Microwave assisted magnetic recording head slider and lapping method thereof
US11308981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2021 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Jun 8, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lapping method of a MAMR head slider includes a first lapping process: controlling the lapping plate to spin at a first speed, and controlling the MAMR head slider to move at a first moving speed, and applying a first force to the MAMR head slider; and a second lapping process: controlling the lapping plate to spin at a second speed that is lower than the first speed, and controlling the MAMR head slider to move at a second moving speed that is lower than the first moving speed, and applying a second force that is lower than the first force to the MAMR head slider; and the second lapping process includes a final lapping process section, and the second force in the final lapping process being zero. In such a way, lapping marks on the ABS are reduced to improve the roughness and the reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.