Abstract:
This invention discloses a manufacturing method and the structure for a heat sink fin. This heat sink fin structure includes an attachment and a plurality of heat sink fins. The plurality of heat sink fins is often used in conducting the waste heat from a chip. The plurality of heat sink fins and the attachment can be made of a special thermal conduction material, including the metal and a bracket structure of carbon element which have high thermal conductivity, so as to improve the efficiency of heat conduction. The corresponding manufacturing method for this thermal conduction material can be made with chemical vapor deposition, physical vapor deposition, electroplating or the other materials preparation method. The bracket structure of carbon element can be coated on a metal surface and can be mixed into the metal.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to a heat sink fin structure and corresponding manufacturing method and, more particularly, to a manufacturing method of making a heat conduction material having a metal and a bracket structure of carbon element.  
       BACKGROUND OF THE INVENTION  
       [0002]     In recent years, the pace of high technology industry development is extremely fast, the development of electronic components is toward small volumes and high densities. The performance requirements for the aforesaid components also increase that generates much waste heat. The efficiency of the electronic components will be decreased if the waste heat is unable to eliminate appropriately. Therefore, various heat conduction materials are provided to improve the efficiency of heat dissipation.  
         [0003]     In the prior art, the material applying in the heat dissipation structure usually includes aluminum to be the tendency of current heat dissipation technology. Traditionally, aluminum applying in the heat dissipation material is restricted due to high temperature conduction produced by the fast development of chips that causes a bottleneck. Copper applying in the heat dissipation technology is then provided. However, copper has a higher specific gravity that has disadvantage to shape and the application is restricted. Although both copper and aluminum are used for air cooling to implement heat dissipation, the air cooling incorporating the aforesaid copper and aluminum will be unable to satisfy the demand for heat dissipating when the heat release of chips achieves 50 W/cm 2 . Therefore, the high efficiency of heat dissipation materials is needed. A conventional heat dissipation structure for electronic components is described as follows.  
         [0004]     Referring to  FIG. 1 , a schematic diagram illustrates a conventional heat dissipation structure for an electronic component. A plurality of heat sink fins  11  can be made by copper or aluminum and has a bottom plane  111  that is bound to a heat contact layer  12 . The heat contact layer  12  is made by aluminum and is bound to an upper plane  141  of a chip  14 . The waste heat caused by high temperature, which is generated from the operation of the chip  14 , is conducted to the plurality of heat sink fins  11  via the heat contact layer  12 . An air stream produce device  13  is set on a plurality of top edges  112  of the plurality of heat sink fins  11 . The plurality of top edges  112  is composed of each top edge which corresponds to each hemline of each fin of the plurality of heat sink fins  11 . The air stream produce device  13  is a fan. An air stream produced by the rotating of the air stream produce device  13  is brought to the plurality of heat sink fins  11 , so as to discharge the waste heat. Moreover, the temperature of the electronic component can also be decreased.  
         [0005]     Besides, diamonds are well known and have characteristics with the highest hardness, the fastest heat conduction, and the widest refraction range in current materials. Diamonds, therefore, are always one of more important materials in engineering due to the excellent characteristics. The thermal conductivity of diamonds at the normal atmospheric temperature is five times more than copper. Moreover, the thermal expansion factor of diamonds at high temperature is very small that shows the excellent efficiency for heat dissipating. The feature may help people to differentiate the adulteration of diamonds. In the prior art, many technologies and manufacture procedures have been developed to make diamonds. The direct decomposition for hydrocarbons is the most familiar method like Microwave Plasma Enhance Chemical Vapor Deposition (MPCVD) and Hot Filament CVD (HFCVD). By the aforesaid methods, polycrystalline diamond films can be deposited. The characteristic of the polycrystalline diamond films is same as the single crystal diamonds.  
       SUMMARY OF THE INVENTION  
       [0006]     Briefly, to eliminate the waste heat generated by electronic components efficiently and to face the development tendency of electronic components with small volumes and high densities, the object of the present invention is to provide a heat conduction material which is applied for a chip to dissipate the waste heat, so as to improve the efficiency of heat dissipation. Moreover, the heat conduction material provided by the present invention is not only restricted to apply for the chip, but is also applied for other heat conduction appliances.  
         [0007]     In accordance with the present invention a heat conduction material is applied to a heat sink fin that combines a metal with a bracket structure of carbon element. The metal is copper or aluminum or other metals with high thermal conductivity and the bracket structure of carbon element is diamonds. The bracket structure of carbon element can be coated on a surface of the metal or can be mixed into the metal. The heat conduction material can be made by chemical vapor deposition (CVD), physical vapor deposition (PVD), melting or other material preparations.  
