首页>
外国专利>
APPARATUS FOR RECORDING AND READING CLOCK SIGNAL WHILE SECURING GAP BETWEEN CLOCK HEAD AND DISK FOR PREVENTING DAMAGE OF CLOCK HEAD AND DISK, METHOD THEREFOR, DISK HAVING STRUCTURE THEREFOR
APPARATUS FOR RECORDING AND READING CLOCK SIGNAL WHILE SECURING GAP BETWEEN CLOCK HEAD AND DISK FOR PREVENTING DAMAGE OF CLOCK HEAD AND DISK, METHOD THEREFOR, DISK HAVING STRUCTURE THEREFOR
PURPOSE: An apparatus for recording or reading a clock signal while securing a gap between a clock head and a disk for preventing damage of the clock head and the disk, a method therefor, a disk having a structure therefor are provided to improve the quality of servo information. CONSTITUTION: An aluminum substrate is coated with chromium to form a magnetized layer. A magnetic layer is formed on the chromium layer by applying Fe-Ni. A carbon layer is coated on the magnetic layer to protect the magnetic layer. A lubricant layer is coated on the carbon layer. A material(42) changing quantity of reflected light by irradiation of a laser beam is placed at a predetermined position for recording a servo reference clock signal.
展开▼
