JP5020045B2 - 相変化メモリ素子 - Google Patents
相変化メモリ素子 Download PDFInfo
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- JP5020045B2 JP5020045B2 JP2007315873A JP2007315873A JP5020045B2 JP 5020045 B2 JP5020045 B2 JP 5020045B2 JP 2007315873 A JP2007315873 A JP 2007315873A JP 2007315873 A JP2007315873 A JP 2007315873A JP 5020045 B2 JP5020045 B2 JP 5020045B2
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- phase change
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- 230000008859 change Effects 0.000 title claims description 44
- 239000003989 dielectric material Substances 0.000 claims description 35
- 239000012782 phase change material Substances 0.000 claims description 34
- 239000004020 conductor Substances 0.000 claims description 31
- 239000002131 composite material Substances 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 8
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- 238000005530 etching Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002210 silicon-based material Substances 0.000 description 6
- 150000004770 chalcogenides Chemical class 0.000 description 4
- 229910000618 GeSbTe Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052787 antimony Inorganic materials 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- 229910052738 indium Inorganic materials 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052714 tellurium Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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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 having no potential barriers, 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
-
- 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
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Shaping switching materials
- H10N70/063—Shaping switching materials by etching of pre-deposited switching material layers, e.g. lithography
-
- 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
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Shaping switching materials
- H10N70/066—Shaping switching materials by filling of openings, e.g. damascene method
-
- 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
- H10N70/861—Thermal details
- H10N70/8616—Thermal insulation means
-
- 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
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8828—Tellurides, e.g. GeSbTe
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Semiconductor Memories (AREA)
Description
図1aを参照すると、下電極12を有する基板10が提供され、絶縁層14が下電極12を環繞し、下電極12の上表面15を露出する。特に、基板10は、半導体製造工程に使用する基板で、例えば、ケイ素基板である。基板10は、CMOS回路、隔離構造、キャパシタ、ダイオードを含む基板である。図を簡潔にするため、図中では平坦な長方形で表示される。下電極12は、例えば、Al、W、Mo、TiN、あるいは、TiW等の材料からなる。絶縁層14はケイ素含有の化合物、例えば、酸化ケイ素、あるいは、窒化ケイ素である。
まず、図2aを参照すると、下電極102を有する基板100が提供され、絶縁層104が下電極102を環繞し、下電極102の上表面105を露出する。基板100は、半導体製造工程が使用する基板で、例えば、ケイ素基板である。基板100は、CMOS、隔離構造、キャパシタ、ダイオードを含む基板である。図を簡潔にするため、図中では平坦な長方形で表示される。下電極102は、例えば、Al、W、Mo、TiN、あるいは、TiW等の材料からなる。絶縁層104はケイ素含有の化合物、例えば、酸化ケイ素、あるいは、窒化ケイ素である。
