Patents Assigned to TOSHIBA MEMORY CORPORATION
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Patent number: 10978469Abstract: A semiconductor storage device includes a semiconductor substrate; an insulating layer provided on the semiconductor substrate; a barrier metal layer provided on the insulating layer; an aluminum compound layer provided on the barrier metal layer; an amorphous layer provided on the aluminum compound layer and including a material that vaporizes upon its chemical reaction with fluorine; and a metal layer provided on the amorphous layer.Type: GrantFiled: February 27, 2019Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Kensei Takahashi, Takashi Asano, Satoshi Wakatsuki
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Patent number: 10978636Abstract: According to one embodiment, a storage device includes a magnetoresistive effect element comprising a nonmagnetic layer and a stacked body on the nonmagnetic layer. The stacked body includes a first ferromagnetic layer on the nonmagnetic layer, a second ferromagnetic layer exchange-coupled with the first ferromagnetic layer, and a magnetic layer between the first ferromagnetic layer and the second ferromagnetic layer. The magnetic layer includes a magnetic material and at least one compound selected from among a carbide, a nitride, and a boride.Type: GrantFiled: March 1, 2019Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Takeshi Iwasaki, Akiyuki Murayama, Tadashi Kai, Tadaomi Daibou, Masaki Endo, Shumpei Omine, Taichi Igarashi, Junichi Ito
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Patent number: 10976930Abstract: According to one embodiment, a memory device includes a nonvolatile semiconductor memory having physical storage areas that includes a user area externally accessible and are divided into management units and a control unit. The control unit receives a control command having a first argument to designate a sequential write area and a read command or a write command, assigns a management unit represented by an address of the read command or the write command as the sequential write area, and changes memory access control by judging whether an address of a memory access command to access the user area indicates access in the sequential write area whose size is equivalent to the management unit.Type: GrantFiled: June 3, 2019Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Akihisa Fujimoto
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Patent number: 10978316Abstract: A semiconductor processing device according to an embodiment includes a processing tank configured to store a chemical therein to allow a semiconductor substrate to be immersed in the chemical. A gas supply part is provided below the semiconductor substrate accommodated in the processing tank and is configured to supply air bubbles to the chemical from below the semiconductor substrate. A chemical supply part is provided above the gas supply part and below the semiconductor substrate and is configured to discharge the chemical caused to circulate from the processing tank, towards the air bubbles appearing from the gas supply part.Type: GrantFiled: July 26, 2018Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Satoshi Nakaoka, Tomohiko Sugita, Shinsuke Kimura, Hiroaki Ashidate, Katsuhiro Sato
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Patent number: 10978164Abstract: A memory device includes a semiconductor column extending above a substrate, a first conductive layer on a first side of the semiconductor column, a second conductive layer on a second side of the semiconductor column, opposite to the first conductive layer, a third conductive layer above or below the first conductive layer and on the first side of the semiconductor column, a fourth conductive layer on the second side of the semiconductor column, opposite to the third conductive layer, and a bit line connected to the semiconductor column. During reading in which a positive voltage is applied to the bit line, first, second, third, and fourth voltages applied to the first, second, third, and fourth conductive layers, respectively, wherein the first voltage and the third voltage are higher than each of the second voltage and the fourth voltage, and the third voltage is higher than the first voltage.Type: GrantFiled: January 8, 2020Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Takuya Futatsuyama, Kenichi Abe
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Patent number: 10978468Abstract: A semiconductor memory includes first to fourth regions that are arranged in a first direction, and first to third stacked bodies. An active region and a dummy region are provided in the first to third regions. The first stacked body includes an alternating stack of first insulators and first conductors in the active region. The second stacked body includes an alternating stack of second insulators and second conductors in the dummy region. The third stacked body includes an alternating stack of third insulators and third conductors. One of the third conductors closest to a substrate is electrically insulated from one of the first conductors closest to the substrate and electrically connected to one of the second conductors closest to the substrate.Type: GrantFiled: February 27, 2019Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Go Oike
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Patent number: 10978165Abstract: According to one embodiment, a memory system includes a non-volatile semiconductor memory that includes a memory cell and a controller having a memory storing a write parameter used in a write operation to the memory cell. The controller instructs the non-volatile semiconductor memory to perform the write operation to the memory cell using the write parameter, receives, from the non-volatile semiconductor memory, a result of checking of the write parameter which is obtained in the write operation and updates the write parameter stored in the memory on the basis of the result of checking of the write parameter.Type: GrantFiled: June 10, 2019Date of Patent: April 13, 2021Assignee: Toshiba Memory CorporationInventors: Suguru Nishikawa, Yoshihisa Kojima, Masanobu Shirakawa
