JP5613868B2 - マルチビット記憶装置用相変化メモリデバイス - Google Patents
マルチビット記憶装置用相変化メモリデバイス Download PDFInfo
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- JP5613868B2 JP5613868B2 JP2008261125A JP2008261125A JP5613868B2 JP 5613868 B2 JP5613868 B2 JP 5613868B2 JP 2008261125 A JP2008261125 A JP 2008261125A JP 2008261125 A JP2008261125 A JP 2008261125A JP 5613868 B2 JP5613868 B2 JP 5613868B2
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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
- H10N70/00—Solid-state devices without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
- H10N70/231—Multistable switching devices, e.g. memristors based on solid-state phase change, e.g. between amorphous and crystalline phases, Ovshinsky effect
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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
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
-
- 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
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5678—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using amorphous/crystalline phase transition storage elements
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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
- G11C13/0004—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 comprising amorphous/crystalline phase transition cells
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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
- H10N70/00—Solid-state devices without a potential-jump barrier or surface barrier, 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
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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
- H10N70/00—Solid-state devices without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/841—Electrodes
- H10N70/8413—Electrodes adapted for resistive heating
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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
- H10N70/00—Solid-state devices without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8825—Selenides, e.g. GeSe
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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
- H10N70/00—Solid-state devices without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8828—Tellurides, e.g. GeSbTe
Description
4 多結晶部
5 非晶質部
6 誘電体層
10 PCM素子
11 薄い導電性領域
Claims (16)
- ヒータ素子(2)及びカルコゲニック材料のメモリ領域(3)を含み、前記メモリ領域が、前記ヒータ素子と電気的及び熱的に接触した相変化部分(5)を有し、且つ前記ヒータ素子と前記メモリ領域の残りの部分(4)との間に第1の電流路を形成し、前記相変化部分が複数の大きさ及び前記残りの部分とは異なる抵抗率とを有することができ、前記複数の大きさが前記メモリ領域内に記憶された情報に相関性がある、相変化メモリデバイスであって、
前記ヒータ素子(2)と前記メモリ領域(3)の残りの部分(4)との間に抵抗性領域(11)があり、前記抵抗性領域(11)が、前記メモリ領域と接触している前記ヒータ素子(2)の突出部分であり、前記突出部分の前記材料が、前記ヒータ素子の材料と同じであり、前記突出部分が前記ヒータ素子から水平方向に突出していることを特徴とする相変化メモリデバイス。 - 前記抵抗性領域(11)が、前記大きさに依存し、且つ前記相変化部分(5)よりも小さい抵抗を有する、
請求項1記載の相変化メモリデバイス。 - 前記抵抗性領域が、前記ヒータ(2)素子の上縁から絶縁領域(6、46、48、61)と前記メモリ領域(3)との間に延びる抵抗性領域(11)である、
請求項1又は2に記載の相変化メモリデバイス。 - 前記抵抗性領域(11)が、金属と多結晶シリコンとの間で選択された材料からなる、
請求項3記載の相変化メモリデバイス。 - 前記抵抗性領域(11)が、TiN、TiAlN、TiSiNから選択された材料からなる、請求項3または4に記載の相変化メモリデバイス。
- 前記ヒータ素子(2)が、前記絶縁層(46、48)により囲まれた槍型素子であり、
前記デバイスが、前記抵抗性領域(11)及び前記メモリ領域(3)を含む平面メモリスタックを備える、
請求項3から5のいずれかに記載の相変化メモリデバイス。 - 前記絶縁領域が、前記ヒータ素子(2)を囲む誘電体層(46)と、前記誘電体層の上に延びるモールド層(61)とを含み、前記モールド層が、前記ヒータ素子(2)に向かってより浅い基部を備えたテーパ状マイクロトレンチ(62)を有し、前記メモリスタック(49)が、前記テーパ状マイクロトレンチ内に少なくとも部分的に延びており、前記抵抗性領域(11)及び前記メモリ領域(3)を含む、
請求項3から5のいずれかに記載の相変化メモリデバイス。 - プロセッサ(510)と、
前記プロセッサに結合されたスタティックランダムアクセスメモリ(560)と、
前記プロセッサに結合され、請求項1から7のいずれかによる前記相変化メモリデバイス(10)を備えたメモリ(530)と、
を含むシステム。 - ヒータ素子(2)を形成する段階と、
前記ヒータ素子と電気的及び熱的に接触したカルコゲニック材料のメモリ領域(3)を形成する段階と、
を含み、
前記メモリ領域が、前記ヒータ素子に向かう相変化部(5)を有し、且つ前記ヒータ素子と前記メモリ領域の残りの部分(4)との間に第1の電流路を形成し、前記相変化部が複数の大きさ及び前記残りの部分とは異なる抵抗率とを有することができ、前記複数の大きさが前記メモリ領域内に記憶される情報に相関性がある、相変化メモリデバイスを製造するための方法であって、
