Method and system for providing enhanced thermal expansion for hard disk drives
US8670214B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Dec 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system provide a magnetic read and/or write transducer for use in disk drive. A read transducer has an air-bearing surface (ABS) and includes a read sensor, a nonmagnetic gap, a heater, and an expander. The nonmagnetic gap is adjacent to a portion of the read sensor and has a first coefficient of thermal expansion (CTE). The heater heats a portion of the magnetic read transducer. The expander is adjacent to a portion of the nonmagnetic gap and has a second CTE greater than the first CTE. The write transducer includes a pole, a coil, an insulator adjacent to and for insulating the coil, a heater and an expander. The expander has a CTE greater than the insulator's CTE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.