Magnetostrictive actuator in a magnetic head
US7385789B2 · kind B2 · utility
3Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2004 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | Jul 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to obtain improved magnetic track density, it is desirable to bring the read and write elements as close to the recording surface as possible, short of actually touching it. This has been achieved by utilizing a magnetostrictive actuator, comprising single or multiple pairs of magnetostrictive elements and their associated conductor coils. A magnetic field is generated by passing electrical current through the conductor coils. This field will saturate the actuator and cause the magnetostrictive elements to contract or expand, thus moving the read/write element whenever so desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.