Bump characterization with MR/GMR head as transducer

Author

Leng, Qingfang ; Liu, Bo ; Zhang, Wei ; Mydeen, Abusalih S. ; Hu, Shengbin

Author_Institution

Data Storage Inst., Singapore

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2671

Lastpage

2673

Abstract

With a magneto-resistive (MR) head as transducer, this paper report a method and experimental results of fast in-situ characterization of laser textured bumps over disk surface. The thermally induced change of the resistance of MR head is used to conduct fast analysis of the uniformity of bump width, bump pitch interval, and bump height in the laser textured landing zone of a magnetic disk. Two modes of the tester setup are discussed. One mode is for the fast detection of the above mentioned uniformity within one disk revolution. Another mode is for mapping the selected bumps or all the bumps in a selected sector or a sub-zone of the textured landing zone. The setup can be used in both on-line and off-line analysis of the laser bump uniformity in media manufacturing process

Keywords

giant magnetoresistance; magnetic heads; magnetoresistive devices; electric resistance; flying height; giant magnetostrictive head; head-disk interface; landing zone; laser textured bump; magnetic hard disk drive; magnetoresistive head; thermal asperity; transducer; Laser modes; Laser transitions; Magnetic analysis; Magnetic heads; Surface emitting lasers; Surface resistance; Surface texture; Thermal conductivity; Thermal resistance; Transducers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908554

Filename

908554