KR20070026157A - 상 변화 메모리 셀 내에 상 변화층 형성 - Google Patents
상 변화 메모리 셀 내에 상 변화층 형성 Download PDFInfo
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- KR20070026157A KR20070026157A KR1020060083032A KR20060083032A KR20070026157A KR 20070026157 A KR20070026157 A KR 20070026157A KR 1020060083032 A KR1020060083032 A KR 1020060083032A KR 20060083032 A KR20060083032 A KR 20060083032A KR 20070026157 A KR20070026157 A KR 20070026157A
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- H—ELECTRICITY
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- H10N70/00—Solid-state devices without a potential-jump barrier or surface barrier, 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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- G—PHYSICS
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- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0004—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements comprising amorphous/crystalline phase transition cells
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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
- H10B63/32—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors of the bipolar type
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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
- H10B63/80—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
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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 without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Patterning of the switching material
- H10N70/063—Patterning of the switching material by etching of pre-deposited switching material layers, e.g. lithography
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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 without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Patterning of the switching material
- H10N70/068—Patterning of the switching material by processes specially adapted for achieving sub-lithographic dimensions, e.g. using spacers
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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 without a potential-jump barrier or surface barrier, 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
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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 without a potential-jump barrier or surface barrier, 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 without a potential-jump barrier or surface barrier, 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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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
Abstract
Description
Claims (26)
- 반도체 바디 위에 상 변화(phase change) 물질의 상 변화층을 형성하는 단계;상기 상 변화층 위에 하드 마스크 구조물을 생성하는 단계;상기 하드 마스크 구조물 위에 레지스트 마스크를 생성하는 단계;상기 레지스트 마스크를 이용하여 상기 하드 마스크 구조물을 정형함으로써 하드 마스크를 형성하는 단계;상기 레지스트 마스크를 제거하는 단계; 및상기 레지스트 마스크를 제거한 후 상기 하드 마스크를 이용하여 상기 상 변화층을 정형하는 단계를 포함하는 방법.
- 제1항에 있어서,하드 마스크 구조물을 생성하는 단계는 유전체 물질을 포함하는 하드 마스크 구조물을 형성하는 단계를 포함하는 방법.
- 제1항에 있어서,상기 상 변화층을 정형하는 단계는 상기 하드 마스크를 적어도 부분적으로 제거하는 단계를 포함하는 방법.
- 제1항에 있어서,상기 상 변화층 위에 캡 구조물을 형성하는 단계를 포함하고, 상기 하드 마스크 구조물이 상기 캡 구조물과 접촉하여 형성되는 방법.
- 제1항에 있어서,상기 레지스트 마스크를 제거하는 단계는 포토레지스트 스트리핑(stripping)을 포함하는 방법.
- 제1항에 있어서,상기 반도체 바디 위에는 유전체 구조층을, 상기 유전체 구조층 내에는 발열 소자를 형성하는 단계를 더 포함하는 방법.
- 제6항에 있어서,상기 상 변화층을 형성하는 단계는 상기 상 변화층을 상기 발열 소자에 직접 접촉하도록 피착하는 단계를 포함하고, 그에 의해 상기 발열 소자와 상기 상 변화층의 접촉 영역에서 저장 소자를 정의하는 단계를 포함하는 방법.
- 제7항에 있어서,저장 소자를 정의하는 단계는 적어도 하나의 서브리소그래픽 치 수(sublithographic dimension)를 갖는 접촉 영역에서 상기 소자를 정의하는 단계를 포함하는 방법.
- 칼코겐화물 층(chalcogenide layer);상기 칼코겐화물 층을 덮는 배리어 층; 및상기 배리어 층 위의 마스크 층을 포함하는 반도체 구조물.
- 제9항에 있어서,상기 배리어 층은 금속을 포함하는 반도체 구조물.
- 제10항에 있어서,상기 금속은 티타늄을 포함하는 반도체 구조물.
- 제11항에 있어서,상기 금속은 Ti/TiN을 포함하는 반도체 구조물.
- 제12항에 있어서,상기 배리어 층은 약 45nm인 반도체 구조물.
