Skived-fin annular heat sink
A skived-fin annular heat sink is manufactured via a skived-fin technology and includes at least one bottom board and a plurality of fins. The at least one bottom board is bended to form a closed-shaped. The fins are extended outwardly from the at least one bottom board, wherein each of the fins has a bending portion for connecting the fin with the bottom board. Hence the skived-fin annular heat sink can be adapted to a chip of PCB with over limited space, and can used to increase the number of fins for increasing the heat-dissipating area between the chip and the heat sink.
1. Field of the Invention
The present invention relates to a skived-fin annular heat sink, and particularly relates to an erect skived-fin annular heat sink manufactured via a skived-fin technology
2. Description of the Related Art
According to the increase of IC density, too much heat is resulted from chip operation in the information product. Hence the temperature of the chip such as CPU usually exceeds supportable temperature, and the chip and some components near the chip are damaged.
In order to solve the heat-dissipating problem for chips, many users put a heat sink with a plurality of fins on the chip. The heat sink mainly includes an erect rectangular heat sink or an erect annular heat sink. The annular heat sink is usually used to dispose on chips of a PCB, such as interface card. The annular heat sink is manufactured via extrusion, forging, stamping, machine process, powder forming or press forming. However, the fin density is limited by the above-mentioned process method. Hence the number of fins (is about 100 pieces) is hard to be increased and the thickness of the fins cannot be too thin by the above-mentioned process method.
For example, an extruded annular heat sink is usually made of aluminum materials. A process for manufacturing the extruded annular heat sink includes: melting the aluminum materials and extruding the extruded annular heat sink with same cross-sectional shape via an extruded tool.
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Another way to manufacture the annular heat sink is to bond or weld the fins on the bottom board. Although the above-mentioned method can increase the number of fins and the heat-dissipating area, the fins do not connect directly with the bottom board. Hence the heat-dissipating effect of the heat sink is decreased.
SUMMARY OF THE INVENTIONThe present invention provides a skived-fin annular heat sink to increase the number of fins for increasing the heat-dissipating area between a chip and the heat sink. Moreover the skived-fin annular heat sink can be adapted to on a chip of PCB with over limited space.
One aspect of the invention is a skived-fin annular heat sink. The skived-fin annular heat sink is manufactured via a skived-fin technology and includes at least one bottom board and a plurality of fins. The at least one bottom board is bended to form a closed-shaped; and the fins are extended outwardly from the at least one bottom board, wherein each of the fins has a bending portion for connecting the fin with the bottom board.
It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the invention as claimed. Other advantages and features of the invention will be apparent from the following description, drawings and claims.
BRIEF DESCRIPTION OF THE DRAWINGSThe various objectives and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which:
Because of the skived-fin heat sink is manufactured by a skived-fin process, the skived-fin heat sink can be made of an aluminum material, an aluminum alloy, a copper or a copper alloy. In the best mold, the skived-fin heat sink 44 is a rectangular shape. However, the shape is not used to limit the present invention.
A heat-conducting block 5a is received in a center portion of the skived-fin heat sink 4a. The heat-conducting block 5a has an exposed bottom edge 52a extended outside the skived-fin heat sink 4a for abutting against a bottom side of the bottom board 42a. Hence, the exposed bottom edge 52a can provide a larger heat-conducting area for increasing the heat-dissipating effect between the heat-conducting block 5a and the skived-fin heat sink 4a.
Conclusion, the present invention has some advantages, as following:
1. The skived-fin annular heat sink of the present invention has a plurality of sheet-shaped fins more than that of the prior art and a bottom board connected with a center portion thereof for increasing more heat-dissipating area and good heat-dissipating effect;
2. The skived-fin annular heat sink can be made of an aluminum material, an aluminum alloy, a copper or a copper alloy easily; and
3. The skived-fin annular heat sink can be adapted to a chip of PCB with over limited space, such as chips on an interface card. Moreover, a fan can be disposed on the skived-fin annular heat sink for increasing heat-dissipating effect.
Although the present invention has been described with reference to the preferred embodiments thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
Claims
1. A skived-fin annular heat sink manufactured via a skived-fin technology, comprising:
- at least one bottom board bended to form a closed-shaped; and
- a plurality of fins extended outwardly from the at least one bottom board, wherein each of the fins has a bending portion for connecting the fin with the bottom board.
2. The skived-fin annular heat sink as claimed in claim 1, wherein the bottom board and the fins are made of copper or copper alloy materials.
3. The skived-fin annular heat sink as claimed in claim 1, wherein the bottom board and the fins are made of aluminum material and aluminum alloy materials.
4. The skived-fin annular heat sink as claimed in claim 1, wherein the closed-shaped bottom board is formed via two semicircular bottom board or a plurality of fan-shaped bottom board assembled together.
5. The skived-fin annular heat sink as claimed in claim 4, further comprising at least one connecting component for connecting every two adjacent semicircular bottom boards or fan-shaped bottom board.
6. The skived-fin annular heat sink as claimed in claim 1, wherein the at least one bottom board is bended to form the closed-shaped via a welding.
7. The skived-fin annular heat sink as claimed in claim 1, wherein the bottom board is an erect closed cylinder.
8. The skived-fin annular heat sink as claimed in claim 1, wherein the bottom board is an erect closed rectangle.
9. The skived-fin annular heat sink as claimed in claim 1, wherein the fins are arranged to form a rectangular or trapezoid shape.
10. The skived-fin annular heat sink as claimed in claim 1, further comprising a heat-conducting block disposed in a center portion of the bottom board.
11. The skived-fin annular heat sink as claimed in claim 10, wherein the heat-conducting block has a trapezoid-shaped cross-sectional.
12. The skived-fin annular heat sink as claimed in claim 1, wherein the fins are arranged obliquely on the bottom board, and each of the fins has an upward and oblique angle formed on a bottom side thereof.
13. The skived-fin annular heat sink as claimed in claim 1, wherein the fins are arranged spirally on the bottom board.
Type: Application
Filed: May 5, 2005
Publication Date: Nov 24, 2005
Inventor: Liang-Fu Huang (Hsinchuang City)
Application Number: 11/122,029