JP5467241B2 - メモリ素子及びその製造方法、並びにメモリ素子を備えた記憶装置 - Google Patents
メモリ素子及びその製造方法、並びにメモリ素子を備えた記憶装置 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 45
- 230000005684 electric field Effects 0.000 claims description 18
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 229910052691 Erbium Inorganic materials 0.000 claims description 8
- 229910052775 Thulium Inorganic materials 0.000 claims description 8
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910052793 cadmium Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 229910052727 yttrium Inorganic materials 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 7
- 229910052689 Holmium Inorganic materials 0.000 claims description 7
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 229910052706 scandium Inorganic materials 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 239000013078 crystal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 230000005291 magnetic effect Effects 0.000 description 8
- 238000004544 sputter deposition Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000001451 molecular beam epitaxy Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910017112 Fe—C Inorganic materials 0.000 description 2
- 229910052765 Lutetium Inorganic materials 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000000609 electron-beam lithography Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229940126062 Compound A Drugs 0.000 description 1
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 1
- 229910052789 astatine Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 229910003443 lutetium oxide Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- MPARYNQUYZOBJM-UHFFFAOYSA-N oxo(oxolutetiooxy)lutetium Chemical compound O=[Lu]O[Lu]=O MPARYNQUYZOBJM-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
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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
-
- 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
- H10N70/801—Constructional details of multistable switching devices
- H10N70/821—Device geometry
-
- 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
- H10N70/823—Device geometry adapted for essentially horizontal current flow, e.g. bridge 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
- H10N70/826—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
- H10N70/881—Switching materials
- H10N70/883—Oxides or nitrides
- H10N70/8836—Complex metal oxides, e.g. perovskites, spinels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/101—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration including resistors or capacitors only
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Description
(1)電圧印加用の電極は2つ1組として抵抗体を挟んで対向させて設けるとともに、電圧印加用の電極を抵抗体の電気抵抗を検出するための電圧検出用の電極と兼用していること。
(2)電圧印加用の電極は抵抗体を構成している化合物のc軸方向に離隔させて設けたこと。
21,21",51,81 第1電極
22,22',22",52,82 第2電極
30,30',30",60,90 抵抗体
(1)酸化ルテチウム(Lu2O3)と酸化鉄(III)(Fe2O3)とを1:2の割合で混合するとともに、ボールミルで約1時間混合し、混合物を生成する。
(2)前記混合物を所定形状に成形して、酸素雰囲気下で、24時間、800℃に加熱して仮焼成体を生成する。
(3)FZ(Floating Zone)法によって前記仮焼成体を本焼成することにより、単結晶のLuFe2O4とする。このとき、一酸化炭素と二酸化炭素の混合ガスであるCO−CO2混合ガスの雰囲気下で結晶成長させている。
Lu−B位置
O −C位置
Fe−C位置
O −B位置
O −C位置
Fe−B位置
O −B位置
Lu−C位置
O −A位置
Fe−A位置○
O −C位置○
O −A位置○
Fe−C位置○
O −C位置
Lu−A位置
O −B位置
Fe−B位置
O −A位置
O −B位置
Fe−A位置
O −A位置
Lu−B位置
Claims (5)
- 電圧を印加することにより電気抵抗が変化する抵抗体と、
前記抵抗体に所定の電圧を印加するための電圧印加用の電極と
を有するメモリ素子であって、