         [0008]     Other features and advantages of the present invention and variations thereof will become apparent from the following description, drawings, and claims. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0009]      FIG. 1  is a schematic diagram illustrating a conventional heat dissipation structure for an electronic component;  
         [0010]      FIG. 2  is a schematic diagram illustrating a heat sink fin structure according to an embodiment of the present invention;  
         [0011]      FIG. 3  is a schematic diagram illustrating another heat sink fin structure according to an embodiment of the present invention;  
         [0012]      FIG. 4  is a schematic diagram illustrating a die for making a heat sink fin structure according to  FIG. 2 ;  
         [0013]      FIG. 5  is a cross-sectional view illustrating a die for making another heat sink fin structure according to  FIG. 3 ;  
         [0014]      FIG. 6  is a schematic diagram illustrating microwave plasma enhanced chemical vapor deposition for manufacturing a heat dissipation structure according to an embodiment of the present invention; and  
         [0015]      FIG. 7  is a schematic diagram illustrating ion beam sputtering for manufacturing a heat sink fin structure according to another embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0016]     Referring to  FIG. 2 , a schematic illustrates a heat sink fin structure according to an embodiment of the present invention. The heat sink fin structure comprises a plurality of heat sink fins  21  and an attachment  22 . The operation of the heat sink fin structure is like the prior art. A heat conduction material combining a metal with a bracket structure of carbon element is made to be the material for the plurality of heat sink fins  21  and the attachment  22 . The attachment  22  has an upper surface  221  and a lower surface  222  which corresponds to the upper surface  221 . A connection edge  212  is composed of a hemline of each fin of the plurality of heat sink fins  21  and is connected to a plane  221  of the attachment  22 . Each fin is set to be a side by side arrangement and is vertically connected to the plane  221  of the attachment  22 . Moreover, the attachment  22  has a lower plane  222  which corresponds to the plane  221  and the lower plane  222  is bound to the lower plane  141  of said chip  14  as shown in  FIG. 1 . The plurality of heat sink fins  21  has a plurality of top edges  211  which corresponds to the connection hemline of each fin of the plurality of heat sink fin  21 . Therefore, an air inlet  213  and an air outlet  214  are composed of the plurality of heat sink fins  21 , the plane  221  of the attachment  22  and the plurality of top edges  211  as shown in scopes marked by dashed lines. The air stream produce device  13  as shown in  FIG. 1  can be set on the plurality of top edges  211 . The heat conduction is that the lower plane  222  of the attachment  22  is bound to the upper plane  141  of the chip  14  as shown in  FIG. 1 . The waste heat caused by high temperature, which is generated from the operation of the chip  14 , is conducted to the plurality of heat sink fins  21  and the attachment  22  for absorbing the waste heat. The plurality of heat sink fins  21  and the attachment  22  are composed of combining a metal with a bracket structure of carbon element. The bracket structure of carbon element is diamonds and the metal can be aluminum alloy or copper or other metals with high thermal conductivity or metal combinations. Air stream generated by the rotating of the air stream produce device  13  further enters the air inlet  212  to eliminate the waste heat which has been conducted to the plurality of heat sink fins  21  and lastly, the waste heat is discharged to the outside from the air outlet  213  of the plurality of heat sink fins  21 .  
         [0017]     Referring to  FIG. 3 , a schematic diagram illustrates another heat sink fin structure according to an embodiment of the present invention. The heat sink fin structure comprises a plurality of heat sink fins  31  and an attachment  32 . The heat dissipation of the heat sink fin structure is described as the prior art. A heat conduction material combining a metal with a bracket structure of carbon element is made to be a material for the plurality of heat sink fins  31  and the attachment  32 . The attachment  32  is a post which is hollow without adding any stuff. A side of the host has a circular plane as a scope marked by dashed lines. The circular plane is a heat conduction end  321  and is vertically connected to an outside wall  323  of the post. The heat conduction end  321  is bound to the upper plane  141  of the chip  14  as shown in  FIG. 1 . A circumference  322  is formed from another side which corresponds to the heat conduction end  321  of the post. Therefore, the air stream produce device  13  as shown in  FIG. 1  can be set on the circumference  322 , a plurality of top edges  311 . The plurality of top edges  311  is formed by each top edge of each fin of the plurality of heat sink fins  31 . Each fin of the plurality of heat sink fins  31  has a connection side edge  312  for connecting the outside wall  323  of the attachment  32 . A predetermined arrangement for each fin is to form a radial arrangement which is around the outside wall  323  of the attachment  32 . The heat conduction is that the heat conduction end  321  of the attachment  32  is bound to the upper plane  141  of the chip as shown in  FIG. 1 . The waste heat caused by high temperature, which is generated from the operation of the chip  14 , is conducted to the plurality of heat sink fins  31  and the attachment for absorbing the waste heat. The plurality of heat sink fins  31  and the attachment  32  are composed of combining a metal and a bracket structure of carbon element. The bracket structure of carbon element is diamonds and the metal can be aluminum alloy or copper or other metals with high thermal conductivity or metal combinations. Air stream generated by the rotating of the air stream produce device  13  further enters the plurality of heat sink fins  31  and the attachment  32  and lastly, the waste heat is discharged to the outside from the plurality of heat sink fins  31 .  
