Hybrid diffuser for minimizing thermal pole tip protrusion and reader sensor temperature
US6859343B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2002 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | May 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/193
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An enchance recording head design provides conduction and mechanical restraint control in order to minimize the pole tip protrusion and the head temperature resulting from the thermal heating of the magnetic recording head during operation. In one embodiment, the recording head includes a hybrid diffuser formed within an insulation layer, at a predetermined distance from the head write section. The hybrid diffuser is comprised of a thermal conduction layer with high thermal conductivity, such as gold or copper, and a mechanical restraint layer having near zero CTE, such as a 60-80% face-centered-cubic NiFe (Invar) material. The hybrid diffuser is recessed from the ABS to prevent the delamination of the hybrid diffuser due to the otherwise displacement incompatibility between the inner insulating layer and the hybrid diffuser at the ABS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.