Patent ID: 7336448
Filing Date: 2008-02-26
Classification: G11B

Abstract:
1. A magnetic disk device comprising: a magnetic disk in which a data zone is formed; an actuator having a voice coil and a head slider carrying a magnetic head, the actuator being swung to move the magnetic head over the disk between an innermost position of the data zone and an outermost position of the data zone wherein the voice coil includes first and second side section coils; and a magnet having a magnetization center and opposed to the voice coil so that a voice coil motor which swings the actuator is formed, the magnet having a north pole and a south pole confronting each other via the magnetization center, wherein the magnetic disk device is provided so that a deviation between the magnetization center and one of the first and second side section coils nearer to the magnetization center when the magnetic head is in the innermost position of the data zone is made equal to a deviation between the magnetization center and the other of the first and second side section coils nearer to the magnetization center when the magnetic head is in the outermost position of the data zone.