JP2008053310A - 半導体記憶装置及び半導体記憶装置の製造方法 - Google Patents
半導体記憶装置及び半導体記憶装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000003860 storage Methods 0.000 title abstract description 5
- 239000012782 phase change material Substances 0.000 claims abstract description 58
- 238000000151 deposition Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 19
- 239000011810 insulating material Substances 0.000 claims description 17
- 230000000149 penetrating effect Effects 0.000 claims description 16
- 238000005498 polishing Methods 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 3
- 239000007772 electrode material Substances 0.000 claims description 2
- 238000003475 lamination Methods 0.000 abstract 4
- 239000010410 layer Substances 0.000 description 116
- 239000011229 interlayer Substances 0.000 description 44
- 239000000463 material Substances 0.000 description 11
- 239000000758 substrate Substances 0.000 description 9
- 238000005530 etching Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000011669 selenium Substances 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 150000004770 chalcogenides Chemical class 0.000 description 2
- 150000001787 chalcogens Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052714 tellurium Inorganic materials 0.000 description 2
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 2
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 2
- 229910021342 tungsten silicide Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- IVHJCRXBQPGLOV-UHFFFAOYSA-N azanylidynetungsten Chemical compound [W]#N IVHJCRXBQPGLOV-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052798 chalcogen Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910021476 group 6 element Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 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
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8825—Selenides, e.g. GeSe
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/30—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors
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- H—ELECTRICITY
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- 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
- H10N70/066—Shaping switching materials by filling of openings, e.g. damascene method
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- H10N70/231—Multistable switching devices, e.g. memristors based on solid-state phase change, e.g. between amorphous and crystalline phases, Ovshinsky effect
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- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
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- H10N70/801—Constructional details of multistable switching devices
- H10N70/861—Thermal details
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- 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
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8828—Tellurides, e.g. GeSbTe
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Abstract
【解決手段】上部電極66は、積層方向に直交する平面に沿って相変化層63を外側から囲んでいる。上部電極66は、第1の領域84外の残りの第2の領域85内に配設されているため、上部電極66とヒータ電極43とは積層方向において重ならない。上部電極66は、相変化層63から積層方向に直交する平面に沿って延在している第3の領域86内に配設されていることが好ましい。また、上部電極66は、相変化層63から積層方向に延在する第4の領域87内には存在せず、第4の領域87外の第5の領域88内に配設されていることが好ましい。
【選択図】図6
Description
2 メモリセルアレイ
3a及び3b Xデコーダ
4a及び4b リードライトスイッチ
5 ゲート線
6 ビット線
7 グランド線
8 抵抗素子
9 トランジスタ
10 半導体基板
11 STI
12 ゲート電極
13a ドレイン層
13b ソース層
