Methods and systems for fabricating high quality superconducting tapes

Patent metadata

Field	Value
Publication number	US-11410797-B2
Application number	US-201916727326-A
Country	US
Kind code	B2
Filing date	Dec 26, 2019
Priority date	Mar 15, 2013
Publication date	Aug 9, 2022
Grant date	Aug 9, 2022

Abstract

An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.

First claim

What is claimed is:

1. A method of fabricating a superconductor tape by metal organic chemical vapor deposition using a precursor to film conversion efficiency greater than approximately 20% of theoretical value, wherein the precursor to film conversion efficiency is a result of a conversion of precursor to film performed within a gap in a range from less than 1 mm to approximately ¼ inch, and wherein the gap is defined by an upper surface and a lower surface parallel to the upper surface.

2. The method of claim 1 , wherein the superconductor tape is a REBCO film.

3. The method of claim 2 , wherein the REBCO film comprises the formula REBa 2 Cu 3 O 7 .

4. The method of claim 1 , wherein the superconductor tape is substantially uniform.

5. The method of claim 1 , wherein the superconductor tape comprises no observable misoriented grain growth.

6. The method of claim 1 , wherein the superconductor tape comprises a film thickness greater than approximately 2 μm and a critical current density greater than approximately 4 MA/cm 2 at 77 K in a zero applied magnetic field.

7. The method of claim 6 , wherein the superconductor tape further comprises non c-axis grain orientation less than approximately 10%.

Assignees

• Univ Houston System

Inventors

• Majkic Goran
• Selvamanickam Venkat

Classifications

• H01B13/008

  for manufacturing extensible conductors or cables · CPC title

• C23C16/0209

  by heating · CPC title

• C23C16/448

  characterised by the method used for generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials · CPC title

• C23C16/545

  for coating elongated substrates · CPC title

• H01B12/06 Primary

  Films or wires on bases or cores · CPC title