Patent ID: 6507448
Filing Date: 2003-01-14
Classification: G11B

Abstract:
An information recording device in which magnetic fields are applied to small regions of a disk-like recording medium having magnetizations in small regions on a surface to invert the directions of magnetization of the small regions so as to record information on the recording medium, comprising:a magnetic head, arranged near or to be close to the recording medium, for applying magnetic fields to the small regions when the magnetic head relatively moves with respect to the recording medium to pass on the small regions of the recording medium; and a magnetic head controller for controlling the magnetic head to cause the magnetic head to apply magnetic fields to the small regions in a free region of the recording medium in a standby state in which at least information is not recorded on the recording medium to make the directions of magnetization of the small regions uniform so as to erase the information in the predetermined free region.