- 제9항에 있어서,상기 배리어 층은 상기 칼코겐화물 층을 완전히 덮는 반도체 구조물.
- 제9항에 있어서,상기 배리어 층 상부에 레지스트 마스크를 포함하는 반도체 구조물.
- 제9항에 있어서,상기 배리어 층 상부에 하드 마스크를 포함하는 반도체 구조물.
- 제16항에 있어서,상기 하드 마스크 상부에 레지스트 마스크를 포함하는 반도체 구조물.
- 제9항에 있어서,두 개의 분리된 칼코겐화물 층들을 포함하는 반도체 구조물.
- 반도체 바디 위에 상 변화 물질의 상 변화층을 형성하는 단계;상기 상 변화층 위에 하드 마스크 구조물을 생성하는 단계;상기 하드 마스크 구조물 위에 레지스트 마스크를 생성하는 단계;상기 레지스트 마스크를 이용하여 상기 하드 마스크 구조물을 정형함으로써 하드 마스크를 형성하는 단계;상기 레지스트 마스크를 제거하는 단계; 및상기 레지스트 마스크를 제거한 후 상기 하드 마스크를 이용하여 상기 상 변화층을 정형하는 단계를 포함하는 공정에 의해 형성되는 제품.
- 제19항에 있어서,상기 상 변화층을 정형하는 단계는 상기 하드 마스크를 적어도 부분적으로 제거하는 단계를 포함하는 공정에 의해 형성되는 제품.
- 제19항에 있어서,상기 상 변화층 위에 캡 구조물을 형성하는 단계를 포함하고, 상기 하드 마스크 구조물은 상기 캡 구조물과 접촉하여 형성되는 공정에 의해 형성되는 제품.
- 제19항에 있어서,상기 레지스트 마스크를 제거하는 단계는 포토레지스트 스트리핑을 포함하는 공정에 의해 형성되는 제품.
- 제19항에 있어서,상기 반도체 바디 위에는 유전체 구조층을, 상기 유전체 구조층 내에는 발열 소자를 형성하는 단계를 더 포함하는 공정에 의해 형성되는 제품.
- 제23항에 있어서,상기 상 변화층을 형성하는 단계는 상기 상 변화층을 상기 발열 소자와 직접 접촉하여 피착하는 단계를 포함하고, 그에 의해 상기 발열 소자와 상기 상 변화층의 접촉 영역에서 저장 소자를 정의하는 공정에 의해 형성되는 제품.
- 제24항에 있어서,저장 소자를 정의하는 단계는 적어도 하나의 서브리소그래픽 치수를 갖는 상기 접촉 영역에서 상기 소자를 정의하는 단계를 포함하는 공정에 의해 형성되는 제품.
- 제19항에 있어서,상기 제품은 상기 상 변화층을 포함하는 상 변화 메모리 및 프로세서를 포함하는 제품.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/215,403 | 2005-08-30 | ||
US11/215,403 US20070045606A1 (en) | 2005-08-30 | 2005-08-30 | Shaping a phase change layer in a phase change memory cell |
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KR20070026157A true KR20070026157A (ko) | 2007-03-08 |
KR100808365B1 KR100808365B1 (ko) | 2008-02-27 |
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KR1020060083032A KR100808365B1 (ko) | 2005-08-30 | 2006-08-30 | 상 변화 메모리 셀 내에 상 변화층 형성 |
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US (2) | US20070045606A1 (ko) |
JP (1) | JP5020570B2 (ko) |
KR (1) | KR100808365B1 (ko) |
CN (1) | CN100505363C (ko) |
TW (1) | TWI319635B (ko) |
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CN1925186A (zh) | 2007-03-07 |
US20070045606A1 (en) | 2007-03-01 |
TW200709480A (en) | 2007-03-01 |
TWI319635B (en) | 2010-01-11 |
CN100505363C (zh) | 2009-06-24 |
US20120298946A1 (en) | 2012-11-29 |
JP5020570B2 (ja) | 2012-09-05 |
JP2007067403A (ja) | 2007-03-15 |
KR100808365B1 (ko) | 2008-02-27 |
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