Low mass microactuator and method of manufacture
First Claim
Patent Images
1. A disc drive data storage system, comprising:
- a disc mounted to a motor for rotating the disc about an axis, the disc having a surface for storing data thereon;
an access arm having a proximal end and a distal end;
a slider connected to the distal end of the access arm and disposed adjacent the disc surface;
a comb microactuator mounted on the slider, the microactuator including a stator portion having fingers and a rotor portion having fingers interdigitated with the fingers on the stator portion; and
a transducer mounted on the rotor portion of the microactuator, such that actuation of the microactuator moves the transducer relative to the slider in a direction generally parallel to the fingers.
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Abstract
A disc drive includes a disc mounted to a motor, an access arm, and a slider connected to the access arm. A comb-type microactuator is mounted on the slider and a transducer is mounted to the microactuator such that actuation of the microactuator moves the transducer relative to the slider.
25 Citations
18 Claims
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1. A disc drive data storage system, comprising:
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a disc mounted to a motor for rotating the disc about an axis, the disc having a surface for storing data thereon;
an access arm having a proximal end and a distal end;
a slider connected to the distal end of the access arm and disposed adjacent the disc surface;
a comb microactuator mounted on the slider, the microactuator including a stator portion having fingers and a rotor portion having fingers interdigitated with the fingers on the stator portion; and
a transducer mounted on the rotor portion of the microactuator, such that actuation of the microactuator moves the transducer relative to the slider in a direction generally parallel to the fingers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
a control circuit for supplying signals to the microactuator, the microactuator having a displacement output in response to a voltage input signal from the control circuit.
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7. A disc drive data storage system as in claim 6, wherein the voltage input signal is approximately 12 volts or less.
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8. A disc drive data storage system as in claim 7, wherein the rotor has a travel of approximately ±
- 10 μ
m or more.
- 10 μ
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9. A disc drive data storage system as in claim 5, further comprising:
a control circuit for supplying signals to the microactuator, the microactuator having an acceleration output in response to a voltage input signal from the control circuit.
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10. A disc drive data storage system as in claim 1, wherein:
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the stator portion includes a plurality of parallel electrodes mounted on a first column, the first column connected to the slider;
the rotor portion includes a plurality of parallel electrodes mounted on a second column;
the rotor electrodes positioned between and parallel to the stator electrodes;
a transducer mounting surface connected to the second column;
a spring having a first portion connected to the slider and a second portion connected to the transducer mounting surface such that the rotor electrodes may move in a substantially parallel path relative to the stator electrodes.
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11. A disc drive data storage system as in claim 10, wherein the microactuator includes a plurality of stator portions and rotor portions connected in parallel.
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12. A disc drive data storage system as in claim 11, further comprising:
a control circuit for supplying signals to the microactuator, the microactuator having a displacement output in response to a voltage input signal from the control circuit.
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13. A disc drive data storage system as in claim 12, wherein the voltage input signal is approximately 12 volts or less.
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14. A disc drive data storage system as in claim 13, wherein the rotor has a travel of approximately ±
- 10 μ
m or more.
- 10 μ
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15. A disc drive data storage system as in claim 11, wherein the rotor portion, the transducer mounting surface and the transducer have a total mass less than 100 μ
- g.
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16. A disc drive data storage system as in claim 11, wherein the rotor portion, the transducer mounting surface and the transducer have a total mass less than 50 μ
- g.
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17. A disc drive data storage system as in claim 11, wherein the rotor portion, the transducer mounting surface and the transducer have a total mass less than 10 μ
- g.
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18. A disc drive data storage system, comprising:
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a disc mounted to a motor for rotating the disc about an axis, the disc having a surface for storing data thereon;
an access arm having a proximal end and a distal end;
a slider connected to the distal end of the access arm and disposed adjacent the disc surface;
a comb microactuator mounted on the slider, the microactuator including a stator portion having fingers and a rotor portion having fingers interdigitated with the fingers on the stator portion; and
a transducer mounted on the rotor portion of the microactuator, such that actuation of the microactuator moves the transducer relative to the slider a distance of at least 10 μ
m in a direction generally parallel to the fingers.
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Specification
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Current AssigneeSeagate Technology LLC (Seagate Technology Holdings Plc)
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Original AssigneeSeagate Technology LLC (Seagate Technology Holdings Plc)
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InventorsBonin, Wayne A.
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Primary Examiner(s)Chen, Tianjie
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Application NumberUS09/148,239Time in Patent Office2,069 DaysField of Search360/106, 360/103, 310/309, 361/283US Class Current360/294.3CPC Class CodesG11B 5/5552 using fine positioning mean...
