JP2009506531A - 磁気デバイスおよびその形成方法 - Google Patents
磁気デバイスおよびその形成方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 54
- 238000005530 etching Methods 0.000 claims abstract description 47
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000000059 patterning Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000005229 chemical vapour deposition Methods 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims 2
- 239000010410 layer Substances 0.000 description 144
- 229910052751 metal Inorganic materials 0.000 description 74
- 239000002184 metal Substances 0.000 description 74
- 230000015654 memory Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 10
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 9
- 229920002120 photoresistant polymer Polymers 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 6
- 238000000635 electron micrograph Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000295 emission spectrum Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000012421 spiking Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B99/00—Subject matter not provided for in other groups of this subclass
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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
- G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
- G11C11/15—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements using multiple magnetic layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76897—Formation of self-aligned vias or contact plugs, i.e. involving a lithographically uncritical step
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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
- H10N50/00—Galvanomagnetic devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/301—Electrical effects
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B61/00—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
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- Condensed Matter Physics & Semiconductors (AREA)
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- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Mram Or Spin Memory Techniques (AREA)
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Abstract
【解決手段】一態様では、磁気デバイスに対して自己整合されるビア・ホールを形成する方法が、以下のステップを含む。磁気デバイスの少なくとも一部分の上に誘電体層が形成される。誘電体層は、磁気デバイスに最も近接して、第1材料を含む下層を有し、下層に対して、磁気デバイスとは反対側の面に、第2材料を含む上層を有するように構成されている。第1材料と第2材料とは異なるものである。第1エッチング段階では、第1エッチャントを使用して、上層から開始し上層を貫通して誘電体層をエッチングする。第2エッチング段階では、下層のエッチングに対して選択的な第2エッチャントを使用して、下層を貫通して誘電体層をエッチングする。
【選択図】図3
Description
Claims (19)
- 磁気デバイスに自己整合されたビア・ホールを形成する方法であって、前記方法が、
前記磁気デバイスの少なくとも一部分の上に誘電体層を形成するステップであって、前記誘電体層が、前記磁気デバイスに最も近接して形成された下層と、前記下層に対して、前記磁気デバイスとは反対側の上面に形成された上層とを有し、前記下層が第1材料を含み、前記上層が前記第1材料とは異なる第2材料を含む、ステップと、
第1エッチング段階において、第1エッチャントを使用して、前記上層から開始して前記上層を少なくとも部分的に貫通して前記誘電体層をエッチングするステップと、
第2エッチング段階において、前記下層に対して選択的な第2エッチャントを使用して前記誘電体層をエッチングし、前記下層を少なくとも部分的に貫通して前記誘電体層をエッチングするステップと、
を含む、方法。 - 前記磁気デバイスが、磁気トンネル接合を含む、請求項1に記載の方法。
- 前記第1エッチャントが前記下層に達すると、これを検出するステップと、
前記第1エッチャントが前記下層に達したら、前記第1エッチング段階を終了するステップと、
をさらに含む、請求項1に記載の方法。 - 前記検出するステップが、前記第1エッチャントが前記下層に達していることを光学的に検出するべく発光トレースを用いるステップをさらに含む、請求項3に記載の方法。
- 前記発光トレースを用いるステップが、前記上層内では実質的に見られない特性を前記下層内で光学的に検出するステップを含む、請求項4に記載の方法。
- 前記第1材料が、窒化シリコンおよび炭窒化シリコンのうちの少なくとも1つを含む、請求項1に記載の方法。
- 前記第2材料が、酸化シリコンを含む、請求項1に記載の方法。
- 前記第1エッチャントが、炭素を基にしたプラズマ材料を含む、請求項1に記載の方法。
- 前記第2エッチャントが、CH3F/O2を基にした材料を含む、請求項1に記載の方法。
- 前記第2エッチャントが、NF3/O2/NH3を基にした材料を含む、請求項1に記載の方法。
- 前記誘電体層を形成するステップが、前記磁気デバイスの上方に垂直方向へ距離をおいて1つ以上の尖塔構造を形成するように前記下層を堆積するステップをさらに含む、請求項1に記載の方法。
- 前記下層が、高密度プラズマ化学気相堆積を用いて堆積される、請求項11に記載の方法。
- 前記磁気デバイスの少なくとも1つの側面の少なくとも一部分の周囲にスペーサ材料がある、請求項1に記載の方法。
- 前記スペーサ材料が、酸化シリコンを含む、請求項13に記載の方法。
- 前記磁気デバイスのパターン形成中にハードマスクを使用するステップであって、前記ハードマスクが前記下層と同じ材料を含む、ステップと、
前記第2エッチング段階中に、前記下層を貫通し、かつ前記ハードマスクを貫通して前記誘電体層をエッチングするステップと、
をさらに含む、請求項1に記載の方法。 - 前記ビア・ホールを金属化するステップをさらに含む、請求項1に記載の方法。
