TWI260245B - Heat sink and method of manufacture - Google Patents

Abstract

A heat sink includes a base and a plurality of fins. A plurality of grooves is parallely defined in one side of the base. Each fin includes a heat dissipating section and an engaging section bent from a bottom of the heat dissipating section and interferentially engaged with a corresponding groove. A method of manufacture of the heat sink includes following steps: providing a base, having a plurality of grooves defined in a side thereof; providing a plurality of fins, each including a heat dissipating section and an engaging section bent from a bottom of the heat dissipating section; pressing the engaging section of each fin along a direction parallel to the base in order to make the engaging sections interferentially engaged with the grooves.

Description

...the technical field of the month] The method, deduction and crying, the other is about - and its manufacturing method processor and so on, its & 屯 屯 元件 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座 基座The thinner the table, the better, the quantity, you * day plus the political heat device f-type manufacturing, so the heat dissipation performance is extremely exposed - the heat sink type on the welding type of heat, the base heat Jie' due to the heat sink and the earth Increasing the heat dissipation of the heat sink 1 is transmitted from the base to the seat. A welding method is used. A diffuser heat sink is provided with a plurality of heat sinks on the side surface of the heat sink, and adjacent plug-in type i ^:Ϊ: in: a kind of heat sink and its manufacture. , the electronic parts of the heat-dissipating welding-free dispersion [Prior Art] processing capacity ^, the i industry is developing rapidly, the central heat exchanger is also right ^ enhanced heat generated by the number of T-cut improved. It is well known that the larger the equivalent area and the larger the heat sink, the better the heat dissipation effect. Theoretically, the surface area of the heat dissipation, the heat sink on the unit base area, and the heat sheet and the thin heat sheet are not easy to form integrally. The combination of the four methods is to improve the heat sink. Second, the Continental Patent Publication No. 2 5 34773 discloses that the base and the heat exchanger comprise a base and are disposed on the base base 5 = by welding. The heat-dissipating area heat sheet can be made thinner than the thin one--the heat resistance of the chip interface is large, which is not conducive to the heat dissipation effect of the socket, and the heat sink and the base 5 are not conducive to mass production. Xinminguo Patent Announcement No. 3 5 3 5 1 6 discloses Pingyi = base and a set of heat sinks. The base ^ 仃 /, the side edge of the slot, each slot is set

BHII Η Page 5 19^0945 V. INSTRUCTIONS (2) When a groove is formed between the grooves, the heat is made thinner to increase the joint, and the heat dissipation to the heat sink is large, the manufacturing difficulty is The above-mentioned commonly used, under-heating area-dissipating device has become anxious. [The present invention is not provided for welding. The invention has a plurality of bent sides of the invention. The pedestal heat sink includes parallel pedestals. A V-shaped groove is formed in the groove and between the groove portions, and every other groove portion is provided for central punching to be deformed and opened to be squeezed into the slot on both sides of the groove portion. The heat sink of the heat sink can also make a large heat dissipation area, but the heat sink is in a manner of being pressed and the contact area between the base sheet and the base is small, and the heat is not transmitted from the base to affect the heat dissipation effect. On the other hand, When the fin density and the height of the stamped V-shaped plate are easily interfered with the heat sink, the cost is increased. The heat dissipation effect of the heat device is enhanced, so that the heat dissipation surface area of the heat sink is large, and the heat sink manufacturing should be easy to manufacture and low in cost, and the heat exchanger has its shortcomings. To this end, how to provide a large, low thermal resistance of the interface, easy to manufacture, and low cost to solve the problem of heat dissipation. The purpose of the invention is to provide a heat exchanger with a simple process and a good heat dissipation effect and a method of manufacturing the same. The heat sink includes a base and a plurality of heat sinks. The pedestal is engaged with the groove, and the heat sink includes a heat dissipating portion and a joint portion from the bottom end of the heat dissipating portion, and the engaging portion interferes with the engaging groove. The method for manufacturing a heat sink includes the steps of: providing a plurality of joint grooves on one side; providing a plurality of heat sinks, each heat sink portion and a joint portion bent from a bottom end of the heat sink portion; the direction stamping heat sink The joint portion allows the joint portion to be placed in the joint groove interference fit.

19^0945 V. Inventive Description (3) Compared with the prior art, the heat sink of the heat sink of the present invention is sequentially fixed to the base by punching in a direction parallel to the base, so that no interference occurs between the heat sink and the mold. Therefore, the manufacturing difficulty is reduced; on the other hand, the heat sink of the heat sink of the present invention is interfered with the base to avoid the problem of large thermal resistance of the soldering intermediate surface, and has better heat dissipation effect. [Embodiment] Referring to the first embodiment of the heat sink of the present invention shown in the first to third figures, the heat sink includes a plurality of heat sinks 10 and a base 20, and the heat sink 10 and the base 2 0 is made of stamped metal material with good thermal conductivity. Each of the heat sinks 10 includes a heat dissipating portion 1 1 and a joint portion 1 which is bent from a bottom end of the heat dissipating portion 11. 2. In this embodiment, the cross section of the joint portion 12 is slightly trapezoidal, including three. The mating surface, that is, the surface 13 , the front end surface 15 and the bottom surface 14 at an angle to the heat dissipating portion 11 , wherein the front end surface 15 can be both a flat surface and a curved surface; the base 20 0 side is provided with a plurality of parallel joints The slot 2 2 has an opening direction parallel to the base 20 and has a cross-sectional shape similar to the cross-sectional shape of the joint portion 12 of the heat sink 10, and includes an upper surface 23 and a front end surface. 2 4 and the bottom surface 2 1 three mating surfaces, after the stamping, the three mating surfaces respectively interfere with the three mating surfaces of the fins 10, and the fins 10 are fixed to the base 20 by metal plastic deformation. Wherein, the bottom faces 14, 21 can be formed with a slightly inclined beak surface, and the guiding action is advantageous for the engaging portion 1 2 of the fins 10 to be engaged with the engaging grooves 22 of the base 20. The cross-sectional shape of the joint portion 1 of the heat sink 10 of the heat sink of the present invention is not limited to a trapezoidal shape, and may be other shapes such as a rectangle or a triangle. Accordingly, the joint groove 2 of the base 20 should be made. Forming a similar cross with the joint 1 2

