# US 12,113,123 B2 · Superconducting materials, devices, and processes

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- Number: US 12,113,123 B2
- Document ID: US12113123B2
- Status: Granted
- Kind: B2
- Application number: 18/070,765
- Filed: 2022-11-29
- Published: 2023-04-20
- Granted: 2024-10-08
- Earliest claimed: 2019-09-04
- Assignees: The Board of Trustees of Western Michigan University
- Applicants: The Board of Trustees of Western Michigan University
- Inventors: Robert A. Makin, III; Steven Michael Durbin
- Web page: https://patentgrep.com/patent/US12113123B2

## CPC

- H10D 30/051: {of FETs having PN junction gates (H10D30/015 takes precedence)}
- H10P 74/23: {characterised by multiple measurements, corrections, marking or sorting processes}
- H10N 60/01: Manufacture or treatment
- H10N 60/0912: {of Josephson-effect devices}
- H10N 60/12: Josephson-effect devices
- H10P 74/207: {Electrical properties, e.g. testing or measuring of resistance, deep levels or capacitance-voltage characteristics}
- H10D 10/80: Heterojunction BJTs
- H10P 74/203: {Structural properties, e.g. testing or measuring thicknesses, line widths, warpage, bond strengths or physical defects}
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A method of fabricating a superconducting device includes determining a target transition temperature and utilizing a predefined quantitative relationship between superconducting transition temperature and an order parameter for at least one superconducting material composition is utilized to select a superconductor material composition that is capable of providing a target transition temperature. Process parameters may be controlled to form a superconductor device comprising at least one superconductor material having a material composition providing the target transition temperature.

## Claims

### Claim 1

A method of fabricating a superconducting device, the method comprising:
determining a target transition temperature;
utilizing a predefined quantitative relationship between superconducting transition temperature and an order parameter (S) for at least one superconductor material composition to select a superconductor material composition that is capable of providing the target transition temperature, wherein the quantitative relationship can be expressed as a linear relationship between superconducting transition temperature and order parameter square (S2); and
controlling process parameters to form a superconductor device comprising at least one superconductor material having the selected superconductor material composition and the target transition temperature.

### Claim 2 (depends on 1)

The method of claim 1, wherein:
the superconductor device comprises a superconducting quantum interference device (SQUID).

### Claim 3 (depends on 1)

The method of claim 1, wherein:
the superconductor device comprises a bolometer.

### Claim 4 (depends on 1)

The method of claim 1, wherein the superconductor device comprises a superconducting electrical connection.

### Claim 5

A method of fabricating a superconducting device, the method comprising:
determining a target transition temperature;
determining an order parameter (S) for a selected superconducting material based on a predefined numerical relationship between a superconducting transition temperature and S for the selected superconductor material, wherein the numerical relationship between superconducting transition temperature and S for the selected superconductor material is fully predictive of superconducting transition temperature as a function of S; and
controlling process parameters to form a superconducting device comprising the selected superconductor material having the target transition temperature; wherein
the numerical relationship can be expressed as a linear relationship between superconducting transition temperature and order parameter squared S2.

### Claim 6 (depends on 5)

The method of claim 5, wherein:
the superconductor device comprises a superconducting quantum interference device (SQUID).

### Claim 7 (depends on 5)

The method of claim 5, wherein:
the superconductor device comprises a bolometer.

### Claim 8 (depends on 5)

The method of claim 5, wherein the superconductor device comprises a superconducting electrical connection.