- 前記ビア・ホールが、ダマシン処理方法を使用して金属化される、請求項16に記載の方法。
- 磁気トンネル接合と、
前記磁気トンネル接合の少なくとも一部分の上に形成された誘電体層であって、前記誘電体層が、前記磁気トンネル接合に最も近接する下層と、前記下層に対して、前記磁気トンネル接合とは反対側の面の上層とを有するように構成されている、誘電体層と、
前記誘電体層を実質的に垂直に貫通しており、前記磁気トンネル接合に対して自己整合されたビア・ホールと、
を含む、磁気デバイス。 - 少なくとも1つの磁気デバイスを含んでいる集積回路であって、前記少なくとも1つの磁気デバイスが、
磁気トンネル接合と、
前記磁気トンネル接合の少なくとも一部分の上に形成された誘電体層であって、前記誘電体層が、前記磁気トンネル接合に最も近接する下層と、前記下層に対して、前記磁気トンネル接合とは反対側の面の上層とを有するように構成されている、誘電体層と、
前記誘電体層を実質的に垂直に貫通しており、前記磁気トンネル接合に対して自己整合されたビア・ホールと、
を含む、集積回路。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/209,951 | 2005-08-23 | ||
US11/209,951 US7399646B2 (en) | 2005-08-23 | 2005-08-23 | Magnetic devices and techniques for formation thereof |
PCT/US2006/017418 WO2007024300A2 (en) | 2005-08-23 | 2006-05-04 | Magnetic devices and techniques for formation thereof |
Publications (3)
Publication Number | Publication Date |
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JP2009506531A true JP2009506531A (ja) | 2009-02-12 |
JP2009506531A5 JP2009506531A5 (ja) | 2009-03-26 |
JP4939537B2 JP4939537B2 (ja) | 2012-05-30 |
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JP2008527902A Expired - Fee Related JP4939537B2 (ja) | 2005-08-23 | 2006-05-04 | 磁気デバイスおよびその形成方法 |
Country Status (7)
Country | Link |
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US (2) | US7399646B2 (ja) |
EP (1) | EP1917678B1 (ja) |
JP (1) | JP4939537B2 (ja) |
KR (1) | KR101027226B1 (ja) |
CN (1) | CN101288150B (ja) |
TW (1) | TW200729412A (ja) |
WO (1) | WO2007024300A2 (ja) |
Cited By (2)
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JP2011040580A (ja) * | 2009-08-11 | 2011-02-24 | Toshiba Corp | 磁気抵抗メモリ及びその製造方法 |
JP2013522882A (ja) * | 2010-03-10 | 2013-06-13 | アプライド マテリアルズ インコーポレイテッド | 周期的な酸化およびエッチングのための装置と方法 |
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US9172033B2 (en) | 2013-07-03 | 2015-10-27 | Taiwan Semiconductor Manufacturing Company, Ltd. | MRAM device and fabrication method thereof |
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CN108369852B (zh) * | 2016-04-13 | 2021-05-28 | 深圳线易科技有限责任公司 | 具有集成磁性器件的转接板 |
US10276436B2 (en) | 2016-08-05 | 2019-04-30 | International Business Machines Corporation | Selective recessing to form a fully aligned via |
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2005
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2006
- 2006-05-04 JP JP2008527902A patent/JP4939537B2/ja not_active Expired - Fee Related
- 2006-05-04 KR KR1020087002469A patent/KR101027226B1/ko not_active IP Right Cessation
- 2006-05-04 WO PCT/US2006/017418 patent/WO2007024300A2/en active Search and Examination
- 2006-05-04 EP EP06759161.0A patent/EP1917678B1/en not_active Not-in-force
- 2006-05-04 CN CN2006800305446A patent/CN101288150B/zh not_active Expired - Fee Related
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Cited By (3)
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JP2011040580A (ja) * | 2009-08-11 | 2011-02-24 | Toshiba Corp | 磁気抵抗メモリ及びその製造方法 |
US8829580B2 (en) | 2009-08-11 | 2014-09-09 | Kabushiki Kaisha Toshiba | Magnetoresistive memory and manufacturing method |
JP2013522882A (ja) * | 2010-03-10 | 2013-06-13 | アプライド マテリアルズ インコーポレイテッド | 周期的な酸化およびエッチングのための装置と方法 |
Also Published As
Publication number | Publication date |
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CN101288150B (zh) | 2010-05-19 |
KR101027226B1 (ko) | 2011-04-06 |
EP1917678A2 (en) | 2008-05-07 |
EP1917678B1 (en) | 2013-11-20 |
JP4939537B2 (ja) | 2012-05-30 |
US20070048950A1 (en) | 2007-03-01 |
US8164128B2 (en) | 2012-04-24 |
EP1917678A4 (en) | 2012-08-22 |
WO2007024300A3 (en) | 2008-06-05 |
WO2007024300A2 (en) | 2007-03-01 |
TW200729412A (en) | 2007-08-01 |
CN101288150A (zh) | 2008-10-15 |
US20080043379A1 (en) | 2008-02-21 |
US7399646B2 (en) | 2008-07-15 |
KR20080045122A (ko) | 2008-05-22 |
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