Page 7 T260245_ V. INSTRUCTIONS (4) Structure of the section. As shown in the fourth and fifth figures, the joint portion 1 2 of the heat sink 10 of the heat sink of the present invention has two other configurations. The heat sink of the present invention is provided by providing a base 20 with a plurality of engaging grooves 2 2 on the side, the engaging groove 2 2 including a plurality of mating surfaces, the opening direction thereof and the base 2 0 is slightly parallel; a plurality of heat sinks 10 are provided, each heat sink 10 has a heat dissipating portion 1 1 and a joint portion 1 2 bent from a bottom end of the heat dissipating portion 1 1 ; a heat sink 10 is disposed on The joint portion 12 of the heat sink 10 is punched in the parallel base 20 direction on the base 20, and the joint portion 12 is received in the joint groove 2 2 and interferes with the joint groove 2 2 , thereby The heat sink 10 is integrally joined to the base 2 Q. According to the above steps, the plurality of heat sinks 10 are sequentially mounted on the susceptor 2 (the cymbal to form the heat sink of the present invention. As described, the heat sink of the present invention, the heat sink 1, 0 and the pedestal 2 0 Separately manufactured, the heat sink 10 can be made thinner, thereby greatly increasing the heat dissipation area; the heat sink 10 is sequentially fixed to the base 20 by punching in a direction parallel to the base, so that the heat sink 10 and the mold do not occur. Interference, thereby reducing the manufacturing difficulty, and the interference between the joint portion 1 2 of the heat sink 10 and the joint groove 2 2 of the base 20 has a large mating surface, and the contact area between the heat sink 10 and the base 20 is large, not only The heat dissipation of the interface is effectively reduced and the heat is transferred from the susceptor 20 to the heat sink. Therefore, the heat sink of the invention and the manufacturing method thereof can overcome the shortcomings of the conventional heat sink, and can provide a large heat dissipation area and interface thermal resistance. A small, easy-to-manufacture, low-cost heat sink. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above is only a preferred embodiment of the present invention.

5. Inventive Note (5), it is not possible to limit the scope of patent application in this case. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included in the scope of the following claims.

Page 9 19^0945 Brief description of the drawings [Simplified description of the drawings] The first figure is a schematic view of the stamping joint of the heat sink and the base of the present invention. The second figure is a schematic view of the heat sink and the base of the present invention after press bonding. The third drawing is a front view of the first embodiment of the heat sink of the present invention. The fourth drawing is a side view of a second embodiment of the heat sink of the heat sink of the present invention. Figure 5 is a side elevational view of a third embodiment of a heat sink for a heat sink of the present invention. [Component Symbol Description]

Heat sink 10 Heat sink Joint part 12 Upper surface Bottom surface 14, 21 Front end face Base 20 Engagement groove

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Claims (1)

19^0945_ VI. Patent Application Range 1. A method for manufacturing a heat sink, comprising the following steps: _ providing a base having a plurality of joint grooves on one side thereof; - providing a plurality of heat sinks, each heat sink including one a heat dissipating portion and a joint portion bent from a bottom end of the heat dissipating portion; and a joint portion of the fins being punched in a direction parallel to the base, so that the joint portion is received in the joint groove and interferes with the joint groove. 2. The method of manufacturing a heat sink according to claim 1, wherein the joint groove of the heat sink and the joint groove of the base have a trapezoidal cross section. 3. The method of manufacturing a heat sink according to claim 1, wherein the joint groove of the heat sink and the joint groove of the base have a rectangular cross section. __ 4. The method for manufacturing a heat sink according to claim 1, wherein a cross section of the joint portion of the diffuser/hot sheet and the base is triangular, and the cross section is triangular 〇5. The method of manufacturing a heat sink according to the invention, wherein the opening direction of the engaging groove is parallel to the base. 6. A heat sink comprising: a base having a plurality of engagement grooves on one side thereof; and a plurality of heat sinks, each heat sink including a heat dissipation portion and a joint portion bent from a bottom end of the heat dissipation portion The joint portion is in interference fit with the engagement groove. 7. The heat sink of claim 6, wherein the junction of the heat sink is perpendicular to the heat sink, and the opening direction of the joint groove is parallel to the base. 8. The heat sink according to claim 6, wherein the joint groove of the heat sink and the joint groove of the base have a trapezoidal cross section. </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The heat sink of claim 6, wherein the joint portion of the heat sink and the base have a triangular cross section. Page 12