KR20040033017A - 상 변화 재료 메모리 디바이스 - Google Patents
상 변화 재료 메모리 디바이스 Download PDFInfo
- Publication number
- KR20040033017A KR20040033017A KR10-2004-7003309A KR20047003309A KR20040033017A KR 20040033017 A KR20040033017 A KR 20040033017A KR 20047003309 A KR20047003309 A KR 20047003309A KR 20040033017 A KR20040033017 A KR 20040033017A
- Authority
- KR
- South Korea
- Prior art keywords
- phase change
- change material
- electrode
- memory
- barrier layer
- Prior art date
Links
- 239000012782 phase change material Substances 0.000 title claims abstract description 76
- 230000015654 memory Effects 0.000 claims abstract description 27
- 230000004888 barrier function Effects 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 3
- 239000011810 insulating material Substances 0.000 claims abstract 4
- 238000000034 method Methods 0.000 claims description 21
- 239000012212 insulator Substances 0.000 claims description 19
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000007521 mechanical polishing technique Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 23
- 230000008859 change Effects 0.000 description 9
- 239000011148 porous material Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 238000001312 dry etching Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 150000004770 chalcogenides Chemical class 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000618 GeSbTe Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H10B63/80—Arrangements comprising multiple bistable or multi-stable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays
-
- 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
- H10N70/068—Shaping switching materials by processes specially adapted for achieving sub-lithographic dimensions, e.g. using spacers
-
- 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
- H10N70/826—Device geometry adapted for essentially vertical current flow, e.g. sandwich or pillar type devices
- H10N70/8265—Device geometry adapted for essentially vertical current flow, e.g. sandwich or pillar type devices on sidewalls of dielectric structures, e.g. mesa-shaped or cup-shaped devices
-
- 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
- H10N70/861—Thermal details
- H10N70/8616—Thermal insulation means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Semiconductor Memories (AREA)
Abstract
Description
Claims (39)
- 싱귤레이팅된 개구를 형성하는 단계;상기 개구에 컵형상 상 변화 재료를 형성하는 단계; 및컵형상 상 변화 재료에 열적 절연성 재료를 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제1 항에 있어서, 전극 및 장벽층을 형성하는 단계를 포함하고, 상기 전극은 상기 장벽층을 통하여 상기 상 변화 재료에 연결된 것을 특징으로 하는 방법.
- 제1 항에 있어서, 상기 상 변화 재료에 전기적으로 연결된 전극을 형성하고, 장벽층을 이용하여 상기 상 변화 재료로부터 상기 전극내의 종을 분리시키는 단계를 포함하는 것을 특징으로 하는 방법.
- 제1 항에 있어서, 상향으로 향하는 열 손실을 감소시키기 위해 상기 상 변화 재료를 절연시키는 단계를 포함하는 것을 특징으로 하는 방법.
- 제1 항에 있어서, 평탄화 공정을 이용하여 상기 상 변화 재료를 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제5 항에 있어서, 화학기계 연마 기술을 이용하여 상기 상 변화 재료를 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제1 항에 있어서, 상기 싱귤레이팅된 개구에 측벽 스페이서를 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제7 항에 있어서, 상기 개구에 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제8 항에 있어서, 상기 상 변화 재료의 컵형상을 형성하도록 상기 측벽 스페이서를 이용하는 단계를 포함하는 것을 특징으로 하는 방법.
- 지지 구조체;상기 지지 구조체 위에 있고, 그 내부에 형성된 개구를 갖는, 절연체;상기 개구내의 컵형상 상 변화 재료; 및상기 컵형상 상 변화 재료내의 열적 절연성 재료를 포함하는 것을 특징으로 하는 메모리.
- 제10 항에 있어서, 상기 열적 절연성 재료는 상기 컵형상 상 변화 재료를 채우는 것을 특징으로 하는 메모리.
- 제10 항에 있어서, 전극 및, 상기 전극과 상기 상 변화 재료사이에 있는 장벽층을 포함하고, 상기 전극은 상기 장벽층을 통하여 상기 상 변화 재료에 연결된 것을 특징으로 하는 메모리.
