Title :
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
fDate :
1/1/1996 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
