Electroplating of high damping material for trailing shield in a perpendicular magnetic recording writer
US11978488B1 · kind B1 · utility
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9Claims
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Key dates
| Filing date | Apr 11, 2023 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Apr 11, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present embodiments relate to a PMR write head with a trailing shield that comprises a FeCoNiM composition. The FeCoNiM composition can be formed via an electroplating process by adding Fe2+, Co2+, Ni2+ and a transition metal salt to an aqueous solution comprised of other additives in an electroplating cell that has an Ni or Co as the anode. The plated HD magnetic material as the trailing shield in a PMR writer can minimize a wide area track erasure (WATE). Further, a high moment high damping shield can lower bit error rate (BER) and increase aerial density capability (ADC) of the write head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.