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Campbell, 2012 - Google Patents

Forced ion migration for chalcogenide phase change memory device

Campbell, 2012

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Document ID
11597993335834188348
Author
Campbell K
Publication year

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Non-volatile memory devices with two stacked layers of chalcogenide materials comprising the active memory device have been investigated for their potential as phase-change memories. The devices tested included GeTe/SnTe, Ge. sub. 2Se. sub. 3/SnTe, and Ge. sub …
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    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/12—Details
    • H01L45/122—Device geometry
    • H01L45/1233—Device geometry adapted for essentially vertical current flow, e.g. sandwich or pillar type devices
    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
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    • H01L45/00—Solid state devices adapted for rectifying, amplifying, oscillating or switching without a potential-jump barrier or surface barrier, e.g. dielectric triodes; Ovshinsky-effect devices; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof
    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/14—Selection of switching materials
    • H01L45/141—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
    • H01L45/143—Selenides, e.g. GeSe
    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
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    • H01L45/00—Solid state devices adapted for rectifying, amplifying, oscillating or switching without a potential-jump barrier or surface barrier, e.g. dielectric triodes; Ovshinsky-effect devices; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof
    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/16—Manufacturing
    • H01L45/1608—Formation of the switching material, e.g. layer deposition
    • H01L45/1625—Formation of the switching material, e.g. layer deposition by physical vapor deposition, e.g. sputtering
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    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/14—Selection of switching materials
    • H01L45/141—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
    • H01L45/144—Tellurides, e.g. GeSbTe
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    • H01L—SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
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    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/14—Selection of switching materials
    • H01L45/145—Oxides or nitrides
    • H01L45/146—Binary metal oxides, e.g. TaOx
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    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/06—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory based on solid-state phase change, e.g. between amorphous and crystalline phases, Ovshinsky effect
    • H—ELECTRICITY
    • H01—BASIC ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L45/00—Solid state devices adapted for rectifying, amplifying, oscillating or switching without a potential-jump barrier or surface barrier, e.g. dielectric triodes; Ovshinsky-effect devices; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof
    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/16—Manufacturing
    • H01L45/1666—Patterning of the switching material
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    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/12—Details
    • H01L45/1253—Electrodes
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    • H01L45/04—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory
    • H01L45/08—Bistable or multistable switching devices, e.g. for resistance switching non-volatile memory based on migration or redistribution of ionic species, e.g. anions, vacancies
    • 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 - G11C25/00
    • G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00 - G11C25/00 using resistance random access memory [RRAM] elements
    • G11C13/0021—Auxiliary circuits
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    • H01L27/24—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including solid state components for rectifying, amplifying or switching without a potential-jump barrier or surface barrier, e.g. resistance switching non-volatile memory structures
    • H01L27/2463—Arrangements comprising multiple bistable or multistable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays, details of the horizontal layout
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    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group

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