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    • 6. 发明公开
    • A method for forming a transistor structure comprising a fin-shaped channel structure
    • Verfahren zur Herstellung einer Transistorstruktur mit einerflossenförmigenKanalstruktur
    • EP3016143A1
    • 2016-05-04
    • EP14191340.0
    • 2014-10-31
    • IMEC VZW
    • Collaert, NadineEneman, GeertHoriguchi, NaotoKim, Min-SooRooyackers, RitaVeloso, AnabelaWitters, Liesbeth
    • H01L29/423H01L29/786H01L29/66
    • H01L21/76224H01L21/32H01L21/32055H01L29/0649H01L29/42392H01L29/66742H01L29/78696
    • A method for forming a transistor structure comprising a fin-shaped channel structure, comprising:
      - providing a layer stack embedded laterally in STI structures;
      - recessing the STI structures adjacent to the layer stack to thereby expose an upper portion of the layer stack, the upper portion comprising at least a channel portion;
      - providing one or more protection layers on the upper portion of the layer stack;
      - after providing one or more protection layers, further recessing the STI structures selectively to the protection layers and the layer stack, to thereby expose a central portion of the layer stack;
      - removing the central portion of the layer stack, resulting in a freestanding upper part and a lower part of the layer stack being physically separated from each other;
      wherein providing the layer stack comprises providing an etch stop layer at a position directly below the channel portion, such that the freestanding upper part of the layer stack comprises an etch stop layer at its lower surface after selectively removing the central portion.
    • 一种用于形成包括鳍状沟道结构的晶体管结构的方法,包括:提供在STI结构中横向嵌入的层堆叠; - 将STI结构凹陷到层堆叠附近,从而暴露层堆叠的上部,上部至少包括通道部分; - 在所述层堆叠的上部提供一个或多个保护层; - 在提供一个或多个保护层之后,进一步将STI结构选择性地凹入保护层和层堆叠,从而暴露层堆叠的中心部分; - 去除层堆叠的中心部分,导致层堆叠的独立上部和下部在物理上彼此分离; 其中提供层堆叠包括在通道部分正下方的位置处提供蚀刻停止层,使得层堆叠的独立上部在选择性地去除中心部分之后在其下表面处包含蚀刻停止层。