         [0018]     Referring to  FIG. 4 , a schematic diagram illustrates a die for making a heat sink fin structure according to  FIG. 2 . The heat sink fin structure comprises the plurality of heat sink fins  21  and the attachment  22 . The die comprises a mold material supplier  41 , a mold material injector  42  and a mold  43 . A mold material is injected by the mold material injector  42  to a cavity  44  of the mold  43  for molding. The mold material is then formed to be the heat sink fin structure as shown  FIG. 2  and the heat sink fin structure comprises the plurality of heat sink fins  21  and the attachment  22 . The attachment  22  has the upper plane  221  and the lower plane  22 . The upper plane  221  is connected to the plurality of heat sink fins  21 . The mold material can be a melt material which combines a metal with a bracket structure of carbon element. The metal is copper or aluminum or silver or other metals with high thermal conductivity or other material combinations. The melting point of the bracket structure of carbon element is higher than any metal of the mentioned above. Therefore, the bracket structure of carbon element can be mixed into those metals.  
         [0019]     Referring to  FIG. 5 , a cross-sectional view illustrates a die for making another heat sink fin structure according to  FIG. 3 . The heat sink fin structure comprises the plurality of heat sink fin  31  and the attachment  32 . A die as shown in  FIG. 4  comprises a mold material supplier  41 , a mold material injector  42  and a mold  51  which is used to form the plurality of heat sink fins  31  and the attachment  32 . A mold material is injected by the mold material injector  42  to a cavity  52  of the mold  51  for molding. The mold material is then formed to be the heat sink fin structure as shown  FIG. 3  and the heat sink fin structure comprises the plurality of heat sink fins  31  and the attachment  32 . The attachment  22  is the post and the circular plane is extended from the side of the post to form the heat conduction end  321  as shown in  FIG. 3 . Furthermore, the plurality of heat sink fins  31  is connected to the outside wall of the attachment  32 . The mold material can be a melt material which combines a metal with a bracket structure of carbon element. The metal is copper or aluminum or silver or other metals with high thermal conductivity or other material combinations. The melting point of the bracket structure of carbon element is higher than any metal of the mentioned above. Therefore, the bracket structure of carbon element can be mixed into those metals to form the mold material.  
         [0020]     In addition, the heat conduction material having the bracket structure of carbon element can be formed on a metal surface by using CVD or PVD. Referring to  FIG. 6 , a schematic diagram illustrates microwave plasma enhanced chemical vapor deposition for manufacturing a heat dissipation structure according to an embodiment of the present invention. In the embodiment, the reaction procedure is that a mixed gas for desired reaction is delivered to a gas reaction room  66  from a gas entrance  61 . At the same time, a microwave is generated by a microwave generation system  62  to activate the mixed gas in order to provide reactive ions for reacting. A surface of a metal material  65  on a carrier  64  is absorbed to form diamond films. The metal material  65  can be copper or aluminum or silver or other metals with high thermal conductivity or other metal combinations. Remaining gas is discharged via a waste gas exit  63 . By the way mentioned above, a heat conduction material coating diamond particles can be acquired and is the heat sink fin structure as shown in  FIG. 2  and  FIG. 3 .  
         [0021]     Referring to  FIG. 7 , a schematic diagram illustrates ion beam sputtering for manufacturing a heat sink fin structure according to another embodiment of the present invention. In the embodiment, the manufacturing procedure is that a target  72  is molded by diamond materials first of all. The placement angle of the target  72  and the shooting direction of ion beam of a first ion gun  71  are approximately forty five degrees. The diamond particles fired by the first ion gun  71  fly to the front of a second ion gun  73 . The diamond particles is then sputtered to the surface of a metal material  74  to form uniform diamond films by providing enough kinetic energy from the first ion gun  71 . The remaining diamond particles are discharged by a waste gas exit  75 . By the way mentioned above, a heat conduction material coating diamond particles can be acquired and is the heat sink fin structure as shown in  FIG. 2  and  FIG. 3 .  
         [0022]     Moreover, the heat conduction material having a metal and a bracket structure of carbon element can be further made by electroplating, melting except CVD and PVD of the above embodiments.  
         [0023]     Although the features and advantages of the embodiments according to the preferred invention are disclosed, it is not limited to the embodiments described above, but encompasses any and all modifications and changes within the spirit and scope of the following claims.