Method and device for manufacturing magnetic recording medium
US4450186A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Aug 19, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a method and a device for mass-producing a magnetic recording medium which has excellent wear and corrosion resistance and uniform quality along the longitudinal and transverse directions of an elongated base body, wherein the elongated base body in a vacuum chamber is fed to continuously deposit a ferromagnetic material thereon, while a gas is sprayed in the vicinity of an incident angle control section of a mask for controlling an angle of incidence of a vapor flow from a vapor source to the elongated base body. The angle of incidence is kept constant to prevent deposition of the vapor material on the incident angle control section, and simultaneously, a uniform oxide film is formed on the ferromagnetic layer using a gas containing oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.