Recordable disc and motor

• US 7,965,589 B2
• Filed: 01/23/2007
• Issued: 06/21/2011
• Est. Priority Date: 01/23/2007
• Status: Expired due to Fees

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Leuthold, Hans, White, Andrew, Amin, Nurul, Bonin, Wayne, Rafaelof, Menachem, Ver Meer, Bradley, Hipwell, Roger, Pendray, John
• Primary Examiner(s): Ruthkosky; Mark
• Assistant Examiner(s): Harris; Gary D
• Application Number:
  US11/656,811
• Publication Number:
  US 20080174899A1
• Time in Patent Office: 1,610 Days
• Field of Search: None
• US Class Current: 369/43
• CPC Class Codes: G11B 33/123 Mounting arrangements of constructional parts onto a chassis

Abstract

A device comprises a recordable disc, a substrate adjacent to the recordable disc, and an actuation mechanism fixed to the substrate. The recordable disc includes a base layer and a recordable layer on the base layer. Additional electrodes or magnetic components may be placed on the base layer to provide electromagnetic or electrostatic forces to rotate the recordable disc when acted on by the actuation mechanism. As an example, the invention may utilize MEMS techniques in order to integrate a disc and motor of a disc drive as a common component.

Claims

1. A device comprising:

a recordable disc, including;

a recordable surface, and

at least two conductive plates;

a substrate adjacent to the recordable disc; and

at least two electrodes fixed to the substrate, wherein voltage applied to the electrodes is adjusted to provide electrostatic forces on the conductive plates to rotate the recordable disc.

8. The device of claim 1, further comprising a sensing system for locating a position of the recordable disc within the device.

9. The device of claim 8, further comprising a controller, wherein the controller adjusts the voltage according to information regarding the position of the recordable disc from the sensing system.

10. The device of claim 9, wherein the controller adjusts the voltage to maintain an axis of rotation and a plane of rotation of the recordable disc.

15. The device of claim 1, further comprising a sensing system for locating a position of the recordable disc within the device.

16. The device of claim 15, further comprising a controller, wherein the controller adjusts the voltage applied to the electrodes fixed to the substrate according to information regarding the position of the recordable disc from the sensing system.

2. A device comprising:

a recordable disc including;

a base layer,

a recordable layer on the base layer, and

a means for receiving an actuation force comprising at least two conductive plates; and

a means for converting electrical signals into the actuation force to rotate the recordable disc, wherein the means for converting the electrical signals into the actuation force comprises at least two electrodes, wherein the actuation force is an electrostatic force between the at least two electrodes and the at least two conductive plates.

3. A device comprising:

a recordable disc including;

a base layer,

a recordable layer on the base layer, and

a means for receiving an actuation force comprising at least two coils in the base layer of the recordable disc; and

a means for converting electrical signals into the actuation force to rotate the recordable disc.

5. The device of claim 3, wherein the electrical signals comprise variable voltages.

11. The device of claim 3, wherein the means for converting the electrical signals into the actuation force secures the recordable disc when the device is not operating.

12. The device of claim 3, further comprising:

an actuator assembly including an actuator arm; and

a motion limiter to prevent the actuator assembly from contacting the recordable disc, wherein the motion limiter is located at a distance of less than 25 micrometers from the actuator arm.

13. The device of claim 3, further comprising a hub fixed to a substrate adjacent to the recordable disk, wherein the recordable disc rotates about the hub relative to the substrate.

14. The device of claim 3, further comprising a shield layer that insulates the recordable layer from electromagnetic fields produced by the means for converting electrical signals into the actuation force.

4. A device comprising:

a recordable disc including;

a base layer,

a recordable layer on the base layer, and

a means for receiving an actuation force comprising magnetic components in the base layer of the recordable disc; and

a means for converting electrical signals into the actuation force to rotate the recordable disc.

6. The device of claim 4, wherein the magnetic components include magnetically permeable material.

7. The device of claim 4, wherein the magnetic components include permanent magnets.