Patents Assigned to Elpida Memory, Inc.
  • Publication number: 20140197495
    Abstract: A semiconductor device may include an n-MOS transistor, and a p-MOS transistor. The p-MOS transistor may include, but is not limited to, a gate insulating film and a gate electrode. The gate electrode may have an adjacent portion that is adjacent to the gate insulating film. The adjacent portion may include a polysilicon that contains an n-type dopant and a p-type dopant.
    Type: Application
    Filed: March 18, 2014
    Publication date: July 17, 2014
    Applicant: Elpida Memory, Inc.
    Inventor: Yoshikazu MORIWAKI
  • Publication number: 20140191416
    Abstract: A semiconductor device comprises a first external terminal having a first size, a plurality of second external terminals each having a second size smaller than the first size, an external terminal area in which the first external terminal and the second external terminals are arranged, and a plurality of wires connecting between the second external terminals and a plurality of circuits formed adjacent to the external terminal area and corresponding to the second external terminals. The second external terminals and the wires constitute a plurality of interfaces. Each of the interfaces includes at least one adjustment portion that adjusts a time constant of the wire so that the wires have the same time constant. At least part of the adjustment portions is located in a margin area produced in the external terminal area by a difference between the first size and the second size.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Tomohiro KITANO, Hisayuki NAGAMINE
  • Patent number: 8772123
    Abstract: A method for forming a DRAM MIM capacitor stack having low leakage current and low EOT involves the use of an compound high k dielectric material. The dielectric material further comprises a dopant. One component of the compound high k dielectric material is present in a concentration between about 30 atomic % and about 80 atomic % and more preferably between about 40 atomic % and about 60 atomic %. In some embodiments, the compound high k dielectric material comprises an alloy of TiO2 and ZrO2 and further comprises a dopant of Al2O3. In some embodiments, the compound high k dielectric material comprises an admixture of TiO2 and HfO2 and further comprises a dopant of Al2O3.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: July 8, 2014
    Assignees: Intermolecular, Inc., Elpida Memory, Inc.
    Inventors: Hanhong Chen, Sandra G. Malhotra, Wim Deweerd, Hiroyuki Ode
  • Publication number: 20140183695
    Abstract: A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a flash layer between the dielectric layer and the first electrode layer. A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a capping layer between the dielectric layer and the second electrode layer. The flash layer and the capping layer can be formed using an atomic layer deposition (ALD) technique. The precursor materials used for forming the flash layer and the capping layer are selected such they include at least one metal-oxygen bond. Additionally, the precursor materials are selected to also include “bulky” ligands.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Applicants: ELPIDA MEMORY, INC, INTERMOLECULAR, INC.
    Inventors: Sandra G. Malhotra, Hiroyuki Ode, Xiangxin Rui
  • Publication number: 20140183704
    Abstract: A method of manufacturing a semiconductor device including a semiconductor substrate having first and second surfaces and a peripheral edge, the first and second surfaces being opposite to each other, includes forming an inter-layer insulator having a guard ring on the first surface, adjacent to the peripheral edge, forming a first groove on the second surface and adjacent to the peripheral edge, and forming a through electrode that penetrates the second surface to the inter-layer insulator near the first groove and on an opposite side of the groove with respect to the peripheral edge.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Akira Ide, Koji Torii
  • Publication number: 20140183705
    Abstract: A semiconductor device includes: a plurality of semiconductor chips stacked on each other, each of the plurality of semiconductor chips having a semiconductor substrate and a wiring layer; a through electrode penetrating the semiconductor substrate in a thickness direction and electrically connected to each other between the semiconductor chips adjacent to each other; a conductor penetrating the semiconductor substrate in the thickness direction and not electrically connected between the other semiconductor chips; and an insulating separator penetrating the semiconductor substrate in the thickness direction and formed in a shape of a ring surrounding the conductor.
    Type: Application
    Filed: March 4, 2014
    Publication date: July 3, 2014
    Applicant: Elpida Memory, Inc.
    Inventor: Nobuyuki NAKAMURA
  • Publication number: 20140185350
    Abstract: A method for reading data from a plurality of DRAM devices connected to common command, address, and data busses. A clock signal is provided to the plurality of DRAM devices. A read command and address to the plurality of DRAM devices on the command and address busses in synchronization with the clock signal. A read clock signal is provided to the plurality of DRAM devices to initiate a read operation in one of the plurality of DRAM devices that is selected by the address. The one DRAM device delays the read clock signal by an amount based on a speed of the one of the plurality of DRAM devices to generate. First delayed read clock and second delayed read clock signals are provided. The read data is received on the data bus in synchronization with the second delayed read clock signal.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: Elpida Memory, Inc.
