The effects of pole geometry on recording performance of narrow track thin film heads

Author

Cain, William C. ; Thayamballi, P.K. ; Vea, Mathew P.

Author_Institution

Read-Rite Corp., Milpitas, CA, USA

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

275

Lastpage

280

Abstract

The effects of pole trimming on the recording performance of thin film heads is investigated through experiment and modeling. Three dimensional head fields are computed numerically for various pole geometries, and are used by a simple two dimensional recording simulation to determine written width, erase width, read width and isolated pulse response. These parameters are then compared to experimental values measured on trimmed and untrimmed heads. Both modeled and experimental parameters are then used as input to a system error rate simulation to determine the effects of pole trimming on system error rate as a function of track density. Good agreement is found between model and experimental parameters. The error rate results suggest that in a system with a reasonable track misregistration (TMR), a track density increase of 7 to 9% can be obtained by trimming the inductive head poles

Keywords

error analysis; magnetic heads; magnetic recording; magnetic thin film devices; 3D head fields; disk drive system; erase width; error rate simulation; inductive head poles; isolated pulse response; modeling; narrow track thin film heads; numerical computation; pole geometry; pole trimming; read width; recording performance; track density; track misregistration; two dimensional recording simulation; written width; Coercive force; Computational modeling; Disk recording; Error analysis; Geometry; Magnetic heads; Predictive models; Solid modeling; Space vector pulse width modulation; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312272

Filename

312272