Magnetic write head having a shield that extends below the leading edge of the write pole
US7715147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2006 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Sep 9, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic write head for perpendicular magnetic recording that has a write pole and a trailing or side shield that has a leading edge that extends to or beyond the leading edge of write pole, thereby ensuring complete side magnetic shielding. The write head can be formed by forming the write pole on a non-magnetic substrate that is constructed of a material that can be readily removed by reactive ion etching (RIE). The write pole can be formed by depositing a layer of magnetic write pole material over the substrate and then forming a mask over the magnetic write pole material. An ion mill can be performed to define the write pole, and then a reactive ion etch can be performed to notch the substrate, so that when a non-magnetic shield gap material is deposited it will be below or at the bottom of the write pole. Then a magnetic shield material can be deposited to form a shield having a leading edge that extends beyond the leading edge of the write pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.