Patents Assigned to Elpida Memory, Inc.
  • Publication number: 20130228877
    Abstract: Disclosed herein is a device that includes: a plurality of first standard cells arranged on a semiconductor substrate in a first direction, each of the first standard cells including at least one field-effect transistor; and a first power supply wiring extending in the first direction along one end of the first standard cells in a second direction. The field-effect transistor including a gate electrode formed on a gate wiring layer. The first power supply wiring being formed on the gate wiring layer.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 5, 2013
    Applicant: ELPIDA MEMORY, INC.
    Inventors: Satoru Sugimoto, Takanari Shimizu
  • Publication number: 20130229857
    Abstract: A semiconductor device comprises a memory cell including a capacitor and a select transistor with a floating body structure, a bit line connected to the select transistor, a bit line control circuit, and a sense amplifier amplifying a signal read out from the memory cell. The bit line control circuit sets the bit line to a first potential during a non-access period of the memory cell, and thereafter sets the bit line to a second potential during an access period of the memory cell. Thereby, the data retention time can be prolonged by reducing leak current at a data storage node of the memory cell so that an average consumption current for the data retention can be reduced.
    Type: Application
    Filed: April 17, 2013
    Publication date: September 5, 2013
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Kazuhiko KAJIGAYA
  • Publication number: 20130228837
    Abstract: A semiconductor device according to this invention includes a support film that supports a lower electrode of a capacitor at an upper portion, and the support film includes a first insulating material having a stress within a range of +700 MPa to ?700 MPa. Use of such a support film prevents a phenomenon in which the capacitor lower electrode is twisted. Preferably, the support film has a rate etched by hydrofluoric acid of 1.0 nm/sec or less and more preferably, the support film includes a silicon carbon nitride film.
    Type: Application
    Filed: February 27, 2013
    Publication date: September 5, 2013
    Applicant: Elpida Memory, Inc.
    Inventors: Mitsunari SUKEKAWA, Takayuki MATSUI
  • Publication number: 20130229870
    Abstract: A semiconductor random access memory device includes a memory cell including a resistor whose resistance varies by formation and disappearance of a filament due to an oxidation-reduction reaction of metal ions, a memory area configured to include a first memory area operable in a nonvolatile mode in which a stored content thereof is not lost by a power-off event, and a second memory area operable in a volatile mode in which the stored content thereof is lost by the power-off event, each of the first memory area and the second memory area including the plurality of the memory cells, a register circuit that stores information including a first address information indicating the first memory area, and a second address information indicating the second memory area, and a control circuit that controls the nonvolatile mode, and the volatile mode, with reference to the information stored in the register circuit.
    Type: Application
    Filed: April 12, 2013
    Publication date: September 5, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Kazuhiko KAJIGAYA
  • Publication number: 20130228935
    Abstract: Disclosed herein is a semiconductor device includes: a plurality of first power supply wirings provided on a first wiring layer and extending in a first direction; a plurality of second power supply wirings provided on a second wiring layer different from the first wiring layer and extending in a second direction intersecting the first direction; a signal wiring provided on the second wiring layer and extending in the second direction; and a plurality of through-hole conductors each electrically connecting an associated one of the first power supply wirings to an associated one of the second power supply wirings. At least a part of the first power supply wirings have a notch in a portion intersecting the signal wiring.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 5, 2013
    Applicant: Elpida Memory, Inc.
    Inventors: Yoshimi Terui, Kazuhiko Matsuki
  • Patent number: 8525578
    Abstract: Such a device is disclosed that includes a first ladder fuse for which blowing points are arranged at a first coordinate and a second ladder fuse for which blowing points are arranged at a second coordinate. When adjustment data for adjusting circuit characteristics is within a first range, a trimming operation is performed on both the first and second ladder fuses, and when the adjustment data for adjusting the circuit characteristics is within a second range, the trimming operation is performed on the second ladder fuse without performing the trimming operation on the first ladder fuse. This configuration eliminates a necessity of irradiation on the first ladder fuse with a laser when the adjustment data is within the second range.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: September 3, 2013
    Assignee: Elpida Memory, Inc.
