Method and apparatus for optimizing flying height control using heated sliders
View Patent ↗A method and apparatus for optimizing flying height control using heated sliders is disclosed. A first heater is provided in a slider for implementing a first operating characteristic and a second heater is provided in the slider for implementing a second operating characteristic. A power source is provided for activating the first and second heaters. An activation controller is provided for allowing the first and second heaters to be selectively activated by the power source.
1. A method for optimizing flying height control using heated sliders, comprising:
providing a first heater in a slider for implementing a first operating characteristic;
providing a second heater in a slider for implementing a second operating characteristic;
providing a power source for activating the first and second heaters; and
providing an activation controller for allowing the first and second heaters to be selectively activated by the power source.
2. The method of claim 1 , wherein providing a first heater further comprises providing a first heater disposed near the air bearing surface of the slider to satisfy a fast response time requirement.
3. The method of claim 1 , wherein the providing a second heater further comprises providing a second heater disposed away from the air bearing surface of the slider to adjust for environmental temperature variations, to offset flying height sigmas and for read/write operations.
4. The method of claim 1 , wherein providing an activation controller for allowing the first and second heaters to be selectively activated by the power source further comprises providing a low pass filter in series with the first heater and a high pass filter in series with the second heater.
5. The method of claim 4 , wherein providing a power source for activating the first and second heaters further comprises providing an AC power source for generating a low frequency when activating the first heater and a high frequency when activating the second heater.
6. The method of claim 4 , wherein providing the first and second heaters comprises coupling the first and second heaters in parallel.
7. The method of claim 1 , wherein providing the first and second heaters comprises providing separate, independent signal paths to the first and second heaters.
8. The method of claim 1 , wherein providing the first and second heaters comprises coupling the first and second heaters in parallel.
9. The method of claim 1 , wherein providing a power source for activating the first and second heaters further comprises providing a DC power source and wherein the providing an activation controller for allowing the first and second heaters to be selectively activated by the power source further comprise providing a DC power selection scheme.
10. A method of operation of a dual heater slider, comprising:
identifying a first need for activation of a first heater disposed in a slider;
signaling a power source to provide an activation signal for activating the first heater for satisfying the identified first need;
selectively providing the activation signal to the appropriate first heater;
identifying a second need for activation of a second heater disposed in the slider;
signaling a power source to provide an activation signal for activating the second heater for satisfying the identified second need; and
selectively providing the activation signal to the appropriate second heater.
11. A slider for a magnetic storage system, comprising:
a slider body;
a read head and a write head coupled to the slider body;
a first heater disposed near the air bearing surface of the slider body; and
a second heater disposed away from the ABS surface.
12. The slider of claim 11 , wherein the first heater is disposed near the air bearing surface of the slider body to satisfy a fast response time requirement.
13. The slider of claim 11 , wherein the second heater is disposed away from the air bearing surface of the slider body to adjust for environmental temperature variations, to offset flying height sigmas and for read operations.
14. A storage device, comprising:
a magnetic recording medium for recording data thereon;
a slider having a read head and a write head coupled to the slider;
a motor, coupled to the magnetic recording medium, for translating the magnetic recording medium; and
an actuator, coupled to the transducer, for translating the transducer relative to the magnetic recording medium;
wherein the slider further comprises a first heater disposed near the air bearing surface of the slider and a second heater disposed away from the air bearing surface of the slider.
15. The storage device of claim 14 , wherein the first heater is disposed near the air bearing surface of the slider body to satisfy a fast response time requirement.
16. The storage device of claim 14 , wherein the second heater is disposed away from the air bearing surface of the slider body to adjust for environmental temperature variations, to offset flying height sigmas and for read operations.
17. The storage device of claim 14 further comprises a low pass filter in series with the first heater and a high pass filter in series with the second heater.
18. The storage device of claim 17 further comprises an AC power source for generating a low frequency when activating the first heater and a high frequency when activating the second heater.
19. The storage device of claim 17 , wherein the first and second heater are coupled in parallel.
20. The storage device of claim 17 wherein the first and second heaters are coupled using separate, independent signal paths to the first and second heaters.
21. The storage device of claim 17 further comprises a DC power source and a DC power selection scheme for selectively routing activation signals to the first and second heaters.