Near-field optical head and manufacturing method thereof and optical recording/readout system using near-field optical head
US6304527A · kind A · utility
32Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Mar 15, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/862
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pad for controlling the state of contact or flying of a slider with or to an information-recording medium and a probe for exciting near-field light having a small spot size are mounted on the slider and the pad is near to the probe. Semiconductor laser light focused by an objective lens is converted into near-field light having a small spot size near the top of the probe for exciting near-field light. The slider travels at a height of several tens nm to a recording medium substrate and information is recorded or read out on or from the information-recording medium formed on the recording medium substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.