Patent ID: 8178472
Filing Date: 2012-05-15
Classification: G01R,H01L,Y10S

Abstract:
1. A superconducting device of a multilayer structure in which a first to an (n−1)th oxide superconducting layers (n is an integer more than one) and a first to an (n−1)th oxide insulating layers are alternately superposed on each other on an insulating substrate, and in which an n-th oxide superconducting layer is superposed on the (n−1)th oxide insulating layer as an uppermost-level oxide insulating layer, and which includes a Josephson junction, wherein (i) the Josephson junction is formed by forming at least one of junction electrodes concurrently with the time when the n-th oxide superconducting layer as an uppermost-level oxide superconducting layer is superposed, (ii) at least the uppermost-level oxide superconducting layer of the multilayer structure includes a circuit element pattern, (iii) the uppermost-level oxide superconducting layer, and the first to the (n−1)th oxide superconducting layers as other oxide superconducting layers of the multilayer structure are made of an identical material, and (iv) edges of the other oxide superconducting layers and the first to the (n−1)th oxide insulating layers are a tapered surface reaching the insulating substrate, and the uppermost-level oxide superconducting layer is in direct contact with the tapered surface the other oxide superconducting layers and the first to the (n−1)th oxide insulating layers, and with an upper surface of the insulating substrate.