Heat dissipation assembly

Abstract

A heat dissipation assembly has a containment apparatus preventing unwanted migration of a thermal interface material to surrounding areas on a bottom surface of a heat sink. The heat sink includes a base and a plurality of fins extending from the base. The base defines two elongated grooves at two opposite lateral sides thereof, respectively. The containment apparatus includes a plate located below the thermal interface material and an annular frame extending upwardly from edges of the plate and attached to a periphery of the base of the heat sink. The frame defines two inserting ribs projecting inwardly from inner walls thereof and correspondingly inserting into the grooves of the base.

1 . A heat dissipation assembly, comprising:
 a heat sink comprising a base and a plurality of fins extending from the base, the base defining two elongated grooves at two opposite lateral sides thereof, respectively;   a thermal interface material applied on a bottom surface of the base of the heat sink; and   a containment apparatus mounted on a bottom of the heat sink, comprising a plate located below the bottom surface of the base and a frame extending upwardly from edges of the plate and having two inserting ribs protruding inwardly from inner walls thereof,   wherein the frame is attached to a periphery of the base and the two inserting ribs are engagingly received in the grooves of the base.   
   
   
       2 . The heat dissipation assembly as claimed in  claim 1 , wherein the inserting ribs are elongated and parallel to the plate. 
   
   
       3 . The heat dissipation assembly as claimed in  claim 1 , wherein the plate has a shape the same as that of the base, and is parallel to the bottom surface of the base. 
   
   
       4 . The heat dissipation assembly as claimed in  claim 1 , wherein the frame consists of a plurality of elongated sidewalls interconnected together and respectively extending upwardly from corresponding edges of the plate. 
   
   
       5 . The heat dissipation assembly as claimed in  claim 4 , wherein the two inserting ribs respectively projects from two parallel, opposite ones of the sidewalls. 
   
   
       6 . The heat dissipation assembly as claimed in  claim 5 , wherein the frame further defines a plurality of spaced protruding ribs projecting inwardly from other sidewalls. 
   
   
       7 . The heat dissipation assembly as claimed in  claim 6 , wherein the protruding ribs are perpendicular to the plate. 
   
   
       8 . The heat dissipation assembly as claimed in  claim 1 , wherein the grooves are parallel to the bottom surface of the base. 
   
   
       9 . The heat dissipation assembly as claimed in  claim 1 , wherein the heat sink has two horizontal arms respectively extending outwardly from two opposite sides of the base, and two slantwise arms extending upwardly and outwardly extending from a top side of the base. 
   
   
       10 . The heat dissipation assembly as claimed in  claim 1 , wherein the frame further comprises an annular flange extending outwardly from a top end thereof, the flange abutting the bottom of the heat sink around the base. 
   
   
       11 . A heat dissipation assembly comprising:
 a heat sink comprising a base and a plurality of fins extending from the base, the base having a plurality of lateral sides wherein two opposite ones of the lateral sides define two elongated grooves therein, respectively;   a thermal interface material applied on a bottom surface of the base of the heat sink;   a containment apparatus attached to a bottom of the heat sink, comprising a plate and a frame extending upwardly from edges of the plate;   wherein the frame consists of a plurality of sidewalls correspondingly attached to the lateral sides of the base, two elongated inserting ribs respectively project inwardly from two opposite ones of the sidewalls of the frame and correspondingly inserting into the two grooves of the base, and a plurality of protruding ribs project inwardly from other ones of the sidewalls of the frame and abutting against corresponding lateral sides of the base of the heat sink.   
   
   
       12 . The heat dissipation assembly as claimed in  claim 11 , wherein the base has a shape the same as that of the plate. 
   
   
       13 . The heat dissipation assembly as claimed in  claim 11 , wherein the protruding ribs are perpendicular to the plate. 
   
   
       14 . The heat dissipation assembly as claimed in  claim 11 , wherein the grooves are parallel to the bottom surface of the base. 
   
   
       15 . The heat dissipation assembly as claimed in  claim 11 , wherein the inserting ribs are parallel to the plate.