GRAPHITE LAMINATES, PROCESSES FOR PRODUCING GRAPHITE LAMINATES, STRUCTURAL OBJECT FOR HEAT TRANSPORT, AND ROD-SHAPED HEAT-TRANSPORTING OBJECT

• US 20180023904A1
• Filed: 12/18/2015
• Published: 01/25/2018
• Est. Priority Date: 12/18/2014
• Status: Abandoned Application

• Current Assignee: Kaneka Corporation
• Original Assignee: Kaneka Corporation
• Inventors: Kato, Yusuke, Kutsumizu, Makoto, Nishikawa, Yasushi, Inaba, Keisuke, Sakagami, Michiyasu
• Application Number:
  US15/536,381
• Publication Number:
  US 20180023904A1
• Time in Patent Office: Days
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 2250/42 Alternating layers, e.g. ABAB(C), AABBAABB(C)
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2255/28 Multiple coating on one surface
• CPC Class Codes: B32B 2307/204 Di-electric
• CPC Class Codes: B32B 2307/302 Conductive
• CPC Class Codes: B32B 2307/538 Roughness
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2307/724 Permeability to gases, adsorption
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2307/748 Releasability
• CPC Class Codes: B32B 2309/105 Thickness
• CPC Class Codes: B32B 2457/00 Electrical equipment
• CPC Class Codes: B32B 2597/00 Tubular articles, e.g. hoses, pipes
• CPC Class Codes: B32B 27/28 comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/285 comprising polyethers
• CPC Class Codes: B32B 27/286 comprising polysulphones; polysulfides
• CPC Class Codes: B32B 27/302 comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• CPC Class Codes: B32B 27/304 : comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/306 : comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/308 : comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/322 : comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 27/365 : comprising polycarbonates
• CPC Class Codes: B32B 27/38 : comprising epoxy resins
• CPC Class Codes: B32B 27/40 : comprising polyurethanes
• CPC Class Codes: B32B 27/42 : comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
• CPC Class Codes: B32B 3/26 : characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205; characterised by an apertured layer
• CPC Class Codes: B32B 3/266 : characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B32B 9/00 : Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
• CPC Class Codes: B32B 9/007 : comprising carbon, e.g. graphite, composite carbon
• CPC Class Codes: B32B 9/04 : comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a glass layer B32B17/06; layered products with at least two ceramic layers composed mainly of ceramic B32B18/00
• CPC Class Codes: B32B 9/045 : of synthetic resin
• CPC Class Codes: C01B 32/20 : Graphite
• CPC Class Codes: C01P 2006/32 : Thermal properties
• CPC Class Codes: C09J 2423/04 : Presence of homo or copolymers of ethene
• CPC Class Codes: C09J 2433/00 : Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2467/00 : Presence of polyester
• CPC Class Codes: C09J 2479/08 : polyimide
• CPC Class Codes: C09J 2483/00 : Presence of polysiloxane
• CPC Class Codes: C09J 7/00 : Adhesives in the form of films or foils
• CPC Class Codes: C09K 5/14 : Solid materials, e.g. powdery or granular
• CPC Class Codes: F28F 21/02 : of carbon, e.g. graphite
• CPC Class Codes: H01L 23/3675 : characterised by the shape of the housing
• CPC Class Codes: H01L 23/373 : Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
• CPC Class Codes: H01L 2924/00 : Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 : Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 7/2039 : characterised by the heat transfer by conduction from the heat generating element to a dissipating body arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00
• CPC Class Codes: H05K 7/20445 : the coupling element being an additional piece, e.g. thermal standoff

Abstract

The present invention provides, with use of a particular material, (i) a graphite laminate that has high thermal conductivity and that is unlikely to contain a void, (ii) a graphite laminate that is good in thermal conductivity and peel strength, (iii) methods for producing such graphite laminates, (iv) heat transport structures including such graphite laminates, (v) a rod-shaped heat transporter whose operating temperature is not limited and which can be used stably, and (vi) an electronic device including a rod-shaped heat transporter.

Claims

1-10. -10. (canceled)

11. A graphite laminate, comprising:

graphite sheets; and

adhesive layers,

the graphite sheets and the adhesive layers being disposed alternately on top of each other,

the adhesive layers each containing at least one of a thermoplastic resin and a thermosetting resin,

the adhesive layers each having a water absorption rate of not more than 2% and a thickness of less than 15 μ

m,

the graphite sheets being included in the graphite laminate in a number of not less than 3.

13. The graphite laminate according to claim 11, wherein the thermoplastic resin and the thermosetting resin each have a glass transition point of not lower than 50°

C.

14. The graphite laminate according to claim 11, wherein the graphite sheets each have a thermal conductivity of not less than 1000 W/(m·

K) in a surface direction.

15. The graphite laminate according to claim 11, wherein the graphite laminate is bent so as to have at least one bent portion.

18. The graphite laminate according to claim 11, wherein in a case where (i) one end of the graphite laminate is fixed so that the graphite laminate is horizontal with respect to ground and then (ii) a load is imposed on a cross section of the graphite laminate which cross section is located 4 cm away from the fixed end, the load being 0.7 g per 1 mm² of the cross section, the cross section has a displacement of not more than 15 mm.

