C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/103, 204/96.
C23C 14/34 (2006.01) H01L 39/24 (2006.01)
Patent
CA 1309904
- 14 - METHOD OF PRODUCING A SUPERCONDUCTIVE OXIDE LAYER ON A SUBSTRATE Abstract A method of forming a superconductive metal oxide film on a substrate is disclosed. The method comprises depositing a metal layer on the substrate and heat treating the metal layer in an oxygen-containing atmosphere such that the oxide film is formed therefrom. The metal layer is deposited such that it is substantially free of reactive constituents, e.g., oxygen and/or fluorine, and such that it contains all the metal constituents that are to be contained in the oxide film. Advantageously, the metal layer is deposited such that the various metal constituents (e.g., Y, Ba, and Cu) are substantially mixed. The inventive method simplifies deposition control since the densities of the metal deposits are well known and constant, and permits relatively rapid deposition (e.g., by DC sputtering) since the targets are not subject to oxidation. A multi-stage heat treatment process, with patterning of the oxide layer carried out at an intermediate stage of the process, that can result in improved pattern definition and can avoid deterioration of the oxide film as a consequence of the patterning, is also disclosed. Patterning of the metal layer prior to oxidation thereof is also contemplated.
575500
Fiory Anthony Thomas
Gurvitch Michael
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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