Floating magnetic head
US5347412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1993 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Mar 31, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3106
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A floating magnetic head including a non-magnetic substrate having a two-phase structure which substrate is used as a slider so as to enable a coefficient of thermal expansion to be controlled over a wide range. In air bearing surface is made to be properly rough to improve CSS characteristics of a floating magnetic head. A non-magnetic substrate material contains MnO, NiO, as main components, and Al.sub.2 O.sub.3, as a sub composition, or a part of the sub component is replaced by at least one substance selected from a group consisting of CaO, Y.sub.2 O .sub.3, ZrO .sub.3, ZnO, SrO. The non-magnetic substrate material has a two-phase structure including a rock salt type structure of (MnO, NiO) and a spinel structure of (MnO, NiO) Al.sub.2 O.sub.3 or (MnO, NiO) Al.sub.2 O.sub.3 containing at least one substance selected from a group consisting of CaO, Y.sub.2 O.sub.3, ZrO.sub.3, ZnO, SrO. An average grain size of the substrate is from 5 to 15 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.