Method for enhancing thermal stability, improving biasing and reducing damage from electrostatic discharge in self-pinned abutted junction heads
AssigneeHGST Netherlands B.V.
InventorsHardayal Singh Gill, Wen-Chien Hsiao, Jih-Shiuan Luo
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Abstract
A method for enhancing thermal stability, improving biasing and reducing damage from electrical surges in self-pinned abutted junction heads. The method includes forming a free layer, forming first hard bias layers abutting the free layer and forming second hard bias layers over the first hard bias layers discontiguous from the free layer, the second hard bias layers being anti-parallel to the first hard bias layers, the first and second hard bias layers providing a net longitudinal bias on the free layer.
Claims13
A method for forming self-pinned abutted junction heads, comprising:
- forming a free layer having a first substantially vertical end and a second substantially vertical end defining a width selected to form a desired trackwidth;
- forming an extended self-pinned ferromagnetic bias layer extending beyond the substantially vertical ends of the free layer;
- and
- forming a first and second hard bias layers over the extended self-pinned ferromagnetic bias layer extending beyond the substantially vertical ends of the free layer and with only a portion of the first and second hard bias layers and with only a portion of the first and second hard bias layers abutting at least a portion of the first and second substantially vertical ends of the free layer in a longitudinal direction.
A method for forming self-pinned abutted junction heads, comprising:
- forming a free layer having a first substantially vertical end and a second substantially vertical end defining a width selected to form a desired trackwidth;
- forming an extended self-pinned ferromagnetic bias layer extending beyond the substantially vertical ends of the free layer;
- and
- forming a first and second hard bias layer abutting at least a portion of the first and second substantially vertical ends of the free layer in a longitudinal direction and over the extended self-pinned ferromagnetic bias layer extending beyond the substantially vertical ends of the free layer, forming a first and second hard bias layer further comprising:
- forming a bottom layer for each of the first and second hard bias layers, each bottom layer having a first thickness and a portion thereof abutting the first and second substantially vertical ends of the free layer in the longitudinal direction,
- forming a top layer having a thickness less than the thickness of the bottom layer over the bottom layer.
Dependencies are inferred from the claim text.