Thin film magnetic head with layer having high saturation magnetic flux density, and magnetic storage apparatus
US7679860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2006 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Apr 26, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1186
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention provide a magnetic film capable of providing a higher saturation magnetic flux density as compared with the conventional one, a process of forming the magnetic film, a thin film magnetic head that makes use of the magnetic film, and a magnetic disk drive having this thin film magnetic head. In one embodiment, a magnetic film contains Co, Ni, and Fe, and its composition is such that 10≦Co<20 wt %, 0≦Ni≦2 wt %, and 80<Fe≦90 wt %. This magnetic film is a plating layer formed by electroplating. The face interval variation of crystal surface perpendicular to the layer surface relative to a crystal surface parallel to the layer surface is about 0.4% or more, whereby the saturation magnetic flux density (Bs) is greater than about 2.4 T.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.