まず、図3aを参照すると、下電極202を有する基板200が提供され、絶縁層204が下電極202を環繞し、下電極202の上表面205を露出する。基板200は、半導体製造工程に使用する基板で、例えば、ケイ素基板である。基板200は、CMOS回路、隔離構造、キャパシタ、ダイオードを含む基板である。図を簡潔にするため、図中では平坦な長方形で表示される。下電極202は、例えば、Al、W、Mo、TiN、あるいは、TiW等から形成される。絶縁層204はケイ素含有の化合物、例えば、酸化ケイ素、あるいは、窒化ケイ素である。
12、102、202 下電極
14、104、204 絶縁層
15、105、205 下電極の上表面
16、206、106 誘電材料層
18、208、108 低熱伝導材料層
20、110、210 複合層
22、111 貫通孔
24、112、212 相変化物質層
26、114、214 上電極
206a パターン化された誘電材料層
208a パターン化された低熱伝導材料層
Claims (16)
- 相変化メモリ素子であって、
誘電材料と低熱伝導材料からなる複合層と、
前記複合層中に形成される貫通孔と、
前記貫通孔に充填される相変化物質と、
を有し、
前記低熱伝導材料は、0.1〜1W/mKの熱伝導率を有し、
前記複合層は、前記誘電材料層と前記低熱伝導材料層が交互に重なった層である
ことを特徴とする相変化メモリ素子。 - 前記誘電材料は、酸化ケイ素、窒化ケイ素、あるいは、それらの混合物であることを特徴とする請求項1記載の相変化メモリ素子。
- 前記低熱伝導材料は、相変化物質であることを特徴とする請求項1記載の相変化メモリ素子。
- 前記低熱伝導材料は、窒素をドープした相変化物質であることを特徴とする請求項1記載の相変化メモリ素子。
- 前記低熱伝導材料は、酸素をドープした相変化物質であることを特徴とする請求項1記載の相変化メモリ素子。
- 前記誘電材料層の厚さは少なくとも3nmであることを特徴とする請求項1記載の相変化メモリ素子。
- 前記低熱伝導材料層の厚さは少なくとも3nmであることを特徴とする請求項1記載の相変化メモリ素子。
- 少なくとも一層の誘電材料層と低熱伝導材料を有することを特徴とする請求項1記載の相変化メモリ素子。
- 前記複合層は、前記誘電材料と前記低熱伝導材料の混合物であることを特徴とする請求項1記載の相変化メモリ素子。
- 前記誘電材料と前記低熱伝導材料間の複合層の荷重配分比は、1:10〜1:1であるとことを特徴とする請求項9記載の相変化メモリ素子。
- 前記複合層は、交互の同心環の誘電材料層と低熱伝導材料層を有し、前記貫通孔を環繞することを特徴とする請求項1記載の相変化メモリ素子。
- 前記誘電材料は前記貫通孔周囲に形成され、直接接触することを特徴とする請求項11記載の相変化メモリ素子。
- 相変化メモリ素子であって、
基板と、
前記基板上に形成される電極と、
前記基板上に形成され、誘電材料と低熱伝導材料からなる複合層と、
前記複合層を貫通する貫通孔と、
前記貫通孔に充填され、前記電極と接触する相変化物質層と、
を有し、
前記低熱伝導材料は、0.1〜1W/mKの熱伝導率を有し、
前記複合層は、前記誘電材料と前記低熱伝導材料が交互に重なった層である
ことを特徴とする相変化メモリ素子。 - 前記低熱伝導材料は、相変化物質、窒素をドープした相変化物質、あるいは、酸素をドープした相変化物質であることを特徴とする請求項13記載の相変化メモリ素子。
- 前記複合層は、前記誘電材料と前記低熱伝導材料の混合物であることを特徴とする請求項13記載の相変化メモリ素子。
- 前記複合層は、交互の同心環の誘電材料層と低熱伝導材料層を有し、前記貫通孔を環繞することを特徴とする請求項13記載の相変化メモリ素子。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/748,440 | 2007-05-14 | ||
US11/748,440 US7679163B2 (en) | 2007-05-14 | 2007-05-14 | Phase-change memory element |
Publications (2)
Publication Number | Publication Date |
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JP2008283163A JP2008283163A (ja) | 2008-11-20 |
JP5020045B2 true JP5020045B2 (ja) | 2012-09-05 |
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JP2007315873A Active JP5020045B2 (ja) | 2007-05-14 | 2007-12-06 | 相変化メモリ素子 |
Country Status (4)
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US (1) | US7679163B2 (ja) |
JP (1) | JP5020045B2 (ja) |
CN (1) | CN101308903B (ja) |
TW (1) | TWI367584B (ja) |
Families Citing this family (17)
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FR2913523B1 (fr) * | 2007-03-09 | 2009-06-05 | Commissariat Energie Atomique | Disposistif de memorisation de donnees multi-niveaux a materiau a changement de phase |
TWI347607B (en) | 2007-11-08 | 2011-08-21 | Ind Tech Res Inst | Writing system and method for a phase change memory |
US7897953B2 (en) * | 2008-01-16 | 2011-03-01 | Micron Technology, Inc. | Multi-level programmable PCRAM memory |
US8426838B2 (en) | 2008-01-25 | 2013-04-23 | Higgs Opl. Capital Llc | Phase-change memory |
