Transistors with metal chalcogenide channel materials

    公开(公告)号:US11888034B2

    公开(公告)日:2024-01-30

    申请号:US16435358

    申请日:2019-06-07

    CPC classification number: H01L29/26 H01L27/092 H01L29/16 H01L29/517

    Abstract: Transistor structures employing metal chalcogenide channel materials may be formed where a chalcogen is introduced into at least a portion of a precursor material that comprises reactive metal(s). The precursor material may be substantially metallic, or may be a metallic oxide (e.g., an oxide semiconductor). The metal(s) may be transition, Group II, Group III, Group V elements, or alloys thereof. An oxide of one or more such metals (e.g., IGZO) may be converted into a chalcogenide (e.g., IGZSx or IGZSex) having semiconducting properties. The chalcogenide formed in this manner may be only a few monolayers in thickness (and may be more thermally stable than many oxide semiconductors. Where not all of the precursor material is converted, a transistor structure may retain the precursor material, for example as part of a transistor channel or a gate dielectric. Backend transistors including metal chalcogenide channel materials may be fabricated over silicon CMOS circuitry.

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