# US 11,910,727 B2 · Ultra-thin film superconducting tapes

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,910,727 B2
- Document ID: US11910727B2
- Status: Granted
- Kind: B2
- Application number: 17/723,281
- Filed: 2022-04-18
- Published: 2022-08-04
- Granted: 2024-02-20
- Earliest claimed: 2015-05-11
- Assignees: University of Houston System
- Applicants: University of Houston System
- Inventors: Venkat Selvamanickam
- Web page: https://patentgrep.com/patent/US11910727B2

## CPC

- H10N 60/0801: {Manufacture or treatment of filaments or composite wires}
- H10N 60/0632: {Intermediate layers, e.g. for growth control}
- H10N 60/0661: {Processes performed after copper oxide formation, e.g. patterning}
- H10N 60/203: {comprising high-Tc ceramic materials}
- H10N 60/857: {comprising copper oxide}
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

An ultra-thin film superconducting tape and method for fabricating same is disclosed. Embodiments are directed to a superconducting tape being fabricated by processes which include removing a portion of the superconducting tape's substrate subsequent the substrate's initial formation, whereby a thickness of the superconducting tape is reduced to 15-80 μm.

## Claims

### Claim 1

A superconductor wire comprising:
a core having a diameter of at least 0.5 mm; and
a stack of superconductor tapes spiral wound around the core;
wherein the stack of superconductor tapes have an outside diameter between 0.7 mm and 3 mm while wound around the core, and
wherein at least one of the superconductor tapes has a thickness in a range of 15-23 μm and an engineering current density of above 800 A/mm2 at 77 K, 0 T.

### Claim 2 (depends on 1)

The superconductor wire of claim 1, wherein each superconductor tape within the stack of superconductor tapes comprises a superconductor layer comprising REBCO.

### Claim 3 (depends on 1)

The superconductor wire of claim 1, wherein each superconductor tape within the stack of superconductor tapes comprises a superconductor layer and an overlayer overlying the superconductor layer.

### Claim 4 (depends on 3)

The superconductor wire of claim 3, wherein each overlayer comprises silver (Ag) or gold (Au).

### Claim 5 (depends on 3)

The superconductor wire of claim 3, further comprising a stabilizer layer overlying each overlayer.

### Claim 6 (depends on 5)

The superconductor wire of claim 5, wherein each stabilizer layer comprises copper (Cu).

### Claim 7 (depends on 1)

The superconductor wire of claim 1, wherein the core comprises brass.

### Claim 8 (depends on 1)

The superconductor wire of claim 1, wherein the superconductor wire exhibits no degradation in critical current as compared to the superconductor wire prior to the stack of superconductor tapes being spiral wound around the core.