JP2012533195A - 非オーム選択層を有する不揮発性メモリセル - Google Patents
非オーム選択層を有する不揮発性メモリセル Download PDFInfo
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
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- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
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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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0009—RRAM elements whose operation depends upon chemical change
- G11C13/0011—RRAM elements whose operation depends upon chemical change comprising conductive bridging RAM [CBRAM] or programming metallization cells [PMCs]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0021—Auxiliary circuits
- G11C13/003—Cell access
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0021—Auxiliary circuits
- G11C13/0069—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
- H10B61/10—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having two electrodes, e.g. diodes or MIM elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/20—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having two electrodes, e.g. diodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
- H10N70/24—Multistable switching devices, e.g. memristors based on migration or redistribution of ionic species, e.g. anions, vacancies
- H10N70/245—Multistable switching devices, e.g. memristors based on migration or redistribution of ionic species, e.g. anions, vacancies the species being metal cations, e.g. programmable metallization cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/821—Device geometry
- H10N70/826—Device geometry adapted for essentially vertical current flow, e.g. sandwich or pillar type devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/821—Device geometry
- H10N70/828—Current flow limiting means within the switching material region, e.g. constrictions
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0021—Auxiliary circuits
- G11C13/0069—Writing or programming circuits or methods
- G11C2013/0073—Write using bi-directional cell biasing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/50—Resistive cell structure aspects
- G11C2213/51—Structure including a barrier layer preventing or limiting migration, diffusion of ions or charges or formation of electrolytes near an electrode
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/70—Resistive array aspects
- G11C2213/76—Array using an access device for each cell which being not a transistor and not a diode
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Semiconductor Memories (AREA)
- Hall/Mr Elements (AREA)
- Mram Or Spin Memory Techniques (AREA)
Abstract
Description
固体メモリ(SSM)は、個別にプログラム可能なメモリセルのアレイを1つ以上含み、セルに書込電流を与えることによってデータを記憶するように構成されて、一連のビットを記憶する。記憶されたビットは、後で読出動作の際に、適切な読出電流を与えてセルの電圧降下を検知することにより、読出すことができる。
したがって、本発明のさまざまな実施例は一般に不揮発性メモリセルに向けられており、非オーム選択層を含む関連する方法が開示されている。
本明細書は一般に不揮発性メモリセルに関し、特に抵抗検知素子へのアクセスを選択的に可能にする選択層を有するメモリセルに関する。先行技術のデータ記憶装置の多くは、さまざまな理由により、高密度メモリアレイに配置されているメモリセルにバイポーラ電流を確実に提供できないことがある。その理由の1つは、選択的にバイポーラ電流を与えることができる装置の広い物理的スペース要件にある。さらに、既存のメモリセルはメモリアレイを著しく複雑にし、信頼できる動作のためにはさらなる処理時間および電力を必要とする。
Claims (20)
- メモリセルであって、非オーム選択層に結合される抵抗検知素子(RSE)を備え、選択層は所定のしきい値以上の電流に応答して第1の抵抗状態から第2の抵抗状態に遷移するよう構成されている、メモリセル。
- 選択層は金属絶縁遷移材からなる、請求項1に記載のメモリセル。
- 金属絶縁遷移材はバイポーラとして特徴付けられる、請求項2に記載のメモリセル。
- 第1の抵抗状態は高抵抗および非導通状態に対応し、第2の抵抗状態は低抵抗および導通状態に対応する、請求項1に記載のメモリセル。
- 選択層は、メモリセルの電流量が所定のしきい値未満である場合、第1の抵抗状態に戻る、請求項1に記載のメモリセル。
- 選択層はカルコゲニドからなる、請求項1に記載のメモリセル。
- カルコゲニドはGe2Sb2Te5である、請求項6に記載のメモリセル。