    Inventor: Shigeyuki Nakazawa
  • Patent number: 8525563
    Abstract: Disclosed herein is a device that includes a coarse adjusting circuit generating first and second clock signals having different phases from each other, and a fine adjusting circuit generating a third clock signal having a phase between a phase of the first clock signal and a phase of the second clock signal. The fine adjusting circuit includes a plurality of first transistors receiving the first clock signal and a plurality of second transistors receiving the second clock signal. The fine adjusting circuit controls the phase of the third clock signal by synthesizing the first clock signal output from selected zero or more of the first transistors based on adjustment codes and the second clock signal output from selected zero or more of the second transistors based on the adjustment codes. The adjustment codes are not a binary system.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: September 3, 2013
    Assignee: Elpida Memory, Inc.
    Inventor: Yutaka Uemura
  • Patent number: 8527820
    Abstract: A semiconductor device includes a first management area storing a plurality of inspection results, the plurality of inspection results being obtained by executing inspections for each of a plurality of storage areas which store a plurality of data; and a second management area storing the plurality of inspection results. The first and second management areas are independent from each other.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: September 3, 2013
    Assignee: Elpida Memory, Inc.
    Inventor: Shin Ito
  • Publication number: 20130223152
    Abstract: A clock generator or oscillating circuit is provided to generate a clock signal with high Power Supply Rejection Ratio (PSSR), or a stable clock signal that is resistant to variations in the power supply. The clock generator or oscillating circuit may also adjust the clock period (T) of the clock signal, either or both upwards and downwards, around its central value to compensate fabrication process variations.
    Type: Application
    Filed: March 14, 2013
    Publication date: August 29, 2013
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130223167
    Abstract: A system, includes a controller including a plurality of first external terminals configured to supply a command, a clock signal and an address, and communicate a data, and communicate a strobe signal related to the data, and a semiconductor memory device including a plurality of second external terminals corresponding to the plurality of first external terminals, one of the plurality of first external terminals and one of the plurality of second external terminals transferring an information specifying a length of a preamble of the strobe signal before the semiconductor memory device communicates the data,
    Type: Application
    Filed: March 15, 2013
    Publication date: August 29, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130223170
    Abstract: A semiconductor memory device comprises: plurality of global bit lines; plurality of sense amplifier circuits each connected to corresponding one of the plurality of global bit lines; plurality of column selection lines each of which is connected to or disconnected from corresponding one of the plurality of sense amplifier circuits according to column address information; and plurality of local bit lines including first local bit line and second local bit line. The first local bit line is connected to or disconnected from corresponding one of the plurality of global bit lines according to first row address information different from column address information. The second local bit line replaces first local bit line when defect is present in first local bit line and is connected to or disconnected from corresponding global bit line according to second row address information different from column address information.
    Type: Application
    Filed: February 25, 2013
    Publication date: August 29, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130227229
    Abstract: A semiconductor device includes a command terminal, a plurality of memory banks, a control circuit and an output circuit. The control circuit is configured to respond to each of issuance of a read command, that is supplied to the command terminal, to perform a read operation on any one of the memory banks so that the any one of the memory banks output a plurality of read data sets. The output circuit receives the read data sets and outputs the read data sets to outside in response to a clock signal so that a first interval substantially the same as a period of the clock signal or longer than the period of the clock signal is interposed between the read data sets.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 29, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Elpida Memory, Inc.
  • Patent number: 8520449
    Abstract: A semiconductor device has a hierarchical bit line structure and comprises first and second local bit lines transmitting first and second signals of first and second memory cells corresponding to a selected word line, and first and second global bit lines electrically connected to the first and second local bit lines through first and second switches, first and second sense amplifiers connected to the first and second global bit lines, and a control circuit. During a first period after the first and second memory cells are simultaneously accessed, the control circuit controls the first switch to conduction state so that the first sense amplifier amplifies the first signal and controls the second switch to non conduction state. During a second period after sensing of the first sense amplifier finishes, the control circuit controls the second switch to conduction state so that the second sense amplifier amplifies the second signal.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: August 27, 2013
    Assignee: Elpida Memory, Inc.
