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    • 8. 发明专利
    • Superconducting element, superconducting integrated circuit, and method of manufacturing superconducting element
    • 超导元件,超导集成电路及制造超导元件的方法
    • JP2008211082A
    • 2008-09-11
    • JP2007047993
    • 2007-02-27
    • National Institute Of Advanced Industrial & TechnologySaitama Univ国立大学法人埼玉大学独立行政法人産業技術総合研究所
    • TAINO TORUMEIREN HIROAKITAKADA SUSUMUASA SHINICHISERITA YOSUKENAKAGAWA HIROSHIKIKUCHI KATSUYAAOYANAGI MASAHIROAKAHO HIROSHI
    • H01L39/24
    • PROBLEM TO BE SOLVED: To provide a superconducting element in which its manufacturing cost is low and a miniaturization of a junction area S of a Josephson junction is easy without increasing the number of processes and complicating any manufacturing process, and also to provide a superconducting integrated circuit using this superconducting element and a method of manufacturing the superconducting element.
      SOLUTION: The superconducting element is equipped with: a load 32; the Josephson junction providing a lower electrode wiring 33 electrically connected to this load 32, a tunnel barrier film 41 contacting with this lower electrode wiring 33, and an upper electrode 42 having vertical sidewalls and contacting with this tunnel barrier film 41; and a first interlayer insulating film 16 which has inner walls contacting with the vertical sidewalls of the upper electrode 42, surrounds peripheries of the upper electrode 42, has a top face consisting of a flat plane perpendicularly intersecting the inner walls, and also has a thickness thicker than the upper electrode 42. A top face of the first interlayer insulating film 16 is flat in a planarity of ±1/20 of a thickness of the upper electrode 42 within the range separated from the inner walls by at least the maximum size of a top face of the upper electrode 42.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了提供其制造成本低的超导元件,并且约瑟夫逊结的接合面积S的小型化容易,而不增加工艺的数量并使任何制造工艺复杂化,并且还提供 使用该超导元件的超导集成电路和制造超导元件的方法。

      解决方案:超导元件配有:负载32; 约瑟夫逊结提供与该负载32电连接的下电极配线33,与该下电极配线33接触的隧道势垒膜41和具有垂直侧壁并与该隧道势垒膜41接触的上电极42; 并且具有与上电极42的垂直侧壁接触的内壁的第一层间绝缘膜16围绕上电极42的周边具有由与内壁垂直相交的平面构成的顶面,并且还具有厚度 第一层间绝缘膜16的顶面在与内壁分开的范围内的上电极42的厚度的±1/20的平坦度平坦至少最大尺寸 上电极42的顶面。(C)2008,JPO&INPIT