| (19) |
 |
|
(11) |
EP 0 098 343 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
23.01.1985 Bulletin 1985/04 |
| (43) |
Date of publication A2: |
|
18.01.1984 Bulletin 1984/03 |
| (22) |
Date of filing: 23.02.1983 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
29.06.1982 US 393255
|
| (71) |
Applicant: International Business Machines Corporation |
|
() |
|
|
| |
|
| (54) |
Laser annealing of metallic alloy substrates |
(57) A smooth homogeneous surface is provided on an aluminium alloy disk substrate by
rotating the substrate, heating the rotating substrate with a laser beam to melt a
portion of the upper surface, including any second phase defects, and polishing the
melted surface after it has solidified.