公开(公告)号：US20190295619A1

公开(公告)日：2019-09-26

申请号：US16132991

申请日：2018-09-17

Applicant: Kabushiki Kaisha Toshiba

Inventor： Tomoaki INOKUCHI ,  Naoharu SHIMOMURA ,  Katsuhiko KOUI ,  Yuuzo KAMIGUCHI ,  Kazutaka IKEGAMI ,  Shinobu FUJITA ,  Hiroaki YODA

IPC: G11C11/16 ,  H01L43/06 ,  H01L43/08 ,  H01L43/10 ,  H01L27/22

Abstract: According to one embodiment, a magnetic device includes: a first conductive layer; a first magnetoresistive effect element disposed on the first S conductive layer and including a first control terminal;and a first circuit configured to supply a first current in a first direction into the first conductive layer and apply a first control voltage to the first control terminal of the first magnetoresistive effect element, wherein in a case in which the first current is supplied to the first conductive layer, the first magnetoresistive effect element holds a value corresponding to a logical disjunction between a first value of first data in the first magnetoresistive effect element and a second value of the first control voltage corresponding to second data.

公开(公告)号：US20180301179A1

公开(公告)日：2018-10-18

申请号：US16011070

申请日：2018-06-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tomoaki INOKUCHI ,  Naoharu SHIMOMURA ,  Katsuhiko KOUI ,  Yuuzo KAMIGUCHI ,  Satoshi SHIROTORI ,  Kazutaka IKEGAMI ,  Hiroaki YODA

IPC: G11C11/16

CPC classification number: G11C11/1675 ,  G11C11/161 ,  G11C11/1673

Abstract: According to one embodiment, a nonvolatile memory includes a conductive line including a first portion, a second portion and a third portion therebetween, a storage element including a first magnetic layer, a second magnetic layer and a nonmagnetic layer therebetween, and the first magnetic layer being connected to the third portion, and a circuit flowing a write current between the first and second portions, applying a first potential to the second magnetic layer, and blocking the write current flowing between the first and second portions after changing the second magnetic layer from the first potential to a second potential.

公开(公告)号：US20200279596A1

公开(公告)日：2020-09-03

申请号：US16741246

申请日：2020-01-13

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tomoaki INOKUCHI ,  Katsuhiko KOUI ,  Naoharu SHIMOMURA ,  Hideyuki SUGIYAMA ,  Kazutaka IKEGAMI ,  Susumu TAKEDA ,  Satoshi TAKAYA ,  Shinobu FUJITA ,  Hiroaki YODA

IPC: G11C11/16 ,  H01L27/22 ,  H01L43/02

Abstract: According to one embodiment, a magnetic memory device includes a conductive member, a first element portion, and a controller. The conductive member includes a first portion, a second portion, and a third portion between the first portion and the second portion. The first element portion includes a first element, a first interconnect, and a first circuit. The first element includes a first magnetic layer, a first counter magnetic layer, and a first nonmagnetic layer. The first counter magnetic layer is provided between the third portion and the first magnetic layer. The first nonmagnetic layer is provided between the first counter magnetic layer and the first magnetic layer. The first interconnect is electrically connected to the first magnetic layer. The first circuit is electrically connected to the first interconnect. The first circuit includes a first switch, a first capacitance element, a first parallel switch, and a first parallel capacitance element.

公开(公告)号：US20190088302A1

公开(公告)日：2019-03-21

申请号：US15915654

申请日：2018-03-08

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Naoharu SHIMOMURA ,  Tomoaki INOKUCHI ,  Katsuhiko KOUI ,  Yuzo KAMIGUCHI ,  Hiroaki YODA ,  Hideyuki SUGIYAMA

IPC: G11C11/16 ,  H01L43/08 ,  H01L43/06 ,  G11C11/18 ,  H01L27/22

CPC classification number: G11C11/1675 ,  G11C11/161 ,  G11C11/1673 ,  G11C11/18 ,  H01L27/228 ,  H01L43/06 ,  H01L43/08

Abstract: According to one embodiment, a magnetic memory includes: magnetoresistive effect elements arranged on an conductive layer; and a first circuit which passes a write current through the conductive layer and applies a control voltage to the magnetoresistive effect elements, to write data including a first value and a second value into the magnetoresistive effect elements. The first circuit adjusts at least one of a write sequence of the first value and the second value, a current value of the write current, and a pulse width of the write current, on the basis of an arrangement of the first value and the second value in the data.

公开(公告)号：US20170186450A1

公开(公告)日：2017-06-29

申请号：US15254236

申请日：2016-09-01

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kenichiro YAMADA ,  Shuichi MURAKAMI ,  Naoyuki NARITA ,  Katsuhiko KOUI ,  Akihiko TAKEO ,  Mariko SHIMIZU ,  Hitoshi IWASAKI

IPC: G11B5/127 ,  G11B5/17

CPC classification number: G11B5/1278 ,  G11B5/17 ,  G11B5/235 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3143 ,  G11B5/3146 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head includes a magnetic pole, a stacked body, and a first non-magnetic layer. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the magnetic pole, and a non-magnetic intermediate layer provided between the first magnetic layer and the second magnetic layer. The first non-magnetic layer is provided between the second magnetic layer and the magnetic pole, and contacts the magnetic pole and the second magnetic layer. The first magnetic layer has a first thickness and a first saturation magnetic flux density. The second magnetic layer has a second thickness and a second saturation magnetic flux density. A second product of the second thickness and the second saturation magnetic flux density is larger than a first product of the first thickness and the first saturation magnetic flux density.

