Design and performance of a recessed thin film inductive transducer

Author

Zak, B.S. ; Curland, N. ; Giusti, J.H. ; Ash, K.P. ; Cameron, G.P.

Author_Institution

Seagate Technol., Bloomington, MN, USA

Volume

32

Issue

1

fYear

1996

fDate

1/1/1996 12:00:00 AM

Firstpage

74

Lastpage

79

Abstract

An improved inductive transducer is achieved by placing the coil and the majority of the transducer body into a recessed alumina basecoat. Process advantages of a recessed over planar structure includes lower top pole topography, improved pole trim capability, and improved top pole composition uniformity. Coil and photoresist processing in a recessed cavity allows for multiple layers with lower resistance without increasing transducer Permalloy path length. Recessed trimmed design performance has increased efficiency with higher amplitude and a narrower pulse width along with improved overwrite compared to planar untrimmed transducers. The recessed basecoat design is explained, and compared to planar transducers using modeling and performance results

Keywords

magnetic heads; magnetic sensors; magnetic thin film devices; Permalloy path length; coil; composition uniformity; design; efficiency; multiple layer; overwrite; photoresist processing; pulse width; recessed alumina basecoat; resistance; thin film inductive transducer; top pole topography; trim; Coils; Geometry; Magnetic heads; Magnetic separation; Resists; Scanning electron microscopy; Solid modeling; Surfaces; Transducers; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.477553

Filename

477553