Disk apparatus using ferroelectric thin film
US5946284A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Aug 1, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B13/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a disk apparatus using a ferroelectric thin film coated on the surface of a disk as a recording medium, an electrode layer is formed on a substrate and the ferroelectric thin film is formed on the electrode layer, thereby forming a disk. A head is installed on an arm over the disk. The head has a reflector, and a microtip electrode, for creating or erasing polarization of the ferroelectric thin film. An optical system is provided over the head. The head moves towards or away from the disk depending on recorded information (polarization direction), and the movement is read by the optical system. Therefore, a low-priced disk apparatus, capable of freely recording and reproducing information semipermanently, is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.