Composite sheet and portable terminal having same

• US 9,826,668 B2
• Filed: 12/31/2014
• Issued: 11/21/2017
• Est. Priority Date: 12/31/2013
• Status: Active Grant

• Current Assignee: Amogreentech Co., Ltd.
• Original Assignee: Amogreentech Co., Ltd.
• Inventors: Jang, Kil Jae, Lee, Dong Hoon, Hwang, Seung Jae
• Primary Examiner(s): Haughton, Anthony
• Assistant Examiner(s): Gafur, Razmeen
• Application Number:
  US15/101,631
• Publication Number:
  US 20170034959A1
• Time in Patent Office: 1,056 Days
• Field of Search: 361676-678, 36167946-67954, 361688-723, 165 801- 805, 16510433, 165185, 174 151- 153, 174 161- 163, 174547, 174548, 257712-722, 257E23088, 24453, 24458-459, 454184, 312236
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2262/0276 Polyester fibres
• CPC Class Codes: B32B 2307/302 Conductive
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/702 Amorphous
• CPC Class Codes: B32B 2307/704 Crystalline
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes labels B32B2519/00
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: F16L 59/028 Composition or method of fixing a thermally insulating material
• CPC Class Codes: F16L 59/06 Arrangements using an air layer or vacuum
• CPC Class Codes: F16L 59/10 Bandages or covers for the protection of the insulation, e.g. against the influence of the environment or against mechanical damage integral with the insulation materials F16L59/02
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops
• CPC Class Codes: H01F 1/153 Amorphous metallic alloys, e.g. glassy metals making ferrous amorphous alloys C22C33/003
• CPC Class Codes: H01F 1/16 : in the form of sheets H01F1/147 takes precedence
• CPC Class Codes: H04M 1/02 : Constructional features of telephone sets
• CPC Class Codes: H04M 1/0202 : Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H04M 1/0266 : for a display module assembly
• CPC Class Codes: H05K 5/0017 : with operator interface units
• CPC Class Codes: H05K 5/03 : Covers
• CPC Class Codes: H05K 7/20436 : Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
• CPC Class Codes: H05K 7/20963 : Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20972 takes precedence

Abstract

Provided are a composite sheet and a mobile terminal having the same, in which the composite sheet includes: a first heat insulation member having a plurality of fine pores to form air pockets for thermal insulation; and a second insulation member which is laminated on the first insulation member, and which facilitates a horizontal direction transfer of heat conducted hut suppresses a vertical direction transfer thereof.

Claims

1. A composite sheet comprising:

a first heat insulation member having a plurality of fine pores to form air pockets for thermal insulation;

a second heat insulation member which is laminated on the first heat insulation member, and which facilitates a horizontal direction transfer of heat conducted but suppresses a vertical direction transfer thereof; and

a heat spreader which is laminated between the first insulation member and the second heat insulation member to thus disperse heat,

wherein the first heat insulation member is a nanofiber web or a laminated structure of a nanofiber web and a nonwoven fabric, and the nanofiber web is formed of accumulated nanofibers made by an electrospinning process.

2. The composite sheet of claim 1, wherein the second insulation member comprises a magnetic sheet having a ratio of a horizontal direction thermal conductivity with respect to a vertical direction thermal conductivity of 10:

1 or more.

3. The composite sheet of claim 2, wherein the second insulation member comprises a magnetic sheet having a specific resistivity of at least 100.

4. The composite sheet of claim 2, wherein the magnetic sheet is a Fe-based amorphous alloy or a Co-based amorphous alloy.

5. The composite sheet of claim 4, wherein the Fe-based amorphous alloy is a Fe—

Si—

B alloy or Fe—

Si—

B—

Cu—

Nb alloy.

6. The composite sheet of claim 4, wherein the magnetic sheet is configured to include a plurality of fine pieces which are separated in a fine size and disposed adjacent, and an adhesive member which is attached on any one or either side of upper and lower portions of the magnetic sheet, in which gaps between the plurality of fine pieces are insulated in whole or in part.

7. The composite sheet of claim 1, wherein the heat spreader is a metal thin plate of a thermal conductivity of 200 W/m·

K or more.

8. The composite sheet of claim 7, wherein the metal thin plate is made of Cu or Al.

9. A composite sheet comprising:

a heat spreader which disperses heat and radiates the heat; and

a magnetic sheet which is laminated on the heat spreader and is configured to include a plurality of fine pieces which are separated in a fine size and disposed adjacent, and an adhesive member which is attached on any one or either side of upper and lower portions of the magnetic sheet, in which gaps between the plurality of fine pieces are insulated in whole or in part, to thus secondarily diffuse heat conducted from the heat spreader and suppress a vertical direction transfer of the heat.

10. The composite sheet of claim 9, wherein the magnetic sheet is formed of an amorphous alloy or a nanocrystalline alloy.

11. The composite sheet of claim 9, wherein the magnetic sheet has a ratio of a horizontal direction thermal conductivity with respect to a vertical direction thermal conductivity of 10:

1.

12. The composite sheet of claim 9, wherein the magnetic sheet has a specific resistivity of at least 100.

13. The composite sheet of claim 9, wherein the heat spreader is a metal thin plate of a thermal conductivity of 200 W/m·

K or more.

14. The composite sheet of claim 13, wherein the metal thin plate is made of Cu or Al.

15. The composite sheet of claim 9, wherein thickness of the magnetic sheet is 5 μ

m to 50 μ

m.

16. A mobile terminal comprising:

a terminal main body;

a removable rear cover on a rear surface of the terminal main body;

a display unit which is exposed to the terminal main body; and

a composite sheet adhered to an inner side of the rear cover or a rear surface of the display unit, wherein the composite sheet comprises;

a heat spreader which disperses heat and radiates the heat; and

a magnetic sheet which is laminated on the heat spreader and is configured to include a plurality of fine pieces which are separated in a fine size and disposed adjacent, and an adhesive member which is attached on any one or either side of upper and lower portions of the magnetic sheet, in which gaps between the plurality of fine pieces are insulated in whole or in part, to thus secondarily diffuse heat conducted from the heat spreader and suppress a vertical direction transfer of the heat.

17. The mobile terminal of claim 16, wherein the heat spreader is a Cu or a Al sheet, and the magnetic sheet is formed of an amorphous alloy or a nanocrystalline alloy.