Josephson junction and a method of making the same
AssigneesRikagaku Kenkyusho, Science and Technology Agency
InventorHiroshi Ohta
Life of this patent
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Abstract
Disclosed is an improved Josephson junction comprising a superconductor-separator-superconductor laminar depositions on a substrate, the overlying and underlying superconductor layers being laid offset to each other, and a weak link extending from one of the superconductor layers to the other across the thickness of the intervenient separator. A triple layer superconducting device according to this invention has as short barrier length and as low capacitance as possible, and is characteristic of a large product of junction resistance and critical current. Also, the geometrical configuration of the device is most appropriate for the purpose of massproduction.
Claims26
A superconducting device comprising a laminar body including first and second superconductor layers, an insulative spacer layer therebetween and a conductive junction extending between said first and second superconductor layers and across the thickness of the insulative spacer layer and said first and second superconductor layers being offset and superposed with respect to each other such that only a portion of each of said superconductor layers overly each other.
A superconducting device comprising a laminar body including first and second superimposed superconductor layers, an insulative spacer layer therebetween and a conductive junction extending between said first and second superconductor layers and across the thickness of the insulative spacer layer.
A superconducting device comprising a laminar body including at least first, second and third superconductor layers an insulative spacer layer disposed between said third layer and said first and second layers, a first conductive junction extending between said third layer and said first layer, a second conductive junction extending between said third layer and said second layer, said first and said second conductive junctions extending across the thickness of said insulative spacer layer, said third layer being disposed on said insulative spacer layer, said insulative spacer layer being offset and superposed with respect to said first and said second layers such that only a portion of said third superconductor layer overlies a portion of each of the first and second layers.
A superconducting device comprising a laminar body including at least one set of semiconductor layers, each said set including a pair of first superconductor layers and a second superconductor layer, at least one insulative spacer layer disposed between the first pair of layers and said second layer, and conductive junctions extending between said second layer and each layer of said pair of superconductor layers and across the thickness of the insulative spacer layer and said second superconductor layer being offset and superposed with respect to each layer of said pair of superconductor layers such that only a portion of said second superconductor layer overlies a portion of each layer of said pair of superconductor layers.
Dependencies are inferred from the claim text.