JP2007288083A - 半導体記憶装置およびその製造方法 - Google Patents
半導体記憶装置およびその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 150000004770 chalcogenides Chemical group 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000009466 transformation Effects 0.000 abstract 7
- 239000010410 layer Substances 0.000 description 53
- 239000012782 phase change material Substances 0.000 description 15
- 239000011229 interlayer Substances 0.000 description 10
- 239000000758 substrate Substances 0.000 description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 7
- 229910052721 tungsten Inorganic materials 0.000 description 7
- 239000010937 tungsten Substances 0.000 description 7
- 238000005530 etching Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 229910021332 silicide Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910000763 AgInSbTe Inorganic materials 0.000 description 1
- 229910005542 GaSb Inorganic materials 0.000 description 1
- 229910005537 GaSeTe Inorganic materials 0.000 description 1
- 229910005872 GeSb Inorganic materials 0.000 description 1
- 229910000618 GeSbTe Inorganic materials 0.000 description 1
- 229910005898 GeSn Inorganic materials 0.000 description 1
- 229910005900 GeTe Inorganic materials 0.000 description 1
- 229910018321 SbTe Inorganic materials 0.000 description 1
- 229910018219 SeTe Inorganic materials 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910006913 SnSb Inorganic materials 0.000 description 1
- 229910004284 Te81Ge15Sb2S2 Inorganic materials 0.000 description 1
- 229910010037 TiAlN Inorganic materials 0.000 description 1
- 229910008482 TiSiN Inorganic materials 0.000 description 1
- 229910008807 WSiN Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- FESBVLZDDCQLFY-UHFFFAOYSA-N sete Chemical compound [Te]=[Se] FESBVLZDDCQLFY-UHFFFAOYSA-N 0.000 description 1
- -1 silicide nitride Chemical class 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
-
- 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
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Shaping switching materials
- H10N70/063—Shaping switching materials by etching of pre-deposited switching material layers, e.g. lithography
-
- 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
- H10N70/20—Multistable switching devices, e.g. memristors
- 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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- 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
- H10N70/821—Device geometry
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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
- H10N70/841—Electrodes
- H10N70/8413—Electrodes adapted for resistive heating
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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
- 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
- H10N70/8828—Tellurides, e.g. GeSbTe
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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
- H10N70/884—Switching materials based on at least one element of group IIIA, IVA or VA, e.g. elemental or compound semiconductors
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Abstract
【解決手段】下部電極13の上方に、相変化層11のエッジ部を形成する。エッジ部は、下部電極と相変化層とのコンタクトエリアの上方で相変化層の膜厚が変化するようにその断面がテーパー形状とされ、酸化膜20により埋め込まれている。この構成により、相変化が起きる領域を制限できるので、効率よく加熱することができ、加熱に必要な電流を低減できる。
【選択図】図1
Description
12 上部電極
13 下部電極
14 基板
15 ゲート電極
16a,16b コンタクト
17 グランド配線
18a,18b コンタクト
19 層間絶縁膜
20 酸化膜
21 シリコン基板
22 層間絶縁膜
23 コンタクトホール
24 TiN膜
25 層間絶縁膜
26 カルコゲナイド膜
27 タングステン膜
31 酸化膜
Claims (9)
- 下部電極と上部電極との間に設けられた相変化層を備える半導体記憶装置において、
前記相変化層が前記下部電極の上方に位置するテーパー部を有し、当該相変化層の最上平面の面積が当該相変化層の最下平面の面積よりも小さいことを特徴とする半導体記憶装置。 - 請求項1に記載された半導体記憶装置において
前記テーパー部が、前記下部電極と前記相変化層とが接する領域の上方に位置していることを特徴とする半導体記憶装置。 - 請求項1又は2に記載された半導体記憶装置において、
前記テーパー部が酸化膜で埋め込まれていることを特徴とする半導体記憶装置。 - 請求項1、2又は3に記載された半導体記憶装置において、
前記相変化層のテーパー部の形状に対応させて、前記下部電極がカップ型電極の一部を切断した形状であることを特徴とする半導体記憶装置。 - 請求項1乃至4のいずれか一つに記載された半導体記憶装置において、
前記相変化層がカルコゲナイドであることを特徴とする半導体記憶装置。 - 下部電極と上部電極との間に設けられた相変化層を備える半導体記憶装置の製造方法において、
前記下部電極の一部が露出する絶縁膜平面を形成する工程と、
前記絶縁膜平面上に相変化層を形成する工程と、
前記相変化層の一部を除去し、当該相変化層に、前記下部電極の上方に位置するテーパー部を形成する工程と、
を含むことを特徴とする半導体記憶装置の製造方法。 - 請求項6に記載された半導体記憶装置の製造方法において、
