Magnetic recording medium having a magnetic layer with a specified vickers indentation hardness or plastic deformation
US5340635A · kind A · utility
8Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1992 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | May 22, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/256
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is disclosed. The medium has a Vickers hardness of said magnetic layer being within a range from 40 to 170, an amount of plastic deformation of said magnetic layer being in a range of 0.3-0.9 .mu.m, and satisfies the relation of (A+200 B).gtoreq.180 wherein A is the value of said Vickers hardness and B is plastic deformation. The magnetic recording medium of the invention provides no contamination of calender rolls caused in the course of manufacturing thereof, and has running stability which is not affected by environmental conditions and which reduces clogging on a magnetic head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.