Electronic device and heat dissipating electromagnetic shielding structure

Patent metadata

Field	Value
Publication number	US-11638367-B2
Application number	US-202117351465-A
Country	US
Kind code	B2
Filing date	Jun 18, 2021
Priority date	Aug 12, 2020
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

An electronic device includes a substrate, at least one electronic element and a heat dissipating electromagnetic shielding structure. The heat dissipating electromagnetic shielding structure is disposed on the substrate and covers the at least one electronic element, wherein the heat dissipating electromagnetic shielding structure includes a shielding frame and a heatsink. The shielding frame includes a plurality of spring members. The spring members are bent toward the substrate and partially abut against the heatsink. When the heatsink and the shielding frame are correspondingly arranged, a shielding space is defined, the electronic element is disposed in the shielding space, and a heat generated by the at least one electronic element is conducted out of the shielding space via the heatsink.

First claim

What is claimed is:

1. An electronic device, comprising:
a substrate;
at least one electronic element disposed on the substrate; and
a heat dissipating electromagnetic shielding structure disposed on the substrate and covering the at least one electronic element, wherein the heat dissipating electromagnetic shielding structure comprises:
a shielding frame having a first opening and a second opening, wherein the first opening is covered by the substrate, and the shielding frame comprises:
a plurality of spring members separately disposed on an inner edge of the second opening, wherein the spring members are bent toward the substrate, at least one of the spring members comprises a connecting section, a bending section and a cantilever section, the connecting section is connected to the shielding frame, and a bent of the at least one of the spring members toward the substrate is formed by the bending section; and

a heatsink disposed on the shielding frame and covering the second opening, and the spring members partially abutting against the heatsink, wherein the heatsink comprises:
a body; and
a connecting structure disposed on the body and comprising a bending portion and a bottom portion, wherein a shape of the connecting structure corresponds to a shape of the second opening, and a size of the connecting structure is equal to an opening size of the second opening;

wherein when the heatsink and the shielding frame are correspondingly arranged, a shielding space is defined by the heatsink, the shielding frame and the substrate, the at least one electronic element is disposed in the shielding space, and a heat generated by the at least one electronic element is conducted out of the shielding space via the heatsink; and
wherein when the heatsink and the shielding frame are correspondingly arranged, the connecting structure correspondingly covers the second opening, the bending portion is corresponding to the bending section of the at least one of the spring member, and the cantilever section of the at least one of the spring members abuts against the bottom portion.

2. The electronic device of claim 1 , wherein a number of the spring members disposed on one side frame of the shielding frame is N, a total length of the one side frame is X mm, a width of the one side frame is C mm, a distance between two of the spring members disposed adjacent to each other on the one side frame is A mm, a width of each of the spring members is B mm, and the following condition is satisfied:

N
=

X
-
A
-

2
⁢
C

A
+
B

.

3. The electronic device of claim 2 , wherein a thickness of the shielding frame is T mm, and the following condition is satisfied:
A≥ 1 T.

4. The electronic device of claim 2 , wherein the following conditions are satisfied:
B≥ 1.5 mm; and
C≥ 1.5 mm.

5. The electronic device of claim 1 , wherein at least some of the spring members are equidistantly disposed on the inner edge of the second opening.

6. The electronic device of claim 1 , wherein a maximum horizontal height of the cantilever section is smaller than or equal to a horizontal height of the connecting section and is larger than a minimum horizontal height of the bending section.

7. The electronic device of claim 1 , wherein the heat dissipating electromagnetic shielding structure further comprises:
at least one thermal pad disposed between the at least one electronic element and the heatsink.

8. A heat dissipating electromagnetic shielding structure, which is for performing an electromagnetic shielding to at least one electronic element disposed on a substrate, comprising:
a shielding frame having a first opening and a second opening, wherein the first opening is covered by the substrate, and the shielding frame comprises:
a plurality of spring members separately disposed on an inner edge of the second opening, wherein the spring members are bent toward the substrate, each of the spring members comprises a connecting section, a bending section and a cantilever section, the connecting section is connected to the shielding frame, and a bent of at least one of the spring members toward the substrate is formed by the bending section; and

a heatsink disposed on the shielding frame and covering the second opening, and the spring members partially abutting against the heatsink, wherein the heatsink comprises:
a body; and
a connecting structure disposed on the body and comprising a bending portion and a bottom portion, wherein a shape of the connecting structure corresponds to a shape of the second opening, and a size of the connecting structure is equal to an opening size of the second opening;

wherein when the heatsink and the shielding frame are correspondingly arranged, a shielding space is defined by the heatsink, the shielding frame and the substrate, the at least one electronic element is disposed in the shielding space, and a heat generated by the at least one electronic element is conducted out of the shielding space via the heatsink; and
wherein when the heatsink and the shielding frame are correspondingly arranged, the connecting structure correspondingly covers the second opening, the bending portion is corresponding to the bending section of the at least one of the spring members, and the cantilever section of the at least one of the spring members abuts against the bottom portion.

9. The heat dissipating electromagnetic shielding structure of claim 8 , wherein a number of the spring members disposed on one side frame of the shielding frame is N, a total length of the one side frame is X mm, a width of the one side frame is C mm, a distance between two of the spring members disposed adjacent to each other on the one side frame is A mm, a width of each of the spring members is B mm, and the following condition is satisfied:

N
=

X
-
A
-

2
⁢
C

A
+
B

.

10. The heat dissipating electromagnetic shielding structure of claim 9 , wherein a thickness of the shielding frame is T mm, and the following condition is satisfied:
A≥ 1 T.

11. The heat dissipating electromagnetic shielding structure of claim 9 , wherein the following conditions are satisfied:
B≥ 1.5 mm; and
C≥ 1.5 mm.

12. The heat dissipating electromagnetic shielding structure of claim 8 , wherein at least some of the spring members are equidistantly disposed on the inner edge of the second opening.

13. The heat dissipating electromagnetic shielding structure of claim 8 , wherein a maximum horizontal height of the cantilever section is smaller than or equal to a horizontal height of the connecting section

Assignees

• Wistron Neweb Corp

Inventors

• Chen Yan-Da
• Peng Chien-Ming
• Liu Yu-Jen
• Lin Chih-Chuan
• Lin Chi-Te

Classifications

• H05K7/2049 Primary

  Pressing means used to urge contact, e.g. springs · CPC title

• H10W40/70

  Fillings or auxiliary members in containers or in encapsulations for thermal protection or control · CPC title

• H10W40/22 Primary

  characterised by their shape, e.g. having conical or cylindrical projections · CPC title

• H05K7/20454

  with a conformable or flexible structure compensating for irregularities, e.g. cushion bags, thermal paste · CPC title

• H05K7/20472

  Sheet interfaces · CPC title