IP Library Granted Patent US 6,943,980
Granted Patent B2
US 6,943,980 · App. 10/055,456 · Granted Sep 13, 2005

Electrostatic track following using patterned media

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,943,980
App. No.
10/055,456
Granted
Sep 13, 2005
Kind
B2
Abstract

A transducing head positioning system for use with patterned media. The patterned media comprises a plurality of data tracks and grooves. The grooved tracks can be used in connection with electrodes on a slider to create an electrostatic motor for microactuation of the slider.

Claims (55)

1. A transducing head positioning system, the system comprising:

a first portion of an electrostatic motor comprising patterned data storage media having a plurality of data tracks; and

a second portion of the electrostatic motor formed on a slider, wherein the electrostatic motor is used to position a transducing head above a selected data track on the patterned storage media.

2. The transducing head positioning system of claim 1 wherein the plurality of data tracks comprises concentric data tracks.

3. The transducing head positioning system of claim 2 wherein each concentric data track comprises a raised track and a groove.

4. The transducing head positioning system of claim 3 wherein a pitch of each data track is about 2 microinches.

5. The transducing head positioning system of claim 3 wherein the second portion of the electrostatic motor comprises a plurality of electrodes located on a media opposing surface of the slider.

6. The transducing head positioning system of claim 5 wherein a width of the electrodes is about equal to a width of the raised tracks on the patterned storage media.

7. The transducing head positioning system of claim 6 wherein a ratio of the electrodes on the slider to the data track spacing on the patterned storage media is 4 data tracks to 3 electrodes.

8. The transducing head positioning system of claim 7 and further comprising a linear actuator for positioning the slider.

9. The transducing head positioning system of claim 5 wherein the plurality of electrodes further comprises:

a plurality of phase one electrodes;

a plurality of phase two electrodes; and

a plurality of phase three electrodes.

10. An electrostatic slider positioning system, the system comprising:

patterned media comprising a plurality of data tracks; and

a slider located proximate the patterned media, wherein the slider includes a plurality of electrodes configured to be selectively activated to cause an electrostatic attraction between an electrode and a data track, and position the slider at a selected data track.

11. The electrostatic slider positioning system of claim 10 wherein each data track comprises a track and a groove.

12. The electrostatic slider positioning system of claim 11 wherein the plurality of electrodes on the slider and the plurality of data tracks on the patterned media form an electrostatic motor.

13. The electrostatic slider positioning system of claim 12 wherein a width of each electrode is about the same as a width of a track on the disc.

14. The electrostatic slider positioning system of claim 13 wherein a ratio of the spacing of the electrodes on the slider to the spacing of the data tracks on the patterned storage media is 4 data tracks to 3 electrodes.

15. The electrostatic slider positioning system of claim 13 wherein the electrodes have a length which allows the electrodes follow a curvature of data tracks at both an inner and an outer diameter of the disc.

16. The electrostatic slider positioning system of claim 15 and further comprising means for linear actuation of the slider as it tracks over the surface of the disc.

17. The electrostatic slider positioning system of claim 12 wherein the plurality of electrodes on the slider comprises:

a first phase electrode;

a second phase electrode; and

a third phase electrode.

18. The electrostatic slider positioning system of claim 17 and further comprising a control system for controlling the electrostatic motor by selectively applying a voltage to the first, second, and third phase electrodes.

19. A method of controlling the position of a transducing head above the surface of a patterned electronic storage medium, the method comprising:

suspending a slider above a surface of the storage medium, wherein the slider comprises a plurality of electrodes on a storage medium opposing surface; and

moving the transducing head to a desired data track on the storage medium by actuating an electrostatic motor formed by the plurality of electrodes on the slider and tracks on the patterned electronic storage medium.

20. The method of claim 19 and further comprising coarsely positioning the slider using a linear actuator.

21. The method of claim 19 wherein actuating the electrostatic motor comprises applying a voltage to an electrode of the electrostatic motor to create an electrostatic attraction between the electrode and a track on the medium.

22. The method of claim 21 wherein actuating the electrostatic motor further comprises applying a voltage to selected electrodes.

23. The method of claim 22 wherein applying a voltage to selected electrodes comprises:

configuring the plurality of electrodes to comprise a first phase electrode, a second phase electrode, and a third phase electrodes; and

controlling the application of a voltage to the first, second, and third phase electrodes to move the slider across the storage medium.

