Heat dissipating component using high conducting inserts
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F28F-007/00
출원번호
US-0015459
(2001-12-13)
발명자
/ 주소
Krassowski, Daniel W.
Chen, Gary G.
출원인 / 주소
Advanced Energy Technology Inc.
대리인 / 주소
Waddey & Patterson
인용정보
피인용 횟수 :
61인용 특허 :
20
초록▼
A thermal management system provides a heat dissipating component using a high thermal conductivity insert. The heat dissipating component may be a spreader or heat sink, and includes a planar graphite member having high thermal conductivity along the plane of the member and having a relatively low
A thermal management system provides a heat dissipating component using a high thermal conductivity insert. The heat dissipating component may be a spreader or heat sink, and includes a planar graphite member having high thermal conductivity along the plane of the member and having a relatively low thermal conductivity through the thickness of the member. A cavity is formed through the thickness of the member and the high conductivity insert is received in the cavity. The insert may be an isotropic high thermal conductivity material such as copper or an anisotropic material such as graphite oriented to have high conductivity in the direction of the thickness of the planar element.
대표청구항▼
1. A thermal management system, comprising:an anisotropic graphite planar element comprising compressed particles of exfoliated graphite having a relatively high thermal conductivity in the plane of the planar element and having a relatively low thermal conductivity across a thickness of the planar
1. A thermal management system, comprising:an anisotropic graphite planar element comprising compressed particles of exfoliated graphite having a relatively high thermal conductivity in the plane of the planar element and having a relatively low thermal conductivity across a thickness of the planar element in a direction normal to the plane of the planar element, the planar element having a cavity defined therein; anda core closely received in the cavity, the core being constructed of an isotropic core material so that heat from a heat source can be conducted via the core into the thickness of the planar element and then out across the plane of the planar element. 2. The system of claim 1, wherein the planar element is shrink fit with the core by thermal expansion and contraction of at least one of the planar element and the core. 3. The system of claim 1, further comprising:a lubricant layer between the core and the cavity of the planar element, so that the lubricant layer provides a thermal interface between the core and the planar element. 4. The system of claim 1, wherein:the planar element Comprises a plurality of anisotropic sheets of compressed particles of exfoliated graphite laminated together, the sheets being oriented parallel to the plane of the planar element. 5. The system of claim 4, wherein the sheets are resin impregnated. 6. The system of claim 4, wherein the core extends completely through the laminated sheets. 7. The system of claim 1, wherein the core material is a metal. 8. The system of claim 1, wherein the core material comprises copper. 9. The system of claim 1, wherein the core is a cylindrical shaped core having a cylindrical axis oriented normal to the plane of the planar element. 10. The system of claim 1, further comprising:a heat source having a heat conducting area defined thereon in contact with the core. 11. The system of claim 10, wherein:the heat conducting area of the heat source is a top surface of the heat source andthe entire top surface of the heat source is covered by and in contact with the core. 12. The system of claim 1, wherein the system is a heat spreader. 13. The system of claim 1, wherein the system is a heat sink. 14. A thermal management system, comprising:a heat source having a heat transmitting surface;an anisotropic planar element comprising compressed particles of exfoliated graphite, said element having x and y dimensions defining a generally planar extent of the planar element and having a z dimension defining a thickness of the planar element, the planar element having a relatively high thermal conductivity in the x and y directions and a relatively low thermal conductivity in the z direction, the planar element having a cavity defined therein extending at least partially through the thickness of the planar element; andan insert received in the cavity in heat conducting engagement with the planar element, the insert having a heat receiving surface operatively engaging the heat transmitting surface of the heat source, so that heat from the heat source flow across the heat transmitting surface and the heat receiving surface, into the insert in the z direction and then out through the planar element in the x and y directions. 15. The system of claim 14, wherein:the heat transmitting surface of the heat source is entirely covered by the heat receiving surface of the insert. 16. The system of claim 14, wherein:the insert is constructed from an isotropic material. 17. The system of claim 16, wherein the isotropic material of the insert is copper. 18. The system of claim 14, wherein:the insert is constructed from an anisotropic material. 19. The system of claim 14, wherein:the cavity and the insert both extend completely through the thickness of the planar element. 20. The system of claim 14, wherein:the cavity and the insert both extend partially through the thickness of the planar element. 21. The system of claim 14, wherein:the planar element comprises a plurality of shee ts of compressed particles of exfoliated graphite laminated together. 22. The system of claim 21, wherein:the sheets are resin impregnated. 23. A method of dissipating heat from a heat source, comprising:(a) providing an anisotropic heat dissipating element comprising compressed particles of exfoliated graphite having relatively high thermal conductivity in x and y directions, and having relatively low thermal conductivity in a z direction perpendicular to the x and y directions, the heat dissipating element having a cavity defined therethrough in the z direction, and having an isotropic heat conducting insert disposed in the cavity;(b) placing the insert in heat conducting relationship with a heat source;(c) conducting heat from the heat source through the insert and into the anisotropic heat dissipating element; and(d) conducting heat through the heat dissipating element in the x and y directions.
Reis, Bradley E.; Smalc, Martin David; Laser, Brian J.; Kostyak, Gary Stephen; Skandakumaran, Prathib; Getz, Matthew G.; Frastaci, Michael, Cycling LED heat spreader.
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