- 제10 항에 있어서, 상기 상 변화 재료로부터 상기 전극내의 종을 분리시키기 위해 상기 상 변화 재료에 전기적으로 연결된 전극을 포함하는 것을 특징으로 하는 메모리.
- 제10 항에 있어서, 상향으로 향한 열 손실을 감소시키도록 상기 상 변화 재료 위에 절연체를 포함하는 것을 특징으로 하는 메모리.
- 제10 항에 있어서, 상기 상 변화 재료는 싱귤레이팅되는 것을 특징으로 하는 메모리.
- 제15 항에 있어서, 상기 싱귤레이팅된 개구내에 측벽 스페이서를 포함하는 것을 특징으로 하는 메모리.
- 제16 항에 있어서, 상기 개구내에 전극을 포함하는 것을 특징으로 하는 메모리.
- 제17 항에 있어서, 상기 컵형상 상 변화 재료는 상기 측벽 스페이서 위에 형성되는 것을 특징으로 하는 메모리.
- 제10 항에 있어서, 상 변화 재료는 일반적으로 측벽 스페이서에 평행한 것을 특징으로 하는 메모리.
- 상 변화 재료를 형성하는 단계;상기 상 변화 재료 위에 전극을 형성하는 단계; 및상기 상 변화 재료로부터 상기 전극을 분리하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제20 항에 있어서, 상기 상 변화 재료와 상기 전극사이에 장벽층을 통합하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제21 항에 있어서, 컨덕터의 장벽층을 통합하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제22 항에 있어서, 티타늄 질화물로 된 상기 장벽층을 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 상 변화 재료;상기 상 변화 재료 위에 있는 전극; 및상기 상 변화 재료와 상기 전극 사이에 있는 장벽층을 포함하는 것을 특징으로 하는 메모리.
- 제24 항에 있어서, 상기 장벽층은 도전층인 것을 특징으로 하는 메모리.
- 제25 항에 있어서, 상기 장벽층은 티타늄을 포함하는 것을 특징으로 하는 메모리.
- 제24 항에 있어서, 상기 장벽층은 상기 전극내의 종이 상기 상 변화 재료에 들어가는 것을 방지하는 것을 특징으로 하는 메모리.
- 구조체에 개구를 형성하는 단계;상 변화 재료의 층을 상기 개구 내부 및 상기 구조체 위에 형성하는 단계; 및상기 상 변화 재료를 평탄화하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제28 항에 있어서, 상기 상 변화 재료를 화학기계적 연마시키는 단계를 포함하는 것을 특징으로 하는 방법.
- 제28 항에 있어서, 측벽 스페이서를 상기 개구에 형성하고 이어서 상기 상 변화 재료를 증착시키는 단계를 포함하는 것을 특징으로 하는 방법.
- 제28 항에 있어서, 컵형상 상 변화 재료를 형성하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제28 항에 있어서, 컵형상 상 변화 재료를 절연체로 채우는 단계를 포함하는 것을 특징으로 하는 방법.
- 지지 구조체;상기 지지 구조체내의 개구; 및상기 개구내의 평탄화된 상 변화 재료를 포함하는 것을 특징으로 하는 메모리.
- 제33 항에 있어서, 상기 상 변화 재료는 컵형상인 것을 특징으로 하는 메모리.
- 제34 항에 있어서, 상기 컵형상 상 변화 재료내의 절연체를 포함하는 것을특징으로 하는 메모리.
- 제33 항에 있어서, 상기 상 변화 재료는 인캡슐레이팅되어 있는 것을 특징으로 하는 메모리.
- 제33 항에 있어서, 상기 상 변화 재료는 싱귤레이팅되어 있는 것을 특징으로 하는 메모리.
- 제33 항에 있어서, 상기 상 변화 재료에 연결된 전극을 포함하는 것을 특징으로 하는 메모리.