    Inventor: Chikara KONDO
  • Publication number: 20140184284
    Abstract: A method for synchronizing an output clock signal with an input clock signal in a delay locked loop. A first count values decreasing the number of bypassed elements in a differential delay line until an edge of the output clock signal is delayed relative to an edge of the input clock signal or the first count value reaches a first count final value if the first count value reaches the first count final value, a second count value is adjusting to decrease the number of bypassed elements in a single-ended delay line until the edge of the output clock signal is delayed relative to the edge of the input clock signal. A third count value is adjusted to decrease the delay of an interpolator until the edge of the output clock signal is no longer delayed with respect to the edge of the input clock signal.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: Elpida Memory, Inc.
    Inventor: Toru ISHIKAWA
  • Publication number: 20140187015
    Abstract: A first electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the first electrode layer contains a conductive base layer and conductive metal oxide layer. A second electrode layer for a Metal-Insulator-Metal (MIM) DRAM capacitor is formed wherein the second electrode layer contains a conductive base layer and conductive metal oxide layer. In some embodiments, both the first electrode layer and the second electrode layer contain a conductive base layer and conductive metal oxide layer.
    Type: Application
    Filed: December 27, 2012
    Publication date: July 3, 2014
    Applicants: ELPIDA MEMORY, INC, INTERMOLECULAR, INC.
    Inventors: Xiangxin Rui, Mitsuhiro Horikawa, Hiroyuki Ode, Karthik Ramani
  • Publication number: 20140187018
    Abstract: A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a flash layer between the dielectric layer and the first electrode layer. A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a capping layer between the dielectric layer and the second electrode layer. The flash layer and the capping layer can be formed using an atomic layer deposition (ALD) technique. The precursor materials used for forming the flash layer and the capping layer are selected such they include at least one metal-oxygen bond. Additionally, the precursor materials are selected to also include “bulky” ligands.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Applicants: ELPIDA MEMORY, INC, INTERMOLECULAR, INC.
    Inventors: Sandra G. Malhotra, Hiroyuki Ode, Xiangxin Rui
  • Patent number: 8765569
    Abstract: A metal oxide bilayer second electrode for a MIM DRAM capacitor is formed wherein the layer of the electrode that is in contact with the dielectric layer (i.e. bottom layer) has a desired composition and crystal structure. An example is crystalline MoO2 if the dielectric layer is TiO2 in the rutile phase. The other component of the bilayer (i.e. top layer) is a sub-oxide of the same material as the bottom layer. The top layer serves to protect the bottom layer from oxidation during subsequent PMA or other DRAM fabrication steps by reacting with any oxygen species before they can reach the bottom layer of the bilayer second electrode.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: July 1, 2014
    Assignees: Intermolecular, Inc., Elpida Memory, Inc.
    Inventors: Hanhong Chen, Wim Deweerd, Hiroyuki Ode
  • Publication number: 20140177339
    Abstract: A nonvolatile semiconductor memory device includes a first string including a first number of memory cells connected in series each storing therein information in a nonvolatile manner; and a second string including a second number of memory cells connected in series each storing therein information in a nonvolatile manner, wherein the second number is smaller than the first number.
    Type: Application
    Filed: September 27, 2013
    Publication date: June 26, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Naoharu SHINOZAKI, Masao TAGUCHI, Takahiro HATADA, Satoru SUGIMOTO, Satoshi SAKURAKAWA
  • Publication number: 20140173173
    Abstract: A method includes providing a partition command to a device that includes a memory array including a plurality of memory cells. In response to the providing of the partition command, the memory cells of the memory array are partitioned to select a portion of the memory array. In response to the providing of the partition command, one of bit numbers that are to be stored in one memory cell is selected, so that each of the memory cells included in the selected portion stores data with the selected one of the bit numbers.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Luca Battu, Antonino Geraci, Mauro Pagliato, Stefano Surico
  • Publication number: 20140170833
    Abstract: A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a capacitor stack including an oxygen donor dopant incorporated within the dielectric layer. The oxygen donor dopants may be incorporated within the dielectric layer during the formation of the dielectric layer. The oxygen donor materials provide oxygen to the dielectric layer and reduce the concentration of oxygen vacancies, thus reducing the leakage current.
