JP2014523647A - メモリセル構造 - Google Patents
メモリセル構造 Download PDFInfo
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- 230000015654 memory Effects 0.000 title claims abstract description 143
- 239000000463 material Substances 0.000 claims description 100
- 239000003989 dielectric material Substances 0.000 claims description 47
- 238000003860 storage Methods 0.000 claims description 19
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- 238000009434 installation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 28
- 239000007772 electrode material Substances 0.000 description 57
- 238000005530 etching Methods 0.000 description 24
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000000231 atomic layer deposition Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052814 silicon oxide Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001020 plasma etching Methods 0.000 description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- 229910052721 tungsten Inorganic materials 0.000 description 5
- 239000010937 tungsten Substances 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000005240 physical vapour deposition Methods 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 150000004770 chalcogenides Chemical class 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 description 3
- 238000005019 vapor deposition process Methods 0.000 description 3
- 238000001039 wet etching Methods 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 229910002531 CuTe Inorganic materials 0.000 description 1
- 229910052946 acanthite Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 1
- 229940056910 silver sulfide Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 description 1
- 238000003631 wet chemical etching Methods 0.000 description 1
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Abstract
【選択図】図2
Description
本開示は、メモリセル構造と、その形成方法とを含む。1つのこのようなメモリセルは、第1の電極の下面に対して90度未満で角度付けされた側壁を有する第1の電極と、第2の電極の電極接触部を含む第2の電極とを含む。第2の電極は、第1の電極の下面に対して90度未満で角度付けされた側壁を有する。第2の電極は第1の電極上にあり、第1の電極と、第2の電極の電極接触部との間に記憶素子が設けられる。
Claims (34)
- メモリセルであって、
第1の電極の下面に対して90度未満で角度付けされた側壁を有する前記第1の電極と、
第2の電極であって、前記第2の電極の電極接触部を含み、前記第1の電極の前記下面に対して90度未満で角度付けされた側壁を有し、前記第2の電極は前記第1の電極上にある、第2の電極と、
前記第1の電極と、前記第2の電極の前記電極接触部との間の記憶素子と、
を含む、メモリセル。 - 前記第2の電極の電極接触部は、前記第1の電極の前記下面に対して90度未満で角度付けされた側壁を有する、請求項1に記載のメモリセル。
- 前記第1の電極は、台形断面積および側壁を有し、前記側壁は、直線状、凹状または凸状からなる群から選択される、請求項1に記載のメモリセル。
- 前記第1の電極の台形断面積の上面は、前記第1の電極の電極接触部であり、前記記憶素子と接触する、請求項3に記載のメモリセル。
- 前記第1の電極は、三角形断面積および側壁を有し、前記側壁は、直線状、凹状または凸状からなる群から選択される、請求項1〜4のうちいずれか1項に記載のメモリセル。
- 前記記憶素子は、可変抵抗材料と、アクセスデバイスとを含む、請求項1〜4のうちいずれか1項に記載のメモリセル。
- 前記電極接触の前記側壁は、前記記憶素子に向かって合流する、請求項1〜4のうちいずれか1項に記載のメモリセル。
- 前記メモリセルの活性領域は、前記第1の電極の頂点と、前記第2の電極の前記電極接触部の頂点との間に設けられる、請求項7に記載のメモリセル。
- メモリセルであって、
非垂直側壁を有する第1の電極の緩やかな先端上に形成された可変抵抗材料と、
前記可変抵抗材料上に形成されかつ内部に谷部が形成された第1の誘電材料と、
前記接触が前記谷部によって規定された非垂直側壁を有するように前記谷部中に形成された第2の電極の接触部と
を含む、メモリセル。 - 前記第2の電極の残り部分は、前記第2の電極の残り部分が前記谷部によって規定された角度付き側壁を有するように、前記谷部内の前記第2の電極の接触部上に形成される、請求項9に記載のメモリセル。
- 前記第1の電極は下部電極であり、第2の誘電材料は、前記下部電極と隣接下部電極との間に形成された角度付き側壁を備えた谷部内に形成される、請求項9に記載のメモリセル。
- 前記第1の電極は下部電極導体線である、請求項9〜11のうちいずれか1項に記載のメモリセル。
- 前記第2の電極は上部電極導体線であり、前記下部電極導体線と非平行である、請求項12に記載のメモリセル。
