Method of making a transducer with improved inductive coupling
First Claim
1. A process for fabricating a thin film magnetic transducer in a plurality of layers and that includes a coil having a plurality of turns, comprisingforming a yoke that includes at least one arm having segments respectively lying in separate said layers,disposing at least one of said segments generally along a longitudinal axis of said transducer and providing said segment with an easy axis of magnetization oriented transverse to a direction of flux conduction through said segment and at an oblique angle to said longitudinal axis, andconnecting a plurality of said segments through a transition layer to intertwine said yoke with said coil and provide more than two flux interactions between said yoke and each one of said turns.
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Accused Products
Abstract
A thin film magnetic transducer is formed in a plurality of layers and comprises a yoke with at least one arm having segments respectively lying in separate said layers and connected through a transition layer, and one or more coils; the coil (or coils) and the yoke are intertwined to provide more than two flux interactions therebetween. In one aspect, the segments of the arm are oriented obliquely to each other and have easy axes of magnetization respectively transverse to the directions of flux conduction through said segments, and the segments are joined together so that flux can pass between them without flowing parallel to the easy axis of any of the segments.
34 Citations
49 Claims
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1. A process for fabricating a thin film magnetic transducer in a plurality of layers and that includes a coil having a plurality of turns, comprising
forming a yoke that includes at least one arm having segments respectively lying in separate said layers, disposing at least one of said segments generally along a longitudinal axis of said transducer and providing said segment with an easy axis of magnetization oriented transverse to a direction of flux conduction through said segment and at an oblique angle to said longitudinal axis, and connecting a plurality of said segments through a transition layer to intertwine said yoke with said coil and provide more than two flux interactions between said yoke and each one of said turns.
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12. A process for fabricating a thin film magnetic transducer that includes a coil, comprising
forming a yoke that includes at least one arm having a plurality of elongated segments, arranging said elongated segments obliquely to each other and providing each said segment with an easy axis of magnetization oriented transverse to the direction of flux conduction through said segment, and joining said segments together to intertwine said yoke with said coil to provide more than two flux interactions therebetween, and to cause flux to pass between said interconnected segments without flowing parallel to the easy axis of said segments.
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26. A process for forming a yoke of a magnetic transducer and inducing an easy axis of magnetization in said yoke by applying a magnetic field thereto, comprising the steps of
providing a substrate on which said yoke will be formed, said substrate being disposed generally along an axis, positioning said substrate to provide an oblique angle between said axis and a first direction, forming a segment of said yoke that extends along said first direction on said substrate while said substrate is positioned at said angle to arrange said segment at said angle with respect to said axis, and applying said magnetic field with said substrate positioned at said angle to induce said easy axis of magnetization in said segment.
Specification