System and method for minimizing thermal pole tip protrusion
US7035046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | May 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An enhanced recording head design provides thermal diffusion and thermal expansion control in order to minimize the pole tip protrusion resulting from the thermal heating of the magnetic recording head during operation. In one embodiment, the recording head a thermal restraint section formed above a write section, and is made of a 60–80% face-centered-cubic NiFe (Invar) material. According to another embodiment, the thermal restraint section is formed under the read section. According to yet another embodiment, one thermal restraint section is formed above the write section, and another thermal restraint section formed under the read section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.