US5372992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superconducting thin film
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1994-01-03
•
Granted: 1994-12-13
•
Expires: 2014-01-03
Abstract
Abstract A superconducting thin film of a compound oxide represented by YBa2Cu3Oy in which "y" is a number of 6<y<8 and deposited on a substrate, characterized in that a buffer layer of a compound oxide represented by Y2BaCuOx in which "x" is a number of 4<x<6 is interposed between the superconducting thin film and the substrate.
Inventors
- 👤 Hideo Itozaki
- 👤 Kenjiro Higaki
- 👤 Shuji Yazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:06
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0576; H10N60/0632; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A superconducting thin film of a compound oxide represented by YBa 2 Cu 3 O y , in which "y" is a number in the range of 6<y<8 and deposited on a single crystal substrate, wherein a thin film buffer layer of a compound oxide represented by Y 2 BaCuO x , in which "x" is a number in the range of 4<x<6, is interposed between said superconducting thin film and said substrate, wherein said buffer layer has a thickness greater than 100 Å and wherein said substrate is made of an oxide selected from the group consisting of ZrO 2 , MgO, SrTiO 3 , yttrium stabilized zirconia (YSZ), LaGaO 3 , NdGaO 3 and LaAlO 3 , and wherein said substrate is a single crystal substrate of oxide, and wherein said buffer layer is deposited on {100} plane or (110} plane of said substrate.
Claim 2
Dependent Claim
146 words
A superconducting thin film of a compound oxide represented by YBa 2 Cu 3 O y , in which "y" is a number in the range of 6<y<8 and deposited on a single crystal substrate, wherein a thin film buffer layer of a compound oxide represented by Y 2 BaCuO x , in which "x" is a number in the range of 4<x<6, is interposed between said superconducting thin film and said substrate, wherein said buffer layer has a thickness greater than 100 Å and wherein said substrate is made of an oxide selected from the group consisting of ZrO 2 , MgO, SrTiO 3 , yttrium stabilized zirconia (YSZ), LaGaO 3 , NdGaO 3 and LaAlO 3 , and wherein said substrate is a single crystal substrate of oxide, and wherein said buffer layer is deposited on {100} plane or (110} plane of said substrate.
Claim 3
Dependent Claim
17 words
The superconducting thin film set forth in claim 1 wherein said buffer layer is prepared by sputtering.
Claim 4
Dependent Claim
32 words
The superconducting thin film set forth in claim 1 wherein said substrate is made from an oxide selected from the group consisting of LaGaO 3 , NdGaO 3 and LaAlO 3 .
References Cited (Backward Citations)
EP0301646A1
Cited
US4948779A
Cited
EP0306287A2
Cited
WO1989008335A1
Cited
EP0400524A2
Cited
US5024898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |