Composite sheet, mounting structure including the composite sheet and electronic apparatus including the mounting structure

Patent metadata

Field	Value
Publication number	US-9604431-B2
Application number	US-201414476742-A
Country	US
Kind code	B2
Filing date	Sep 4, 2014
Priority date	Sep 17, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A composite sheet includes: a graphite layer that is disposed on a high temperature portion; an aerogel layer that is disposed on a low temperature portion; and an adhesive layer to which the graphite layer and the aerogel layer are fixed, in which the adhesive layer is formed of a water-based adhesive. The water-based adhesive layer is formed of an adhesive containing water as a solvent or an adhesive containing water as a raw material. The water-based adhesive layer includes gaps.

First claim

What is claimed is:

1. A composite sheet comprising:
a graphite sheet comprising substantially only graphite;
a silica aerogel layer; and
an adhesive layer fixed to the graphite sheet and the silica aerogel layer between the graphite sheet and the silica aerogel layer,
wherein the adhesive layer is one of an adhesive containing water as a dispersant, an adhesive containing water as a solvent, and an adhesive containing water,
wherein the silica aerogel layer contains a resin fiber sheet and an aerogel, and the adhesive does not enter the aerogel.

2. The composite sheet according to Claim 1 ,
wherein the resin fiber sheet contains nanofibers.

3. The composite sheet according to claim 2 ,
wherein a diameter of the nanofibers is 30 nm or less.

4. The composite sheet according to claim 1 ,
wherein a plurality of graphite sheets are laminated to the adhesive layer.

5. The composite sheet according to claim 1 ,
wherein a plurality of graphite sheets are provided to only a portion of the silica aerogel layer.

6. The composite sheet according to claim 1 ,
wherein an area of the silica aerogel layer is less than an area of the graphite sheet.

7. The composite sheet according to claim 6 ,
wherein side surfaces of the silica aerogel layer are covered with the adhesive layer.

8. The composite sheet according to claim 6 ,
wherein the silica aerogel layer is positioned inside the adhesive layer.

9. The composite sheet according to claim 6 ,
wherein side surfaces of the silica aerogel layer are covered with the adhesive layer,
a top surface of the silica aerogel layer is not covered with the adhesive layer, and
a bottom surface of the silica aerogel layer is covered with the adhesive layer.

10. The composite sheet according to claim 6 ,
wherein side surfaces of the silica aerogel layer are covered with the adhesive layer,
a top surface of the silica aerogel layer is covered with the adhesive layer, and
a bottom surface of the silica aerogel layer is not covered with the adhesive layer.

11. The composite sheet according to claim 6 ,
wherein side surfaces of the silica aerogel layer are covered with the adhesive layer,
a top surface of the silica aerogel layer is not covered with the adhesive layer, and
a bottom surface of the silica aerogel layer is not covered with the adhesive layer.

12. The composite sheet according to claim 6 ,
wherein side surfaces of the silica aerogel layer are covered with the adhesive layer, and
a top surface of the silica aerogel layer has a larger area than that of a bottom surface of the silica aerogel layer.

13. A mounting structure comprising
an electronic component;
a housing; and
the composite sheet according to claim 1 , the composite sheet provided between the electronic component and the housing.

14. A mounting structure comprising
an electronic component;
a housing; and
the composite sheet according to claim 6 , the composite sheet provided between the electronic component and the housing.

15. An electronic apparatus comprising
a substrate;
an electronic component mounted on the substrate;
a housing; and
the composite sheet according to claim 1 , the composite sheet provided between the electronic component and the housing.

16. An electronic apparatus comprising
a substrate;
an electronic component mounted on the substrate;
a housing; and
the composite sheet according to claim 6 , the composite sheet provided between the electronic component and the housing.

17. The composite sheet according to claim 1 ,
wherein a thermal conductivity of the graphite sheet in a parallel direction is 1000 W/mk or higher, and the thermal conductivity of the graphite sheet in a perpendicular direction is 5 W/mk or lower.

18. The composite sheet according to claim 6 ,
wherein a thermal conductivity of the graphite sheet in a parallel direction is 1000 W/mk or higher, and the thermal conductivity of the graphite sheet in a perpendicular direction is 5 W/mk or lower.

19. The composite sheet according to claim 1 , wherein the silica aerogel layer is water-repellent.

20. The composite sheet according to claim 1 , wherein the adhesive layer contains a gap that does not penetrate the adhesive layer and is a closed space.

21. The composite sheet according to claim 1 , wherein the adhesive is a foam-based adhesive.

Assignees

• Panasonic Corp
• Panasonic Ip Man Co Ltd

Inventors

• Sakatani Shigeaki
• Oikawa Kazuma
• Takada Kentaro
• Hisatake Yoichi
• Kohmyohji Daido

Classifications

• H10W40/25

  characterised by their materials · CPC title

• H10W40/10

  Arrangements for heating · CPC title

• B32B2307/304

  Insulating · CPC title

• B32B2307/302

  Conductive · CPC title

• B32B25/045

  of foam · CPC title