Rewritable storage apparatus using first and second bias magnetic fields
US5590096A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The speed of a write operation in an optical magnetic disk unit is improved by effectively setting the bias magnetic field. When new data is written in an area on a medium, a bias control method for a rewritable storage apparatus which records data by applying a bias magnetic field for data recording and erases recorded data by applying a bias magnetic field for data erasing, applies the bias magnetic field for data erasing to the area to perform an erase operation; applies the bias magnetic field for writing to the area to perform a record operation to record the new data; and applies and maintains the bias magnetic field for data erasing to the medium directly after the record operation is finished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.