19. A heat transport structure, comprising:

a graphite laminate according to claim 11; and

a heat-generating element,

the graphite laminate being connected with a high-temperature site, whose temperature is raised by heat generated by the heat-generating element, and with a low-temperature site, whose temperature is lower than the temperature of the high-temperature site.

12. A graphite laminate, comprising:

graphite sheets; and

adhesive layers,

the graphite sheets and the adhesive layers being disposed alternately on top of each other,

the adhesive layers each containing at least one of a thermoplastic resin and a thermosetting resin,

the adhesive layers each having a thickness of less than 15 μ

m,

the graphite sheets being included in the graphite laminate in a number of not less than 3,

the graphite laminate having a water absorption rate of not more than 0.25%.

32. The graphite laminate according to claim 12, wherein the thermoplastic resin and the thermosetting resin each have a glass transition point of not lower than 50°

C.

33. The graphite laminate according to claim 12, wherein the graphite sheets each have a thermal conductivity of not less than 1000 W/(m·

K) in a surface direction.

34. The graphite laminate according to claim 12, wherein the graphite laminate is bent so as to have at least one bent portion.

35. The graphite laminate according to claim 12, wherein in a case where (i) one end of the graphite laminate is fixed so that the graphite laminate is horizontal with respect to ground and then (ii) a load is imposed on a cross section of the graphite laminate which cross section is located 4 cm away from the fixed end, the load being 0.7 g per 1 mm² of the cross section, the cross section has a displacement of not more than 15 mm.

36. A heat transport structure, comprising:

a graphite laminate according to claim 12; and

a heat-generating element,

the graphite laminate being connected with a high-temperature site, whose temperature is raised by heat generated by the heat-generating element, and with a low-temperature site, whose temperature is lower than the temperature of the high-temperature site.

16. A graphite laminate, comprising:

graphite sheets; and

adhesive layers,

the graphite sheets and the adhesive layers each having a surface defined by an X axis and a Y axis, which is orthogonal to the X axis, the graphite sheets and the adhesive layers being disposed alternately on top of each other in a direction of a Z axis, which is perpendicular to the surface, in such a manner that the respective surfaces of the graphite sheets and the adhesive layers overlap with each other, the graphite laminate being bent so as to have at least two bent portions,

each of the at least two bent portions being one of (a) to (c) below,

(a) a first bent portion, which is formed by bending the graphite laminate in a direction of the X axis or the Y axis,

(b) a second bent portion, which is formed by bending the graphite laminate in the direction of the Z axis, and

(c) a third bent portion, which is formed by bending the graphite laminate in the direction of the X axis or the Y axis and also in the direction of the Z axis.

37. The graphite laminate according to claim 16, wherein in a case where (i) one end of the graphite laminate is fixed so that the graphite laminate is horizontal with respect to ground and then (ii) a load is imposed on a cross section of the graphite laminate which cross section is located 4 cm away from the fixed end, the load being 0.7 g per 1 mm² of the cross section, the cross section has a displacement of not more than 15 mm.

38. A heat transport structure, comprising:

a graphite laminate according to claim 16; and

a heat-generating element,

the graphite laminate being connected with a high-temperature site, whose temperature is raised by heat generated by the heat-generating element, and with a low-temperature site, whose temperature is lower than the temperature of the high-temperature site.

17. A graphite laminate, comprising:

graphite sheets; and

adhesive layers,

the graphite sheets and the adhesive layers each having a surface defined by an X axis and a Y axis, which is orthogonal to the X axis, the graphite sheets and the adhesive layers being disposed alternately on top of each other in a direction of a Z axis, which is perpendicular to the surface, in such a manner that the respective surfaces of the graphite sheets and the adhesive layers overlap with each other,

the graphite laminate being bent so as to have at least one bent portion,

each of the at least one bent portion being (c) below,

(c) a third bent portion, which is formed by bending the graphite laminate in a direction of the X axis or the Y axis and also in the direction of the Z axis.

39. The graphite laminate according to claim 17, wherein in a case where (i) one end of the graphite laminate is fixed so that the graphite laminate is horizontal with respect to ground and then (ii) a load is imposed on a cross section of the graphite laminate which cross section is located 4 cm away from the fixed end, the load being 0.7 g per 1 mm² of the cross section, the cross section has a displacement of not more than 15 mm.

40. A heat transport structure, comprising:

a graphite laminate according to claim 17; and

a heat-generating element,

the graphite laminate being connected with a high-temperature site, whose temperature is raised by heat generated by the heat-generating element, and with a low-temperature site, whose temperature is lower than the temperature of the high-temperature site.

20-25. -25. (canceled)

26. A graphite laminate, comprising:

graphite sheets; and

adhesive layers,

the graphite sheets and the adhesive layers being disposed alternately on top of each other,

the adhesive layers each containing at least one of a thermoplastic resin and a thermosetting resin,

the graphite sheets being included in the graphite laminate in a number of not less than 3,

the graphite sheets and the adhesive layers being in close contact with each other at not less than 50% of an interface therebetween.

27-31. -31. (canceled)