Fin, thermal module, and method for assembling the same

Abstract

This invention provides a method for assembling the thermal module. According to the invention, the fin can be combined with a heat pipe and a joint material to form the thermal module. The fin includes a main body having a through hole and an feeding hole communicating with each other. The heat pipe passes through the through hole. The joint material is injected into the feeding hole to fill a clearance between the heat pipe and the inner wall of the through hole. In addition, when the fin is combined with the heat pipe, the feeding hole is above the through hole, the joint material flows downward along the clearance, and the clearance gradually narrows along a flowing direction of the joint material.

1 . A cooling fin combined with a heat pipe and a joint material, the cooling fin comprising:
 a main body having a through hole and an feeding hole, the heat pipe passing through the through hole, the feeding hole communicating with the through hole, the joint material injected into the feeding hole to fill a clearance between the heat pipe and the inner wall of the through hole;   wherein when the cooling fin is combined with the heat pipe, the feeding hole is above the through hole, the joint material flows downward along the clearance, and the clearance gradually narrows along a flowing direction of the joint material.   
   
   
       2 . The cooling fin according to  claim 1 , wherein a cross-section of the heat pipe is flat. 
   
   
       3 . The cooling fin according to  claim 1 , wherein the through hole has a first end portion and a second end portion, and the feeding hole is located at a vertical line connecting the first end portion and the second end portion. 
   
   
       4 . The cooling fin according to  claim 1 , wherein the through hole has a first end portion and a second end portion, and an angle between a central line of the feeding hole and a vertical line connecting the first end portion and the second end portion is between 0 to 45 degrees. 
   
   
       5 . The cooling fin according to  claim 1 , wherein a width of the feeding hole is equal to that of the through hole. 
   
   
       6 . The cooling fin according to  claim 1 , wherein the joint material is solder paste. 
   
   
       7 . A thermal module comprising:
 a heat pipe;   a joint material; and   a plurality of cooling fins, each cooling fin including a main body, the main body having a through hole and an feeding hole, the heat pipe passing through the through hole, the feeding hole communicating with the through hole, the joint material injected into the feeding hole to fill a clearance between the heat pipe and the inner wall of the through hole;   wherein when the thermal module is assembled, the feeding hole is located above the through hole, the joint material flows downward along the clearance, and the clearance gradually narrows along a flowing direction of the joint material.   
   
   
       8 . The thermal module according to  claim 7 , wherein a cross-section of the heat pipe is flat. 
   
   
       9 . The thermal module according to  claim 7 , wherein the through hole has a first end portion and a second end portion, and the feeding hole is located at a vertical line connecting the first end portion and the second end portion. 
   
   
       10 . The thermal module according to  claim 7 , wherein the through hole has a first end portion and a second end portion, and an angle between a central line of the feeding hole and a vertical line connecting the first end portion and the second end portion is between 0 to 45 degrees. 
   
   
       11 . The thermal module according to  claim 7 , wherein a width of the feeding hole is equal to that of the through hole. 
   
   
       12 . The thermal module according to  claim 7 , wherein the joint material is solder paste. 
   
   
       13 . The thermal module according to  claim 7 , further comprising:
 a fixture base including a groove for containing the heat pipe and fastening the heat pipe to approach a heating element.   
   
   
       14 . A method for assembling a thermal module to combine a fin with a heat pipe and a joint material, the method comprising the following steps of:
 making a plurality of fins, each fin having a through hole and an feeding hole communicating with each other;   making the heat pipe pass through the through holes of the fins and making the feeding hole above the through hole;   injecting the joint material into the feeding hole to fill a clearance between the heat pipe and the inner wall of the through hole; and   making the joint material flow downward along the clearance, the clearance gradually narrowing along the flowing direction.   
   
   
       15 . The method according to  claim 14 , wherein the fins are disposed via a holding device to keep the feeding hole above the through hole. 
   
   
       16 . The method according to  claim 14 , wherein in the step of making the joint material flow downward along the clearance, the method further comprises the steps of:
 heating the joint material to melt the joint material; and   cooling the joint material to solidify the joint material to tightly combine the cooling fins and the heat pipe after the joint material flows downward along the clearance to the bottom of the through hole.   
   
   
       17 . The method according to  claim 16 , wherein the joint material is solder paste. 
   
   
       18 . The method according to  claim 14 , wherein the through hole has a first end portion and a second end portion, and the feeding hole is located at a vertical line connecting the first end portion and the second end portion. 
   
   
       19 . The method according to  claim 14 , wherein the through hole has a first end portion and a second end portion, and an angle between a central line of the feeding hole and a vertical line connecting the first end portion and the second end portion is between 0 to 45 degrees. 
   
   
       20 . The method according to  claim 14 , wherein a width of the feeding hole is equal to that of the through hole.