JP6176882B2 - スピンホールmtjデバイスを有するクロスポイントアレイのmram - Google Patents
スピンホールmtjデバイスを有するクロスポイントアレイのmram Download PDFInfo
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- JP6176882B2 JP6176882B2 JP2016500053A JP2016500053A JP6176882B2 JP 6176882 B2 JP6176882 B2 JP 6176882B2 JP 2016500053 A JP2016500053 A JP 2016500053A JP 2016500053 A JP2016500053 A JP 2016500053A JP 6176882 B2 JP6176882 B2 JP 6176882B2
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/18—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using Hall-effect devices
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
- G11C11/15—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements using multiple magnetic layers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/161—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1659—Cell access
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1675—Writing or programming circuits or methods
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B61/00—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/10—Magnetoresistive devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/80—Constructional details
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- Computer Hardware Design (AREA)
- Hall/Mr Elements (AREA)
- Mram Or Spin Memory Techniques (AREA)
Description
Claims (10)
- 不揮発性メモリのためのビットセルであって、
前記ビットセルは、
固定磁性層の下に配置された誘電体層の下に配置された自由磁性層を有する磁性トンネル接合(MTJ)積層と、
前記MTJ積層の上に配置される電極と、
前記電極と結合されるワードラインと、
前記MTJ積層の前記自由磁性層の下に配置されるスピンホール金属電極と、
前記スピンホール金属電極の第1の端部と、導電的に結合される選択ラインと、
前記スピンホール金属電極の第2の端部と、導電的に結合されるビットラインと、
を備え、
前記MTJ積層は、前記第1の端部と前記第2の端部との間に配置され、
前記スピンホール金属電極の前記第1の端部と前記第2の端部とを結ぶ軸は、前記ビットラインの延在軸と平行に配置され、
前記選択ラインと前記ワードラインは、前記スピンホール金属電極と前記ビットラインとが対向する領域を通過するように配置される、ビットセル。 - 前記スピンホール金属電極は、β―タンタル(β―Ta)、β―タングステン(β―W)、およびプラチナ(Pt)からなる群から選択される金属を含む、請求項1に記載のビットセル。
- 前記スピンホール金属電極は、前記自由磁性層の両側に第2の異なる金属を含む、請求項2に記載のビットセル。
- 前記ビットセルは、
前記電極の下に配置された反強磁性(AFM)層と、
前記AFM層の下に配置された合成反強磁性体(SAF)積層とを更に備え、
前記MTJ積層は、前記SAF積層の下に配置される、請求項1から3のいずれか一項に記載のビットセル。 - 前記自由磁性層は、CoFeBを含み、
前記誘電体層は、酸化マグネシウム(MgO)を含み、
前記固定磁性層は、CoFeBを含み、
前記SAF積層は、CoFeの層の下に配置されたルテニウム(Ru)の層を備え、
前記AFM層は、IrMnを含み、
前記電極は、Ru/Ta/Ru積層を備える、請求項4に記載のビットセル。 - 複数のビットセルと、
複数の選択ラインと、
複数のビットラインと、
複数のワードラインと、
を備え、
各前記ビットセルは、
固定磁性層の下に配置された誘電体層の下に配置された自由磁性層を有する磁性トンネル接合(MTJ)積層と、前記MTJ積層の上に配置される電極と、前記MTJ積層の前記自由磁性層の下に配置されるスピンホール金属電極とを有し、
各前記ワードラインは、前記複数のビットセルのうち1または複数の各々の前記電極において、前記複数のビットセルのうち前記1または複数に結合され、
各前記選択ラインは、前記複数のビットセルのうち1または複数の各々の前記スピンホール金属電極の第1の端部において、前記複数のビットセルのうち1または複数と導電的に結合され、
各前記ビットラインは、前記複数のビットセルのうち1または複数の各々の前記スピンホール金属電極の第2の異なる端部において、前記複数のビットセルのうち前記1または複数と導電的に結合され、
前記MTJ積層は、前記第1の端部と前記第2の異なる端部との間に配置され、
前記スピンホール金属電極の前記第1の端部と前記第2の異なる端部とを結ぶ軸は、前記ビットラインの延在軸と平行に配置され、
前記選択ラインと前記ワードラインは、前記スピンホール金属電極と前記ビットラインとが互いに対向する領域を通過するように配置される、
クロスポイントアレイの巨大スピンホール効果磁気抵抗ランダムアクセスメモリ(GSHE―MRAM)。 - 各ビットセルの前記スピンホール金属電極は、β―タンタル(β―Ta)、β―タングステン(β―W)、およびプラチナ(Pt)からなる群から選択される金属を含む、請求項6に記載のクロスポイントアレイのGSHE―MRAM。
- 前記スピンホール金属電極は、前記自由磁性層の両側に第2の異なる金属を含む、請求項7に記載のクロスポイントアレイのGSHE―MRAM。
- 各前記ビットセルは、
前記電極の下に配置された反強磁性(AFM)層と、
前記AFM層の下に配置された合成反強磁性体(SAF)積層を更に有し、
前記MTJ積層は、前記SAF積層の下に配置される、請求項6から8のいずれか一項に記載のクロスポイントアレイのGSHE―MRAM。 - 前記自由磁性層は、CoFeBを含み、
前記誘電体層は、酸化マグネシウム(MgO)を含み、
前記固定磁性層は、CoFeBを含み、
前記SAF積層は、CoFeの層の下に配置されたルテニウム(Ru)の層を含み、
前記AFM層は、IrMnを含み、
前記電極は、Ru/Ta/Ru積層を含む、請求項9に記載のクロスポイントアレイのGSHE―MRAM。
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PCT/US2013/031699 WO2014142922A1 (en) | 2013-03-14 | 2013-03-14 | Cross point array mram having spin hall mtj devices |
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JP6176882B2 true JP6176882B2 (ja) | 2017-08-09 |
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US (1) | US9460768B2 (ja) |
JP (1) | JP6176882B2 (ja) |
KR (1) | KR102099192B1 (ja) |
CN (1) | CN104995682B (ja) |
DE (1) | DE112013006526T5 (ja) |
GB (1) | GB2526455B (ja) |
WO (1) | WO2014142922A1 (ja) |
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2013
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GB201513900D0 (en) | 2015-09-23 |
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GB2526455B (en) | 2020-04-01 |
KR102099192B1 (ko) | 2020-04-09 |
US20140269035A1 (en) | 2014-09-18 |
KR20150130980A (ko) | 2015-11-24 |
DE112013006526T5 (de) | 2015-10-29 |
JP2016517165A (ja) | 2016-06-09 |
CN104995682A (zh) | 2015-10-21 |
US9460768B2 (en) | 2016-10-04 |
CN104995682B (zh) | 2018-01-19 |
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