Transducer with pole tip protrusion compensation layer
US7542246B1 · kind B1 · utility
160Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | May 1, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A transducer for a disk drive head includes a pole tip protrusion (PTP) compensation layer disposed proximate to a write element of the head to at least partially offset the effect of pole tip protrusion. The PTP compensation layer can be above, below, or within the write element. Suitable materials for the PTP compensation layer include zirconium oxide ceramics characterized by negative coefficients of thermal expansion such as ZrMo2O8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.