Catastrophic damages on magnetic recording disks caused by slider-disk contacts during loading/unloading

Author

Shoda, M. ; Tani, H.

Author_Institution

Data Storage Syst. Div., Hitachi Ltd., Kanagawa, Japan

fYear

2002

fDate

27-29 Aug. 2002

Abstract

Catastrophic damages on a disk caused by impacts between slider and disk during loading/unloading were observed using an optical microscope and an optical surface analyzer (OSA). Flyability of a slider during loading/unloading was studied using an acoustic emission (AE) transducer. If many film-peelings of a disk are broken out by loading/unloading, film particles peeled from the disk can adhered to the air bearing surface of a slider. Ultimately, slider-disk contacts are caused in the recording zone. In order to reduce these film-peelings, broken out by loading/unloading, it is necessary to increase the scratch resistance of thin films of a disk.

Keywords

acoustic emission testing; hard discs; magnetic heads; magnetic recording; magnetic thin films; optical microscopy; AE transducers; OSA; acoustic emission transducers; air bearing surface adhering peeled film particles; disk film-peeling breakout; disk-runout; film-peeling reduction; loading/unloading slider-disk contact; magnetic recording disk catastrophic damage; optical microscopes; optical surface analyzers; recording zone slider disk impacts/contacts; slider flyability; thin film scratch resistance; Acoustic emission; Acoustic transducers; Disk recording; Magnetic analysis; Magnetic recording; Optical films; Optical microscopy; Optical recording; Stimulated emission; Surface resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetic Recording Conference, 2002. Digest of the Asia-Pacific

Conference_Location

Singapore

Print_ISBN

0-7803-7509-2

Type

conf

DOI

10.1109/APMRC.2002.1037646

Filename

1037646