Method for forming optical aperture, near-field optical head, method for fabricating near-field optical head, and information recording/reading apparatus
US7032427B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2001 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Oct 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/1058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method of producing an optical aperture, there is provided an object having a substrate, at least one conical- or pyramidal-shaped tip disposed on the substrate, at least one stopper disposed on the substrate in the vicinity of the tip and having a height substantially equal to a height of the tip, and an opaque film disposed at least on the tip. A pressing body is disposed relative to the object so that a surface of the pressing body is disposed over the tip and at least a portion of the stopper. The pressing body is then displaced to bring the surface of the pressing body into contact with the object so that a force component is directed to a front end of the tip to form an optical aperture at the front end of the tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.