Light source unit, thermally assisted magnetic head, head gimbal assembly, and hard disk drive
US12406690B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2024 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Aug 16, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosure disclose a light source unit applied to the thermally assisted magnetic head. A welding layer and a stopping structure are disposed between the slider of the thermally assisted magnetic head and the light source unit. When the light source unit is joined with the slider, the light source unit moves as the welding layer melts and can be precisely limited at the preset position by the stopping structure. In this way, the emission opening of the light source unit and the waveguide can be aligned precisely, thereby increasing the optical coupling efficiency between the light source unit and the waveguide. Meanwhile, the embodiment of the disclosure further accordingly provides a thermally assisted magnetic head, a head gimbal assembly, and a hard disk drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.