    Type: Application
    Filed: December 17, 2012
    Publication date: June 19, 2014
    Applicants: ELPIDA MEMORY, INC, INTERMOLECULAR, INC.
    Inventors: Xiangxin Rui, Sergey Barabash
  • Publication number: 20140167221
    Abstract: A method for reducing the leakage current in DRAM Metal-Insulator-Metal capacitors includes forming a capacitor stack including an oxygen donor layer inserted between the dielectric layer and at least one of the two electrode layers. In some embodiments, the dielectric layer may be doped with an oxygen donor dopant. The oxygen donor materials provide oxygen to the dielectric layer and reduce the concentration of oxygen vacancies, thus reducing the leakage current.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicants: ELPIDA MEMORY, INC, INTERMOLECULAR, INC.
    Inventors: Xiangxin Rui, Sergey Barabash
  • Publication number: 20140169111
    Abstract: A method for carrying out read and write operations in a synchronous memory device having a shared I/O, includes receiving a read command directed to a first internal memory bank during a first timeslot, activating the first internal memory bank to access read data at a read address requested by the read command, receiving a write command directed to a second internal memory bank during a second timeslot later than the first timeslot, determining whether a data collision between the read data for output to the shared I/O with normal read latency and write data to be received on the shared I/O with normal write latency would occur, and receiving the write data on the shared I/O with the normal write latency during a third timeslot later than the second timeslot.
    Type: Application
    Filed: February 10, 2014
    Publication date: June 19, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Kazuhiko Kajigaya, Tomonori Sekiguchi, Kazuo Ono
  • Publication number: 20140169057
    Abstract: A method for accessing a plurality of DRAM devices each having a plurality of banks, the plurality of DRAM devices being interconnected to receive common address and command signals. The method includes receiving a first chip selection address and a first bank address with an active command to activate a first bank in a first DRAM device of the plurality of DRAM devices. A first bank active flag is set, corresponding to the first bank address, in the first DRAM device of the plurality of DRAM devices. A second bank address with a column command is received. A second bank is accessed in a second DRAM device of the plurality of DRAM devices having a set bank active flag corresponding to the second bank address.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Applicant: Elpida Memory, Inc.
    Inventor: Hideyuki Yoko
  • Publication number: 20140167125
    Abstract: A semiconductor device capable of increasing ON current while reducing channel resistance and allowing transistors to operate independently and stably, having a fin formed to protrude from the bottom of a gate electrode trench, a gate insulating film covering the surfaces of the gate electrode trench and the fin, a gate electrode embedded in a lower part of the gate electrode trench and formed to stride over the fin via the gate insulating film, a first impurity diffusion region arranged on a first side face, and a second impurity diffusion region arranged on a second side face.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Kiyonori OYU, Kensuke OKONOGI, Kazuto MORI
  • Publication number: 20140151791
    Abstract: A semiconductor device comprises: a memory cell region having a first transistor and a peripheral circuit region having a second transistor. The first transistor has a first source electrode and a first drain electrode, a first buried gate insulating film which is formed along an inner wall of a trench and whose relative dielectric constant is higher than a relative dielectric constant of silicon oxide, and a buried gate electrode. The second transistor has a second source electrode and a second drain electrode, a first on-substrate gate insulating film whose relative dielectric constant is higher than a relative dielectric constant of silicon oxide, and an on-substrate gate electrode. A first Hf content percentage, which is a content percentage of hafnium in the first buried gate insulating film, is different from a second Hf content percentage, which is a content percentage of hafnium in the first on-substrate gate insulating film.
    Type: Application
    Filed: May 22, 2013
    Publication date: June 5, 2014
    Applicant: Elpida Memory, Inc.
    Inventor: Kanta SAINO
  • Publication number: 20140152380
    Abstract: Disclosed herein is a device that includes a bias line to which a bias current flows, a switch circuit controlling an amount of the bias current based on a control signal, a control line to which the control signal is supplied, and a cancellation circuit substantially cancelling a potential fluctuation of the bias line caused by changing the control signal, the potential fluctuation propagating via a parasitic capacitance between the control line and the bias line.
    Type: Application
    Filed: February 6, 2014
    Publication date: June 5, 2014
    Applicant: Elpida Memory, Inc.
    Inventors: Hideyuki YOKOU, Isao NAKAMURA, Manabu ISHIMATSU