前記ヒータ素子(2)と前記メモリ領域(3)の残りの部分(4)との間に抵抗性領域(11)を形成する段階によって特徴付けられ、前記抵抗性領域(11)が、前記メモリ領域と接触している前記ヒータ素子(2)の突出部分であり、前記突出部分の前記材料が、前記ヒータ素子の材料と同じであり、前記突出部分が前記ヒータ素子から水平方向に突出している方法。 - 抵抗性領域を形成する段階が、前記メモリ領域を形成する段階の前に、前記ヒータ素子(2)を囲み且つ前記ヒータ素子の上縁から延びる絶縁領域(6、46、48)上に抵抗性領域を形成する段階を含む、
請求項9に記載の方法。 - 前記相変化部(5)が、前記残りの部分(4)よりも高い抵抗率を有し、前記抵抗性領域(11)が、前記相変化部(5)よりも小さい抵抗率を有する、
請求項10に記載の方法。 - 前記抵抗性領域(11)が、金属と多結晶シリコンの間で選択された材料からなる、請求項10又は11に記載の方法。
- 前記抵抗性領域(11)が、TiN、TiAlN、TiSiNから選択された材料からなる、請求項9から12のいずれかに記載の方法。
- 前記抵抗性領域(11)が、10nmより薄く、好ましくは1nmと10nmとの間を含み、最も好ましくは4から5nmである厚みを有する、
請求項10から13のいずれかに記載の方法。 - 前記ヒータ素子(2)を形成する段階が、
前記絶縁層(6、46、48)を形成する段階と、
前記絶縁層内に開孔を形成する段階と、
前記開孔中にヒータ層(2)を堆積する段階と、
前記開孔の外側の過剰なヒータ層を除去して平坦化された表面を有するようにする段階と、
抵抗性層(11)及びカルコゲニック層(3)を含む層スタック(49)を堆積する段階と、
同じパターン形成段階において前記層スタックをパターン形成して、前記メモリ領域(3)及び前記抵抗性領域(11)を含むメモリスタック(49)を形成する段階と、
を含む請求項10から14のいずれかに記載の方法。 - 前記ヒータ素子(2)を形成する段階が、
前記絶縁層(46)を形成する段階と、
前記絶縁層内に開孔を形成する段階と、
前記開孔中にヒータ層(2)を堆積する段階と、
前記開孔の外側の過剰なヒータ層を除去して平坦化された表面を有するようにする段階と、
前記平坦化された表面上にモールド層を堆積する段階と、
前記モールド層中に、前記ヒータ素子と接触したより浅い基部を有するテーパ状アパーチャを形成する段階と、
抵抗性層(11)及びカルコゲニック層(3)を含む層スタック(49)を堆積する段階と、
同じパターン形成段階において前記層スタック(49)をパターン形成して、前記メモリ領域(3)と、前記テーパ状アパーチャ内の少なくとも一部を有する抵抗性領域(11)とを含むメモリスタックを形成する段階と、
を含む請求項10から15のいずれかに記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07425555A EP2034536B1 (en) | 2007-09-07 | 2007-09-07 | Phase change memory device for multibit storage |
EP07425555.5 | 2007-09-07 |
Publications (2)
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JP2009071314A JP2009071314A (ja) | 2009-04-02 |
JP5613868B2 true JP5613868B2 (ja) | 2014-10-29 |
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JP2008261125A Active JP5613868B2 (ja) | 2007-09-07 | 2008-09-08 | マルチビット記憶装置用相変化メモリデバイス |
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EP (1) | EP2034536B1 (ja) |
JP (1) | JP5613868B2 (ja) |
KR (1) | KR101534500B1 (ja) |
CN (1) | CN101442103B (ja) |
DE (2) | DE602007010624D1 (ja) |
TW (1) | TWI419322B (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI511964B (zh) | 2007-08-08 | 2015-12-11 | Universal Display Corp | 苯并稠合噻吩/聯伸三苯混合材料 |
US8830722B2 (en) | 2011-08-25 | 2014-09-09 | Micron Technology, Inc. | Methods, apparatuses, and circuits for programming a memory device |
US8988926B2 (en) | 2013-01-11 | 2015-03-24 | Micron Technology, Inc. | Method, system and device for phase change memory with shunt |
GB2515100A (en) | 2013-06-14 | 2014-12-17 | Ibm | Phase-change memory cells |
GB2515101A (en) | 2013-06-14 | 2014-12-17 | Ibm | Phase-change memory cells |
GB2515567A (en) * | 2013-06-28 | 2014-12-31 | Ibm | Phase-Change memory cells |
KR20150043759A (ko) * | 2013-10-15 | 2015-04-23 | 에스케이하이닉스 주식회사 | 저항 변화 메모리 장치 및 그의 제조방법 |
US9853229B2 (en) | 2013-10-23 | 2017-12-26 | University Of Southern California | Organic electroluminescent materials and devices |
IT201900021606A1 (it) | 2019-11-19 | 2021-05-19 | St Microelectronics Srl | Dispositivo di memoria a cambiamento di fase e metodo di programmazione di un dispositivo di memoria a cambiamento di fase |
US11283015B2 (en) | 2020-03-24 | 2022-03-22 | International Business Machines Corporation | Projected phase change memory devices |
US11805711B2 (en) * | 2020-09-28 | 2023-10-31 | International Business Machines Corporation | Phase-change memory (PCM) including liner reducing resistance drift |
US11653578B2 (en) | 2020-12-01 | 2023-05-16 | International Business Machines Corporation | Phase-change material-based XOR logic gates |
US11456415B2 (en) | 2020-12-08 | 2022-09-27 | International Business Machines Corporation | Phase change memory cell with a wrap around and ring type of electrode contact and a projection liner |
US11476418B2 (en) * | 2020-12-08 | 2022-10-18 | International Business Machines Corporation | Phase change memory cell with a projection liner |
