Recording medium and recording device
AssigneeHitachi, Ltd.
InventorsSumio Hosaka, Hajime Koyanagi, Atsushi Kikukawa, Kenchi Ito, Kimitoshi Etoh
Life of this patent
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Abstract
A recording disk has a surface provided with guide grooves for controlling the position of a recording head, and recording bits formed in the guide grooves for high-density recording. The recording bits have the shape of a tadpole in a plane. The width Ws of the recording bits is greater than the width Wg of the guide grooves. An AFM probe serving as a recording head travels along the guide grooves without running off the guide grooves. When a tip part of the AFM probe coincides with the recording bit, the tip part drops deep into the guide groove, whereby the recording bit is detected.
Claims45
A recording disk having a surface provided with guide tracks formed at a track pitch less than 0.5 μm, and digital information recording parts formed in the guide grooves.
A recording medium comprising a medium having a surface provided with guide grooves for controlling the travel of a probe therein, and digital information recording parts formed in the guide grooves.
A recording medium comprising a disk having a surface provided with guide grooves for guiding a probe supported on a cantilever for traveling along the guide grooves, and digital information recording parts formed in the guide grooves;
- wherein a laser beam reflected by a back surface of the cantilever opposite a front surface of the same on which the probe is held is measured to determine a dislocation of the probe from the center of the guide groove to control the travel of the probe, a distance of shift of the probe in a direction perpendicular to the surface of the disk caused by each digital information recording part is measured to read the digital information parts.
A recording medium comprising a disk having a surface provided with guide grooves for guiding a probe, and digital information recording parts formed in the guide grooves;
- wherein the digital information recording parts causes the probe to shift in a direction perpendicular to the surface of the disk.
A recording medium comprising a disk having a surface provided with guide grooves of U- or V-shaped cross section for guiding a probe for traveling, and digital information recording parts formed in the guide grooves;
- wherein the guide grooves and the digital information recording parts differ from each other in width, a lateral force acting on the probe is detected to control the probe so as to be positioned on the center of the guide groove, and a distance of shift of the probe in a direction perpendicular to the surface of the disk caused by each digital information recording part is measured.
Dependencies are inferred from the claim text.