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Patent number: 10978157Abstract: A memory system includes a semiconductor memory device having memory cells arranged in rows and columns, and a controller configured to issue a write command with or without a partial page program command to the semiconductor memory device. The semiconductor memory device, in response to the write command issued without the partial page command, executes a first program operation on a page of memory cells and then a first verify operation on the memory cells of the page using a first verify voltage for all of the memory cells of the page, and in response to the write command issued with the partial page command, executes a second program operation on a subset of the memory cells of the page and then a second verify operation on the memory cells of the subset using one of several different second verify voltages corresponding to the subset.Type: GrantFiled: February 14, 2020Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Masanobu Shirakawa, Kenta Yasufuku, Akira Yamaga
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Patent number: 10976656Abstract: A defect inspection device includes an image sensor configured to obtain an image of a target region of an object and divide the image of the target region into an array of pixels, and a processor. The processor is configured to receive a signal indicating a value of a property of the divided image, select a first pixel in the divided image, determine the value of the property of the first pixel, determine a reference pixel value for the first pixel, compare the reference pixel value to the value of the first pixel to obtain a difference value, and set a threshold difference at which a defect is assessed to be present, based at least in part on the value of the property of second pixels in the divided image adjacent to the first pixel.Type: GrantFiled: August 31, 2018Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Ryoji Yoshikawa
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Patent number: 10978471Abstract: A semiconductor memory device includes first structure bodies and second structure bodies arranged alternately along a first direction. The first structure body includes electrode films arranged along a second direction. The second structure body includes columnar members, first insulating members, and second insulating members. The columnar member includes a semiconductor member extending in the second direction and a charge storage member provided between the semiconductor member and the electrode film. The second insulating members are arranged along a third direction. Lengths in the first direction of the second insulating members are longer than lengths in the first direction of the first insulating members. Positions of the second insulating members in the third direction are different from each other between the second structure bodies adjacent to each other in the first direction. The columnar members and the first insulating members are arranged alternately between the second insulating members.Type: GrantFiled: March 12, 2019Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Keisuke Nakatsuka
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Publication number: 20210104282Abstract: According to an embodiment, a semiconductor memory, on receiving a first command, applies a voltage within a first range and a voltage within a second range to a word line and reads a first bit from a memory cell, and, on receiving a second command, applies a voltage within a third range to the word line and reads a second bit from the memory cell. The controller issues the first command a plurality of times and changes the voltages to be applied to the word line within the first range and the second range in accordance with the plurality of first commands, specifies a first and second voltage within the first and the second range, respectively, and estimates a third voltage within the third range. The voltage applied to read the second bit is the estimated third voltage.Type: ApplicationFiled: December 18, 2020Publication date: April 8, 2021Applicant: Toshiba Memory CorporationInventors: Tsukasa TOKUTOMI, Masanobu SHIRAKAWA, Marie TAKADA
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Publication number: 20210104274Abstract: A memory cell array is configured to have a plurality of memory cells arranged in a matrix, each of the memory cells being connected to a word line and a bit line and being capable of storing n values (n is a natural number equal to or larger than 3). A control circuit controls the potentials of the word line and bit line according to input data and writes data into a memory cell. The control circuit writes data into the memory cell to a k-valued threshold voltage (k<=n) in a write operation, precharges the bit line once, and then changes the potential of the word line an i number of times to verify whether the memory cell has reached an i-valued (i<=k) threshold voltage.Type: ApplicationFiled: November 23, 2020Publication date: April 8, 2021Applicant: TOSHIBA MEMORY CORPORATIONInventors: Noboru SHIBATA, Tomoharu TANAKA
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Publication number: 20210103390Abstract: A memory system includes a volatile first storing unit, a nonvolatile second storing unit in which data is managed in a predetermined unit, and a controller that writes data requested by a host apparatus in the second storing unit via the first storing unit and reads out data requested by the host apparatus from the second storing unit to the first storing unit and transfers the data to the host apparatus. The controller includes a management table for managing the number of failure areas in a predetermined unit that occur in the second storing unit and switches, according to the number of failure areas, an operation mode in writing data in the second storing unit from the host apparatus.Type: ApplicationFiled: December 17, 2020Publication date: April 8, 2021Applicant: Toshiba Memory CorporationInventors: Junji YANO, Hidenori MATSUZAKI, Kosuke HATSUDA
