Magnetoresistance effect head having a giant magnetoresistance effect film
US5999378A · kind A · utility
7Cited by
6References
7Claims
0Family size
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Key dates
| Filing date | Dec 1, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Dec 1, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetoresistance effect head comprises a giant magnetoresistance effect film, a pair of leads to supply an electric current to the giant magnetoresistance effect head, and upper and lower magnetic shielding layers made of a crystalline soft magnetic film and disposed to hold the giant magnetoresistance effect film therebetween with a magnetic gap film intervened, wherein the surface roughness of an under layer of the giant magnetoresistance effect film is determined so that a center period L of the surface roughness satisfies L>70 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.