JP7655645B2 - 相変化(pcm)デバイス及び製造方法 - Google Patents
相変化(pcm)デバイス及び製造方法 Download PDFInfo
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- JP7655645B2 JP7655645B2 JP2021151787A JP2021151787A JP7655645B2 JP 7655645 B2 JP7655645 B2 JP 7655645B2 JP 2021151787 A JP2021151787 A JP 2021151787A JP 2021151787 A JP2021151787 A JP 2021151787A JP 7655645 B2 JP7655645 B2 JP 7655645B2
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5678—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using amorphous/crystalline phase transition storage elements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- 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
- 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
- H10B63/10—Phase change RAM [PCRAM, PRAM] 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 having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/021—Formation of switching materials, e.g. deposition of layers
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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
- H10N70/011—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
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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
- H10N70/011—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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- 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
- 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
-
- 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
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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
-
- 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
- H10N70/883—Oxides or nitrides
- H10N70/8833—Binary metal oxides, e.g. TaOx
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Semiconductor Memories (AREA)
Description
Claims (10)
- 相変化メモリ(PCM)デバイスであって、
誘電体層と、
前記誘電体層の内部に配置された底部電極と、
前記底部電極の上に配置され、かつ導電性酸化物の薄膜の上に配置されたAlから形成される金属層を含むライナ材料と、
前記ライナ材料の上に配置された相変化材料と、
前記相変化材料の上、かつ前記誘電体層の内部に配置されたトップ電極と
を含む相変化メモリ(PCM)デバイス。 - 前記底部電極は、第1の金属及び第1の金属窒化物のうちの1つから形成され、前記トップ電極は、第2の金属及び第2の金属窒化物のうちの1つから形成されており、前記底部電極及び前記トップ電極は、同一の材料及び異なった材料のうちの1つから形成される、
請求項1に記載のPCM。 - 前記ライナ材料及び前記相変化材料は、前記誘電体層の内部に配置される、請求項1又は2に記載のPCM。
- 前記誘電体層は、第1の誘電体層と、第2の誘電体層とを含み、前記底部電極は、前記第1の誘電体層の内部に形成され、前記トップ電極は前記第2の誘電体層の内部に形成されており、
前記ライナ材料及び前記相変化材料は、前記第1の誘電体層と前記第2の誘電体層との間の中間層に形成されたビアの内部に配置され、
さらに、前記ライナ材料は、前記トップ電極及び前記底部電極に接触する、
請求項1~3のいずれか1項に記載のPCM。 - 前記導電性酸化物の薄膜は、AlドープのZnO(AZO)、ドープされた酸化インジウム(ITO)、及びドープされた金属酸化物のうちの1つである、請求項1~4のいずれか一項に記載のPCM。
- 前記誘電体層は、複数の誘電体層を含む、請求項1~5のいずれか1項に記載のPCM。
- 相変化メモリ(PCM)デバイスの製造方法であって、
基板を提供すること、
底部電極が第1の誘電体層の内部に配置され、前記底部電極及び前記第1の誘電体層が前記基板の上に配置された前記第1の誘電体層及び前記底部電極を含む第1の構造を形成すること、
前記底部電極の上、かつ第2の誘電体層の内部に配置されたライナ材料を、
前記底部電極の上に導電性酸化物の薄膜を形成すること、及び
前記導電性酸化物の薄膜の上に金属層を形成すること
により形成すること、
前記ライナ材料の上、かつ第3の誘電体層の内部に相変化材料を形成すること、及び
前記相変化材料の上、かつ第4の誘電体層の内部に配置されたトップ電極を形成すること
を含む相変化メモリ(PCM)の製造方法。 - 前記底部電極は、第1の金属又は金属窒化物から形成され、前記トップ電極は、第2の金属又は金属窒化物から形成され、前記第1の金属窒化物及び前記第2の金属窒化物は、同一の金属窒化物及び異なる窒化物のうちの1つである、
請求項7に記載の方法。 - 前記導電性酸化物の薄膜は、AlドープのZnO(AZO)、ドープされた酸化インジウム(ITO)、及びドープされた金属酸化物の内の1つである、請求項7~請求項8のいずれか一項に記載の方法。
- さらに前記第1、第2、第3、及び第4の誘電体層を順に堆積してパターンニングすることを含む請求項7~9のいずれか1項に記載の方法。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/034057 | 2020-09-28 | ||
| US17/034,057 US11805711B2 (en) | 2020-09-28 | 2020-09-28 | Phase-change memory (PCM) including liner reducing resistance drift |
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| Publication Number | Publication Date |
|---|---|
| JP2022055333A JP2022055333A (ja) | 2022-04-07 |
| JP7655645B2 true JP7655645B2 (ja) | 2025-04-02 |
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| JP2021151787A Active JP7655645B2 (ja) | 2020-09-28 | 2021-09-17 | 相変化(pcm)デバイス及び製造方法 |
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| Country | Link |
|---|---|
| US (1) | US11805711B2 (ja) |
| JP (1) | JP7655645B2 (ja) |
| CN (1) | CN114284429B (ja) |
| DE (1) | DE102021122555B4 (ja) |
| GB (1) | GB2600544B (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102748884B1 (ko) * | 2020-09-16 | 2025-01-03 | 삼성전자주식회사 | 정보 저장 물질 패턴을 포함하는 반도체 장치 |
| US11430954B2 (en) * | 2020-11-30 | 2022-08-30 | International Business Machines Corporation | Resistance drift mitigation in non-volatile memory cell |
| US11957069B2 (en) * | 2021-10-22 | 2024-04-09 | International Business Machines Corporation | Contact resistance of a metal liner in a phase change memory cell |
| US20240407178A1 (en) * | 2023-06-05 | 2024-12-05 | International Business Machines Corporation | Phase change memory cell with crystalline structure aligned to seed layer |
| US20260073980A1 (en) * | 2024-09-06 | 2026-03-12 | International Business Machines Corporation | Using phase change memory (pcm) drift to erase hyperdimensional (hd) model for secure edge computing |
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- 2021-09-17 GB GB2113289.9A patent/GB2600544B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102021122555A1 (de) | 2022-03-31 |
| DE102021122555B4 (de) | 2024-12-05 |
| GB2600544B (en) | 2023-01-11 |
| CN114284429A (zh) | 2022-04-05 |
| CN114284429B (zh) | 2026-03-10 |
| JP2022055333A (ja) | 2022-04-07 |
| GB2600544A (en) | 2022-05-04 |
| US20220102626A1 (en) | 2022-03-31 |
| US11805711B2 (en) | 2023-10-31 |
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