System of manufacturing magnetic recording media
US4511594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1983 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Jan 18, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system of manufacturing a magnetic recording medium in which a magnetic metal or alloy is heated and evaporated by an electron beam gun so that vacuum-evaporated magnetic film is formed on a non-organic or organic macromolecular base. A plasma generating coil is disposed near an evaporating source and an electron beam passes through the hollow portion of the coil in preferably a direction coaxial with the axis of the coil. High frequency power is applied to the coil and vacuum deposition is carried out with a plasma generated thereby. The flow of vapor of magnetic metal or alloy is applied obliquely to the base and an oxidation gas is introduced into a vacuum container for forming the magnetic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.