JP2022548849A - カプセル化トポグラフィ支援自己整合型mramトップ・コンタクト - Google Patents
カプセル化トポグラフィ支援自己整合型mramトップ・コンタクト Download PDFInfo
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- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 14
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
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- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3254—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being semiconducting or insulating, e.g. for spin tunnel junction [STJ]
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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
- 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
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3254—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being semiconducting or insulating, e.g. for spin tunnel junction [STJ]
- H01F10/3259—Spin-exchange-coupled multilayers comprising at least a nanooxide layer [NOL], e.g. with a NOL spacer
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
- H01F41/30—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE]
- H01F41/302—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices
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Abstract
Description
Claims (17)
- 磁気ランダム・アクセス・メモリ(MRAM)デバイスを形成するための方法であって、
第1の誘電体に埋め込まれたインターコネクト上に磁気トンネル接合(MTJ)を形成するステップと、
前記MTJを覆ってカプセル化層を堆積するステップと、
第2の誘電体に前記MTJを埋め込むステップと、
トレンチの底部のところにトポグラフィを作り出す前記MTJの最上部を覆う前記カプセル化層を露出させる前記MTJを覆う前記第2の誘電体にトレンチをパターニングするステップと、
前記トレンチの底部のところの前記トポグラフィを覆って前記トレンチ内に金属配線を形成するステップと、
前記カプセル化層まで前記金属配線をリセスして前記カプセル化層を露出させるステップであり、前記リセスするステップが前記MTJを覆う前記カプセル化層の露出したピークによって区切られたセグメントへと前記金属配線を分断する、前記リセスして露出させるステップと、
前記金属配線の前記セグメント同士の間の前記MTJの前記最上部のところにリセスを形成するために前記カプセル化層の前記露出したピークをリセスするステップと、
前記MTJの前記最上部に自己整合した前記リセス内にコンタクトを形成するステップと
を含む方法。 - 前記トレンチの中へとバリア層を堆積して前記トレンチをライニングするステップと、
前記バリア層上の前記トレンチ内に前記金属配線を形成するステップと
をさらに含む、請求項1に記載の方法。 - 前記コンタクトが、前記MTJと直接接触し、前記コンタクトが、前記バリア層を介して前記金属配線の前記セグメントに接続される、請求項2に記載の方法。
- キャッピング層が、前記インターコネクト上に配置され、前記MTJが、前記インターコネクト上で前記キャッピング層の上に形成される、請求項1ないし3のいずれか一項に記載の方法。
- 前記キャッピング層が、ルテニウム(Ru)、タンタル(Ta)、窒化タンタル(TaN)、チタン(Ti)、窒化チタン(TiN)、タングステン(W)およびこれらの組み合わせから成る群から選択される材料を含む、請求項4に記載の方法。
- 前記MTJの各々が、
少なくとも1つの自由磁性金属層と、
少なくとも1つの固定磁性金属層と、
前記少なくとも1つの自由磁性金属層と前記少なくとも1つの固定磁性金属層との間のトンネル・バリアと
を備える、請求項1ないし5のいずれか一項に記載の方法。 - 前記カプセル化層が、絶縁体を含む、請求項1ないし6のいずれか一項に記載の方法。
- 前記絶縁体が、シリコン窒化物(SiN)である、請求項7に記載の方法。
- パターニングされたときの前記トレンチが、前記MTJの上方の中心に置かれる、請求項1ないし8のいずれか一項に記載の方法。
- パターニングされたときの前記トレンチは、前記MTJのうちの少なくとも1つの最上部を覆う前記カプセル化層の一部分だけが前記トレンチにより露出されるように前記MTJの上方でオフセットされる、請求項1ないし8のいずれか一項に記載の方法。
- 前記バリア層が、チタン(Ti)、窒化チタン(TiN)、タンタル(Ta)、窒化タンタル(TaN)、およびこれらの組み合わせから成る群から選択される材料を含む、請求項2ないし10のいずれか一項に記載の方法。
- 前記コンタクトが、Ru、Ta、TaN、Ti、TiN、W、銅(Cu)、コバルト(Co)、およびこれらの組み合わせから成る群から選択される材料を含む、請求項1ないし11のいずれか一項に記載の方法。
- MRAMデバイスであって、
第1の誘電体に埋め込まれたインターコネクト上に配置されたMTJと、
前記MTJを覆って配置されたカプセル化層と、
前記MTJを囲む第2の誘電体と、
金属配線のセグメント同士の間の前記MTJの最上部のところの前記カプセル化層内のリセスであり、前記金属配線の前記セグメントがバリア層によって前記第2の誘電体とは仕切られる、前記リセスと、
前記MTJの前記最上部に自己整合される前記リセス内に形成されたコンタクトであり、前記コンタクトが前記MTJと直接接触し、前記コンタクトが前記バリア層を介して前記金属配線の前記セグメントに接続される、前記コンタクトと
を備える、MRAMデバイス。 - 前記インターコネクト上に配置されたキャッピング層であって、前記MTJが前記インターコネクト上で前記キャッピング層の上に配置され、前記キャッピング層がRu、Ta、TaN、Ti、TiN、Wおよびこれらの組み合わせから成る群から選択される材料を含む、前記キャッピング層
をさらに備える、請求項13に記載のMRAMデバイス。 - 前記MTJの各々が、
少なくとも1つの自由磁性金属層と、
少なくとも1つの固定磁性金属層と、
前記少なくとも1つの自由磁性金属層と前記少なくとも1つの固定磁性金属層との間のトンネル・バリアと
を備える、請求項13または14に記載のMRAMデバイス。 - 前記バリア層が、Ti、TiN、Ta、TaN、およびこれらの組み合わせから成る群から選択される材料を含む、請求項13ないし15のいずれか一項に記載のMRAMデバイス。
- 前記コンタクトが、Ru、Ta、TaN、Ti、TiN、W、Cu、Co、およびこれらの組み合わせから成る群から選択される材料を含む、請求項13ないし16のいずれか一項に記載のMRAMデバイス。
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US16/572,281 | 2019-09-16 | ||
US16/572,281 US11195993B2 (en) | 2019-09-16 | 2019-09-16 | Encapsulation topography-assisted self-aligned MRAM top contact |
PCT/IB2020/058321 WO2021053455A1 (en) | 2019-09-16 | 2020-09-08 | Encapsulation topography-assisted self-aligned mram top contact |
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JP2022548849A true JP2022548849A (ja) | 2022-11-22 |
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US (1) | US11195993B2 (ja) |
JP (1) | JP2022548849A (ja) |
CN (1) | CN114207722A (ja) |
DE (1) | DE112020003521B4 (ja) |
GB (1) | GB2601100B (ja) |
WO (1) | WO2021053455A1 (ja) |
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US11955152B2 (en) * | 2021-12-03 | 2024-04-09 | International Business Machines Corporation | Dielectric fill for tight pitch MRAM pillar array |
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