    Inventor: Kazuhiko Kajigaya
  • Patent number: 8519514
    Abstract: A semiconductor device includes a substrate, at least one via hole provided on the substrate, a through silicon via provided in the at least one via hole, and an interface chip that is electrically connected to the core chips through the through silicon via. The via hole includes a bowing shaped portion in which a diameter of a center portion is larger than diameters of both edges.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: August 27, 2013
    Assignee: Elpida Memory, Inc.
    Inventor: Seiya Fujii
  • Publication number: 20130215691
    Abstract: A system, includes a controller comprising a plurality of first external terminals configured to supply a command and an address, and communicate a data, and communicate a strobe signal related to the data; and a semiconductor memory device including a plurality of second external terminals corresponding to the plurality of first external terminals, at least one of the plurality of first external terminals and at least one of the plurality of second external terminals each being capable of supplying an information specifying a length of a preamble of the strobe signal before the semiconductor memory device communicates the data between the controller and the semiconductor memory device, the semiconductor memory device further including a preamble register configured to be capable of storing the information.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 22, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130214420
    Abstract: Provided is a semiconductor device including first and second semiconductor pillars formed on a surface of a semiconductor substrate and aligning in a first direction; a first interconnect extending in a second direction intersecting with the first direction and provided between the first and second semiconductor pillars; and a first contact pad located over the first interconnect, the first contact pad being in contact with and electrically connected to the first semiconductor pillar at a side surface thereof, while being electrically isolated from the second semiconductor pillar.
    Type: Application
    Filed: February 14, 2013
    Publication date: August 22, 2013
    Applicant: ELPIDA MEMORY, INC.
    Inventor: ELPIDA MEMORY, INC.
  • Publication number: 20130214427
    Abstract: A first semiconductor chip includes a first surface and a second surface opposite to the first surface. A second semiconductor chip is stacked over the second surface of the first semiconductor chip. The second semiconductor chip is larger in size than the first semiconductor chip. A first sealing resin covers the first and second semiconductor chips so that the first surface exposes from the first sealing resin. A first width of the first sealing resin that is around the first semiconductor chip is larger than a second width of the first sealing resin that is around the second semiconductor chip.
    Type: Application
    Filed: February 11, 2013
    Publication date: August 22, 2013
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130215676
    Abstract: A supply voltage generating circuit includes a first charge pump circuit that generates a first internal supply voltage, and second charge pump circuit that generates a second internal supply voltage. The absolute value of the second internal supply voltage is greater than that of the first internal supply voltage. The output terminal of the first charge pump circuit is connected to a secondary-side charging terminal of the second charge pump circuit. The secondary-side is an output-side of the corresponding charge pump circuit, and the charging terminal is an auxiliary charging terminal that supplies an auxiliary charge to a secondary-side output terminal of the corresponding charge pump circuit. The output terminal of the second charge pump circuit outputs a voltage value that is the result of adding a prescribed voltage value to the value of the first internal supply voltage applied to the charging terminal.
    Type: Application
    Filed: March 18, 2013
    Publication date: August 22, 2013
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130215659
    Abstract: A device includes a printed circuit board, a clock connector provided on the printed circuit board and configured to be supplied with a first clock signal, a first register buffer provided on the printed circuit board, coupled to the clock connector and, including a first clock generator that produces a second clock signal in response to the first clock signal, a plurality of data connectors, provided on the printed circuit board, a plurality of memory chips each provided on the printed circuit board and including a first data terminal, and a plurality of second register buffers each provided on the printed circuit board independently of the first register buffer.
    Type: Application
    Filed: March 18, 2013
    Publication date: August 22, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Elpida Memory, Inc.
  • Publication number: 20130217202
    Abstract: A method for fabricating a DRAM capacitor stack is described wherein the dielectric material is a multi-layer stack formed from a highly-doped material combined with a lightly or non-doped material. The highly-doped material remains amorphous with a crystalline content of less than 30% after an annealing step. The lightly or non-doped material becomes crystalline with a crystalline content of equal to or greater than 30% after an annealing step. The dielectric multi-layer stack maintains a high k-value while minimizing the leakage current and the EOT value.
    Type: Application
    Filed: March 14, 2013
    Publication date: August 22, 2013
    Applicants: ELPIDA MEMORY, INC, INTERMOLECULAR, INC.
    Inventors: Intermolecular, Inc., Elpida Memory, Inc.