Josephson junction array preparation method and structure based on superconducting bridge junction

An array structure, superconducting technology, applied in the manufacture/processing of superconducting devices, superconducting devices, superconducting components, etc., can solve problems such as difficulty in meeting, output voltage limitation, and limitation on the number of superconducting tunnel junctions

Pending Publication Date: 2020-10-30
NAT INST OF METROLOGY CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when highly integrated on a chip, the number of superconducting tunnel junctions is limited,

Method used

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  • Josephson junction array preparation method and structure based on superconducting bridge junction
  • Josephson junction array preparation method and structure based on superconducting bridge junction
  • Josephson junction array preparation method and structure based on superconducting bridge junction

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Embodiment Construction

[0049] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0051] It will be understood that when an element or layer is referred to as being "on," "adjacent," "con...

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Abstract

The invention relates to a Josephson junction array preparation method and structure based on a superconducting bridge junction. A plurality of first superconducting lead film substructures form a superconducting bridge junction array of a single-layer superconducting film through a plurality of nano bridges to obtain a Josephson junction array structure. The Josephson junction array structure isformed by the plurality of first superconducting lead film substructures, so that the size of a single layer of superconducting film can be regulated and controlled, and the period size of the junction with the minimum transverse size is reduced. Through the superconducting bridge junction array of a single layer of superconducting thin film, more layers can be stacked in sequence, and the numberof longitudinal layers is increased as much as possible. Compared with a traditional Josephson junction array chip of a sandwich structure, the Josephson junction array has the advantages that more Josephson junctions can be highly integrated on the same chip size, the number of junctions of one magnitude is increased, and the requirement of the market for output voltage is met. Moreover, under the condition that the quantity of Josephson junctions is the same, the size of the chip can be greatly reduced.

Description

technical field [0001] The present application relates to the technical field of electronic devices, in particular to a preparation method and structure of a Josephson junction array based on superconducting bridge junctions. Background technique [0002] A Josephson voltage reference is a metrological reference that reproduces voltage magnitudes based on the Josephson effect. Compared with the traditional physical reference based on the standard Weston saturated battery, the quantum voltage reference has the advantages of high precision, high reproducibility and easy storage. The core of the quantum voltage reference is a large-scale integrated Josephson junction chip. Among them, the magnitude of the quantum voltage is V=n f / KJ=n f h / 2e, and the recommended value of Josephson's constant given by the International Committee of Weights and Measures Electricity Advisory Committee is KJ=483597.9GHz / V, and h represents Plann Gram constant, e represents the electronic charge, ...

Claims

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Application Information

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IPC IPC(8): H01L39/24B82Y40/00H01L39/02H01L39/22
CPCB82Y40/00H10N60/805H10N60/12H10N60/0912
Inventor 钟青李劲劲钟源王雪深徐骁龙曹文会
Owner NAT INST OF METROLOGY CHINA
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