Texturing apparatus for magnetic recording medium and magnetic r

Details Texturing apparatus for magnetic recording medium and magnetic r Texturing apparatus for magnetic recording medium and magnetic r

1995-12-14

1999-11-09

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

21912177, 428 653, 428694SG, B23K 2600, G11B 582

Patent

active

059819022

ABSTRACT:
A texturing apparatus for applying a texturing to a magnetic recording medium, such as a magnetic disk including a hard drive. A substrate such as a magnetic disk is held by a substrate rotating system, which is capable of rotating the substrate. A movable laser beam source including an electro-optic modulation circuit directs a laser beam through a focusing element onto the surface of the substrate. The modulation circuit allows the laser beam to pulse at a frequency from 0.1 to 100 MHz. The focusing element allows a laser beam spot diameter of 0.2 to 4 .mu.m on the surface of the substrate. This texturing includes texturing the magnetic head contact start and stop (CSS) area of hard disks.

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