Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:F7
Session:
Number:F7-1
Study of Current Density Phenomenon on Scratched Media Magnetic Disk
Yutthasak Todtong, Apirat Siritaratiwat,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
In hard-disk drive industry, a media disk is one important part. It contains multilayer of various materials, i.e. magnetic, nonmagnetic, DLC etc [1]. In the production line, during a test performed, contamination or nano-particles can cause scratching on media disk. The size of scratch can be in a range of nanometer-millimeter. In this paper, a technique of current density applied to media disk is proposed in association with thermal observation. A constant current is applied to media disk and then a current density on detecting point is measured. A variation of bias current, detecting point and scratch depth is studied.