Patent ID: 8330145
Filing Date: 2012-12-11
Classification: H01L,H03K

Abstract:
1. A superconducting junction circuit, comprising: a plurality of lower electrodes formed by a superconductor layer; a barrier layer provided on a portion of a surface of each of the plurality of lower electrodes; at least one upper electrode formed by a superconductor and covering each barrier layer; and a plurality of superconducting junctions each formed by a corresponding lower electrode and barrier layer and the upper electrode, wherein the lower electrodes forming the superconducting junctions have a rectangular shape in a plan view, wherein each of the at lest one upper electrode and the plurality of lower electrodes is made of an oxide superconductor material, wherein a critical current density of each of the plurality of superconducting junctions is controlled based on a width and/or a depth of the corresponding lower electrode and an area of the corresponding lower electrode, wherein widths of the lower electrodes of the superconducting junctions have an average value Avg1 and a standard deviation σ1, and a ratio σ1/Avg1 is set in a range of 0 to 23%.