- 제38 항에 있어서, 상기 전극과 상기 재료사이에 장벽층을 포함하는 것을 특징으로 하는 메모리.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/948,830 | 2001-09-07 | ||
US09/948,830 US6586761B2 (en) | 2001-09-07 | 2001-09-07 | Phase change material memory device |
PCT/US2002/026376 WO2003023875A2 (en) | 2001-09-07 | 2002-08-20 | Phase change material memory device |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20040033017A true KR20040033017A (ko) | 2004-04-17 |
KR100595450B1 KR100595450B1 (ko) | 2006-06-30 |
Family
ID=25488290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020047003309A KR100595450B1 (ko) | 2001-09-07 | 2002-08-20 | 상 변화 재료 메모리 디바이스 |
Country Status (6)
Country | Link |
---|---|
US (2) | US6586761B2 (ko) |
KR (1) | KR100595450B1 (ko) |
CN (1) | CN100379046C (ko) |
DE (1) | DE10297191B4 (ko) |
TW (1) | TW559915B (ko) |
WO (1) | WO2003023875A2 (ko) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100868321B1 (ko) * | 2006-04-14 | 2008-11-11 | 재단법인서울대학교산학협력재단 | 다중 비트 상변화 메모리 소자의 단위 셀 |
KR100873172B1 (ko) * | 2005-11-02 | 2008-12-10 | 키몬다 아게 | 다층 단열 물질을 갖는 상-변화 메모리 셀 및 그 제조 방법 |
KR100922392B1 (ko) * | 2007-05-04 | 2009-10-19 | 삼성전자주식회사 | 상변화 메모리 소자 및 그 형성 방법 |
US8552412B2 (en) | 2009-12-21 | 2013-10-08 | Samsung Electronics Co., Ltd. | Variable resistance memory device and method of forming the same |
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US6734455B2 (en) * | 2001-03-15 | 2004-05-11 | Micron Technology, Inc. | Agglomeration elimination for metal sputter deposition of chalcogenides |
US7102150B2 (en) * | 2001-05-11 | 2006-09-05 | Harshfield Steven T | PCRAM memory cell and method of making same |
US6955940B2 (en) * | 2001-08-29 | 2005-10-18 | Micron Technology, Inc. | Method of forming chalcogenide comprising devices |
US20030047765A1 (en) * | 2001-08-30 | 2003-03-13 | Campbell Kristy A. | Stoichiometry for chalcogenide glasses useful for memory devices and method of formation |
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US6815818B2 (en) * | 2001-11-19 | 2004-11-09 | Micron Technology, Inc. | Electrode structure for use in an integrated circuit |
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EP1318552A1 (en) * | 2001-12-05 | 2003-06-11 | STMicroelectronics S.r.l. | Small area contact region, high efficiency phase change memory cell and fabrication method thereof |
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US20030143782A1 (en) | 2002-01-31 | 2003-07-31 | Gilton Terry L. | Methods of forming germanium selenide comprising devices and methods of forming silver selenide comprising structures |
US6867064B2 (en) * | 2002-02-15 | 2005-03-15 | Micron Technology, Inc. | Method to alter chalcogenide glass for improved switching characteristics |
US6791885B2 (en) | 2002-02-19 | 2004-09-14 | Micron Technology, Inc. | Programmable conductor random access memory and method for sensing same |
US7151273B2 (en) | 2002-02-20 | 2006-12-19 | Micron Technology, Inc. | Silver-selenide/chalcogenide glass stack for resistance variable memory |
US6809362B2 (en) | 2002-02-20 | 2004-10-26 | Micron Technology, Inc. | Multiple data state memory cell |
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KR100922392B1 (ko) * | 2007-05-04 | 2009-10-19 | 삼성전자주식회사 | 상변화 메모리 소자 및 그 형성 방법 |
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Also Published As
Publication number | Publication date |
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WO2003023875A3 (en) | 2004-03-18 |
US6908812B2 (en) | 2005-06-21 |
DE10297191B4 (de) | 2009-07-23 |
US6586761B2 (en) | 2003-07-01 |
TW559915B (en) | 2003-11-01 |
KR100595450B1 (ko) | 2006-06-30 |
US20030201469A1 (en) | 2003-10-30 |
DE10297191T5 (de) | 2004-10-07 |
CN1554125A (zh) | 2004-12-08 |
WO2003023875A2 (en) | 2003-03-20 |
CN100379046C (zh) | 2008-04-02 |
US20030047762A1 (en) | 2003-03-13 |
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