前記相変化層を形成する工程の後、前記相変化層の上に前記上部電極を形成する工程をさらに含み、
前記テーパー部を形成する工程において、前記上部電極の一部も除去することを特徴とする半導体記憶装置の製造方法。 - 請求項6又は7に記載された半導体記憶装置の製造方法において、
前記テーパー部を酸化膜で埋め込む工程をさらに含むことを特徴とする半導体記憶装置の製造方法。 - 請求項6,7又は8に記載された半導体記憶装置の製造方法において、
前記テーパー部を形成する工程は、前記相変化層のテーパー部の形状に対応させて、前記下部電極の一部をも除去する工程であることを特徴とする半導体記憶装置の製造方法。
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JP2006116388A JP4777820B2 (ja) | 2006-04-20 | 2006-04-20 | 半導体記憶装置およびその製造方法 |
US11/785,535 US7868312B2 (en) | 2006-04-20 | 2007-04-18 | Semiconductor memory device and manufacturing method thereof |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009253299A (ja) * | 2008-04-04 | 2009-10-29 | Hynix Semiconductor Inc | 相変化メモリ素子及びその製造方法 |
KR100979755B1 (ko) * | 2008-03-28 | 2010-09-02 | 삼성전자주식회사 | 상변화 메모리 소자 및 그 제조방법들 |
US8552412B2 (en) | 2009-12-21 | 2013-10-08 | Samsung Electronics Co., Ltd. | Variable resistance memory device and method of forming the same |
Families Citing this family (10)
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US20100051896A1 (en) * | 2008-09-02 | 2010-03-04 | Samsung Electronics Co., Ltd. | Variable resistance memory device using a channel-shaped variable resistance pattern |
KR20100082604A (ko) * | 2009-01-09 | 2010-07-19 | 삼성전자주식회사 | 가변저항 메모리 장치 및 그의 형성 방법 |
US8012790B2 (en) * | 2009-08-28 | 2011-09-06 | International Business Machines Corporation | Chemical mechanical polishing stop layer for fully amorphous phase change memory pore cell |
US8283202B2 (en) | 2009-08-28 | 2012-10-09 | International Business Machines Corporation | Single mask adder phase change memory element |
US8283650B2 (en) * | 2009-08-28 | 2012-10-09 | International Business Machines Corporation | Flat lower bottom electrode for phase change memory cell |
US8233317B2 (en) * | 2009-11-16 | 2012-07-31 | International Business Machines Corporation | Phase change memory device suitable for high temperature operation |
US8129268B2 (en) * | 2009-11-16 | 2012-03-06 | International Business Machines Corporation | Self-aligned lower bottom electrode |
US7943420B1 (en) * | 2009-11-25 | 2011-05-17 | International Business Machines Corporation | Single mask adder phase change memory element |
KR20110103160A (ko) * | 2010-03-12 | 2011-09-20 | 삼성전자주식회사 | 반도체 소자 및 이를 제조하는 방법 |
US9660188B2 (en) * | 2014-08-28 | 2017-05-23 | Taiwan Semiconductor Manufacturing Co., Ltd. | Phase change memory structure to reduce leakage from the heating element to the surrounding material |
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JP2004158852A (ja) * | 2002-11-01 | 2004-06-03 | Samsung Electronics Co Ltd | 相変換記憶素子及びその製造方法 |
JP2006019688A (ja) * | 2004-06-30 | 2006-01-19 | Hynix Semiconductor Inc | 相変化記憶素子及びその製造方法 |
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US6147395A (en) * | 1996-10-02 | 2000-11-14 | Micron Technology, Inc. | Method for fabricating a small area of contact between electrodes |
US6015977A (en) * | 1997-01-28 | 2000-01-18 | Micron Technology, Inc. | Integrated circuit memory cell having a small active area and method of forming same |
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JP2004158852A (ja) * | 2002-11-01 | 2004-06-03 | Samsung Electronics Co Ltd | 相変換記憶素子及びその製造方法 |
JP2006019688A (ja) * | 2004-06-30 | 2006-01-19 | Hynix Semiconductor Inc | 相変化記憶素子及びその製造方法 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100979755B1 (ko) * | 2008-03-28 | 2010-09-02 | 삼성전자주식회사 | 상변화 메모리 소자 및 그 제조방법들 |
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JP2009253299A (ja) * | 2008-04-04 | 2009-10-29 | Hynix Semiconductor Inc | 相変化メモリ素子及びその製造方法 |
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US8552412B2 (en) | 2009-12-21 | 2013-10-08 | Samsung Electronics Co., Ltd. | Variable resistance memory device and method of forming the same |
US8962438B2 (en) | 2009-12-21 | 2015-02-24 | Samsung Electronics Co., Ltd. | Variable resistance memory device and method of forming the same |
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US20070246440A1 (en) | 2007-10-25 |
US7868312B2 (en) | 2011-01-11 |
JP4777820B2 (ja) | 2011-09-21 |
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