Low-cost nano-heat pipe

Patent metadata

Field	Value
Publication number	US-10175005-B2
Application number	US-201514673584-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Mar 30, 2015
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A method of fabricating a heat pipe may include providing a first material as a body section. The method may include stamping or etching the body section to include the cavity. A portion of the body section may constitute a wall of the cavity. The method may include stamping or etching the wall of the cavity to provide a set of corrugations on a portion of the wall of the cavity. The method may include forming an opening in the wall of the cavity. The method may include attaching a lid over the cavity. The lid constituting at least a portion of a hermetic seal of the cavity. The method may include attaching a cover to the body section approximately adjacent to the opening in the cavity. The method may include attaching a valve to the body section approximately at the opening to the cavity.

First claim

What is claimed is:

1. A heat pipe device, comprising:
a body section having a set of body section surfaces,
the set of body section surfaces including a top surface, a bottom surface, and a set of body section side surfaces,
the body section including a cavity extending from the top surface toward the bottom surface,
the cavity including a bottom surface and a set of cavity side surfaces,
the cavity being covered by a lid attaching to the top surface of the body section,
an opening extending through a portion of the body section, the opening having a first end provided in the bottom surface and a second end provided in a side surface of the body section, the opening having a bend between the first and second ends, such that the portion of the body section surrounds the opening,

the cavity being hermetically sealable by the lid, the body section, and a cover that covers the opening into the body section,
the bottom surface of the cavity including a set of corrugations.

2. The heat pipe device of claim 1 , the lid being configured to attach to a heat generating module,
the heat generating module being affixed to the lid.

3. The heat pipe device of claim 1 , the cavity being configured to receive a working fluid that fills the cavity to a level approximately even with a top surface of the set of corrugations.

4. The heat pipe device of claim 3 , where
the cavity includes a working fluid in a liquid state and the working fluid in a gaseous state.

5. The heat pipe device of claim 1 , where the set of corrugations are stamped or etched into the bottom surface of the cavity.

6. The heat pipe device of claim 1 , where the set of corrugations are attached to the bottom surface of the cavity.

7. The heat pipe device of claim 1 , where the cavity is stamped into the body section.

8. The heat pipe device of claim 1 , where the cavity is etched into the body section.

9. A heat pipe, comprising:
a body section,
the body section being at least partially covered by a lid that is less than approximately 35 square millimeters in size,
the lid covering a cavity in the body section,
the cavity having a corrugated region extending along a portion of a bottom surface of the body section, the bottom surface of the body section having an opening extending through a portion of the body section from a first end in the bottom surface to a second end in a side surface of the body section, the opening including a bend between the first and second ends, such that the portion of the body section surrounds the opening,
the corrugated region having multiple corrugations,
each corrugation, of the multiple corrugations, being less than approximately 0.75 millimeters in height and being separated from one or more other corrugations, of the multiple corrugations, by less than approximately 0.1 millimeters.

10. The heat pipe of claim 9 , wherein
the opening facilitating evacuation of air from the cavity and injection of a working fluid into the cavity,
the opening being hermetically sealable.

11. The heat pipe of claim 9 , where a particular separation between a first corrugation, of the multiple corrugations, and a second corrugation, of the multiple corrugations, is selected based on a capillary movement of a working fluid injected into the cavity.

12. The heat pipe of claim 9 , where the body section is a three-dimensionally printed body section; and
where the corrugated bottom surface is a three-dimensionally printed corrugated bottom surface.

13. The heat pipe of claim 9 , where the body section is further comprised of multiple body sections,
the multiple body sections being separately fabricated, the multiple body sections being attached together.

Assignees

• Infinera Corp

Inventors

• Osenbach John W
• Tang Jie
• Messenger S Eugene
• Coronati John

Classifications

• H10W40/73

  for cooling by change of state · CPC title

• H10W40/037

  Assembling together parts thereof · CPC title

• B23P15/26

  heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)} · CPC title

• B23P2700/09

  Heat pipes · CPC title

• F28D15/0283

  Means for filling or sealing heat pipes · CPC title