| (19) |
 |
|
(11) |
EP 0 055 377 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
29.12.1982 Bulletin 1982/52 |
| (43) |
Date of publication A2: |
|
07.07.1982 Bulletin 1982/27 |
| (22) |
Date of filing: 29.10.1981 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
31.12.1980 US 221598
|
| (71) |
Applicant: International Business Machines Corporation |
|
() |
|
| (72) |
Inventors: |
|
- Blakeslee, Marybelle Capron
()
- Olsen, Judith Diane
()
- Romankiw, Lubomyr Taras
()
|
|
| |
|
| (54) |
Method of depositing nickel-iron-boron alloy magnetic films |
(57) Nickel-iron-boron alloy magnetic films containing from 0.1 to 2.0% boron by weight
and from 17 to 27% iron by weight are electrolytically deposited using a bath having
a pH of 2.5 or less, and containing a borane reducing agent. Thefilms have a high
resistance to corrosion and a coercivity less than 0.1 Oe in films 3000A thick.