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Thin Films Having Rock-Salt-Like Structure Deposited on Amorphous Surfaces


Stanford Reference:

97-161


Abstract


Stanford University scientists developed a patented ion beam deposition ("IBAD") technique to economically produce textured thin oxide films with rock-salt-like structure on amorphous substrates. Because rock salt structures tend to have a reasonable lattice match with films such as YBCO (yttrium barium copper oxide) and PZT (lead zirconium titanate), they are attractive for a variety of electronic and electrical applications. The process is particularly well-suited for the preparation of biaxially textured template layers for coated conductor type superconductors.

Patent Claim 1:
An article, comprising:

a substrate comprising a metal alloy, the substrate having at least one smooth amorphous surface, wherein the root mean square roughness of said smooth amorphous surface is less than about 100 angstroms; buffer layer comprising a first thin film formed on said amorphous surface of said substrate from a material having a rock-salt-like structure and substantial alignment both in-plane and out-of-plane; and

a second film having substantial alignment both in-plane and out-of-plane formed on a surface of said buffer layer, wherein said first film provides a template for the epitaxial growth of said second film.


Applications


  • Coated conductor superconductors
  • Generators
  • High power transmission lines
  • Motors
  • Transformers

Advantages


  • Economical - films on amorphous substrates are less expensive than:
    • single crystal forms of rock salt-like structures
    • epitaxially grown films which must be produced upon substrates which themselves exhibit biaxially textured surface

Publications



Innovators & Portfolio


  • Khiem Do   
  • Theodore Geballe   
  • Robert Hammond   
  • Connie Wang   

Patent Status



Date Released

 9/28/2012
 

Licensing Contact


Irit Gal, Senior Licensing Associate
650-723-1586 (Business)
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Related Keywords


general engineering   energy: high-power   materials: superconductor   materials: composite   
 

   

  

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