Semiconductor laser for thermally-assisted magnetic recording head
US10566013B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 17, 2019 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Jan 17, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light source unit for thermally-assisted magnetic head includes a substrate member having a bonding surface, multiple layers formed on the bonding surface and comprising a base layer, a connection pad layer, an insulation layer and a bonding layer; a light source assembly attached on the bonding layer of the substrate member and having a laser diode embedded therein and connected to the connection pad layer on the bonding surface, so as to form a laser diode circuit; and a heater buried in the insulation layer and connected to the connection pad layer, so as to form a heater circuit. The light source unit can maintain stable heat power for facilitating performance of the thermally-assisted magnetic head, and further reduce the sizes of the light source unit and substrate member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.