Heat-radiating base plate and heat sink using the same

Abstract

A heat-radiating base plate includes an aluminum-made upper base plate, a copper-made lower base plate, and a heat pipe unit. The upper base plate has a first face, an opposite second face, and a slotted pattern extended through the upper base plate in a thickness direction to communicate the first face with the second face. The heat pipe unit is set in the slotted pattern, and has a thickness equal to a depth of the slotted pattern. The heat pipe unit has a first and a second heat-conducting flat face flush with the first and the second face of the upper base plate, respectively. The second face and the second heat-conducting face are attached to the lower base plate, which has another flat face in contact with a heat-producing unit. A radiating fin assembly can be mounted to a top of the heat-radiating base plate to provide a heat sink.

1 . A heat-radiating base plate, comprising:
 a lower base plate;   at least one upper base plate being corresponding to and attached to the lower base plate, the upper base plate having a first face, an opposite second face, and a slotted pattern extended through the upper base plate in a thickness direction to communicate the first face with the second faces; and   a heat pipe unit having at least one heat pipe and being set in the slotted pattern on the upper base plate.   
     
     
         2 . The heat-radiating base plate as claimed in  claim 1 , wherein the heat pipe unit has a first heat-conducting face and a second heat-conducting face corresponding to and flush with the first face and the second face of the upper base plate, respectively. 
     
     
         3 . The heat-radiating base plate as claimed in  claim 1 , wherein the first and the second heat-conducting face of the heat pipe unit are flat faces. 
     
     
         4 . The heat-radiating base plate as claimed in  claim 1 , wherein the slotted pattern is selected from the group consisting of a plurality of straightly extended and parallelly spaced slots, a plurality of obliquely extended and parallelly spaced slots, and a plurality of curved and spaced slots. 
     
     
         5 . The heat-radiating base plate as claimed in  claim 1 , wherein the lower base plate has a contact face for bearing on a heat-producing unit. 
     
     
         6 . A heat sink with heat-radiating base plate, comprising:
 a heat-radiating base plate including:
 a lower base plate; 
 at least one upper base plate being corresponding to and attached to the lower base plate, the upper base plate having a first face, an opposite second face, and a slotted pattern extended through the upper base plate in a thickness direction to communicate the first face with the second face; and 
 a heat pipe unit having at least one heat pipe and being set in the slotted pattern; and 
   a radiating fin assembly formed from a plurality of stacked and spaced radiating fins, and the radiating fin assembly being mounted to the first face of the upper base plate.   
     
     
         7 . The heat sink with heat-radiating base plate as claimed in  claim 6 , wherein the heat pipe unit has a first heat-conducting face and a second heat-conducting face, which are corresponding to and flush with the first face and the second face of the upper base plate, respectively. 
     
     
         8 . The heat sink with heat-radiating base plate as claimed in  claim 6 , wherein the slotted pattern is selected from the group consisting of a plurality of straightly extended and parallelly spaced slots, a plurality of obliquely extended and parallelly spaced slots, and a plurality of curved and spaced slots. 
     
     
         9 . The heat sink with heat-radiating base plate as claimed in  claim 6 , wherein the lower base plate has a contact face for bearing on a heat-producing unit.