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AssigneeInternational Business Machines Corporation
InventorMichael Andrew Parker
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In a T-head design, it is desirable to reduce the side-writing that occurs during the write operation. The side-writing causes the track width to increase and therefore reduces the track density that can be achieved. The side-writing is caused by certain corners of the T-head producing extraneous fluxes over the magnetic disk. The extraneous fluxes write to the magnetic disk, causing the track width to be increased. The present invention recesses part of the T-head from the air bearing surface by a focused ion beam milling, an ion milling, or an etching process. The extraneous fluxes are therefore recessed from the magnetic disk by a shallow distance sufficient to prevent writing to the magnetic disk, but not so great a distance to inhibit the flux carrying capacity of the structure to the actively writing pole tip.
A method of producing a write head with reduced side-writing during the write operation of a magnetic disk drive wherein the write head comprises a first pole piece, a second pole piece, a non-magnetic layer between the first and second pole pieces, and a third pole piece wherein the third pole piece conducts magnetic flux to the second pole piece, the method comprising the step of:
A write head with reduced side-writing comprising:
A magnetic read/write head having a write head wherein the write head comprises:
A hard disk drive comprising:
Dependencies are inferred from the claim text.