JP5964573B2 - 磁気トンネル接合構造体の製造方法及びこれを利用する磁気メモリ素子の製造方法 - Google Patents
磁気トンネル接合構造体の製造方法及びこれを利用する磁気メモリ素子の製造方法 Download PDFInfo
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- JP5964573B2 JP5964573B2 JP2011260388A JP2011260388A JP5964573B2 JP 5964573 B2 JP5964573 B2 JP 5964573B2 JP 2011260388 A JP2011260388 A JP 2011260388A JP 2011260388 A JP2011260388 A JP 2011260388A JP 5964573 B2 JP5964573 B2 JP 5964573B2
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- 230000005291 magnetic effect Effects 0.000 title claims description 193
- 238000000034 method Methods 0.000 title claims description 90
- 238000004519 manufacturing process Methods 0.000 title claims description 37
- 239000010410 layer Substances 0.000 claims description 231
- 238000005530 etching Methods 0.000 claims description 93
- 230000003647 oxidation Effects 0.000 claims description 43
- 238000007254 oxidation reaction Methods 0.000 claims description 43
- 239000011229 interlayer Substances 0.000 claims description 41
- 239000000758 substrate Substances 0.000 claims description 26
- 239000011241 protective layer Substances 0.000 claims description 18
- 239000011261 inert gas Substances 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 238000004380 ashing Methods 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910001882 dioxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 8
- 230000005415 magnetization Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910003321 CoFe Inorganic materials 0.000 description 2
- 229910019236 CoFeB Inorganic materials 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- ZDZZPLGHBXACDA-UHFFFAOYSA-N [B].[Fe].[Co] Chemical compound [B].[Fe].[Co] ZDZZPLGHBXACDA-UHFFFAOYSA-N 0.000 description 2
- FQMNUIZEFUVPNU-UHFFFAOYSA-N cobalt iron Chemical compound [Fe].[Co].[Co] FQMNUIZEFUVPNU-UHFFFAOYSA-N 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 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
- H10B—ELECTRONIC MEMORY DEVICES
- H10B61/00—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
- H10B61/20—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors
- H10B61/22—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors of the field-effect transistor [FET] type
-
- 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
-
- 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
- H10N50/01—Manufacture or treatment
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/902—Specified use of nanostructure
- Y10S977/932—Specified use of nanostructure for electronic or optoelectronic application
- Y10S977/933—Spintronics or quantum computing
- Y10S977/935—Spin dependent tunnel, SDT, junction, e.g. tunneling magnetoresistance, TMR
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mram Or Spin Memory Techniques (AREA)
- Hall/Mr Elements (AREA)
Description
100 基板
120 トンネル絶縁層パターン
121 トンネル絶縁層
140 磁気トンネル接合層パターン
141 磁気トンネル接合層
150 側壁絶縁層パターン
151 生成物
200 基板
201 素子分離層
202 ドレーン領域
203 ソース領域
211 ゲート絶縁層
212 ゲート電極
214 ランディングコンタクトプラグ
215 ソースラインコンタクトプラグ
221 ソースライン
222 下部電極コンタクトプラグ
230 側壁保護層パターン
241 上部電極コンタクトプラグ
250 ビットライン
260 保護層
300 マスクパターン
Claims (9)
- 基板上にコンタクトプラグを含む第1層間絶縁層を形成し、
前記第1層間絶縁層上に第1磁性層、トンネル絶縁層、及び第2磁性層を順次に積層して磁気トンネル接合層を形成し、
前記第2磁性層上にマスクパターンを形成し、
少なくとも一つのエッチング工程及び少なくとも一つの酸化工程を複数回行い、磁気トンネル接合層パターン及び前記磁気トンネル接合層パターンの少なくとも一つの側壁上に側壁絶縁層パターンを形成し、
前記少なくとも一つのエッチング工程は、不活性ガスと前記マスクパターンを利用して前記磁気トンネル接合層の一部をエッチングする第1エッチング工程を含み、
前記少なくとも一つの酸化工程は、前記磁気トンネル接合層のエッチング面に付着した第1エッチング生成物を酸化させる第1酸化工程を含み、
前記磁気トンネル接合層パターン及び前記側壁絶縁層パターンを形成した後、
前記側壁絶縁層パターンを利用して前記側壁絶縁層パターン周囲の前記第1層間絶縁層の一部をエッチングして前記側壁絶縁層パターン上に側壁保護層パターンを形成することをさらに含む磁気メモリ素子の製造方法。 - 前記第1層間絶縁層の一部をエッチングすることは、不活性ガスを利用することを含む請求項1に記載の磁気メモリ素子の製造方法。
- 前記側壁保護層パターンを形成した後、
前記側壁保護層パターンにアッシング(ashing)工程を行うことをさらに含み、
前記アッシング工程は、酸素ガスまたは酸素プラズマを利用した少なくとも一つの処理を含む請求項1に記載の磁気メモリ素子の製造方法。 - 前記第1層間絶縁層、前記磁気トンネル接合層パターン、及び前記側壁絶縁層パターン上にコンフォーマルに保護層を形成することをさらに含む請求項1に記載の磁気メモリ素子の製造方法。
- 前記コンタクトプラグと前記第1磁性層が互いに直接接触している請求項1に記載の磁気メモリ素子の製造方法。
- 前記第1層間絶縁層上に第2層間絶縁層形成し、
前記第2層間絶縁層上にビットラインを形成することをさらに含む請求項1に記載の磁気メモリ素子の製造方法。 - 前記不活性ガスはNH3ガスを含む請求項1に記載の磁気メモリ素子の製造方法。
- 前記酸化工程は、200W以下の電力を利用して行われる請求項1に記載の磁気メモリ素子の製造方法。
- 前記少なくとも一つのエッチング工程は、少なくとも2回のエッチング工程を含み、
前記トンネル絶縁層は、前記少なくとも2回のエッチング工程のうち一つによってエッチングされる請求項1に記載の磁気メモリ素子の製造方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100119756A KR20120058113A (ko) | 2010-11-29 | 2010-11-29 | 자기 터널 접합 구조체의 제조 방법 및 이를 이용하는 자기 메모리 소자의 제조 방법 |
KR10-2010-0119756 | 2010-11-29 |
Publications (2)
Publication Number | Publication Date |
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JP2012119684A JP2012119684A (ja) | 2012-06-21 |
JP5964573B2 true JP5964573B2 (ja) | 2016-08-03 |
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JP2011260388A Active JP5964573B2 (ja) | 2010-11-29 | 2011-11-29 | 磁気トンネル接合構造体の製造方法及びこれを利用する磁気メモリ素子の製造方法 |
Country Status (5)
Country | Link |
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US (1) | US8796042B2 (ja) |
JP (1) | JP5964573B2 (ja) |
KR (1) | KR20120058113A (ja) |
CN (1) | CN102479918B (ja) |
TW (1) | TWI533352B (ja) |
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