Magnetic head having layers of amorphous magnetic alloy bonded together with a glass containing vandium oxide phosphorus oxide and antimony oxide
US4794483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1986 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Oct 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1475
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head has a layer of amorphous magnetic alloy arranged to define a magnetic gap therebetween, the layer being bonded with a bonding glass having a viscosity of 10.sup.5 poises or less at a temperature by at least 50.degree. C. lower than the crystallization temperature of the amorphous magnetic alloy, a good water resistance after sintering and a low coefficient of thermal expansion such as 100.times.10.sup.-7 /.degree.C. or less. The bonding glass contains 55 to 70% by weight of V.sub.2 O.sub.5, 17 to 25% by weight of P.sub.2 O.sub.5, 3 to 20% by weight of Sb.sub.2 O.sub.3, 0 to 20% by weight of PbO, 0 to 15% by weight of Tl.sub.2 O, and 0 to 5% by weight of Nb.sub.2 O.sub.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.