磁性粉付着媒体又は磁性膜付着媒体検出装置

Title:

磁性粉付着媒体又は磁性膜付着媒体検出装置

Document Type and Number:

Japanese Patent JP4338090

Kind Code:

B2

Abstract:

To improve resolution by detecting a fine magnetic layer pattern, when detecting a medium to which magnetic powder is adhered and a medium to which a magnetic film is adhered, and to facilitate manufacture for reducing costs.

A magnetic filmed medium detector comprises at least a pair of spin-valve-type magnetoresistance effect elements R1, R2; and a permanent magnet 10 as a magnetic field generating means for applying a bias magnetic field to the spin-valve-type magnetoresistance effect elements R1, R2. Additionally, the pair of spin-valve-type magnetoresistance effect elements R1, R2 is arranged nearly vertical to the relative travel direction of the medium to which magnetic powder is adhered or the medium to which a magnetic film is adhered to be detected. Additionally, a bias magnetic field nearly vertical to the relative travel direction of the medium to which the magnetic powder is adhered or the medium to which the magnetic film is adhered is given to the spin-valve-type magnetoresistance effect elements R1, R2.

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Inventors:

Toshihisa Kido
Seiji Fukuoka
Kimiko Oi

Application Number:

JP2005085228A

Publication Date:

September 30, 2009

Filing Date:

March 24, 2005

Export Citation:

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