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US 5,181,152 AGranted
Leading edge undershoot elimination in thin film heads
AssigneeSeagate Technology LLC
InventorsYing D. Yan, John Bortins, Beat G. Keel, Nurul Amin
Life of this patent
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Abstract
A thin film magnetic read/write head deposited upon a non-magnetic substrate reduces leading edge undershoots in readback pulse signal. A magnetic layer is deposited between the thin film magnetic read/write head and the non-magnetic substrate. Undershoots are reduced by making the leading edge of the thin film head less sensitive to the magnetization transitions in a magnetic storage medium.
Claims14
A thin film magnetic head comprising:
- a non-magnetic substrate;
- a magnetic layer deposited on the non-magnetic substrate, the magnetic layer having a width;
- a bottom pole piece deposited upon the magnetic layer and having a bottom pole tip, the bottom pole tip having a width which is substantially less than the width of the magnetic layer;
- a top pole piece over the bottom pole piece and having a top pole tip, the top and bottom pole pieces defining a high permeability magnetic flux path and a magnetic flux gap between the top pole tip and the bottom pole tip;
- and
- a plurality of conductors between the top pole piece and the bottom pole piece.
3 more elements
A thin film magnetic head comprising:
- a non-magnetic substrate;
- a magnetic layer deposited on the non-magnetic substrate, the magnetic layer having a width;
- a bottom pole tip deposited upon the magnetic layer and having a width which is substantially less than the width of the magnetic layer;
- and
- a top pole tip over the bottom pole tip, the top and bottom pole tips defining a high permeability magnetic flux path and a magnetic flux gap between the top pole tip and the bottom pole tip.
2 more elements
Dependencies are inferred from the claim text.