ABS design with multiple heaters
AssigneesSAE Magnetics (H.K.) Ltd., Headway Technologies, Inc.
InventorsEllis Cha, Ben Kwun Pan Ng
Life of this patent
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Abstract
A TAMR (thermal assisted magnetic recording) equipped DFH (dynamic flying height) type slider ABS design, when operating in a HDD (hard disk drive) produces exceptional low pressure/stiffness for improved touch down detection and back-off efficiency as well as wear and damage reduction due to the improved capabilities as well as reduction in heat transfers. The supplementation of the slider with multiple heaters, three herein, disposed about the write-head in the cross-track direction provides the slider with enhanced dynamic stability that would normally not be achievable with the exceptional low pressure/stiffness.
Claims20
A TAMR (thermal assisted magnetic recording) slider comprising:
- a TAMR apparatus for supplying thermal energy to heat a small region of a rotatable magnetic recording medium, whereby a writeability of said rotatable magnetic recording medium within said region is enhanced;
- a read/write element for writing on said rotatable magnetic medium;
- and
- multiple heater elements, including a first number of heater elements formed over said read/write element and a second number of heater elements variously disposed about said read/write element in a cross-track direction, said heaters providing DFH (dynamic fly height) operation to said slider and also providing dynamic stability during operation of said slider in a HDD (hard disk drive);
- wherein
- said slider has an ABS topography that provides low pressure/stiffness to enhance touch down detection and back-off capability;
- and wherein
- said slider is resistant to wear and damage resulting from touch downs and heat transfer from said TAMR heated recording medium.
A hard disk drive (HDD) comprising:
- a rotatable magnetic recording medium;
- a TAMR slider, including an apparatus for supplying thermal energy to a small region of said rotatable magnetic recording medium, whereby a writeability of said rotatable magnetic recording medium within said region is enhanced;
- a read/write element embedded in said slider for writing on said rotatable magnetic medium;
- and
- multiple heaters, including a first number of heater elements formed over said read/write element and a second number of heater elements disposed about said read/write element in a cross-track direction, said heaters providing DFH (dynamic fly height) operation to said slider and also providing dynamic stability during operation of said HDD;
- wherein
- said slider has an ABS topography that provides low pressure/stiffness to enhance touch down detection and back-off capability;
- and wherein
- said slider is resistant to wear and damage resulting touch downs and from heat transfer from said heated recording medium.
Dependencies are inferred from the claim text.