Near field optical head and information recording and reproducing device
US8050170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Oct 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A near field optical head includes: a slider provided so as to float from a surface of the magnetic recording medium by a predetermined distance, the slider having a facing surface faced to a surface of the magnetic recording medium; a tipped-shaped near field light generating element formed on the facing surface to have a bottom surface in contact with the facing surface, a top surface formed into a flat surface by cutting a top end of a cone or a pyramid, the flat surface being at a predetermined angle with the bottom surface, and a side surface connecting the bottom surface with the top surface for generating near field light from the top surface; a magnetic pole part formed from a main magnetic pole formed on the side surface and an auxiliary magnetic pole facing the main magnetic pole; a thin film-shaped magnetic circuit connected to the magnetic pole part; and a coil wound around the magnetic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.