Double shielded magnetorestive sensing element
US3975772A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Jun 2, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3967
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetoresistive sensing element used for sensing magnetic transitions includes relatively thick shields and substantially thinner shields between the thick shields and the MR element. The output pulse waveform resulting from the MR element sensing a magnetic transition is improved permitting a higher linear density. The thick shields can comprise the legs of an inductive write transducer with the thin shields and MR element interposed for the read function. Another read/write head embodiment can include a separate write tranducer with the thin shields and the MR element placed between one of the legs of a write transducer and a third magnetic shield formed from either a thick magnetic layer or a magnetic substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.