pair of finFETS. The gate spacer in both of the pair can be the same thickness. The extension region of both of the pair of finFETs can be activated by a single anneal.
    Type: Application
    Filed: March 21, 2013
    Publication date: September 25, 2014
    Applicant: International Business Machines Corporation
    Inventors: Ali Khakifirooz, Kangguo Cheng, Alexander Reznicek
  • Publication number: 20140284720
    Abstract: A semiconductor device includes a substrate, a gate positioned on the substrate, a drain region and a source region formed at respective two sides of the gate in the substrate, at least a first doped region formed in the drain region, and at least a first well having the first doped region formed therein. The source region and the drain region include a first conductivity type, the first doped region and the first well include a second conductivity type, and the first conductivity type and the second conductivity type are complementary to each other.
    Type: Application
    Filed: March 21, 2013
    Publication date: September 25, 2014
    Applicant: UNITED MICROELECTRONICS CORP.
    Inventors: Lu-An Chen, Tien-Hao Tang
  • Publication number: 20140284721
    Abstract: A method includes patterning a fin on a semiconductor substrate, depositing a local trench isolation (LTI) layer on the semiconductor substrate, patterning a gate stack over a channel region of the fin and over a portion of the LTI layer, depositing a first capping layer over exposed portions of the LTI layer, performing an etching process to remove oxide material from exposed portions of the fin, and epitaxially growing a semiconductor material from exposed portions of the fin to define active regions.
    Type: Application
    Filed: June 5, 2014
    Publication date: September 25, 2014
    Inventors: Emre Alptekin, Ravikumar Ramachandran, Viraj Y. Sardesai, Reinaldo A. Vega