Magnetic head, head gimbal assembly, hard disk drive, and method for processing magnetic head
US12106786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2022 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | Nov 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure discloses a magnetic head, a head gimbal assembly, a hard disk drive, and a method for processing a magnetic head. The method comprises irradiating at a fixed point proximal to the read/write part with a laser irradiation device until the read head and the write head are thermally expanded; orientating air bearing surfaces of a plurality of magnetic heads forming a magnetic strip toward a lapping surface of a lapping device after laser irradiation, holding the air bearing surfaces in place, lapping with the lapping device until the air bearing surfaces are coplanar; and disassembling the magnetic strip to obtain a lapped magnetic head. Through laser heating induced compensation, the heights of lapped read head and write head of the magnetic head meet their respective target values, ensuring the normal reading and writing of the storage medium of the magnetic disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.