US8124950B2 (en) * | 2008-08-26 | 2012-02-28 | International Business Machines Corporation | Concentric phase change memory element |
US8324605B2 (en) * | 2008-10-02 | 2012-12-04 | Macronix International Co., Ltd. | Dielectric mesh isolated phase change structure for phase change memory |
US8604457B2 (en) * | 2008-11-12 | 2013-12-10 | Higgs Opl. Capital Llc | Phase-change memory element |
TWI402845B (zh) | 2008-12-30 | 2013-07-21 | Higgs Opl Capital Llc | 相變化記憶體陣列之驗證電路及方法 |
TWI412124B (zh) | 2008-12-31 | 2013-10-11 | Higgs Opl Capital Llc | 相變化記憶體 |
KR101716472B1 (ko) * | 2010-05-24 | 2017-03-15 | 삼성전자 주식회사 | 상변화 물질을 포함하는 비휘발성 메모리 소자 |
CN101937971A (zh) * | 2010-08-18 | 2011-01-05 | 中国科学院半导体研究所 | 垂直相变存储器及制备方法 |
CN101924119A (zh) * | 2010-08-18 | 2010-12-22 | 中国科学院半导体研究所 | 垂直相变存储器及制备方法 |
CN102569644B (zh) * | 2010-12-15 | 2014-03-12 | 中国科学院上海微系统与信息技术研究所 | 用于相变存储器的Sb2Tey-Si3N4复合相变材料及制备方法 |
US8946666B2 (en) | 2011-06-23 | 2015-02-03 | Macronix International Co., Ltd. | Ge-Rich GST-212 phase change memory materials |
US8932901B2 (en) | 2011-10-31 | 2015-01-13 | Macronix International Co., Ltd. | Stressed phase change materials |
CN104966717B (zh) | 2014-01-24 | 2018-04-13 | 旺宏电子股份有限公司 | 一种存储器装置及提供该存储器装置的方法 |
US9672906B2 (en) | 2015-06-19 | 2017-06-06 | Macronix International Co., Ltd. | Phase change memory with inter-granular switching |
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US5933365A (en) | 1997-06-19 | 1999-08-03 | Energy Conversion Devices, Inc. | Memory element with energy control mechanism |
US6580144B2 (en) * | 2001-09-28 | 2003-06-17 | Hewlett-Packard Development Company, L.P. | One time programmable fuse/anti-fuse combination based memory cell |
US6670628B2 (en) * | 2002-04-04 | 2003-12-30 | Hewlett-Packard Company, L.P. | Low heat loss and small contact area composite electrode for a phase change media memory device |
CN1639867A (zh) * | 2002-07-11 | 2005-07-13 | 松下电器产业株式会社 | 非易失性存储器及其制造方法 |
FR2860910B1 (fr) * | 2003-10-10 | 2006-02-10 | Commissariat Energie Atomique | Dispositif a jonction tunnel magnetique et procede d'ecriture/lecture d'un tel dispositif |
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CN1744324A (zh) * | 2005-08-11 | 2006-03-08 | 上海交通大学 | 降低相变存储器编程电流的单元结构 |
US7601995B2 (en) * | 2005-10-27 | 2009-10-13 | Infineon Technologies Ag | Integrated circuit having resistive memory cells |
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-
2007
- 2007-05-14 US US11/748,440 patent/US7679163B2/en active Active
- 2007-10-15 TW TW096138486A patent/TWI367584B/zh active
- 2007-12-06 JP JP2007315873A patent/JP5020045B2/ja active Active
- 2007-12-07 CN CN200710196280.8A patent/CN101308903B/zh active Active
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TW200845443A (en) | 2008-11-16 |
TWI367584B (en) | 2012-07-01 |
CN101308903B (zh) | 2011-06-08 |
US20080283814A1 (en) | 2008-11-20 |
CN101308903A (zh) | 2008-11-19 |
US7679163B2 (en) | 2010-03-16 |
JP2008283163A (ja) | 2008-11-20 |
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