Thin-film magnetic head
US5253134A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1991 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | May 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin-film magnetic head comprising a substrate formed of a material having an electric resistivity of not higher than 150 ohm-cm and an electromagnetic transducer unit, the transducer unit is formed on the substrate and comprises a lower magnetic film directly attached to the substrate, a magnetic gap layer, a coil conductor layer, at least an insulating layer and an upper magnetic layer. The lower magnetic film is formed as a flat surface extending over the coil conductor layer, and parts, neighboring the magnetic gap region, of the end face directed to the recording medium are receded with the insulating layer being inorganic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.