Electronic device comprising heat transfer member having metal plate and heat transfer material coupled thereto

Patent metadata

Field	Value
Publication number	US-11304337-B2
Application number	US-202017001017-A
Country	US
Kind code	B2
Filing date	Aug 24, 2020
Priority date	Feb 23, 2018
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

Various embodiments of the present invention relate to an electronic device comprising a shielding structure which is arranged on the periphery of an electronic component, and which has an improved heat-radiating performance. The electronic device comprises: a circuit board; a non-elastic shielding member arranged on one surface of the circuit board, the non-elastic shielding member having a concave portion and an opening formed on a part of the concave portion; a processor contained in the concave portion and arranged on the one surface so as to correspond to the opening; a first heat transfer member arranged to contact the outer surface of the processor in at least a partial area of the opening; an elastic shielding member arranged on the periphery of the opening; and a second heat transfer member arranged to contact the first heat transfer member and the elastic shielding member. The second heat transfer member comprises a metal plate and a heat transfer material having a thermal conductivity higher than 1 W/mK. The heat transfer material may be coupled to the metal plate. The present invention may further comprise various other embodiments.

First claim

The invention claimed is:

1. An electronic device comprising:
a circuit board;
an electronic component disposed on the circuit board;
a shield frame member including side walls and a top wall having an opening, and disposed on the circuit board over the electronic component;
a first thermal interface material (TIM) disposed at least partly in contact with an outer surface of the electronic component in at least a portion of a region of the opening;
a shield cover film disposed to cover the opening of the top wall of the shield frame member such that at least a part of the first TIM is disposed between the electronic component and the shield cover film, the shield cover film comprising:
a metal layer, and
a second TIM coupled to the metal layer without a medium disposed in between that has a lower thermal conductivity than the second TIM; and

a heat dissipation member disposed in contact with the shield cover film and configured to receive at least a portion of heat generated by the electronic component,
wherein a first surface of the metal layer of the shield cover film is in contact with a surface of the second TIM of the shield cover film,
wherein a second surface of the metal layer of the shield cover film is in contact with the first TIM,
wherein an inner area of the second surface of the metal layer of the shield cover film is in direct contact with the first TIM,
wherein a fiber layer, comprising fibers plated with copper (Cu) or nickel (Ni), is disposed to overlap at least a portion of an outer area of the second surface of the metal layer of the shield cover film that encloses the inner area, and
wherein the fiber layer is in direct contact with the shield frame member.

2. The electronic device of claim 1 ,
wherein the side walls of the shield frame member are substantially perpendicular to the circuit board and the shield cover film is substantially parallel to the circuit board, and
wherein each of the side walls of the shield frame member is spaced apart from one corresponding side surface of the electronic component.

3. The electronic device of claim 1 , wherein the first surface of the metal layer comprises at least one of fine prominences and recessions.

4. The electronic device of claim 1 , wherein the shield frame member and the shield cover film collectively shield the electronic component to mitigate electromagnetic interference associated with the electronic component.

5. The electronic device of claim 1 , wherein the shield frame member, the fiber layer, and the shield cover film collectively shield the electronic component to mitigate electromagnetic interference associated with the electronic component.

6. The electronic device of claim 1 , wherein the surface of the second TIM of the shield cover film facing the heat dissipation member has an average roughness of a root mean square (RMS) value of 10 um˜100 um.

7. The electronic device of claim 6 , wherein the shield cover film is elastic.

8. The electronic device of claim 1 , wherein the heat dissipation member comprises a vapor chamber or a heat pipe.

9. An electronic device comprising:
a circuit board;
an electronic component disposed on the circuit board;
a shield frame member including side walls and a top wall having an opening, and disposed on the circuit board over the electronic component;
a first thermal interface material (TIM) disposed at least partly in contact with an outer surface of the electronic component in at least a portion of a region of the opening;
a shield cover film disposed to cover the opening of the top wall of the shield frame member such that at least a part of the first TIM is disposed between the electronic component and the shield cover film, the shield cover film comprising:
a metal layer including a first surface that comprises at least one of fine prominences and recessions, and
a second TIM directly coupled to the first surface of the metal layer by hardening a liquid form of the second TIM applied to the first surface of the metal layer; and

a heat dissipation member disposed in contact with the shield cover film and configured to receive at least a portion of heat generated by the electronic component,
wherein a first surface of the metal layer of the shield cover film is in contact with a surface of the second TIM of the shield cover film,
wherein a second surface of the metal layer of the shield cover film is in contact with the first TIM,
wherein an inner area of the second surface of the metal layer of the shield cover film is in direct contact with the first TIM,
wherein a fiber layer, comprising fibers plated with copper (Cu) or nickel (Ni), is disposed to overlap at least a portion of an outer area of the second surface of the metal layer of the shield cover film that encloses the inner area, and
wherein the fiber layer is in direct contact with the shield frame member.

10. The electronic device of claim 9 ,
wherein the side walls of the shield frame member are substantially perpendicular to the circuit board and the shield cover film is substantially parallel to the circuit board, and
wherein each of the side walls of the shield frame member is spaced apart from one corresponding side surface of the electronic component.

11. The electronic device of claim 9 , wherein the shield frame member and the shield cover film collectively shield the electronic component to mitigate electromagnetic interference associated with the electronic component.

12. The electronic device of claim 9 , wherein the shield frame member, the fiber layer, and the shield cover film collectively shield the electronic component to mitigate electromagnetic interference associated with the electronic component.

13. The electronic device of claim 9 , wherein the surface of the second TIM of the shield cover film facing the heat dissipation member has an average roughness of a root mean square (RMS) value of 10 um˜100 um.

14. The electronic device of claim 13 , wherein a medium having a lower thermal conductivity than the second TIM is not disposed between the outer surface of the metal layer and the second TIM.

15. The electronic device of claim 14 , wherein the shield cover film is elastic.

16. The electronic device of claim 9 , wherein the heat dissipation member comprises a vapor chamber or a heat pipe.

17. An electronic device comprising:
a circuit board;
an electronic component disposed on the circuit board;
a shield frame member including side walls and a top wall having an opening, and disposed on the circuit board over the electronic component;
a first thermal interface material (TIM) disposed at least partly in contact with an outer surface of the electronic component in at least a portion of a region of the opening;
a shield cover film disposed to cover the opening of the top wall of the shield frame member such that at least a part of the first TIM is disposed between the electronic component and the shield cover film, the shield cover film comprising:
a metal layer, and
a second TIM coupled to a first surface of the metal layer by hardening a liquid form of the second TIM applied to the first surface of the metal layer such that a medium having a lower thermal conductivity than the second TIM is not disposed between the first surface of the metal layer and the second TIM; and

a heat dissipation member disposed in contact with the shield cover film and configured to receive at least a portion of heat generated by the electronic component,
wherein a first surface of the metal layer of the shield cover film is in contact with a s

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Haejin
• Koo Kyungha
• Park Min
• Bang Jungje

Classifications

• H05K9/00

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

• H05K7/20481 Primary

  characterised by the material composition exhibiting specific thermal properties · CPC title

• C09K5/14

  Solid materials, e.g. powdery or granular · CPC title

• H05K9/0032

  having multiple parts, e.g. frames mating with lids · CPC title

• H05K7/20445 Primary

  the coupling element being an additional piece, e.g. thermal standoff · CPC title