Patent ID: 6333840
Filing Date: 2001-12-25
Classification: B82Y,G11B

Abstract:
A magnetic recording apparatus, comprising:a magnetic recording medium having a plurality of recording bits;a magnetoresistance head configured to detect a signal magnetic field from the magnetic recording medium, the magnetoresistance head including a magnetic field detecting film, and upper and lower magnetic shielding films provided above and below the magnetic field detecting film through upper and lower magnetic gap films, a distance from a film thickness center of the magnetic field detecting film to the upper magnetic shielding film being different from a distance from the film thickness center to the lower magnetic shielding film;a signal processing circuit configured to process a signal from the magnetoresistance head, the signal processing circuit obtaining a reproduction signal of a present bit by subtracting a correction value obtained by multiplying a signal value of a previous bit identified prior to the present bit by a predetermined coefficient from a signal value of the present bit; andwherein the distance from film thickness center of the magnetic field detecting film to one of the upper and lower magnetic shielding films is not less than twice the distance from film thickness center of the magnetic field detecting film to another of the upper and lower magnetic shielding films, and the distance from film thickness center of the magnetic field detecting film to the another of the upper and lower magnetic shielding films is less than the distance from magnetic recording medium facing surface of the magnetic field detecting film to the surface of recording layer of the magnetic recording medium.