Magnetic recording medium
US4801500A · kind A · utility
9Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Dec 16, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a thin ferromagnetic metal film, wherein the thin ferromagnetic metal film contains an iron atom, a nitrogen atom and an oxygen atom within the following atomic percent ranges: EQU 57.ltoreq.a.ltoreq.90 EQU 2.ltoreq.b.ltoreq.20 EQU 5.ltoreq.c.ltoreq.23 EQU b+c<25 in which a, b and c represent the percentage of iron atom, nitrogen atom and oxygen atom, respectively, based on the total of these atoms in the thin ferromagnetic metal film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.