Title :
Observation of scratch on magnetic media by, using thermal infrared camera
Author :
Todtong, Y. ; Suwannafa, N. ; Rakpongsiri, P. ; Sompongse, D. ; Siritaratiwat, A.
Author_Institution :
Dept. of Electr. Eng., Khon Kaen Univ., Khon Kaen
Abstract :
Decreasing of distance between head and magnetic disk, due to higher data storage density requirement, often causes scratches on the magnetic media. In order to scratch failure improvement, a practical technique for measuring or monitoring scratch on media in manufacturing is in demand. In this paper, a technique of media scratched detection by using thermal infrared camera is proposed. It is found that, in order to visibly detect a micrometer-size of scratch, the thermal infrared camera must be taken at right angle to the media and a shorter time of current biasing shows a better result on scratch detection.
Keywords :
infrared imaging; magnetic disc storage; data storage density; magnetic disk; magnetic media; media scratched detection; micrometer-size scratch; scratch failure; scratch monitoring; thermal infrared camera; Cameras; Hard disks; Heat-assisted magnetic recording; Infrared detectors; Infrared heating; Magnetic heads; Magnetic materials; Manufacturing; Memory; Temperature; magnetic disk; media and thermal infrared camera; scratch detection;
Conference_Titel :
Magnetic Recording Conference, 2009. APMRC '09. Asia-Pacific
Conference_Location :
Singapore
Print_ISBN :
978-9810-82191-3
DOI :
10.1109/APMRC.2009.4925369