Thin-film perpendicular magnetic recording and reproducing head having thin magnetic shield film on side surfaces
US5181151A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 16, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Apr 16, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1278
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin-film perpendicular magnetic recording and reproducing head including a magnetic member defining a return path and having a narrow groove formed in one of its principal surfaces in parallel to a sliding surface adapted to face a magnetic recording medium, a non-magnetic material filling the groove, and a multilayer film assembly formed above the groove and consisting at least of a thin-film conductor coil, an interlayer insulating film, a thick main pole film, a main pole film and a protective film formed one upon another. The magnetic member is connected to the main pole film through a via hole portion, and is exposed on the sliding surface in the vicinity of the main pole film so as to face the recording medium. A thin magnetic film serving as a magnetic shield covers the protective film and the sidewall surface of the head and is joined to the sidewall surface of the magnetic member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.