Methods and devices for alleviating thermal boil off in immersion-cooled electronic devices

Patent metadata

Field	Value
Publication number	US-11074943-B2
Application number	US-201916680265-A
Country	US
Kind code	B2
Filing date	Nov 11, 2019
Priority date	Nov 11, 2019
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A base deck for a data storage device includes a body. The body includes a bottom wall and sidewalls that create an internal cavity. The bottom wall includes a textured external surface opposite the internal cavity. The base deck can be coupled to a cover to seal the internal cavity.

First claim

We claim:

1. An apparatus comprising: a base deck for a data storage device, the base deck having a body that includes a bottom wall and sidewalls that create an internal cavity, the bottom wall including a textured external surface opposite the internal cavity; wherein the textured external surface is configured to resist coalescence of bubbles.

2. The apparatus of claim 1 , wherein the textured external surface includes a plurality of channels.

3. The apparatus of claim 2 , wherein the plurality of channels have a width and height less than one millimeter.

4. The apparatus of claim 1 , further comprising:
a circuit board coupled to the body and arranged to at least partially cover the textured external surface.

5. The apparatus of claim 1 , further comprising:
a circuit board coupled to the body and arranged to completely cover the textured external surface.

6. The apparatus of claim 1 , wherein the bottom wall includes a non-textured surface opposite the internal cavity.

7. The apparatus of claim 1 , further comprising:
a top cover coupled to the base deck; and
a spindle motor directly coupled to the base deck.

8. The apparatus of claim 1 , wherein the textured surface includes channels have a depth of 100-5,000 nanometers.

9. The apparatus of claim 1 , wherein the textured surface is an etched textured surface.

10. The apparatus of claim 1 , wherein the data storage device is a hard disk drive.

11. The apparatus of claim 1 , wherein the textured external surface has a roughness that is greater than other external surfaces of the base deck.

12. A system comprising: a data storage system including an enclosure; and data storage devices positioned within the enclosure, the data storage devices each including a base deck with body coupled to a cover, the body of each of the data storage devices including a bottom wall and sidewalls that create an internal cavity, the bottom wall including a textured external surface opposite the internal cavity, wherein each of the data storage devices includes a circuit board that is coupled to the body and that is arranged to at least partially cover the textured external surface; wherein the textured external surface is configured to resist coalescence of bubbles.

13. The system of claim 12 , further comprising:
a cooling system including a tank, wherein the data storage system is positioned within the tank.

14. The system of claim 13 , wherein the tank is at least partially filled with a coolant.

15. The system of claim 14 , wherein the data storage system is at least partially immersed in the coolant.

16. The system of claim 13 , wherein the each of the data storage devices is arranged such that the textured external surface is parallel with a direction perpendicular to a bottom wall of the tank.

17. A method comprising: immersing a data storage device within a dielectric liquid, the data storage device including a body with a textured external surface; operating the data storage device while immersed in the dielectric liquid; and heating the dielectric liquid to a boiling temperature at a point adjacent to the textured external surface; wherein the textured external surface is configured to resist coalescence of bubbles.

18. The method of claim 17 , wherein the heating of the dielectric liquid includes heating the dielectric liquid via an integrated circuit positioned on the data storage devices.

19. The method of claim 17 , wherein the point adjacent to the textured external surface is positioned between a circuit board and the textured external surface of the body of the data storage device.

Assignees

• Seagate Technology Llc

Inventors

• Tsoukatos Antonia
• Dykes John W

Classifications

• G11B33/1413

  by fluid cooling · CPC title

• G06F2200/201

  Cooling arrangements using cooling fluid · CPC title

• G11B33/144 Primary

  by detection, control, regulation of the temperature · CPC title

• G06F1/20 Primary

  Cooling means · CPC title

• G06F1/182

  with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI] · CPC title