Magnetic recording medium and production method thereof
US6207252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1998 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Jun 24, 2018 |
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 formed on a non-magnetic support and a magnetic layer containing a binder and a ferromagnetic powder and having a thickness of 0.7 .mu.m or thinner is formed on the non-magnetic support wherein the surface roughness Ra of the surface of the medium is from 0.5 to 7 nm and the skewness R.sub.SK of the surface of the medium is 0.1 or lower. The magnetic recording medium preferably has a nonmagnetic underlayer containing a binder and non-magnetic particles such as carbon black, between the non-magnetic support and the magnetic layer. The magnetic recording medium has excellent electromagnetic recording characteristics and torque characteristics and is suitable for high-density recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.