System and method for pre-stressing a read head for improving performance thereof
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsLydia Baril, Ciaran A. Fox, Jih-Shiuan Luo, Peter J. Melz, Chin-Yu Yeh
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Abstract
A system, method and computer program product provide an annealing process for setting a magnetization condition of a read head. An amount of heat for stabilizing magnetization condition of a read head is calculated. A width and amplitude of a voltage pulse that generates the calculated amount of heat in the read head are calculated. A voltage pulse of the calculated width and amplitude is applied to the read head for generating Joule heating in the read head. The width of the voltage pulse is less than one second.
Claims19
An annealing process for setting a magnetization condition of a read head, comprising:
- determining an amount of heat for stabilizing a magnetization condition of a read head;
- calculating a width and amplitude of a voltage pulse for generating the determined amount of heat in the read head;
- and
- sending a voltage pulse of the calculated width and amplitude to the read head for generating Joule heating in the read head;
- wherein the width of the voltage pulse is less than one second.
A system for setting a magnetization condition of a read head, comprising:
- an electrical coupling being coupled to a read head;
- logic for determining an amount of heat for stabilizing a magnetization condition of a read head;
- a processor for calculating a width and amplitude of a voltage pulse for generating the determined amount of heat in the read head;
- and
- a voltage controller for sending a voltage pulse of the calculated width and amplitude to the read head via the electrical coupling for generating Joule heating in the read head;
- wherein the width of the voltage pulse is less than one second.
A computer program product for setting a magnetization condition of a read head, comprising:
- computer code that determines an amount of heat for stabilizing a magnetization condition of a read head;
- computer code that calculates a width and amplitude of a voltage pulse for generating the determined amount of heat in the read head;
- and
- computer code that sends a voltage pulse of the calculated width and amplitude to the read head for generating Joule heating in the read head;
- wherein the width of the voltage pulse is less than one second.
A system for setting a magnetization condition of a read head, comprising:
- a hard drive having a read head and an electrical coupling;
- a voltage controller coupled to the hard drive for sending a voltage pulse of a calculated width and amplitude to the read head via the electrical coupling for generating Joule heating in the read head;
- wherein the width of the voltage pulse is less than one second.
Dependencies are inferred from the claim text.