Magnetic head having a heating coil
US7593187B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2006 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Oct 31, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6011
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head is composed of a write head which magnetically records information by emitting magnetic flux, which is generated by a write coil, from a magnetic pole unit to a recording medium; and a read head having a reading element which converts record magnetic flux, which is emitted from the recording medium, to an electric signal. In a write coil facing area facing an area in which the thin-film coil pattern of the write coil is disposed, a heater coil which causes a medium facing surface to protrude toward a recording medium side by thermal expansion caused by power distribution and overheating is disposed via an insulating layer. In the heater coil, a wide terminal pattern is disposed outside the write coil facing area, and a heater pattern having a width narrower than the terminal pattern is disposed in the write coil facing area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.