(19) | |
| (11) | EP 0 323 003 A3 |
(12) | EUROPEAN PATENT APPLICATION |
(88) | Date of publication A3: | | 23.08.1989 Bulletin 1989/34 |
(43) | Date of publication A2: | | 05.07.1989 Bulletin 1989/27 |
(22) | Date of filing: 14.09.1988 |
| |
(84) | Designated Contracting States: | | DE FR GB IT NL |
(30) | Priority: | 23.12.1987 GB 8730062
|
(71) | Applicant: PLESSEY OVERSEAS LIMITED | | Ilford
Essex IG1 4AQ (GB) |
| (72) | Inventors: | | - Dorey, Lynn Yvette
Langlands
Northampton, NN3 3HD (GB) - Wort, Christopher John
Towcester
Northants NN12 8NY (GB)
|
(74) | Representative: Lupton, Frederick | | The Plessey Company plc
Intellectual Property Dept.
Vicarage Lane Ilford,
Essex IG1 4AQ Ilford,
Essex IG1 4AQ (GB) |
|
| |
(54) | Superconducting thin films |
(57) The invention relates to a method of protecting thin films of Y₁Ba₂Cu₃0
7-δ films from premature aging (resulting in a deterioration of superconducting properties) on atmospheric exposure, by applying a layer of silver which is impervious to water vapour but pervious to oxygen.