Magnetic recording medium
US4701374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1985 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Jul 1, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium obtained by forming a Si-N-O system film on a magnetic recording layer with perpendicular axis of easy magnetization. The magnetic recording layer is a metallic magnetic film such as Co-Cr system alloy film. The oxygen content in the Si-N-O system film is selected preferably to show a maximum absorption of infrared radiation in the range above 830 cm.sup.-1 and below 1100 cm.sup.-1 of 1/.lambda. (.lambda. is the wavelength of the infrared radiation). Through formation of the Si-N-O system film, the magnetic recording medium can satisfy simultaneously both of the durability and the perpendicular magnetic recording characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.