Method for producing a magneto-optical recording medium
US5993616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/548
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention provides a method for producing a magneto-optical recording medium with a laminated film composed of a plurality of magnetic layers made of alloys of rare earth metals-transition metals such as a magneto-optical recording medium allowing direct overwriting through light intensity modulation and a magneto-optical recording medium allowing magnetically induced recording with super resolution, or a method for stably producing a magneto-optical recording medium excellent in performance. The method consists of using, as vaporizers to form the laminated magnetic film, three or more vaporizers including one or more vaporizers containing mainly rare earth elements and one or more vaporizers containing mainly transition metals. Then, particles ejected from a vaporizer containing mainly a rare earth metal and from two or more vaporizers containing mainly transition metals are allowed to continue to impinge onto the surface upon which the laminated film is to be formed, throughout the formation of the laminated film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.