| 摘要 |
PROBLEM TO BE SOLVED: 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. SOLUTION: 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. COPYRIGHT: (C)2007,JPO&INPIT |
