Method for forming continuous oxide superconducting layer having difference thickness portions for superconducting device
First Claim
1. A process for manufacturing a Josephson junction superconducting device which includes a metal barrier layer sandwiched between a pair of oxide superconductor thin films layers, said process comprising the steps of:
- depositing a first oxide superconductor thin film layer over a surface of a substrate;
depositing a first metal layer over a surface of the first oxide superconductor thin film layer;
depositing a second oxide superconductor thin film layer over a surface of the first metal layer;
depositing a second metal layer over a surface of the second oxide superconducting thin film layer;
forming a resist pattern on a surface of the second metal layer wherein a portion of the second metal layer is covered with said resist;
removing an exposed portion of said second metal layer such that said covered portion of the second metal layer forms a first electrode;
forming a resist pattern over a portion of a surface of the second oxide superconductor thin film layer wherein said resist layer completely covers said first electrode and leaves a portion of the second oxide superconductor thin film layer exposed;
forming a Josephson junction by removing the portion of the second oxide superconductor thin film layer that is exposed and not covered by said resist pattern, a portion of the first metal layer, and a portion of the first oxide superconductor thin film layer; and
forming a second electrode on an exposed portion of the first oxide superconductor thin film layer.
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Accused Products
Abstract
A method for forming an oxide superconductor thin film having different thickness portions, in a process for manufacturing a superconductor device, includes the step of forming an oxide superconductor thin film having a uniform thickness on a substrates. A portion of the oxide superconductor thin film is etch-removed so that the oxide superconductor thin film has a thin thickness portion. Preferably, before the etching, the oxide superconductor thin film is coated with a metal layer, and the oxide superconductor thin film and the metal layer are etched together by means of a physical dry etching process.
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Citations
4 Claims
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1. A process for manufacturing a Josephson junction superconducting device which includes a metal barrier layer sandwiched between a pair of oxide superconductor thin films layers, said process comprising the steps of:
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depositing a first oxide superconductor thin film layer over a surface of a substrate; depositing a first metal layer over a surface of the first oxide superconductor thin film layer; depositing a second oxide superconductor thin film layer over a surface of the first metal layer; depositing a second metal layer over a surface of the second oxide superconducting thin film layer; forming a resist pattern on a surface of the second metal layer wherein a portion of the second metal layer is covered with said resist; removing an exposed portion of said second metal layer such that said covered portion of the second metal layer forms a first electrode; forming a resist pattern over a portion of a surface of the second oxide superconductor thin film layer wherein said resist layer completely covers said first electrode and leaves a portion of the second oxide superconductor thin film layer exposed; forming a Josephson junction by removing the portion of the second oxide superconductor thin film layer that is exposed and not covered by said resist pattern, a portion of the first metal layer, and a portion of the first oxide superconductor thin film layer; and forming a second electrode on an exposed portion of the first oxide superconductor thin film layer. - View Dependent Claims (2, 3, 4)
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Specification