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Patent number: 10971511Abstract: A semiconductor memory includes a memory cell region that includes multiple memory cells stacked above a semiconductor substrate, first and second dummy regions on opposite sides of the memory cell region, each dummy region including multiple dummy cells stacked above the semiconductor substrate, and a wiring that electrically connects dummy cells of the first and second dummy regions that are at a same level above the semiconductor substrate.Type: GrantFiled: March 11, 2020Date of Patent: April 6, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
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Patent number: 10971592Abstract: A semiconductor device includes a gate insulating film on a semiconductor substrate, and a gate electrode on the gate insulating film. The gate electrode includes a first layer containing polycrystalline silicon, a second layer between the first layer and the gate insulating film and containing polycrystalline silicon and carbon, a third layer on an upper surface of the first layer and containing polycrystalline silicon and carbon, a fourth layer on a first side surface of the first layer and containing polycrystalline silicon and carbon, and a fifth layer on a second side surface of the first layer and containing polycrystalline silicon and carbon.Type: GrantFiled: February 19, 2019Date of Patent: April 6, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Kazuya Fukase
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Patent number: 10970166Abstract: A memory system of an embodiment includes a memory controller and a non-volatile memory. The memory controller executes error correction encoding on user data received from a host to generate first encoded data, adds the first encoded data to each of one or more pieces of second encoded data, obtained by performing error correction encoding on each of one or more pieces of predetermined data, to generate one or more pieces of third encoded data, obtained by executing error mitigation encoding on the first encoded data, and selects any one piece of encoded data from the first encoded data and the one or more pieces of third encoded data. The non-volatile memory stores the selected encoded data.Type: GrantFiled: July 26, 2019Date of Patent: April 6, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Toshiyuki Yamagishi
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Patent number: 10971473Abstract: According to one embodiment, a semiconductor device includes a substrate, first stacked components, second stacked components, and a coating resin. The first stacked components include first chips and are stacked on a surface of the substrate. The second stacked components include second chips and are stacked on the surface. The coating resin covers the surface, the first stacked components, and the second stacked components. A first top surface of a second farthest one of the first chips away from the surface differs in position in a first direction from a second top surface of second farthest one of the second chips away from the surface.Type: GrantFiled: February 26, 2019Date of Patent: April 6, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Yoshiyuki Kosaka
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Patent number: 10971515Abstract: A semiconductor memory device includes: a first conductive layer and a first insulating layer extending in a first direction, these layers being arranged in a second direction intersecting the first direction; a first semiconductor layer opposed to the first conductive layer, and extending in a third direction intersecting the first and second directions; a second semiconductor layer opposed to the first conductive layer, extending in the third direction; a first contact electrode connected to the first semiconductor layer; and a second contact electrode connected to the second semiconductor layer. In a first cross section extending in the first and second directions, an entire outer peripheral surface of the first semiconductor layer is surrounded by the first conductive layer, and an outer peripheral surface of the second semiconductor layer is surrounded by the first conductive layer and the first insulating layer.Type: GrantFiled: March 6, 2019Date of Patent: April 6, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventors: Shigeki Kobayashi, Masaru Kito, Yasuhiro Uchiyama
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Patent number: 10970000Abstract: A memory system includes a non-volatile memory having a memory cell array which stores data in a non-volatile manner, and a memory controller which transfers data received from a host to the non-volatile memory in parallel with execution of an operation of verifying validity of the data. A corresponding method is also described.Type: GrantFiled: February 7, 2019Date of Patent: April 6, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Takeshi Nakano
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Patent number: RE48514Abstract: According to one embodiment, a semiconductor device includes a device. The device includes a decoder, a generation circuit, a register, and a modifier. The decoder analyzes a command of a received packet. The generation circuit generates a unique device number in accordance with information in the packet. The register holds the generated unique device number. The modifier updates and outputs the packet. When a packet issued by a host is a command packet, among broadcast packets which return to the host through one or more devices, for determining the unique device number, the command packet includes parameters of an initial value and final value of device number.Type: GrantFiled: December 28, 2018Date of Patent: April 13, 2021Assignee: TOSHIBA MEMORY CORPORATIONInventor: Akihisa Fujimoto