- メモリセルであって、
可変抵抗材料に先端および角度付き側壁が含まれるように、前記角度付き側壁を有する第1の電極の先端上に形成された前記可変抵抗材料と、
前記可変抵抗材料上に形成された第1の誘電材料であって、前記第1の誘電材料内に谷部が形成される、第1の誘電材料と、
第2の電極の接触部が前記谷部によって規定される角度付き側壁を有するように前記谷部内に形成された前記第2の電極の接触部とを含む、メモリセル。 - 前記第2の電極の残り部分を前記谷部内の前記接触上に形成することにより、前記第2の電極の残り部分は、前記谷部によって規定された角度付き側壁を有する、請求項14に記載のメモリセル。
- 前記第2の電極の前記接触部は、前記可変抵抗材料の前記先端上に形成され、前記可変抵抗材料の前記側壁と重複する、請求項14に記載のメモリセル。
- 前記第2の電極の前記接触部と前記可変抵抗材料との間の接触の表面積は、前記可変抵抗材料の前記側壁によって規定される、請求項14〜16のうちいずれか1項に記載のメモリセル。
- 前記第2の電極の前記接触部の前記角度付き側壁は、前記第1の誘電材料の下面に対して約10度〜約80度で角度付けされる、請求項14〜16のうちいずれか1項に記載のメモリセル。
- メモリセルであって、
サドル領域を有する第1の電極と、
前記サドル領域内に形成された可変抵抗材料であって、前記第1の電極と接触する部分を有する、可変抵抗材料と、
前記可変抵抗材料と接触する部分を有する第2の電極と
を含む、メモリセル。 - 前記第1の電極の前記サドル領域と接触する前記可変抵抗材料の前記部分の界面面積は、前記サドル領域の下側の設置面積の面積よりも大きい、請求項19に記載のメモリセル。
- 前記第2の電極と接触する前記可変抵抗材料の前記部分の表面積は、前記サドル領域の下側の前記第1の電極の表面の表面積よりも大きい、請求項19に記載のメモリセル。
- 前記第2の電極の下面は、前記第1の電極の上面の下側に配置される、請求項19〜21のうちいずれか1項に記載のメモリセル。
- 前記第1の電極および第2の電極は、相互に非平行に配向される。請求項19〜21のうちいずれか1項に記載のメモリセル。
- 前記第1の電極および第2の電極は、誘電材料によって包囲される、請求項19〜21のうちいずれか1項に記載のメモリセル。
- 前記メモリセルは抵抗ランダムアクセスメモリ(RRAM)セルである、請求項19〜21のうちいずれか1項に記載のメモリセル。
- メモリセルのアレイであって、
第1の数の電極であって、前記第1の数の電極はそれぞれ、前記第1の数電極の下面に対して90度未満の角度で角度付けされた側壁を有する、第1の数の電極と、
第2の数電極であって、前記第2の数電極はそれぞれ、前記第1の電極の電極接触部を含み、前記第1の数の電極の前記下面に対して90度未満の角度で角度付けされた側壁を有し、前記第2の数の電極は、前記第1の数の電極上に設けられる、第2の数の電極と、
前記第1の数の電極と、前記第2の数の電極の前記電極接触部との間の複数の記憶素子と
を含む、アレイ。 - 前記第1の数の電極はそれぞれ、第1の誘電材料の複数の部分によってお互いから分離される、請求項26に記載のアレイ。
- 前記第2の数の電極はそれぞれ、第2の誘電材料の複数の部分によってお互いから分離される、請求項26に記載のアレイ。
- 前記メモリセルのアレイは、クロスポイントメモリセルアレイにおいて構成される、請求項26〜28のうちいずれか1項に記載のアレイ。
- メモリセルのアレイであって、
第1の接触材料の複数の部分内に形成された複数のサドル領域であって、前記第1の接触材料の前記複数の部分はそれぞれ、第1の誘電材料によって分離される、複数のサドル領域と、
前記複数のサドル領域それぞれの内部に形成される可変抵抗記憶素子と、
前記複数のサドル領域それぞれの内部の前記可変抵抗記憶素子上に形成された第2の接触材料の複数の部分と
を含む、アレイ。 - 前記第2の接触材料の複数の部分は、第2の誘電材料によって分離される、請求項30に記載のアレイ。
- 前記第1の接触材料の複数の部分と、前記第2の接触材料の複数の部分とは、相互に非平行に配向される、請求項30に記載のアレイ。
- 前記メモリセルのアレイは、クロスポイントメモリセルアレイにおいて構成される、請求項30〜32のうちいずれか1項に記載のアレイ。
- 前記可変抵抗記憶素子は、可変抵抗記憶素子と、アクセスデバイスとを含む、請求項30〜32のうちいずれか1項に記載のアレイ。
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US13/175,482 US8598562B2 (en) | 2011-07-01 | 2011-07-01 | Memory cell structures |
US13/175,482 | 2011-07-01 | ||
PCT/US2012/044581 WO2013006363A2 (en) | 2011-07-01 | 2012-06-28 | Memory cell structures |
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JP (1) | JP5859121B2 (ja) |
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TWI508250B (zh) | 2015-11-11 |
US20160276587A1 (en) | 2016-09-22 |
US10608178B2 (en) | 2020-03-31 |
US9385315B2 (en) | 2016-07-05 |
CN103733339B (zh) | 2016-08-24 |
US20130001501A1 (en) | 2013-01-03 |
KR101535763B1 (ko) | 2015-07-09 |
US20180006218A1 (en) | 2018-01-04 |
US8598562B2 (en) | 2013-12-03 |
US20150200364A1 (en) | 2015-07-16 |
EP2727147A2 (en) | 2014-05-07 |
CN103733339A (zh) | 2014-04-16 |
JP5859121B2 (ja) | 2016-02-10 |
TW201306220A (zh) | 2013-02-01 |
WO2013006363A3 (en) | 2013-04-18 |
WO2013006363A2 (en) | 2013-01-10 |
KR20140040830A (ko) | 2014-04-03 |
US9755144B2 (en) | 2017-09-05 |
US9070874B2 (en) | 2015-06-30 |
EP2727147B1 (en) | 2016-09-07 |
US20140138608A1 (en) | 2014-05-22 |
EP2727147A4 (en) | 2015-03-25 |
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