Seek durability for CoCrTa perpendicular flexible disks

Author

Tagami, Katsumichi ; Takeda, Takayuki ; Arai, Toyoko ; Hayashida, Hiroshi

Author_Institution

NEC Corp., Kawasaki, Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2694

Lastpage

2696

Abstract

The seek durability of CoCrTa perpendicular flexible disks was studied using a conventional 3.5-in double-sided flexible disk drive. The seek durability strongly depends on the CoCrTa film preparation conditions. The durability is increased by adding a Si underlayer for a CoCrTa film. Disk media yield pressures were evaluated with a scratch test using a sapphire needle. It is shown that high media yield pressure leads to a high seek durability. Ta addition to CoCr film increases the media yield pressure. The number of seek operations achieved was 200×10⁴, using the following disk construction: protective layer/CoCrTa film/Si underlayer/base film

Keywords

chromium alloys; cobalt alloys; floppy discs; hardness; tantalum alloys; yield strength; 3.5 inch; CoCrTa perpendicular flexible disks; Si underlayer; sapphire needle; scratch test; seek durability; yield pressures; Disk drives; Disk recording; Magnetic films; Magnetic heads; Needles; Perpendicular magnetic recording; Polyimides; Protection; Semiconductor films; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104841

Filename

104841