US20230085288A1 (en) * | 2021-09-13 | 2023-03-16 | International Business Machines Corporation | Electrically insulated projection liner for ai device |
US20230093604A1 (en) * | 2021-09-21 | 2023-03-23 | International Business Machines Corporation | Phase-change memory with embedded air gap |
US20230098562A1 (en) * | 2021-09-29 | 2023-03-30 | International Business Machines Corporation | Phase change memory cell sidewall projection liner |
US20230105007A1 (en) * | 2021-10-04 | 2023-04-06 | International Business Machines Corporation | Artificial intelligence (ai) devices with improved thermal stability and scaling behavior |
IT202200001130A1 (it) | 2022-01-24 | 2023-07-24 | St Microelectronics Srl | Cella di memoria a cambiamento di fase con struttura asimmetrica, dispositivo di memoria includente la cella di memoria a cambiamento di fase, e metodo per fabbricare la cella di memoria a cambiamento di fase |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5166758A (en) * | 1991-01-18 | 1992-11-24 | Energy Conversion Devices, Inc. | Electrically erasable phase change memory |
US5406509A (en) * | 1991-01-18 | 1995-04-11 | Energy Conversion Devices, Inc. | Electrically erasable, directly overwritable, multibit single cell memory elements and arrays fabricated therefrom |
US6507061B1 (en) * | 2001-08-31 | 2003-01-14 | Intel Corporation | Multiple layer phase-change memory |
US6764894B2 (en) * | 2001-08-31 | 2004-07-20 | Ovonyx, Inc. | Elevated pore phase-change memory |
KR100504698B1 (ko) * | 2003-04-02 | 2005-08-02 | 삼성전자주식회사 | 상변화 기억 소자 및 그 형성 방법 |
EP1557875A1 (en) | 2003-12-29 | 2005-07-27 | STMicroelectronics S.r.l. | Process for forming tapered trenches in a dielectric material |
KR100568511B1 (ko) * | 2003-12-30 | 2006-04-07 | 삼성전자주식회사 | 상전이막 패턴을 갖는 반도체 장치들 및 그 제조방법들 |
EP1675183A1 (en) | 2004-12-21 | 2006-06-28 | STMicroelectronics S.r.l. | Phase change memory cell with diode junction selection and manufacturing method thereof |
US7488968B2 (en) * | 2005-05-05 | 2009-02-10 | Ovonyx, Inc. | Multilevel phase change memory |
KR100794654B1 (ko) * | 2005-07-06 | 2008-01-14 | 삼성전자주식회사 | 상 변화 메모리 장치 및 그것의 프로그램 방법 |
TWI290369B (en) * | 2005-07-08 | 2007-11-21 | Ind Tech Res Inst | Phase change memory with adjustable resistance ratio and fabricating method thereof |
EP1764847B1 (en) * | 2005-09-14 | 2008-12-24 | STMicroelectronics S.r.l. | Ring heater for a phase change memory device |
JP2007165710A (ja) * | 2005-12-15 | 2007-06-28 | Elpida Memory Inc | 不揮発性メモリ素子の製造方法 |
JP4691454B2 (ja) * | 2006-02-25 | 2011-06-01 | エルピーダメモリ株式会社 | 相変化メモリ装置およびその製造方法 |
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2007
- 2007-09-07 EP EP07425555A patent/EP2034536B1/en active Active
- 2007-09-07 DE DE602007010624T patent/DE602007010624D1/de active Active
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2008
- 2008-09-04 DE DE102008041810A patent/DE102008041810A1/de not_active Withdrawn
- 2008-09-05 TW TW097134288A patent/TWI419322B/zh active
- 2008-09-08 CN CN200810212331.6A patent/CN101442103B/zh active Active
- 2008-09-08 KR KR1020080088382A patent/KR101534500B1/ko active IP Right Grant
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Also Published As
Publication number | Publication date |
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CN101442103A (zh) | 2009-05-27 |
KR20090027152A (ko) | 2009-03-16 |
TW200939467A (en) | 2009-09-16 |
TWI419322B (zh) | 2013-12-11 |
KR101534500B1 (ko) | 2015-07-06 |
EP2034536B1 (en) | 2010-11-17 |
DE102008041810A1 (de) | 2009-04-16 |
EP2034536A1 (en) | 2009-03-11 |
CN101442103B (zh) | 2014-02-19 |
DE602007010624D1 (de) | 2010-12-30 |
JP2009071314A (ja) | 2009-04-02 |
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