Shielding film including plurality of layers and electronic device using the same

Patent metadata

Field	Value
Publication number	US-11729957-B2
Application number	US-202217841834-A
Country	US
Kind code	B2
Filing date	Jun 16, 2022
Priority date	Oct 31, 2018
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

An electronic device and a shielding film are disclosed herein. The electronic device includes a printed circuit board and at least one electrical component mounted on the printed circuit board. The shielding film is disposed on at least a part of the printed circuit board to block electromagnetic waves generated by the printed circuit board and/or the electronic component. The shielding film includes a plurality of layers, and is attached to at least part of the printed circuit board and contacting an upper side surface of the electronic component, wherein at least part of the shielding film includes a nano-conductive fiber and is electrically connected with a ground part of the printed circuit board through the nano-conductive fiber.

First claim

What is claimed is:

1. An electronic device comprising:
a printed circuit board;
at least one electronic component mounted on the printed circuit board; and
a shielding film including a conductive layer and an insulation layer, the shielding film attached to at least a part of the printed circuit board and contacting an upper side surface of the at least one electronic component,
wherein the conductive layer includes a nano-conductive fiber and is electrically connected with a first ground part of the printed circuit board through the nano-conductive fiber,
wherein the insulation layer defines a hole, and
wherein a position of the hole corresponds to a position of the at least one electronic component, such that an upper side surface of the at least one electronic component directly contacts the conductive layer through the hole.

2. The electronic device of claim 1 , wherein the shielding film comprises:
a metal shaping layer that is deformed to at least part of a shape of the at least one electronic component,
the conductive layer on to which the metal shaping layer is directly plated and contacting the metal shaping layer, the conductive layer blocking electromagnetic waves generated from the printed circuit board and/or the at least one electronic component,
the insulation layer disposed below the conductive layer or the metal shaping layer, and disposed above the printed circuit board, the insulation layer electrically insulating the printed circuit board and/or the at least one electronic component.

3. The electronic device of claim 2 , wherein the shielding film is attached to the printed circuit board, and
wherein the at least one electronic component is a heat-producing component.

4. The electronic device of claim 3 , further comprising:
a thermal dissipation material is deposited on an area of the metal shaping layer corresponding to a heat-producing component, and
a heat dissipation plate is disposed on the thermal dissipation material, facilitating dissipation of heat for the heat-producing component through the shielding film, the thermal dissipation material, and the heat dissipation plate.

5. The electronic device of claim 2 , wherein the metal shaping layer is formed of a material that deforms according to a shape of the at least one electronic component on which the shielding film is disposed responsive to an application of heat, and to maintain the deformed shape after termination of the application of heat.

6. The electronic device of claim 2 , wherein the metal shaping layer includes an aluminum thin film.

7. The electronic device of claim 2 , wherein the insulation layer is disposed on the metal shaping layer, and
wherein the insulation layer at least partially thermally insulates the metal shaping layer from the application of heat.

8. The electronic device of claim 1 , wherein the nano-conductive fiber is plated with metal.

9. The electronic device of claim 1 , wherein the conductive layer includes an adhesive layer, the adhesive layer formed using a hot-melting powder that is attached to the first ground part during a hot pressing process.

10. The electronic device of claim 9 , wherein the hot-melting powder is melted at a first temperature, and
wherein the first temperature is less than a second temperature which when applied to the printed circuit board and the at least one electronic component, affects a durability of at least one of the printed circuit board and the at least one electronic component.

11. The electronic device of claim 1 , wherein the insulation layer is formed using a material that stretches in reaction to heat.

12. The electronic device of claim 1 , further comprising a heat dissipation plate is disposed on a top side of the shielding film.

13. The electronic device of claim 12 , wherein a portion of the shielding film overlaps the heat dissipation plate at a position corresponding to a location of the at least one electronic component, such that heat generated by the at least one electronic component is dissipated through the heat dissipation plate.

14. The electronic device of claim 12 , wherein a portion of the shielding film overlaps the heat dissipation plate, and a remaining portion of the shielding film does not overlap the heat dissipation plate.

15. The electronic device of claim 1 , wherein the shielding film defines an empty area formed therein, and
wherein the shielding film is electrically connected with a second ground part disposed around the empty area.

16. A shielding film attached to a printed circuit board having at least one electronic component mounted thereon, the shielding film comprising:
a metal shaping layer that is deformed to at least part of a shape of the at least one electronic component by an application of a pressure;
a conductive layer blocking electromagnetic waves generated from the printed circuit board and/or the at least one electronic component; and
an insulation layer disposed below the conductive layer or the metal shaping layer, and disposed above the printed circuit board, the insulation layer electrically insulating the printed circuit board and/or the at least one electronic component,
wherein the conductive layer includes a nano-conductive fiber and is electrically connected with a ground part of the printed circuit board through the nano-conductive fiber,
wherein the insulation layer defines a hole, and
wherein a position of the hole corresponds to a position of the at least one electronic component, such that an upper side surface of the at least one electronic component directly contacts the conductive layer through the hole.

17. The shielding film of claim 16 , wherein the metal shaping layer is deformed to at least the part of the shape of the at least one electronic component by application of heat, and remains deformed after removal of the application of heat.

18. The shielding film of claim 16 , wherein the metal shaping layer includes an aluminum thin film.

19. The shielding film of claim 16 , wherein the conductive layer includes the nano-conductive fiber and a hot-melting powder, and wherein the conductive layer is coupled to the ground part by a hot pressing process.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Myeonggil
• Park Hyein
• Lim Jaedeok
• Moon Jihye
• Yang Cheehwan
• Yoo Jangsun
• Lee Kwangyong

Classifications

• H05K9/0022 Primary

  of components mounted on printed circuit boards [PCB] (shields integrated within PCB H05K1/0218; shields integrated within component packages H10W42/20) · CPC title

• H05K7/20454

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

• H05K7/20509 Primary

  Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures · CPC title

• H05K9/009

  comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked · CPC title

• H05K9/0088

  comprising a plurality of shielding layers; combining different shielding material structure · CPC title