- RSEはバイポーラ不揮発性メモリ素子である、請求項1に記載のメモリセル。
- 金属絶縁遷移材は、クロム、チタンおよびタングステンからなる群から選択された材料でドーピングされる、請求項2に記載のメモリセル。
- 金属絶縁遷移材はVO2、VO、VOXおよびTi2O3からなる群から選択される、請求項2に記載のメモリセル。
- データ記憶装置であって、
行および列に配置される、クロスポイントアレイのメモリセルを備え、各メモリセルは非オーム選択層に結合される抵抗検知素子(RSE)を含み、さらに
所定のしきい値以上の電流をメモリセルに与えることにより、選択層を第1の抵抗状態から第2の抵抗状態に遷移することができるデータアクセス回路を備える、データ記憶装置。 - 選択層は複数の金属絶縁遷移材からなる、請求項11に記載の装置。
- RSEは不揮発性抵抗ランダムアクセスメモリ(RRAM(登録商標))セルからなる、請求項11に記載の装置。
- RSEは不揮発性スピン注入型ランダムアクセスメモリ(STRAM)セルからなる、請求項11に記載の装置。
- 選択層はバリア層によってRSEから分離される、請求項11に記載の装置。
- 選択層、バリア層、およびRSEは第1の電極と第2の電極との間に配置される、請求項15に記載の装置。
- バリア層は対向する側面において選択層およびRSEにともに接し、バリア層はTa、TaN、Ti、TiN、TiW、チタン合金、およびタンタル合金からなる群から選択される材料を含む、請求項15に記載の装置。
- 方法であって、非オーム選択層に結合される抵抗検知素子(RSE)を含むメモリセルを設けること、さらに
所定のしきい値以上の電流をメモリセルに与えることにより、選択層を第1の抵抗状態から第2の抵抗状態に遷移させることを含む、方法。 - 選択層が第2の抵抗状態にある間、第1の論理状態が電流によってRSEにプログラムされる、請求項18に記載の方法。
- 選択層が第1の抵抗状態にある間、電流はメモリセルを通ることができない、請求項18に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/502,222 US7936585B2 (en) | 2009-07-13 | 2009-07-13 | Non-volatile memory cell with non-ohmic selection layer |
US12/502,222 | 2009-07-13 | ||
PCT/US2010/041555 WO2011008654A1 (en) | 2009-07-13 | 2010-07-09 | Non-volatile memory cell with non-ohmic selection layer |
Publications (2)
Publication Number | Publication Date |
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JP2012533195A true JP2012533195A (ja) | 2012-12-20 |
JP5819822B2 JP5819822B2 (ja) | 2015-11-24 |
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JP2012520687A Expired - Fee Related JP5819822B2 (ja) | 2009-07-13 | 2010-07-09 | 非オーム選択層を有する不揮発性メモリセル |
Country Status (5)
Country | Link |
---|---|
US (2) | US7936585B2 (ja) |
JP (1) | JP5819822B2 (ja) |
KR (1) | KR101357175B1 (ja) |
CN (1) | CN102598139B (ja) |
WO (1) | WO2011008654A1 (ja) |
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JP2014523637A (ja) * | 2011-05-31 | 2014-09-11 | クロスバー, インコーポレイテッド | 非線形素子を有するスイッチングデバイス |
US9564587B1 (en) | 2011-06-30 | 2017-02-07 | Crossbar, Inc. | Three-dimensional two-terminal memory with enhanced electric field and segmented interconnects |
US9570678B1 (en) | 2010-06-08 | 2017-02-14 | Crossbar, Inc. | Resistive RAM with preferental filament formation region and methods |
US9576616B2 (en) | 2012-10-10 | 2017-02-21 | Crossbar, Inc. | Non-volatile memory with overwrite capability and low write amplification |
US9583701B1 (en) | 2012-08-14 | 2017-02-28 | Crossbar, Inc. | Methods for fabricating resistive memory device switching material using ion implantation |
USRE46335E1 (en) | 2010-11-04 | 2017-03-07 | Crossbar, Inc. | Switching device having a non-linear element |
US9590013B2 (en) | 2010-08-23 | 2017-03-07 | Crossbar, Inc. | Device switching using layered device structure |
US9601692B1 (en) | 2010-07-13 | 2017-03-21 | Crossbar, Inc. | Hetero-switching layer in a RRAM device and method |
US9601690B1 (en) | 2011-06-30 | 2017-03-21 | Crossbar, Inc. | Sub-oxide interface layer for two-terminal memory |
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Also Published As
Publication number | Publication date |
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JP5819822B2 (ja) | 2015-11-24 |
KR101357175B1 (ko) | 2014-01-29 |
US20110188293A1 (en) | 2011-08-04 |
US20110007551A1 (en) | 2011-01-13 |
WO2011008654A1 (en) | 2011-01-20 |
CN102598139A (zh) | 2012-07-18 |
US8203865B2 (en) | 2012-06-19 |
CN102598139B (zh) | 2015-01-14 |
US7936585B2 (en) | 2011-05-03 |
KR20120026636A (ko) | 2012-03-19 |
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