Vapor chamber having an electromagnetic shielding layer and methods of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11304334-B2
Application number	US-201816009129-A
Country	US
Kind code	B2
Filing date	Jun 14, 2018
Priority date	Jun 14, 2018
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A vapor chamber includes an electromagnetic (EM) shielding layer. The vapor chamber is constructed from a structural base material that provides for a suitable size, strength, and/or weight for a specific application. The vapor chamber is treated at the region(s) to provide suitable EM shielding characteristics for the specific application. For example, an oxidation layer is removed from the region(s) to expose the structural base material while the vapor chamber is in an inert environment that prevents further oxidation. Then, while the vapor chamber remains within the same inert environment, a material having suitable electrical conductive properties is deposited onto the exposed structural base material to form an EM shielding layer at the region(s). When the vapor chamber is installed into an electronic device, the EM shielding layer may be electrically grounded so as to isolate one or more components within the electronic device from EM signal interference.

First claim

What is claimed is:

1. An electro-thermal system, comprising:
a first antenna for generating first electromagnetic signals;
a second antenna for generating second electromagnetic signals;
a vapor chamber, in thermal communication with a heat source, that has an electromagnetic shielding layer on an outer surface of a region that is positioned between the first antenna and the second antenna, and that attenuates (i) a portion of the first electromagnetic signals that is directed toward the second antenna, and (ii) a portion of the second electromagnetic signals that is directed toward the first antenna, wherein the vapor chamber comprises another region that is adjacent to the region and that has a corrosion layer on an outer surface; and
an electronic circuit having a ground that is in electric contact with the region that is positioned between the first antenna and the second antenna.

2. The electro-thermal system of claim 1 , wherein the electromagnetic shielding layer is deposited onto a structural base material in accordance with a predetermined surface treatment that includes:
enclosing the vapor chamber in an inert environment; and
while the vapor chamber is within the inert environment:
removing an oxidation layer from the vapor chamber to expose the structural base material, and
depositing the electromagnetic shielding layer onto the structural base material.

3. The electro-thermal system of claim 2 , wherein the structural base material is a titanium-alloy.

4. The electro-thermal system of claim 1 , wherein a structural base material of the vapor chamber has a first strength-to-weight ratio, and wherein the electromagnetic shielding layer, is deposited onto the structural base material and has a second strength-to-weight ratio that is less than the first strength-to-weight ratio.

5. The electro-thermal system of claim 4 , wherein the structural base material has a first resistivity, and wherein the electromagnetic shielding layer has a second resistivity that is at least ten times less than the first resistivity.

6. The electro-thermal system of claim 1 , wherein the electronic circuit is integrated into a circuit board on which the vapor chamber is mounted with a first side facing the first antenna and a second side facing the second antenna.

7. The electro-thermal system of claim 6 , wherein the ground includes one or more grounding contacts that are positioned on the circuit board to contact the region when the vapor chamber is mounted to the circuit board.

8. The electro-thermal system of claim 1 , further comprising a wire having a first end that is mechanically coupled to the region of the vapor chamber and a second end that is mechanically coupled to the ground of the electronic circuit.

9. The electro-thermal system of claim 1 , wherein the first electromagnetic signals generated by the first antenna are emitted at a frequency that is common to the second electromagnetic signals generated by the second antenna.

10. The electro-thermal system of claim 1 , wherein the vapor chamber includes one or more fins located on the region and that extend away from a circuit board, to which the vapor chamber is attached, in order to improve the attenuation of (i) the portion of the first electromagnetic signals that is directed toward the second antenna, and (ii) the portion of the second electromagnetic signals that is directed toward the first antenna.

11. The electro-thermal system of claim 1 , wherein the region comprises a part of the vapor chamber that blocks a direct path between the first antenna and the second antenna.

12. The electro-thermal system of claim 1 , wherein the other region comprises a part of the vapor chamber that does not block a direct path between the first antenna and the second antenna.

13. An apparatus comprising:
at least one support element;
a first antenna that is mounted at a first location of the at least one support element and a second antenna that is mounted at a second location of the at least one support element; and
a vapor chamber that includes an electromagnetic shielding layer on an outer surface of a region that is positioned between the first antenna and the second antenna to attenuate:
first electromagnetic signals that are emitted by the first antenna toward the second antenna, and
second electromagnetic signals that are emitted by the second antenna toward the first antenna,
wherein the vapor chamber comprises another region that is adjacent to the region and that has a corrosion layer on an outer surface; and

an electronic ground that is in electric contact with the region that is positioned between the first antenna and the second antenna.

14. The apparatus of claim 13 , wherein the electromagnetic shielding layer is deposited onto a structural base material in accordance with a predetermined surface treatment that includes:
performing a first surface treatment to remove an oxidation layer from the structural base material at the region of the vapor chamber, and
performing a second surface treatment to deposit a conductive material onto the structural base material at the region of the vapor chamber.

15. The apparatus of claim 14 , wherein each of the first surface treatment and the second surface treatment are performed within an inert environment.

16. The apparatus of claim 15 , wherein the conductive material has a first resistivity that is at least two times greater than a second resistivity of the structural base material.

17. The apparatus of claim 13 , wherein the vapor chamber includes one or more fins that are located at the region, and wherein the one or more fins are electrically grounded.

18. The apparatus of claim 13 , wherein the region comprises a part, and not a whole, of the vapor chamber that blocks a direct path between the first antenna and the second antenna.

19. The apparatus of claim 13 , wherein the vapor chamber includes one or more fins located on the region and that extend away from the at least one support element in order to improve the attenuation of the first electromagnetic signals that are emitted by the first antenna toward the second antenna and the second electromagnetic signals that are emitted by the second antenna toward the first antenna.

20. The apparatus of claim 13 , wherein the other region comprises a part of the vapor chamber that does not block a direct path between the first antenna and the second antenna.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Toleno Brian J
• Hurbi Erin Elizabeth
• Nikkhoo Michael
• Lin Tzu-Yuan

Classifications

• H10W40/73

  for cooling by change of state · CPC title

• F28F19/06

  of metal · CPC title

• H05K7/20309 Primary

  Evaporators · CPC title

• G06F1/203 Primary

  for portable computers, e.g. for laptops · CPC title

• H05K9/00

  Screening of apparatus or components against electric or magnetic fields (devices for absorbing radiation from an antenna H01Q17/00) · CPC title