Surface acoustic wave-based sensing and actuation of contamination
AssigneeSeagate Technology LLC
InventorNarayanan Ramakrishnan
Life of this patent
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Abstract
A method includes producing a first surface acoustic wave (SAW) on a magnetic head slider using a first interdigitated transducer (IDT), wherein the SAW has a first set of wave characteristics. The method also includes receiving the first SAW at a second IDT on the magnetic head slider. The method also includes analyzing the SAW for a second set of wave characteristics. The method also includes determining, based on the analyzing, that a substance having at least one characteristic is located in a path of the SAW on the magnetic head slider.
Claims21
1-20. (canceled)
A method of slider surface analysis, comprising:
- receiving a first surface acoustic wave (SAW) at a transducer on a magnetic head slider;
- analyzing the first SAW for one or more wave characteristics;
- and
- determining, based on the analyzing, that a substance having at least one characteristic is detected on the magnetic head slider.
A head slider apparatus for use in a hard-disk drive, comprising:
- a magnetic head slider comprising a first surface, wherein a first transducer and a second transducer are located on the first surface;
- a controller in communication with the first transducer and the second transducer;
- wherein the first transducer is configured to create a first surface acoustic wave (SAW) having a first set of wave characteristics;
- wherein the second transducer is configured to receive the first SAW created by the first transducer, the received first SAW having a second set of wave characteristics;
- and
- wherein the controller is configured to analyze the received first SAW by comparing the second set of wave characteristics to the first set of wave characteristics.
A method for actuating a substance, comprising:
- receiving a first set of wave characteristics;
- determining, based on the first set of wave characteristics, that a substance having at least one characteristic is located on a surface of a magnetic head slider;
- and
- producing a first wave on the surface of the magnetic head slider using a first transducer, based on the first set of wave characteristics.
Dependencies are inferred from the claim text.