公开(公告)号：US20150146323A1

公开(公告)日：2015-05-28

申请号：US14610576

申请日：2015-01-30

Applicant: Kabushiki Kaisha Toshiba

Inventor： Kenichiro YAMADA ,  Katsuhiko KOUI

IPC: G11B5/35

CPC classification number: G11B5/35 ,  G11B5/1278 ,  G11B5/315 ,  G11B2005/0005 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a trailing shield opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between the main pole and the trailing shield in a range of a width of the main pole in a track width direction, and configured to generate a high-frequency magnetic field. The high-frequency oscillator includes a spin injection layer, an intermediate layer, and an oscillation layer, and at least the oscillation layer comprises divided oscillation regions.

公开(公告)号：US20190287589A1

公开(公告)日：2019-09-19

申请号：US16119003

申请日：2018-08-31

Applicant: Kabushiki Kaisha Toshiba

Inventor： Altansargai BUYANDALAI ,  Satoshi SHIROTORI ,  Yuichi OHSAWA ,  Hideyuki SUGIYAMA ,  Mariko SHIMIZU ,  Hiroaki YODA ,  Katsuhiko KOUI

IPC: G11C11/16 ,  H01L43/02 ,  H01L27/22

Abstract: According to one embodiment, a magnetic memory device includes a conductive layer, a first magnetic layer, a second magnetic layer, and a first nonmagnetic layer. The conductive layer includes first and second regions, and a third region between the first region and the second region. The second magnetic layer is provided between the third region and the first magnetic layer in a first direction crossing a second direction. The second direction is from the first region toward the second region. The first nonmagnetic layer is provided between the first and second magnetic layers. The second region includes first to third conductive portions. A direction from the first conductive portion toward the second conductive portion is aligned with a third direction. The third direction crosses a plane including the first and second directions. The third conductive portion is between the first and second conductive portions in the third direction.

公开(公告)号：US20170236537A1

公开(公告)日：2017-08-17

申请号：US15262081

申请日：2016-09-12

Applicant: Kabushiki Kaisha Toshiba

Inventor： Shuichi MURAKAMI ,  Kenichiro YAMADA ,  Katsuhiko KOUI ,  Mariko SHIMIZU ,  Akihiko TAKEO ,  Naoyuki NARITA ,  Hitoshi IWASAKI

IPC: G11B5/31 ,  G11B5/127

CPC classification number: G11B5/315 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head includes a magnetic pole, a stacked body, and a first nonmagnetic layer. The stacked body includes first magnetic layer, a second magnetic layer provided between the first magnetic layer and the magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer and being nonmagnetic. The first nonmagnetic layer is provided between the second magnetic layer and the magnetic pole. A product of a thickness and a saturation magnetic flux density of the second magnetic layer is larger than a product of a thickness and a saturation magnetic flux density of the first magnetic layer. The length of the first magnetic layer is shorter than a length of the second magnetic layer. A current flows from the second magnetic layer toward the first magnetic layer.

公开(公告)号：US20150146324A1

公开(公告)日：2015-05-28

申请号：US14610759

申请日：2015-01-30

Applicant: Kabushiki Kaisha Toshiba

Inventor： Kenichiro YAMADA ,  Katsuhiko KOUI

IPC: G11B5/35

CPC classification number: G11B5/35 ,  G11B5/1278 ,  G11B5/315 ,  G11B2005/0005 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a trailing shield opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between the main pole and the trailing shield in a range of a width of the main pole in a track width direction, and configured to generate a high-frequency magnetic field. The high-frequency oscillator includes a spin injection layer, an intermediate layer, and an oscillation layer, and at least the oscillation layer comprises divided oscillation regions.

公开(公告)号：US20140376130A1

公开(公告)日：2014-12-25

申请号：US14152974

申请日：2014-01-10

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Akihiko TAKEO ,  Kazuto KASHIWAGI ,  Kenichiro YAMADA ,  Katsuhiko KOUI ,  Tomomi FUNAYAMA

IPC: G11B5/31

CPC classification number: G11B5/3163 ,  G11B5/29 ,  G11B5/3909 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/3958 ,  G11B5/4886 ,  G11B5/4976

Abstract: A magnetic head includes a plurality of reproducing elements so that the magnetic head can acquire reproduction signals from a plurality of tracks at the same time. The magnetic head includes a first reproducing element, a first magnetic film formed on a first side wall of the first reproducing element with a first side wall insulating film interposed therebetween, a second magnetic film formed on a second side wall of the first reproducing element with a second side wall insulating film interposed therebetween, a second reproducing element electrically isolated from the first reproducing element and formed on the first magnetic film, a third magnetic film formed on the first magnetic film, and a fourth magnetic film formed on the first reproducing element and electrically isolated from the second reproducing element.

Abstract translation: 磁头包括多个再现元件，使得磁头可以同时从多个轨迹获取再现信号。 磁头包括第一再现元件，形成在第一再现元件的第一侧壁上的第一磁性膜，其间插入有第一侧壁绝缘膜，形成在第一再现元件的第二侧壁上的第二磁性膜， 介于其间的第二侧壁绝缘膜，与第一再现元件电隔离并形成在第一磁性膜上的第二再现元件，形成在第一磁性膜上的第三磁性膜和形成在第一再现元件上的第四磁性膜 并且与第二再现元件电隔离。