前記抵抗体は、W層を有し希土類元素を含有した層状三角格子構造の化合物で構成され、外部から電場を作用させることによりW層中に正電荷の役割を有する領域と負電荷の役割を有する領域を生じさせて電気双極子の状態を制御し、該電気双極子の状態に応じて異なる電気抵抗を生じさせるものであり、
前記抵抗体を、Rを、Sc,Y,Dy,Ho,Er,Tm,Yb,Lu,Ceから選ばれる少なくとも1種類の元素、
Ma及びMbを、Ti,Mn,Fe,Co,Cu,Ga,Zn,Al,Mg,Cdから重複を許して選ばれる少なくとも1種類の元素、
nを1以上の整数、
mを0以上の整数、
δを0以上0.2以下の実数として、(RMbO 3-δ ) n (MaO) m として表される層状三角格子構造を有する化合物、またはその化合物のRの一部を正二価以下の元素により置換した化合物で構成したメモリ素子。 - 前記電圧印加用の電極は2つ1組として前記抵抗体を挟んで対向させて設けるとともに、前記電圧印加用の電極を前記抵抗体の電気抵抗を検出するための電圧検出用の電極と兼用している請求項1に記載のメモリ素子。
- 前記電圧印加用の電極は、前記抵抗体を構成している前記化合物のc軸方向に離隔させ
て設けている請求項2に記載のメモリ素子。 - 電圧を印加することにより電気抵抗が変化する抵抗体と、
前記抵抗体に所定の電圧を印加するための電圧印加用の電極と
を有するメモリ素子の製造方法であって、
前記抵抗体は、W層を有し希土類元素を含有した層状三角格子構造の化合物で構成され、外部から電場を作用させることによりW層中に正電荷の役割を有する領域と負電荷の役割を有する領域を生じさせて電気双極子の状態を制御し、該電気双極子の状態に応じて異なる電気抵抗を生じさせるものであり、
前記抵抗体を、Rを、Sc,Y,Dy,Ho,Er,Tm,Yb,Lu,Ceから選ばれる少なくとも1種類の元素、
Ma及びMbを、Ti,Mn,Fe,Co,Cu,Ga,Zn,Al,Mg,Cdから重複を許して選ばれる少なくとも1種類の元素、
nを1以上の整数、
mを0以上の整数、
δを0以上0.2以下の実数として、(RMbO 3-δ ) n (MaO) m として表される層状三角格子構造を有する化合物、またはその化合物のRの一部を正二価以下の元素により置換した化合物で形成する工程を有するメモリ素子の製造方法。 - 電圧を印加することにより電気抵抗が変化する抵抗体と、
前記抵抗体に所定の電圧を印加するための電圧印加用の電極と
をそれぞれ有する複数のメモリ素子を備えた記憶装置であって、
前記抵抗体は、W層を有し希土類元素を含有した層状三角格子構造を有する化合物で構成され、外部から電場を作用させることによりW層中に正電荷の役割を有する領域と負電荷の役割を有する領域を生じさせて電気双極子の状態を制御し、該電気双極子の状態に応じて異なる電気抵抗を生じさせるものであり、
前記抵抗体を、Rを、Sc,Y,Dy,Ho,Er,Tm,Yb,Lu,Ceから選ばれる少なくとも1種類の元素、
Ma及びMbを、Ti,Mn,Fe,Co,Cu,Ga,Zn,Al,Mg,Cdから重複を許して選ばれる少なくとも1種類の元素、
nを1以上の整数、
mを0以上の整数、
δを0以上0.2以下の実数として、(RMbO 3-δ ) n (MaO) m として表される層状三角格子構造を有する化合物、またはその化合物のRの一部を正二価以下の元素により置換した化合物で構成した記憶装置。
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JP2010531886A JP5467241B2 (ja) | 2008-09-30 | 2009-09-30 | メモリ素子及びその製造方法、並びにメモリ素子を備えた記憶装置 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002368200A (ja) * | 2001-06-08 | 2002-12-20 | Sony Corp | 半導体記憶装置 |
JP2006318982A (ja) * | 2005-05-10 | 2006-11-24 | Sony Corp | 記憶素子及びその製造方法、エッチング方法 |
JP2007223886A (ja) * | 2005-11-22 | 2007-09-06 | Japan Synchrotron Radiation Research Inst | 物質中の電子密度を双極子状に分布させることで誘電体特性を実現する方法および材料 |
JP2007280591A (ja) * | 2006-03-14 | 2007-10-25 | Qimonda Ag | メモリセル、メモリセルを備えたメモリ、およびメモリセル内にデータを書き込む方法 |
JP2007317765A (ja) * | 2006-05-24 | 2007-12-06 | Seiko Epson Corp | 強誘電体メモリおよびその製造方法 |
WO2009028426A1 (ja) * | 2007-08-24 | 2009-03-05 | National University Corporation Okayama University | 電子素子及び電気伝導度制御方法 |
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- 2009-09-30 WO PCT/JP2009/067047 patent/WO2010038786A1/ja active Application Filing
- 2009-09-30 JP JP2010531886A patent/JP5467241B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002368200A (ja) * | 2001-06-08 | 2002-12-20 | Sony Corp | 半導体記憶装置 |
JP2006318982A (ja) * | 2005-05-10 | 2006-11-24 | Sony Corp | 記憶素子及びその製造方法、エッチング方法 |
JP2007223886A (ja) * | 2005-11-22 | 2007-09-06 | Japan Synchrotron Radiation Research Inst | 物質中の電子密度を双極子状に分布させることで誘電体特性を実現する方法および材料 |
JP2007280591A (ja) * | 2006-03-14 | 2007-10-25 | Qimonda Ag | メモリセル、メモリセルを備えたメモリ、およびメモリセル内にデータを書き込む方法 |
JP2007317765A (ja) * | 2006-05-24 | 2007-12-06 | Seiko Epson Corp | 強誘電体メモリおよびその製造方法 |
WO2009028426A1 (ja) * | 2007-08-24 | 2009-03-05 | National University Corporation Okayama University | 電子素子及び電気伝導度制御方法 |
Non-Patent Citations (1)
Title |
---|
JPN6008060765; N.Ikeda et al.: '"Ferroelectricity from iron valence ordering in the charge-frustrated system LuFe2O4"' Nature Vol.436, No.7054, August 2005, 20050825, pp.1136-1138 * |
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