Magnetic storage device
AssigneeVarian Semiconductor Equipment Associates, Inc.
InventorsFrank Sinclair, Alexander C. Kontos, Rajesh Dorai
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Abstract
A write head for a magnetic storage device includes a writing tip comprising a magnetic material, a write pulse generator configured to generate a write pulse signal comprising a varying voltage bias between the magnetic storage device and the writing tip. The write pulse signal comprising one or more write pulses effective to tunnel electrons from the writing tip to the magnetic storage device. The data stream generator configured to provide a data stream signal to the writing tip where the data stream signal is operative to vary spin polarity in the electrons from a first polarity to a second polarity.
Claims19
A write head for a magnetic storage device comprising:
- a writing tip comprising a magnetic material;
- a write pulse generator configured to generate a write pulse signal comprising a varying voltage bias between the magnetic storage device and the writing tip, the write pulse signal including a plurality of write pulses effective to tunnel electrons from the writing tip to the magnetic storage device;
- a data stream generator configured to provide a data stream signal to the writing tip, the data stream signal operative to vary spin polarity in the electrons from a first polarity to a second polarity, wherein the data stream signal comprises a plurality of pulses, wherein the write pulse signal and data stream signal are interoperative to generate a plurality of write operations.
A magnetic storage device to store data in a magnetic disk, comprising
- a writing tip disposed on a distal end of a writing member;
- a write pulse generator configured to provide a write pulse signal between the writing tip and the magnetic disk, the write pulse signal comprising a plurality of write pulses operative to generate tunneling electrons that tunnel from the writing tip to the magnetic disk;
- a data stream generator configured to provide a data stream signal to the writing tip as a plurality of pulses, the data stream signal operative to generate first electrons at the writing tip having a first spin polarity during a first set of data stream periods, and to generate second electrons at the writing tip having a second spin polarity during a second set of data stream periods, wherein the first and second data stream periods coincide with respective write pulses.
A method of recording data in a magnetic storage device, comprising:
- generating a write pulse signal comprising a varying voltage to be applied to the magnetic storage device, the write pulse signal comprising a plurality of write pulses effective to provide tunneling electrons to the magnetic storage device;
- providing a data stream signal comprising a plurality of pulses that are operative to vary spin polarity in the tunneling electrons from a first polarity during first periods to a second polarity during second periods;
- and
- synchronizing the write pulse signal and data stream signal, wherein the first periods are aligned with respective first write pulses of the plurality of write pulses and the second periods are aligned with respective second write pulses of the plurality of write pulses, wherein the voltage bias of the write pulse signal is effective to tunnel electrons when the electrons have the first polarity during the first periods to write a “zero” bit, and wherein the voltage bias of the write pulse signal is effective to tunnel electrons when the electrons have the second polarity during the second periods to write a “one” bit.
Dependencies are inferred from the claim text.