Combined read/write magnetic head having MRE positioned between broken flux guide and non-magnetic substrate
US5905610A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1993 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Jun 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3967
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A combined read/write magnetic head is disclosed in which the read head includes a magnetoresistive element (MRE) overlying a substrate of substantially magnetically impermeable material, a broken (discontinuous) flux guide overlying the MRE and a continuous flux guide overlying the broken flux guide. The write head of the combined read/write magnetic head overlies the read head and shares the continuous flux guide with the read head, the continuous flux guide serving as a bottom pole of the write head. Significantly, the dimensions of the various elements of the combined read/write magnetic head are chosen so that relatively little magnetic flux produced by the write head during writing, or entering the write head during reading, is communicated via the shared flux guide to the MRE.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.