14 第1の層間絶縁膜
15 セルコンタクトプラグ
16 第2の層間絶縁膜
17 GNDコンタクトプラグ
18 周辺コンタクト
20 グランド配線
21 配線
22 配線
30 第3の層間絶縁膜
31 コンタクト
32 コンタクト材料層
34 ミドルコンタクトプラグ
40 第1のベース絶縁膜
41 コンタクト
42 ヒータ材料層
43 ヒータ電極
50 第2のベース絶縁膜
51 上部電極層
52 ストッパ絶縁膜
53 レジスト
54 開口パターン
55 貫通部
56 第1の内壁
57 第2の内壁
58 第3の内壁
60 GST膜
61 窪み部
62 断熱材料層
63 相変化層
64 断熱部
65 カバー絶縁膜
66 上部電極
67 ストッパ層
68 カバー層
70 第4の層間絶縁膜
71 コンタクトプラグ
72 コンタクトプラグ
73 上層配線
80 底面
81 上面
82 側面
84 第1の領域
85 第2の領域
86 第3の領域
87 第4の領域
88 第5の領域
90 断熱部
91 第1の断熱部
92 第2の断熱部
93 相変化層
100 フィールド
101 周辺領域
Claims (10)
- 相変化材料により形成された相変化層と、
前記相変化層に接続されたヒータ電極と、
前記相変化層に接続された上部電極と、を備える半導体記憶装置であって、
前記上部電極は、前記上部電極を前記所定の積層方向に貫く貫通部を有し、
前記相変化層は、前記貫通部の内側から前記上部電極に接続され、
前記ヒータ電極は、前記所定の積層方向において前記貫通部と重なる位置に配設されている、
半導体記憶装置。 - 前記相変化層は、前記貫通部を貫通している、
請求項1に記載の半導体記憶装置。 - 前記相変化層は、
環状に延在する上面と、
前記所定の積層方向において前記ヒータ電極と前記上面との間に位置する底面と、
前記底面の外周縁部と前記上面の外周縁部との間に延在する側面と、
前記上面の内周縁部から前記底面側に窪んだ窪み部と、を有し、
前記ヒータ電極は、前記底面に接続され、
前記上部電極は、前記側面に接続されている、
請求項1又は請求項2の半導体記憶装置。 - 断熱材料により形成されると共に前記窪み部内に充填されている断熱部を備える、
請求項3の半導体記憶装置。 - 複数のヒータ電極を備え、
前記相変化層には、少なくとも2つのヒータ電極が接続されている、
請求項1から請求項4のいずれかの半導体記憶装置。 - 複数の前記相変化層を備え、
前記上部電極は、前記所定の積層方向に直交する配線方向に延設されると共に、前記配線方向に沿って配設された複数の前記貫通部を有し、
各前記相変化層は、各前記貫通部に配設されている、
請求項1から請求項5のいずれかの半導体記憶装置。 - ヒータ電極が所定の積層方向に貫通している第1の絶縁膜上に第2の絶縁膜を堆積し、
前記第2の絶縁膜上に上部電極材料層を堆積し、
前記第2の絶縁膜と前記上部電極層とを貫き前記ヒータ電極を露出する貫通部を形成し、
前記貫通部内に相変化材料を堆積する、
半導体記憶装置の製造方法。 - 前記第3の絶縁膜を前記上部電極層上に堆積し、
前記貫通部を形成する段階で、前記第2の絶縁膜と前記上部電極層と前記第3の絶縁膜とを貫く貫通部を形成し、
前記相変化材料を堆積する段階で、前記貫通部内を含む前記第3の絶縁膜上に前記相変化材料層を堆積し、
前記第3の絶縁膜をストッパとして前記相変化材料を研磨することにより、前記貫通部外の相変化材料を除去する、
請求項7の半導体記憶装置の製造方法。 - 前記相変化材料を堆積する段階で、前記貫通部内の前記相変化材料の積層方向における厚さを前記第2の絶縁膜の積層方向の厚さよりも薄く形成する、
請求項8の半導体記憶装置の製造方法。 - 前記貫通部内を含む前記第3の絶縁膜上に堆積された前記相変化材料上に断熱材料層を堆積し、
前記相変化材料を研磨する段階で、前記断熱材料層を研磨することにより前記貫通部外の前記断熱材料層を除去する、
請求項9の半導体記憶装置の製造方法。
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JP2006225768A JP4257352B2 (ja) | 2006-08-22 | 2006-08-22 | 半導体記憶装置及び半導体記憶装置の製造方法 |
TW096125362A TW200812004A (en) | 2006-08-22 | 2007-07-12 | Semiconductor memory device and fabrication method thereof |
US11/826,870 US7723717B2 (en) | 2006-08-22 | 2007-07-19 | Semiconductor memory device and fabrication method thereof |
CNA2007101424171A CN101132051A (zh) | 2006-08-22 | 2007-08-22 | 半导体存储器件及其制造方法 |
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CN105428524B (zh) * | 2015-11-03 | 2018-04-13 | 江苏时代全芯存储科技有限公司 | 制造相变化记忆体的方法 |
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JP4591833B2 (ja) * | 2006-01-17 | 2010-12-01 | エルピーダメモリ株式会社 | 相変化メモリ装置および相変化メモリ装置の製造方法 |
JP4691454B2 (ja) * | 2006-02-25 | 2011-06-01 | エルピーダメモリ株式会社 | 相変化メモリ装置およびその製造方法 |
JP4437297B2 (ja) * | 2006-06-22 | 2010-03-24 | エルピーダメモリ株式会社 | 半導体記憶装置及び半導体記憶装置の製造方法 |
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2006
- 2006-08-22 JP JP2006225768A patent/JP4257352B2/ja active Active
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2007
- 2007-07-12 TW TW096125362A patent/TW200812004A/zh unknown
- 2007-07-19 US US11/826,870 patent/US7723717B2/en active Active
- 2007-08-22 CN CNA2007101424171A patent/CN101132051A/zh active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009218597A (ja) * | 2008-03-11 | 2009-09-24 | Samsung Electronics Co Ltd | 抵抗メモリ素子及びその形成方法 |
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US7723717B2 (en) | 2010-05-25 |
US20080048170A1 (en) | 2008-02-28 |
JP4257352B2 (ja) | 2009-04-22 |
TW200812004A (en) | 2008-03-01 |
CN101132051A (zh) | 2008-02-27 |
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