24. A transducing head positioning system, the system comprising:

patterned data storage media comprising a plurality of data tracks, wherein each data track comprises a raised track and a groove, the patterned data storage media forming a first portion of an electrostatic motor; and

a slider carrying a second portion of the electrostatic motor, wherein the second portion of the electrostatic motor comprises a plurality of electrodes located on a media opposing surface of the slider, wherein a width of the electrodes is about equal to a width of the raised tracks on the patterned storage media, and wherein the electrostatic motor is used to position a transducing head above a selected data track on the patterned storage media.

25. The transducing head positioning system of claim 24 wherein a ratio of the electrodes on the slider to the data track spacing on the patterned storage media is 4 data tracks to 3 electrodes.

26. The transducing head positioning system of claim 25 and further comprising a linear actuator for positioning the slider.

27. An electrostatic transducer positioning system, the system comprising:

patterned media comprising a plurality of data tracks, wherein each data track comprises a track and a groove; and

a transducer located proximate the patterned media, wherein the transducer comprises a plurality of electrodes which form an electrostatic motor together with the plurality of data tracks, the plurality of electrodes comprising a first phase electrode, a second phase electrode, and a third phase electrode which can be selectively activated to cause an electrostatic attraction between an electrode and a data track.

28. The electrostatic transducer positioning system of claim 27 and further comprising a control system for controlling the electrostatic motor by selectively applying a voltage to the first, second, and third phase electrodes.

29. A method of controlling the position of a transducer above patterned media, the method comprising:

suspending a transducer above a surface of the media, wherein the transducer includes a plurality of electrodes on a media opposing surface; and

moving the transducer to a desired data track on the media by applying a voltage to at least one of the plurality of electrodes to create an electrostatic attraction between the electrode and a data track on the media.

30. The method of claim 29 wherein moving the transducer further comprises:

selecting three of the plurality of electrodes; and

applying a voltage to one of the three selected electrodes.

31. The method of claim 29 wherein applying a voltage to at least one of the plurality of electrodes comprises:

configuring the plurality of electrodes to comprise a first phase electrode, a second phase electrode, and a third phase electrode; and

controlling the application of a voltage to the first, second, and third phase electrodes to move the transducer across the media.

Assignments (8)
RELEASE OF SECURITY INTEREST Recorded Jul 23, 2025
From: THE BANK OF NOVA SCOTIA
To: SEAGATE TECHNOLOGY PUBLIC LIMITED COMPANY; SEAGATE TECHNOLOGY; SEAGATE TECHNOLOGY HDD HOLDINGS; I365 INC.; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL; SEAGATE HDD CAYMAN; SEAGATE TECHNOLOGY (US) HOLDINGS, INC.
Reel/Frame 072193/0001 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS Recorded Jul 19, 2013
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT AND SECOND PRIORITY REPRESENTATIVE
To: SEAGATE TECHNOLOGY LLC; EVAULT INC. (F/K/A I365 INC.); SEAGATE TECHNOLOGY INTERNATIONAL; SEAGATE TECHNOLOGY US HOLDINGS, INC.
Reel/Frame 030833/0001 →
SECURITY AGREEMENT Recorded Mar 24, 2011
From: SEAGATE TECHNOLOGY LLC
To: THE BANK OF NOVA SCOTIA, AS ADMINISTRATIVE AGENT
Reel/Frame 026010/0350 →
RELEASE Recorded Jan 19, 2011
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: SEAGATE TECHNOLOGY HDD HOLDINGS; MAXTOR CORPORATION; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL
Reel/Frame 025662/0001 →
SECURITY AGREEMENT Recorded May 15, 2009
From: MAXTOR CORPORATION; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT AND FIRST PRIORITY REPRESENTATIVE; WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT AND SECOND PRIORITY REPRESENTATIVE
Reel/Frame 022757/0017 →
RELEASE OF SECURITY INTERESTS IN PATENT RIGHTS Recorded Dec 21, 2005
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT (FORMERLY KNOWN AS THE CHASE MANHATTAN BANK AND JPMORGAN CHASE BANK)
To: SEAGATE TECHNOLOGY LLC
Reel/Frame 016926/0388 →
SECURITY AGREEMENT Recorded Aug 5, 2002
From: SEAGATE TECHNOLOGY LLC
To: JPMORGAN CHASE BANK, AS COLLATERAL AGENT
Reel/Frame 013177/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2002
From: BONIN, WAYNE A.; BOUTAGHOU, ZINE-EDDINE
To: SEAGATE TECHNOLOGY LLC
Reel/Frame 012529/0350 →